Optical membrane

Abstract

The invention provides an optical membrane. The membrane comprises a transmission basal plate, a plurality of strip bumps and a plurality of bump structures, wherein the transmission basal plate is provided with a first surface and a second surface which are oppositely arranged; the strip bumps are arranged on the first surface, each strip bump is provided with two strip lateral faces; the bump structures are arranged on ridges of the strip bumps, each bump structure is provided with a raised end and two wing parts; the raised end is protruded from the ridge of corresponding strip bump; the two wing parts are respectively positioned on the two strip lateral faces of the corresponding strip bump, each wing part extends from the raised end to the position between the ridge and a valley line; the length of the bump structure in the direction parallel to the extending direction of the ridge is L, and the width of the bump structure in the direction vertical to the ridge is W, and L / W is more than or equal to 1.2. By the optical membrane, at least one of veins, local adhesion, scrape and abrasion of the optical membrane with other optical elements can be effectively improved.

Description

【Technical field】 [0001] The invention relates to an optical film. 【Background technique】 [0002] With the progress of the optoelectronic industry, the requirements for the light shape provided by the light source module are gradually increasing. At this time, a variety of optical films have been developed to meet the various needs of the light shape. These optical films include diffusion sheets, brightness enhancement films (BEF), such as prism sheets, lens arrays, etc. Among them, the prism sheet used as the enhancement film uses the light-emitting facets of several cylindrical prisms to select the light rays with different incident directions. Generally speaking, light incident on the bottom of the lenticular prism at an angle of about 60 degrees will be refracted by the lenticular prism to pass through the prism, and exit in a direction roughly perpendicular to the bottom of the lenticular prism. In addition, light that is too large or too small to be 60 degrees will...

AI Technical Summary

Problems solved by technology

[0004] However, the crest line on the top of the columnar prism and the valley lines formed between two adjacent columnar prisms are very obvious and arranged at regular intervals, so it is easy to match the display on the prism sheet or the enhancement film. Panels (such as liquid crystal display panels) form moire, which affects the display quality of the display panel

In addition, the sharp corners formed by the cylindrical prisms at the ridges and the adjacent optical elements are also prone to wear or scratches

Furthermore, since the heights of each columnar prism are the same, the prism sheet is prone to local adhesion to the adjacent optical film, resulting in local abnormalities in the display screen.

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