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US 7,744,245 B2Granted
Prism sheet and backlight module using the same
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsTung-Ming Hsu, Shao-Han Chang
Life of this patent
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Abstract
An exemplary prism sheet includes a transparent main body. The main body includes a first surface, a second surface and a plurality of conical frustum micro-depressions and a plurality of triangular pyramidal micro-depressions. The first surface and the second surface are on opposite sides of the main body. The conical frustum micro-depressions are formed in the first surface and the triangular pyramidal micro-depressions are formed in the second surfaces. A backlight module using the present prism sheet is also provided.
Claims6
A backlight module comprising:
- a plurality of lamps;
- a light diffusion plate disposed above the lamps;
- and
- a prism sheet disposed on the light diffusion plate, the prism sheet includes a transparent main body having
- a first surface,
- a second surface opposite to the first surface, and
- a plurality of conical frustum micro-depressions formed in the first surface, and
- a plurality of triangular pyramidal micro-depressions formed in the second surface, wherein the triangular pyramidal micro-depressions are formed arranged on the second surface side by side, and each of the triangular pyramidal micro-depressions is surrounded by three adjacent triangular pyramidal micro-depressions.
5 more elements
Dependencies are inferred from the claim text.