CN103647964B - Television board test circuit and method of testing - Google Patents
Television board test circuit and method of testing Download PDFInfo
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- CN103647964B CN103647964B CN201310671397.2A CN201310671397A CN103647964B CN 103647964 B CN103647964 B CN 103647964B CN 201310671397 A CN201310671397 A CN 201310671397A CN 103647964 B CN103647964 B CN 103647964B
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Abstract
The invention discloses a kind of television board test circuit and method of testing, described television board test circuit includes that VCC power supply control circuit, backlight drive control circuit, terminal and high level supply line；Described terminal includes the first foot, crus secunda and the 3rd foot, described first foot connects described high level supply line, described crus secunda connects described backlight drive and controls the backlight illumination control signal input of circuit, and described 3rd foot connects the power switch control signal input of described VCC power supply control circuit；When described television board is tested, the first foot of described terminal, crus secunda and the 3rd foot short circuit are connected.The present invention can improve the testing efficiency of television board, cost-effective.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of television board test circuit and method of testing.
Background technology
In LED (Light-Emitting Diode, light emitting diode) television board production process, it is right to need
Television board is tested, and to check the qualification rate of television board, test process is divided into preliminary survey, aging and multiple
Survey three phases.
As it is shown in figure 1, be the backlight drive control circuit figure of television board in prior art.Wherein, backlight
Driving the effect controlling circuit is the control circuit driving and lighting LED-backlit, and inside comprises driving chip, the back of the body
Photoelectric current detection, feedback control etc..VCC power supply control circuit is to provide VCC to power for backlight drive circuit
Circuit.Mainboard chip is the master chip of TV main board, is responsible for the process of audio-video signal and I/O mouth
Control.It is the supply voltage of backlight drive circuit that VCC powers.ON/OFF control signal is to control VCC
The through and off of voltage, when this signal is high level, VCC supply voltage is set up, when this signal is low level
Time, VCC powers cut-off.ADJ control signal is the control signal of backlight illumination, when ADJ control signal is
During high level, backlight illumination is the brightest；When ADJ control signal is low level, backlight is extinguished, when ADJ is controlled
When signal processed is the change in duty cycle between 0%-100%, backlight illumination is also according to the and then change of described dutycycle.
Television board is in the production test of factory, it is necessary to meet following 2 requirements: first, preliminary survey,
Repetition measurement station, it is necessary to judge that back facet current is whether within specification with lit at maximum brightness backlight.Second,
In aging station, in the case of lasting AC is energized, backlight also must be with maximum current continuous firing.Thus
Requiring when the production test of factory, preliminary survey, test aging, repetition measurement station must assure that ADJ control signal
And ON/OFF control signal is lasting high level, such requirement is referred to as aging mode.
In the testing scheme of existing television board, for meeting 2 above requirements, it is necessary to first write one
Individual aging mode formula, the function that this formula realizes is: make television board connect after AC power supplies automatically into always
Change pattern.At the first survey station of production test, first passing through slotting USB flash disk this aging mode formula burned, formula is burned
After success, first survey station judges that back facet current is whether within specification；Then at aging station, television board is connected
After AC power supplies, ADJ control signal and ON/OFF control signal rise to high level automatically, so that backlight
Circuit continuous firing is aging, finally after repetition measurement station has judged back facet current again, exits aging mould by button
Formula.
The testing scheme of above-mentioned television board has the disadvantage in that the entrance needing to write in advance test is old
The formula of change pattern, and need to insert USB flash disk this formula burned manually at first survey station, this increases undoubtedly
Add putting into and the input in labor time of labour force.Additionally, need waiting system to restart out after burned formula
Machine, the power supply available machine time is about 1 second, and the available machine time of mainboard about needs more than 20 seconds, affects preliminary survey and multiple
The testing time surveyed, cause work efficiency low.Move back it addition, also need to add button operation at repetition measurement station
Go out aging mode, add the step of test, reduce work efficiency, lavish labor on.
Summary of the invention
The present invention proposes a kind of television board test circuit and method of testing, it is possible to increase the test of television board
Efficiency, cost-effective.
