CN107452305A - A kind of current sensing means detected for screen, system and method - Google Patents
- ️Fri Dec 08 2017
CN107452305A - A kind of current sensing means detected for screen, system and method - Google Patents
A kind of current sensing means detected for screen, system and method Download PDFInfo
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Publication number
- CN107452305A CN107452305A CN201710706480.7A CN201710706480A CN107452305A CN 107452305 A CN107452305 A CN 107452305A CN 201710706480 A CN201710706480 A CN 201710706480A CN 107452305 A CN107452305 A CN 107452305A Authority
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- China Prior art keywords
- screen
- measured
- current
- connection status
- determined Prior art date
- 2017-08-17 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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present embodiments relate to screen detection field, more particularly to a kind of current sensing means detected for screen, system and method, for accurately determining screen to be measured with the presence or absence of abnormal by simple method.Current sensing means for screen detection includes first interface, for being connected with screen to be measured；Second interface, for driving the driving mainboard of screen operation to be measured to be connected；Current detecting unit, for detecting the operating current of screen to be measured, operating current is current value of the screen to be measured when being run under driving mainboard driving.Because the present invention is implemented, current detecting unit, for detecting the operating current of screen to be measured, operating current is current value of the screen to be measured when being run under driving mainboard driving, therefore, the operating current of screen to be measured can be determined by current detecting unit, in this way, can accurately determine screen to be measured with the presence or absence of abnormal according to the operating current of screen to be measured.
Description
Technical field
The present embodiments relate to screen detection field, more particularly to a kind of current sensing means for screen detection. System and method.
Background technology
With the development of technology, the use of electronic product is more and more extensive.Liquid crystal display (Liquid in electronic product Crystal Display, abbreviation LCD) and touch-screen (Touch Panel, abbreviation TP) be the important man-machine interaction of electronic product Part；Using TP as inputting interface, LCD is as display interface.Such as：Mobile phone, flat board, notebook computer, intelligent TV set Deng electronics in inputting interface and display interface.However, each manufacturer faces huge production capacity demand, to TP and LCD Reality production process in, it is difficult to ensure that without defective products, if the TP of defective products and LCD are assembled on electronic product When, the resource on production line can be wasted, and may need to return factory's replacing, cause cost to increase, in order to ensure TP and LCD in group Yield during dress to TP and LCD, it is necessary to carry out preliminary selective mechanisms before assembling.
In the prior art, the detection to TP and LCD is typically artificial progress, and therefore, the result that can cause to detect is forbidden Really, or even the problem of some bad TP and LCD people can not identify.
The content of the invention
The embodiment of the present invention provides a kind of current sensing means detected for screen, system and method, to realize essence True determination screen to be measured is with the presence or absence of abnormal.
A kind of current sensing means for screen detection is provided in the embodiment of the present invention, including：First interface, for Screen connection to be measured；Second interface, for driving the driving mainboard of the screen operation to be measured to be connected；Current detecting unit, For detecting the operating current of the screen to be measured, the operating current is the screen to be measured under the driving mainboard driving Current value during operation.
Alternatively, the current sensing means for screen detection also includes：Insert detection unit；The insertion detection is single Member, it is connected respectively with the first interface and the second interface；For determining the first connection status and the second connection status；Institute State connection status of first connection status for the screen to be measured and the first interface；Second connection status is the drive Dynamic mainboard and the connection status of the second interface；Wherein, the connection status includes connection and is not connected with；The insertion detection Unit, also it is connected with the current detecting unit, for it is determined that first connection status and second connection status are equal During to connect, enabled instruction is sent to the current detecting unit；It is determined that first connection status or second connection When state is is not connected with, halt instruction is sent to the current detecting unit.
Alternatively, the current detecting unit includes：Power supply circuit and drive circuit, the power supply circuit and the driving Circuit is respectively positioned between the first interface and the second interface；The power supply circuit, for being provided to the screen to be measured Operating voltage, the operating voltage are the voltage on the power supply circuit；The drive circuit, for being carried to the screen to be measured For drive signal.
Alternatively, the power supply circuit includes resistance and the current determination unit positioned at the resistance both ends；The electric current Determining unit, for gathering the voltage at the resistance both ends, and treated according to determining the resistance of the voltage and the resistance Survey the operating current of screen.
