CN111103711A - Optical detection method for liquid crystal module - Google Patents
Optical detection method for liquid crystal module Download PDFInfo
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- CN111103711A CN111103711A CN201911395386.XA CN201911395386A CN111103711A CN 111103711 A CN111103711 A CN 111103711A CN 201911395386 A CN201911395386 A CN 201911395386A CN 111103711 A CN111103711 A CN 111103711A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 230000003287 optical effect Effects 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 230000005284 excitation Effects 0.000 claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 5
- 230000002950 deficient Effects 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention relates to an optical detection method of a liquid crystal module, which comprises a detection device, wherein the detection method comprises the following steps: firstly, placing a liquid crystal module (3) on a test platform (2) and enabling the liquid crystal module and the test platform to have a common center; secondly, adjusting the angle of the rotating disk 4 to enable the irradiation angle of the excitation light source 5 to pass through the center of the liquid crystal module 3, enabling the light emitted by the excitation light source 5 to form an angle of 30-60 degrees with the liquid crystal module 3, and starting the servo motor 1 to rotate; and thirdly, starting the camera 7, continuously shooting by using the camera 7 at intervals of 0.1 second, sending the shot images to a control system, and analyzing and processing the images by the control system. This device can conveniently detect the roughness on liquid crystal module surface.
Description
Technical Field
The invention relates to the technical field of liquid crystal modules, in particular to an optical detection method of a liquid crystal module.
Background
With the development of technology, Liquid Crystal Displays (LCDs) are widely used in electronic products such as personal computers, mobile phones, televisions, monitors, etc. due to their small size, thin thickness, light weight, and low power consumption.
The flatness detection system is specially used for detecting indexes such as horizontal straightness, coplanarity, clearance, stitch width and the like of stitches of various electronic components such as various IC chips, electronic connectors and the like.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an optical detection method for a liquid crystal module.
The technical scheme of the invention is as follows:
the utility model provides a liquid crystal module optical detection method, includes detection device, detection device includes, servo motor (1), through servo motor (1) drive carries out pivoted test platform (2), place on test platform (2) and wait to detect liquid crystal module (3), still including being used for linear excitation light source (5) to the light source that liquid crystal module (3) are kicked into, and be located reflecting plate (8) of test platform (2) top, the array is provided with triangle-shaped sand grip (9) of different colours on reflecting plate (8), its characterized in that, detection method includes following step:
firstly, placing a liquid crystal module (3) on a test platform (2) and enabling the liquid crystal module and the test platform to have a common center;
secondly, adjusting the angle of the rotating disk (4), enabling the irradiation angle of the excitation light source (5) to pass through the center of the liquid crystal module (3), enabling the light emitted by the excitation light source (5) to form an angle of 30-60 degrees with the liquid crystal module (3), and starting the servo motor (1) to rotate;
and thirdly, starting the camera (7), continuously shooting by using the camera (7) at intervals of 0.1 second, sending the shot images to a control system, and analyzing and processing the images by the control system.
Further, in the above-mentioned case,
acquiring an image, and intercepting the image of a reflected light ray on a triangular convex strip;
converting the image into a gray mode, calculating gray values of all pixel points, comparing the gray values of any two adjacent pixel points in the pixel points, if the gray value ratio of the two adjacent pixel points is 0.9-1, determining the two adjacent pixel points as the same type of pixel points, forming image points by the same type of pixel points, forming two areas after obtaining a plurality of image points, wherein one area is an image of the raised line, and the other area is an image of the reflected light, and counting the number of pixels of the reflected light image;
the method comprises the steps of sleeving a minimum rectangle capable of containing a reflected light image outside the reflected light image, calculating the number of all pixels in the rectangle, counting the proportion of the number of the pixels of the reflected light image to the number of all the pixels in the rectangle, and if the proportion is less than 95%, determining that a bulge exceeding the outside of normal reflected light exists in the reflected light image, wherein the bulge is a point with a defective flatness.
Further, in the above-mentioned case,
in the second step, the light emitted by the excitation light source 5 is parallel to the tip of the triangular convex strip (9).
Further, in the above-mentioned case,
the servo motor (1) is further connected with a reduction gearbox, and the reduction gearbox is connected with the test platform (2).
Further, in the above-mentioned case,
the triangular convex strips (9) are arranged at intervals for coating at least two colors.
Further, in the above-mentioned case,
the excitation light source (5) is a red laser light source.
By the scheme, the invention at least has the following advantages:
this device can conveniently detect the roughness on LCD module surface, when there is great defect on LCD module surface, can conveniently know the result through observing triangle-shaped sand grip, can handle the image through control system when the defect on LCD module surface is little, knows relevant result.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of the structure of the assay of the present invention;
FIG. 2 is a schematic illustration of the present invention detecting normality and abnormality;
in the figure:
1-a servo motor; 2-a test platform; 3-a liquid crystal module; 301-defect; 4-rotating the disc; 5-excitation light source; 6-a guide rail; 7-a camera; 8-a reflector plate; 9-triangular raised lines.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the hardware used in the optical inspection method for liquid crystal module according to a preferred embodiment of the present invention is a servo motor 1 installed on the ground, the servo motor 1 is a high precision motor, a reduction box is generally connected to the driving end of the servo motor 1, a testing platform 2 is connected to the driving end of the reduction box, the testing platform 2 is a square plate with a flat plate shape, the center of the testing platform is connected to the driving end of the reduction box, since the square plate is used for placing the liquid crystal module for testing, a layer of flexible material is further adhered to the surface of the square plate, the flexible material can be a rubber pad with a thickness of 2-3mm, or a hard sponge with a thickness of 3-5mm, during the specific test, the liquid crystal module is placed on the square plate, and the flexible material mainly plays two roles, one is a buffer function to protect the liquid crystal module, and the other is to increase the friction force between the square plate and the liquid crystal module, so that the liquid crystal module moves on the square plate in the test process. Still set up a rotary disk 4, this rotary disk 4 is installed in the oblique top of testing platform 2, rotary disk 4 is the drive end that can connect a motor, can realize the rotation of rotary disk through the motor, an excitation light source 5 has been installed on rotary disk 4, excitation light source 5 is the line light source, excitation light source 5 has been fixed on rotary disk 4, because rotary disk 4 is vertical setting, excitation light source 5 has connected rotary disk 4 perpendicularly again, therefore, through the turned angle who adjusts rotary disk 4, just can change position and the angle that excitation light source 4 shines on liquid crystal module 3.
The testing platform further comprises a reflecting plate 8 positioned above the testing platform 2, the reflecting plate 8 is positioned right above the testing platform 2, and the reflecting plate 8 is arranged in parallel with the testing platform 2.
The lower surface of the reflecting plate 8 is provided with a plurality of triangular convex strips 9 in a linear array, and different colors are arranged among the triangular convex strips 9 at intervals.
The camera is characterized by further comprising a guide rail 6, a camera 7 is arranged on the guide rail 6 in a sliding mode, the camera 7 is provided with a camera shooting opening facing the reflecting plate 8, and the camera 7 is a high-speed video camera.
The invention also comprises a control system which is connected with the servo motor 1, the motor for driving the rotating disk 4 and the camera 7, the control system is not only used for controlling the two motors, but also can receive the image shot by the camera 7 and analyze and process the image so as to detect the position
The above is the hardware device of the present invention, and the specific test method and principle of the present invention are as follows.
First step, place LCD module 3, need guarantee when LCD module 3 is on testing platform 2, center coincidence between them, because LCD module 3 generally is square, testing platform 2 is square, only needs to guarantee that the relative both sides that set up of LCD module 3 equal to the distance at testing platform 2 edges, just can guarantee that both have common center.