On the one hand, the embodiment of the present invention provides a kind of television board test circuit, including VCC power supply control line
Road, backlight drive control circuit, terminal and high level supply line；
Described VCC power supply control circuit is for controlling line feed VCC power supply, institute to described backlight drive
State the VCC power output end of VCC power supply control circuit and the VCC power supply of described backlight drive control circuit
Input electrically connects；
Described backlight drive controls circuit for driving the backlight module lighting television board；
Described high level supply line is used for exporting high level signal；
Described terminal includes that the first foot, crus secunda and the 3rd foot, described first foot connect described high level and power
Circuit, described crus secunda connects described backlight drive and controls the backlight illumination control signal input of circuit, institute
State the 3rd foot and connect the power switch control signal input of described VCC power supply control circuit；
When described television board is tested, by short to the first foot of described terminal, crus secunda and the 3rd foot
Road connects.
Further, described television board test circuit also includes that mainboard chip, described mainboard chip are used for locating
Reason audio-video signal and I/O mouth control；The power switch control signal outfan of described mainboard chip and described
The power switch control signal input electrical connection of VCC power supply control circuit, the backlight of described mainboard chip is bright
Degree control signal outfan and described backlight drive control the backlight illumination control signal input of circuit and connect；
Described high level supply line is the power circuit of described mainboard chip, and described high level signal is 3.3V signal.
Further, described test includes preliminary survey and repetition measurement；Described television board is being carried out preliminary survey with multiple
During survey, utilize tool thimble directly by the first foot of described terminal, crus secunda and the short circuit of the 3rd foot, make described
The high level signal of high level supply line output is transferred to described backlight drive and controls the backlight illumination of circuit
Control signal input and the power switch control signal input of described VCC power supply control circuit.
Further, described test includes burn-in test；When described television board is carried out burn-in test,
Utilize wire rod the first foot of described terminal, crus secunda and the 3rd foot is short-circuit, by described wire rod by described height
High level signal transmission to the described backlight drive of level supply line output controls the backlight illumination of circuit and controls
Signal input part and the power 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, including:
Configuring a terminal on television board, described terminal includes the first foot, crus secunda and the 3rd foot, institute
Stating the first foot and connect high level supply line, described crus secunda connects backlight drive and controls the backlight illumination of circuit
Control signal input, described 3rd foot connects the power switch control signal input of VCC power supply control circuit
End；Wherein, described VCC power supply control circuit is for controlling line feed VCC electricity to described backlight drive
Source, the VCC power output end of described VCC power supply control circuit controls the VCC of circuit with described backlight drive
Power input electrically connects；Described backlight drive controls circuit for driving the backlight module lighting television board；
Described high level supply line is used for exporting high level signal；
Described television board is tested, by the first foot of described terminal, crus secunda and the 3rd foot short circuit even
Connecing, the high level signal making described high level supply line export is transferred to described VCC power supply control circuit
Power switch control signal input, control described VCC power supply control circuit and control to described backlight drive
Line feed VCC power supply；Meanwhile, the high level signal making described high level supply line export is transferred to
Described backlight drive controls the backlight illumination control signal input of circuit, and described backlight drive controls circuit control
Backlight illumination processed is the brightest；
Judge the size of back facet current of described television board whether in the threshold range of regulation, the most then
Judge that described television board is qualified, if it is not, then judge that described television board is defective.
Further, described television board being configured with mainboard chip, described mainboard chip is used for processing sound and regards
Frequently signal and I/O mouth control；The power switch control signal outfan of described mainboard chip and described VCC supply
The power switch control signal input electrical connection of electric control circuit, the backlight illumination of described mainboard chip controls
Signal output part and described backlight drive control the backlight illumination control signal input of circuit and connect；Described height
Level supply line is the power circuit of described mainboard chip, and described high level signal is 3.3V signal.
Further, described test includes preliminary survey and repetition measurement；Described television board is being carried out preliminary survey with multiple
During survey, utilize tool thimble directly by the first foot of described terminal, crus secunda and the short circuit of the 3rd foot, make described
The high level signal of high level supply line output is transferred to described backlight drive and controls the backlight illumination of circuit
Control signal input and the power switch control signal input of described VCC power supply control circuit.
