CN102788294A - Display device, backlight device and backlight source control method - Google Patents
- ️Wed Nov 21 2012
CN102788294A - Display device, backlight device and backlight source control method - Google Patents
Display device, backlight device and backlight source control method Download PDFInfo
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Publication number
- CN102788294A CN102788294A CN2012101806069A CN201210180606A CN102788294A CN 102788294 A CN102788294 A CN 102788294A CN 2012101806069 A CN2012101806069 A CN 2012101806069A CN 201210180606 A CN201210180606 A CN 201210180606A CN 102788294 A CN102788294 A CN 102788294A Authority
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- China Prior art keywords
- frequency
- back light
- signal
- synchronization signal
- module Prior art date
- 2012-06-04 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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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display device, a backlight device and a backlight source control method. The display device comprises a liquid crystal display module, a backlight source module, a backlight frequency generation module and a microprocessor, wherein the backlight source module is provided with a backlight source and a switch and coupled with the liquid crystal display module; the backlight frequency generation module generates a backlight source control frequency signal according to a frame synchronous signal; and the frequency of the frame synchronous signal is proportional to the frequency of the backlight source control frequency signal; the microprocessor controls the changing-over of the switch according to the backlight source control frequency signal; and the changing-over frequency of the switch depends on the frequency of the backlight source control frequency signal. The backlight device can achieve a black frame insertion technology or reduce flickering without additionally increasing the hardware cost.
Description
Technical field
The present invention discloses a kind of back lighting device, display unit and back light control method, refers to back lighting device, the display unit that comprise this back lighting device and this back lighting device employed back light control method of a kind of increase back light controlled frequency with simulation black plug (Black Frame Insertion) effect especially.
Background technology
The general employed black insertion technology of display floater is to insert complete black frame between the frame of picture (Frame) and reach comprising mostly.In addition, black insertion technology also can be when improving between the frame that the observer comprising picture conversion in the mode of the module scanning backlight backlight that uses many fluorescent tubes on the display floater the visual fuzzy ghost (Blur) that arrives.Yet, no matter be to implement black insertion technology, all can significantly improve the cost when making display floater, and be unfavorable for the mass production of display floater with above-mentioned any method.
Summary of the invention
Therefore, one of the object of the invention is to provide a kind of back lighting device, display unit and back light control method, to reduce the cost of making the display floater that can implement black insertion technology.
The back lighting device that the present invention disclosed comprises the back light module, frequency backlight produces module and microprocessor.This back light module has back light and switch.This switch is used for switching the opening and closing of this back light.This back light is coupled to this liquid crystal display module.This frequency backlight produces module and is used for producing back light controlled frequency signal according to this picture synchronization signal.The proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal.This microprocessor is used for according to the switching of this this switch of back light controlled frequency signal controlling.The frequency that this switch is switched is by the frequency decision of this back light controlled frequency signal.
In an embodiment, this picture synchronization signal is vertical synchronizing signal or horizontal-drive signal.
In another embodiment, the frequency of this back light controlled frequency signal is less than the frequency of this picture synchronization signal.
In a specific embodiment, this frequency backlight produces module and comprises the phase-locked loop, and this phase-locked loop is used to receive this picture synchronization signal; And frequency eliminator, this frequency eliminator is coupled to this phase-locked loop, and produces this back light controlled frequency signal according to this picture synchronization signal.
In a preferred embodiment, this display unit also comprises control module, and this control module is used for adjusting the frequency of this picture synchronization signal, and exports this picture synchronization signal.
The display unit that the present invention disclosed comprises the liquid crystal display module and like any described back lighting device among the claim 1-5, and this back light is coupled to this liquid crystal display module.。
Disclose in the back light control method that is applied to back lighting device in the present invention, this back lighting device comprises the back light module, and this back light module has back light and switch, and this switch is used for switching the opening and closing of this back light.This back light control method that the present invention disclosed comprises according to picture synchronization signal generation back light controlled frequency signal, the proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal; And according to the switching of this this switch of back light controlled frequency signal controlling, wherein the frequency switched of this switch is by the frequency decision of this back light controlled frequency signal.
In an embodiment, this method also comprises the frequency of adjusting this picture synchronization signal; And this picture synchronization signal of output.
In a specific embodiment, this picture synchronization signal is vertical synchronizing signal or horizontal-drive signal.
In a preferred embodiment, the frequency of this back light controlled frequency signal is less than the frequency of this picture synchronization signal.
The back light control method that the present invention has disclosed a kind of back lighting device, used the display unit of this back lighting device and be applied to this back lighting device; Compared with prior art; The present invention can make back lighting device under the prerequisite of not extra increase hardware cost, realizes black insertion technology.
Description of drawings
Fig. 1 is the sketch map according to the back lighting device that one embodiment of the invention disclosed.
Fig. 2 by according to one embodiment of the invention exposure frequency backlight shown in Figure 1 produce the detailed maps of module.
