CN101452122B - LCD displaying effect detection device and method - Google Patents
LCD displaying effect detection device and method Download PDFInfo
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- CN101452122B CN101452122B CN2007101785540A CN200710178554A CN101452122B CN 101452122 B CN101452122 B CN 101452122B CN 2007101785540 A CN2007101785540 A CN 2007101785540A CN 200710178554 A CN200710178554 A CN 200710178554A CN 101452122 B CN101452122 B CN 101452122B
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Abstract
The present invention relates to an LCD display effect detector which comprises the following components: a collecting module which is used for collecting the light signal of picture to be detected and converting the light signal to electrical signal; a detecting module which is connected with the collecting module and is used for analyzing and processing the brightness and color intensity of each pixel of picture to be detected, and outputting pixel abnormity information to the pixel points which have brightness and/or color intensity exceeding the preset threshold range. The invention also relates to a method for detecting the LCD display effect. The LCD display effect detector has the advantages of high detection automatization degree to the picture quality, easy realization, high detection precision, high efficiency, reduced labor intensity and guaranteed product quality.
Description
Technical field
The present invention relates to a kind of pick-up unit, especially a kind of LCD display effect pick-up unit and method.
Background technology
At LCD (Liquid Crystal Display, abbreviation LCD) in the manufacture process, because factor such as production equipment instability, can influence the display quality of portioned product, bad as showing bright spot, dim spot, bright line, concealed wire and planar brightness disproportionation etc.
For avoiding producing bad product, be provided with detection operation layer by layer in the actual production.Such as, becoming box (cell) operation that the display effect of semi-manufacture panel is tested, the display effect of finished product panel is tested in module (module) operation.
At present the detection of display display effect is all adopted the mode of manual detection.Under dark room conditions, to low grey menu such as display input black to be checked, the testing staff observes picture from different perspectives, and naked eyes judge whether to exist quality bad, and according to standard product are evaluated corresponding rank.
Because LCD manufacturing industry production capacity height, dispatching from the factory all of every panel will be through at least twice image quality inspection, so detection limit is very big, and the mode of manual detection need be employed the needs that bigger manpower could satisfy production capacity, and labour intensity is bigger.And the mode of manual detection mainly carries out subjective judgement by testing staff's vision, and accuracy of detection is limited, and efficient is low, and standard can't be unified, and easily produces false retrieval, omission.
Summary of the invention
The object of the present invention is to provide a kind of LCD display effect pick-up unit and method, defective such as effectively solve that existing manual detection LCD display effect workload is big, labour intensity is big, accuracy of detection is limited and efficient is low.
To achieve these goals, the invention provides a kind of LCD display effect pick-up unit, comprising:
Acquisition module is used for gathering from display screen the light signal of picture to be measured, this light signal is converted into electric signal and sends;
Detection module, be connected with described acquisition module, be used for the brightness and the colourity of described picture pixel to be measured being analyzed and being handled according to described electric signal, the brightness and the chrominance information that contrast each pixel obtain luminance deviation and chromaticity distortion, for exceeding luminance deviation and/or the chromaticity distortion output pixel abnormal information that preestablishes threshold range.
Also comprise: signal output module, described signal output module is connected with detection module, is used for sending picture signal to be measured to described display screen.
To achieve these goals, the present invention also provides a kind of LCD display effect detection method, comprising:
Also comprise before the described step 100: export picture signal to be measured to described display screen.
Described step 200 is specially:
Extract the brightness and the chrominance information of pixel according to described electric signal;
The brightness and the chrominance information that contrast each pixel obtain luminance deviation and chromaticity distortion;
To exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel abnormal information; To not exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel normal information.
Also comprise after the described step 200:
Historical data in step 300, the luminance deviation that will exceed threshold range and/or chromaticity distortion and the database contrasts, if record is arranged, then carries out diagnostic process according to corresponding diagnostic message in the described database; If no record, then execution in step 310;
Step 310, the abnormal pixel that luminance deviation and/or chromaticity distortion are exceeded threshold range are analyzed, and definite diagnostic message, execution in step 330;
Step 320, the abnormal data and the diagnostic message of described abnormal pixel correspondence stored in the database;
Step 330, end.