Further, described test includes burn-in test；When described television board is carried out burn-in test,
Utilize wire rod the first foot of described terminal, crus secunda and the 3rd foot is short-circuit, by described wire rod by described height
High level signal transmission to the described backlight drive of level supply line output controls the backlight illumination of circuit and controls
Signal input part and the power switch control signal input of described VCC power supply control circuit.
The television board that the embodiment of the present invention provides tests circuit and method of testing, has the advantages that
It is used as VCC power supply control line work whether control end by leading-in terminal and whether brightness of backlight sets
Being set to the brightest control end, instead of television board measurement circuit in prior art needs to write one section of journey in advance
Formula, and this formula burned, control whether whether VCC power supply control line work arranged with brightness of backlight
For the brightest operation.Eliminate the step for of writing formula, and then save the waiting time of burned formula,
After being completed, directly open terminal is the most permissible, increases a button without extra, thus decreases
The workload of television board test, improves television board testing efficiency, and circuit structure is simple, cost
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 the television board test circuit that the present invention provides.
Detailed description of the invention
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 carried out clearly
Chu, it is fully described by.
See Fig. 2, be the structural representation of an embodiment of the television board test circuit that the present invention provides.
The embodiment of the present invention provides a kind of television board test circuit, including VCC power supply control circuit 101,
Backlight drive controls circuit 102, terminal 104 and high level supply line 105；Specific as follows:
VCC power supply control circuit 101 is for supplying VCC power supply, VCC to backlight drive control line road 102
The VCC power supply that the VCC power output end of power supply control circuit 101 controls circuit 102 with backlight drive is defeated
Enter end electrical connection.
Backlight drive controls circuit 102 for driving the backlight module lighting television board.
High level supply line 105 is used for exporting high level signal.
Terminal 104 includes the first foot 1, crus secunda 2 and the 3rd foot 3, and the first foot 1 connects high level supply lines
Road 105, crus secunda 2 connect backlight drive control circuit 102 backlight illumination control signal input, the 3rd
Foot 3 connects the power switch control signal input of VCC power supply control circuit 101.
When television board is tested, by short to the first foot 1 of terminal 104, crus secunda 2 and the 3rd foot 3
Road connects.
In one embodiment, above-mentioned television board test circuit also includes mainboard chip 103, mainboard chip
103 are used for processing audio-video signal and the control of I/O mouth.The power switch control signal output of mainboard chip 103
The power switch control signal input electrical connection of end and VCC power supply control circuit 101, mainboard chip 103
Backlight illumination control signal outfan and backlight drive control circuit 102 backlight illumination control signal input
End connects.
When being embodied as, mainboard chip 103 exports ON/OFF control signal, is used for controlling VCC for automatically controlled
The power supply state of circuit 101 processed.When ON/OFF control signal is high level, VCC power supply control circuit
101 power to backlight drive control line road 102；When ON/OFF control signal is low level, VCC supplies
Electric control circuit 101 ends powers to backlight drive control line road 102.Mainboard chip 103 also exports ADJ
Control signal, is used for controlling backlight illumination；When ADJ control signal is low level, backlight is extinguished, and works as ADJ
When 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 electricity of mainboard chip 103
Source circuit, high level signal is 3.3V signal.I.e. the first foot 1 of terminal 104 meets the 3V3 of mainboard chip 103
Signal.
In the specific implementation, receive when the power switch control signal input of VCC power supply control circuit 101
During to high level signal, VCC power supply control circuit 101 supplies VCC electricity to backlight drive control line road 102
Source；When the power switch control signal input of VCC power supply control circuit 101 receives low level signal,
VCC power supply control circuit 101 ends supplies VCC power supply to backlight drive control line road 102.
When the backlight illumination control signal input that backlight drive controls circuit 102 receives high level signal,
It is the brightest that backlight drive control circuit 102 controls backlight illumination；When the backlight of backlight drive control circuit 102 is bright
When degree control signal input receives low level signal, backlight drive controls circuit 102 and controls backlight extinguishing；
When backlight drive controls the signal that receives of backlight illumination control signal input of circuit 102 at 0%-100%
Between change in duty cycle time, backlight drive control circuit 102 control backlight illumination according to change in duty cycle.
