Structure of small-sized refraction astigmatism lens and backlight module

Abstract

The invention discloses a structure of a small-sized refraction astigmatism lens and a backlight module. The structure of the small-sized refraction astigmatism lens is an axisymmetric structure relative to the center normal of the lens. The structure comprises a first refraction surface which is arranged on the upper surface of the lens, a second refraction surface which is arranged on the bottomsurface of the lens, a first diffuse reflection surface which is arranged on the side surface of the lens, and a second diffuse reflection surface which is arranged on the bottom surface of the lens;the first diffuse reflection surface is connected with the first refraction surface and the second diffuse reflection surface respectively; the second diffuse reflection surface is further connectedwith the second refraction surface. An astigmatism structure is adopted for the lens, the half-light-intensity angle, of 120 degrees, which is given out by an LED can be diffused to the half-light-intensity angle of 162 degrees, so that the light mixing distance of the LED backlight module is further reduced, and accordingly the thickness of the backlight module is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of liquid crystal display backlight modules, and in particular to a structure of a miniaturized refraction astigmatism lens and a backlight module. Background technique [0002] A liquid crystal display (LCD, Liquid Crystal Display) has many advantages such as light weight, thin body, power saving, etc., and thus has been widely used. The backlight of traditional liquid crystal display devices adopts cold cathode ray tube (CCFL). At present, LED light source has become a new type of replacement for cold cathode ray tube (CCFL) because of its advantages such as uniform distribution of illuminants, longer life, and better environmental protection. Backlight source. [0003] At present, ultra-thinning is the development trend of liquid crystal display devices. At present, the refracting backlight lens adopts a larger size and volume to realize the light scattering function, which has the ...

AI Technical Summary

Problems solved by technology

[0003] At present, ultra-thinning is the development trend of liquid crystal display devices. At present, the refracting backlight lens adopts a larger size and volume to realize the light scattering function, and there are problems of using more injection molding materials, higher mold costs, and longer injection molding cycles.

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