CN103616775B - Based on the liquid crystal module Auto-Flicker Self-regulation track method of machine vision - Google Patents
Based on the liquid crystal module Auto-Flicker Self-regulation track method of machine vision Download PDFInfo
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- CN103616775B CN103616775B CN201310597891.9A CN201310597891A CN103616775B CN 103616775 B CN103616775 B CN 103616775B CN 201310597891 A CN201310597891 A CN 201310597891A CN 103616775 B CN103616775 B CN 103616775B
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Abstract
The invention discloses a kind of liquid crystal module Auto-Flicker Self-regulation track method based on machine vision, comprise step: open industrial digital camera and flush bonding processor; V-COM value is write according to the effective range of V-COM successively by order from small to large to the V-COM chip of liquid crystal module, when often writing a V-COM value, industrial digital collected by camera n frame picture; Matrixing process is carried out to the n frame picture under each V-COM value, obtains matrix data M
1, M
2, M
3, M
4... M
n; Point of scintillation ratio value K is calculated according to matrix data; The V-COM value of point of scintillation ratio value K and correspondence is write in the storage unit of flush bonding processor; Read the minimum K value in flush bonding processor storage unit, and the V-COM value of correspondence is written in the storer of liquid crystal module V-COM chip, complete adjustment.The Flicker adjustment that the present invention realizes liquid crystal module production line is full-automatic, carries out image acquisition, can characterize the display performance of whole viewing area to the whole viewing area of liquid crystal module.
Description
Technical field
The present invention relates to liquid crystal module field, refer to a kind of liquid crystal module Auto-Flicker Self-regulation track method based on machine vision particularly.
Background technology
V-COM (public electrode voltages) is liquid crystal module Panel(panel) magnitude of voltage holding, determined by the characteristic of liquid crystal and the principle of work of module, there is a positive and negative deflection voltage in Panel driving circuit, V-COM needs the bosom point being arranged on this positive and negative deflection voltage.Ideally, central value and V-pixel(pixel voltage as V-COM) central value consistent and the difference of V-pixelH and V-pixelL and V-COMH and V-COML difference is consistent time there will not be Flicker phenomenon, just there will be Flicker phenomenon when deviation appears in the central value of these two voltages or difference.By adjusting the value of V-COM, the Flicker value of Panel can be adjusted to minimum by we, thus makes the display effect of Panel reach best.
The Flicker(screen flicker degree of current liquid crystal module) value adjusting process generally adopts photoelectricity adjustment method, first a certain region testing Flicker value is needed to place 1 photoelectric sensor at Panel, the light signal of Panel is converted to electric signal by photoelectric sensor, MCU samples one group of electrical signal data within a period of time, calculate the Flicker value under current V-COM voltage, MCU constantly regulates the V-COM value of Panel simultaneously, the corresponding Flicker value of each like this V-COM value, finally can by V-COM value programming progressive die group V-COM chip minimum for Flicker value.
The Flicker value of photoelectricity adjustment method to liquid crystal module is adopted to carry out adjustment, because photoelectric sensor can only gather the data in a certain region of Panel, the Flicker value calculated can only represent the display effect in this region, can not illustrate that the Flicker value of whole Panel has been debugged minimum.In addition, because need artificial a certain viewing area photoelectric sensor being attached to Panel, photoelectricity adjustment method is adopted to be not easy to the robotization of liquid crystal module production line.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of full automatic liquid crystal module Auto-Flicker Self-regulation track method based on machine vision of Flicker adjustment that can realize liquid crystal module production line.
For achieving the above object, a kind of liquid crystal module Auto-Flicker Self-regulation track method based on machine vision designed by the present invention, its special character is, comprises the steps:
1) industrial digital camera and flush bonding processor is opened;
2) successively write V-COM value according to the effective range of V-COM by order from small to large to the V-COM chip of liquid crystal module, often write a V-COM value time, described industrial digital collected by camera n frame picture, n be greater than 1 even number;
3) matrixing process is carried out to the n frame picture under each V-COM value, obtain matrix data M
1, M
2, M
3, M
4... M
n;
4) calculate point of scintillation ratio value K according to described matrix data, described point of scintillation ratio value K is the ratio of noise number and pixel number,
U=(M
2-M
1)+(M
4-M
3)+…(M
n-M
n-1)
K=(not being the number of the element of 0 in the matrix U)/number of whole element (in the matrix U);
5) the V-COM value of described point of scintillation ratio value K and correspondence is write in the storage unit of flush bonding processor;
6) read the minimum K value in flush bonding processor storage unit, and the V-COM value of correspondence is written in the storer of liquid crystal module V-COM chip, complete adjustment.
