CN107037299A - A kind of display screen start test circuit and device - Google Patents
A kind of display screen start test circuit and device Download PDFInfo
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- CN107037299A CN107037299A CN201710476242.1A CN201710476242A CN107037299A CN 107037299 A CN107037299 A CN 107037299A CN 201710476242 A CN201710476242 A CN 201710476242A CN 107037299 A CN107037299 A CN 107037299A
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- display screen
- timer
- shutting down
- switching
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
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- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Controls And Circuits For Display Device (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The present invention is applied to electronic applications there is provided a kind of display screen start test circuit and device, and the circuit includes：Photosensitive detection unit, judged by detecting after display screen start the white field signal that shows display screen to be measured whether normal boot-strap, and correspondence generates sense light detecting signal；Switching on and shutting down timing setting unit, sets switching on and shutting down time and the switch unit frequency of display screen to be measured, and correspondence generates periodic pulse signal；Logic control element, according to periodic pulse signal and photosensitive detection signal generation logic control signal；Switch control unit, according to logic control signal output switch control signal, to control the start power supply controlled end of display screen to be measured to start shooting.The present invention sets switching on and shutting down time and the frequency of display screen to be measured automatically, the break-make of control unit control start power supply boots up test, and can recognize display screen whether normal boot-strap, retain extremely live in black state, without artificial uninterrupted observation, manpower and materials are dramatically saves on.
Description
Technical field
The invention belongs to electronic applications, more particularly to a kind of display screen start test circuit and device.
Background technology
The equipment such as current TV, computer, hand-held intelligent terminal all show product by display screen as visual output
Feature, and in order to ensure display screen stability in use and reliability, it is necessary to be carried out before dispatching from the factory strict, big
The switching on and shutting down test of amount, switching on and shutting down test usually requires to open by tens thousand of secondary as an important indicator for considering overall performance
Test is closed, to detect that display screen whether there is quality problems.
However, the current general switch testing that display screen is carried out by manually, by manually controlling test to count, and
When detecting display screen exception, artificial control pause records and retracts Measuring error.
But, because the number of times that switching on and shutting down are tested is typically up to ten thousand times, therefore manpower is greatly caused using artificial control
The waste of cost, and also influence the testing efficiency of typical products in mass production.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of display screen start test circuit, it is intended to solve at present using artificial
Switching on and shutting down before control display screen is dispatched from the factory are tested, the problem of causing human cost waste and low batch testing efficiency.
The embodiment of the present invention is achieved in that a kind of display screen start test circuit, the start electricity with display screen to be measured
Source controlled end connection, the circuit includes：
Photosensitive detection unit, for being by detecting the white field signal shown after display screen start to judge display screen to be measured
No normal boot-strap, and correspondence generates sense light detecting signal；
Switching on and shutting down timing setting unit, switching on and shutting down time and switch unit frequency for setting display screen to be measured, and correspondingly
Generate periodic pulse signal；
Logic control element, for being believed according to the periodic pulse signal and the photosensitive detection signal generation logic control
Number, the first input end of the logic control element is connected with the output end of the switching on and shutting down timing setting unit, the logic
Second output end of control unit is connected with the output end of the photosensitive detection unit；
Switch control unit, it is described to be measured to control for according to the logic control signal output switch control signal
The start power supply controlled end start of display screen, the output end of the input of the switch control unit and the logic control element
Connection, the output end of the switch control unit is connected with the start power supply controlled end of the display screen to be measured.
The another object of the embodiment of the present invention is that there is provided a kind of display screen for test circuit of being started shooting including above-mentioned display screen
Start test device.
The embodiment of the present invention sets switching on and shutting down time and the switch of display screen to be measured by switching on and shutting down timing setting unit
Unit frequency, the break-make of start power supply is further controlled by logic control element and start control unit, test is booted up, and
By photosensitive detection unit recognize display screen whether normal boot-strap, without artificial uninterrupted observation, as long as complete machine can not
Brilliant white screen, the circuit automatically controls the test of shutdown switch machine, display screen is maintained at black state, exception is live to protect
Stay, so as to dramatically saves on manpower and materials.
