CN106448570A - High-power area dimming control method, control device and television - Google Patents
- ️Wed Feb 22 2017
CN106448570A - High-power area dimming control method, control device and television - Google Patents
High-power area dimming control method, control device and television Download PDFInfo
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- CN106448570A CN106448570A CN201610822419.4A CN201610822419A CN106448570A CN 106448570 A CN106448570 A CN 106448570A CN 201610822419 A CN201610822419 A CN 201610822419A CN 106448570 A CN106448570 A CN 106448570A Authority
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- 2016-09-14 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a high-power area dimming control method, control device and a television. The high-power area dimming control method includes the steps: receiving brightness information of display areas correspondingly controlled by branch circuits of a constant-current driving circuit, and outputting corresponding constant current according to the brightness information of the display areas; calculating power consumed by each display area to obtain total power consumed by all display areas; recording duration time of the total power higher than preset power when the total power consumed by the all display areas is higher than the preset power; controlling the constant current outputted by the branch circuits of the constant-current driving circuit to reduce in an equal proportion manner according to current total power and preset rated power when duration time of the total power higher than preset rated power is higher than preset time. The current of the branch circuits are reduced in an equal proportion manner, existing contrast ratio and display effect of image information are ensured, display effect and lower-power requirements are ensured, and high-temperature hidden dangers caused by long high-power operations are avoided.
Description
Technical field
The present invention relates to backlight control techniques field, particularly to a kind of high power region dimming controlling method, control dress Put and television set.
Background technology
TV industry always to pursue more perfect picture and sound as target, the development of digitizing technique, accelerate big Size, the developing steps of ultra high-definition TV.At present Ge great panel vendor and television manufacturer progressively develop 100 inches of panel and electricity Depending on product, large size TV will reach optimal tv effect, relatively more lamp bars are needed on backlight module it means that Television set has higher power consumption, requires television power panel to have high load capacity simultaneously.And add user and open The perfection pursuit to TV outward appearance for the originator, TV is with greater need for ultra-thin feature.High-power TV also will necessarily bring thermal design Problem, that is, TV in high-high brightness, there is higher temperature, and an actual research and development data display, a 100 inches of electricity During apparent TV brightness highest, power is 700W, works less than 10 minutes simultaneously, even as high as 120 degree of its screen back plate temperature More than, bring serious potential safety hazard and system reliability design.Even with local dimming technology, as a certain bright field relatively Many pictures（As white field entirely）Problems yet suffer from.Simultaneously because home environment space limits, relatively in-plant sight for a long time See the large size TV under high brightness, eyes also can be made uncomfortable.
Thus prior art could be improved and improves.
Content of the invention
A kind of in view of in place of above-mentioned the deficiencies in the prior art, it is an object of the invention to provide high power region brightness adjustment control Method, control device and television set, are controlled in rated operating range it is ensured that showing by the overall power consuming viewing area Show and also reached low power requirements while effect, and avoid and keep high power state to lead to operating temperature height to bring for a long time Potential safety hazard and eyesight influence.
In order to achieve the above object, this invention takes technical scheme below：
A kind of high power region dimming controlling method, it comprises the steps：
Receive the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and bright according to each viewing area The degree corresponding continuous current of information output；
Calculate the power that each viewing area is consumed, and draw the general power that all viewing areas consume；
When the general power that all viewing areas consume is more than default rated power, general power is more than predetermined power lasting when Between carry out timing；
If the duration that general power is more than default rated power is more than Preset Time, specified with default according to current general power The continuous current equal proportion of Power Control constant-current drive circuit each branch road output declines.
In described high power region dimming controlling method, the described each branch road of constant-current drive circuit that receives corresponds to the aobvious of control Before showing the monochrome information in region, and the step according to the monochrome information corresponding continuous current of output of each viewing area, also Including：
Picture signal is decoded, obtains the luminance signal of each pixel of every two field picture；
Each pixel of every two field picture is divided into multiple pixel regions by preset order, the quantity of described pixel region and position with Viewing area corresponds；
Calculate the average luminance information value of each pixel region, the corresponding monochrome information exporting each viewing area respectively.
In described high power region dimming controlling method, the described each branch road of constant-current drive circuit that receives corresponds to the aobvious of control Show the monochrome information in region, and the step that corresponding continuous current is exported according to the monochrome information of each viewing area, including：
Receive the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit；
Monochrome information according to each viewing area and the high-high brightness value of information calculate corresponding first pwm signal in each viewing area Dutycycle；
The first pwm signal dutycycle according to each viewing area and maximum current value export corresponding continuous current.
In described high power region dimming controlling method, if the duration that described general power is more than predetermined power is more than Preset Time, controls continuous current of constant-current drive circuit each branch road output etc. according to current general power and default rated power The step that ratio declines, including：
If the duration that general power is more than default rated power is more than Preset Time, recalculate current general power；
If each, still above default rated power, is shown by current general power according to current general power and default rated power Show that the first pwm signal dutycycle in region is updated to the second pwm signal dutycycle；
Declined according to the continuous current equal proportion of described second pwm signal Duty ratio control constant-current drive circuit each branch road output.