Preferably, the step of writing V-COM value according to the effective range of V-COM successively by order from small to large to the V-COM chip of liquid crystal module in described step 2 comprises:
Described flush bonding processor automatically writes V-COM value according to the effective range of V-COM successively by order from small to large in the V-COM chip of liquid crystal module.
Preferably, several picture steps of industrial digital collected by camera described in described step 2 comprise:
The Panel of the alignment lens liquid crystal module of described industrial digital camera is held viewing area continuous acquisition 8 ~ 50 frame picture.
Preferably, in described step 2, the effective range of V-COM is 0 ~ 255.
Compared with prior art, usefulness of the present invention is: 1, matrixing after a picture group sheet is carried out plus and minus calculation, draw the point of scintillation of liquid crystal module Panel viewing area, and calculated amount is larger than single photoelectric sensor, makes the adjustment of Flicker value more accurate.2, because industrial digital camera carries out image acquisition to the whole viewing area of liquid crystal module Panel, the point of scintillation ratio value K obtained characterizes the display performance of whole viewing area.3, due to the comparative maturity of machine vision mechanism kinematic control technology development, it is more full-automatic than the Flicker adjustment being easier to realize liquid crystal module production line to adopt the present invention.
Accompanying drawing explanation
Fig. 1 process flow diagram of the present invention;
Fig. 2 realizes the structural representation of device of the present invention;
In figure: 1. liquid crystal module, 1-1. liquid crystal panel, 1-2.V-COM chip, 2. industrial digital camera, 3. flush bonding processor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of liquid crystal module Auto-Flicker Self-regulation track method based on machine vision provided by the present invention, comprises the steps:
1) open industrial digital camera 2 and flush bonding processor 3, it is synchronous unlatching industrial digital camera 2 and the refresh rate of liquid crystal module 1 to be carried out frame per second;
2) flush bonding processor 3 successively automatically writes V-COM value according to the effective range of V-COM by order from small to large at the V-COM chip 1-1 of liquid crystal module 1, and often during a write V-COM value, industrial digital camera 2 gathers n frame picture, n be greater than 1 even number; N value is larger, and adjustment is more accurate.
The step gathering picture comprises: the Panel of the alignment lens liquid crystal module 1 of described industrial digital camera 2 is held 1-1 viewing area continuous acquisition 8 ~ 50 frame picture.
3) carry out matrixing process to the n frame picture under each V-COM value, obtain matrix data, such as 12 frame pictures can obtain matrix data M
1, M
2, M
3, M
4... M
12; The matrixing process of picture is adopted to the method for traditional image procossing.
4) calculate point of scintillation ratio value K according to matrix data, point of scintillation ratio value K is the ratio of noise number and pixel number,
U=(M
2-M
1)+(M
4-M
3)+(M
6-M
5)+(M
8-M
7)+(M
10-M
9)+(M
12-M
11)
K=(not being the number of the element of 0 in the matrix U)/number of whole element (in the matrix U);
5) the V-COM value of point of scintillation ratio value K and correspondence is write in the storage unit of flush bonding processor 3;
6) read the minimum K value in flush bonding processor 3 storage unit, and the V-COM value of correspondence is written in the storer of liquid crystal module 1V-COM chip 1-2, complete adjustment.
Realize device of the present invention as shown in Figure 2, the output terminal of industrial digital camera 2 is connected with the input end of flush bonding processor 3, and the output terminal of flush bonding processor 3 is connected with the input end of liquid crystal module 1.Industrial digital camera 2 is for holding 1-1 viewing area gather picture and send flush bonding processor 3 to from the Panel of liquid crystal module 1; Flush bonding processor 3 obtains matrix data for carrying out matrixing process to picture, and obtains V-COM value by after matrix data process, then by the V-COM chip 1-2 of V-COM value write liquid crystal module 1; Liquid crystal module 1, for holding 1-1 viewing area display Flicker test pictures at Panel, obtains V-COM value in V-COM chip 1-2.Flush bonding processor 3 adopts the V-COM chip 1-2 of I2C bus and liquid crystal module 1 to carry out communication, by revising the value (0-255) of V-COM thus the magnitude of voltage regulating it to export.
