CN103033343A - 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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- CN103033343A CN103033343A CN2012105397456A CN201210539745A CN103033343A CN 103033343 A CN103033343 A CN 103033343A CN 2012105397456 A CN2012105397456 A CN 2012105397456A CN 201210539745 A CN201210539745 A CN 201210539745A CN 103033343 A CN103033343 A CN 103033343A
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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, relate in particular to method and the device of sub-pix (RGB) skew in a kind of sense colors optical filter.
Background technology
Referring to Fig. 1, be the synoptic diagram of RGB in the colored filter, it prizes diaphragm area in the situation through backlight LED light irradiation, presents different colors according to the characteristic of RGB own.Referring to Fig. 2, for CCD (Charge-Coupled Device, charge coupled cell) presents different GTG values from the diaphragm area of prizing by the colored filter of LED irradiation.Fig. 3 is (the Automatic OpticInspection of AOI in the prior art, automated optical detects) obtain the colored filter under normal circumstances synoptic diagram of gray scale variation waveform of diaphragm area of prizing, wherein horizontal ordinate represents position coordinates, ordinate represents the GTG value that position coordinates is corresponding, GTG value scope 0～255.
In the unusual detection method of existing colored filter, whether be threshold value of unusual definition to detecting this point, it is the same that the detection of each point is set.As shown in Figure 4, a grey defective 40 is arranged on the red area.Referring to Fig. 5,2. the effect of the GTG of the color diaphragm area that obtains for CCD wherein is the GTG value of abnormity point, 1. 3. 4. 5. is the GTG value of normal point.
The computing method of existing detection abnormity point are as follows: 2. at first establish is the minimum value of these 5 middle GTG values, then this GTG value of 5 is carried out from little arrival ordering: 2. 1. 3. 4. 5..This value that the GTG value comes the centre after the GTG value of the point that needs are detected and 5 orderings compares, and difference is for 2.-3.; If the Recipe detection threshold is X, if then difference is 2.-and 3. absolute value is greater than threshold X, then 2. is abnormity point.
Yet, in existing unusual detection technique, when the sub-pix skew occurs, 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 with 5 above-mentioned relative methods, AOI can think that Offset portion is normal part, cause to detect unusual in the colored filter, therefore when carrying out abnormality detection, be necessary to judge whether occur the sub-pix skew in the color diaphragm area.
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, strengthen 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 the described colored filter, and generate the gray scale variation waveform;
Obtain the quantity of the unusual crest in the gray scale variation waveform of described color diaphragm area;
The amount threshold of the quantity of the unusual crest in the described gray scale variation waveform that relatively obtains and the unusual crest of presetting;
When the quantity of the unusual crest in the described gray scale variation waveform that obtains during greater than the amount threshold of described default unusual crest, judge in the color diaphragm area of detected colored filter the sub-pix skew to occur.
Alternatively, the step of the quantity of the unusual crest in the described gray scale variation waveform that obtains described color diaphragm area comprises:
According to described gray scale variation waveform, and the threshold value of default X-wave peak value, obtain the quantity of the unusual crest in the gray scale variation waveform of described color diaphragm area.
Alternatively, the step of described generation gray scale variation waveform comprises:
Obtain the prize correlation parameter of gray scale variation in the diaphragm area of detected colored filter;
According to the correlation parameter of the described gray scale variation of obtaining, and the threshold value of default GTG exceptional value, the gray scale variation waveform of the color diaphragm area in the colored filter that generation is detected.
Alternatively, described method also comprises:
Set in advance the amount threshold of the threshold value of described default GTG exceptional value, described default unusual crest and the threshold value of described default X-wave peak value.
Alternatively, described method also comprises:
When the sub-pix skew in judging detected color diaphragm area, occurring, 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 detection of the gray scale variation of the color diaphragm area in the described colored filter, and generates the gray scale variation waveform;
The crest acquisition module is used for obtaining the quantity of unusual crest of the gray scale variation waveform of color diaphragm area;
Comparison module is used for the quantity of unusual crest of the gray scale variation waveform relatively obtain and the amount threshold of default unusual crest;
Determination module is used for when the quantity of the unusual crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest, judges that detected colored filter is prized sub-pix to occur in the diaphragm area and be offset.
