CN108957799A - A kind of detection method of LCD display module backlight uniformity of chromaticity - Google Patents
A kind of detection method of LCD display module backlight uniformity of chromaticity Download PDFInfo
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- CN108957799A CN108957799A CN201810630648.5A CN201810630648A CN108957799A CN 108957799 A CN108957799 A CN 108957799A CN 201810630648 A CN201810630648 A CN 201810630648A CN 108957799 A CN108957799 A CN 108957799A
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- display module
- lcd display
- picture
- chromaticity
- value
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Analytical Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Spectrometry And Color Measurement (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention discloses a kind of detection methods of LCD display module backlight uniformity of chromaticity, comprising: S1. control LCD display module successively shows a variety of sprites；S2. multiple test zones corresponding chromatic value under various sprites in LCD display module to be measured is obtained respectively using multiple camera modules；S3. the detecting whether as qualification of LCD display module backlight uniformity of chromaticity to be measured is judged according to the chromatic value.By the present invention in that with the picture of more camera module shooting LCD display module multiple and different display areas under various sprites, the uniformity of LCD display module backlight coloration is detected by calculating the difference for multiple and different display area chromatic values that camera module obtains, accuracy in detection not only can be improved, reduce the subjectivity artificially judged, but also detection data can be retained, convenient retrospect and check to bad products.
Description
Technical field
The present invention relates to LCD mould group detection technique fields, more particularly to a kind of LCD display module backlight evenness
The detection method of property.
Background technique
LCM (LCD Module) i.e. LCD display module, it is by liquid crystal display, LCD controller, flexible printing
Wiring board, backlight composition.LCD controller adjusts voltage, phase, the frequency being applied on pixel by instruction system
The series of parameters such as rate, peak value, virtual value, timing, duty ratio, characteristic set up certain drive condition, realize various aobvious
Show effect.
The detection of LCD display module backlight uniformity of chromaticity at present is all completed by manpower entirely substantially, by employee according to warp
The display effect for carrying out test judgement LCD display module using human eye is tested, is had the disadvantage in that on the one hand, because different employees are regarding
Feel how much impression aspect has different errors, artificial judgment criteria is different, and it is subjective, cause the accuracy of test low；
On the other hand, the test of LCD display module is carried out by human eye under dark room conditions for a long time, is also a kind of wound to human eye itself
Evil, and expend the physical strength and eyesight of tester；Human eye is easy to produce sense tired out, is easy the performance of erroneous judgement product；And work
It is also very low to make efficiency.
Summary of the invention
In order to make up the defect of prior art, the present invention provides a kind of detection of LCD display module backlight uniformity of chromaticity
Method.
The technical problems to be solved by the invention are achieved by the following technical programs:
A kind of detection method of LCD display module backlight uniformity of chromaticity,
S1. control LCD display module successively shows a variety of sprites；
S2. multiple test zones are obtained in LCD display module to be measured respectively in various sprites using multiple camera modules
Corresponding chromatic value down；
S3. the detecting whether as qualification of LCD display module backlight uniformity of chromaticity to be measured is judged according to the chromatic value.
Further, in step S1, a variety of sprites include white picture, red picture, green picture, blue picture
And grey screen.
Further, in step S1, control LCD display module be successively displayed in white picture, red picture, green picture,
Blue picture and grey screen.
Further, in step S2, the display area of LCD display module is averagely divided into four test zones, by four
A camera module is respectively aligned to the center of each test zone, obtains the chromatic value of each test zone.
Further, in step S3, maximum chrominance of each test zone in the chromatic value under certain sprite is obtained
Value and minimal color value calculate the difference of maximum chrominance value and minimal color value, and by the difference and a preset coloration threshold
Value compares, and when the difference is greater than the Chroma threshold, then judges the detection of LCD display module backlight uniformity of chromaticity to be measured
It is unqualified.
Further, in step S3, under various sprites, the difference of the coloration of each test zone is respectively less than described
When Chroma threshold, then judge that the detection of LCD display module backlight uniformity of chromaticity to be measured is qualified.
