CN103647964A - TV card testing circuit and testing method thereof - Google Patents
TV card testing circuit and testing method thereof Download PDFInfo
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- CN103647964A CN103647964A CN201310671397.2A CN201310671397A CN103647964A CN 103647964 A CN103647964 A CN 103647964A CN 201310671397 A CN201310671397 A CN 201310671397A CN 103647964 A CN103647964 A CN 103647964A
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Abstract
The invention discloses a TV card testing circuit and a testing method thereof. The TV card testing circuit comprises a VCC power supply control circuit, a backlight driving control circuit, a terminal and a high-level power supply circuit. The terminal comprises a first pin, a second pin and a third pin, the first pin is connected with the high-level power supply circuit, the second pin is connected with a backlight brightness control signal input end of the backlight driving control circuit, and the third pin is connected with a power supply switch control signal input end of the VCC power supply control circuit. When a TV card is tested, the first pin, the second pin and the third pin of the terminal are in short circuit connection. According to the TV card testing circuit and the testing method, the testing efficiency of the TV card can be improved, and the cost is saved.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of television board test circuit and method of testing.
Background technology
At LED(Light-Emitting Diode, light-emitting diode) in television board production process, need to test television board, to check the qualification rate of television board, test process is divided into preliminary survey, aging and repetition measurement three phases.
As shown in Figure 1, be the backlight drive control circuit figure of television board in prior art.Wherein, the effect of backlight drive control circuit is to drive the control circuit of lighting LED-backlit, and inside comprises driving chip, back facet current detection, FEEDBACK CONTROL etc.VCC power supply control circuit is to provide the VCC circuit of power supply for backlight drive circuit.Mainboard chip is the master chip of TV main board, is responsible for the processing of audio-video signal and the control of I/O mouth etc.VCC power supply is the supply power voltage of backlight drive circuit.ON/OFF control signal is to control the through and off of VCC voltage, and when this signal is high level, VCC supply power voltage is set up, when this signal is low level, and the VCC cut-off of powering.ADJ control signal is the control signal of backlight illumination, and when ADJ control signal is high level, backlight illumination is the brightest; When ADJ control signal is low level, backlight extinguishing, when ADJ control signal is the change in duty cycle between 0%-100%, backlight illumination also and then changes according to described duty ratio.
Television board, in the production test of factory, must meet following 2 requirements: the first, at preliminary survey, repetition measurement station, must judge that back facet current is whether within specification so that lit at maximum brightness is backlight.The second, in aging station, the in the situation that of lasting AC energising, backlight also must be with maximum current continuous firing.So just require when the production test of factory, preliminary survey, test aging, repetition measurement station must guarantee that ADJ control signal and ON/OFF control signal are lasting high level, and such requirement is referred to as aging mode.
In the testing scheme of existing television board, for meeting 2 above requirements, must first write an aging mode formula, the function that this formula realizes is: after making television board connect AC power supplies, automatically enter aging mode.At the first survey station of production test, first by inserting burned this aging mode formula of USB flash disk, after the burned success of formula, first survey station judges that back facet current is whether within specification; Then, at aging station, television board is connected after AC power supplies, and ADJ control signal and ON/OFF control signal automatic-ascending are high level, thereby make circuit continuous firing backlight aging, finally at repetition measurement station, have again judged after back facet current, by button, exit aging mode.
There is following shortcoming in the testing scheme of above-mentioned television board: the formula that enters aging mode that need to write in advance test use, and need to insert manually USB flash disk burned this formula at first survey station, this has increased labour's input and the input in working time undoubtedly.In addition, after burned formula, need waiting system to restart start, the power supply available machine time is about 1 second, and the available machine time of mainboard approximately needs more than 20 seconds, to affect the testing time of preliminary survey and repetition measurement, causes operating efficiency low.In addition, at repetition measurement station, also need to add button operation to exit aging mode, increased the step of test, reduced operating efficiency, lavish labor on.