Alternatively, the power supply circuit also includes：With the power switch control unit of the resistant series；The power supply is opened Control unit is closed, is connected with the insertion detection unit；For receiving the startup of the insertion detection unit transmission During instruction, the power supply circuit is turned on；When receiving the halt instruction that the insertion detection unit is sent, the power supply is disconnected Circuit.
Alternatively, the drive circuit also includes：Control signal control unit；The control signal control unit, with institute State insertion detection unit connection；For when receiving the enabled instruction that the insertion detection unit is sent, described in conducting Drive circuit；When receiving the halt instruction that the insertion detection unit is sent, the drive circuit is disconnected.
Alternatively, the current sensing means for screen detection also includes：3rd interface, connect with the current determination unit Connect；The operating current of the screen to be measured for the current determination unit to be determined is output to processor.
Alternatively, current sensing means also includes：State indication unit, it is connected with the insertion detection unit；For referring to Show connection status and the driving mainboard of the screen to be measured determined of insertion detection unit with the first interface With the connection status of the second interface.
Alternatively, the resistance of the resistance is less than resistance threshold.
A kind of system for screen detection is provided in the embodiment of the present invention, including：Current sensing means described above.
Alternatively, the system also includes：Processor, for judging the operating current of screen to be measured and the pass of predetermined current System；When the operating current for judging the screen to be measured meets predetermined current, the screen normal operation to be measured is determined；Judging When the operating current of the screen to be measured is unsatisfactory for predetermined current, the screen operation exception to be measured is determined.
A kind of electric current detecting method for screen detection is provided in the embodiment of the present invention, including：Connect screen to be measured；Even Connect the driving mainboard for driving the screen operation to be measured；The operating current of the screen to be measured is detected by current detecting unit, The operating current is the current value when screen to be measured is run under the driving mainboard driving.
Alternatively, before the operating current that the screen to be measured is detected by current detecting unit, in addition to：It is determined that Connect the first connection status of the screen to be measured；It is determined that the second connection status of the connection driving mainboard；Wherein, the company Connecing state includes connection and is not connected with；When it is determined that first connection status and second connection status are connection, lead to Excessive current detection unit detects the operating current of the screen to be measured；It is determined that first connection status or second connection When state is is not connected with, stop the operating current that the current detecting unit detects the screen to be measured.
Alternatively, the current detecting unit includes power supply circuit and drive circuit；It is described to be examined by current detecting unit Survey before the operating current of the screen to be measured, in addition to：By the power supply circuit work electricity is provided to the screen to be measured Pressure, the operating voltage are the voltage on the power supply circuit；By the drive circuit driving is provided to the screen to be measured Signal.
Alternatively, the drive circuit includes resistance；The work that the screen to be measured is detected by current detecting unit Make electric current, including：The voltage at the resistance both ends is gathered, and is determined according to the resistance of the voltage and the resistance described to be measured The operating current of screen.
Alternatively, it is described after it is determined that first connection status and second connection status be connection, it is described Before operating voltage being provided by the power supply circuit to the screen to be measured, in addition to：Turn on the power supply circuit；It is determined that First connection status or second connection status for after not connected, it is described by the power supply circuit to described to be measured Before screen provides operating voltage, in addition to：Disconnect the power supply circuit.
Alternatively, it is described after it is determined that first connection status and second connection status be connection, it is described Before drive signal being provided by the drive circuit to the screen to be measured, in addition to：Turn on the drive circuit；It is determined that First connection status or second connection status for after not connected, it is described by the drive circuit to described to be measured Before screen provides drive signal, in addition to：Disconnect the drive circuit.
Alternatively, after the operating current that the screen to be measured is detected by current detecting unit, in addition to：Will be true The operating current output for the screen to be measured made；The operating current of the screen to be measured is used to be compared with predetermined current Compared with；When the operating current for judging the screen to be measured meets predetermined current, the screen normal operation to be measured is determined；Judging When the operating current of the screen to be measured is unsatisfactory for predetermined current, the screen operation exception to be measured is determined.
