CN103033343B - Method and device of detecting sub-pixel deviation in color filter - Google Patents
Method and device of detecting sub-pixel deviation in color filter Download PDFInfo
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- CN103033343B CN103033343B CN201210539745.6A CN201210539745A CN103033343B CN 103033343 B CN103033343 B CN 103033343B CN 201210539745 A CN201210539745 A CN 201210539745A CN 103033343 B CN103033343 B CN 103033343B
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Abstract
The invention provides a method for detecting sub-pixel deviation in a color filter and a device of detecting the sub-pixel deviation in the color filter. The method for detecting the sub-pixel deviation in the color filter comprises the following steps: detecting gray scale change of a color film zone in the color filter and generating a gray scale wave form; acquiring the number of unusual wave crest in the gray scale change wave form of the color film zone; comparing the number of the unusual wave crest in the gray scale change wave form with a preset number of threshold value of the unusual wave crest; and deciding the sub-pixel deviation is appeared in the color film zone of the color filter to be detected, when the number of the unusual wave crest in the acquired gray scale change wave form is larger than the preset number of the threshold value of the unusual wave crest. Therefore, the technical problem of monitoring whether the sub-pixel is deviationed or not in the process of manufacturing the color filter is solved, and therefore the quality detection of the color filter is strengthened.
Description
Technical field
The present invention relates to photoelectric detection technology field, particularly relate to method and device that in a kind of sense colors optical filter, sub-pix (RGB) offsets.
Background technology
See Fig. 1, be the schematic diagram of RGB in colored filter, it prizes diaphragm area when irradiating through backlight LED light, presents different colors according to the characteristic of RGB own.See Fig. 2, for CCD (Charge-Coupled Device, charge coupled cell) presents different grey decision-making from the diaphragm area of prizing of the colored filter by LED illumination.Fig. 3 is AOI (Automatic OpticInspection in prior art, automatic optics inspection) obtain colored filter and to prize the schematic diagram of diaphragm area gray scale variation waveform under normal circumstances, wherein horizontal ordinate represents position coordinates, ordinate represents the grey decision-making that position coordinates is corresponding, grey decision-making scope 0 ~ 255.
Whether in the detection method of the exception of existing colored filter, being exception definition threshold value to this point of detection, is the same to the detection setting of each point.As shown in Figure 4, red area there is a grey defect 40.See Fig. 5, be the effect of the GTG of the color diaphragm area of CCD acquisition, 5. 4. 3. be 2. wherein the grey decision-making of abnormity point, be 1. the grey decision-making of normal point.
The computing method of existing detection abnormity point are as follows: 2. first establish is the minimum value of these 5 middle grey decision-making, then carry out from little arrival sequence to this grey decision-making of 5: 2. 1. 3. 4. 5..This value needing the grey decision-making of the point detected and 5 afterwards grey decision-making that sorts to come centre is compared, difference be 2.-3.; If Recipe detection threshold is X, if then difference is 2.-and absolute value is 3. greater than threshold X, then and 2. put is abnormity point.
But, in existing abnormal detection technique, when the skew of generation sub-pix, when utilizing 5 above-mentioned relative methods to detect, because black matrix (Mask) skew can cause the overall offset of color diaphragm area, and detect by above-mentioned five relative methods, AOI can think that Offset portion is normal part, cause detecting the exception in colored filter, therefore when carrying out abnormality detection, be necessary to judge in color diaphragm area, whether to occur that sub-pix offsets.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides method and the device of a kind of sense colors optical filter Central Asia pixel-shift, strengthening the Quality Detection to colored filter.
According to an aspect of the present invention, provide the method for a kind of sense colors optical filter Central Asia pixel-shift, described method comprises:
Detect the gray scale variation of the color diaphragm area in described colored filter, and generate gray scale variation waveform;
Obtain the quantity of the abnormal crest in the gray scale variation waveform of described color diaphragm area;
The quantity of the abnormal crest in the described gray scale variation waveform relatively obtained and the amount threshold of default abnormal crest;
When the quantity of the abnormal crest in the described gray scale variation waveform obtained is greater than the amount threshold of described default abnormal crest, judge to occur that sub-pix offsets in the color diaphragm area of detected colored filter.
Alternatively, the step of the quantity of the abnormal crest in the gray scale variation waveform of the described color diaphragm area of described acquisition comprises:
According to described gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest in the gray scale variation waveform of described color diaphragm area.
Alternatively, the step of described generation gray scale variation waveform comprises:
Obtain detected colored filter to prize the correlation parameter of gray scale variation in diaphragm area;
According to the correlation parameter of the described gray scale variation obtained, and the threshold value of the GTG exceptional value preset, generate the gray scale variation waveform of the color diaphragm area in detected colored filter.
