Light guide strip for liquid crystal display

Abstract

The invention relates to the technical field of light guide strips, in particular to a light guide strip for a liquid crystal display. The light guide strip is characterized by comprising the light guide strip body, wherein the light guide strip body is defined by an incident surface, an emergent surface and reflecting surfaces; the incident surface, the emergency surface and the reflecting surfaces are spliced together to form included angles; each reflecting surface is a free curved surface; the length of the emergent surface of the light guide strip body is the same as that of the incident surface of the light guide strip body, and the emergent surface of the light guide strip body is narrower than the incident surface of the light guide strip body; microstructures facilitating the convergence of LED light are formed on the incident surface and the emergent surface. Through the adoption of the structure, light paths from an LED into the light guide plate are changed, and the light emitted by the LED firstly passes through the light guide strip body and then is emerged to the incident surface of the light guide plate from the light guide strip body; the light emerged from the light guide strip body has higher convergence than that directly emerged from the LED, so that the light guide plate is thinner than the LED, the ultra-thin design of the liquid crystal display is realized, materials are reduced, the cost is reduced, and the light loss in the light guide plate is reduced; both the light convergence and the light homogeneity can be improved.

Description

technical field [0001] The present invention relates to the technical field of light guide bars, in particular to a light guide bar of an LED backlight. Background technique [0002] In recent years, liquid crystal display devices have gradually occupied the mainstream of display products due to their advantages of being light and thin, occupying little space, and low radiation, and gradually replaced traditional cathode ray tube display devices. Liquid crystals are not active light-emitting displays and require a backlight to provide light energy for them. Compared with LCDs using CCFLs as backlights, LCDs using LEDs as backlights have the advantages of being more efficient, thinner, and more environmentally friendly. The LED backlight module is a component that provides a uniform light source for the liquid crystal display. According to the arrangement position of the LEDs, the backlight can be divided into two types: side-in type and direct-type type. [0003] The LEDs...

AI Technical Summary

Problems solved by technology

However, in order to collect the light emitted by the LED as much as possible and improve the utilization rate of the LED light, the light guide plate in the side-type liquid crystal display must be thicker than the light-emitting surface of the LED, so the thickness of the backlight module cannot be fully achieved. Ultra-thin design

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