Optical film and manufacturing method thereof

Abstract

The invention relates to an optical film and a manufacturing method thereof, which comprises a light-permeable base material, a plurality of diffusion micro-particles distributed on the base material and a light collection layer arranged on the surface of the base material. Part of the diffusion micro-particles lead at least one surface of the base material to form bulges, and the protrusive height of part of the bulges is larger than or equal to 0.5 mu m. The manufacturing method of the optical film mainly comprises the following steps: heating the base material for leading the base material to be in molten state, adding the diffusion micro-particles on the surface of the base material, curing the base material for forming the base material, and finally forming the light collection layer on the surface of the base material. The optical film only contains the double-layer structure of the base material and the light collection layer, and can still achieve the effects of light collection and light diffusion atomization while reducing the number of film layers, so that the manufacturing method has the advantages of easy manufacture and reduced cost.

Description

technical field [0001] The invention relates to an optical film and a manufacturing method thereof, in particular to an optical film which is applied to a display and has both light collection and light diffusion and atomization functions and a manufacturing method thereof. Background technique [0002] Both the brightness enhancement film and the diffusion film are important components in a liquid crystal display (LCD). The brightness enhancement film is used to make the light emitted in a relatively concentrated manner, and concentrated in the range of the user's viewing angle, so as to increase the brightness of the LCD. On the other hand, since there are multiple layers of optical films stacked in the module, the optical interference between the films is likely to produce Newton-rings (Newton-ring), or the film itself will have optical defects such as rainbow lines, so it must be passed The light diffusion and atomization effect of the diffusion film prevents the above-m...

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Problems solved by technology

[0005] Since forming each film layer must go through the film curing process, the process time of the above-mentioned optical film is long and the efficiency is slow, resulting in the lack of production capacity and high manufacturing cost.

Moreover, the light-collecting layer and the base material are made of different materials, and the base material and the diffusion layer are also made of different materials. The combination of layers of different materials must also consider the stability of the combination, so the number of layers of the optical film increases. It will be more difficult to manufacture for a long time, so its manufacturing process is more difficult. If there is any defect in the manufacturing process, it may cause the various layers of the optical film to be unable to be firmly combined

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