In described high power region dimming controlling method, described second pwm signal dutycycle PWM2=P0/ P * PWM1, wherein, P0For presetting rated power, P is current general power, and PWM1 is the first pwm signal dutycycle.
A kind of high power region light adjusting and controlling device, including data signal plate and constant current plate, described data signal plate connects Constant current plate, described constant current plate is provided with multigroup constant-current drive circuit, described constant current plate is additionally provided with：
Current output module, for receiving the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and root Monochrome information according to each viewing area exports corresponding continuous current；
Power computation module, for calculating the power that each viewing area is consumed, and draws the total work that all viewing areas consume Rate；
Timing module, when the general power for consuming when all viewing areas is more than default rated power, is more than pre- to general power If the duration of power carries out timing；
Adjustment module, if the duration being more than default rated power for general power be more than Preset Time, according to current total Power and default rated power control the continuous current equal proportion of constant-current drive circuit each branch road output to decline.
In described high power region light adjusting and controlling device, described data signal plate is provided with：
Decoder module, for being decoded to picture signal, obtains the luminance signal of each pixel of every two field picture；
Region division module, for being divided into multiple pixel regions, described pixel by each pixel of every two field picture by preset order The quantity in region and position are corresponded with viewing area；
Brightness calculation module, for calculating the average luminance information value of each pixel region respectively, corresponding each viewing area of output The monochrome information in domain.
In described high power region light adjusting and controlling device, described current output module includes：Receiving unit, for receiving The monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit；
Duty ratio control unit, calculates each viewing area pair for the monochrome information according to each viewing area and maximum brightness value The the first pwm signal dutycycle answered；
Current control unit, exports corresponding for the first pwm signal dutycycle according to each viewing area and maximum current value Continuous current.
In described high power region light adjusting and controlling device, if described power computation module is additionally operable to general power more than default The duration of rated power is more than Preset Time, then recalculate current general power,
Described adjustment module includes：
Updating block, if for current general power still above default rated power, according to current general power and default volume Determine power and the first pwm signal dutycycle of each viewing area is updated to the second pwm signal dutycycle；
Current regulation unit, for the perseverance being exported according to each branch road of described second pwm signal Duty ratio control constant-current drive circuit Stream equal current proportion declines.
A kind of television set, it includes the as above high power region light adjusting and controlling device described in item.
Compared to prior art, in high power region dimming controlling method, control device and television set that the present invention provides, Described high power region dimming controlling method passes through to receive the brightness of the corresponding viewing area controlling of each branch road of constant-current drive circuit Information, and corresponding continuous current is exported according to the monochrome information of each viewing area；Calculate each viewing area afterwards to be consumed Power, and draw the general power that all viewing areas consume；Preset when the general power that all viewing areas consume is more than afterwards During rated power, the duration being more than predetermined power to general power carries out timing；If general power is more than default rated power Duration is more than Preset Time, controls the output of constant-current drive circuit each branch road according to current general power and default rated power Continuous current equal proportion decline, controlled in rated operating range by the overall power consuming viewing area, and adopt Each branch current equal proportion reduces it is ensured that the existing contrast of image information and picture display effect are it is ensured that display effect Also reached low power requirements simultaneously, and avoided and keep high power state to lead to the safety that operating temperature height brings hidden for a long time Suffer from and eyesight influence.
Brief description
The flow chart of the high power region dimming controlling method that Fig. 1 provides for the present invention；
The corresponding control of each branch road of constant-current drive circuit is received for the present invention in the high power region dimming controlling method that Fig. 2 provides Viewing area monochrome information, and export the stream of the step of corresponding continuous current according to the monochrome information of each viewing area Cheng Tu；
If general power is more than continuing of default rated power in the high power region dimming controlling method that Fig. 3 provides for the present invention Time is more than Preset Time, controls the perseverance of constant-current drive circuit each branch road output according to current general power and default rated power The flow chart of the step that stream equal current proportion declines；
The structured flowchart of the high power region light adjusting and controlling device that Fig. 4 provides for the present invention；
The structured flowchart of constant current plate in the high power region light adjusting and controlling device that Fig. 5 provides for the present invention；
The structured flowchart of data signal plate in the high power region light adjusting and controlling device that Fig. 6 provides for the present invention；
Constant-current drive circuit and viewing area in Application Example in the high power region light adjusting and controlling device that Fig. 7 provides for the present invention Domain divides schematic diagram；
The workflow of data signal plate in Application Example in the high power region light adjusting and controlling device that Fig. 8 provides for the present invention Figure；
The workflow diagram of constant current plate in Application Example in the high power region light adjusting and controlling device that Fig. 9 provides for the present invention.
