CN109298554A - A kind of new method for the foreign matter detecting liquid crystal display - Google Patents
A kind of new method for the foreign matter detecting liquid crystal display Download PDFInfo
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- CN109298554A CN109298554A CN201810239853.9A CN201810239853A CN109298554A CN 109298554 A CN109298554 A CN 109298554A CN 201810239853 A CN201810239853 A CN 201810239853A CN 109298554 A CN109298554 A CN 109298554A
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- foreign matter
- liquid crystal
- crystal display
- picture
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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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- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Liquid Crystal (AREA)
Abstract
LCD display generallys use the mode of artificial observation when detecting Superficial Foreign Body to be detected at present, but uses the foreign matter of artificial observation picture to exist and be easy in fact so that human eye vision is tired, and judgement is inaccurate, causes working efficiency lower.In order to solve problem above, a kind of method that the present invention proposes appearance foreign matter for detecting liquid crystal display.Using the method for the appearance foreign matter of detection liquid crystal display of the invention, it is observed under specific picture without human eye, without use control scale marker compare judgement, but it directlys adopt camera and takes pictures, and by way of computer for analysis, directly judge appearance foreign matter whether within the scope of client can tolerate, simultaneously, the determination method of irregular foreign matter proposed by the present invention can make to the shape discrimination of foreign matter more rapidly and accurately.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more specifically, being related to a kind of the new of the foreign matter of detection liquid crystal display
Method is more specifically related to a kind of method of irregular foreign matter for detecting liquid crystal display.
Background technique
With the fast development of application of the LCD display on laptop, display screen difficulty in processing procedure constantly increases
Add, bad ratio also rises with it.The production firm of display screen is flowed into client to reduce defective products, generally will do it
100% full inspection.And client is in order to improve production first-pass yield, it is ensured that finished product shipment quality, line assembling is previous on a display screen
As also will do it and accordingly select, it is seen then that the detection of LCD display has become essential thing in procedure for producing.
Currently, the foreign matter of LCD display measures, it is to give certain brightness under determining picture, then pass through human eye
Whether viewing screen surface there is foreign matter, is then compared by compareing scale to foreign matter, by with the mark on control scale
After quasi- object of reference comparison, the shape of foreign matter and the size of foreign matter are determined, finally according to the judgment criteria of client, determine LCD
Whether display screen is qualified.But is existed using the foreign matter of artificial observation picture and be easy in fact so that human eye vision is tired, and again
It in the case where each picture, is compared using the marker of control scale, and compares the marker on scale
Color be usually ater, and do not have permeability, and the shape of marker is usually regular shape, as standard
Round or rectangle, but in actual detection process, the foreign matter on the surface of LCD display is all many times irregular
Shape, so the mode manually compared, working efficiency are lower.
Summary of the invention
In order to solve problem above, a kind of method that the present invention proposes appearance foreign matter for detecting liquid crystal display.Using the present invention
Detection liquid crystal display appearance foreign matter method, be observed under specific picture without human eye, without using to sighting target
The marker of ruler compares judgement, but directlys adopt camera and take pictures, and by way of computer for analysis, directly judges
Whether appearance foreign matter within the scope of client can tolerate out, meanwhile, the determination method of irregular foreign matter proposed by the present invention,
It can make to the shape discrimination of foreign matter more rapidly and accurately.
A kind of new method for the appearance foreign matter detecting liquid crystal display comprising following steps:
S1, LCD liquid crystal display to be detected is under specified brightness, specified picture, after reaching the preset time, leads to
The picture presented in last 1 second is carried out processing of taking pictures by the camera function for crossing camera, and the number of the photo of shooting is 1；
The photo of shooting is saved according to 1: 1 equal proportion, and is transferred in computer by S2；
S3, computer are scanned analysis to the picture of shooting, distinguish to different colors, when distinguishing same figure
When containing >=2 colors in piece, judge that there are foreign matters on LCD liquid crystal display；
S4 passes through what is set in computer to relative to the color except the maximum color of area, the referred to as color of foreign matter
Program judges the shape of foreign matter, and the longest diameter of foreign matter and the shortest diameter of foreign matter are measured respectively, and does at ratio
Reason, if the ratio between the longest diameter of foreign matter and shortest diameter < 3, is divided into circular foreign for foreign matter；If the longest diameter of foreign matter with it is most short
Foreign matter is then divided into linear foreign matter by the ratio between diameter >=3；
S5, linear foreign matter iris out 1~2 regular rectangle according to the shape of foreign matter outside foreign matter, if circle
Out it is 2 regular rectangles, then there must be intersection between two adjacent rectangles, with the lesser outer minister of the gross area
Subject to rectangular, the shape of linear foreign matter is determined；When irising out 1 rectangle outside linear foreign matter, the rectangular length is measured
And width, and record the rectangular center；When irising out 2 rectangles outside linear foreign matter, measures and record respectively
Two rectangular length and widths, and position centered on the vertex that two rectangles are intersected；
S6, according to the shape of foreign matter, irises out a regular circle or ellipse for circular foreign outside foreign matter,
Using the smallest round or ellipse that can encase foreign matter as standard, the major diameter and minor axis or circular straight of the ellipse are measured
Diameter, and record the center position coordinates of the round or ellipse；
S7 needs to carry out the measurement of the distance between adjacent foreign matter for two adjacent foreign matters, will be two adjacent virtual
Rectangle or circle out does tangent line processing, and most chopped line between the two is the distance of two adjacent foreign matters；
Foreign matter is numbered by the first picture according to the sequence on screen from left to right, from top to bottom by S8, then
The distance between the shape and size of all foreign matters are exported, and provide each adjacent foreign matter according to number order；
Above test data is compared with the testing standard that client provides, judges the foreign matter of LCD liquid crystal display by S9
Whether size is qualified.
