Prism piece and backlight mould

Abstract

The invention discloses a prism piece which comprises a main body part and multiple prisms positioned on the main body part, wherein the upper surface of the main body part is provided with a symmetrical shaft, the main body part is divided into a first region and a second region which are mutually symmetrical, and the prisms on the two regions are symmetrical relative to the symmetrical shaft; in the first region, each prism comprises a first side face approaching to the edge which is parallel to the symmetrical shaft in the first region and a second side face far from the edge; and in a section from the edge to the interior of the first region, an included angle formed by the first side face and the upper surface of the main body part is gradually increased. The prisms provided by the invention are arranged in an inclined structure, so that the spotlight effect of the prism piece at a center watching position region is improved; after the prism piece is applied to a backlight source, the whole performance index of the backlight source is improved, and thus, the brightness of a display on the center watching position is improved; an irregular structure of each prism is arranged, so that generation of Mohr grain; and a light guide plate is combined with an inverse edge eyeglass, and the surface of each prism is a horizontal plane, so that the abrasion of the prism piece is effectively prevented, and the assembly is convenient.

Description

technical field

[0001] The invention relates to the field of liquid crystal display backlight sources, in particular to a prism sheet and a backlight module. Background technique

[0002] In flat panel displays, liquid crystals are devices that do not emit light themselves. It uses a backlight to display light. The backlight is mainly divided into side-type backlight and direct-type backlight. Taking the side-type backlight as an example, it includes: a molded frame with a fixed effect; installed on the bottom surface to reflect light to the liquid crystal display A reflective sheet of the plate; a light guide plate arranged on the reflective sheet for guiding light; a light source arranged between the light guide plate and the side wall of the receiving space for emitting light; a diffuser sheet arranged on the light guide plate for uniform light; A prism sheet placed on the diffusion sheet for converging light; a protective sheet for protecting the diffusion sheet and th...

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