Alternatively, described method also comprises:
Pre-set the threshold value of described default GTG exceptional value, the amount threshold of described default abnormal crest and the threshold value of described default X-wave peak value.
Alternatively, described method also comprises:
When judging to occur that sub-pix offsets in detected color diaphragm area, send information.
According to another aspect of the present invention, provide the device of a kind of sense colors optical filter Central Asia pixel-shift, described device comprises;
Detection module, for detecting the gray scale variation of the color diaphragm area in described colored filter, and generates gray scale variation waveform;
Crest acquisition module, for obtaining the quantity of the abnormal crest in the gray scale variation waveform of color diaphragm area;
Comparison module, for the quantity that compares the abnormal crest in the gray scale variation waveform of acquisition and the amount threshold of abnormal crest preset;
Determination module, for when the quantity of abnormal crest in the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, judges that detected colored filter is prized in diaphragm area and occurs that sub-pix offsets.
Alternatively, described crest acquisition module comprises: crest acquiring unit, for according to described gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest in gray scale variation waveform.
Alternatively, described detection module comprises: GTG acquiring unit, to prize the correlation parameter of gray scale variation in diaphragm area for obtaining colored filter;
Waveform generation unit, for according to obtaining the correlation parameter of gray scale variation, and the threshold value of the GTG exceptional value preset, generating detected colored filter and to prize the gray scale variation waveform of diaphragm area.
Alternatively, described device also comprises: arrange module, for pre-setting the threshold value of the threshold value of described default GTG exceptional value, the amount threshold of described default abnormal crest and described default X-wave peak value.
Alternatively, described device also comprises: reminding module, for when judge detected colored filter prize occur that sub-pix offset in diaphragm area time, transmission information.
As shown from the above technical solution, embodiments of the invention have following beneficial effect: utilize the quantity of the abnormal crest obtained to compare with the amount threshold of the abnormal crest preset, when the quantity of the abnormal crest of the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, can judge to occur that sub-pix offsets in color diaphragm area, solve in the process making colored filter the technical matters monitored sub-pix and whether offset, thus the Quality Detection to colored filter can be strengthened.
Accompanying drawing explanation
Fig. 1 represents the schematic diagram of colored filter RGB under normal circumstances in prior art;
Fig. 2 represents that AOI in prior art obtains the schematic diagram (greyish white) of colored filter RGB under normal circumstances;
Fig. 3 represents that in prior art, AOI obtains colored filter gray scale variation waveform schematic diagram under normal circumstances;
Fig. 4 to represent in prior art the array of figure of RGB and the schematic diagram of defect in colored filter;
Fig. 5 represents that in prior art, AOI gets the array of figure of RGB in colored filter and the schematic diagram (greyish white) of defect;
Fig. 6 represents the method flow diagram of sense colors optical filter Central Asia pixel-shift in embodiments of the invention;
Fig. 7 represents the schematic diagram (there is light leakage phenomena in Red district) of the RGB in embodiments of the invention under colored filter abnormal conditions;
Fig. 8 represents the schematic diagram (greyish white, there is light leakage phenomena in red district) of RGB under AOI acquisition colored filter abnormal conditions in embodiments of the invention;
Fig. 9 to represent in embodiments of the invention that AOI obtains gray scale variation waveform schematic diagram under colored filter abnormal conditions;
Figure 10 represents the block diagram of the device of sense colors optical filter Central Asia pixel-shift in embodiments of the invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
The present invention proposes method and the device of a kind of sense colors optical filter Central Asia pixel-shift.Illustrate according to an embodiment of the invention, be suitable for the process flow diagram of the method for the sense colors optical filter Central Asia pixel-shift solved the problem below in conjunction with Fig. 6.
As shown in Figure 6, the method for the sense colors optical filter Central Asia of the present invention pixel-shift starts from step S610.In step S610, the gray scale variation of the color diaphragm area in sense colors optical filter, and generate gray scale variation waveform;
Particularly, first obtain the correlation parameter of gray scale variation in color diaphragm area, this correlation parameter comprises the grey decision-making of red, green and blue in color diaphragm area; Then according to the correlation parameter obtaining gray scale variation, and the threshold value of the GTG exceptional value preset, generate the gray scale variation waveform of detected color diaphragm area.
Namely, first by detecting the color diaphragm area of colored filter, calculating the grey decision-making of red, green and blue in the color diaphragm area of detected colored filter, then according to the threshold value of the GTG exceptional value preset, generating gray scale variation waveform, as shown in Figure 9.
Subsequently, in step S620, obtain the quantity of the abnormal crest in the gray scale variation waveform of detected color diaphragm area.
