Method for unifying white field coordinates of liquid crystal display

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 [0001] The invention relates to a debugging method for uniform white field coordinates in liquid crystal display production, belonging to the field of liquid crystal display manufacturing. Background technique [0002] Existing liquid crystal displays usually only consider the brightness and contrast requirements when designing and producing, but ignore the influence of color coordinates on display quality, so that the white field screen of the liquid crystal display produced in this way will appear yellowish or bluish, which is not a problem. true white. With the development of the times, people put forward higher and higher requirements for the display quality of liquid crystal displays, not only to meet the brightness requirements, but also to achieve the consistency of white field coordinates: (u',v')=(0.198±0.005 , 0.468±0.005), the existing implementation method is to use white LED testing equipment to detect the color coordinates of white LEDs, and to...

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Problems solved by technology

[0003] In view of the defects in the above-mentioned prior art, the purpose of the present invention is to propose a method for unifying the coordinates of the white field of a liquid crystal display to solve the problem of color cast in the white field picture displayed by a liquid crystal display

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