High brightness diffusion film for laptop and manufacturing method thereof

A notebook computer, protruding height technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of back and forth scattering of light sources, low light energy utilization rate, and reduce the brightness of backlight units, so as to reduce back and forth scattering and improve light The effect of improving utilization rate and brightness

Inactive Publication Date: 2010-05-19
AU OPTRONICS CORP
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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

Method used

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  • High brightness diffusion film for laptop and manufacturing method thereof
  • High brightness diffusion film for laptop and manufacturing method thereof
  • High brightness diffusion film for laptop and manufacturing method thereof

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] figure 1 A schematic diagram of the structure of particle size-dispersed diffusion particles in the prior art is shown. When the lower diffusion film is used in the backlight unit of a notebook computer, due to the distribution form of the multi-layer stack, the lower diffusion film cannot control the height of the particles protruding from the glue plane at all. Therefore, the light source is easy to scatter inside, resulting in loss of light energy.

[0032] figure 2 show figure 1 Schematic representation of the size-dispersed diffusing particles shown under a scanning electron microscope. Similarly, image 3 A schematic diagram showing particles under a scanning electron microscope after using a high-brightness diffuser film in a backlight unit of an LCD TV, and Figure 4 Schematic showing particles under ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335
Inventor 林义文郗任远
Owner AU OPTRONICS CORP
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