Light Diffusion Module and a Back Light Module Using the Same
First Claim
1. A light diffusion module for use with a back light module, comprising:
- a first diffusion layer including a bottom light entrance surface and a top light exit surface, wherein said top light exit surface has a plurality of first micro structures juxtapositioned to each other, at least a part of said first micro structures have a first height; and
a second diffusion layer disposed above said first diffusion layer, including a bottom surface and a top surface, wherein said bottom surface is disposed opposite to said top light exit surface of said first diffusion layer, said top surface has a plurality of second micro structures juxtapositioned to each other, at least a part of said second micro structure have a second height;
wherein a ratio of said first height to said second height is between 0.8 and 1.5.
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Accused Products
Abstract
A light diffusion module and a back light module using the same. The light diffusion module is disposed corresponding to the light source module of the back light module. The light diffusion module includes a first diffusion layer and the second diffusion layer. The first diffusion layer is disposed on top of the light source module and the top light exit surface has a plurality of first micro structures juxtapositioned to each other. The second diffusion layer is disposed on top of the first diffusion layer, and the top surface has a plurality of second micro structures juxtapositioned to each other. The ratio of the width of each first micro structure to the width of each second micro structure is between 1.1 and 1.8. The ratio of the height of each first micro structure to the height of each second micro structure is between 0.8 and 1.5.
42 Citations
37 Claims
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1. A light diffusion module for use with a back light module, comprising:
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a first diffusion layer including a bottom light entrance surface and a top light exit surface, wherein said top light exit surface has a plurality of first micro structures juxtapositioned to each other, at least a part of said first micro structures have a first height; and a second diffusion layer disposed above said first diffusion layer, including a bottom surface and a top surface, wherein said bottom surface is disposed opposite to said top light exit surface of said first diffusion layer, said top surface has a plurality of second micro structures juxtapositioned to each other, at least a part of said second micro structure have a second height; wherein a ratio of said first height to said second height is between 0.8 and 1.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A manufacturing method of a light diffusion module for use with a back light module, comprising:
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disposing a first diffusion layer on the back light module, wherein the first diffusion layer includes a bottom light entrance surface and a top light exit surface, the first diffusion layer has a plurality of first micro structures juxtapositioned to each other, and at least a part of the first micro structures have a first width and a first height; disposing a second diffusion layer on the first diffusion layer, wherein the second diffusion layer includes a bottom surface and a top surface, the bottom surface is disposed in opposition to the top light exit surface of the first diffusion layer, the top surface has a plurality of second micro structures juxtapositioned to each other, and at least a part of the second micro structure have a second width and a second height; and adjusting a ratio of the first height to the second height between 0.8 and 1.5. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification