CN107450205A - A kind of LCM screens method of testing and its device - Google Patents
A kind of LCM screens method of testing and its device Download PDFInfo
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- CN107450205A CN107450205A CN201710699767.1A CN201710699767A CN107450205A CN 107450205 A CN107450205 A CN 107450205A CN 201710699767 A CN201710699767 A CN 201710699767A CN 107450205 A CN107450205 A CN 107450205A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The invention discloses a kind of LCM screens method of testing, comprise the following steps：Obtain optical parametric of the LCM screens to be tested under different test conditions；Judge whether LCM screens to be tested are qualified products according to the optical parametric；A kind of LCM screens test device, including optical parametric acquiring unit are also disclosed, for obtaining optical parametric of the LCM screens to be tested under different test conditions；Test cell, for judging whether LCM screens to be tested are qualified products according to the optical parametric.The present invention judges whether LCM screens to be tested are qualified products by obtaining optical parametric of the LCM screens to be tested under different test conditions, and according to the optical parametric；The intelligent test of LCM screens is realized, compared with prior art, LCM screen testing efficiencies is improved, reduces test False Rate.
Description
Technical field
The present invention relates to LCM screen testing fields, especially a kind of LCM screens method of testing and its device.
Background technology
MIPI：Mobile Industry Processor Interface, mobile Industry Processor Interface；
LCM：Liquid Crystal Display Module, LCD MODULE；
FPGA：Field-Programmable Gate Array, field programmable gate array；
SDRAM：Synchronous Dynamic Random Access Memory, synchronous DRAM；
Contrast：White picture brightness and the ratio of black picture brightness；
Brightness：Refer to the brightness measured under white picture；
CCD:Charge-coupled Device, charge coupling device imaging sensor.
In recent years, with expanding economy and the raising of living standards of the people, consumption demand upgrading of the people to mobile phone is changed
Also increasingly faster for frequency, almost annual major mobile phone brand has the flagship machine issue of oneself.As the most important portion of mobile phone
One of part, the uniformity of LCM screen display effects are also increasingly paid attention to by consumer.For mobile phone LCM screens production always
Since belong to labour intensive profession, especially for the back segment test step of LCM screens.LCM screens test at present is substantially all complete
Completed by manpower, rule of thumb carry out the display effect of test judgement LCM screens using human eye by employee, have the following disadvantages：One
Aspect, because how much different employees have different errors in terms of visual experience, cause the degree of accuracy of test low；On the other hand,
LCM screen tests are carried out by human eye under dark room conditions for a long time, are also a kind of injury in itself to human eye, and expend tester
The muscle power and eyesight of member；Human eye easily produces sense tired out, easily judges the performance of product by accident, aobvious in the brightness of control product, color etc.
Show that same effect aspect is also poor；And operating efficiency is also very low.
The content of the invention
In order to solve the above-mentioned technical problem, realize LCM screens intelligent test it is an object of the invention to provide one kind and can carry
The LCM screens method of testing and its device of high LCM screens testing efficiency.
The technical solution adopted in the present invention is：A kind of LCM screens method of testing, comprises the following steps：
Obtain optical parametric of the LCM screens to be tested under different test conditions；
Judge whether LCM screens to be tested are qualified products according to the optical parametric.
Further, the LCM screens method of testing includes step S1：
S1, optical parametric of the LCM screens to be tested under white picture is obtained, the optical parametric includes the brightness of LCM screens
And/or chromaticity coordinate and/or colour temperature；
Optical parametric of the LCM screens to be tested under white picture is judged whether in the range of the first preset optical parameters, if
Judged result is yes, then judges that LCM screens to be tested are qualified or into next step；If judged result is no, judge to be tested
LCM screens are unqualified.
Further, the LCM screens method of testing includes step S2：
S2, obtain brightness of the LCM screens to be tested under black picture；
LCM screens to be tested are obtained according to brightness of the LCM screens under black picture to be tested and the brightness under white picture
Contrast；
Judge whether the contrast of LCM screens to be tested is equal to default contrast, if the determination result is YES, then judge to be tested
LCM screens are qualified or into next step；If judged result is no, judge that LCM screens to be tested are unqualified.