Alternatively, described crest acquisition module comprises: the crest acquiring unit, be used for according to described gray scale variation waveform, and the threshold value of default X-wave peak value, and obtain the quantity of the unusual crest in the gray scale variation waveform.
Alternatively, described detection module comprises: the GTG acquiring unit is used for obtaining the prize correlation parameter of diaphragm area gray scale variation of colored filter;
The waveform generation unit is used for according to the correlation parameter that obtains gray scale variation, and the threshold value of default GTG exceptional value, generates the prize gray scale variation waveform of diaphragm area of detected colored filter.
Alternatively, described device also comprises: module is set, is used for setting in advance the amount threshold of the threshold value of described default GTG exceptional value, described default unusual crest and the threshold value of described default X-wave peak value.
Alternatively, described device also comprises: reminding module when the sub-pix skew occurring for the diaphragm area of prizing when the detected colored filter of judgement, sends information.
As shown from the above technical solution, embodiments of the invention have following beneficial effect: the quantity of the unusual crest that utilization is obtained compares with the amount threshold of the unusual crest of presetting, when the quantity of the unusual crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest, can judge and occur the sub-pix skew in the color diaphragm area, solve the technical matters that whether the monitoring sub-pix is offset in the process of making colored filter, thereby can strengthen the Quality Detection to colored filter.
Description of drawings
Fig. 1 represents the synoptic diagram of colored filter RGB under normal circumstances in the prior art;
Fig. 2 represents that AOI obtains the under normal circumstances synoptic diagram of RGB (greyish white) of colored filter in the prior art;
Fig. 3 represents that AOI obtains under normal circumstances gray scale variation waveform synoptic diagram of colored filter in the prior art;
Fig. 4 represents in the prior art synoptic diagram of the array of figure of RGB and defective in the colored filter;
Fig. 5 represents that AOI in the prior art gets access to the synoptic diagram (greyish white) of array of figure and the defective of RGB in the colored filter;
Fig. 6 represents the method flow diagram of sense colors optical filter Central Asia pixel-shift in the embodiments of the invention;
Fig. 7 represents the synoptic diagram (there is light leakage phenomena in the Red district) of the RGB under the colored filter abnormal conditions in the embodiments of the invention;
Fig. 8 represents that AOI in the embodiments of the invention obtains the synoptic diagram (greyish white, there is light leakage phenomena in the red district) of RGB under the colored filter abnormal conditions;
Fig. 9 represents that AOI obtains gray scale variation waveform synoptic diagram under the colored filter abnormal conditions in the embodiments of the invention;
Figure 10 represents the block diagram of the device of sense colors optical filter Central Asia pixel-shift in the embodiments of the invention.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in the accompanying drawing, yet should be appreciated that and to realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order to understand the disclosure more thoroughly that these embodiment are provided, and can with the scope of the present disclosure complete convey 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.The process flow diagram of the method for the sense colors optical filter Central Asia pixel-shift that specifies according to an embodiment of the invention, is suitable for addressing the above problem below in conjunction with Fig. 6.
As shown in Figure 6, the method for sense colors optical filter of the present invention Central Asia pixel-shift starts from step S610.In step S610, the gray scale variation of the color diaphragm area in the sense colors optical filter, and generate the gray scale variation waveform;
Particularly, at first obtain the correlation parameter of gray scale variation in the color diaphragm area, this correlation parameter comprises the GTG value of red, green and blue in the color diaphragm area; Then basis is obtained the correlation parameter of gray scale variation, and the threshold value of default GTG exceptional value, generates the gray scale variation waveform of detected color diaphragm area.
Namely, at first detect by the color diaphragm area to colored filter, calculate the GTG value of red, green and blue in the color diaphragm area that is detected colored filter, then according to the threshold value of default GTG exceptional value, generate the gray scale variation waveform, as shown in Figure 9.
Subsequently, in step S620, obtain the quantity of the unusual crest in the gray scale variation waveform of detected color diaphragm area.
