CN108681114A - A kind of detection device and method of small size LCD character display defects - Google Patents
A kind of detection device and method of small size LCD character display defects Download PDFInfo
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- CN108681114A CN108681114A CN201810470566.9A CN201810470566A CN108681114A CN 108681114 A CN108681114 A CN 108681114A CN 201810470566 A CN201810470566 A CN 201810470566A CN 108681114 A CN108681114 A CN 108681114A
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- image
- lcd
- sample
- template
- lcd panel
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Classifications
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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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/20—Image enhancement or restoration by the use of local operators
- G06T5/30—Erosion or dilatation, e.g. thinning
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/001—Industrial image inspection using an image reference approach
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/12—Edge-based segmentation
Abstract
The present invention proposes that a kind of detection device and method of small size LCD character display defects, the detection device include image collecting device, LCD panel fixture and computing device；The LCD panel fixture includes the assembly made of the orthogonal polarizing film stacking of locating clip and two panels light transmission direction；Described image harvester is located at assembly side and is connected with computing device；When being detected, LCD panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, and the computing device carries out template image acquisition or sample to be tested Image Acquisition through image collecting device to LCD panel；Operation is compared to template image and sample to be tested image to judge whether LCD panel is defect panel with computing device in the detection method；The present invention can greatly reduce the labor intensity of worker, improve product detection efficiency and accuracy.
Description
Technical field
The present invention relates to LCD panel technical field, especially a kind of detection device of small size LCD character display defects and
Method.
Background technology
In LCD production processes, to realize that LCD screen shows that character must then print corresponding character on TFT glass
The ITO of shape（Indium Tin Oxide, transparent conductive metal）Coating controls the movement of liquid crystal to realize liquid crystal display
Required character content.But since printing ITO coating process is complicated, there is certain error rate, so must before LCD panel manufacture
It must be applied to all kinds of miniature, miniaturized electronics display screens due to many by manually carrying out one-hundred-percent inspection to final product
LCD panel area it is small, its display character it is also corresponding minimum, pure human eye go identification character displayed whether missing, biasing
The defects of be undoubtedly very big test to worker's eyesight and endurance, since eyesight labor intensity is big, cause worker be lost in seriously with
And high false drop rate, this becomes the serious bottleneck for restricting LCD panel vendor and improving yield, and then there is an urgent need to a kind of energy
Enough automatic detection devices and method for quickly carrying out small size LCD character display defects.
Invention content
The present invention proposes a kind of detection device and method of small size LCD character display defects, can greatly reduce worker's
Labor intensity improves product detection efficiency and accuracy.
The present invention uses following technical scheme.
A kind of detection device of small size LCD character display defects, the detection device includes image collecting device, LCD
Panel holder and computing device；The LCD panel fixture includes by the orthogonal polarizing film stacking of locating clip and two panels light transmission direction
Made of assembly；Described image harvester is located at assembly side and is connected with computing device；When being detected, LCD
Panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, and the computing device carries out LCD panel through image collecting device
Template image acquires or sample to be tested Image Acquisition.
Described image harvester is the image collecting device based on CCD.
When LCD panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, transparent microscope carrier is lined with below LCD panel；
Two polarizing films are divided into above and below transparent microscope carrier.
The detection method use detection device described above, the detection method successively include template image acquisition,
Sample to be tested Image Acquisition and image comparison processing.
The template image acquisition includes the following steps successively；
A1, the LCD panel of character display performance qualification is selected as template LCD；
A2, template LCD is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carries out Image Acquisition；
A3, computing device after the image collected progress binary conversion treatment as template image to storing.
The sample to be tested Image Acquisition includes the following steps successively；
B1, LCD to be detected is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carry out Image Acquisition；
B2, computing device after the image collected progress binary conversion treatment as sample to be tested image to storing.
It includes following methods that described image, which compares processing,；
C1, sample image to be detected is laminated at template image, and carries out computing cross-correlation and judges sample image and mould to be detected
Whether plate image is aligned, and illustrates image alignment if the value of computing cross-correlation is more than setting reasonable threshold value；
C2, when step C1 judges image alignment, image subtraction operation acquisition is carried out to template image, sample to be tested image and is waited for
Survey the defects of sample image position；Image erosion is carried out to remove insignificant subtle edge, when by scheming to rejected region
When being more than threshold value as the rejected region area of corrosion treatment, then judge LCD panel to be detected for defect panel；
C3, when step C1 judges image misalignment, sample image to be detected and template image are carried out to accumulate related gray scale
With search, and according to search result, mobile sample image to be detected is until sample image to be detected is aligned with template image, then
It is transferred to step C2 processing.