In television board production process, need television board is tested, to check the conjunction of television board
Lattice rate, test process is divided into preliminary survey, aging and repetition measurement three phases.Specific as follows:
The test being carried out television board includes preliminary survey and repetition measurement；Television board is being carried out preliminary survey and repetition measurement
Time, utilize tool thimble directly by the first foot 1 of terminal 104, crus secunda 2 and the short circuit of the 3rd foot 3, make height
The backlight that the high level signal of level supply line 105 output is transferred to backlight drive control circuit 102 is bright
Degree control signal input and the power switch control signal input of VCC power supply control circuit 101.The most just
It is to say, in preliminary survey, repetition measurement station, by terminal 104, high level signal (such as 3.3V signal) is guided to
Backlight drive controls the backlight illumination control signal input of circuit 102 and VCC power supply control circuit 101
Power switch control signal input, with lit at maximum brightness backlight judge back facet current whether specification it
In.
Further, the test carried out television board also includes burn-in test；Television board is being carried out
During burn-in test, utilize wire rod by the first foot 1 of terminal 104, crus secunda 2 and the short circuit of the 3rd foot 3, pass through
The high level signal transmission that high level supply line 105 is exported by wire rod controls circuit 102 to backlight drive
The power switch control signal input of backlight illumination control signal input and VCC power supply control circuit 101
End.In aging station, on aging wire rod, increase a wire rod with 3 stitch, and the 3 of this wire rod
Individual stitch be short circuit together, this wire rod is inserted on 3 feet of the terminal 104 on plate time aging, will
High level signal (such as 3.3V signal) is guided to backlight drive and is controlled the backlight illumination control signal of circuit 102
Input and the power switch control signal input of VCC power supply control circuit 101, thus start backlight line
Road continuous firing are aging, aging complete after again this wire rod is extracted.
The embodiment of the present invention also provides for a kind of television board method of testing, may apply to the electricity of above-described embodiment
Depending in board test circuit, 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 includes the first foot, crus secunda and the 3rd foot,
Described first foot connects high level supply line, and the backlight that described crus secunda connects backlight drive control circuit is bright
Degree control signal input, the power switch control signal that described 3rd foot connects VCC power supply control circuit is defeated
Enter end；Wherein, described VCC power supply control circuit is for controlling line feed VCC to described backlight drive
Power supply, the VCC power output end of described VCC power supply control circuit controls circuit with described backlight drive
VCC power input electrically connects；Described backlight drive controls circuit for driving the backlight lighting television board
Module；Described high level supply line is used for exporting high level signal；
S2, described television board is tested, by short to the first foot of described terminal, crus secunda and the 3rd foot
Road connects, and the high level signal making described high level supply line export is transferred to described VCC power supply control
The power switch control signal input of circuit, controls described VCC power supply control circuit to described backlight drive
Control line feed VCC power supply；Meanwhile, the high level signal making described high level supply line export is passed
Transport to described backlight drive and control the backlight illumination control signal input of circuit, described backlight drive control line
It is the brightest that road controls backlight illumination；
S3, judge the size of back facet current of described television board whether in the threshold range of regulation, if so,
Then judge that described television board is qualified, if it is not, then judge that described television board is defective.
In an optional implementation, described television board is configured with mainboard chip, described mainboard core
Sheet is used for processing audio-video signal and I/O mouth controls；The power switch control signal outfan of described mainboard chip
Electrically connect with the power switch control signal input of described VCC power supply control circuit, described mainboard chip
Backlight illumination control signal outfan and described backlight drive control the backlight illumination control signal input of circuit
Connect；Described high level supply line is the 3V3 power circuit of described mainboard chip, described high level signal
For 3.3V signal.
When being embodied as, when the power switch control signal input of described VCC power supply control circuit receives
During high level signal, described VCC power supply control circuit controls line feed VCC electricity to described backlight drive
Source；
When the power switch control signal input of described VCC power supply control circuit receives low level signal
Time, the cut-off of described VCC power supply control circuit controls line feed VCC power supply to described backlight drive；
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal
Time, it is the brightest that described backlight drive controls circuit control backlight illumination；
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal
Time, described backlight drive controls circuit and controls backlight extinguishing；
The signal received when the backlight illumination control signal input of described backlight drive control circuit exists
During change in duty cycle between 0%-100%, described backlight drive controls circuit and controls backlight illumination and account for according to described
Empty than change.
