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 and a second surface. The first surface is opposite to the second surface. A plurality of micro-depressions are defined in the first surface. A plurality of elongated arc-shaped protrusions are formed on the second surface. Each micro-depression is defined by four connecting sidewalls. A transverse width of each sidewall of each micro-depression progressively decreases with increasing distance from the second surface. A backlight module using the present prism sheet is also provided.
Claims20
A prism sheet for a backlight module within a liquid crystal display device comprising
- a transparent main body within the backlight module having:
- a first surface,
- a second surface opposite to the first surface,
- a plurality of micro-depressions defined in the first surface, and a plurality of elongated arc-shaped protrusions formed on the second surface, wherein each of the micro-depressions is defined by four connecting sidewalls, wherein a transverse width of each sidewall progressively decreases with increasing distance from the first surface.
A backlight module within a liquid crystal display device comprising:
- a plurality of lamps within the backlight module;
- a light diffusion plate positioned above the lamps;
- and
- a prism sheet positioned on the light diffusion plate, the prism sheet including a transparent main body having
- a first surface,
- a second surface opposite to the first surface, and
- a plurality of micro-depressions defined in the first surface, and a plurality of elongated arc-shaped protrusions formed on the second surface, wherein each of the micro-depression is defined by four connecting sidewalls, wherein a transverse width of each sidewall progressively decreases with increasing distance from the first surface.
Dependencies are inferred from the claim text.