Summary of the invention
The present invention proposes a kind of television board test circuit and method of testing, can improve the testing efficiency of television board, cost-saving.
On the one hand, the embodiment of the present invention provides a kind of television board test circuit, comprises VCC power supply control circuit, backlight drive control circuit, terminal and high level supply line;
Described VCC power supply control circuit is for supplying VCC power supply to described backlight drive control circuit, and the VCC power output end of described VCC power supply control circuit is electrically connected to the VCC power input of described backlight drive control circuit;
Described backlight drive control circuit is for driving the backlight module of lighting television board;
Described high level supply line is used for exporting high level signal;
Described terminal comprises the first pin, crus secunda and tripod, described the first pin connects described high level supply line, described crus secunda connects the backlight illumination control signal input of described backlight drive control circuit, and described tripod connects the mains switch control signal input of described VCC power supply control circuit;
When described television board is tested, by the first pin of described terminal, crus secunda, short circuit is connected with tripod.
Further, described television board test circuit also comprises mainboard chip, and described mainboard chip is controlled for the treatment of audio-video signal and I/O mouth; The mains switch control signal input of the mains switch control signal output of described mainboard chip and described VCC power supply control circuit is electrically connected to, and the backlight illumination control signal output of described mainboard chip and the backlight illumination control signal input of described backlight drive control circuit are connected; The 3V3 power circuit that described high level supply line is described mainboard chip, described high level signal is 3.3V signal.
Further, described test comprises preliminary survey and repetition measurement; When described television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin, crus secunda and the tripod short circuit of described terminal, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
Further, described test comprises burn-in test; When described television board is carried out to burn-in test, utilize wire rod by the first pin, crus secunda and the tripod short circuit of described terminal, by described wire rod, the high level signal of described high level supply line output is transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
On the other hand, the embodiment of the present invention provides a kind of television board method of testing, comprising:
On television board, configure a terminal, described terminal comprises the first pin, crus secunda and tripod, described the first pin connects high level supply line, described crus secunda connects the backlight illumination control signal input of backlight drive control circuit, and described tripod connects the mains switch control signal input of VCC power supply control circuit; Wherein, described VCC power supply control circuit is for supplying VCC power supply to described backlight drive control circuit, and the VCC power output end of described VCC power supply control circuit is electrically connected to the VCC power input of described backlight drive control circuit; Described backlight drive control circuit is for driving the backlight module of lighting television board; Described high level supply line is used for exporting high level signal;
Described television board is tested, by the first pin of described terminal, crus secunda, short circuit is connected with tripod, make the high level signal of described high level supply line output be transferred to the mains switch control signal input of described VCC power supply control circuit, control described VCC power supply control circuit to described backlight drive control circuit supply VCC power supply; Meanwhile, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
Judge that the size of back facet current of described television board whether in the threshold range of regulation, if so, judges that described television board is qualified, if not, judge that described television board is defective.
Further, on described television board, dispose mainboard chip, described mainboard chip is controlled for the treatment of audio-video signal and I/O mouth; The mains switch control signal input of the mains switch control signal output of described mainboard chip and described VCC power supply control circuit is electrically connected to, and the backlight illumination control signal output of described mainboard chip and the backlight illumination control signal input of described backlight drive control circuit are connected; The 3V3 power circuit that described high level supply line is described mainboard chip, described high level signal is 3.3V signal.
Further, described test comprises preliminary survey and repetition measurement; When described television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin, crus secunda and the tripod short circuit of described terminal, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
Further, described test comprises burn-in test; When described television board is carried out to burn-in test, utilize wire rod by the first pin, crus secunda and the tripod short circuit of described terminal, by described wire rod, the high level signal of described high level supply line output is transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
Television board test circuit and method of testing that the embodiment of the present invention provides, there is following beneficial effect: by leading-in terminal, be used as VCC power supply control line work whether control end and whether brightness of backlight is set to the brightest control end, replaced television board measurement circuit in prior art need to write in advance one section of formula, and burned this formula, control VCC power supply control line work and whether whether be set to the brightest operation with brightness of backlight.Saved and write this step of formula, and then saved the stand-by period of burned formula, be completed rear direct open terminal just passable, and do not need additionally to increase a button, thereby reduced the workload of television board test, improved television board testing efficiency, and circuit structure is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is the backlight drive control circuit figure of television board in prior art;
Fig. 2 is the structural representation of an embodiment of television board test circuit provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Referring to Fig. 2, it is the structural representation of an embodiment of television board test circuit provided by the invention.