Fig. 3 is according to one embodiment of the invention, uses the sketch map of the display unit of back lighting device shown in Figure 1.
Fig. 4 by according to one embodiment of the invention exposure be applied to the flow chart of the back light control method of back lighting device shown in Figure 1 or display unit shown in Figure 3.
[main element symbol description]
100 back lighting devices
110 frequencies backlight produce module
112 phase-locked loops
114 frequency eliminators
120 microprocessors
130 back light modules
132 back lights
134 switches
150 liquid crystal display modules
200 display unit
The specific embodiment
The display floater manufacturing cost that institute significantly increases when implementing black insertion technology in order to reduce, the present invention has disclosed a kind of back light controlled frequency that increases to simulate back lighting device, the display unit that comprises this back lighting device and the employed back light control method of this back lighting device of black plug effect.
For making the object of the invention, structure, characteristic and function thereof there are further understanding, cooperate embodiment to specify as follows now.
See also Fig. 1, it is the sketch map according to the
back lighting device100 that one embodiment of the invention disclosed.As shown in Figure 1,
back lighting device100 comprises frequency backlight and produces
module110,
microprocessor120, reaches back light module 130.
Back light module130 comprises
back light132 and
switch134.
Frequency backlight produces
module110 and is used for the picture synchronization signal that video-audio signal source according to external world's input comprised, and produces back light controlled frequency signal, and this back light controlled frequency signal is offered
microprocessor120; The proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal wherein.In one embodiment of this invention, the frequency of this back light controlled frequency signal reduces the generation of scintillation (Flicker) less than the frequency of this picture synchronization signal.And in another embodiment of the present invention, the frequency of this back light controlled frequency signal also can be greater than the frequency of this picture synchronization signal, and be this picture synchronization signal frequency positive integer doubly.
120 is used for the switching that comes
gauge tap134 according to back light controlled frequency signal, and
switch134 is used for controlling
back light132 and is being unlocked and is being closed the switching between two condition; In other words;
Microprocessor120 can be according to the back light frequency signal; Open or
close back light132 through
switch134; The frequency that makes
back light132 be unlocked is that direct frequency by back light controlled frequency signal decides, and can under the condition that does not increase hardware cost in addition, realize black insertion technology.In one embodiment of this invention, the frequency of this back light controlled frequency signal is adjusted into the frequency less than this picture synchronization signal, can avoids the generation of scintillation.And in another embodiment of the present invention, the frequency of this back light controlled frequency signal also can be adjusted to the frequency greater than this picture synchronization signal, and be this picture synchronization signal frequency positive integer doubly, look the occasion of various different application and decide.
See also Fig. 2, its by according to one embodiment of the invention exposure frequency backlight shown in Figure 1 produce the detailed maps of module 110.As shown in Figure 2, frequency backlight produces
module110 and comprises phase-locked loop (Pha se-locked Loop) 112 and frequency eliminator (Frequency Divider) 114.Proportionate relationship between the frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal can see through
frequency eliminator114 and directly control.By phase-locked
loop112 operate together, make the frequency that this picture synchronization signal produces and the proportional relation of frequency of this back light controlled frequency signal, under the situation of not extra increase hardware cost, to realize black insertion technology with
frequency eliminator114.
In other embodiments of the invention, can also implement
frequency generation module110 backlight by other hardware modules, and not receive the restriction of element shown in Figure 2.
In various embodiments of the present invention, this picture synchronization signal can be vertical synchronizing signal or horizontal-drive signal.
See also Fig. 3, it is according to one embodiment of the invention, uses the sketch map of the display unit 200 of
back lighting device100 shown in Figure 1.As shown in Figure 3, display unit 200 comprises back lighting device shown in Figure 1 100 and liquid crystal display module 150, and wherein liquid crystal display module 150 is coupled to
back light132.
See also Fig. 4, its by according to one embodiment of the invention exposure be applied to the flow chart of the back light control method of back lighting device shown in Figure 1 or display unit 200 shown in Figure 3.As shown in Figure 4, back light control method of the present invention comprises following steps:
Step 402: produce back light controlled frequency signal, the wherein proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal according to the picture synchronization signal.
Step 404: according to the switching of this this switch of back light controlled frequency signal controlling, wherein the frequency switched of this switch is by the frequency decision of this back light controlled frequency signal.
The various conditions with the above-mentioned mentioned mistake of this specification that note that are incorporated in the various embodiment that flow chart shown in Figure 4 is derived, and must be regarded as embodiments of the invention.
The back light control method that the present invention has disclosed the display unit of a kind of back lighting device, a kind of this back lighting device of application and has been applied to this back lighting device.Back light controlled frequency signal by produce proportional relation on the frequency according to the picture synchronization signal can make back lighting device under the prerequisite of not extra increase hardware cost, realizes black insertion technology.
