High-brightness and wide-color-gamut direct type backlight module and liquid crystal display applying module

A technology of backlight module and wide color gamut, applied in the field of liquid crystal display module, can solve the problems of difficult color control of multi-color LED backlight, difficult to implement by small manufacturers, large light mixing distance of full-color direct-lit backlight, etc., and achieve excellent display quality. and optical taste, reduce light mixing distance, improve the effect of light mixing defects

CN103629603AInactive Publication Date: 2014-03-12中航华东光电有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-03-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a high-brightness and wide-color-gamut direct type backlight module and a liquid crystal display applying the module. The high-brightness and wide-color-gamut direct type backlight module comprises an optical membrane set, a backlight lamp plate, and a plurality of colored lamps and white lamps which are arranged on the backlight lamp plate and are mixed and matched; the optical membrane set sequentially comprises a polarization type brightness enhancing membrane, a brightness enhancing membrane and a diffusion membrane from top to bottom; the backlight lamp plate is located below the optical membrane set; the ratio of a light mixing distance of the colored lamps and the white lamps to the distance between the lamps of the same type is (1.1-1.2) to 1; and the light mixing distance is the distance from the upper surface of each lamp to the lower surface of the diffusion membrane. According to the high-brightness and wide-color-gamut direct type backlight module, an optimal RGB (Red, Green and Blue) lamp for improving a color gamut of the liquid crystal display is obtained; a light mixing defect of the full colored lamps is improved by applying a method of mixing and matching the colored lamps and the white lamps; and meanwhile, the light mixing distance is reduced. Backlight is optimized so that the excellent display quality and optical taste of a liquid crystal module are realized under the condition of keeping the high brightness and the wide color gamut, and the thickness of a full-colored-lamp direct type backlight cavity is reduced.
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Description

technical field

[0001] The invention relates to a liquid crystal display module, in particular to a direct-lit backlight module with high brightness and wide color gamut and a liquid crystal display using the module. Background technique

[0002] A typical liquid crystal display module consists of a backlight and a liquid crystal screen, and the liquid crystal screen in front of the backlight contains pixels whose transmittance can be changed. The backlight illuminates it from behind the LCD screen. The transmittance of a pixel can be reduced until the pixel is completely black, or it can be increased until the pixel is brightest. By providing appropriate driving signals to the pixels, resulting in the desired bright and dark areas, so that the image can be displayed on the liquid crystal display module.

[0003] In a typical color LCD module, each pixel consists of individually controllable red, green and blue cells. Each unit contains a filter that transmits the corresp...

Examples

Embodiment 1

[0039] This example Figure 6 as shown, Figure 6 It is a schematic diagram of the layout of the direct-lit backlight panel 2 with full colored lights, and the circles represent colored lights.

[0040] Taking the 10.4-inch backlight panel 2 as an example, the package size of the lamp is 3.5mm×2.8mm×2.0mm, and the half-brightness angle of the lamp is 60°. The lamp spacing a is 10mm.

[0041] Figure 11 It is a schematic diagram of a backlight chamber using a backlight module of the present invention, wherein the optical film set 1 is a polarized brightness enhancement film, a brightness enhancement film and a diffusion film from top to bottom, and the backlight plate 2 is located under the optical film set 1 . The polarized brightness enhancement film is DBEF-D400 of 3M Company, the brightness enhancement film is BEFⅢ90 / 50-10T of 3M Company, the haze of the diffusion film is 96%, and the primary total light transmittance is 55%. Less than or equal to 5°) transmittance is 2...

Embodiment 2

[0043] This example Figure 7 as shown, Figure 7 It is a schematic diagram of the layout of the direct-lit backlight panel 2 with all white lights, where the squares represent white lights.

[0044] Other implementations are the same as in Example 1.

Embodiment 3

[0046] This example Figure 8 As shown, the circle represents colored lights, and the square represents white lights. Other implementations are the same as in Example 1.