Alternatively, after first connection status for determining the connection screen to be measured, in addition to：Indicate what is determined First connection status；After second connection status for determining the connection driving mainboard, in addition to：Instruction is determined Second connection status.
Alternatively, the resistance of the resistance is less than resistance threshold.
Because the present invention is implemented, current detecting unit, for detecting the operating current of the screen to be measured, the work electricity The current value that stream is the screen to be measured when being run under the driving mainboard driving, therefore, can be with by current detecting unit The operating current of screen to be measured is determined, in this way, can accurately be determined according to the operating current of the screen to be measured to be measured Screen is with the presence or absence of abnormal.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment Accompanying drawing is briefly introduced.
Fig. 1 is a kind of structural representation of current sensing means for screen detection provided in an embodiment of the present invention；
Fig. 2 is the structural representation of another current sensing means for being used for screen detection provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of current detecting unit provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another current sensing means for being used for screen detection provided in an embodiment of the present invention；
Fig. 5 is a kind of electric current detecting method schematic flow sheet for screen detection provided in an embodiment of the present invention.
Embodiment
In order that the purpose of the present invention, technical scheme and beneficial effect are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining this hair It is bright, it is not intended to limit the present invention.
Fig. 1 illustrates to be shown using a kind of structure of current sensing means for screen detection of the embodiment of the present invention It is intended to, as shown in figure 1, the current sensing means 10 for screen detection includes：First interface 11, for connecting with screen 20 to be measured Connect；Second interface 12, for driving the driving mainboard 30 of the screen operation to be measured to be connected；Current detecting unit 13, is used for The operating current of the screen to be measured is detected, the operating current is that the screen to be measured is run under the driving mainboard driving When current value.
Due in the embodiment of the present invention, current detecting unit, for detecting the operating current of the screen to be measured, the work It is the current value when screen to be measured is run under the driving mainboard driving as electric current, therefore, passes through current detecting unit The operating current of screen to be measured can be determined, in this way, can accurately be determined according to the operating current of the screen to be measured Screen to be measured is with the presence or absence of abnormal.
Screen to be measured in the embodiment of the present invention includes touch-screen (Touch Panel, abbreviation TP) or display screen, touch-screen Also known as contact panel, it is the screen that one kind can receive contact (finger or glue nib etc.) input signal.In the embodiment of the present invention, When first interface is connected with screen to be measured, can first make screen interface to be measured corresponding to flexible PCB, pass through flexible circuit The screen to be measured is connected by plate with first interface, directly can also be made as first interface and screen interface identical to be measured Interface；Equally, when second interface is connected with driving mainboard, flexible PCB corresponding with driving mainboard can also be first made, is led to Crossing flexible PCB will drive mainboard to be connected with second interface, and directly second interface can also be made as with driving mainboard interface Identical interface；First interface and second interface are specifically set according to the demand of reality, and first interface and second interface can be Identical interface, or the interface differed.
For protective current detection means in the embodiment of the present invention, it is not damaged by, generally pacifies current sensing means On test fixture, it is easy to the detection of the electric current to screen to be measured.
Fig. 2 illustrates the structure using another current sensing means for being used for screen detection of the embodiment of the present invention Schematic diagram, as shown in Fig. 2 the current sensing means 10 for screen detection also includes：Insert detection unit 14；The insertion inspection Unit 14 is surveyed, is connected 12 with the first interface 11 and the second interface respectively；For determining the first connection status and second Connection status；First connection status is the connection status of the screen to be measured and the first interface；Second connection State is the driving mainboard and the connection status of the second interface；Wherein, the connection status includes connection and is not connected with； The insertion detection unit 14, is also connected with the current detecting unit 13, for it is determined that first connection status and institute When to state the second connection status be connection, enabled instruction is sent to the current detecting unit；It is determined that the first connection shape When state or second connection status is are not connected with, halt instruction is sent to the current detecting unit.
In the embodiment of the present invention, insertion detection unit sends enabled instruction or halt instruction to current detecting unit, can In a manner of the transmission level signal passed through, such as, preset high level and represent that enabled instruction, low level represent halt instruction；Or Person's low level represents that enabled instruction, high level represent halt instruction.Arranged according to insertion detection unit with current detecting unit Transmit the instruction that level represents；After the level signal that current detecting unit receives insertion detection unit transmission, it is determined that being to open Dynamic instruction is still forbidden instructing.