In the present invention, since the present invention carries out clamping using the orthogonal polarizing film in two panels light transmission direction to LCD panel,
Environmental disturbances light can greatly be cut down so that detection process is more accurate.
It, can since the present invention detects the character display defect of small size LCD with image comparison technology in the present invention
To avoid the fatigue and error of Manual Visual Inspection, be conducive to the detection quality for promoting detection process.
Description of the drawings
The present invention is described in more detail with reference to the accompanying drawings and detailed description：
Attached drawing 1 is the schematic diagram of the detection device of the present invention；
Attached drawing 2 is the flow diagram of the detection method of the present invention；
In figure：1- image collecting devices；Polarizing film above the transparent microscope carriers of 2-；3- locating clips；The transparent microscope carriers of 4-；The transparent microscope carriers of 5-
The polarizing film of lower section；6-LCD panels；7- computing devices.
Specific implementation mode
As shown in Figs. 1-2, a kind of detection device of small size LCD character display defects, the detection device includes image
Harvester 1, LCD panel fixture and computing device；The LCD panel fixture include by locating clip 3 and two panels light transmission direction just
The assembly that the polarizing film 2 and 5 of friendship is laminated；Described image harvester 1 be located at assembly side and with 7 phase of computing device
Even；When being detected, LCD panel 6 is sandwiched between the orthogonal polarizing film 2 and 5 in two panels light transmission direction, and the computing device 7 passes through
Image collecting device 1 carries out template image acquisition or sample to be tested Image Acquisition to LCD panel 6.
Described image harvester is the image collecting device based on CCD.
When LCD panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, transparent microscope carrier 4 is lined with below LCD panel；
Two polarizing films 2 and 5 are divided into above and below transparent microscope carrier 4.
The detection method use detection device described above, the detection method successively include template image acquisition,
Sample to be tested Image Acquisition and image comparison processing.
The template image acquisition includes the following steps successively；
A1, the LCD panel of character display performance qualification is selected as template LCD；
A2, template LCD is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carries out Image Acquisition；
A3, computing device after the image collected progress binary conversion treatment as template image to storing.
The sample to be tested Image Acquisition includes the following steps successively；
B1, LCD to be detected is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carry out Image Acquisition；
B2, computing device after the image collected progress binary conversion treatment as sample to be tested image to storing.
It includes following methods that described image, which compares processing,；
C1, sample image to be detected is laminated at template image, and carries out computing cross-correlation and judges sample image and mould to be detected
Whether plate image is aligned, and illustrates image alignment if the value of computing cross-correlation is more than setting reasonable threshold value；
C2, when step C1 judges image alignment, image subtraction operation acquisition is carried out to template image, sample to be tested image and is waited for
Survey the defects of sample image position；Image erosion is carried out to remove insignificant subtle edge, when by scheming to rejected region
When being more than threshold value as the rejected region area of corrosion treatment, then judge LCD panel to be detected for defect panel；
C3, when step C1 judges image misalignment, sample image to be detected and template image are carried out to accumulate related gray scale
With search, and according to search result, mobile sample image to be detected is until sample image to be detected is aligned with template image, then
It is transferred to step C2 processing.
Claims (7)
1. a kind of detection device of small size LCD character display defects, it is characterised in that：The detection device includes Image Acquisition
Device, LCD panel fixture and computing device；The LCD panel fixture includes by orthogonal inclined of locating clip and two panels light transmission direction
Assembly made of the piece that shakes stacking；Described image harvester is located at assembly side and is connected with computing device；When being examined
When survey, LCD panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, and the computing device is through image collecting device to LCD
Panel carries out template image acquisition or sample to be tested Image Acquisition.
2. a kind of detection device of small size LCD character display defects according to claim 1, it is characterised in that：It is described
Image collector is set to the image collecting device based on CCD.
3. a kind of detection device of small size LCD character display defects according to claim 1, it is characterised in that：Work as LCD
When panel is sandwiched between the orthogonal polarizing film in two panels light transmission direction, transparent microscope carrier is lined with below LCD panel；Two polarizing films set up separately
Above and below transparent microscope carrier.
4. a kind of detection method of small size LCD character display defects, it is characterised in that：The detection method is used as right is wanted
It includes that template image acquisition, sample to be tested Image Acquisition and image compare successively to ask the detection device described in 1, the detection method
Processing.