Further, the picture of foreign bodies detection uses pure color picture, can select black, white, grey, red, green
And blue.
Detailed description of the invention
The measurement determination method schematic diagram that Fig. 1 is irregular foreign matter when being linear foreign matter.
The measurement determination method schematic diagram that Fig. 2 is irregular foreign matter when being circular foreign.
| First rectangular width of linear foreign matter | a1 |
| First rectangular length of linear foreign matter | b1 |
| Second rectangular width of linear foreign matter | a2 |
| Second rectangular length of linear foreign matter | b2 |
| The center of foreign matter | 0 |
| The long electrical path length of circular foreign | R1 |
| The minor axis length of circular foreign | R2 |
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Case 1 is embodied:
A kind of new method for the appearance foreign matter detecting liquid crystal display comprising following steps:
S1, LCD liquid crystal display to be detected is under specified brightness, specified picture, after reaching the preset time, leads to
The picture presented in last 1 second is carried out processing of taking pictures by the camera function for crossing camera, and the number of the photo of shooting is 1；
The photo of shooting is saved according to 1:1 equal proportion, and is transferred in computer by S2；
S3, computer are scanned analysis to the picture of shooting, distinguish to different colors, when distinguishing same figure
When containing >=2 colors in piece, judge that there are foreign matters on LCD liquid crystal display；
S4 passes through what is set in computer to relative to the color except the maximum color of area, the referred to as color of foreign matter
Program judges the shape of foreign matter, and the longest diameter of foreign matter and the shortest diameter of foreign matter are measured respectively, and does at ratio
Reason, if the ratio between the longest diameter of foreign matter and shortest diameter < 3, is divided into circular foreign for foreign matter；If the longest diameter of foreign matter with it is most short
Foreign matter is then divided into linear foreign matter by the ratio between diameter >=3；
S5, linear foreign matter iris out 1~2 regular rectangle according to the shape of foreign matter outside foreign matter, if circle
Out it is 2 regular rectangles, then there must be intersection between two adjacent rectangles, with the lesser outer minister of the gross area
Subject to rectangular, the shape of linear foreign matter is determined；When irising out 1 rectangle outside linear foreign matter, the rectangular length is measured
And width, and record the rectangular center；When irising out 2 rectangles outside linear foreign matter, measures and record respectively
Two rectangular length and widths, and position centered on the vertex that two rectangles are intersected；
S6, according to the shape of foreign matter, irises out a regular circle or ellipse for circular foreign outside foreign matter,
Using the smallest round or ellipse that can encase foreign matter as standard, the major diameter and minor axis or circular straight of the ellipse are measured
Diameter, and record the center position coordinates of the round or ellipse；
S7 needs to carry out the measurement of the distance between adjacent foreign matter for two adjacent foreign matters, will be two adjacent virtual
Rectangle or circle out does tangent line processing, and most chopped line between the two is the distance of two adjacent foreign matters；
Foreign matter is numbered by the first picture according to the sequence on screen from left to right, from top to bottom by S8, then
The distance between the shape and size of all foreign matters are exported, and provide each adjacent foreign matter according to number order；
Above test data is compared with the testing standard that client provides, judges the foreign matter of LCD liquid crystal display by S9
Whether size is qualified.
Further, the picture of foreign bodies detection uses pure color picture, can select black, white, grey, red, green
And blue.
Attached drawing 1 is measurement determination method schematic diagram of irregular foreign matter when being linear foreign matter, in as step S5, different
Two regular rectangles are irised out in the outside of object, and the vertex 0 of two rectangles intersection is center position, and record first is rectangular
The length of shape is b1, and first rectangular width is a1, and second rectangular length is b2, second rectangular width
For a2.
Attached drawing 2 is measurement determination method schematic diagram of irregular foreign matter when being circular foreign, in as step S6, different
A regular ellipse, point centered on oval neutral position 0 are irised out in the outside of object, and the length of oval major diameter is
R1, the length of oval minor axis are R2.