The embodiment of the present invention provides a kind of television board test circuit, comprises VCC power supply control circuit 101, backlight drive control circuit 102, terminal 104He high level supply line 105; Specific as follows:
VCC power supply control circuit 101 is for supplying VCC power supplys to backlight drive control circuit 102, and the VCC power output end of VCC power supply control circuit 101 is electrically connected to the VCC power input of backlight drive control circuit 102.
Backlight drive control circuit 102 is for driving the backlight module of lighting television board.
High level supply line 105 is for exporting high level signal.
When television board is tested, by the first pin 1 of terminal 104, crus secunda 2,3 short circuits are connected with tripod.
In one embodiment, above-mentioned television board test circuit also comprises mainboard chip 103, and mainboard chip 103 is controlled for the treatment of audio-video signal and I/O mouth.The mains switch control signal input of the mains switch control signal output of mainboard chip 103 and VCC power supply control circuit 101 is electrically connected to, and the backlight illumination control signal output of mainboard chip 103 and the backlight illumination control signal input of backlight drive control circuit 102 are connected.
During concrete enforcement, mainboard chip 103 output ON/OFF control signals, for controlling the power supply state of VCC power supply control circuit 101.When ON/OFF control signal is high level, VCC power supply control circuit 101 is to 102 power supplies of backlight drive control circuit; When ON/OFF control signal is low level, 101 cut-offs of VCC power supply control circuit are to 102 power supplies of backlight drive control circuit.Mainboard chip 103 is also exported ADJ control signal, for controlling backlight illumination; When ADJ control signal is low level, backlight extinguishing, when ADJ control signal is the change in duty cycle between 0%-100%, backlight illumination is also according to described change in duty cycle.
In another embodiment, above-mentioned high level supply line 105 is the 3V3 power circuit of mainboard chip 103, and high level signal is 3.3V signal.It is the 3V3 signal that the first pin 1 of terminal 104 connects mainboard chip 103.
In the specific implementation, when the mains switch control signal input of VCC power supply control circuit 101 receives high level signal, VCC power supply control circuit 101 is to backlight drive control circuit 102 supply VCC power supplys; When the mains switch control signal input of VCC power supply control circuit 101 receives low level signal, 101 cut-offs of VCC power supply control circuit are to backlight drive control circuit 102 supply VCC power supplys.
When the backlight illumination control signal input of backlight drive control circuit 102 receives high level signal, it is the brightest that backlight drive control circuit 102 is controlled backlight illumination; When the backlight illumination control signal input of backlight drive control circuit 102 receives low level signal, backlight drive control circuit 102 is controlled backlight extinguishing; During the change in duty cycle of the signal receiving when the backlight illumination control signal input of backlight drive control circuit 102 between 0%-100%, backlight drive control circuit 102 is controlled backlight illuminations according to change in duty cycle.
In television board production process, need to test television board, to check the qualification rate of television board, test process is divided into preliminary survey, aging and repetition measurement three phases.Specific as follows:
The test that television board is carried out comprises preliminary survey and repetition measurement; When television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin 1, crus secunda 2 and tripod 3 short circuits of terminal 104, make the high level signal of high level supply line 105 outputs be transferred to the backlight illumination control signal input of backlight drive control circuit 102 and the mains switch control signal input of VCC power supply control circuit 101.That is to say, in preliminary survey, repetition measurement station, by terminal 104, high level signal (for example 3.3V signal) is guided to the backlight illumination control signal input of backlight drive control circuit 102 and the mains switch control signal input of VCC power supply control circuit 101, so that lit at maximum brightness is backlight, judge that back facet current is whether within specification.