More specifically, the test to television board includes preliminary survey, repetition measurement and burn-in test, specific as follows:
When described television board is carried out preliminary survey and repetition measurement, utilize tool thimble directly by the of described terminal
One foot, crus secunda and the short circuit of the 3rd foot, the high level signal making described high level supply line export is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control circuit is controlled to described backlight drive
Power switch control signal input.
When described television board is carried out burn-in test, utilize wire rod by the first foot of described terminal, second
Foot and the short circuit of the 3rd foot, the high level signal described high level supply line exported by described wire rod is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control circuit is controlled to described backlight drive
Power switch control signal input.
It should be noted that above-described embodiment only with high level supply line as mainboard chip 3V3 power supply electricity
Being described as a example by road, in the middle of being embodied as, high level supply line can be an independent circuit,
The high level signal exported can be 3.3V, 5V etc..
The television board that the embodiment of the present invention provides tests circuit and method of testing, is used as by leading-in terminal
VCC power supply control line work whether control end and whether brightness of backlight is set to the brightest control end,
Achieve conveniently and efficiently in test process and need to control circuit and above-mentioned VCC for automatically controlled to above-mentioned backlight drive
Circuit processed provides the purpose of high level.The test process of the embodiment of the present invention need not write formula, is also not required to
Want burned formula.After being completed, directly take off tool thimble or wire rod, it is not necessary to the extra button that increases is tied
Bundle test process.Compared with measurement circuit of the prior art, the embodiment of the present invention is succinctly efficient, decreases
The workload of television board test, improves television board testing efficiency, and circuit structure is simple, cost
Low.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, this
A little improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a television board test circuit, it is characterised in that include VCC power supply control circuit, backlight
Drive and control circuit, terminal and high level supply line；
Described VCC power supply control circuit is for controlling line feed VCC power supply, institute to described backlight drive
State the VCC power output end of VCC power supply control circuit and the VCC power supply of described backlight drive control circuit
Input electrically connects；
Described backlight drive controls circuit for driving the backlight module lighting television board；
Described high level supply line is used for exporting high level signal；
Described terminal includes that the first foot, crus secunda and the 3rd foot, described first foot connect described high level and power
Circuit, described crus secunda connects described backlight drive and controls the backlight illumination control signal input of circuit, institute
State the 3rd foot and connect the power switch control signal input of described VCC power supply control circuit；
When described television board is tested, by short to the first foot of described terminal, crus secunda and the 3rd foot
Road connects；
Described television board test circuit also includes that mainboard chip, described mainboard chip are used for processing audio frequency and video letter
Number and I/O mouth control；
The power switch control signal outfan of described mainboard chip and the power supply of described VCC power supply control circuit
Switch controlling signal input electrically connects, the backlight illumination control signal outfan of described mainboard chip and described
Backlight drive controls the backlight illumination control signal input of circuit and connects；
Described high level supply line is the power circuit of described mainboard chip.
2. television board test circuit as claimed in claim 1, it is characterised in that described high level signal
For 3.3V signal.
3. television board test circuit as claimed in claim 2, it is characterised in that when described VCC supplies
When the power switch control signal input of electric control circuit receives high level signal, described VCC is for automatically controlled
Circuit processed controls line feed VCC power supply to described backlight drive；
When the power switch control signal input of described VCC power supply control circuit receives low level signal
Time, the cut-off of described VCC power supply control circuit controls line feed VCC power supply to described backlight drive；
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal
Time, it is the brightest that described backlight drive controls circuit control backlight illumination；
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal
Time, described backlight drive controls circuit and controls backlight extinguishing；
The signal received when the backlight illumination control signal input of described backlight drive control circuit exists
During change in duty cycle between 0%-100%, described backlight drive controls circuit and controls backlight illumination and account for according to described
Empty than change.
4. television board test circuit as claimed in claim 3, it is characterised in that at the beginning of described test includes
Survey and repetition measurement；
When described television board is carried out preliminary survey and repetition measurement, utilize tool thimble directly by the of described terminal
One foot, crus secunda and the short circuit of the 3rd foot, the high level signal making described high level supply line export is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control circuit is controlled to described backlight drive
Power switch control signal input.