Brief description of the drawings
Fig. 1 is the structure chart of display screen provided in an embodiment of the present invention start test circuit；
Fig. 2 is the example electricity of switching on and shutting down timing setting unit in display screen provided in an embodiment of the present invention start test circuit
Lu Tu.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
The embodiment of the present invention sets switching on and shutting down time and the switch of display screen to be measured by switching on and shutting down timing setting unit
Unit frequency, the break-make of start power supply is further controlled by logic control element and start control unit, test is booted up, and
By photosensitive detection unit recognize display screen whether normal boot-strap, without artificial uninterrupted observation, as long as complete machine can not
Brilliant white screen, the circuit automatically controls the test of shutdown switch machine, display screen is maintained at black state, exception is live to protect
Stay, so as to dramatically saves on manpower and materials.
Fig. 1 shows the structure of display screen start test circuit provided in an embodiment of the present invention, for convenience of description, only shows
Part related to the present invention is gone out.
It is used as one embodiment of the invention, display screen start test circuit, the start power supply controlled end with display screen to be measured
Connection, including：
Photosensitive detection unit 11, for judging display screen to be measured by detecting the white field signal shown after display screen start
Whether normal boot-strap, and correspondence generate sense light detecting signal；
Preferably, photosensitive detection unit 11 can be realized using photoinduction sensor.
Switching on and shutting down timing setting unit 12, switching on and shutting down time and switch unit frequency for setting display screen to be measured, and it is right
Periodic pulse signal should be generated；
Logic control element 13, for according to periodic pulse signal and photosensitive detection signal generation logic control signal, patrolling
The first input end of volume control unit 13 is connected with the output end of switching on and shutting down timing setting unit 12, and the of logic control element 13
Two output ends are connected with the output end of photosensitive detection unit 11；
Preferably, logic control element 13 can use with gate logic device, should first input end with gate logic device
It is the second defeated of logic control element 13 with the second input of gate logic device for the first input end of logic control element 13
Enter end, the output end with gate logic device is the output end of logic control element 13.
Switch control unit 14, for according to logic control signal output switch control signal, to control display screen to be measured
The start of start power supply controlled end, the input of switch control unit 14 is connected with the output end of logic control element 13, switch
The output end of control unit 14 is connected with the start power supply controlled end of display screen to be measured.
Preferably, switch control unit 14 can be realized using relay.
In said units, photosensitive detection unit 11, switching on and shutting down timing setting unit 12 and switch control unit 14 by
12V DC voltages are made to power as system power supply, and start power supply uses general 220V alternating currents.
In embodiments of the present invention, a conjunction is set to start power supply controlled end by switching on and shutting down timing setting unit 12
The energization of reason and powered-down time, it is ensured that the periodicity and uniformity of complete machine start and close.
After switch controlling signal is sent, the brightness on display screen is sensed by photosensitive detection unit 11, if display
Shield normal boot-strap, white field is shown automatically, now, photosensitive detection unit 11 can detect white field signal, then judge that display screen is normal
Start；If display screen can not normal boot-strap, display screen is shown as black, and now, photosensitive detection unit 11 can't detect white field
Signal, then judge that exception, output abnormality control signal occurs in display screen start, and no longer the display screen to be measured is proceeded out
Shutdown test.
In embodiments of the present invention, periodic pulse signal and sense light detecting signal are carried out generating logic control after logic judgment
Signal processed carrys out the adhesive turn-on cycle of control relay, and then controls the break-make of 220V start power supplys.
Its logic judgment truth table is as follows.
The periodic pulse signal that switching on and shutting down timing setting unit 12 is exported is classified as A, the sense that photosensitive detection unit 11 is generated
Light detecting signal is classified as B, and the switch controlling signal that switch control unit 14 is exported is classified as C, then：
A has two states：0, which represents timer, is output as low, and 1, which represents timer, is output as high level；
B has two states：0 to represent display screen feedback brightness relatively low, it is impossible to promotes photoinduction sensor conducts, 1 represent it is aobvious
Display screen shows white field, normal boot-strap；
Truth table listed above：
| A | B | C |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
As can be seen that be high level in periodic pulse signal, and photosensitive detection unit 11 is when detecting white field signal, opens
The control start power supply conducting of control unit 14 is closed, test is booted up.
The embodiment of the present invention sets switching on and shutting down time and the switch of display screen to be measured by switching on and shutting down timing setting unit
Unit frequency, the break-make of start power supply is further controlled by logic control element and start control unit, test is booted up, and
By photosensitive detection unit recognize display screen whether normal boot-strap, without artificial uninterrupted observation, as long as complete machine can not
Brilliant white screen, the circuit automatically controls the test of shutdown switch machine, display screen is maintained at black state, exception is live to protect
Stay, so as to dramatically saves on manpower and materials.