When the two are ensured to have a common center, the liquid crystal module 3 and the test platform can be ensured to have the common center all the time in the rotating process.
And secondly, adjusting the angle of the rotating disk 4 to enable the irradiation angle of the excitation light source 5 to pass through the center of the liquid crystal module 3, and enabling the light emitted by the excitation light source 5 to form an angle of 30-60 degrees with the liquid crystal module 3. The servo motor 1 is started to rotate.
The excitation light source 5 emits a linear light source, specifically a red laser linear light source, and since the liquid crystal module 3 is planar and has a reflection effect, the device is used for detecting the surface defect of the liquid crystal module 3 and detecting the surface flatness thereof, an excitation light source 5 is reflected to a reflecting plate 8 after being irradiated on the liquid crystal module 3, after reflection, the light is reflected onto the reflective plate 8, and if the surface of the liquid crystal module 3 is flat, the positions of the triangular convex strips 9 reflected to the reflecting plate 8 are changed from the normal reflecting condition, since the reflected light passes through the different triangular convex strips 9, whether the surface of the liquid crystal module 3 is defective or not can be determined by human eye observation, if the position of the defect is small, the reflected light is always on the same triangular rib 9, and then the camera 7 is started and analyzed by the control system.
And thirdly, starting the camera 7, continuously shooting by using the camera 7 at the shooting interval of 0.1 second, sending the shot images to a control system, and analyzing and processing the images by the control system, wherein the specific analysis process is as follows.
Any one image is processed as follows:
acquiring an image, and intercepting the image of a reflected light ray on a triangular convex strip;
converting the image into a gray mode, calculating gray values of all pixel points, comparing the gray values of any two adjacent pixel points in the pixel points, if the gray value ratio of the two adjacent pixel points is 0.9-1, determining the two adjacent pixel points as the same type of pixel points, forming image points by the same type of pixel points, forming two areas after obtaining a plurality of image points, wherein one area is an image of the raised line, and the other area is an image of the reflected light, and counting the number of pixels of the reflected light image.
The method comprises the steps of sleeving a minimum rectangle capable of containing a reflected light image outside the reflected light image, calculating the number of all pixels in the rectangle, counting the proportion of the number of the pixels of the reflected light image to the number of all the pixels in the rectangle, and if the proportion is less than 95%, determining that a bulge exceeding the outside of normal reflected light exists in the reflected light image, wherein the bulge is a point with a defective flatness.
The device has the following advantages:
this device can conveniently detect the roughness on LCD module surface, when there is great defect on LCD module surface, can conveniently know the result through observing triangle-shaped sand grip, can handle the image through control system when the defect on LCD module surface is little, knows relevant result.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a liquid crystal module optical detection method, includes detection device, detection device includes, servo motor (1), through servo motor (1) drive carries out pivoted test platform (2), place on test platform (2) and wait to detect liquid crystal module (3), still including being used for linear excitation light source (5) to the light source that liquid crystal module (3) are kicked into, and be located reflecting plate (8) of test platform (2) top, the array is provided with triangle-shaped sand grip (9) of different colours on reflecting plate (8), its characterized in that, detection method includes following step:
firstly, placing a liquid crystal module (3) on a test platform (2) and enabling the liquid crystal module and the test platform to have a common center;
secondly, adjusting the angle of the rotating disk (4), enabling the irradiation angle of the excitation light source (5) to pass through the center of the liquid crystal module (3), enabling the light emitted by the excitation light source (5) to form an angle of 30-60 degrees with the liquid crystal module (3), and starting the servo motor (1) to rotate;
and thirdly, starting the camera (7), continuously shooting by using the camera (7) at intervals of 0.1 second, sending the shot images to a control system, and analyzing and processing the images by the control system.
