CN104537988B - Liquid crystal display white field coordinate unification method - Google Patents
Liquid crystal display white field coordinate unification method Download PDFInfo
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- CN104537988B CN104537988B CN201410714038.5A CN201410714038A CN104537988B CN 104537988 B CN104537988 B CN 104537988B CN 201410714038 A CN201410714038 A CN 201410714038A CN 104537988 B CN104537988 B CN 104537988B
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Abstract
The invention discloses a liquid crystal display white field coordinate unification method. The method includes the steps that white light LEDs of different chromaticity coordinate Bins are selected for manufacturing a first test backlight board to be matched with a target liquid-crystal display unit; the white field brightness, the white field chromaticity coordinate, the three-primary-color color-field brightness and the three-primary-color color-field coordinate are measured; a chromaticity coordinate excursion relationship of color fields after the white light LEDs of the chromaticity coordinate Bins matched with the target liquid-crystal display unit is calculated; a standard RGB LED is selected for manufacturing a second test backlight board, and the three-primary-color color-field brightness and the three-primary-color color-field coordinate are measured with the same method; the color mixing principle is used, the RGB LED is added into the backlight board according to the offset for composition; and the white field chromaticity coordinate is detected, liquid crystal displays are manufactured in batch is the condition that (u', v')=(0.198+-0.005, 0.468+-0.005) is met. By means of the unification method, dependence on expensive detection devices is eliminated; partition reuse of the white light LEDs are achieved; the using rate of the white light LEDs is improved; the production cost is reduced; in addition, the method can be applied to the liquid crystal displays in different sizes and different backlight modes.
Description
Technical field
The present invention relates in a kind of production of liquid crystal displays white field coordinate unification adjustment method, belong to liquid crystal display
Device manufactures field.
Background technology
Existing liquid crystal display generally only accounts for brightness and contrast and requires when design produces, and ignores color and sit
The impact to display quality for the mark, the white field picture of the liquid crystal display so produced occurs that jaundice or blueing etc. are existing
As, and non-real white.With the development in epoch, people propose higher and higher wanting to the display quality of liquid crystal display
Ask, not only brightness requirement to be met, more will realize the uniformity of white field coordinate: (u ', v ')=(0.198 ± 0.005,0.468
± 0.005), existing implementation method is to detect the chromaticity coordinates of white light led using white light led testing equipment, is controlled by strict
The chromaticity coordinates of white light led is realizing the uniformity of liquid crystal display white field coordinate.This method needs high accuracy, expensive inspection
Measurement equipment, reduces the utilization rate of white light led simultaneously, causes a large amount of white light led cannot effectively use, increased into and produce into
This.
Content of the invention
A kind of in view of defect that above-mentioned prior art exists, the purpose of the present invention is to propose to liquid crystal display white field coordinate
Unification method, solves the problems, such as that liquid crystal display shows white field picture colour cast.
The above-mentioned purpose of the present invention, will be achieved including step by the following technical programs:, by different chromaticity coordinates bin
White light led be made as the first test backlight, by first test backlight coupling Object LC display unit, measurement coupling after
The white brightness of Object LC display unit, chromaticity coordinates and three primary colours colour field brightness, chromaticity coordinates, calculate the white of color coordinates bin
The color coordinate drift relation of each colour field after light led and the collocation of Object LC display unit；, standard rgb led is made as
Two test backlight, and mate Object LC display unit, after measurement coupling, the three primary colours colour field of Object LC display unit is bright
Degree and chromaticity coordinates, as with reference to backboard；, utilize blend of colors principle, the brightness according to liquid crystal display and chromaticity coordinates inclined
Shifting amount adds rgb led that side-play amount is compensated in the first test backlight；, by compensate after backlight and titer
Brilliant display unit composition finished product simultaneously measures, if white field coordinate satisfaction (u ', v ')=(0.198 ± 0.005,0.468 ±
0.005) then produce liquid crystal display in batches, otherwise return to step repeats debugging compensation.
Further, step measurement white field coordinate (u ', v ') in the unification period 1 ≠ (0.198 ± 0.005,
0.468 ± 0.005) number of repetition that, return to step debugging compensates is less than three times.
Remarkable result after technical solution of the present invention application implementation is: the method is entered to white field coordinate using rgb led
Row compensates, and overcomes the dependence to high testing equipment it is achieved that the subregion multiplexing of white light led, improves the utilization of white light led
Rate, reduces production cost, and implementation method can be applicable in different size and the liquid crystal display of different backlight form.
Brief description
Fig. 1 is the schematic flow sheet that the present invention is directed to liquid crystal display white field coordinate unification method.
Fig. 2 is the chromaticity coordinate figure of liquid crystal display cie 1976.
Fig. 3 is the chromaticity coordinate figure that white light led is mapped in liquid crystal display cie 1976.
Specific embodiment
Hereinafter just accompanying drawing in conjunction with the embodiments, is described in further detail to the specific embodiment of the present invention, so that the present invention
Technical scheme is more readily understood, grasps.