Further, the test of television board being carried out also comprises burn-in test; When television board is carried out to burn-in test, utilize wire rod by the first pin 1, crus secunda 2 and tripod 3 short circuits of terminal 104, by wire rod, the high level signal of high level supply line 105 outputs is transferred to the backlight illumination control signal input of backlight drive control circuit 102 and the mains switch control signal input of VCC power supply control circuit 101.In aging station, on aging wire rod, increase a wire rod with 3 stitch, and 3 stitch of this wire rod be short circuit together, when aging, this wire rod is inserted on 3 pin of the terminal 104 on plate, high level signal (for example 3.3V signal) is guided to the backlight illumination control signal input of backlight drive control circuit 102 and the mains switch control signal input of VCC power supply control circuit 101, thereby it is aging to start circuit backlight continuous firing, after aging completing, again this wire rod is extracted.
The embodiment of the present invention also provides a kind of television board method of testing, can be applied in the television board test circuit of above-described embodiment, for checking the qualification rate of television board.
The embodiment of the present invention provides a kind of television board method of testing, comprises the following steps:
S1, on television board, configure a terminal, described terminal comprises the first pin, crus secunda and tripod, described the first pin connects high level supply line, described crus secunda connects the backlight illumination control signal input of backlight drive control circuit, and described tripod connects the mains switch control signal input of VCC power supply control circuit; Wherein, described VCC power supply control circuit is for supplying VCC power supply to described backlight drive control circuit, and the VCC power output end of described VCC power supply control circuit is electrically connected to the VCC power input of described backlight drive control circuit; Described backlight drive control circuit is for driving the backlight module of lighting television board; Described high level supply line is used for exporting high level signal;
S2, described television board is tested, by the first pin of described terminal, crus secunda, short circuit is connected with tripod, make the high level signal of described high level supply line output be transferred to the mains switch control signal input of described VCC power supply control circuit, control described VCC power supply control circuit to described backlight drive control circuit supply VCC power supply; Meanwhile, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
S3, judge described television board the size of back facet current whether in the threshold range of regulation, if so, judge that described television board is qualified, if not, judge that described television board is defective.
In an optional implementation method, on described television board, dispose mainboard chip, described mainboard chip is controlled for the treatment of audio-video signal and I/O mouth; The mains switch control signal input of the mains switch control signal output of described mainboard chip and described VCC power supply control circuit is electrically connected to, and the backlight illumination control signal output of described mainboard chip and the backlight illumination control signal input of described backlight drive control circuit are connected; The 3V3 power circuit that described high level supply line is described mainboard chip, described high level signal is 3.3V signal.
During concrete enforcement, when the mains switch control signal input of described VCC power supply control circuit receives high level signal, described VCC power supply control circuit is to described backlight drive control circuit supply VCC power supply;
When the mains switch control signal input of described VCC power supply control circuit receives low level signal, described VCC power supply control circuit cut-off is to described backlight drive control circuit supply VCC power supply;
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal, described backlight drive control circuit is controlled backlight extinguishing;
During the change in duty cycle of the signal receiving when the backlight illumination control signal input of described backlight drive control circuit between 0%-100%, described backlight drive control circuit is controlled backlight illumination according to described change in duty cycle.
More specifically, the test of television board is comprised to preliminary survey, repetition measurement and burn-in test, specific as follows:
When described television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin, crus secunda and the tripod short circuit of described terminal, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
When described television board is carried out to burn-in test, utilize wire rod by the first pin, crus secunda and the tripod short circuit of described terminal, by described wire rod, the high level signal of described high level supply line output is transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
It should be noted that, the 3V3 power circuit that above-described embodiment Jin Yi high level supply line is mainboard chip is that example is described, in the middle of concrete enforcement, high level supply line can be an independently circuit, and the high level signal of exporting can be 3.3V, 5V etc.