Fig. 2 shows showing for switching on and shutting down timing setting unit in display screen provided in an embodiment of the present invention start test circuit
Example circuit, for convenience of description, illustrate only part related to the present invention.
As one embodiment of the invention, the switching on and shutting down timing setting unit 12 includes：
Electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, resistance RA, resistance RB and fixed
When device 121；
2 pin of timer 121 are connected for the frequency selection end of switching on and shutting down timing setting unit 12 with 6 pin of timer 121,
6 pin of timer 121 are connected by resistance RB with 7 pin of timer 121, and 7 pin of timer 121 pass through resistance RA and timer
121 8 pin connection, 8 pin and 4 pin of timer 121 are all connected with the positive pole of system power supply, and 3 pin of timer 121 are fixed for switching on and shutting down
When setup unit 12 output end, the 1 pin ground connection of timer 121,5 pin of timer 121 are grounded by electric capacity C7,
Electric capacity C1 to electric capacity C6 one end are respectively multiple frequencies sorting end of switching on and shutting down timing setting unit 12, selectivity
It is connected with the selection end of switching on and shutting down timing setting unit 12.
Alternatively, timer 121 can use 555 timers or 7555 timers.
555 timers are the medium-scale integration devices that a kind of analog- and digital- function phase is combined, typically with ambipolar (TTL)
What technique made is referred to as 555, the power supply for being referred to as 7555, the 555 timers electricity made of CMOS (CMOS) technique
Press scope wide, can be worked in 4.5V~16V, it is internal including two voltage comparators, and three equivalent series resistances a, RS is touched
Send out device, a discharge tube T and power output stage.It can provide two reference voltage Vs CC/3 and 2VCC/3.
Dutycycle algorithm D=RA/ (RA+RB)；
Periodical algorithms T=(RA+RB) * C1/1.43.
Preferably, switching on and shutting down timing setting unit 12 can also include：
Resistance RC and LED 1；
Resistance RC one end is connected with 3 pin of timer 121, the resistance RC other end and the anode of LED 1
Connection, the minus earth of LED 1.
In embodiments of the present invention, can be by LED 1 come the output state of prompt switch control signal.
The embodiment of the present invention sets switching on and shutting down time and the switch of display screen to be measured by switching on and shutting down timing setting unit
Unit frequency, the break-make of start power supply is further controlled by logic control element and start control unit, test is booted up, and
By photosensitive detection unit recognize display screen whether normal boot-strap, without artificial uninterrupted observation, as long as complete machine can not
Brilliant white screen, the circuit automatically controls the test of shutdown switch machine, display screen is maintained at black state, exception is live to protect
Stay, so as to dramatically saves on manpower and materials.
The another object of the embodiment of the present invention is that there is provided a kind of display screen for test circuit of being started shooting including above-mentioned display screen
Start test device.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Any modifications, equivalent substitutions and improvements made within principle etc., should be included in the scope of the protection.
Claims (8)
- The test circuit 1. a kind of display screen is started shooting, is connected, it is characterised in that described with the start power supply controlled end of display screen to be measured Circuit includes：Photosensitive detection unit, for judging display screen to be measured whether just by detecting the white field signal shown after display screen start Normally opened machine, and correspondence generates sense light detecting signal；Switching on and shutting down timing setting unit, switching on and shutting down time and switch unit frequency for setting display screen to be measured, and correspondence are generated Periodic pulse signal；Logic control element, for according to the periodic pulse signal and it is described it is photosensitive detection signal generation logic control signal, The first input end of the logic control element is connected with the output end of the switching on and shutting down timing setting unit, the logic control Second output end of unit is connected with the output end of the photosensitive detection unit；Switch control unit, for according to the logic control signal output switch control signal, to control the display to be measured The start power supply controlled end start of screen, the output end of the input of the switch control unit and the logic control element connects Connect, the output end of the switch control unit is connected with the start power supply controlled end of the display screen to be measured.
- 2. circuit as claimed in claim 1, it is characterised in that the photosensitive detection unit is photoinduction sensor.