Big at existing manual detection LCD picture quality workload, labour intensity is big, defective such as the limited and efficient of accuracy of detection is low, the invention provides a kind of LCD display effect pick-up unit and method, by gathering the light signal of picture to be measured, this light signal is converted into electric signal, and extract the brightness and the chrominance information of pixel according to this electric signal, the brightness of each pixel and chrominance information handled obtain chromaticity distortion and luminance deviation, whether exceed the setting threshold scope according to chromaticity distortion and/or luminance deviation and judge whether pixel is normal, thereby reach the purpose that detects picture quality.The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is a LCD display effect pick-up unit structural representation of the present invention;
Fig. 2 is a LCD display effect detection method process flow diagram of the present invention;
Fig. 3 is a LCD display effect detection method embodiment process flow diagram of the present invention.
Embodiment
Fig. 1 is a LCD display effect pick-up unit structural representation of the present invention, as shown in Figure 1, LCD display effect pick-up unit of the present invention comprises charge-coupled image sensor 1 as acquisition module (Charge CoupledDevice is called for short CCD), detection module 2 and as the signal source 3 of signal output module.Charge-coupled image sensor 1 places the top of LCD display display screen 4, is used for gathering the light signal of display screen 4 pictures to be measured, and this light signal is converted into electric signal; Detection module 2 is connected with charge-coupled image sensor 1, receive electric signal, extract the brightness and the chrominance information of pixel then according to electric signal, and the brightness of pixel and chrominance information handled obtain luminance deviation and chromaticity distortion, whether exceed the judgement of setting threshold scope display quality, the i.e. quality of display effect according to luminance deviation and chromaticity distortion.Signal source 3 connection detection module 2 and display screen 4, the opening and closing of control display screen 4, and picture signal to be measured exported to display screen 4.
Big at existing manual detection LCD picture quality workload, labour intensity is big, defective such as the limited and efficient of accuracy of detection is low, the invention provides a kind of LCD display effect pick-up unit, by acquisition module is set, the light signal of the picture to be measured that collects is converted into electric signal and sends to detection module, detection module extract according to this electric signal picture to be measured pixel brightness and chrominance information and handle and obtain luminance deviation and chromaticity distortion, whether exceed the setting threshold scope according to luminance deviation and/or chromaticity distortion and judge whether pixel is normal, thereby reach the purpose that detects picture quality.The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
Before implementing the present invention, at first set up database.Store the monochrome information and the chrominance information of pixel under each picture to be measured of normal condition in the database, and normal brightness deviation between the pixel and standard colorimetric deviation, and established standards luminance deviation and the standard colorimetric deviation variation range of allowing, i.e. setting threshold scope.In addition, also according to historical experience, unusual luminance deviation and unusual chromaticity distortion in database under the rule of thumb known various abnormal conditions of storage between the unusual monochrome information of pixel and unusual chrominance information and abnormal pixel and the abnormal pixel, between abnormal pixel and the normal pixel, and with every kind of diagnostic message that abnormal conditions are corresponding.
In the present embodiment, signal source 3 control display screen 4 are opened, and picture to be measured is exported to display screen 4, and display screen 4 shows picture to be measured.Charge-coupled image sensor 1 begins to gather the light signal of picture to be measured, this light signal is converted to electric signal, and this electric signal exported to detection module 2, detection module 2 receives electric signal, extracts the brightness and the chrominance information of each pixel of display screen 4 according to this electric signal.Detection module 2 is selected a certain pixel, contrast the monochrome information and the chrominance information of this pixel and each pixel around it, obtain luminance deviation and chromaticity distortion, judge then whether luminance deviation and chromaticity distortion exceed threshold range, if do not exceed threshold range, then the output pixel normal information detects next pixel; When whole pixels all finish after testing, detect next picture to be measured according to actual needs, perhaps detect next LCD panel.If exceed threshold range, output pixel abnormal information then, and unusual luminance deviation in luminance deviation and chromaticity distortion and the database and unusual chromaticity distortion contrast, as if record is arranged, then according in the database accordingly diagnostic message abnormal pixel is carried out diagnostic process; If no record, then abnormal pixel is analyzed, and definite diagnostic message, the abnormal data and the diagnostic message of this abnormal pixel correspondence stored in the database.Each pixel of 2 pairs of pictures to be measured of detection module compares successively, detects, judges.
In technique scheme, the way of contrast of monochrome information and chrominance information can contrast for each pixel around each single pixel and its between the pixel, also can be to compare successively between the pixel of horizontal ordinate or ordinate unanimity, perhaps all pixels in certain zone compare etc., or the combination of these way of contrast.
