High brightness diffusion film for laptop and manufacturing method thereof

Abstract

The invention provides a transparent film, which is provided with a smooth curved surface and a bottom surface under the curved surface, and the protrusion height of the curved surface is approximate to 0.15 to 0.4 times curvature radium of the bottom surface. The invention also provides a method for manufacturing the transparent film, which comprises the following steps: providing the bottom surface; measuring the curvature radium of the bottom surface; forming a protrusion plane on the bottom surface based on a ratio of the curvature radium to the protrusion height of the smooth curved surface; and coating liquid cement on the protrusion plane. By adopting the high brightness transparent film and the manufacturing method thereof, back-and-forth scattering of light among diffusion particles can be reduced, and the curved surface of the diffusion film can adjust an emergent angle of a light guide plate to the vicinity of the optimal incident angle of a cross-type bright enhancement film. Besides, the film also can effectively improve utilization rate of luminous energy of the light guide plate, and improve the brightness or save energy.

Description

technical field [0001] The invention relates to a backlight unit in a liquid crystal display and a liquid crystal television, in particular to a structure of a high-brightness diffusion film in the backlight unit and a manufacturing method thereof. Background technique [0002] In the field of LCD monitors and LCD TVs, enhancement films are usually used to increase the brightness of the backlight unit. Here, the enhancement film can also be called a prism film, which uses a special prism structure principle to concentrate the originally scattered light to a range of about 70 degrees to increase the brightness of the central viewing angle. Usually, the light-concentrating high-brightness diffusion film or multi-layer film is used in the structure of a single light-enhancing film, which can increase the luminance by 3-5%. [0003] However, when this high-brightness diffusion film or multilayer film is applied to the cross-type brightness enhancement film of a notebook compute...

AI Technical Summary

Problems solved by technology

[0003] However, when this high-brightness diffusion film or multilayer film is applied to the cross-type brightness enhancement film of a notebook computer, the distribution of the multilayer stack easily causes the light source to scatter back and forth among the diffusion particles, which greatly reduces the brightness of the backlight unit. , at the same time, the light energy is circulated between the cross-type light-enhancing films, which also makes the light energy utilization rate less

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