Alternatively, in step S620, according to the gray scale variation waveform, and the threshold value of default X-wave peak value, obtain the quantity of the unusual crest of gray scale variation waveform.Under normal circumstances, the sub-pix skew can not occur in the colored filter; When the sub-pix skew occurring, the glue that netrual colour on the segment glass can occur, the transmitance of this part light is higher, in the gray scale variation waveform, when the light amount ratio that receives as CCD was more, the GTG value was just high, can form the crest in the gray scale variation waveform this moment, when crest value surpassed the threshold value of default X-wave peak value, it was unusual to show that this crest occurs, and this crest is unusual crest.
Subsequently, in step S630, the amount threshold of the quantity of the unusual crest in the gray scale variation waveform that relatively obtains and the unusual crest of presetting.
Subsequently, in step S640, when the quantity of the crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest, can judge to occur the sub-pix skew in the detected color diaphragm area.
Namely, can preset the amount threshold of unusual crest, then manage by the quantity to unusual crest, when the quantity of unusual crest during greater than the amount threshold of default unusual crest, can judge to occur the sub-pix skew in the detected color diaphragm area.
Referring to Fig. 7, be the synoptic diagram (there is light leakage phenomena 71 in the Red district) of the RGB under the colored filter abnormal conditions.Colored filter shown in Figure 7 is carried out GTG process, can obtain the synoptic diagram of RGB as shown in Figure 8, Fig. 8 is the synoptic diagram (greyish white, there is light leakage phenomena 71 in the red district) that AOI obtains RGB under the colored filter abnormal conditions.Then the synoptic diagram of RGB shown in Figure 8 carried out wave form analysis, can obtain gray scale variation waveform synoptic diagram as shown in Figure 9, Fig. 9 is that AOI obtains gray scale variation waveform synoptic diagram under the colored filter abnormal conditions, wherein horizontal ordinate represents position coordinates, ordinate represents the GTG value that position coordinates is corresponding, GTG value scope 0～255, wherein 91 is the threshold value of the X-wave peak value of setting.Be unusual crest by having drawn 4 crests among Fig. 9, the amount threshold of supposing default unusual crest is set to 3, since among Fig. 9 the quantity of unusual crest be 4 greater than 3 of the amount threshold of default unusual crest, then can judge to occur the sub-pix skew in the detected colored filter.
In step S650, when the sub-pix skew in judging detected color diaphragm area, occurring, send information subsequently.
Namely, according to above step color diaphragm area is detected, obtain out the gray scale variation waveform of detected color diaphragm area according to each point GTG value, then the crest of waveform managed, the amount threshold of unusual GTG threshold value and unusual crest is set, if when detecting the quantity of unusual crest and exceeding the amount threshold of default unusual crest, then can think: the sub-pix skew is arranged in the color diaphragm area, can send information this moment to the staff, thereby 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: set in advance the threshold value of default GTG exceptional value, the threshold value that sets in advance the amount threshold of unusual crest and set in advance default X-wave peak value.
Need to prove, method shown in Figure 6 do not limit by shown in the order of each step carry out, can adjust as required the sequencing of each step.In addition, the step in the method shown in Figure 6 also is not limited to the division of above-mentioned steps, and above-mentioned steps can split into further more that multi-step also can be merged into still less step.
As shown in figure 10, be the block diagram of the device of sense colors optical filter Central Asia pixel-shift in the embodiments of the invention, this device comprises: detection module 101 for detection of the gray scale variation of the color diaphragm area in the colored filter, and generates the gray scale variation waveform; Crest acquisition module 102 is used for obtaining the quantity of unusual crest of the gray scale variation waveform of detected color diaphragm area; Comparison module 103 is used for the quantity of unusual crest of the gray scale variation waveform relatively obtain and the amount threshold of default unusual crest; Determination module 104 is used for judging that when the quantity of the unusual crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest occurring sub-pix in the detected color diaphragm area is offset.
In one embodiment of the invention, crest acquisition module 102 comprises: the crest acquiring unit, be used for according to the gray scale variation waveform, and the threshold value of default X-wave peak value, and obtain the quantity of the unusual crest in the gray scale variation waveform.