5. a kind of detection method of small size LCD character display defects according to claim 4, it is characterised in that：It is described
Template image acquisition includes the following steps successively；
A1, the LCD panel of character display performance qualification is selected as template LCD；
A2, template LCD is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carries out Image Acquisition；
A3, computing device after the image collected progress binary conversion treatment as template image to storing.
6. a kind of detection method of small size LCD character display defects according to claim 5, it is characterised in that：It is described
Sample to be tested Image Acquisition includes the following steps successively；
B1, LCD to be detected is placed between two polarizing films and it is made to show character, then image collecting device is to showing character
Template LCD carry out Image Acquisition；
B2, computing device after the image collected progress binary conversion treatment as sample to be tested image to storing.
7. a kind of detection method of small size LCD character display defects according to claim 6, it is characterised in that：It is described
It includes following methods that image, which compares processing,；
C1, sample image to be detected is laminated at template image, and carries out computing cross-correlation and judges sample image and mould to be detected
Whether plate image is aligned, and illustrates image alignment if the value of computing cross-correlation is more than setting reasonable threshold value；
C2, when step C1 judges image alignment, image subtraction operation acquisition is carried out to template image, sample to be tested image and is waited for
Survey the defects of sample image position；Image erosion is carried out to remove insignificant subtle edge, when by scheming to rejected region
When being more than threshold value as the rejected region area of corrosion treatment, then judge LCD panel to be detected for defect panel；
C3, when step C1 judges image misalignment, sample image to be detected and template image are carried out to accumulate related gray scale
With search, and according to search result, mobile sample image to be detected is until sample image to be detected is aligned with template image, then
It is transferred to step C2 processing.
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| CN201810470566.9A CN108681114A (en) | 2018-05-17 | 2018-05-17 | A kind of detection device and method of small size LCD character display defects |
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| CN201810470566.9A CN108681114A (en) | 2018-05-17 | 2018-05-17 | A kind of detection device and method of small size LCD character display defects |
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Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179251A (en) * | 1994-12-20 | 1996-07-12 | Sharp Corp | Device and method for manufacture display device |
| JP2006084496A (en) * | 2004-09-14 | 2006-03-30 | V Technology Co Ltd | Lighting inspection apparatus |
| CN1982954A (en) * | 2005-12-17 | 2007-06-20 | 比亚迪股份有限公司 | Method for inspecting planar display device |
| CN101075024A (en) * | 2006-05-17 | 2007-11-21 | 宏濑科技股份有限公司 | Environmental-protecting lamphouse for lighting tester |
| US20080069454A1 (en) * | 2006-05-26 | 2008-03-20 | Pop Mihai G M | Method for positive identification of inner surface and outer surface of sample flakes |
| CN101520558A (en) * | 2008-02-29 | 2009-09-02 | 乐金显示有限公司 | Inspection apparatus for liquid crystal display device and inspection method using the same |
| CN101770099A (en) * | 2010-02-24 | 2010-07-07 | 福州华映视讯有限公司 | Scintillation detection method for liquid crystal panel |
| CN202166800U (en) * | 2011-08-04 | 2012-03-14 | 瀚斯宝丽显示科技（南京）有限公司 | Upper polarizing plate installation structure for lighting machine |
| CN102385497A (en) * | 2010-08-30 | 2012-03-21 | 联想(北京)有限公司 | Image data processing method and system |
| CN102654659A (en) * | 2012-04-06 | 2012-09-05 | 京东方科技集团股份有限公司 | Device and method for detecting liquid crystal substrate |
| CN102682307A (en) * | 2012-05-03 | 2012-09-19 | 苏州多捷电子科技有限公司 | Modifiable answer sheet system and implementation method thereof based on image processing |