Present invention innovation proposes a kind of liquid crystal display white field coordinate unification method, according to blend of colors principle,
Using rgb led, white field coordinate is compensated, overcome conventional liquid crystal manufacture in backlight to testing equipment
Rely on the subregion multiplexing it is achieved that white light led, and flexibly arrange in pairs or groups with rgb led, improve the utilization rate of white light led, reduce
Production cost, improves the uniformity of liquid crystal display white field coordinate, improves display quality.
As shown in figure 1, combine diagram to understand how this creation is realized step by step:, by different chromaticity coordinates bin's
White light led is made as the first test backlight, by the first test backlight coupling Object LC display unit, mesh after measurement coupling
The white brightness of mark liquid crystal display, chromaticity coordinates and three primary colours colour field brightness, chromaticity coordinates, calculate the white light of color coordinates bin
The color coordinate drift relation of each colour field after led and the collocation of Object LC display unit.Here only need to be can achieve using luminance meter
The mensure of chromaticity coordinates, and the color coordinate drift of each colour field can intuitively be calculated, and be that those skilled in the art skillfully grasp,
Therefore this mensure is omitted with the concrete grammar calculating and is described in detail.
, then standard rgb led is made as the second test backlight, and mate Object LC display unit, measurement
The three primary colours colour field brightness of Object LC display unit and chromaticity coordinates after coupling, as with reference to backboard.
, utilize blend of colors principle, the brightness according to liquid crystal display and color coordinate drift amount in backlight plus
Enter rgb led side-play amount is compensated.By add particular color led mix colours so that white field coordinate meet (u ',
V ')=(0.198 ± 0.005,0.468 ± 0.005).
, backlight and standard liquid crystal display after compensating are formed finished product and measure, if white field coordinate
Meet above-mentioned requirements then to carry out producing liquid crystal display, otherwise return to step in batches by the first test backlight after this compensates
Repeat debugging to compensate.
Application this unification method of the present invention, can achieve step measurement white field in most cases in the period 1
Coordinate (u ', v ')=(0.198 ± 0.005,0.468 ± 0.005).And be difficult to reach it is difficult to avoid compensating for the first time in actual job
Situation to ideal effect occurs, therefore needs return to step to repeat debugging and compensate, measure white field coordinate (u ', v ') again, generally
In the case of above-mentioned repeat compensate number of times be less than three times.
In sum, the remarkable result after technical solution of the present invention application implementation is: the method utilizes rgb led to white
Field coordinate compensates, and overcomes the dependence to high testing equipment it is achieved that the subregion multiplexing of white light led, improves white light
The utilization rate of led, reduces production cost, and implementation method can be applicable to different size and the liquid crystal of different backlight form
Show in device.
In addition to the implementation, the present invention can also have other embodiment.All employing equivalents or equivalent transformation shape
The technical scheme becoming, all falls within scope of the present invention.
Claims (2)
1. liquid crystal display white field coordinate unification method is it is characterised in that include step:
, the white light led of different chromaticity coordinates bin is made as the first test backlight, by first test backlight coupling target liquid
Brilliant display unit, after measurement coupling, the white brightness of Object LC display unit, chromaticity coordinates and three primary colours colour field brightness, color are sat
The color coordinate drift relation of each colour field after mark, the white light led of calculating color coordinates bin and the collocation of Object LC display unit；
, standard rgb led is made as the second test backlight, and mate Object LC display unit, mesh after measurement coupling
The three primary colours colour field brightness of mark liquid crystal display and chromaticity coordinates, as with reference to backboard；
, utilize blend of colors principle, the brightness according to liquid crystal display and color coordinate drift amount test backlight first
Middle addition rgb led compensates to side-play amount；
, will compensate after backlight and standard liquid crystal display composition finished product and measure, if white field coordinate satisfaction
(u ', v ')=(0.198 ± 0.005,0.468 ± 0.005) then produces liquid crystal display in batches, and otherwise return to step repeats to adjust
Examination compensates.
2. according to claim 1 liquid crystal display white field coordinate unification method it is characterised in that: unification first week
Step measurement white field coordinate (u ', v ') ≠ (0.198 ± 0.005,0.468 ± 0.005) in phase, return to step debugging is mended
The number of repetition repaid is less than three times.
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| CN105844113B (en) * | 2016-04-21 | 2019-06-14 | 予众信息科技（上海）有限公司 | A kind of LED color mixes the automatic calculating method of bin |
| CN107830930B (en) * | 2017-10-17 | 2020-04-24 | 一汽-大众汽车有限公司 | Test method and test equipment for batch white backlight parts |
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| CN101339743B (en) * | 2004-11-19 | 2011-02-09 | 索尼株式会社 | Backlight device, method of driving backlight device and liquid crystal display apparatus |
| US20090267879A1 (en) * | 2006-10-27 | 2009-10-29 | Sharp Kabushiki Kaisha | Liquid crystal display device |
| CN101235944B (en) * | 2008-02-29 | 2010-12-01 | 上海广电光电子有限公司 | Display control method of LED backlight source |
| KR20100027895A (en) * | 2008-09-03 | 2010-03-11 | 엘지디스플레이 주식회사 | Liquid crystal display and control method thereof |
| CN102779498B (en) * | 2012-05-30 | 2015-01-07 | Tcl显示科技（惠州）有限公司 | Method and system for realizing white balance of liquid crystal display module |
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