Alternatively, in step S620, according to gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest of gray scale variation waveform.Under normal circumstances, sub-pix skew can not be there is in colored filter; When occurring that sub-pix offsets, there will be the glue of netrual colour on segment glass, the transmitance of this part light is higher, in gray scale variation waveform, when the light amount ratio that CCD receives is more, grey decision-making is just high, now can form the crest in gray scale variation waveform, when crest value exceedes the threshold value of default X-wave peak value, show that this crest occurs abnormal, this crest is abnormal crest.
Subsequently, in step S630, compare the quantity of the abnormal crest in the gray scale variation waveform of acquisition and the amount threshold of default abnormal crest.
Subsequently, in step S640, when the quantity of the crest of the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, can judge to occur that sub-pix offsets in the color diaphragm area be detected.
Namely, the amount threshold of abnormal crest can being preset, then by managing the quantity of abnormal crest, when the quantity of abnormal crest is greater than the amount threshold of default abnormal crest, can judge to occur that sub-pix offsets in the color diaphragm area be detected.
See Fig. 7, it is the schematic diagram (there is light leakage phenomena 71 in Red district) of the RGB under colored filter abnormal conditions.Carry out GTG process to the colored filter shown in Fig. 7, can obtain the schematic diagram of RGB as shown in Figure 8, Fig. 8 is the schematic diagram (greyish white, there is light leakage phenomena 71 in red district) of RGB under AOI acquisition colored filter abnormal conditions.Then wave form analysis is carried out to the schematic diagram of the RGB shown in Fig. 8, gray scale variation waveform schematic diagram as shown in Figure 9 can be obtained, Fig. 9 is gray scale variation waveform schematic diagram under AOI acquisition colored filter abnormal conditions, wherein horizontal ordinate represents position coordinates, ordinate represents the grey decision-making that position coordinates is corresponding, grey decision-making scope 0 ~ 255, wherein 91 is the threshold value of X-wave peak value arranged.By having shown in Fig. 9 that 4 crests are abnormal crest, suppose that the amount threshold of the abnormal crest preset is set to 3, quantity due to crest abnormal in Fig. 9 is 4 amount threshold 3 being greater than default abnormal crest, then can judge to occur that sub-pix offsets in the colored filter be detected.
Subsequently in step S650, when judging to occur that sub-pix offsets in detected color diaphragm area, send information.
Namely, according to above step, color diaphragm area is detected, the gray scale variation waveform of detected color diaphragm area is obtained out according to each point grey decision-making, then the crest of waveform is managed, the amount threshold of abnormal GTG threshold value and abnormal crest is set, if when detecting that the quantity of abnormal crest exceeds the amount threshold of default abnormal crest, then can think: in color diaphragm area, have sub-pix to offset, now can send information to staff, thus strengthen the detection to the color diaphragm area quality of colored filter.
Alternatively, in one embodiment of the invention, before step S610, the method also can comprise: the threshold value pre-setting default GTG exceptional value, the amount threshold pre-setting abnormal crest and pre-set the threshold value of default X-wave peak value.
It should be noted that, the method shown in Fig. 6 does not limit is undertaken by the order of shown each step, can adjust the sequencing of each step as required.In addition, the step in the method shown in Fig. 6 is also not limited to the division of above-mentioned steps, and above-mentioned steps can split into more multi-step further also can be merged into less step.
As shown in Figure 10, be the block diagram of the device of sense colors optical filter Central Asia pixel-shift in embodiments of the invention, this device comprises: detection module 101, for the gray scale variation of the color diaphragm area in sense colors optical filter, and generates gray scale variation waveform; Crest acquisition module 102, for obtaining the quantity of the abnormal crest in the gray scale variation waveform of detected color diaphragm area; Comparison module 103, for the quantity that compares the abnormal crest in the gray scale variation waveform of acquisition and the amount threshold of abnormal crest preset; Determination module 104, when the quantity for the abnormal crest when the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, judges to occur that sub-pix offsets in detected color diaphragm area.
In one embodiment of the invention, crest acquisition module 102 comprises: crest acquiring unit, for according to gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest in gray scale variation waveform.
In one embodiment of the invention, detection module 101 comprises: GTG acquiring unit, to prize the correlation parameter of the GTG exception in diaphragm area for obtaining colored filter; Waveform generation unit, for the correlation parameter according to the GTG exception obtained, and the threshold value of the GTG exceptional value preset, generate the gray scale variation waveform of detected color diaphragm area.
In one embodiment of the invention, this device also comprises: arrange module, for pre-setting the threshold value of the threshold value of default GTG exceptional value, the amount threshold of default abnormal crest and default X-wave peak value.
In one embodiment of the invention, this device also comprises: reminding module 105, for when judging to occur that sub-pix offsets in detected color diaphragm area, sends information.
