CN104166250A - Flat panel display panel uniformity detection method and system - Google Patents
Flat panel display panel uniformity detection method and system Download PDFInfo
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- CN104166250A CN104166250A CN201310186009.1A CN201310186009A CN104166250A CN 104166250 A CN104166250 A CN 104166250A CN 201310186009 A CN201310186009 A CN 201310186009A CN 104166250 A CN104166250 A CN 104166250A
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Abstract
The invention discloses a flat panel display panel uniformity detection method and system. The detection method comprises the following steps that a frame generating unit generates a frame to be detected according to a control instruction, wherein the frame to be detected is used for being displayed on a panel to be detected; a frame obtaining unit shoots the frame which is to be detected and is displayed on the panel to be detected so that a detection frame comprising a plurality of detection areas and a plurality of contrast areas can be generated; a processing unit detects a minimum pixel value from each detection area of the detection frame, selects a pixel from one contrast area in the detection frame and takes the value of the pixel of the contrast area as a pixel reference value; a detection unit detects in the detection frame whether at least one minimum pixel value smaller than the pixel reference value exists or not, and if yes, the detection unit determines that the panel to be detected is a panel with non-uniform brightness.
Description
Technical field
The present invention relates to a kind of detection method and system thereof, particularly relate to a kind of flat display panel uniformity coefficient detection method and system thereof.
Background technology
Along with science and technology development with rapid changepl. never-ending changes and improvements and progress, people are more and more higher for the requirement of audiovisual media product, therefore flat display panel dimensionally evolution have increasing trend, and become in size the lifting of also wishing to take into account quality in large.
In view of this, many countries have all dropped into a large amount of manpowers and fund is carried out the research of display technique aspect in the world, imaging technique is promoted fast, but under a large amount of market demands, when factory manufactures in a large number, the defect (the Mura defect of for example often hearing) causing in many artificial and processing procedure factors, the problems such as the video picture brightness irregularities causing all can make product quality greatly decline, but these defects initial stage that produces is often difficult for being discovered by human eye, therefore just need to be dependent on a set of complete and accurate detection system, liquid crystal display is carried out to the detection of luminance uniformity and color, just can accurately detect defective locations and size at the product defects initial stage that produces, product is carried out to accurate detection and keyholed back plate, and then improve the quality of products.
In common detection method, mainly the light-emitting area of measured panel is divided into nine equal portions, and pass through pick-up unit, as, one of them detecting instrument of BM-5A, BM-7A, CS-200O and CA-210 detects its brightness value and chromatic value one by one, in the time that the measured panel quantity of needs inspections is large, use this mode very consuming time and also need to buy more coherent detection instrument, thereby cause testing cost to improve, therefore, be necessary seeking solution.
Summary of the invention
The object of the present invention is to provide a kind of flat display panel uniformity coefficient detection method.
Flat display panel uniformity coefficient detection method of the present invention, be implemented in a uniformity coefficient detection system, this uniformity coefficient detection system comprises a picture generation unit, at least one measured panel, one taking unit, one processing unit and a detecting unit, this detection method comprises the following step: (A) this picture generation unit produces the picture to be measured for being presented at this measured panel according to a steering order, wherein, this picture to be measured comprises multiple districts to be measured and multiple check plot, and each district to be measured has multiple the first pixels, each check plot has multiple the second pixels, the pixel value of described the first pixel is all greater than the pixel value of described the second pixel, (B) this taking unit is taken this shown picture to be measured of this measured panel, to produce a detection picture, wherein, this detection picture comprises multiple detection zones and multiple check plot, and each detection zone is the district to be measured corresponding to same position in this picture to be measured in this detection picture, in this detection picture, each check plot is the check plot corresponding to same position in this picture to be measured, (C) this processing unit detects a minimum pixel value respectively from each detection zone of this detection picture, and from a wherein check plot of this detection picture a selected pixel using its pixel value as a pixel reference value, and (D) this detecting unit detects and whether at least has a minimum pixel value and be less than this pixel reference value in this detection picture, if so, this detecting unit is judged the panel of this measured panel as a brightness irregularities.