Television board test circuit and method of testing that the embodiment of the present invention provides, by leading-in terminal, be used as VCC power supply control line work whether control end and whether brightness of backlight is set to the brightest control end, realized quickly and easily the object that needs to provide high level to above-mentioned backlight drive control circuit and above-mentioned VCC power supply control circuit in test process.The test process of the embodiment of the present invention does not need to write formula, does not need burned formula yet.After being completed, directly take off tool thimble or wire rod, without the extra button that increases, carry out finish test procedure.Compare with measurement circuit of the prior art, the embodiment of the present invention is succinctly efficient, has reduced the workload of television board test, improved television board testing efficiency, and circuit structure is simple, and cost is low.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a television board test circuit, is characterized in that, comprises VCC power supply control circuit, backlight drive control circuit, terminal and high level supply line;
Described VCC power supply control circuit is for supplying VCC power supply to described backlight drive control circuit, and the VCC power output end of described VCC power supply control circuit is electrically connected to the VCC power input of described backlight drive control circuit;
Described backlight drive control circuit is for driving the backlight module of lighting television board;
Described high level supply line is used for exporting high level signal;
Described terminal comprises the first pin, crus secunda and tripod, described the first pin connects described high level supply line, described crus secunda connects the backlight illumination control signal input of described backlight drive control circuit, and described tripod connects the mains switch control signal input of described VCC power supply control circuit;
When described television board is tested, by the first pin of described terminal, crus secunda, short circuit is connected with tripod.
2. television board test circuit as claimed in claim 1, is characterized in that, described television board test circuit also comprises mainboard chip, and described mainboard chip is controlled for the treatment of audio-video signal and I/O mouth;
The mains switch control signal input of the mains switch control signal output of described mainboard chip and described VCC power supply control circuit is electrically connected to, and the backlight illumination control signal output of described mainboard chip and the backlight illumination control signal input of described backlight drive control circuit are connected;
The 3V3 power circuit that described high level supply line is described mainboard chip, described high level signal is 3.3V signal.
3. television board test circuit as claimed in claim 2, it is characterized in that, when the mains switch control signal input of described VCC power supply control circuit receives high level signal, described VCC power supply control circuit is to described backlight drive control circuit supply VCC power supply;
When the mains switch control signal input of described VCC power supply control circuit receives low level signal, described VCC power supply control circuit cut-off is to described backlight drive control circuit supply VCC power supply;
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal, described backlight drive control circuit is controlled backlight extinguishing;
During the change in duty cycle of the signal receiving when the backlight illumination control signal input of described backlight drive control circuit between 0%-100%, described backlight drive control circuit is controlled backlight illumination according to described change in duty cycle.
4. television board test circuit as claimed in claim 3, is characterized in that, described test comprises preliminary survey and repetition measurement;
When described television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin, crus secunda and the tripod short circuit of described terminal, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
5. television board test circuit as claimed in claim 3, is characterized in that, described test comprises burn-in test;
When described television board is carried out to burn-in test, utilize wire rod by the first pin, crus secunda and the tripod short circuit of described terminal, by described wire rod, the high level signal of described high level supply line output is transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
6. a television board method of testing, is characterized in that, comprising:
On television board, configure a terminal, described terminal comprises the first pin, crus secunda and tripod, described the first pin connects high level supply line, described crus secunda connects the backlight illumination control signal input of backlight drive control circuit, and described tripod connects the mains switch control signal input of VCC power supply control circuit; Wherein, described VCC power supply control circuit is for supplying VCC power supply to described backlight drive control circuit, and the VCC power output end of described VCC power supply control circuit is electrically connected to the VCC power input of described backlight drive control circuit; Described backlight drive control circuit is for driving the backlight module of lighting television board; Described high level supply line is used for exporting high level signal;
Described television board is tested, by the first pin of described terminal, crus secunda, short circuit is connected with tripod, make the high level signal of described high level supply line output be transferred to the mains switch control signal input of described VCC power supply control circuit, control described VCC power supply control circuit to described backlight drive control circuit supply VCC power supply; Meanwhile, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
Judge that the size of back facet current of described television board whether in the threshold range of regulation, if so, judges that described television board is qualified, if not, judge that described television board is defective.