As shown from the above technical solution, embodiments of the invention have following beneficial effect: utilize the quantity of the abnormal crest obtained to compare with the amount threshold of the abnormal crest preset, when the quantity of the abnormal crest of the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, can judge to occur that sub-pix offsets in color diaphragm area, solve in the process making colored filter the technical matters monitored sub-pix and whether offset, thus the Quality Detection to colored filter can be strengthened.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a method for sense colors optical filter Central Asia pixel-shift, is characterized in that, described method comprises:
Detect the gray scale variation of the color diaphragm area in described colored filter, and generate gray scale variation waveform;
Obtain the quantity of the abnormal crest in the gray scale variation waveform of described color diaphragm area;
The quantity of the abnormal crest in the described gray scale variation waveform relatively obtained and the amount threshold of default abnormal crest;
When the quantity of the abnormal crest in the described gray scale variation waveform obtained is greater than the amount threshold of described default abnormal crest, judge to occur that sub-pix offsets in the color diaphragm area of detected colored filter.
2. method according to claim 1, is characterized in that, the step of the quantity of the abnormal crest in the gray scale variation waveform of the described color diaphragm area of described acquisition comprises:
According to described gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest in the gray scale variation waveform of described color diaphragm area.
3. method according to claim 1, is characterized in that, the step of described generation gray scale variation waveform comprises:
Obtain detected colored filter to prize the correlation parameter of gray scale variation in diaphragm area;
According to the correlation parameter of the described gray scale variation obtained, and the threshold value of the GTG exceptional value preset, generate the gray scale variation waveform of the color diaphragm area in detected colored filter.
4. method according to claim 3, is characterized in that, described method also comprises:
Pre-set the threshold value of described default GTG exceptional value, the amount threshold of described default abnormal crest and the threshold value of described default X-wave peak value.
5. method according to claim 1, is characterized in that, described method also comprises:
When judging to occur that sub-pix offsets in detected color diaphragm area, send information.
6. a device for sense colors optical filter Central Asia pixel-shift, is characterized in that, described device comprises:
Detection module, for detecting the gray scale variation of the color diaphragm area in described colored filter, and generates gray scale variation waveform;
Crest acquisition module, for obtaining the quantity of the abnormal crest in the gray scale variation waveform of color diaphragm area;
Comparison module, for the quantity that compares the abnormal crest in the gray scale variation waveform of acquisition and the amount threshold of abnormal crest preset;
Determination module, for when the quantity of abnormal crest in the gray scale variation waveform obtained is greater than the amount threshold of default abnormal crest, judges that detected colored filter is prized in diaphragm area and occurs that sub-pix offsets.
7. device according to claim 6, is characterized in that, described crest acquisition module comprises:
Crest acquiring unit, for according to described gray scale variation waveform, and the threshold value of the X-wave peak value preset, obtain the quantity of the abnormal crest in gray scale variation waveform.
8. device according to claim 6, is characterized in that, described detection module comprises:
GTG acquiring unit, to prize the correlation parameter of gray scale variation in diaphragm area for obtaining colored filter;
Waveform generation unit, for according to obtaining the correlation parameter of gray scale variation, and the threshold value of the GTG exceptional value preset, generating detected colored filter and to prize the gray scale variation waveform of diaphragm area.
9. device according to claim 8, is characterized in that, described device also comprises:
Module is set, for pre-setting the threshold value of the threshold value of described default GTG exceptional value, the amount threshold of described default abnormal crest and described default X-wave peak value.
10. device according to claim 6, is characterized in that, described device also comprises:
Reminding module, for when judge detected colored filter prize occur that sub-pix offset in diaphragm area time, transmission information.
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| CN104460104B (en) * | 2014-12-26 | 2017-07-21 | 深圳市华星光电技术有限公司 | The method for determining the edge of color filter block and the overlapping region of black matrix |
| CN107727654B (en) * | 2017-09-29 | 2019-12-24 | 绵阳京东方光电科技有限公司 | Film detection method, device and system |
| CN110018525B (en) * | 2019-04-18 | 2020-06-30 | 长春精仪光电技术有限公司 | Electronic identification type optical filter module device and application method thereof |
| CN110415663B (en) * | 2019-07-24 | 2020-10-13 | 深圳市华星光电技术有限公司 | Warning method and warning device for monitoring color cast of display panel |
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| US6779159B2 (en) * | 2001-06-08 | 2004-08-17 | Sumitomo Mitsubishi Silicon Corporation | Defect inspection method and defect inspection apparatus |
| KR100535563B1 (en) * | 2003-05-30 | 2005-12-08 | 삼성코닝정밀유리 주식회사 | Line-scan Inspection process with tilted moving TFT-LCD glass substrate |
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