Hon Hai Precision Industry Co., Ltd.

Tsinghua University

Di Feng

Shou-Shan Fan

Guo-Fan Jin

Ying-Bai Yan

Xing-Peng Yang

Qiao-Feng Tan

Hai-Tao Liu

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.

Light guide device and a backlight module using the same

An exemplary light guide plate () includes: a light incident portion () for receiving a light; a light reflecting portion () for reflecting the light input through the light incident portion; and a light emitting portion () opposite to the light reflecting portion, for outputting the reflected light. The light incident portion includes a first diffractive optical element () located thereat. The first diffractive optical element includes a plurality of protrusions () each having a curved surface, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the first diffractive optical element. The light emitting portion may include a second diffractive optical element () located thereat. The second diffractive optical element includes a plurality of elongate protrusions, with the protrusions being arranged symmetrically opposite to each other across a central axis of symmetry of the second diffractive optical element.

Light guide plate and surface light source using same

A light guide device includes a main body and a plurality of parallel elongate first V-shaped microstructures. The main body has an incident surface; an emitting surface adjoining the incident surface; and a reflecting surface opposite to the emitting surface. The first V-shaped microstructures are provided on the reflecting surface. Each of the first V-shaped microstructures has a triangular cross-section having a first base angle nearest the incident surface, a second base angle furthest from the incident surface and a vertex angle. A pitch between adjacent microstructures is configured to be substantially constant. A size of each of the first V-shaped microstructures is defined by the equation is y=9.2637&#xd7;10x&#x2212;0.0003x+0.0232, wherein x is a distance from a given first V-shaped microstructures to the incident surface (in units of micrometers), and wherein y is a base width of the given first V-shaped microstructures (in units of micrometers).

A light guide device () and a backlight module using the same. The light guide device includes: an incident surface (); an emitting surface () adjacent to the incident surface; a reflecting surface () opposited to the emitting surface; a plurality of first V-shaped structures () formed on the emitting surface; and a plurality of second V-shaped structures () formed on the reflecting surface and perpendicular to the first V-shaped structures, wherein respective heigths of the second V-shaped structures increase with increasing distance from the incident surface and respective distances between adjacent second V-shaped structures decrease with increasing distance from the incident surface. The light guide device of the present invention does not need optical elements, and thus has a simple structure. A backlight module using the same light guide plate is also provided.

Growing community of inventors

Beijing, China

Di Feng