Further, the LCM screens method of testing includes step S3：
S3, obtain optical parametric of the LCM screens to be tested under red and/or green and/or blue picture, the Optical Parametric
Number includes brightness and/or chromaticity coordinate and/or the colour temperature of LCM screens；
Judge whether optical parametric of the LCM screens to be tested under red and/or green and/or blue picture be default second
In the range of optical parametric, the second preset optical parameters scope includes red and/or green and/or blue picture preset optical
Parameter area；
If the determination result is YES, then judge that LCM screens to be tested are qualified or into next step；If judged result is no,
Judge that LCM screens to be tested are unqualified.
Further, the acquisition methods of the first preset optical parameters scope and/or the second preset optical parameters scope
For：
Obtain optical parametric of the LCM screens to be tested under test pictures of predetermined number, the test pictures for white and/
Or red and/or green and/or blue picture, the optical parametric include brightness and/or chromaticity coordinate and/or the color of LCM screens
Temperature；
Obtain the average value of different optical parametrics under different test pictures；
The pre-set tolerance of different optical parametrics is set；
According to the average value of the different optical parametrics under the different test pictures and the pre-set tolerance of the optical parametric
Obtain the first preset optical parameters scope and/or the second preset optical parameters scope.
Further, the LCM screens method of testing also includes step S4：
Show the test judged result of LCM screens to be tested.
Another technical scheme of the present invention is：A kind of LCM screens test device, including
Optical parametric acquiring unit, for obtaining optical parametric of the LCM screens to be tested under different test conditions；
Test cell, for judging whether LCM screens to be tested are qualified products according to the optical parametric.
Further, the LCM screens test device also includes
Display unit, for showing the test judged result of LCM screens to be tested.
Further, the optical parametric acquiring unit is display color analyzer.
Further, the test cell includes power circuit, FPGA governor circuits, storage circuit, LCM screen drive circuits
With jtag interface circuit；
The power circuit is used to provide working power for LCM screen test devices；The FPGA governor circuits and storage electricity
Road connects；The output end of the FPGA governor circuits is connected with the input of LCM screen drive circuits；The LCM screens drive circuit
Output end be connected with the input of LCM screens to be tested；The output end of the jtag interface circuit, optical parametric acquiring unit
Input of the output end with FPGA governor circuits is connected.
The beneficial effects of the invention are as follows：
The present invention is by obtaining optical parametric of the LCM screens to be tested under different test conditions, and according to the Optical Parametric
Number judges whether LCM screens to be tested are qualified products；The intelligent test of LCM screens is realized, compared with prior art, is improved
The testing efficiency of LCM screens, reduce test False Rate.
Brief description of the drawings
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is an a kind of specific embodiment structural representation of LCM screens test device in the present invention；
Fig. 2 is an a kind of specific embodiment circuit diagram of the FPGA governor circuits of LCM screens test device in the present invention；
Fig. 3 is an a kind of specific embodiment circuit of the SDRAM circuits of the storage circuit of LCM screens test device in the present invention
Figure；
Fig. 4 is an a kind of specific embodiment of the SD card storage circuit of the storage circuit of LCM screens test device in the present invention
Circuit diagram；
Fig. 5 is an a kind of specific embodiment circuit diagram of the jtag interface circuit of LCM screens test device in the present invention；
Fig. 6 is an a kind of specific embodiment circuit diagram of the key circuit of LCM screens test device in the present invention；
Fig. 7 is an a kind of specific embodiment circuit diagram of the power circuit of LCM screens test device in the present invention；
Fig. 8 is an a kind of specific embodiment flow chart of LCM screens method of testing in the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.
A kind of LCM screens test device, including
Optical parametric acquiring unit, for obtaining optical parametric of the LCM screens to be tested under different test conditions；
Test cell, for judging whether LCM screens to be tested are qualified products according to optical parametric.
The intelligence test to LCM screens is realized using LCM screen test devices, instead of original manual testing, improves LCM screens
Testing efficiency, reduce the test False Rates of LCM screens, improve the quality of LCM screens.
Further, with reference to figure 1, Fig. 1 is an a kind of specific embodiment structural representation of LCM screens test device in the present invention
Figure；Optical parametric acquiring unit is display color analyzer；Test cell includes power circuit, FPGA governor circuits, storage
Circuit, LCM screens drive circuit and jtag interface circuit；Power circuit is used to provide working power for LCM screen test devices；Power supply
The input of the output end of the circuit input with FPGA governor circuits, the input of storage circuit, LCM screen drive circuits respectively
End, the input connection of jtag interface circuit；FPGA governor circuits are connected with storage circuit；The output end of FPGA governor circuits with
The input connection of LCM screen drive circuits；The output end of LCM screen drive circuits is connected with the input of LCM screens to be tested；JTAG
The input of the output end of interface circuit, the output end of display color analyzer with FPGA governor circuits is connected.
Further, FPGA governor circuits be EP4CE10F17C8N programmable logic chips and its peripheral circuit or
EP2C8Q208C8N programmable logic chips and its peripheral circuit.LCM screens drive circuit is SSD2828 chips and its periphery electricity
Road, LCM screens drive circuit are connected by MIPI interfaces with LCM screens to be tested.With reference to figure 2, Fig. 2 is a kind of LCM screens in the present invention
One specific embodiment circuit diagram of the FPGA governor circuits of test device；In the present embodiment, FPGA governor circuits are
EP2C8Q208C8N programmable logic chips U1 and its peripheral circuit, now, the configurable LCM screens all the way of LCM screens test device drive
Dynamic circuit, realizes that the driving to one piece of LCM screen is shown to test；And when FPGA governor circuits are that EP4CE10F17C8N can
When programmed logic chip and its peripheral circuit, LCM screens test device can configure two-way LCM screen drive circuits, can be achieved to two pieces
The driving of LCM screens is shown to be tested.In the present invention, display color analyzer uses the display color of CA-310 models
Analyzer, the display color analyzer of CA-310 models carry test probe, and display color analyzer is treated for completion
Test the optical parametric collection of LCM screens；Storage circuit includes SDRAM circuits and SD card storage circuit, and SDRAM circuits, SD card are deposited
Storing up electricity Lu Junyu FPGA governor circuits connect.SDRAM circuits are system data buffer circuit, and SD card storage circuit, which is used to store, to be surveyed
Try data, such as test pictures.It is a kind of storage circuit of LCM screens test device in the present invention with reference to figure 3 and Fig. 4, Fig. 3
One specific embodiment circuit diagram of SDRAM circuits；Fig. 4 is a kind of SD card of the storage circuit of LCM screens test device in the present invention
One specific embodiment circuit diagram of storage circuit；SDRAM circuits using HY57V641620F models SDRAM chips (such as U9 and
U2) realize；SD card storage circuit includes SD card card reader J3, and SD card is put into SD card card reader J3.Finally, jtag interface electricity
Road is used for external other equipment to update the test program of LCM screen test devices；With reference to figure 5, Fig. 5 is a kind of LCM in the present invention
Shield a specific embodiment circuit diagram of the jtag interface circuit of test device；Jtag interface circuit includes jtag interface J1.
Further, LCM screens test device also includes display unit, for showing that the test of LCM screens to be tested judges knot
Fruit.With reference to figure 1, display unit is display circuit, and the output end of power circuit and the input of display circuit connect；FPGA master controls
The output end of circuit and the input of display circuit connect；In the present embodiment, display circuit is LCDs and its periphery electricity
Road, display circuit is used for the test mode and test result for showing LCM screens, when FPGA governor circuits judge the test knot of LCM screens
Fruit be by when, then control LCDs show " PASS "；When FPGA governor circuits judge the test results of LCM screens not lead to
It is out-of-date, that is, control LCDs to show " NG ".