Specific embodiment
In view of in prior art the shortcomings of the display screen potential safety hazard that continuous firing is brought under high power state, the present invention Purpose be to provide a kind of high power region dimming controlling method, control device and television set, by consuming viewing area Overall power control in rated operating range it is ensured that also having reached low power requirements while display effect, and avoid Keep high power state to lead to for a long time potential safety hazard that operating temperature height brings and eyesight influence.
For making the purpose of the present invention, technical scheme and effect clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings The present invention further describes.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to Limit the present invention.
Refer to Fig. 1, the high power region dimming controlling method that the present invention provides comprises the steps：
S100, the monochrome information of the corresponding viewing area controlling of the reception each branch road of constant-current drive circuit, and according to each viewing area The monochrome information in domain exports corresponding continuous current；
The power that S200, each viewing area of calculating are consumed, and draw the general power that all viewing areas consume；
S300, when the general power that all viewing areas consume is more than default rated power, predetermined power is more than to general power Duration carries out timing；
If the duration that S400 general power is more than default rated power is more than Preset Time, according to current general power with advance If rated power controls the continuous current equal proportion of constant-current drive circuit each branch road output to decline.
The high power region dimming controlling method that the present invention provides is premised on local dimming, is designed with constant current plate N group constant-current drive circuit, is connected, every group of lamp bar that can drive corresponding viewing area in the form of daisy chain, by receiving constant current The monochrome information of the corresponding viewing area controlling of each branch road of drive circuit, and phase is exported according to the monochrome information of each viewing area The continuous current answered, with the corresponding lamp bar driving each viewing area；Calculate the power that each viewing area is consumed afterwards, and draw The general power that all viewing areas consume, because the voltage of constant-current drive circuit output is given value, this voltage is shown with each Show that the current value in region is multiplied, you can calculate the power that the lamp bar of each viewing area is consumed, the work(that each region is consumed Rate is added, and obtains the general power that all viewing areas are that entire display screen is consumed；Afterwards by general power and default rated power It is compared, if general power is more than default rated power and holds time more than Preset Time（Such as three minutes）, then basis Current general power and default rated power control the continuous current equal proportion of constant-current drive circuit each branch road output to decline, for example Being calculated current general power is 500W, and default rated power is 400W, then control each according to the ratio of 400/500=80% The continuous current equal proportion of branch road declines, and that is, so that the current value after adjustment is 80% before adjusting, such as former output current is The region branch road of 100mA, then control its output current to be 80mA after adjusting, by being reduced using each branch current equal proportion, Ensure the existing contrast of image information and picture display effect it is ensured that also having reached low power requirements while display effect, And avoid keep high power state to lead to for a long time potential safety hazard that operating temperature height brings and eyesight influence.
Further, the described monochrome information receiving the corresponding viewing area controlling of each branch road of constant-current drive circuit, and root Before exporting the step of corresponding continuous current according to the monochrome information of each viewing area, also include：
Picture signal is decoded, obtains the luminance signal of each pixel of every two field picture；
Each pixel of every two field picture is divided into multiple pixel regions by preset order, the quantity of described pixel region and position with Viewing area corresponds；
Calculate the average luminance information value of each pixel region, the corresponding monochrome information exporting each viewing area respectively.
When being embodied as, received picture signal and be decoded by data signal plate, obtain each pixel intensity in image Each pixel of every two field picture is divided into multiple pixel regions by preset order by signal afterwards, the quantity of described pixel region and Position is corresponded with viewing area, and for example according to screen, order from top to bottom, from left to right is in turn divided into multiple displays Region, the division of pixel region then corresponds to the division of viewing area, and quantity is all corresponded with position；Calculate each afterwards respectively The average luminance information value of pixel region, the corresponding monochrome information exporting each viewing area, for example, then bright taking 8bit as a example The scope of the degree value of information is 0-255, and that is, the monochrome information value of each pixel can be 0-255, by obtaining the brightness of each pixel Signal, and the average luminance information value going out each pixel region calculating, this average luminance information value is then corresponding viewing area The monochrome information in domain, for example, the average luminance information value of a certain pixel region is A, then corresponding viewing area monochrome information is A.Calculate the mean flow rate of regional by region division, provide data basis for follow-up brightness adjustment control.
Specifically, refer to Fig. 2, the brightness letter of the corresponding viewing area controlling of each branch road of described reception constant-current drive circuit Breath, and the step that corresponding continuous current is exported according to the monochrome information of each viewing area, including：
S101, the monochrome information of the corresponding viewing area controlling of the reception each branch road of constant-current drive circuit；
S102, the monochrome information according to each viewing area and the high-high brightness value of information calculate each viewing area corresponding first Pwm signal dutycycle；
S103, the first pwm signal dutycycle according to each viewing area and maximum current value export corresponding continuous current.