The invention has the following beneficial effects:
By the present invention in that shooting LCD display module multiple and different viewing areas under various sprites with more camera modules
The picture in domain shows mould by calculating the difference for multiple and different display area chromatic values that camera module obtains to detect LCD
The uniformity of group backlight coloration, not only can be improved accuracy in detection, reduces the subjectivity artificially judged, but also can protect
Stay detection data, convenient retrospect and check to bad products.
The present invention is used for the detection of LCD display module backlight uniformity of chromaticity, has speed fast, at low cost, easy to operate,
Convenient, safe and reliable advantage.
Specific embodiment
A kind of detection method of LCD display module backlight uniformity of chromaticity,
S1. control LCD display module successively shows a variety of sprites.
A variety of sprites include white picture, red picture, green picture, blue picture and grey screen.Inventor
It is found by numerous studies, detects uniformity of chromaticity of the LCD display module under these types of sprite, detection accuracy respectively
It is higher.
The present invention does not limit the sequence that control LCD display module shows various sprites specifically, and it is aobvious to can control LCD
Show that mould group is successively displayed in red picture, green picture, blue picture, grey screen and white picture, also can control LCD and show
Mould group successively shows green picture, blue picture, grey screen, white picture and red picture, also can control LCD and shows mould
Group is successively displayed in blue picture, grey screen, white picture, red picture and green picture, can also control LCD display module
Successively show grey screen, white picture, red picture, green picture and blue picture.Preferably, control LCD shows mould
Group is successively displayed in white picture, red picture, green picture, blue picture and grey screen.
S2. multiple test zones are obtained in LCD display module to be measured respectively in various monochromes using multiple camera modules
Corresponding chromatic value under picture.
The display area of LCD display module to be measured can be averagely divided into multiple test zones, test section in the present invention
The number in domain can be 3,4,5 or 6, but not limited to this.Preferably, the display area of LCD display module is put down
Four test zones are divided into, four camera modules are respectively aligned to the center of each test zone, obtain each test
Region corresponding chromatic value under various sprites.Inventor has found by numerous studies, by the viewing area of LCD display module
Domain is averagely divided into four test zones, and four camera modules are respectively aligned to the center of each test zone, obtains each
The accuracy of detection not only can be improved in the chromatic value of test zone, but also at low cost.
It should be noted that the present invention does not limit the specific structure composition of camera module, can use existing
Camera module is used to shoot picture of the LCD display module under sprite and obtains LCD display module output picture
Chromatic value.As an example, the camera module includes: camera lens, printed circuit board, imaging sensor, digital signal processor core
Piece (dsp chip, DigitalSignalProcesso).
S3. the detecting whether as qualification of LCD display module backlight uniformity of chromaticity to be measured is judged according to the chromatic value.
Specifically, maximum chrominance value and minimal color of each test zone in the chromatic value under certain sprite are obtained
Value calculates the difference of maximum chrominance value and minimal color value, and by the difference compared with a preset Chroma threshold, when described
When difference is greater than the Chroma threshold, then judge that the detection of LCD display module backlight uniformity of chromaticity to be measured is unqualified；When each
Under kind sprite, when the difference of the coloration of each test zone is respectively less than the Chroma threshold, then LCD display module to be measured is judged
The detection of backlight uniformity of chromaticity is qualified.
It should be noted that the specific value of Chroma threshold of the invention is not particularly limited, it can be according to the reality of product
Border demand is set.
The present invention will now be described in detail with reference to examples, and the examples are only preferred embodiments of the present invention,
It is not limitation of the invention.
