CN108873399A - A kind of detection method and system of LCD display module backlight luminescence uniformity - Google Patents
A kind of detection method and system of LCD display module backlight luminescence uniformity Download PDFInfo
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- CN108873399A CN108873399A CN201810629713.2A CN201810629713A CN108873399A CN 108873399 A CN108873399 A CN 108873399A CN 201810629713 A CN201810629713 A CN 201810629713A CN 108873399 A CN108873399 A CN 108873399A
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- lcd display
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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
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Computer Hardware Design (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention discloses a kind of detection methods of LCD display module backlight luminescence uniformity, including：S1. LCD display module to be measured is adjusted to white picture；S2. multiple corresponding brightness values in display area in LCD display module to be measured are obtained respectively using multiple camera modules；S3. the detecting whether as qualification of LCD display module backlight luminescence uniformity to be measured is judged according to the brightness value.By the present invention in that with the picture of more camera module shooting LCD display module multiple and different display areas under white picture, LCD display module uniformity of luminance is detected by calculating the difference for multiple and different display area brightness 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 field of display technology, more particularly to a kind of LCD display module backlight luminescence uniformity
Detection method and system.
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 luminescence uniformity 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 following disadvantages：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, the performance of erroneous judgement product is easy, in control
It is also poor in terms of the display effects such as product brightness consistency；And working efficiency is also very low.
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 luminescence uniformity
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 luminescence uniformity, including：
S1. LCD display module to be measured is adjusted to white picture；
S2. multiple corresponding brightness values in display area in LCD display module to be measured are obtained respectively using multiple camera modules；
S3. the detecting whether as qualification of LCD display module backlight luminescence uniformity to be measured is judged according to the brightness value.
Further, in step S2, the display area of LCD display module is averagely divided into four area to be tested, it will
Four camera modules are respectively aligned to the center of each area to be tested, obtain the brightness value of each area to be tested.
Inventor has found by numerous studies, and the display area of LCD display module is averagely divided into four areas to be detected
Four camera modules are respectively aligned to the center of each area to be tested, obtain the brightness value of each area to be tested, no by domain
The accuracy of detection only can be improved, and at low cost.
Further, in step S3, the maximum brightness value and minimum luminance value in the brightness value of each area to be tested are obtained,
The difference of maximum brightness value and minimum luminance value is calculated, and by the difference compared with a preset luminance threshold, when the difference
When value is greater than the degree threshold value, then judge that the detection of LCD display module uniformity of luminance to be measured is unqualified.
A kind of detection system of LCD display module backlight luminescence uniformity, including：
Detection platform, for installing LCD display module to be measured；
Multiple camera modules are located above LCD display module to be measured, for detecting LCD display module difference display area
Brightness value；
Uniformity judgment module, the difference of the maximum brightness value and minimum luminance value in brightness value for obtaining different display areas
Value, and by the difference compared with a preset luminance threshold, when the difference is greater than the degree threshold value, then judge to be measured
The detection of LCD display module uniformity of luminance is unqualified.
It further, further include setup module, for presetting one for determining that LCD display module backlight luminescence is uniform
The luminance threshold of property.
Further, further include a substrate, set on the substrate there are four camera module, each camera module is corresponding
The center of four area to be tested in LCD display module to be measured display area.
Further, the LCD display module to be measured display area is averagely divided into four area to be tested.
The present invention has the advantages that：
By the present invention in that shooting LCD display module multiple and different display areas under white picture with more camera modules
Picture detects LCD display module hair by calculating the difference for multiple and different display area brightness values that camera module obtains
Accuracy in detection not only can be improved in optical uniformity, reduces the subjectivity artificially judged, but also can retain testing number
According to convenient retrospect and check to bad products.
The present invention is used for the detection of LCD display module backlight luminescence uniformity, has speed fast, at low cost, easy to operate,
Convenient, safe and reliable advantage.
Specific embodiment
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.
Embodiment 1
A kind of detection method of LCD display module backlight luminescence uniformity, including：
S1. LCD display module to be measured is mounted in detection platform, LCD display module to be measured is adjusted to white picture；
S2. the display area of LCD display module is averagely divided into four area to be tested, four camera modules is distinguished
It is directed at the center of each area to be tested, obtains the brightness value of each area to be tested；
S3. it obtains the maximum brightness value and minimum luminance value in the brightness value of each area to be tested, calculates maximum brightness value and most
The difference of small brightness value, and by the difference compared with a preset luminance threshold, when the difference is greater than the degree threshold value,
Then judge that the detection of LCD display module uniformity of luminance to be measured is unqualified.