Data signal plate calculates the average luminance information value of each pixel region and exports the brightness letter of corresponding viewing area After breath, the monochrome information that constant current plate first receives each viewing area exports corresponding continuous current again, and constant-current drive circuit Realized by controlling internal pwm signal dutycycle during curent change, that is, dutycycle is to export maximum current value I when 100%, accounts for It is empty that than during for 50%, output current is 50%I, specifically, according to the monochrome information of each viewing area and the high-high brightness value of information Calculate the corresponding first pwm signal dutycycle in each viewing area, the brightness letter of the first pwm signal dutycycle=each viewing area Breath/high-high brightness the value of information, for example, so that 8bit represents as a example, the high-high brightness value of information is 255, if currently received a certain area The monochrome information in domain is 127, then the first pwm signal dutycycle in this region is 127/255 ≈ 50%, according to each viewing area The first pwm signal dutycycle and maximum current value export corresponding continuous current, such as maximum current value is I, if a certain aobvious When the first pwm signal dutycycle showing region is for 50%, then the required electric current in this region is 50%I.By controlling each area The first pwm signal dutycycle in domain is controlling its output current, the flexible control and regulation of feasible region electric current.
Further, refer to Fig. 3, if the duration that described general power is more than predetermined power is more than Preset Time, root Decline according to the continuous current equal proportion that current general power and default rated power control the output of constant-current drive circuit each branch road Step, including：
If the duration that S401 general power is more than default rated power is more than Preset Time, recalculate current total work Rate；
If the current general power of S402, will according to current general power and default rated power still above default rated power First pwm signal dutycycle of each viewing area is updated to the second pwm signal dutycycle；
S403, the continuous current equal proportion according to the output of described second pwm signal Duty ratio control constant-current drive circuit each branch road Decline.
When being embodied as, after the general power calculating all viewing areas, general power is compared with default rated power, The computational methods of concrete general power are first to calculate the performance number of regional respectively, and this performance number is a PWM letter in this region Number dutycycle, maximum current value, the product of magnitude of voltage three, after the performance number calculating each viewing area, then by institute The performance number having viewing area is added, you can obtain the general power of entire display screen consumption, and general power specified is used with default It is compared, if general power is more than default rated power, starts timing, when general power is more than continuing of default rated power When time is more than Preset Time, recalculate current general power it is ensured that the accuracy of power calculation, if current general power is still So it is more than default rated power, then according to current general power and default rated power, the first PWM of each viewing area is believed Number dutycycle is updated to the second pwm signal dutycycle, and specifically more new regulation is, the second pwm signal dutycycle PWM2=P0/P * PWM1, wherein, P0For presetting rated power, P is current general power, and PWM1 is the first pwm signal dutycycle, for example current General power is 500W, and default rated power is 400W, and the first pwm signal dutycycle is 50%, then the second pwm signal after updating Dutycycle PWM2=400/500*50%=40%, afterwards according to new dutycycle, i.e. the second pwm signal Duty ratio control constant current drives The continuous current equal proportion of circuit each branch road output declines, such as the electric current before updating is 50%I, then the electric current after updating declines For 40%I, and each branch road is all electric current before equal proportion drops to 80% it is ensured that the existing contrast of image information and picture Display effect, and make display screen have lower power consumption and lower heat dissipation capacity so as to bulk temperature is in controlled range Interior, pass through high power duration timing process simultaneously and also can eliminate high temperature safe hidden danger and the damage to user's eyesight further Wound.
The present invention accordingly also provides a kind of high power region light adjusting and controlling device, refers to Fig. 4 and Fig. 5, described high power Local dimming control device, including data signal plate 10 and constant current plate 20, described data signal plate 10 connects constant current plate 20, specifically Data signal plate 10 is communicated by SPI interface mode with constant current plate 20, described constant current plate 20 is provided with multigroup constant current and drives Dynamic circuit, every group of constant-current drive circuit drives the lamp bar of corresponding viewing area, and described constant current plate 20 is additionally provided with electric current output Module 101, power computation module 102, timing module 103 and adjustment module 104, described current output module 101, power calculation Module 102, timing module 103 are sequentially connected, and described current output module 101 is also connected with adjustment module 104, wherein, described electricity Stream output module 101 is used for receiving the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and according to each The monochrome information of individual viewing area exports corresponding continuous current；Described power computation module 102 is used for calculating each viewing area The power being consumed, and draw the general power that all viewing areas consume；Described timing module 103 is used for when all viewing areas When the general power consuming is more than default rated power, the duration being more than predetermined power to general power carries out timing；Described tune If section module 104 is used for general power is more than the duration of default rated power more than Preset Time, according to current general power The continuous current equal proportion controlling the output of constant-current drive circuit each branch road with default rated power declines.Specifically refer to above-mentioned side The corresponding embodiment of method.
Further, see also Fig. 6, described data signal plate 10 is provided with decoder module 201, region division mould Block 202 and brightness calculation module 203, described decoder module 201, region division module 202 and brightness calculation module 203 connect successively Connect, wherein, described decoder module 201 is used for decoding video signal, obtains the luminance signal of each pixel of every two field picture；Institute State region division module 202 for each pixel of every two field picture is divided into multiple pixel regions, described pixel by preset order The quantity in region and position are corresponded with viewing area；Described brightness calculation module 203 is used for calculating each pixel region respectively The average luminance information value in domain, the corresponding monochrome information exporting each viewing area.Specifically refer to the corresponding reality of said method Apply example.