Further, LED cue circuits, the output end of FPGA governor circuits are also included with reference to figure 1, LCM screens test device
It is connected with the input of LED cue circuits.LED cue circuits include LED；LED cue circuits are set to be used for condition prompting, can
To prompt test result, when test result be by when, the LED glow green of LED cue circuits；When test result is not lead to
It is out-of-date, LED burn red；Can also be used to prompt LCM screens to be tested connection whether, when LCM screens to be tested and LCM screens drive
During dynamic circuit connection, FPGA governor circuits control LED shows green light；On the contrary, LCM screens to be tested do not drive electricity with LCM screens
When road connects, LED burn red.
Further, with reference to figure 1, LCM screens test device also includes key circuit, output end and the FPGA master of key circuit
Control the input connection of circuit.Key circuit is used to control testing process, can control the switch of test device.With reference to figure 6, figure
6 be an a kind of specific embodiment circuit diagram of the key circuit of LCM screens test device in the present invention；Key circuit includes multiple press
Key, such as S1, S2, S3, S4 and S5 in Fig. 6.With reference to figure 7, Fig. 7 is a kind of power circuit of LCM screens test device in the present invention
A specific embodiment circuit diagram, power circuit be used for produce a variety of different operating voltages, think LCM screens test device not
Corresponding operating voltage is provided with circuit, power circuit includes dc source and voltage conversion circuit, the output end of dc source
It is connected with the input of voltage conversion circuit, as shown in fig. 7, dc source inputs from interface J6, voltage conversion circuit includes more
Kind voltage conversion chip, such as U5, U3, U16, U10, U13 and U11, U5, U3, U10, U13 and U11 are LM2596-5.0 models
Switching power source chip, U16 are the low difference voltage regulator of LM1117-ADJ models.
Based on said system, the present invention also provides a kind of LCM screens method of testing, comprised the following steps：
Obtain optical parametric of the LCM screens to be tested under different test conditions；
Judge whether LCM screens to be tested are qualified products according to optical parametric.
The LCM screen method of testings of the present invention realize the intelligence test to LCM screens, instead of original manual testing, improve
The testing efficiency of LCM screens, reduce the test False Rate of LCM screens.
Further, with reference to figure 8, Fig. 8 is an a kind of specific embodiment flow chart of LCM screens method of testing in the present invention；
LCM screens method of testing includes step S1：
S1, obtain the optical parametric of LCM screens to be tested under white picture, optical parametric include LCM screens brightness and/or
Chromaticity coordinate and/or colour temperature；
Optical parametric of the LCM screens to be tested under white picture is judged whether in the range of the first preset optical parameters, if
Judged result is yes, then judges that LCM screens to be tested are qualified or into next step；If judged result is no, judge to be tested
LCM screens are unqualified.
During actual test, in the present embodiment, LCM screens to be tested are gathered under white picture by display color analyzer
Optical parametric, optical parametric includes brightness, chromaticity coordinate and the colour temperature of LCM screens；The parameter measured is pre- with first respectively
If optical parametric scope is contrasted, if the parameter measured in the range of the first preset optical parameters, into next step；
If the parameter measured not in the range of the first preset optical parameters, judges that LCM screens to be tested are unqualified.First preset optical
Parameter area includes luminance reference scope, chromaticity coordinate reference range and the color temperature benchmark scope of the LCM screens under white picture.
Further, step S2 is included with reference to figure 8, LCM screens method of testing：
S2, obtain brightness of the LCM screens to be tested under black picture；
LCM screens to be tested are obtained according to brightness of the LCM screens under black picture to be tested and the brightness under white picture
Contrast；
Judge whether the contrast of LCM screens to be tested is equal to default contrast, if the determination result is YES, then judge to be tested
LCM screens are qualified or into next step；If judged result is no, judge that LCM screens to be tested are unqualified.
During actual test, in the present embodiment, LCM screens to be tested are gathered under black picture by display color analyzer
Optical parametric, optical parametric includes brightness, chromaticity coordinate and the colour temperature of LCM screens；According to the LCM screens to be tested of measurement in white
The brightness under brightness and black picture under picture obtains the contrast of LCM screens, and the contrast of LCM screens and default contrast are entered
Row contrast, if the contrast of LCM screens is equal with default contrast, into next step；If the contrast of LCM screens is not equal to pre-
If contrast, then judge that LCM screens to be tested are unqualified.Here, default contrast can refer to LCD specifications and be configured.