The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
Fig. 2 is a LCD display effect detection method process flow diagram of the present invention, and concrete steps are:
The present invention is converted into electric signal by the light signal of the picture to be measured that will collect, extract according to this electric signal picture to be measured pixel brightness and chrominance information and handle and obtain luminance deviation and chromaticity distortion, whether exceed the setting threshold scope according to luminance deviation and/or chromaticity distortion and judge whether pixel is normal, thereby reach the purpose that detects picture quality.The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
In technique scheme, also comprise after the step 200:
Step 300, the luminance deviation of abnormal pixel and/or the historical data in chromaticity distortion and the database are contrasted,, then carry out diagnostic process according to corresponding diagnostic message in the database if record is arranged; If no record, then execution in step 310;
Step 310, abnormal pixel is analyzed, and definite diagnostic message;
Step 320, the abnormal data and the diagnostic message of abnormal pixel correspondence stored in the database.
Before implementing the present invention, at first set up database.Store the monochrome information and the chrominance information of pixel under each picture to be checked of normal condition in the database, and normal brightness deviation between the pixel and standard colorimetric deviation, and established standards luminance deviation and the standard colorimetric deviation variation range of allowing, i.e. setting threshold scope.In addition, also according to historical experience, unusual luminance deviation and unusual chromaticity distortion in database under the rule of thumb known various abnormal conditions of storage between the unusual monochrome information of pixel and unusual chrominance information and abnormal pixel and the abnormal pixel, between abnormal pixel and the normal pixel, and with every kind of diagnostic message that abnormal conditions are corresponding.
In the present embodiment, export picture signal to be measured, show picture to be measured, gather the light signal of picture to be measured, this light signal is converted to electric signal, and, can obtain the brightness and the chrominance information of each pixel according to this electric signal this electric signal output to display screen.Select a certain pixel, contrast the monochrome information and the chrominance information of this pixel and each pixel around it, obtain luminance deviation and chromaticity distortion.Judge then whether luminance deviation and chromaticity distortion exceed threshold range, if do not exceed threshold range, then the output pixel normal information detects next pixel; When whole pixels all finish after testing, detect next picture to be measured according to actual needs, perhaps detect next LCD panel.If exceed threshold range, output pixel abnormal information then, unusual luminance deviation in luminance deviation and chromaticity distortion and the database and unusual chromaticity distortion are contrasted,, then abnormal pixel is carried out diagnostic process according to corresponding diagnostic message in the database if record is arranged; If no record, then abnormal pixel is analyzed, and definite diagnostic message, the abnormal data and the diagnostic message of this abnormal pixel correspondence stored in the database.Each pixel to picture to be measured compares successively, detects.
In technique scheme, the way of contrast of monochrome information and chrominance information can contrast for each pixel around each single pixel and its between the pixel, also can be to compare successively between the pixel of horizontal ordinate or ordinate unanimity, perhaps all pixels in certain zone compare etc., or the combination of these way of contrast.
The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
Fig. 3 is a LCD display effect detection method embodiment process flow diagram of the present invention, as shown in Figure 3, specifically comprises:
The light signal of step 530, collection picture to be measured is converted into electric signal and transmission with this light signal;
In step 590, the judgment data storehouse whether respective record being arranged, is execution in step 591 then, otherwise execution in step 600;
Finished product LCD panel after present embodiment finishes with module technology is an example.Before implementing the present invention, at first set up database.The monochrome information and the chrominance information of pixel under the storage normal condition in the database, and normal brightness difference between the pixel and standard colorimetric difference, and established standards luminance difference and the standard colorimetric difference variation range of allowing, i.e. setting threshold scope.In addition, also according to historical experience, unusual luminance difference and unusual colourity difference in database under the rule of thumb known various abnormal conditions of storage between the unusual monochrome information of pixel and unusual chrominance information and abnormal pixel and the abnormal pixel, between abnormal pixel and the normal pixel, and with every kind of diagnostic message that abnormal conditions are corresponding.
In the present embodiment, export picture to be measured, show picture to be measured, begin to gather the light signal of picture to be measured, this light signal is converted to electric signal, can obtain the brightness and the chrominance information of each pixel of LCD display display screen according to this electric signal to display screen.Select a certain pixel, contrast the monochrome information and the chrominance information of this pixel and each pixel around it, obtain luminance deviation and chromaticity distortion, judge then whether luminance deviation and chromaticity distortion exceed threshold range, if do not exceed threshold range, then the output pixel normal information detects next pixel; When all pixels of picture to be measured all detect when finishing, detect next picture to be measured according to actual needs, perhaps detect next LCD panel.If exceed threshold range, output pixel abnormal information then, and unusual luminance deviation in luminance deviation and chromaticity distortion and the database and unusual chromaticity distortion contrast, as if record is arranged, then according in the database accordingly diagnostic message abnormal pixel is carried out diagnostic process; If no record, then abnormal pixel is analyzed, and definite diagnostic message, the abnormal data and the diagnostic message of this abnormal pixel correspondence stored in the database.Each pixel to picture to be measured compares successively, detects.