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. back lighting device is characterized in that this back lighting device comprises:
The back light module, this back light module has back light and switch, and this switch is used for switching the opening and closing of this back light;
Frequency backlight produces module, and this frequency backlight produces module and produces back light controlled frequency signal, the proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal according to the picture synchronization signal; And
Microprocessor, this microprocessor are according to the switching of this this switch of back light controlled frequency signal controlling, and the frequency that this switch is switched is by the frequency decision of this back light controlled frequency signal.
2. back lighting device as claimed in claim 1 is characterized in that this picture synchronization signal is vertical synchronizing signal or horizontal-drive signal.
3. back lighting device as claimed in claim 1 is characterized in that the frequency of the frequency of this back light controlled frequency signal less than this picture synchronization signal.
4. back lighting device as claimed in claim 1 is characterized in that this frequency backlight produces module and comprises:
Phase-locked loop, this phase-locked loop are used to receive this picture synchronization signal; And
Frequency eliminator, this frequency eliminator is coupled to this phase-locked loop, and produces this back light controlled frequency signal according to this picture synchronization signal.
5. back lighting device as claimed in claim 1 is characterized in that this back lighting device also comprises control module, and this control module is used for adjusting the frequency of this picture synchronization signal, and exports this picture synchronization signal.
6. display unit is characterized in that this display unit comprises:
The liquid crystal display module; And
Like any described back lighting device among the claim 1-5, and this back light is coupled to this liquid crystal display module.
7. back light control method that is applied to back lighting device; This back lighting device comprises the back light module; This back light module has back light and switch, and this switch is used for switching the opening and closing of this back light, it is characterized in that this back light control method comprises:
Produce back light controlled frequency signal, the proportional relation of frequency of the frequency of this picture synchronization signal and this back light controlled frequency signal according to the picture synchronization signal; And
According to the switching of this this switch of back light controlled frequency signal controlling, wherein the frequency switched of this switch is by the frequency decision of this back light controlled frequency signal.
8. back light control method as claimed in claim 7 is characterized in that this method also comprises:
Adjust the frequency of this picture synchronization signal; And
Export this picture synchronization signal.
9. back light control method as claimed in claim 7 is characterized in that this picture synchronization signal is vertical synchronizing signal or horizontal-drive signal.
10. back light control method as claimed in claim 7 is characterized in that the frequency of the frequency of this back light controlled frequency signal less than this picture synchronization signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101806069A CN102788294A (en) | 2012-06-04 | 2012-06-04 | Display device, backlight device and backlight source control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101806069A CN102788294A (en) | 2012-06-04 | 2012-06-04 | Display device, backlight device and backlight source control method |
Publications (1)
| Publication Number | Publication Date |
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| CN102788294A true CN102788294A (en) | 2012-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012101806069A Pending CN102788294A (en) | 2012-06-04 | 2012-06-04 | Display device, backlight device and backlight source control method |
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| WO2014146308A1 (en) * | 2013-03-20 | 2014-09-25 | 深圳市华星光电技术有限公司 | Backlight drive board and liquid crystal display |
| WO2015066973A1 (en) * | 2013-11-06 | 2015-05-14 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight drive method therefor |
| CN107045851A (en) * | 2016-02-05 | 2017-08-15 | 大陆汽车电子(芜湖)有限公司 | Head-up display method for controlling backlight thereof based on SPI |
| CN109387978A (en) * | 2017-08-03 | 2019-02-26 | 苹果公司 | Local display back light system and method |
| CN110267414A (en) * | 2019-05-30 | 2019-09-20 | 苏州佳世达电通有限公司 | The display control method of display device and environment lamp |
| CN113593485A (en) * | 2021-07-27 | 2021-11-02 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
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| WO2014146308A1 (en) * | 2013-03-20 | 2014-09-25 | 深圳市华星光电技术有限公司 | Backlight drive board and liquid crystal display |
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| GB2524213B (en) * | 2013-03-20 | 2020-03-18 | Shenzhen China Star Optoelect | Backlight driving board and lcd device |
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| CN107045851A (en) * | 2016-02-05 | 2017-08-15 | 大陆汽车电子(芜湖)有限公司 | Head-up display method for controlling backlight thereof based on SPI |
| CN107045851B (en) * | 2016-02-05 | 2019-08-02 | 大陆汽车车身电子系统（芜湖）有限公司 | Head-up display method for controlling backlight thereof based on SPI |
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| US10555389B2 (en) | 2017-08-03 | 2020-02-04 | Apple Inc. | Local display backlighting systems and methods |
| CN110267414A (en) * | 2019-05-30 | 2019-09-20 | 苏州佳世达电通有限公司 | The display control method of display device and environment lamp |
| CN113593485A (en) * | 2021-07-27 | 2021-11-02 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN113593485B (en) * | 2021-07-27 | 2022-12-06 | Tcl华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 2012-11-21 | C06 | Publication | |
| 2012-11-21 | PB01 | Publication | |
| 2013-01-16 | C10 | Entry into substantive examination | |
| 2013-01-16 | SE01 | Entry into force of request for substantive examination | |
| 2015-04-22 | WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121121 |