Using the method for the appearance foreign matter of detection liquid crystal display of the invention, without manually being seen under specific picture
It surveys, without using the marker of control scale to compare judgement, but directlys adopt camera and take pictures, and pass through computer
The mode of analysis directly judges appearance foreign matter whether within the scope of client can tolerate, improves work efficiency and quasi-
Exactness.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (3)
1. a kind of new method for the appearance foreign matter for detecting liquid crystal display comprising following steps:
S1, LCD liquid crystal display to be detected after reaching the preset time, pass through phase under specified brightness, specified picture
The picture presented in last 1 second is carried out processing of taking pictures by the camera function of machine, and the number of the photo of shooting is 1；
The photo of shooting is saved according to 1: 1 equal proportion, and is transferred in computer by S2；
S3, computer are scanned analysis to the picture of shooting, distinguish to different colors, when distinguishing in same picture
When containing >=2 colors, judge that there are foreign matters on LCD liquid crystal display；
S4 passes through the program set in computer to relative to the color except the maximum color of area, the referred to as color of foreign matter
The shape of foreign matter is judged, the longest diameter of foreign matter and the shortest diameter of foreign matter are measured respectively, and do ratio proccessing, if
The ratio between the longest diameter and shortest diameter of foreign matter < 3, then be divided into circular foreign for foreign matter；If the ratio between the longest diameter of foreign matter and shortest diameter
>=3, then foreign matter is divided into linear foreign matter；
S5, linear foreign matter iris out 1~2 regular rectangle according to the shape of foreign matter outside foreign matter, come if irising out
It is 2 regular rectangles, then there must be intersection between two adjacent rectangles, with the lesser external rectangle of the gross area
Subject to, determine the shape of linear foreign matter；When irising out 1 rectangle outside linear foreign matter, the rectangular length and width are measured
Degree, and record the rectangular center；When irising out 2 rectangles outside linear foreign matter, two are measured and recorded respectively
Rectangular length and width, and position centered on the vertex that two rectangles are intersected；
S6, according to the shape of foreign matter, irises out a regular circle or ellipse, outside foreign matter for circular foreign with most
The small round or ellipse that can encase foreign matter is standard, measures the major diameter and minor axis or circular diameter of the ellipse, and
Record the center position coordinates of the round or ellipse；
S7 needs to carry out the measurement of the distance between adjacent foreign matter for two adjacent foreign matters, and two adjacent fictionalize is come
Rectangle or circle do tangent line processing, most chopped line between the two is the distance of two adjacent foreign matters；
Foreign matter is numbered by the first picture according to the sequence on screen from left to right, from top to bottom by S8, then according to
The distance between number order exports the shape and size of all foreign matters, and provide each adjacent foreign matter；
Above test data is compared with the testing standard that client provides, judges the size of the foreign matter of LCD liquid crystal display by S9
It is whether qualified.
2. the method for the appearance foreign matter of detection liquid crystal display as described in claim 1, it is characterised in that: specified picture is using pure
Chromatic graph piece.
3. the method for the appearance foreign matter of detection liquid crystal display as described in claim 1, it is characterised in that: specified picture is selected black
One of color, white, grey, red, green or blue picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239853.9A CN109298554A (en) | 2018-03-22 | 2018-03-22 | A kind of new method for the foreign matter detecting liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239853.9A CN109298554A (en) | 2018-03-22 | 2018-03-22 | A kind of new method for the foreign matter detecting liquid crystal display |
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| Publication Number | Publication Date |
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| CN109298554A true CN109298554A (en) | 2019-02-01 |
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| CN201810239853.9A Pending CN109298554A (en) | 2018-03-22 | 2018-03-22 | A kind of new method for the foreign matter detecting liquid crystal display |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6661912B1 (en) * | 1998-08-03 | 2003-12-09 | Hitachi Electronics Engineering Co., Ltd. | Inspecting method and apparatus for repeated micro-miniature patterns |
| KR20050021137A (en) * | 2003-08-26 | 2005-03-07 | 비오이 하이디스 테크놀로지 주식회사 | Back light assembling structure of LCD |
| US20060274147A1 (en) * | 2005-06-07 | 2006-12-07 | Nissan Motor Co., Ltd. | Image display device and method |
| US20080284970A1 (en) * | 2007-05-18 | 2008-11-20 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method thereof |
-
2018
- 2018-03-22 CN CN201810239853.9A patent/CN109298554A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6661912B1 (en) * | 1998-08-03 | 2003-12-09 | Hitachi Electronics Engineering Co., Ltd. | Inspecting method and apparatus for repeated micro-miniature patterns |
| KR20050021137A (en) * | 2003-08-26 | 2005-03-07 | 비오이 하이디스 테크놀로지 주식회사 | Back light assembling structure of LCD |
| US20060274147A1 (en) * | 2005-06-07 | 2006-12-07 | Nissan Motor Co., Ltd. | Image display device and method |
| US20080284970A1 (en) * | 2007-05-18 | 2008-11-20 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 史艳琼等: "液晶显示屏背光源模组表面缺陷自动光学检测系统设计", 《传感技术学报》 * |
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