Optical prism sheet for backlight module

Abstract

The invention relates to the field of liquid crystal displays, and provides an optical prism sheet for a backlight module. The optical prism sheet comprises a base material layer, a light condensing layer and an anti-scratching layer, wherein the base material layer is made of a light-transmitting material; the light condensing layer is formed on the upper side of the base material layer and comprises a plurality of structured graphs at predetermined intervals; and the anti-scratching layer is on the lower side of the base material layer and forms a thickness of 0.1 to 3mu m by using a nanoparticle-containing ultraviolet curing adhesive. The scratch resistance of the lower side of the prism sheet is improved and the rigidity, distortion resistance and bend resistance of the improved prismsheet for the backlight module are improved by coating the nanoparticle-containing curing adhesive on the lower side of the base material layer with the structured graphs.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to an optical prism sheet used in a backlight module. Background technique [0002] In general, in order to improve the back surface of liquid crystal display devices (Liquid Crystal Display, LCD) including not only electronic light-emitting panels, notebook computer monitors, word processors, desktop computer monitors, TVs, video cameras, but also automotive and aircraft displays, etc. To illuminate the brightness of flat panel displays, backlight modules of various structures are used. The backlight module includes a light source, a light guide plate, and multiple optical sheets. The light from the light source passes through the light guide plate and multiple optical sheets and then exits to the display. [0003] figure 1 It is a schematic diagram of an existing backlight module. Such as figure 1 As shown, the backlight module includes: a light source 4; a light guide pl...

AI Technical Summary

Problems solved by technology

[0014] However, usually in the backlight system, the prism sheet for optics, which plays a role in improving brightness, is exposed to severe scratches and static electricity on the structured pattern surface of the prism and the underside of the substrate layer during its manufacturing process, so , on the lower side of the substrate layer of the prism sheet, damage caused by foreign matter mixing frequently occurs, reducing production yield

[0015] In addition, due to the formation of structured graphics on the upper side of the prism sheet, and the thickness of the substrate layer becomes thinner, in the production process of the prism sheet 7, it is necessary to add a protective film or protective layer on the lower side of the prism sheet 7 to prevent the prism Sheet 7 is scratched during production, transportation and assembly, and the protective layer or protective film needs to be removed after assembly. Removing the protective film or protective layer will cause distortion or curl (curl) phenomenon of the prism sheet, increasing scratches during assembly and workload, and frequent occurrence of assembly errors due to removal of the protective film and prism sheet, urgently need improvement countermeasures

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