In technique scheme, the way of contrast of monochrome information and chrominance information can contrast for each pixel around each single pixel and its between the pixel, also can be to compare successively between the pixel of horizontal ordinate or ordinate unanimity, perhaps all pixels in certain zone compare etc., or the combination of these way of contrast.
Semi-manufacture LCD panel after the present invention also can finish the cell operation carries out the detection of image quality, needs during enforcement to install polaroid additional between LCD display to be checked and acquisition module.
The present invention is easy to realize to the detection automaticity height of picture quality, the accuracy of detection height, and the efficient height has reduced labour intensity, has guaranteed product quality.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (6)
1. LCD display effect pick-up unit is characterized in that comprising:
Acquisition module is used for gathering from display screen the light signal of picture to be measured, this light signal is converted into electric signal and sends;
Detection module, be connected with described acquisition module, be used for the brightness and the colourity of described picture pixel to be measured being analyzed and being handled according to described electric signal, the brightness and the chrominance information that contrast each pixel obtain luminance deviation and chromaticity distortion, for exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel abnormal information.
2. LCD display effect pick-up unit according to claim 1 is characterized in that, also comprises: signal output module, described signal output module is connected with detection module, is used for sending picture signal to be measured to described display screen.
3. a LCD display effect detection method is characterized in that, comprising:
Step 100, gather the light signal of picture to be measured, this light signal is converted to electric signal and sends from display screen;
Step 200, extract the brightness and the chrominance information of pixel and handle according to described electric signal, the brightness and the chrominance information that contrast each pixel obtain luminance deviation and chromaticity distortion, for exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel abnormal information.
4. LCD display effect detection method according to claim 3 is characterized in that, also comprises before the described step 100: export picture signal to be measured to described display screen.
5. LCD display effect detection method according to claim 3 is characterized in that described step 200 is specially:
According to the brightness and the chrominance information of described electric signal extraction pixel, the brightness and the chrominance information that contrast each pixel obtain luminance deviation and chromaticity distortion;
To exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel abnormal information; To not exceeding luminance deviation and/or the chromaticity distortion that preestablishes threshold range, output pixel normal information.
6. LCD display effect detection method according to claim 3 is characterized in that, also comprises after the described step 200:
Historical data in step 300, the luminance deviation that will exceed threshold range and/or chromaticity distortion and the database contrasts, if record is arranged, then carries out diagnostic process according to corresponding diagnostic message in the described database; If no record, then execution in step 310;
Step 310, the abnormal pixel that luminance deviation and/or chromaticity distortion are exceeded threshold range are analyzed, and definite diagnostic message, execution in step 330;
Step 320, the abnormal data and the diagnostic message of described abnormal pixel correspondence stored in the database;
Step 330, end.
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| CN104316191B (en) * | 2014-11-07 | 2017-02-15 | 京东方科技集团股份有限公司 | Chroma testing method and chroma testing device |
| CN106597815B (en) * | 2017-01-20 | 2021-01-22 | 京东方科技集团股份有限公司 | Illumination intensity adjusting device, system and method |
| CN107942554B (en) * | 2018-01-12 | 2020-07-14 | 京东方科技集团股份有限公司 | Display screen detection device |
| CN109819246A (en) * | 2019-02-18 | 2019-05-28 | 珠海格力电器股份有限公司 | Detection device and detection method, the device of LED display terminal |
| CN110767133A (en) * | 2019-11-08 | 2020-02-07 | 北京转转精神科技有限责任公司 | Automatic inspection method for original screen |
| CN111131905A (en) * | 2019-12-30 | 2020-05-08 | 深圳Tcl数字技术有限公司 | Image quality detection method, device, equipment and storage medium |
| CN115314707B (en) * | 2022-10-11 | 2023-04-25 | 中兴系统技术有限公司 | Rail transit LCD screen fault detection method and system |
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Non-Patent Citations (2)
| Title |
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| 何俊辉等.SR-3A分光辐射计在平板显示器性能测试中的应用.《国外电子测量技术》.2007,(第01期),60-63. * |
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