In order to further illustrate the structure of current detecting unit, Fig. 3 illustrates a kind of using the embodiment of the present invention The structural representation of current detecting unit, as shown in figure 3, the current detecting unit 13 includes：Power supply circuit 131 and driving electricity Road 132, the power supply circuit and the drive circuit are respectively positioned between the first interface 11 and the second interface 12；It is described Power supply circuit, for providing operating voltage to the screen to be measured, the operating voltage is the voltage on the power supply circuit；Institute Drive circuit is stated, for providing drive signal to the screen to be measured.In the embodiment of the present invention, the drive signal in driving current Determined according to specific test scene, test scene includes white picture, black picture, colour picture etc..
As shown in figure 3, the power supply circuit 131 includes resistance 1311 and the current determination unit positioned at the resistance both ends 1312；The current determination unit, for gathering the voltage at the resistance both ends, and according to the resistance of the voltage and the resistance Value determines the operating current of the screen to be measured.The power supply circuit 131 also includes：The power supply connected with the resistance 1311 is opened Close control unit 1313；The power switch control unit 1313, it is connected with the insertion detection unit 13；For receiving During the enabled instruction that the insertion detection unit is sent, the power supply circuit is turned on；Receiving, the insertion detection is single During the halt instruction that member is sent, the power supply circuit is disconnected.Alternatively, the resistance of the resistance is less than resistance threshold.Wherein, supply Resistance on circuit is the high-precision resistance of low resistance, and in the case where voltage is certain, the precision of resistance is higher, measures Electric current precision it is higher.Current determination unit can be by the analog-digital converter (Analog-to- with enlarging function Digital Converter, abbreviation ADC) converter ic (integrated circuit, abbreviation IC) composition, can be with The voltage at resistance both ends is obtained, and ohmically electric current is determined according to voltage.
In the embodiment of the present invention, multiple power supplies switch control unit is designed with.Multiple power supplies switch control unit is according to tool Which road break-make is the testing requirement of body determine；The embodiment of the present invention includes 12 road power switch control units；Due to screen to be measured Required operating voltage under different operating conditions is different, such as, required electricity when display screen is communicated with CPU Press as 1.8 volts, it is 3.0V to light voltage required during the pixel on display screen, therefore, work of the screen under different scenes The voltage of work is different, it is necessary to which the voltage of the power supply circuit of conducting is different, therefore, it is necessary to closes in multiple power supplies switch control unit All the way or multichannel realizes that screen works under default scene.
As shown in figure 3, the drive circuit 132 also includes：Control signal control unit 1321；The control signal control Unit, it is connected with the insertion detection unit 13；For receiving the enabled instruction of the insertion detection unit transmission When, turn on the drive circuit；When receiving the halt instruction that the insertion detection unit is sent, the driving is disconnected Circuit.
In the embodiment of the present invention, control signal control unit is used for on-state drive circuit so that screen display is default defeated Go out signal, and then detect the operating current of corresponding output signal sub-screen.Wherein, control signal includes data signal, sequential is believed Number etc.；For example, it is necessary to detect operating current of the display screen under black scenes, then close control letter corresponding to corresponding black scenes The switch of number output line, it is that display screen shows black picture, and then the operating current tested under display screen black picture, it is optional Ground, inventive embodiments include 6 tunnel control signals.
In the embodiment of the present invention, when power switch control unit turns on power supply circuit, driving mainboard provides screen for screen Operating voltage needed for work；After control signal control unit turns on drive circuit, the corresponding control of control signal wire output Signal so that display screen shows default picture；(such as black, white, blue picture).
