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US 2006/0187675 A1Published application
Light-duide plate and backlight module
AssigneeChunghwa Picture Tubes, Ltd.
InventorsWei-Yang Tseng, Chu-Chi Ting, Tien-Lung Chiu, Wei-Yu Lo
Life of this patent
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Abstract
A light-guide plate comprising a light-guide board having a first refractive index and at least one light-guide part buried inside the light-guide board is provided. The light-guide part has a second refractive index larger than the first refractive index. The light-guide board and the light-guide part buried therein have different refractive indices so that the total reflection may occur for improving the light transmission efficiency in the light-guide plate.
Claims20
A light-guide plate, comprising:
- a light-guide board, having a first refractive index;
- and
- at least one light-guide part, buried inside the light-guide board, wherein the light-guide part has a second refractive index larger than the first refractive index.
A backlight module, comprising:
- a light-guide plate, comprising a light-guide board and at least one light-guide part buried inside the light-guide board, wherein the light-guide board has a first refractive index while the light-guide part has a second refractive index larger than the first refractive index;
- and
- a light source, arranged on a light-incident surface of the light-guide plate, and the light source is aligned to the light-guide part of the light-guide plate.
Dependencies are inferred from the claim text.