2. The optical detection method for the liquid crystal module according to claim 1, wherein the third step specifically comprises:
acquiring an image, and intercepting the image of a reflected light ray on a triangular convex strip;
converting the image into a gray mode, calculating gray values of all pixel points, comparing the gray values of any two adjacent pixel points in the pixel points, if the gray value ratio of the two adjacent pixel points is 0.9-1, determining the two adjacent pixel points as the same type of pixel points, forming image points by the same type of pixel points, forming two areas after obtaining a plurality of image points, wherein one area is an image of the raised line, and the other area is an image of the reflected light, and counting the number of pixels of the reflected light image;
the method comprises the steps of sleeving a minimum rectangle capable of containing a reflected light image outside the reflected light image, calculating the number of all pixels in the rectangle, counting the proportion of the number of the pixels of the reflected light image to the number of all the pixels in the rectangle, and if the proportion is less than 95%, determining that a bulge exceeding the outside of normal reflected light exists in the reflected light image, wherein the bulge is a point with a defective flatness.
3. The optical detection method of the liquid crystal module according to claim 1, wherein: in the second step, the light emitted by the excitation light source 5 is parallel to the tip of the triangular convex strip (9).
4. The optical detection method of the liquid crystal module according to claim 1, wherein: the servo motor (1) is further connected with a reduction gearbox, and the reduction gearbox is connected with the test platform (2).
5. The optical detection method of the liquid crystal module according to claim 1, wherein: the triangular convex strips (9) are arranged at intervals for coating at least two colors.
6. The optical detection method of the liquid crystal module according to claim 1, wherein: the excitation light source (5) is a red laser light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395386.XA CN111103711A (en) | 2019-12-30 | 2019-12-30 | Optical detection method for liquid crystal module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911395386.XA CN111103711A (en) | 2019-12-30 | 2019-12-30 | Optical detection method for liquid crystal module |
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| CN111103711A true CN111103711A (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046478A (en) * | 2022-08-10 | 2022-09-13 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920385A (en) * | 1984-02-14 | 1990-04-24 | Diffracto Ltd. | Panel surface flaw inspection |
| JPH1026589A (en) * | 1996-07-09 | 1998-01-27 | Nikon Corp | Inspection apparatus for foreign body |
| EP1058099A2 (en) * | 1999-05-19 | 2000-12-06 | UMM Electronics, Inc. | Fluid detector |
| JP2004109106A (en) * | 2002-07-22 | 2004-04-08 | Fujitsu Ltd | Method and apparatus for inspecting surface defect |
| CN101427127A (en) * | 2006-04-26 | 2009-05-06 | 夏普株式会社 | Color filter inspecting method, color filter manufacturing method, and color filter inspecting device |
| KR20190027296A (en) * | 2017-09-06 | 2019-03-14 | 주식회사 필옵틱스 | Detection System for Deformation of Flexible Substrate |
-
2019
- 2019-12-30 CN CN201911395386.XA patent/CN111103711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4920385A (en) * | 1984-02-14 | 1990-04-24 | Diffracto Ltd. | Panel surface flaw inspection |
| JPH1026589A (en) * | 1996-07-09 | 1998-01-27 | Nikon Corp | Inspection apparatus for foreign body |
| EP1058099A2 (en) * | 1999-05-19 | 2000-12-06 | UMM Electronics, Inc. | Fluid detector |
| JP2004109106A (en) * | 2002-07-22 | 2004-04-08 | Fujitsu Ltd | Method and apparatus for inspecting surface defect |
| CN101427127A (en) * | 2006-04-26 | 2009-05-06 | 夏普株式会社 | Color filter inspecting method, color filter manufacturing method, and color filter inspecting device |
| KR20190027296A (en) * | 2017-09-06 | 2019-03-14 | 주식회사 필옵틱스 | Detection System for Deformation of Flexible Substrate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046478A (en) * | 2022-08-10 | 2022-09-13 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
| CN115046478B (en) * | 2022-08-10 | 2022-12-02 | 深之蓝海洋科技股份有限公司 | Underwater relative pose measuring method and device |
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