In one embodiment of the invention, detection module 101 comprises: the GTG acquiring unit is used for obtaining the prize unusual correlation parameter of GTG of diaphragm area of colored filter; The waveform generation unit is used for according to the unusual correlation parameter of GTG that obtains, and the threshold value of default GTG exceptional value, generates the gray scale variation waveform of detected color diaphragm area.
In one embodiment of the invention, this device also comprises: module is set, is used for setting in advance the amount threshold of the threshold value of default GTG exceptional value, default unusual crest and the threshold value of default X-wave peak value.
In one embodiment of the invention, this device also comprises: reminding module 105 is used for sending information when judging that the sub-pix skew appears in detected color diaphragm area.
As shown from the above technical solution, embodiments of the invention have following beneficial effect: the quantity of the unusual crest that utilization is obtained compares with the amount threshold of the unusual crest of presetting, when the quantity of the unusual crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest, can judge and occur the sub-pix skew in the color diaphragm area, solve the technical matters that whether the monitoring sub-pix is offset in the process of making colored filter, thereby can strengthen the Quality Detection to colored filter.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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. the method for a 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 the described colored filter, and generate the gray scale variation waveform;
Obtain the quantity of the unusual crest in the gray scale variation waveform of described color diaphragm area;
The amount threshold of the quantity of the unusual crest in the described gray scale variation waveform that relatively obtains and the unusual crest of presetting;
When the quantity of the unusual crest in the described gray scale variation waveform that obtains during greater than the amount threshold of described default unusual crest, judge in the color diaphragm area of detected colored filter the sub-pix skew to occur.
2. method according to claim 1 is characterized in that, the step of the quantity of the unusual crest in the described gray scale variation waveform that obtains described color diaphragm area comprises:
According to described gray scale variation waveform, and the threshold value of default X-wave peak value, obtain the quantity of the unusual 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 the prize correlation parameter of gray scale variation in the diaphragm area of detected colored filter;
According to the correlation parameter of the described gray scale variation of obtaining, and the threshold value of default GTG exceptional value, the gray scale variation waveform of the color diaphragm area in the colored filter that generation is detected.
4. method according to claim 3 is characterized in that, described method also comprises:
Set in advance the amount threshold of the threshold value of described default GTG exceptional value, described default unusual 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 the sub-pix skew in judging detected color diaphragm area, occurring, send information.
6. the device of a sense colors optical filter Central Asia pixel-shift is characterized in that described device comprises:
Detection module for detection of the gray scale variation of the color diaphragm area in the described colored filter, and generates the gray scale variation waveform;
The crest acquisition module is used for obtaining the quantity of unusual crest of the gray scale variation waveform of color diaphragm area;
Comparison module is used for the quantity of unusual crest of the gray scale variation waveform relatively obtain and the amount threshold of default unusual crest;
Determination module is used for when the quantity of the unusual crest of the gray scale variation waveform that obtains during greater than the amount threshold of default unusual crest, judges that detected colored filter is prized sub-pix to occur in the diaphragm area and be offset.
7. device according to claim 6 is characterized in that, described crest acquisition module comprises:
The crest acquiring unit is used for according to described gray scale variation waveform, and the threshold value of default X-wave peak value, obtains the quantity of the unusual crest in the gray scale variation waveform.
8. device according to claim 6 is characterized in that, described detection module comprises:
The GTG acquiring unit is used for obtaining the prize correlation parameter of diaphragm area gray scale variation of colored filter;
The waveform generation unit is used for according to the correlation parameter that obtains gray scale variation, and the threshold value of default GTG exceptional value, generates the prize gray scale variation waveform of diaphragm area of detected colored filter.
9. device according to claim 8 is characterized in that, described device also comprises:
Module is set, is used for setting in advance the amount threshold of the threshold value of described default GTG exceptional value, described default unusual crest and the threshold value of described default X-wave peak value.
10. device according to claim 6 is characterized in that, described device also comprises:
Reminding module when the sub-pix skew occurring for the diaphragm area of prizing when the detected colored filter of judgement, sends information.
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