Specifically, current output module 101 includes receiving unit 1011, Duty ratio control unit 1012 and current control list Unit 1013, described receiving unit 1011, Duty ratio control unit 1012 and current control unit 1013 are sequentially connected, described duty It is also connected with adjustment module 104 than control unit 1012, wherein, described receiving unit 1011 is used for receiving each of constant-current drive circuit The monochrome information of the corresponding viewing area controlling in road；Described Duty ratio control unit 1012 is used for bright according to each viewing area Degree information and maximum brightness value calculate the corresponding first pwm signal dutycycle in each viewing area；Described current control unit 1013 Export corresponding continuous current for the first pwm signal dutycycle according to each viewing area and maximum current value.Specifically please Refering to the corresponding embodiment of said method.
Further, if described power computation module 102 is additionally operable to the duration that general power is more than default rated power More than Preset Time, then recalculate current general power, described adjustment module 104 includes updating block 1041 and electric current is adjusted Unit 1042, described updating block 1041 connects Duty ratio control unit 1012 and current regulation unit 1042, wherein, described more If new unit 1041 is used for current general power still above default rated power, according to current general power and default specified work( First pwm signal dutycycle of each viewing area is updated to the second pwm signal dutycycle by rate；Described current regulation unit 1042 are used under the continuous current equal proportion according to the output of described second pwm signal Duty ratio control constant-current drive circuit each branch road Fall.Specifically refer to the corresponding embodiment of said method.
The present invention correspondingly provides a kind of television set, and it includes the as above high power region brightness adjustment control described in any one Device, due to above described high power region light adjusting and controlling device being had been carried out with describes in detail, is not described further herein.
In order to be better understood from technical scheme, below in conjunction with Fig. 7, Fig. 8 and Fig. 9, lift specific embodiment to this The adjustment process of the high power region light adjusting and controlling device of invention is described in detail：
With certain 100 inches of 4K display screen, as a example 256 local dimmings, each viewing area when reaching high-high brightness, display screen Power consumption is 700W it is known that when maximum, constant current driving current is I, and voltage is U（Voltage is fixed value）, as shown in fig. 7, permanent Stream plate is designed with 16 groups of constant-current drive circuits altogether, and wherein every group of constant-current drive circuit can drive the lamp group in 16 regions, and constant current drives It is 1-16 region that circuit 1 drives constant current region, and it is 17-32 region that constant-current drive circuit 2 drives constant current region, constant-current drive circuit It is 241-256 region that constant-current drive circuit 16 drives constant current region.
The corresponding screen order from top to bottom, from left to right in each viewing area divides successively, and each constant current of correspondence drives Circuit, i.e. region corresponding to constant-current drive circuit 1 control first row backlight lamp bar, constant-current drive circuit 2 controls secondary series backlight Region corresponding to lamp bar, constant-current drive circuit 16 controls region corresponding to the 16th row backlight lamp bar.According to system design considerations, Under hot environment working condition, maximum temperature does not surpass 120 degree, such as works long hours, and LED temperature relaxes in reliability and picture In the case of suitable, default rated power should be 350W, that is, entirely white field when, need to reduce the 50% of the peak brightness of display screen or with Under.
As shown in figure 8, the workflow of data signal plate comprises the steps：
S11, the signal of decoding input, obtain the chromaticity coordinates of each pixel and the luminance signal of every two field picture；
S12, each pixel of every two field picture is divided into 256 regions according to preset order；
S13, respectively zoning 1, the mean value of the monochrome information in region 2 ... region 256；
S14, the monochrome information according to the corresponding output display region of the average luminance information value calculating, are sent out by SPI communication mode Give constant current plate；
S15, receive the reception confirmation signal of constant current plate after, proceed by the transmission of the mean value of lower two field picture monochrome information.
After starting working, system is initialized, and data signal plate is decoded to the signal of input, obtains every two field picture The chromaticity coordinates of each pixel and luminance signal, then carry out dividing 256 regions according to corresponding order to each pixel of every two field picture, that is, According to upper down, order from left to right；Respectively zoning 1, region 2 ... until the monochrome information in region 256 is average Value, herein as represented with 8bit, then for 0 ~ 255（Corresponding hexadecimal 0xFF）, you can when thinking 100% white, that is transmitted is bright The degree value of information is 255, such as represents for 10bit, then for 0 ~ 1023, aobvious according to the corresponding output of the average luminance information value calculating afterwards Show the monochrome information in region, for example, the average luminance information value of a certain pixel region is A, then corresponding viewing area brightness letter Cease for A, the monochrome information of viewing area is sent to by constant current plate by SPI communication mode, constant current plate is receiving the pixel of every frame A verification value can be returned after the regional luminance value of information, data signal plate receive constant current return reception verification value after start into The transmission of next two field picture of row.
