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Backlight module and liquid crystal display device

A technology of liquid crystal display device and backlight module, which is applied in optics, nonlinear optics, instruments, etc., can solve the problems of color crosstalk of three primary colors, and the decrease of color purity of backlight.

Active Publication Date: 2017-11-07
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present application provides a backlight module and a liquid crystal display device to solve the problems of the color purity reduction of the backlight and the color crosstalk between the three primary color backlights

Method used

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  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device
  • Backlight module and liquid crystal display device

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Experimental program
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Embodiment Construction

[0025] Please refer to figure 2 , is a schematic diagram of the distribution of backlight light emitted by the backlight light source provided in this application. Depend on figure 2 It can be seen that the emission angle distribution range of the backlight light is very large, and the backlight light is emitted within ±90° centered on the center line of the backlight light source. It can be seen that the backlight light does not have a good collimation effect, and the backlight light with a large emission angle easily enters other quantum dot conversion units except the corresponding quantum dot conversion unit, resulting in a decrease in pixel color purity, and the backlight between the three primary colors The color crosstalk affects the display effect of the liquid crystal display.

[0026] see image 3 and Figure 4 , are respectively a structural schematic diagram of a backlight module provided in Embodiment 1 of the present application and a structural schematic d...

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Abstract

The invention provides two backlight modules and corresponding liquid crystal display devices. Each backlight module is internally provided with a light collimation structure. Each light collimation structure comprises a convergence turning component and a reflecting component arranged on the periphery of the convergence turning component, wherein the two opposite surfaces of the convergence turning component are provided with a convex surface and a reflecting surface respectively; the reflecting component comprises a paraboloid used for reflecting backlight. After being converged through the corresponding convex surface, backlight rays emitted by each backlight unit can be concentrated near the focal point of the corresponding paraboloid and can be transmitted to the corresponding reflecting component under the reflection effect of the corresponding reflecting surface. According to the collimation principle and the light path reversible principle of the paraboloids, the backlight rays emitted near the focal points of the paraboloids can be emitted at small emission angles after the reflection effect of the reflection components. The small-angle backlight can enter corresponding quantum dot units completely, and the problems that the color purity of backlight is reduced and color crosstalk between the three-primary-color backlight occurs are solved.

Description

technical field [0001] The present application relates to the field of liquid crystal display, in particular to a backlight module and a liquid crystal display device. Background technique [0002] A liquid crystal display usually includes a backlight module and a liquid crystal panel arranged in sequence. The liquid crystal panel is a passive light-emitting element, which does not emit light itself, and requires a backlight module to provide a backlight with sufficient brightness to realize the display function of the liquid crystal display device. [0003] figure 1 It is a schematic diagram of the structure of a liquid crystal display. like figure 1 As shown, the liquid crystal display includes a backlight module 10 and a liquid crystal panel 20 . The backlight module includes a plurality of LED blue backlight sources 11 evenly distributed, the liquid crystal panel 20 includes a liquid crystal layer 21 and a quantum dot color conversion layer 22, the liquid crystal lay...

Claims

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Application Information

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IPC IPC(8): G02F1/13357
CPCG02F1/133603G02F1/133605G02F1/133606
Inventor 李富琳宋志成刘卫东
Owner HISENSE VISUAL TECH CO LTD
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