Fig. 4 illustrates the structure using another current sensing means for being used for screen detection of the embodiment of the present invention Schematic diagram, as shown in figure 4, the current sensing means 10 for screen detection includes first interface 11, second interface 12, electricity Flow detection unit 13, insertion detection unit 14, the 3rd interface 15, state indication unit 16.Wherein, current detecting unit includes supplying Circuit 131 and drive circuit 132；Wherein, it is true to include power switch control unit 1313, resistance 1311, electric current for power supply circuit Order member 1312.Drive circuit bag 132 includes control information control unit 1321；3rd interface 15 and the current determination unit 1312 connections；The operating current of the screen to be measured for the current determination unit to be determined is output to processor 40. State indication unit 16, it is connected with the insertion detection unit 13；For indicate it is described insertion detection unit determine described in Screen to be measured and the connection status of the first interface and the driving mainboard and the connection status of the second interface.It is optional Ground, state indication unit can be the indicator lamps of different colours, connection and the driving of the screen to be measured with the first interface When mainboard is connected with the second interface, green indicating lamp is bright；Screen to be measured is not connected to the first interface and the driving Red led is bright when mainboard is not connected to the second interface, wherein, any one when being not connected to, yellow indicator lamp is bright.The One interface 11 is used to be connected with screen 20 to be measured, and second interface 12 is connected with driving mainboard 30；The annexation of other structures and Effect is identical with the annexation in Fig. 1, Fig. 2, Fig. 3 and effect；It will not be repeated here.
Alternatively, the instruction transmitted level and represented arranged according to insertion detection unit with current detecting unit；In electric current After detection unit receives the level signal of insertion detection unit transmission, it is determined that being enabled instruction or forbidding instructing.In order to just In the operating current for testing screen to be measured, tester, which at processor end to current detecting unit sends one and starts test, to be referred to Order, current detecting unit start test instruction what the enabled instruction and processor end for receiving insertion detection power supply transmission were sent Afterwards, current detecting unit starts work, in this way, tester can be enabled quickly to determine screen to be measured under corresponding scene Operating current；When needing current sensing means to forbid work, processor sends be stopped instruction or an insertion inspection Survey unit and send and forbid instructing, current sensing means receives any one, then forbids the work of current sensing means., in this way, Can protective current detection means as far as possible be not damaged by.
Alternatively, first interface, second interface and the 3rd interface can make unified interface in the embodiment of the present invention；Can Interface is set according to the actual requirements.
The present invention provides a kind of system for screen detection in implementing, the system includes being used for screen detection Current sensing means and processor, wherein, processor is used to judge the operating current of screen to be measured and the relation of predetermined current； When judging that the operating current of the screen to be measured meets predetermined current, the screen normal operation to be measured is determined；Described in judgement When the operating current of screen to be measured is unsatisfactory for predetermined current, the screen operation exception to be measured is determined.
In the embodiment of the present invention, screen is different in the required operating voltage of different conditions of work, such as, display screen with Required voltage is 1.8 volts when CPU is communicated, and it is 3.0V to light voltage required during the pixel on display screen, not Under same operating voltage, the operating current of display screen also differs.Screen to be measured under special scenes has been preset within a processor Running current, i.e. predetermined current, by it is actually detected to screen operating current compared with predetermined current, to determine Whether the screen is normal.
Alternatively, processor can integrate with current sensing means, can also be integrated separately and be filled in current detecting Put in outer terminal.
Processor can be central processing unit (central processing unit, abbreviation CPU), network processing unit (network processor, abbreviation NP) or CPU and NP combination.Processor can further include hardware chip.On It can be application specific integrated circuit (application-specific integrated circuit, abbreviation to state hardware chip ASIC), PLD (programmable logic device, abbreviation PLD) or its combination.Above-mentioned PLD can be CPLD (complex programmable logic device, abbreviation CPLD), field programmable logic Gate array (field-programmable gate array, abbreviation FPGA), GAL (generic array Logic, abbreviation GAL) or its any combination.
Processor is installed on terminal device, can be through wireless access network (Radio Access Network, abbreviation RAN) Communicated with one or more core nets, terminal device can refer to user equipment (User Equipment, abbreviation UE), access Terminal, subscriber unit, subscriber station, movement station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, nothing Line communication equipment, user agent or user's set.Access terminal can be cell phone, wireless phone, session initiation protocol (Session Initiation Protocol, abbreviation SIP) phone, WLL (Wireless Local Loop, letter Claim WLL) stand, personal digital assistant (Personal Digital Assistant, abbreviation PDA), with radio communication function Handheld device, computing device are connected to other processing equipments of radio modem, mobile unit, wearable device, not Terminal device come in 5G networks etc..
