Optical film

Abstract

The present invention provides an optical film comprising a base layer, a reflective layer disposed on one surface of the base layer, and a light-resistant layer disposed on the reflective layer. According to the optical film, after the light rays projected by the projection are received, the reflective layer reflects the projection light rays, the light-resistant layer can absorb ambient light, and the light-resistant layer structures are randomly and uniformly distributed on the reflective layer, so that the image gain is high, the brightness is uniform, the image contrast ratio is improved,the color rendition is good, the manufacturing process of the optical film is simple, and the manufacturing cost is low.

Description

Technical field [0001] The invention relates to an optical film. Background technique [0002] As the pace of social work accelerates, work meetings are frequent and random, and a large number of miniature meeting rooms have emerged, and the brightness of the lights in the meeting rooms is generally not suitable for the projection of existing ordinary screens. The optical structure of the existing front projection optical screen generally includes projection paint and projection filter film. This structure not only makes the picture quality low, the definition is not good, but also the brightness uniformity, overall contrast and resistance to ambient light, etc. There are technical difficulties. For example, the ordinary projection white screen does not selectively reflect the light, which causes the ambient light and the projector's light to be mixed together, which makes the projection screen white and the colors are distorted. It is not realistic to have a meeting with the li...

AI Technical Summary

Problems solved by technology

The optical structure of the existing front projection optical screen generally includes projection paint and projection filter film. technical problems

For example, the ordinary projection white screen does not selectively reflect the light, which causes the ambient light and the light of the projector to mix together, so that the projection screen becomes white and the color is distorted. It is not realistic to hold a meeting with the lights off, because in a dim environment It is not conducive to the participants to take notes, etc. Looking at the screen in a dark environment will increase the damage to people's eyes. Moreover, the dark environment will also have negative emotions on the participants, which will directly affect the decision-making ability of the participants, making the meeting difficult. Although some existing optical films (black grid screens) can resist ambient light, their gain is too low, only about half of that of ordinary glass fiber screens. To achieve proper brightness and clarity, high lumens must be used. Projector, this will increase the cost of using the projector, and the triangular grating of the black grid screen needs to control the size and cycle consistency of each grating during the manufacturing process, and it is also necessary to accurately arrange the reflective layer. There will be no black and white uneven stripes, which makes the manufacturing equipment precision very high, which makes the manufacturing cost very high

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