Further, step S3 is included with reference to figure 8, LCM screens method of testing：
S3, obtain optical parametric of the LCM screens to be tested under red and/or green and/or blue picture, optical parametric bag
Include brightness and/or chromaticity coordinate and/or the colour temperature of LCM screens；
Judge whether optical parametric of the LCM screens to be tested under red and/or green and/or blue picture be default second
In the range of optical parametric, the second preset optical parameters scope includes red and/or green and/or blue picture preset optical parameters
Scope；
If the determination result is YES, then judge that LCM screens to be tested are qualified or into next step；If judged result is no,
Judge that LCM screens to be tested are unqualified.
During actual test, in the present embodiment, LCM screens to be tested are gathered in red, green by display color analyzer
With the optical parametric under blue picture, optical parametric includes brightness, chromaticity coordinate and the colour temperature of LCM screens；The parameter that will be measured
Contrasted respectively with the second preset optical parameters scope, if the parameter measured in the range of the second preset optical parameters,
Into next step；If the parameter measured not in the range of the second preset optical parameters, judges that LCM screens to be tested do not conform to
Lattice.Second preset optical parameters scope includes red picture preset optical parameters scope, green picture preset optical parameters scope
With blue picture preset optical parameters scope, red picture preset optical parameters scope includes the bright of the LCM screens under red picture
Spend reference range, chromaticity coordinate reference range and color temperature benchmark scope；Green picture preset optical parameters scope includes green and drawn
Luminance reference scope, chromaticity coordinate reference range and the color temperature benchmark scope of LCM screens under face；Blue picture preset optical parameters
Scope includes luminance reference scope, chromaticity coordinate reference range and the color temperature benchmark scope of the LCM screens under blue picture.
Further, the acquisition methods of the first preset optical parameters scope and/or the second preset optical parameters scope are：
Optical parametric of the LCM screens to be tested of predetermined number under test pictures is obtained, test pictures are white and/or red
Color and/or green and/or blue picture, optical parametric include brightness and/or chromaticity coordinate and/or the colour temperature of LCM screens；
Obtain the average value of different optical parametrics under different test pictures；
The pre-set tolerance of different optical parametrics is set；
First is obtained according to the pre-set tolerance of the average value of the different optical parametrics under different test pictures and optical parametric
Preset optical parameters scope and/or the second preset optical parameters scope.
During actual test, in the present embodiment, predetermined number is arranged to 20 pieces of LCM screens to be tested, and 20 pieces of LCM screens are existed respectively
Brightness, chromaticity coordinate and the colour temperature of different test pictures (such as white picture, red picture) measurement LCM screens, and make even respectively
Average.Using the average value obtained by every optical parametric (brightness of LCM screens, chromaticity coordinate and colour temperature) as corresponding optical parametric
A reference value (i.e. standard reference value).And it is stored in as FPGA governor circuits to handle the standard value of every optical parametric by obtained by
Into corresponding register.The tolerance for assigning the brightness of LCM screens respectively simultaneously is ± 30cd/ ㎡, the tolerance of colour temperature is ± 800, color
The tolerance for spending coordinate is ± 0.03；The optical parametric of LCM screens i.e. under different test pictures (such as white picture, red picture)
Scope is that above-mentioned standard value adds tolerance, for example, the first preset optical parameters scope is each optical parametric under white picture
Standard value adds tolerance, and similarly, the second preset optical parameters scope repeats no more.
Further, step S4 is also included with reference to figure 8, LCM screens method of testing：
Show the test judged result of LCM screens to be tested.
After test result judges, FPGA governor circuits control display circuit shows the test of LCM screens to be tested
As a result, LCM screens are qualified or unqualified, facilitate staff to know test result.
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent variations on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of LCM screens method of testing, it is characterised in that comprise the following steps：
Obtain optical parametric of the LCM screens to be tested under different test conditions；
Judge whether LCM screens to be tested are qualified products according to the optical parametric.