Flat display panel uniformity coefficient detection method of the present invention, also comprise before the following step in this step (A): (E) this picture generation unit produces the blank picture for being presented at this measured panel, wherein, in this blank picture, the pixel value of all pixels all equates; (F) this taking unit is taken this shown blank picture of this measured panel, and to produce a pending picture, wherein, this pending picture comprises multiple pending districts, and each pending district has multiple pixels; (G) this processing unit calculates the pixel average of each all pixel in pending district from this pending picture; And (H) whether pixel average that this detecting unit is compared each pending district in this pending picture is greater than a threshold value, and this picture generation unit will be sent to corresponding to the comparison result in each pending district by steering order.
Flat display panel uniformity coefficient detection method of the present invention, in this step (A), each check plot of this picture to be measured is for being the pending district of same position in this pending picture that is corresponding to comparison result in step (H), and each district to be measured of this picture to be measured is to be the pending district of same position in no this pending picture corresponding to comparison result in step (H).
Flat display panel uniformity coefficient detection method of the present invention, the area in each the pending district in this pending picture is all identical with each district to be measured of this picture to be measured and the area of each check plot.
Flat display panel uniformity coefficient detection method of the present invention, in this step (A), the pixel value of each of this picture to be measured the first pixel is the corresponding GTG value of the maximum brightness of this measured panel specification, and the pixel value of each the second pixel of this picture to be measured is the corresponding GTG value of minimum brightness of this measured panel specification.
Another object of the present invention is to provide a kind of flat display panel uniformity coefficient detection system.
Flat display panel uniformity coefficient detection system of the present invention, comprises at least one measured panel, a picture generation unit, a taking unit, a processing unit and a detecting unit.This picture generation unit is in order to produce the picture to be measured for being presented at this measured panel according to a steering order.Wherein, this picture to be measured comprises multiple Shi Ce district and multiple check plot, and each district to be measured has multiple the first pixels, and each check plot has multiple the second pixels, and the pixel value of described the first pixel is all greater than the pixel value of described the second pixel.This taking unit is in order to take this shown picture to be measured of this measured panel, to produce a detection picture.Wherein, this detection picture comprises multiple detection zones and multiple check plot, and each detection zone is the district to be measured corresponding to same position in this picture to be measured in this detection picture, in this detection picture, each check plot is the check plot corresponding to same position in this picture to be measured.This processing unit is in order to detect a minimum pixel value respectively from each detection zone of this detection picture, and from a wherein check plot of this detection picture a selected pixel using its pixel value as a pixel reference value.Whether this detecting unit at least has a minimum pixel value in order to detection in this detection picture is less than this pixel reference value, and if so, this detecting unit is judged the panel that this measured panel is brightness irregularities.
Flat display panel uniformity coefficient detection system of the present invention, the pixel value of each of this picture to be measured the first pixel is the corresponding GTG value of the maximum brightness of this measured panel specification, and the pixel value of each the second pixel of this picture to be measured is the corresponding GTG value of minimum brightness of this measured panel specification.
Beneficial effect of the present invention is: the present invention produces this detection picture by this picture generation unit according to steering order, and judge the quality of flat display panel to be measured according to the result of this processing unit by this detecting unit, must not detect one by one brightness value and the chromatic value of flat display panel to be measured, and then accelerate the judgement of flat display panel uniformity coefficient to be measured, and do not need to buy expensive detecting instrument, therefore the present invention can reach the object of saving detection time and testing cost really.