As shown in figure 9, the workflow of constant current plate comprises the steps：
The viewing area monochrome information that S21, each constant-current drive circuit of reception are controlled；
S22, the luminance signal according to each region, the LED calculating required for each region shows drive internal control PWM value；
S23, the display in each region is controlled respectively according to the PWM value calculating gained；
S24, calculate the continuous current of this Region control LED according to the PWM value of each Region control；
S25, the power being consumed according to continuous current and known voltage, each region of calculating；
S26, the power addition that all regions are consumed；
S27, judge that whether power be more than 350W, if so, then execution step S28, if it is not, then return to step S21；
S28, timing three minutes；
S29, recalculate general power P；
S210, judge that whether general power is more than 350W again, if so, then execution step S211, if it is not, then return to step S21；
S211, the ratio that the constant current internal control PWM value of regional is multiplied by 350/P export again.
After system worked well, on the MCU on constant current plate electricity and carry out system initialization, start afterwards to receive each constant current The monochrome information of the viewing area that drive circuit is controlled, the value such as receiving is 255, then this region needs taking 8bit as a example Shown with high-high brightness；After receiving the monochrome information value in each region, start to calculate required LED drive shown by each region Dynamic internal control PWM, such as some region of reception value are 127, then the corresponding brightness in this region shows the 50% of about high-high brightness, enters One step controls the display in each region according to the PWM value calculating, and taking reception value 127 as a example, now internal control PWM should be 50%, each constant current To be calculated the continuous current output that required internal control PWM controls LED, that is, continuous current now should be drive circuit 50%I, the continuous current according to regional and known voltage afterwards, calculate the power that regional consumes, further The power of regional is added, obtains general power P, this power P is compared with 350W, if power is not more than 350W, Then return to the flow process receiving monochrome information；If greater than 350W, then start timing about three minutes, after timing, meter is worked as again The power in each region of front control and general power, and continue to be compared with 350W, if power is not more than 350W, return To the flow process receiving monochrome information, if greater than 350W, the constant current internal control PWM of regional is exported with the ratio of 350/P, that is, The PWM value of regional is controlled to export after being multiplied by the ratio of 350/P again, the continuous current I1=350/P*PWM1*I after renewal, its Middle P is general power, and PWM1 is the PWM value before updating, and I is maximum current value, thus controlling the power in each region also under equal proportion Fall, and then control the general power of whole screen it is ensured that the controllability of complete machine temperature in preset range, avoid long-time simultaneously Play the infringement that highlighted picture causes to eyes of user it is preferable that the reduction of described power gradually reduces, to avoid the occurrence of Mutation causes the sense of discomfort that user uses it is ensured that also can guarantee that display effect while low-power low heat dissipating capacity.
In sum, in the present invention provides high power region dimming controlling method, control device and television set, described height Power region dimming controlling method passes through to receive the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and Monochrome information according to each viewing area exports corresponding continuous current；Calculate the power that each viewing area is consumed afterwards, And draw the general power that all viewing areas consume；Afterwards when the general power that all viewing areas consume is more than default rated power When, the duration being more than predetermined power to general power carries out timing；If general power is more than the duration of default rated power More than Preset Time, control the Constant Electric Current of constant-current drive circuit each branch road output according to current general power and default rated power Stream equal proportion declines, and is controlled in rated operating range by the overall power consuming viewing area, and adopts each branch road Equal current proportion reduces it is ensured that the existing contrast of image information and picture display effect are it is ensured that also reach while display effect Arrive low power requirements, and avoid keep high power state to lead to for a long time potential safety hazard that operating temperature height brings and eyesight Impact.
It is understood that for those of ordinary skills, with technology according to the present invention scheme and its can send out Bright design in addition equivalent or change, and all these change or replace the guarantor that all should belong to appended claims of the invention Shield scope.
Claims (10)
1. a kind of high power region dimming controlling method is it is characterised in that comprise the steps：
Receive the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and bright according to each viewing area The degree corresponding continuous current of information output；
Calculate the power that each viewing area is consumed, and draw the general power that all viewing areas consume；
When the general power that all viewing areas consume is more than default rated power, general power is more than predetermined power lasting when Between carry out timing；
If the duration that general power is more than default rated power is more than Preset Time, specified with default according to current general power The continuous current equal proportion of Power Control constant-current drive circuit each branch road output declines.
2. high power region dimming controlling method according to claim 1 is it is characterised in that described reception constant current drives electricity The monochrome information of the corresponding viewing area controlling of each branch road in road, and permanent accordingly according to the monochrome information output of each viewing area Before the step of stream electric current, also include：
Picture signal is decoded, obtains the luminance signal of each pixel of every two field picture；
Each pixel of every two field picture is divided into multiple pixel regions by preset order, the quantity of described pixel region and position with Viewing area corresponds；
Calculate the average luminance information value of each pixel region, the corresponding monochrome information exporting each viewing area respectively.
