This application claims the priority benefit of Taiwan application serial no. 98203482, filed Mar. 6, 2009. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.
1. Field of the Invention
The present invention generally relates to a light guide plate and a backlight module thereof, in particular, to a lightweight light guide plate and a backlight module thereof, which are applied in a field of reducing a weight of a light guide plate and a backlight module thereof.
2. Description of Related Art
As the manufacturing technology of a liquid crystal display (LCD) device has made rapid progress, and the LCD device has advantages of being light, thin, power-saving, and free of radiation, the LCD device has been widely applied in industries such as personal digital assistants (PDAs), notebook computers, liquid crystal screens, and televisions. However, as the LCD device is not a self light-illuminance display device, it displays images under the assistance of a light source provided by a backlight module. In order to enable the LCD device to meet a thin-type requirement, the thin-type design of the backlight module in the LCD device becomes the foremost challenge. Currently, a conventional backlight module using a side-type light source is able to meet the thin-type requirement. As shown in
However, the conventional backlight module 1 has to use the light guide plate 11 which is an integral plate structure (as shown in
Since the related art need to be improved, the present invention provides a lightweight light guide plate and a backlight module thereof, which can ameliorate the disadvantages of the light guide plate in the related art that the weight of the light guide plate, the weight of the backlight module, and the cost of the materials for the light guide plate are increased.
Accordingly, the present invention is directed to a lightweight light guide plate and a backlight module thereof, which are able to reduce a weight of the light guide plate and the backlight module thereof, so as to achieve a lightweight effect.
The present invention is further directed to a lightweight light guide plate and a backlight module thereof; which are able to save the cost of materials for the light guide plate.
As embodied and broadly described herein, the present invention provides a lightweight light guide plate and a backlight module thereof. The lightweight light guide plate includes a light guide plate body whose thickness gradually reduces from four edges of the light guide plate body respectively to a center point of the light guide plate body to form a concave, and a plurality of net points disposed on the concave, in which a unit area density of the plurality of net points gradually increases from the four edges to the center point of the light guide plate body. The backlight module of the lightweight light guide plate includes a light guide plate whose thickness gradually reduces from four edges of the light guide plate body respectively to a center point of the light guide plate body to form a concave, a plurality of net points disposed on the concave of the light guide plate body, in which a unit area density of the plurality of net points gradually increases from the four edges to the center point of the light guide plate body, an optical film group disposed on a plane of the light guide plate body, a plurality of light emitting diodes (LEDs) disposed at the four edges of the light guide plate body respectively, a reflector disposed corresponding to the concave of the light guide plate body, and a back frame having the reflector disposed thereon, in which the back frame accommodates the plurality of LEDs and the light guide plate body and the back frame fixes the plurality of LEDs at the four edges of the light guide plate body.
To make technical features and the achieved efficacies of the present invention more comprehensible, embodiments are illustrated in detail in the following with reference to the accompanying drawings.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
A lightweight light guide plate in the present invention is as shown in
The light guide plate body 21 includes four triangular tilted blocks 213. A thickness of each triangular tilted block 213 reduces from a base 2131 to a vertex angle 2132. The vertex angle 2132 of each triangular tilted block 213 is disposed at the center point of the light guide plate body 21 and one side 2133 of each triangular tilted block 213 is connected to one side 2133 of another triangular tilted block 213.
Two of the triangular tilted blocks 213 are disposed opposite to each other and the other two triangular tilted blocks 213 are disposed opposite to each other in the same way. When the light guide plate body 21 is a rectangular light guide plate, two bases of the two triangular tilted blocks are greater than that of the other two triangular tilted blocks.
A backlight module 2 of the lightweight light guide plate of the present invention is as shown in
In view of the above, the lightweight light guide plate and the backlight module thereof according to the present invention have the following advantages.
1. The present invention can reduce the weight of the light guide plate and the weight of the backlight module thereof, so as to achieve the lightweight effect.
2. The present invention can save the cost of materials for the light guide plate.
Therefore, the present invention has novelty, non-obviousness and industrial applicability, such that the present invention conforms to the statutory requirements for patentability.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
Number | Date | Country | Kind |
---|---|---|---|
98203482 | Mar 2009 | TW | national |