Brief description of the drawings
Fig. 1 is a block schematic diagram, and a preferred embodiment of flat display panel uniformity coefficient detection system of the present invention is described;
Fig. 2 is a process flow diagram, and a preferred embodiment of flat display panel uniformity coefficient detection method of the present invention is described;
Fig. 3 is a schematic diagram, and the pending picture of one first enforcement aspect in the present invention is described;
Fig. 4 is a schematic diagram, and the pending picture of one second enforcement aspect in the present invention is described;
Fig. 5 is a schematic diagram, and the detection picture of this first enforcement aspect in the present invention is described; And
Fig. 6 is a schematic diagram, and the detection picture of this second enforcement aspect in the present invention is described.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Consult Fig. 1, a preferred embodiment of the uniformity coefficient detection method of flat display panel of the present invention realizes with a panel uniformity coefficient detection system.This panel uniformity coefficient detection system comprises a picture generation unit 11, at least one measured panel 12, a taking unit 13, a processing unit 14 and a detecting unit 15.
This picture generation unit 11 is electrically connected with this measured panel 12, and can be in order to produce a picture to be measured according to a steering order, so that this is treated to side picture inputs to this measured panel 12.The enforcement aspect of this taking unit 13 is a CMOS image sensor or a CCD image sensor, but is not limited to this, and this taking unit 13 can be in order to take the picture being presented in this measured panel 12.This taking unit 13 of this processing unit 14 electrical connections also can be in order to process by the picture in captured this measured panel 12 of this taking unit 13.Whether this detecting unit 15 these picture generation units 11 of electrical connection and this processing unit 14 also can be in order to the results according to this processing unit 14, qualified to judge this measured panel 12.
Consult Fig. 2 to Fig. 4, corresponding to system of the present invention, details are as follows for flat display panel uniformity coefficient detection method of the present invention.
Hundred first, and as shown in step 201, the blank picture that this picture generation unit 11 produces for being presented at this measured panel 12, so that this measured panel 12 has identical background color under same light source.In this preferred embodiment, in this blank picture, all pixel values all equate, and (R, G, the B) of described pixel value be (255,255,255), but are not limited to this.
Then,, as shown in step 202, this taking unit 13 is taken the shown blank picture of this measured panel 12, to produce a pending picture 31.
In this preferred embodiment, this pending picture 31 comprises multiple pending districts 311, and each pending district 311 has multiple pixels.
Then,, as shown in step 203, this processing unit 14 calculates the pixel average of each pending district 311 all pixel from this pending picture 31.
In this preferred embodiment, the aspect in the pending district 311 in this pending picture 31 is implemented second in aspect or Fig. 4 as first in Fig. 3 and is implemented shown in aspect, its number can be respectively 9 or 15, but be not limited to this, also can be other numbers, and its scope defining is not limited to rectangle or border circular areas, wherein, can learn from Fig. 3 and Fig. 4, for instance, Mura defect is the corner that occurs in this measured panel.
Then, as shown in step 204, whether the pixel average that this detecting unit 15 is compared each pending district 311 in this pending picture 31 is greater than a threshold value, and will be sent to this picture generation unit 11 corresponding to the comparison result in each pending district 311 by steering order.
In this preferred embodiment, this threshold value is mainly used in tentatively described pending district 311 being divided into two types that must further detect and must not detect, so that the picture area that must not detect in this measured panel 12 is filtered out, and pass on above-mentioned comparison result by steering order.
Then,, as shown in step 205, this picture generation unit 11 produces for being presented at the picture to be measured that this measured panel 12 comprises multiple districts to be measured and multiple check plots according to steering order.In this picture to be measured, each check plot is to be the pending district 311 of same position in this pending picture 31 that is corresponding to comparison result in this step 204, that is, in this picture to be measured, each check plot is corresponding to the picture area that must not detect in this measured panel 12, and each district to be measured is to be the pending district 311 of same position in no this pending picture 31 corresponding to comparison result in this step 204.Wherein, the area in each the pending district 311 in this pending picture 31 is all identical with each district to be measured of this picture to be measured and the area of each check plot, and each district to be measured has multiple the first pixels, each check plot has multiple the second pixels, and the pixel value of described the first pixel is greater than the pixel value of described the second pixel.
In this preferred embodiment, this picture generation unit 11 is set as the pixel value of each the first pixel of this picture to be measured according to steering order the corresponding GTG value of maximum brightness (being 255) of these measured panel 12 specifications, and the pixel value of each the second pixel of this picture to be measured is set as to the corresponding GTG value of minimum brightness of these measured panel 12 specifications.