2. a kind of LCM screens method of testing according to claim 1, it is characterised in that the LCM screens method of testing includes step
Rapid S1：
S1, obtain the optical parametric of LCM screens to be tested under white picture, the optical parametric include LCM screens brightness and/or
Chromaticity coordinate and/or colour temperature；
Optical parametric of the LCM screens to be tested under white picture is judged whether in the range of the first preset optical parameters, if judging
As a result it is yes, then judges that LCM screens to be tested are qualified or into next step；If judged result is no, LCM screens to be tested are judged
It is unqualified.
3. a kind of LCM screens method of testing according to claim 2, it is characterised in that the LCM screens method of testing includes step
Rapid S2：
S2, obtain brightness of the LCM screens to be tested under black picture；
The contrast of LCM screens to be tested is obtained according to brightness of the LCM screens under black picture to be tested and the brightness under white picture
Degree；
Judge whether the contrast of LCM screens to be tested is equal to default contrast, if the determination result is YES, then judge LCM to be tested
It is qualified or into next step to shield；If judged result is no, judge that LCM screens to be tested are unqualified.
4. a kind of LCM screens method of testing according to claim 1, it is characterised in that the LCM screens method of testing includes step
Rapid S3：
S3, obtain optical parametric of the LCM screens to be tested under red and/or green and/or blue picture, the optical parametric bag
Include brightness and/or chromaticity coordinate and/or the colour temperature of LCM screens；
Judge optical parametric of the LCM screens to be tested under red and/or green and/or blue picture whether in the second preset optical
In parameter area, the second preset optical parameters scope includes red and/or green and/or blue picture preset optical parameters
Scope；
If the determination result is YES, then judge that LCM screens to be tested are qualified or into next step；If judged result is no, judge
LCM screens to be tested are unqualified.
A kind of 5. LCM screens method of testing according to any one of claim 2 to 4, it is characterised in that the described first default light
Parameter area and/or the acquisition methods of the second preset optical parameters scope are：
Optical parametric of the LCM screens to be tested of predetermined number under test pictures is obtained, the test pictures are white and/or red
Color and/or green and/or blue picture, the optical parametric include brightness and/or chromaticity coordinate and/or the colour temperature of LCM screens；
Obtain the average value of different optical parametrics under different test pictures；
The pre-set tolerance of different optical parametrics is set；
Obtained according to the pre-set tolerance of the average value of the different optical parametrics under the different test pictures and the optical parametric
First preset optical parameters scope and/or the second preset optical parameters scope.
A kind of 6. LCM screens method of testing according to any one of Claims 1-4, it is characterised in that the LCM screens test
Method also includes step S4：
Show the test judged result of LCM screens to be tested.
A kind of 7. LCM screens test device, it is characterised in that including
Optical parametric acquiring unit, for obtaining optical parametric of the LCM screens to be tested under different test conditions；
Test cell, for judging whether LCM screens to be tested are qualified products according to the optical parametric.
8. a kind of LCM screens test device according to claim 7, it is characterised in that the LCM screens test device also includes
Display unit, for showing the test judged result of LCM screens to be tested.
A kind of 9. LCM screens test device according to claim 7 or 8, it is characterised in that the optical parametric acquiring unit
For display color analyzer.
10. a kind of LCM screens test device according to claim 7 or 8, it is characterised in that the test cell includes electricity
Source circuit, FPGA governor circuits, storage circuit, LCM screens drive circuit and jtag interface circuit；
The power circuit is used to provide working power for LCM screen test devices；The FPGA governor circuits connect with storage circuit
Connect；The output end of the FPGA governor circuits is connected with the input of LCM screen drive circuits；The LCM screens drive circuit it is defeated
Go out end to be connected with the input of LCM screens to be tested；The output of the output end, optical parametric acquiring unit of the jtag interface circuit
The input with FPGA governor circuits is held to be connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710699767.1A CN107450205A (en) | 2017-08-16 | 2017-08-16 | A kind of LCM screens method of testing and its device |
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| CN201710699767.1A CN107450205A (en) | 2017-08-16 | 2017-08-16 | A kind of LCM screens method of testing and its device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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