It can be seen from the above：Current detecting unit, for detecting the operating current of the screen to be measured, the work It is the current value when screen to be measured is run under the driving mainboard driving as electric current, therefore, passes through current detecting unit The operating current of screen to be measured can be determined, in this way, can accurately be determined according to the operating current of the screen to be measured Screen to be measured is with the presence or absence of abnormal.
Based on the system architecture shown in Fig. 1 to Fig. 4, Fig. 5 illustrates one kind provided in an embodiment of the present invention and is used for Screen detection electric current detecting method schematic flow sheet, as shown in figure 5, this be used for screen detection electric current detecting method include with Lower step：
Step 501, screen to be measured is connected；
Step 502, the driving mainboard of the connection driving screen operation to be measured；
Step 503, the operating current of the screen to be measured is detected by current detecting unit, the operating current is described Current value when screen to be measured is run under the driving mainboard driving.
Due in the embodiment of the present invention, current detecting unit, for detecting the operating current of the screen to be measured, the work It is the current value when screen to be measured is run under the driving mainboard driving as electric current, therefore, passes through current detecting unit The operating current of screen to be measured can be determined, in this way, can accurately be determined according to the operating current of the screen to be measured Screen to be measured is with the presence or absence of abnormal.
Screen to be measured in inventive embodiments includes touch-screen (Touch Panel, abbreviation TP) or display screen, and touch-screen is again Referred to as contact panel, it is the screen that one kind can receive contact (finger or glue nib etc.) input signal.
In the embodiment of the present invention, before the operating current that the screen to be measured is detected by current detecting unit, in addition to： It is determined that the first connection status of the connection screen to be measured；It is determined that the second connection status of the connection driving mainboard；Wherein, institute Stating connection status includes connection and is not connected with；It is determined that first connection status and second connection status are connection When, the operating current of the screen to be measured is detected by current detecting unit；It is determined that first connection status or described When two connection status is are not connected with, stop the operating current that the current detecting unit detects the screen to be measured.
Alternatively, after first connection status for determining the connection screen to be measured, in addition to：Indicate what is determined First connection status；After second connection status for determining the connection driving mainboard, in addition to：Instruction is determined Second connection status.
It is alternatively possible to connection status is indicated by the indicator lamp of different colours, such as, screen to be measured connects with described first Mouthful connection and driving mainboard when being connected with the second interface, green indicating lamp is bright；Screen to be measured connects with described first Red led is bright when mouth is not connected to and the driving mainboard is not connected to the second interface, wherein, any one is not connected to When, yellow indicator lamp is bright.
Alternatively, the current detecting unit includes power supply circuit and drive circuit；It is described to be examined by current detecting unit Survey before the operating current of the screen to be measured, in addition to：By the power supply circuit work electricity is provided to the screen to be measured Pressure, the operating voltage are the voltage on the power supply circuit；By the drive circuit driving is provided to the screen to be measured Signal.
Alternatively, it is described after it is determined that first connection status and second connection status be connection, it is described Before operating voltage being provided by the power supply circuit to the screen to be measured, in addition to：Turn on the power supply circuit；It is determined that First connection status or second connection status for after not connected, it is described by the power supply circuit to described to be measured Before screen provides operating voltage, in addition to：Disconnect the power supply circuit.
Alternatively, it is described after it is determined that first connection status and second connection status be connection, it is described Before drive signal being provided by the drive circuit to the screen to be measured, in addition to：Turn on the drive circuit；It is determined that First connection status or second connection status for after not connected, it is described by the drive circuit to described to be measured Before screen provides drive signal, in addition to：Disconnect the drive circuit.
In the embodiment of the present invention, control signal control unit is used for on-state drive circuit so that screen display is default defeated Go out signal, and then detect the operating current of corresponding output signal sub-screen.For example, it is necessary to display screen is detected under black scenes Operating current, then the switch of control signal output line corresponding to corresponding black scenes is closed, be that display screen shows black picture, enter And the operating current tested under display screen black picture.
Alternatively, the drive circuit includes resistance；The work that the screen to be measured is detected by current detecting unit Make electric current, including：The voltage at the resistance both ends is gathered, and is determined according to the resistance of the voltage and the resistance described to be measured The operating current of screen.