- 3. circuit as claimed in claim 1, it is characterised in that the switching on and shutting down timing setting unit includes：Electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C6, electric capacity C7, resistance RA, resistance RB and timer；2 pin of the timer are connected for the frequency selection end of the switching on and shutting down timing setting unit with 6 pin of the timer, 6 pin of the timer are connected by the resistance RB with 7 pin of the timer, and 7 pin of the timer pass through the electricity Resistance RA is connected with 8 pin of the timer, and 8 pin and 4 pin of the timer are all connected with the positive pole of system power supply, the timer 3 pin be the switching on and shutting down timing setting unit output end, the 1 pin ground connection of the timer, 5 pin of the timer pass through The electric capacity C7 ground connection,The electric capacity C1 to the electric capacity C6 one end are respectively multiple frequencies sorting end of the switching on and shutting down timing setting unit, The selective selection end with the switching on and shutting down timing setting unit is connected.
- 4. circuit as claimed in claim 3, it is characterised in that the timer is 555 timers or 7555 timers.
- 5. circuit as claimed in claim 3, it is characterised in that the switching on and shutting down timing setting unit also includes：Resistance RC and LED 1；One end of the resistance RC is connected with 3 pin of the timer, the other end and the light emitting diode of the resistance RC LED1 anode connection, the minus earth of the LED 1.
- 6. circuit as claimed in claim 1, it is characterised in that the logic control element be with gate logic device, it is described with The first input end of gate logic device is the first input end of the logic control element, described second defeated with gate logic device Enter second input of the end for the logic control element, the output end with gate logic device is the logic control element Output end.
- 7. circuit as claimed in claim 1, it is characterised in that the switch control unit is relay.
- The test device 8. a kind of display screen is started shooting, it is characterised in that described device is included as described in any one of claim 1 to 7 Display screen start test circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710476242.1A CN107037299B (en) | 2017-06-21 | 2017-06-21 | Display screen start-up test circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710476242.1A CN107037299B (en) | 2017-06-21 | 2017-06-21 | Display screen start-up test circuit and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107037299A true CN107037299A (en) | 2017-08-11 |
| CN107037299B CN107037299B (en) | 2023-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710476242.1A Active CN107037299B (en) | 2017-06-21 | 2017-06-21 | Display screen start-up test circuit and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509073A (en) * | 2017-08-30 | 2017-12-22 | 四川长虹电器股份有限公司 | A kind of automated testing method of automatic decision start blank screen |
| CN111724722A (en) * | 2020-05-07 | 2020-09-29 | 安徽中科光电色选机械有限公司 | Display screen detection device for color sorter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101322092A (en) * | 2005-11-30 | 2008-12-10 | 皇家飞利浦电子股份有限公司 | Light pen input system and method, particularly for use with large area non-CRT displays |
| CN102455927A (en) * | 2010-11-03 | 2012-05-16 | 汉王科技股份有限公司 | Method and device for quickly controlling electronic reader |
| CN103377102A (en) * | 2012-04-20 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Reset and power on-off testing system for computer |
| US20140229126A1 (en) * | 2011-07-18 | 2014-08-14 | Xi Hu | Fault detection method and device |
| CN207067268U (en) * | 2017-06-21 | 2018-03-02 | 合肥惠科金扬科技有限公司 | A kind of display screen start test circuit and device |
-
2017
- 2017-06-21 CN CN201710476242.1A patent/CN107037299B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101322092A (en) * | 2005-11-30 | 2008-12-10 | 皇家飞利浦电子股份有限公司 | Light pen input system and method, particularly for use with large area non-CRT displays |
| CN102455927A (en) * | 2010-11-03 | 2012-05-16 | 汉王科技股份有限公司 | Method and device for quickly controlling electronic reader |
| US20140229126A1 (en) * | 2011-07-18 | 2014-08-14 | Xi Hu | Fault detection method and device |
| CN103377102A (en) * | 2012-04-20 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Reset and power on-off testing system for computer |
| CN207067268U (en) * | 2017-06-21 | 2018-03-02 | 合肥惠科金扬科技有限公司 | A kind of display screen start test circuit and device |
Non-Patent Citations (1)
| Title |
|---|
| 赵新成;: "液晶彩电常见故障维修笔记" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107509073A (en) * | 2017-08-30 | 2017-12-22 | 四川长虹电器股份有限公司 | A kind of automated testing method of automatic decision start blank screen |
| CN111724722A (en) * | 2020-05-07 | 2020-09-29 | 安徽中科光电色选机械有限公司 | Display screen detection device for color sorter |
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| Publication number | Publication date |
|---|---|
| CN107037299B (en) | 2023-05-16 |
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