7. television board method of testing as claimed in claim 6, is characterized in that, on described television board, disposes mainboard chip, and described mainboard chip is controlled for the treatment of audio-video signal and I/O mouth;
The mains switch control signal input of the mains switch control signal output of described mainboard chip and described VCC power supply control circuit is electrically connected to, and the backlight illumination control signal output of described mainboard chip and the backlight illumination control signal input of described backlight drive control circuit are connected;
The 3V3 power circuit that described high level supply line is described mainboard chip, described high level signal is 3.3V signal.
8. television board method of testing as claimed in claim 7, it is characterized in that, when the mains switch control signal input of described VCC power supply control circuit receives high level signal, described VCC power supply control circuit is to described backlight drive control circuit supply VCC power supply;
When the mains switch control signal input of described VCC power supply control circuit receives low level signal, described VCC power supply control circuit cut-off is to described backlight drive control circuit supply VCC power supply;
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal, it is the brightest that described backlight drive control circuit is controlled backlight illumination;
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal, described backlight drive control circuit is controlled backlight extinguishing;
During the change in duty cycle of the signal receiving when the backlight illumination control signal input of described backlight drive control circuit between 0%-100%, described backlight drive control circuit is controlled backlight illumination according to described change in duty cycle.
9. television board method of testing as claimed in claim 8, is characterized in that, described test comprises preliminary survey and repetition measurement;
When described television board is carried out to preliminary survey and repetition measurement, utilize tool thimble directly by the first pin, crus secunda and the tripod short circuit of described terminal, make the high level signal of described high level supply line output be transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
10. television board method of testing as claimed in claim 8, is characterized in that, described test comprises burn-in test;
When described television board is carried out to burn-in test, utilize wire rod by the first pin, crus secunda and the tripod short circuit of described terminal, by described wire rod, the high level signal of described high level supply line output is transferred to the backlight illumination control signal input of described backlight drive control circuit and the mains switch control signal input of described VCC power supply control circuit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782237A (en) * | 2016-12-14 | 2017-05-31 | 深圳Tcl新技术有限公司 | The test device of lcd panel test plate and television set |
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201765037U (en) * | 2010-09-15 | 2011-03-16 | 福州科迪电子技术有限公司 | Weighing sensor having anti-cheating function |
| CN102054412A (en) * | 2009-11-09 | 2011-05-11 | 纬创资通股份有限公司 | Device for detecting different motherboard circuits by commonly using power supply and display and switching device |
| CN201910952U (en) * | 2010-11-23 | 2011-07-27 | 深圳市科特科技股份有限公司 | LED driving circuit |
| CN202309992U (en) * | 2011-07-29 | 2012-07-04 | 广州视源电子科技有限公司 | Automatic television board testing system |
-
2013
- 2013-12-10 CN CN201310671397.2A patent/CN103647964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102054412A (en) * | 2009-11-09 | 2011-05-11 | 纬创资通股份有限公司 | Device for detecting different motherboard circuits by commonly using power supply and display and switching device |
| CN201765037U (en) * | 2010-09-15 | 2011-03-16 | 福州科迪电子技术有限公司 | Weighing sensor having anti-cheating function |
| CN201910952U (en) * | 2010-11-23 | 2011-07-27 | 深圳市科特科技股份有限公司 | LED driving circuit |
| CN202309992U (en) * | 2011-07-29 | 2012-07-04 | 广州视源电子科技有限公司 | Automatic television board testing system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782237A (en) * | 2016-12-14 | 2017-05-31 | 深圳Tcl新技术有限公司 | The test device of lcd panel test plate and television set |
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
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| Publication number | Publication date |
|---|---|
| CN103647964B (en) | 2016-08-17 |
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