Alternatively, the resistance of the resistance is less than resistance threshold.Wherein, the resistance on power supply circuit is a low resistance height The resistance of precision, in the case where voltage is certain, the precision of resistance is higher, and the precision for the electric current measured is higher.
Alternatively, after the operating current that the screen to be measured is detected by current detecting unit, in addition to：Will be true The operating current output for the screen to be measured made；The operating current of the screen to be measured is used to be compared with predetermined current Compared with；When the operating current for judging the screen to be measured meets predetermined current, the screen normal operation to be measured is determined；Judging When the operating current of the screen to be measured is unsatisfactory for predetermined current, the screen operation exception to be measured is determined.
It can be seen from the above：Current detecting unit, for detecting the operating current of the screen to be measured, the work It is the current value when screen to be measured is run under the driving mainboard driving as electric current, therefore, passes through current detecting unit The operating current of screen to be measured can be determined, in this way, can accurately be determined according to the operating current of the screen to be measured Screen to be measured is with the presence or absence of abnormal.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method or computer program product. Therefore, the present invention can be using the embodiment in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Form.Deposited moreover, the present invention can use to can use in one or more computers for wherein including computer usable program code The shape for the computer program product that storage media is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) Formula.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the model of various changes and modification without departing from the present invention to the present invention Enclose.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then The present invention is also intended to comprising including these changes and modification.
Claims (20)
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A kind of 1. current sensing means for screen detection, it is characterised in that including：
First interface, for being connected with screen to be measured；
Second interface, for driving the driving mainboard of the screen operation to be measured to be connected；
Current detecting unit, for detecting the operating current of the screen to be measured, the operating current is that the screen to be measured exists Current value when being run under the driving mainboard driving.
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2. current sensing means as claimed in claim 1, it is characterised in that also include：Insert detection unit；
The insertion detection unit, is connected with the first interface and the second interface respectively；For determining the first connection shape State and the second connection status；First connection status is the connection status of the screen to be measured and the first interface；It is described Second connection status is the driving mainboard and the connection status of the second interface；Wherein, the connection status includes connection With it is not connected；
The insertion detection unit, is also connected with the current detecting unit, for it is determined that first connection status and institute When to state the second connection status be connection, enabled instruction is sent to the current detecting unit；It is determined that the first connection shape When state or second connection status is are not connected with, halt instruction is sent to the current detecting unit.
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3. current sensing means as claimed in claim 2, it is characterised in that the current detecting unit includes：Power supply circuit And drive circuit, the power supply circuit and the drive circuit are respectively positioned between the first interface and the second interface；
The power supply circuit, for providing operating voltage to the screen to be measured, the operating voltage is on the power supply circuit Voltage；
The drive circuit, for providing drive signal to the screen to be measured.
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4. current sensing means as claimed in claim 3, it is characterised in that the power supply circuit includes resistance and positioned at described The current determination unit at resistance both ends；
The current determination unit, for gathering the voltage at the resistance both ends, and according to the resistance of the voltage and the resistance Value determines the operating current of the screen to be measured.
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5. current sensing means as claimed in claim 4, it is characterised in that the power supply circuit also includes：With the resistance The power switch control unit of series connection；
The power switch control unit, it is connected with the insertion detection unit；For receiving the insertion detection unit During the enabled instruction sent, the power supply circuit is turned on；Receiving the halt instruction of the insertion detection unit transmission When, disconnect the power supply circuit.
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6. current sensing means as claimed in claim 3, it is characterised in that the drive circuit also includes：Control signal control Unit processed；
The control signal control unit, it is connected with the insertion detection unit；For receiving the insertion detection unit During the enabled instruction sent, the drive circuit is turned on；Receiving the stopping of the insertion detection unit transmission During instruction, the drive circuit is disconnected.
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7. current sensing means as claimed in claim 4, it is characterised in that also include：
3rd interface, it is connected with the current determination unit；For the screen to be measured for determining the current determination unit The operating current of curtain is output to processor.
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8. current sensing means as claimed in claim 2, it is characterised in that also include：
State indication unit, it is connected with the insertion detection unit；For indicate it is described insertion detection unit determine described in Screen to be measured and the connection status of the first interface and the driving mainboard and the connection status of the second interface.