For instance, White Variation (6W) specification of supposing this measured panel 12 is 1.4, and its maximum brightness is 300nit, the pixel value of each the second pixel is the corresponding GTG value of minimum brightness (214nit) of this measured panel 12.
Then,, as shown in step 206, this taking unit 13 is taken this shown picture to be measured of this measured panel 12, to produce a detection picture 32 (consulting Fig. 5,6).
In this preferred embodiment, this detection picture 32 comprises multiple detection zones 321 and multiple check plot 322, wherein, in this detection picture 32, each detection zone 321 is the district to be measured corresponding to same position in this picture to be measured, and in this detection picture 32, each check plot 322 is the check plot corresponding to same position in this picture to be measured.
For instance, can consult two kinds of different enforcement aspects of Fig. 5 and Fig. 6, wherein, Fig. 5 implements aspect corresponding to first in Fig. 3, and Fig. 6 implements aspect corresponding to second in Fig. 4.
Consult Fig. 2, Fig. 5 and Fig. 6, then, as shown in step 207, this processing unit 14 detects a minimum pixel value respectively from each detection zone 321 of this detection picture 32, and from a wherein check plot 322 of this detection picture 32 a selected pixel using its pixel value as a pixel reference value.
Then,, as shown in step 208, whether this detecting unit 15 detects in this detection picture 32 at least has a minimum pixel value and is less than this pixel reference value.
If the testing result of this step 208 is yes,, as shown in step 209, this detecting unit 15 is judged the panel that this measured panel 12 is brightness irregularities.
Or if the testing result of this step 208 is no,, as shown in step 210, this detecting unit 15 judges that this measured panel 12 is as the uniform panel of brightness.
In sum, the present invention captures the different GTG collocation pictures that produced according to steering order by this picture generation unit 11 by this taking unit 13, and via treatment scheme, produce this detection picture 32, so as to judging the quality of flat display panel to be measured, must not detect one by one brightness value and the chromatic value of flat display panel to be measured, and then accelerate the judgement of flat display panel uniformity coefficient to be measured, also do not need to buy expensive detecting instrument, so really can reach object of the present invention.
As described above, be only preferred embodiment of the present invention, and when not limiting scope of the invention process with this, all simple equivalences of doing according to the claims in the present invention book and description change and modify, and all still belong to scope of the present invention.
Claims (7)
1. a flat display panel uniformity coefficient detection method, be implemented in a panel uniformity coefficient detection system, this uniformity coefficient detection system comprises a picture generation unit, at least one measured panel, a taking unit, a processing unit and a detecting unit, it is characterized in that, this uniformity coefficient detection method comprises the following step:
(A) this picture generation unit produces the picture to be measured for being presented at this measured panel according to a steering order, wherein, this picture to be measured comprises multiple districts to be measured and multiple check plot, and each district to be measured has multiple the first pixels, each check plot has multiple the second pixels, and the pixel value of described the first pixel is all greater than the pixel value of described the second pixel;
(B) this taking unit is taken this shown picture to be measured of this measured panel, to produce a detection picture, wherein, this detection picture comprises multiple detection zones and multiple check plot, and each detection zone is the district to be measured corresponding to same position in this picture to be measured in this detection picture, in this detection picture, each check plot is the check plot corresponding to same position in this picture to be measured;
(C) this processing unit detects a minimum pixel value respectively from each detection zone of this detection picture, and from a wherein check plot of this detection picture a selected pixel using its pixel value as a pixel reference value; And
(D) this detecting unit detects and whether at least has a minimum pixel value and be less than this pixel reference value in this detection picture, and if so, this detecting unit is judged the panel of this measured panel as a brightness irregularities.
