Light guide device and a backlight module using the same
First Claim
1. A light guide device, comprising:
- a main body, including;
a first incident surface;
a second opposite incident surface;
an emitting surface extending from the first incident surface to the second incident surface;
a reflecting surface opposite from the emitting surface; and
a plurality of first microstructures formed on the reflecting surface, each first microstructure extending parallel to the first and second incident surface, the first microstructures having a distribution density and a relative size, the distribution density and the relative size thereof progressively decreasing along directions from a center of the reflecting surface toward the first and second incident surfaces, respectively.
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Accused Products
Abstract
A light guide device includes a main body having a first incident surface, a second incident surface, an emitting surface, a reflecting surface and a plurality of first microstructures. The first incident surface is opposite to the second incident surface. The emitting surface extends from the first incident surface to the second incident surface. The reflecting surface is opposite to the emitting surface, and the plurality of first microstructures are formed on the reflecting surface and extend parallel to the first and second incident surface. A distribution density and relative size of the first microstructures progressively decrease along directions from a center of the reflecting surface toward the first and second incident surface, respectively. The present light guide device does not employ additional optical correcting elements and thus has a simple structure. A backlight module using the same light guide device is also provided.
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Citations
19 Claims
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1. A light guide device, comprising:
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a main body, including;
a first incident surface;
a second opposite incident surface;
an emitting surface extending from the first incident surface to the second incident surface;
a reflecting surface opposite from the emitting surface; and
a plurality of first microstructures formed on the reflecting surface, each first microstructure extending parallel to the first and second incident surface, the first microstructures having a distribution density and a relative size, the distribution density and the relative size thereof progressively decreasing along directions from a center of the reflecting surface toward the first and second incident surfaces, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A backlight module comprising:
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two spaced light sources, a light guide device interposed between the light sources, the light guide device having a main body including;
a first incident surface disposed adjacent one of the two light sources;
a second opposite incident surface disposed adjacent to the other light source;
an emitting surface extending from the first incident surface to the second incident surface;
a reflecting surface opposite from the emitting surface; and
a plurality of first microstructures formed on the reflecting surface, each first microstructure extending parallel to the first and second incident surface, the first microstructures having a distribution density and a relative size, the distribution density and the relative size thereof progressively decreasing along directions from a center of the reflecting surface toward the first and second incident surface, respectively. - View Dependent Claims (16, 17, 18, 19)
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Specification