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 design some improvement, and these improvement also should be considered as protection scope of the present invention.
Claims (4)
1., based on a liquid crystal module Auto-Flicker Self-regulation track method for machine vision, it is characterized in that comprising the steps:
1) industrial digital camera (2) and flush bonding processor (3) is opened;
2) V-COM value is successively write according to the effective range of V-COM by order from small to large to the V-COM chip (1-2) of liquid crystal module (1), when often writing a V-COM value, described industrial digital camera (2) gathers n frame picture, n be greater than 1 even number;
3) matrixing process is carried out to the n frame picture under each V-COM value, obtain matrix data M
1, M
2, M
3, M
4... M
n;
4) calculate point of scintillation ratio value K according to described matrix data, described point of scintillation ratio value K is the ratio of noise number and pixel number,
U＝(M
2-M
1)+(M
4-M
3)+…(M
n-M
n-1)
K=(not being the number of the element of 0 in the matrix U)/number of whole element (in the matrix U);
5) the V-COM value of described point of scintillation ratio value K and correspondence is write in the storage unit of flush bonding processor (3);
6) read the minimum K value in flush bonding processor (3) storage unit, and the V-COM value of correspondence is written in the storer of liquid crystal module (1) V-COM chip (1-2), complete adjustment.
2. the liquid crystal module Auto-Flicker Self-regulation track method based on machine vision according to claim 1, is characterized in that: described step 2) in write V-COM value according to the effective range of V-COM successively by order from small to large to the V-COM chip (1-2) of liquid crystal module (1) step comprise:
Described flush bonding processor (3) automatically writes V-COM value according to the effective range of V-COM successively by order from small to large in the V-COM chip (1-2) of liquid crystal module (1).
3. the liquid crystal module Auto-Flicker Self-regulation track method based on machine vision according to claim 1, is characterized in that: described step 2) described in industrial digital camera (2) gather n frame picture step and comprise:
The Panel of the alignment lens liquid crystal module (1) of described industrial digital camera (2) is held (1-1) viewing area continuous acquisition 8 ~ 50 frame picture.
4. the liquid crystal module Auto-Flicker Self-regulation track method based on machine vision according to claim 1, is characterized in that: described step 2) in the effective range of V-COM be 0 ~ 255.
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| CN104090399A (en) * | 2014-07-23 | 2014-10-08 | 无锡博一光电科技有限公司 | Liquid crystal display screen flicker automatic burning method |
| CN104181719B (en) * | 2014-09-17 | 2016-11-09 | 深圳市华星光电技术有限公司 | The method of adjustable liquid crystal display panel scintillation |
| CN104464664B (en) * | 2014-11-21 | 2016-08-17 | 深圳市立德通讯器材有限公司 | A kind of method of automatic opaquing fluid crystal display screen Flicker |
| CN104732943B (en) * | 2015-04-08 | 2017-03-29 | 京东方科技集团股份有限公司 | Common electric voltage control method and adjusting means, display device |
| CN107450208A (en) * | 2017-09-27 | 2017-12-08 | 重庆中显智能科技有限公司 | A kind of MIPI liquid crystal modules OTP method for burn-recording |
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| CN101261375A (en) * | 2008-04-29 | 2008-09-10 | 达辉(上海)电子有限公司 | Adjustment and calibration device and method |
| CN101739978A (en) * | 2009-11-27 | 2010-06-16 | 深圳创维－Rgb电子有限公司 | Device for automatically calibrating liquid crystal VCOM voltage value and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09168128A (en) * | 1995-12-18 | 1997-06-24 | Sharp Corp | Common electrode potential adjustment device for liquid crystal television receiver |
| JPH10333184A (en) * | 1997-06-04 | 1998-12-18 | Advanced Display:Kk | Method and device for adjusting liquid crystal display device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261375A (en) * | 2008-04-29 | 2008-09-10 | 达辉(上海)电子有限公司 | Adjustment and calibration device and method |
| CN101739978A (en) * | 2009-11-27 | 2010-06-16 | 深圳创维－Rgb电子有限公司 | Device for automatically calibrating liquid crystal VCOM voltage value and method thereof |
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