3. high power region dimming controlling method according to claim 1 is it is characterised in that described reception constant current drives electricity The monochrome information of the corresponding viewing area controlling of each branch road in road, and permanent accordingly according to the monochrome information output of each viewing area The step of stream electric current, including：
Receive the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit；
Monochrome information according to each viewing area and the high-high brightness value of information calculate corresponding first pwm signal in each viewing area Dutycycle；
The first pwm signal dutycycle according to each viewing area and maximum current value export corresponding continuous current.
If 4. high power region dimming controlling method according to claim 3 is it is characterised in that described general power is more than in advance If the duration of power is more than Preset Time, control constant-current drive circuit each according to current general power and default rated power The step that the continuous current equal proportion of branch road output declines, including：
If the duration that general power is more than default rated power is more than Preset Time, recalculate current general power；
If each, still above default rated power, is shown by current general power according to current general power and default rated power Show that the first pwm signal dutycycle in region is updated to the second pwm signal dutycycle；
Declined according to the continuous current equal proportion of described second pwm signal Duty ratio control constant-current drive circuit each branch road output.
5. high power region dimming controlling method according to claim 4 is it is characterised in that described second pwm signal accounts for Empty ratio PWM2=P0/ P*PWM1, wherein, P0For presetting rated power, P is current general power, and PWM1 accounts for for the first pwm signal Empty ratio.
6. a kind of high power region light adjusting and controlling device, including data signal plate and constant current plate, described data signal plate connects permanent Stream plate, described constant current plate is provided with multigroup constant-current drive circuit it is characterised in that being additionally provided with described constant current plate：
Current output module, for receiving the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit, and root Monochrome information according to each viewing area exports corresponding continuous current；
Power computation module, for calculating the power that each viewing area is consumed, and draws the total work that all viewing areas consume Rate；
Timing module, when the general power for consuming when all viewing areas is more than default rated power, is more than pre- to general power If the duration of power carries out timing；
Adjustment module, if the duration being more than default rated power for general power be more than Preset Time, according to current total Power and default rated power control the continuous current equal proportion of constant-current drive circuit each branch road output to decline.
7. high power region light adjusting and controlling device according to claim 6 is it is characterised in that set on described data signal plate It is equipped with：
Decoder module, for being decoded to picture signal, obtains the luminance signal of each pixel of every two field picture；
Region division module, for being divided into multiple pixel regions, described pixel by each pixel of every two field picture by preset order The quantity in region and position are corresponded with viewing area；
Brightness calculation module, for calculating the average luminance information value of each pixel region respectively, corresponding each viewing area of output The monochrome information in domain.
8. high power region light adjusting and controlling device according to claim 6 is it is characterised in that described current output module bag Include：
Receiving unit, for receiving the monochrome information of the corresponding viewing area controlling of each branch road of constant-current drive circuit；
Duty ratio control unit, calculates each viewing area pair for the monochrome information according to each viewing area and maximum brightness value The the first pwm signal dutycycle answered；
Current control unit, exports corresponding for the first pwm signal dutycycle according to each viewing area and maximum current value Continuous current.
9. high power region light adjusting and controlling device according to claim 8 it is characterised in that described power computation module also If the duration being more than default rated power for general power is more than Preset Time, recalculate current general power,
Described adjustment module includes：
Updating block, if for current general power still above default rated power, according to current general power and default volume Determine power and the first pwm signal dutycycle of each viewing area is updated to the second pwm signal dutycycle；
Current regulation unit, for the perseverance being exported according to each branch road of described second pwm signal Duty ratio control constant-current drive circuit Stream equal current proportion declines.