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9. current sensing means as claimed in claim 4, it is characterised in that the resistance of the resistance is less than resistance threshold.
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A kind of 10. system for screen detection, it is characterised in that including：Electricity described in any one of the claims 1 to 10 Flow detection device.
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11. system as claimed in claim 10, it is characterised in that also include：
Processor, for judging the operating current of screen to be measured and the relation of predetermined current；Judging the work of the screen to be measured When meeting predetermined current as electric current, the screen normal operation to be measured is determined；Judging the operating current of the screen to be measured not When meeting predetermined current, the screen operation exception to be measured is determined.
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A kind of 12. electric current detecting method for screen detection, it is characterised in that including：
Connect screen to be measured；The driving mainboard of the connection driving screen operation to be measured；
The operating current of the screen to be measured is detected by current detecting unit, the operating current is the screen to be measured in institute State the current value when driving of driving mainboard is lower to be run.
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13. electric current detecting method as claimed in claim 12, it is characterised in that it is described detected by current detecting unit described in Before the operating current of screen to be measured, in addition to：
It is determined that the first connection status of the connection screen to be measured；It is determined that the second connection status of the connection driving mainboard；Its In, the connection status includes connection and is not connected with；
When it is determined that first connection status and second connection status are connection, institute is detected by current detecting unit State the operating current of screen to be measured；
When it is determined that first connection status or second connection status is are not connected with, stop the current detecting unit inspection Survey the operating current of the screen to be measured.
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14. electric current detecting method as claimed in claim 13, it is characterised in that the current detecting unit includes power supply circuit And drive circuit；
Before the operating current that the screen to be measured is detected by current detecting unit, in addition to：
Operating voltage is provided to the screen to be measured by the power supply circuit, the operating voltage is on the power supply circuit Voltage；
By the drive circuit drive signal is provided to the screen to be measured.
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15. electric current detecting method as claimed in claim 14, it is characterised in that the drive circuit includes resistance；
The operating current that the screen to be measured is detected by current detecting unit, including：
The voltage at the resistance both ends is gathered, and the work of the screen to be measured is determined according to the resistance of the voltage and the resistance Make electric current.
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16. electric current detecting method as claimed in claim 15, it is characterised in that it is described it is determined that first connection status and After second connection status is connection, it is described by the power supply circuit to the screen to be measured provide operating voltage it Before, in addition to：Turn on the power supply circuit；
It is determined that first connection status or second connection status for after not connected, it is described to pass through the power supply circuit Before operating voltage being provided to the screen to be measured, in addition to：Disconnect the power supply circuit.
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17. electric current detecting method as claimed in claim 14, it is characterised in that it is described it is determined that first connection status and After second connection status is connection, it is described by the drive circuit to the screen to be measured provide drive signal it Before, in addition to：Turn on the drive circuit；
It is determined that first connection status or second connection status for after not connected, it is described to pass through the drive circuit Before drive signal being provided to the screen to be measured, in addition to：Disconnect the drive circuit.
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18. electric current detecting method as claimed in claim 15, it is characterised in that it is described detected by current detecting unit described in After the operating current of screen to be measured, in addition to：
The operating current for the screen to be measured determined is exported；The operating current of the screen to be measured is used for and predetermined current It is compared；When the operating current for judging the screen to be measured meets predetermined current, the screen normal operation to be measured is determined； When the operating current for judging the screen to be measured is unsatisfactory for predetermined current, the screen operation exception to be measured is determined.
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19. electric current detecting method as claimed in claim 13, it is characterised in that described to determine to connect the of the screen to be measured After one connection status, in addition to：
Indicate first connection status determined；
After second connection status for determining the connection driving mainboard, in addition to：
Indicate second connection status determined.
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20. electric current detecting method as claimed in claim 15, it is characterised in that the resistance of the resistance is less than resistance threshold.
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| CN201710706480.7A CN107452305B (en) | 2017-08-17 | 2017-08-17 | Current detection device, system and method for screen detection |
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| CN201710706480.7A CN107452305B (en) | 2017-08-17 | 2017-08-17 | Current detection device, system and method for screen detection |
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