A kind of detection method of LCD display module backlight uniformity of chromaticity, includes the following steps:
S1. control LCD display module is successively displayed in white picture, red picture, green picture, blue picture and grey screen；
S2. the display area of LCD display module is averagely divided into four test zones, four camera modules are right respectively
The center of each quasi- test zone, obtains the chromatic value of each test zone under white picture respectively, each under red picture
The chromatic value of test zone, the chromatic value of each test zone under green picture, the coloration of each test zone under blue picture
Value, the chromatic value of each test zone under grey screen；
S3. maximum chrominance value and minimal color value of each test zone in the chromatic value under white picture are obtained, is calculated maximum
The difference A of chromatic value and minimal color value；Obtain maximum chrominance value of each test zone in the chromatic value under red picture and
Minimal color value calculates the difference B of maximum chrominance value and minimal color value；Obtain coloration of each test zone under green picture
Maximum chrominance value and minimal color value in value calculate the difference C of maximum chrominance value and minimal color value；Obtain each test zone
Maximum chrominance value and minimal color value in the chromatic value under blue picture calculate the difference of maximum chrominance value and minimal color value
Value D；Maximum chrominance value and minimal color value of each test zone in the chromatic value under grey screen are obtained, maximum chrominance is calculated
The difference E of value and minimal color value；
By each difference compared with a preset Chroma threshold, when difference A, difference B, difference C, difference D or difference E are greater than described
When Chroma threshold, then judge that the detection of LCD display module backlight uniformity of chromaticity to be measured is unqualified；As difference A, difference B, difference
C, when difference D and difference E are respectively less than the Chroma threshold, then judge the detection of LCD display module backlight uniformity of chromaticity to be measured
It is qualified.
Embodiments of the present invention above described embodiment only expresses, the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as, as long as skill obtained in the form of equivalent substitutions or equivalent transformations
Art scheme should all be fallen within the scope and spirit of the invention.
Claims (6)
1. a kind of detection method of LCD display module backlight uniformity of chromaticity, comprising:
S1. control LCD display module successively shows a variety of sprites；
S2. multiple test zones are obtained in LCD display module to be measured respectively in various sprites using multiple camera modules
Corresponding chromatic value down；
S3. the detecting whether as qualification of LCD display module backlight uniformity of chromaticity to be measured is judged according to the chromatic value.
2. detection method as described in claim 1, which is characterized in that in step S1, a variety of sprites include white picture,
Red picture, green picture, blue picture and grey screen.
3. detection method as described in claim 1, which is characterized in that in step S1, control LCD display module successively shows white
Color picture, red picture, green picture, blue picture and grey screen.
4. detection method as described in claim 1, which is characterized in that in step S2, the display area of LCD display module is put down
Four test zones are divided into, four camera modules are respectively aligned to the center of each test zone, obtain each test
The chromatic value in region.
5. detection method as described in claim 1, which is characterized in that in step S3, obtain each test zone in certain monochrome
Maximum chrominance value and minimal color value in chromatic value under picture calculate the difference of maximum chrominance value and minimal color value, and
By the difference compared with a preset Chroma threshold, when the difference is greater than the Chroma threshold, then judge that LCD to be measured is aobvious
Show that the detection of module group backlight uniformity of chromaticity is unqualified.
6. detection method as claimed in claim 5, which is characterized in that each to test under various sprites in step S3
When the difference of the coloration in region is respectively less than the Chroma threshold, then the inspection of LCD display module backlight uniformity of chromaticity to be measured is judged
It is qualified to survey.
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Cited By (5)
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| CN109752869A (en) * | 2019-01-24 | 2019-05-14 | 四川长虹电器股份有限公司 | The method for detecting liquid crystal WRGB screen optical property |
| CN110299114A (en) * | 2019-06-25 | 2019-10-01 | 深圳Tcl新技术有限公司 | Judgment method, device and the storage medium of show uniformity |
| CN111982477A (en) * | 2020-08-31 | 2020-11-24 | 合肥维信诺科技有限公司 | Testing method and testing device for display panel |
| CN113125117A (en) * | 2021-03-18 | 2021-07-16 | 苏州华兴源创科技股份有限公司 | Display module chroma detection method |
| CN114693656A (en) * | 2022-04-06 | 2022-07-01 | 厦门大学 | Method for detecting display defects of LED display screen and method for calibrating camera and optical filter |
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Application publication date: 20181207 |