| CN102749034A (en) * | 2012-06-27 | 2012-10-24 | 浙江大学 | Railway switch gap offset detection method based on image processing |
| CN102855495A (en) * | 2012-08-22 | 2013-01-02 | 苏州多捷电子科技有限公司 | Method for implementing electronic edition standard answer, and application system thereof |
| CN103544475A (en) * | 2013-09-23 | 2014-01-29 | 方正国际软件有限公司 | Method and system for recognizing layout types |
| CN103645573A (en) * | 2013-11-22 | 2014-03-19 | 大连日佳电子有限公司 | Liquid crystal display (LCD) detection method and system based on machine vision |
| CN103959047A (en) * | 2012-09-14 | 2014-07-30 | 株式会社理光 | Image inspection apparatus, image inspection system and image inspection method |
| CN104614384A (en) * | 2015-02-06 | 2015-05-13 | 北京印刷学院 | Quality detecting method of printing product character |
| CN104765173A (en) * | 2015-04-29 | 2015-07-08 | 京东方科技集团股份有限公司 | Detection device and detection method thereof |
| CN205003401U (en) * | 2015-03-30 | 2016-01-27 | 法视特（上海）图像科技有限公司 | Smaller screen checkout system of lighting a lamp |
| CN106875419A (en) * | 2016-12-29 | 2017-06-20 | 北京理工雷科电子信息技术有限公司 | Small and weak tracking of maneuvering target based on NCC matching frame differences loses weight detecting method |
| CN107346068A (en) * | 2016-05-06 | 2017-11-14 | 上海纪显电子科技有限公司 | Detecting system and detection method |
-
2018
- 2018-05-17 CN CN201810470566.9A patent/CN108681114A/en active Pending
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179251A (en) * | 1994-12-20 | 1996-07-12 | Sharp Corp | Device and method for manufacture display device |
| JP2006084496A (en) * | 2004-09-14 | 2006-03-30 | V Technology Co Ltd | Lighting inspection apparatus |
| CN1982954A (en) * | 2005-12-17 | 2007-06-20 | 比亚迪股份有限公司 | Method for inspecting planar display device |
| CN101075024A (en) * | 2006-05-17 | 2007-11-21 | 宏濑科技股份有限公司 | Environmental-protecting lamphouse for lighting tester |
| US20080069454A1 (en) * | 2006-05-26 | 2008-03-20 | Pop Mihai G M | Method for positive identification of inner surface and outer surface of sample flakes |
| CN101520558A (en) * | 2008-02-29 | 2009-09-02 | 乐金显示有限公司 | Inspection apparatus for liquid crystal display device and inspection method using the same |
| CN101770099A (en) * | 2010-02-24 | 2010-07-07 | 福州华映视讯有限公司 | Scintillation detection method for liquid crystal panel |
| CN102385497A (en) * | 2010-08-30 | 2012-03-21 | 联想(北京)有限公司 | Image data processing method and system |
| CN202166800U (en) * | 2011-08-04 | 2012-03-14 | 瀚斯宝丽显示科技（南京）有限公司 | Upper polarizing plate installation structure for lighting machine |
| CN102654659A (en) * | 2012-04-06 | 2012-09-05 | 京东方科技集团股份有限公司 | Device and method for detecting liquid crystal substrate |
| CN102682307A (en) * | 2012-05-03 | 2012-09-19 | 苏州多捷电子科技有限公司 | Modifiable answer sheet system and implementation method thereof based on image processing |
| CN102749034A (en) * | 2012-06-27 | 2012-10-24 | 浙江大学 | Railway switch gap offset detection method based on image processing |
| CN102855495A (en) * | 2012-08-22 | 2013-01-02 | 苏州多捷电子科技有限公司 | Method for implementing electronic edition standard answer, and application system thereof |
| CN103959047A (en) * | 2012-09-14 | 2014-07-30 | 株式会社理光 | Image inspection apparatus, image inspection system and image inspection method |
| CN103544475A (en) * | 2013-09-23 | 2014-01-29 | 方正国际软件有限公司 | Method and system for recognizing layout types |
| CN103645573A (en) * | 2013-11-22 | 2014-03-19 | 大连日佳电子有限公司 | Liquid crystal display (LCD) detection method and system based on machine vision |
| CN104614384A (en) * | 2015-02-06 | 2015-05-13 | 北京印刷学院 | Quality detecting method of printing product character |
| CN205003401U (en) * | 2015-03-30 | 2016-01-27 | 法视特（上海）图像科技有限公司 | Smaller screen checkout system of lighting a lamp |
| CN104765173A (en) * | 2015-04-29 | 2015-07-08 | 京东方科技集团股份有限公司 | Detection device and detection method thereof |
| CN107346068A (en) * | 2016-05-06 | 2017-11-14 | 上海纪显电子科技有限公司 | Detecting system and detection method |
| CN106875419A (en) * | 2016-12-29 | 2017-06-20 | 北京理工雷科电子信息技术有限公司 | Small and weak tracking of maneuvering target based on NCC matching frame differences loses weight detecting method |
Non-Patent Citations (1)
| Title |
|---|
| 徐炜东，郭斌，张永超，徐志鹏: "液晶屏字符显示缺陷检测算法研究", 《中国计量学院学报》 * |
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Application publication date: 20181019 |