10. a kind of television set is it is characterised in that include the high power region light modulation control as described in claim 6-9 any one Device processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610822419.4A CN106448570A (en) | 2016-09-14 | 2016-09-14 | High-power area dimming control method, control device and television |
| PCT/CN2017/071021 WO2018049777A1 (en) | 2016-09-14 | 2017-01-13 | High-power region-based dimming control method, control device and television |
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| CN201610822419.4A CN106448570A (en) | 2016-09-14 | 2016-09-14 | High-power area dimming control method, control device and television |
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Cited By (12)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240376A (en) * | 2017-07-07 | 2017-10-10 | 青岛海信电器股份有限公司 | Method for controlling backlight thereof, device and liquid crystal display |
| CN108267879A (en) * | 2018-02-11 | 2018-07-10 | 京东方科技集团股份有限公司 | A kind of liquid crystal display die set and display equipment |
| CN108364614A (en) * | 2018-02-08 | 2018-08-03 | 深圳创维－Rgb电子有限公司 | LED excess temperature protection methods, terminal and computer readable storage medium |
| TWI646517B (en) * | 2017-09-29 | 2019-01-01 | 晨星半導體股份有限公司 | Power control method and control device for backlight source of display device |
| CN109143076A (en) * | 2018-08-01 | 2019-01-04 | 安徽锐能科技有限公司 | The method of discharge power for regulating cell group |
| CN109785792A (en) * | 2017-11-10 | 2019-05-21 | 京东方科技集团股份有限公司 | The driving method and device of display panel, display device |
| CN110149749A (en) * | 2019-05-20 | 2019-08-20 | 上海光联照明有限公司 | A kind of LED lamp general power control system and method |
| CN111251825A (en) * | 2020-01-20 | 2020-06-09 | 广州华凌制冷设备有限公司 | Operation control method and device, external air conditioner and computer storage medium |
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| CN114023268A (en) * | 2021-10-11 | 2022-02-08 | 安徽康佳电子有限公司 | Backlight brightness adjusting method and computer readable storage medium |
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Citations (5)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201315148Y (en) * | 2008-11-14 | 2009-09-23 | 康佳集团股份有限公司 | Regional light emission control device of LED backlight sources for liquid crystal television |
| CN102203847A (en) * | 2008-10-10 | 2011-09-28 | 夏普株式会社 | Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device |
| US20120299977A1 (en) * | 2011-05-25 | 2012-11-29 | Mstar Semiconductor, Inc. | Display Control Circuit and Method Thereof |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
| CN105390096A (en) * | 2015-11-24 | 2016-03-09 | 深圳创维－Rgb电子有限公司 | Method and device for over-driving control of regional dimming |
Family Cites Families (1)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543024B (en) * | 2012-02-03 | 2014-04-02 | 福州瑞芯微电子有限公司 | Control circuit for dynamic backlight balance |
-
2016
- 2016-09-14 CN CN201610822419.4A patent/CN106448570A/en active Pending
-
2017
- 2017-01-13 WO PCT/CN2017/071021 patent/WO2018049777A1/en active Application Filing
Patent Citations (5)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102203847A (en) * | 2008-10-10 | 2011-09-28 | 夏普株式会社 | Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device |
| CN201315148Y (en) * | 2008-11-14 | 2009-09-23 | 康佳集团股份有限公司 | Regional light emission control device of LED backlight sources for liquid crystal television |
| US20120299977A1 (en) * | 2011-05-25 | 2012-11-29 | Mstar Semiconductor, Inc. | Display Control Circuit and Method Thereof |
| CN105390096A (en) * | 2015-11-24 | 2016-03-09 | 深圳创维－Rgb电子有限公司 | Method and device for over-driving control of regional dimming |
| CN105374323A (en) * | 2015-12-18 | 2016-03-02 | 深圳Tcl数字技术有限公司 | Dot matrix backlight source drive method, device and system |
Cited By (17)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240376A (en) * | 2017-07-07 | 2017-10-10 | 青岛海信电器股份有限公司 | Method for controlling backlight thereof, device and liquid crystal display |
| TWI646517B (en) * | 2017-09-29 | 2019-01-01 | 晨星半導體股份有限公司 | Power control method and control device for backlight source of display device |
| US10971052B2 (en) | 2017-11-10 | 2021-04-06 | Boe Technology Group Co., Ltd. | Driving method and driving device for display panel, and display device |
| CN109785792A (en) * | 2017-11-10 | 2019-05-21 | 京东方科技集团股份有限公司 | The driving method and device of display panel, display device |
| CN108364614A (en) * | 2018-02-08 | 2018-08-03 | 深圳创维－Rgb电子有限公司 | LED excess temperature protection methods, terminal and computer readable storage medium |
| CN108364614B (en) * | 2018-02-08 | 2019-12-27 | 深圳创维－Rgb电子有限公司 | LED over-temperature protection method, terminal and computer readable storage medium |
| CN108267879A (en) * | 2018-02-11 | 2018-07-10 | 京东方科技集团股份有限公司 | A kind of liquid crystal display die set and display equipment |
| CN108267879B (en) * | 2018-02-11 | 2021-02-02 | 京东方科技集团股份有限公司 | Liquid crystal display module and display device |
| CN109143076A (en) * | 2018-08-01 | 2019-01-04 | 安徽锐能科技有限公司 | The method of discharge power for regulating cell group |
| CN110149749A (en) * | 2019-05-20 | 2019-08-20 | 上海光联照明有限公司 | A kind of LED lamp general power control system and method |
| CN110149749B (en) * | 2019-05-20 | 2024-02-09 | 上海光联照明有限公司 | LED lamp total power control system and method |
| CN111251825A (en) * | 2020-01-20 | 2020-06-09 | 广州华凌制冷设备有限公司 | Operation control method and device, external air conditioner and computer storage medium |
| WO2022089191A1 (en) * | 2020-10-30 | 2022-05-05 | Oppo广东移动通信有限公司 | Backlight control method and apparatus, and electronic device, and computer readable storage medium |
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| CN117765844A (en) * | 2023-12-29 | 2024-03-26 | 深圳创维显示技术有限公司 | Backlight abnormality detection method, equipment and storage medium based on regional dimming |
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