2. flat display panel uniformity coefficient detection method according to claim 1, is characterized in that, also comprises before the following step in this step (A):
(E) this picture generation unit produces the blank picture for being presented at this measured panel, and wherein, in this blank picture, the pixel value of all pixels all equates;
(F) this taking unit is taken this shown blank picture of this measured panel, and to produce a pending picture, wherein, this pending picture comprises multiple pending districts, and each pending district has multiple pixels;
(G) this processing unit calculates the pixel average of each all pixel in pending district from this pending picture; And
(H) whether the pixel average that this detecting unit is compared each pending district in this pending picture is greater than a threshold value, and will be sent to this picture generation unit corresponding to the comparison result in each pending district by this steering order.
3. flat display panel uniformity coefficient detection method according to claim 2, it is characterized in that: in this step (A), each check plot of this picture to be measured is for being the pending district of same position in this pending picture that is corresponding to comparison result in step (H), and each district to be measured of this picture to be measured is to be the pending district of same position in no this pending picture corresponding to comparison result in step (H).
4. flat display panel uniformity coefficient detection method according to claim 2, is characterized in that: the area in each the pending district in this pending picture is all identical with each district to be measured of this picture to be measured and the area of each check plot.
5. flat display panel uniformity coefficient detection method according to claim 1, it is characterized in that: in this step (A), the pixel value of each of this picture to be measured the first pixel is the corresponding GTG value of the maximum brightness of this measured panel specification, and the pixel value of each the second pixel of this picture to be measured is the corresponding GTG value of minimum brightness of this measured panel specification.
6. a flat display panel uniformity coefficient detection system, is characterized in that, this uniformity coefficient detection system comprises:
At least one measured panel;
One picture generation unit, in order to produce the picture to be measured for being presented at this measured panel according to a steering order, wherein, this picture to be measured comprises multiple districts to be measured and multiple check plot, and each district to be measured has multiple the first pixels, each check plot has multiple the second pixels, and the pixel value of described the first pixel is all greater than the pixel value of described the second pixel;
One taking unit, in order to take this shown picture to be measured of this measured panel, to produce a detection picture, wherein, this detection picture comprises multiple detection zones and multiple check plot, and each detection zone is the district to be measured corresponding to same position in this picture to be measured in this detection picture, in this detection picture, each check plot is the check plot corresponding to same position in this picture to be measured;
One processing unit, in order to detect a minimum pixel value respectively from each detection zone of this detection picture, and from a wherein check plot of this detection picture a selected pixel using its pixel value as a pixel reference value; And
Whether one detecting unit, at least have a minimum pixel value in order to detection in this detection picture and be less than this pixel reference value, and if so, this detecting unit is judged the panel of this measured panel as a brightness irregularities.
7. flat display panel uniformity coefficient detection system according to claim 6, it is characterized in that: the pixel value of each of this picture to be measured the first pixel is the corresponding GTG value of the maximum brightness of this measured panel specification, and the pixel value of each the second pixel of this picture to be measured is the corresponding GTG value of minimum brightness of this measured panel specification.
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| CN106596068A (en) * | 2016-12-20 | 2017-04-26 | 广州视源电子科技股份有限公司 | Display brightness uniformity detection method and display brightness uniformity detection device |
| CN106646939A (en) * | 2016-11-17 | 2017-05-10 | 南京华东电子信息科技股份有限公司 | Method for detecting Mura defects |
| CN107036787A (en) * | 2017-04-14 | 2017-08-11 | 京东方科技集团股份有限公司 | Detection method and detecting system |
| WO2018090450A1 (en) * | 2016-11-17 | 2018-05-24 | 深圳Tcl新技术有限公司 | Uniformity measurement method and system for display screen |
| CN108873399A (en) * | 2018-06-19 | 2018-11-23 | 信利光电股份有限公司 | A kind of detection method and system of LCD display module backlight luminescence uniformity |
| CN108957799A (en) * | 2018-06-19 | 2018-12-07 | 信利光电股份有限公司 | A kind of detection method of LCD display module backlight uniformity of chromaticity |
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| CN108873399A (en) * | 2018-06-19 | 2018-11-23 | 信利光电股份有限公司 | A kind of detection method and system of LCD display module backlight luminescence uniformity |
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