5. television board test circuit as claimed in claim 3, it is characterised in that described test includes always
Change test；
When described television board is carried out burn-in test, utilize wire rod by the first foot of described terminal, second
Foot and the short circuit of the 3rd foot, the high level signal described high level supply line exported by described wire rod is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control circuit is controlled to described backlight drive
Power switch control signal input.
6. a television board method of testing, it is characterised in that including:
Configuring a terminal on television board, described terminal includes the first foot, crus secunda and the 3rd foot, institute
Stating the first foot and connect high level supply line, described crus secunda connects backlight drive and controls the backlight illumination of circuit
Control signal input, described 3rd foot connects the power switch control signal input of VCC power supply control circuit
End；Wherein, described VCC power supply control circuit is for controlling line feed VCC electricity to described backlight drive
Source, the VCC power output end of described VCC power supply control circuit controls the VCC of circuit with described backlight drive
Power input electrically connects；Described backlight drive controls circuit for driving the backlight module lighting television board；
Described high level supply line is used for exporting high level signal；
Described television board is tested, by the first foot of described terminal, crus secunda and the 3rd foot short circuit even
Connecing, the high level signal making described high level supply line export is transferred to described VCC power supply control circuit
Power switch control signal input, control described VCC power supply control circuit and control to described backlight drive
Line feed VCC power supply；Meanwhile, the high level signal making described high level supply line export is transferred to
Described backlight drive controls the backlight illumination control signal input of circuit, and described backlight drive controls circuit control
Backlight illumination processed is the brightest；
Judge the size of back facet current of described television board whether in the threshold range of regulation, the most then
Judge that described television board is qualified, if it is not, then judge that described television board is defective；
Being configured with mainboard chip on described television board, described mainboard chip is used for processing audio-video signal and I/O
Mouth controls；
The power switch control signal outfan of described mainboard chip and the power supply of described VCC power supply control circuit
Switch controlling signal input electrically connects, the backlight illumination control signal outfan of described mainboard chip and described
Backlight drive controls the backlight illumination control signal input of circuit and connects；
Described high level supply line is the power circuit of described mainboard chip.
7. television board method of testing as claimed in claim 6, it is characterised in that described high level signal
For 3.3V signal.
8. television board method of testing as claimed in claim 7, it is characterised in that when described VCC supplies
When the power switch control signal input of electric control circuit receives high level signal, described VCC is for automatically controlled
Circuit processed controls line feed VCC power supply to described backlight drive；
When the power switch control signal input of described VCC power supply control circuit receives low level signal
Time, the cut-off of described VCC power supply control circuit controls line feed VCC power supply to described backlight drive；
When the backlight illumination control signal input of described backlight drive control circuit receives high level signal
Time, it is the brightest that described backlight drive controls circuit control backlight illumination；
When the backlight illumination control signal input of described backlight drive control circuit receives low level signal
Time, described backlight drive controls circuit and controls backlight extinguishing；
The signal received when the backlight illumination control signal input of described backlight drive control circuit exists
During change in duty cycle between 0%-100%, described backlight drive controls circuit and controls backlight illumination and account for according to described
Empty than change.
9. television board method of testing as claimed in claim 8, it is characterised in that at the beginning of described test includes
Survey and repetition measurement；
When described television board is carried out preliminary survey and repetition measurement, utilize tool thimble directly by the of described terminal
One foot, crus secunda and the short circuit of the 3rd foot, the high level signal making described high level supply line export is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control circuit is controlled to described backlight drive
Power switch control signal input.
10. television board method of testing as claimed in claim 8, it is characterised in that described test includes
Burn-in test；
When described television board is carried out burn-in test, utilize wire rod by the first foot of described terminal, crus secunda
With the 3rd foot short circuit, the high level signal described high level supply line exported by described wire rod is transmitted
The backlight illumination control signal input of circuit and described VCC power supply control is controlled to described backlight drive
The power switch control signal input of circuit.
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| CN201310671397.2A CN103647964B (en) | 2013-12-10 | 2013-12-10 | Television board test circuit and method of testing |
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| CN201310671397.2A CN103647964B (en) | 2013-12-10 | 2013-12-10 | Television board test circuit and method of testing |
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| CN103647964B true CN103647964B (en) | 2016-08-17 |
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| 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)
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