Embodiment 2
A kind of detection system of LCD display module backlight luminescence uniformity, including：
Detection platform, for installing LCD display module to be measured；
Four camera modules are located above LCD display module to be measured, for detecting LCD display module difference display area
Brightness value；
Uniformity judgment module, the difference of the maximum brightness value and minimum luminance value in brightness value for obtaining different display areas
Value, and by the difference compared with a preset luminance threshold, when the difference is greater than the degree threshold value, then judge to be measured
The detection of LCD display module uniformity of luminance is unqualified；
Setup module, for presetting one for determining the luminance threshold of LCD display module backlight luminescence uniformity.
Wherein, four camera modules are set on a substrate, and each camera module corresponds to LCD display module to be measured and shows
The center of four area to be tested in region；The LCD display module to be measured display area is averagely divided into four areas to be detected
Domain.
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 white picture and obtains LCD display module output picture
Brightness value.
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 (7)
1. a kind of detection method of LCD display module backlight luminescence uniformity, including：
S1. LCD display module to be measured is adjusted to white picture；
S2. multiple corresponding brightness values in display area in LCD display module to be measured are obtained respectively using multiple camera modules；
S3. the detecting whether as qualification of LCD display module backlight luminescence uniformity to be measured is judged according to the brightness value.
2. 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 area to be tested are divided into, four camera modules are respectively aligned to the center of each area to be tested, are obtained each
The brightness value of area to be tested.
3. detection method as claimed in claim 2, which is characterized in that in step S3, obtain the brightness value of each area to be tested
In maximum brightness value and minimum luminance value, calculate the difference of maximum brightness value and minimum luminance value, and by the difference and one
Preset luminance threshold compares, and when the difference is greater than the degree threshold value, then judges LCD display module uniformity of luminance to be measured
Detection it is unqualified.
4. a kind of detection system of LCD display module backlight luminescence uniformity, including：
Detection platform, for installing LCD display module to be measured；
Multiple camera modules are located above LCD display module to be measured, for detecting LCD display module difference display area
Brightness value；
Uniformity judgment module, the difference of the maximum brightness value and minimum luminance value in brightness value for obtaining different display areas
Value, and by the difference compared with a preset luminance threshold, when the difference is greater than the degree threshold value, then judge to be measured
The detection of LCD display module uniformity of luminance is unqualified.
5. detection system as claimed in claim 4, which is characterized in that further include setup module, be used for for presetting one
Determine the luminance threshold of LCD display module backlight luminescence uniformity.
6. detection system as claimed in claim 4, which is characterized in that further include a substrate, set on the substrate there are four taking the photograph
As head mould group, each camera module corresponds to the center of four area to be tested in LCD display module to be measured display area.
7. detection system as claimed in claim 6, which is characterized in that averagely draw the LCD display module to be measured display area
It is divided into four area to be tested.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810629713.2A CN108873399A (en) | 2018-06-19 | 2018-06-19 | A kind of detection method and system of LCD display module backlight luminescence uniformity |
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| CN201810629713.2A CN108873399A (en) | 2018-06-19 | 2018-06-19 | A kind of detection method and system of LCD display module backlight luminescence uniformity |
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Cited By (5)
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| CN109946859A (en) * | 2019-04-09 | 2019-06-28 | 深圳市华星光电半导体显示技术有限公司 | The detection method and device of backlight module |
| 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 |
| CN112634754A (en) * | 2020-12-09 | 2021-04-09 | Oppo广东移动通信有限公司 | Optical module, uniformity adjusting method and head-mounted equipment |
| CN113218962A (en) * | 2021-04-27 | 2021-08-06 | 京东方科技集团股份有限公司 | Display defect detection device, detection method thereof and display defect detection system |
| CN115753015A (en) * | 2022-11-08 | 2023-03-07 | 广东艾斯谱光电科技有限公司 | MINI LED luminescence detection method and system |
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| CN115753015A (en) * | 2022-11-08 | 2023-03-07 | 广东艾斯谱光电科技有限公司 | MINI LED luminescence detection method and system |
| CN115753015B (en) * | 2022-11-08 | 2023-08-22 | 广东艾斯谱光电科技有限公司 | MINI LED Luminescence Detection Method and System |
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Application publication date: 20181123 |