CN102434824A

CN102434824A - Backlight module

Info

Publication number: CN102434824A
Application number: CN2011103594277A
Authority: CN
Inventors: 赵永贵
Original assignee: AU Optronics Suzhou Corp Ltd; AU Optronics Corp
Current assignee: AU Optronics Suzhou Corp Ltd; AU Optronics Corp
Priority date: 2011-11-09
Filing date: 2011-11-09
Publication date: 2012-05-02

Abstract

A backlight module comprises a light guide plate, a circuit board, a plurality of light sources, an outer frame and an optical film. The light guide plate is provided with a light input face and a light output face. The light input face is located on one side of the light guide plate and symmetrically formed by two first inclined planes. The two first inclined planes are mutually connected to form an included angle. The circuit board corresponds to the light input face of the light guide plate, and the plurality of light sources on two second inclined planes are arranged in staggered mode. The plurality of light sources are disposed on the second inclined planes of the circuit board and correspond to the first inclined planes. The outer frame is provided with a plurality of bends so as to form a containing space to match with the light guide plate and contain the circuit board, the light sources and the light guide plate. The optical film is arranged on the light output face of the light guide plate and contained inside the outer frame. The backlight module is capable of reducing weight, enabling emitted light to be more even and also enabling the light sources to correspond to the light guide plate well in position.

Description

A kind of module backlight

Technical field

The present invention relates to a kind of module backlight, relate in particular to a kind of module backlight with optical element.

Background technology

Module backlight (Back Light Unit is abbreviated as BLU) is one of key component of panel of LCD, and function is well-off brightness and the light source that is evenly distributed, and makes normally show image of LCD.In order to show the birth of high-quality picture, especially panel computer, the brightness of module backlight there is higher requirement.Module backlight (BLU) can be divided into vertical type and side type.At present, in side type module backlight, usually adopt the number that increases light emitting diode (LED) or the mode through LGP bilateral light inlet to realize high brightness, yet these modes can limit optical property or increase the thickness of module backlight (BLU).Also having a kind of mode is that light inlet one side of LGP is provided with the tri coloured lantern bar, adopts independently each Self Control of circuit board, and the three primary colors light source can go into the light direction parallel arranged same, so this kind mode can cause mixed light inhomogeneous.

In view of this, how to design a kind of module backlight (BLU), can increase the incident area; Improve optically focused to increase the utilization rate of light; And can make bright dipping even, and can not increase the weight of module backlight (BLU), be the problem that those skilled in the art need solution badly.

Summary of the invention

In prior art, the module backlight (BLU) of existence is thicker, and bright dipping is inhomogeneous, and light source and the LGP defective of easy fitted not, the invention provides a kind of module backlight.

According to the present invention a kind of module backlight is provided, comprises: LGP, circuit board, a plurality of light source, housing and blooming.LGP has incidence surface and exiting surface, and incidence surface is positioned at LGP one side and is formed symmetrically by two first inclined-planes, and two first inclined-planes are interconnected to form an angle.Circuit board is corresponding with the incidence surface of LGP, and a plurality of light sources on two second inclined-planes are staggered.A plurality of light sources are arranged on second inclined-plane of circuit board, and corresponding with first inclined-plane.Housing has a plurality of bendings and matches with LGP to form an accommodation space, comes ccontaining circuit board, light source and LGP.Blooming is arranged on the exiting surface of LGP, and is placed in the housing.

Preferably, angle is a right angle.

Preferably, angle is an acute angle.

Preferably, circuit board more comprises a plane connecting two second inclined-planes, and corresponding with common limit, said two first inclined-planes.

Preferably, circuit board is a flexible printed circuit board.

Preferably, attach through double faced adhesive tape between circuit board and the housing.

Preferably, a plurality of light sources are a plurality of LED.

Preferably, the exiting surface of LGP is a flat surfaces.

Preferably, the exiting surface of LGP has a depression, and blooming is positioned at depression.

Adopt advantage of the present invention to be: the side through LGP designs framework increase incident area triangular in shape, can alleviate the weight of module backlight.In addition, only utilize with a slice circuit board to drive, being staggered between the light source to make the light of ejaculation more even, and being equipped with of light source and LGP can make the contraposition preferably of light source and LGP simultaneously.

Description of drawings

The reader with reference to advantages after the specific embodiment of the present invention, will become apparent various aspects of the present invention.Wherein,

Fig. 1 shows the structural representation according to module backlight in one embodiment of the present of invention.

Fig. 2 shows the structural representation according to module backlight in an alternative embodiment of the invention.

The specific embodiment

With reference to the accompanying drawings, specific embodiments of the invention is done further to describe in detail.

Fig. 1 shows the structural representation according to module backlight in one embodiment of the present of invention.With reference to Fig. 1, module 1 backlight comprises: LGP 10, circuit board 11, a plurality of light source 12, housing 13 and blooming 14.Wherein, LGP 10 has incidence surface 101 and exiting surface 102, and incidence surface 101 is positioned at a side of LGP 10; Form symmetrically by two first inclined-planes 103; And two first inclined-planes 103 are interconnected to form an angle theta, and in the present embodiment, angle theta is a right angle; In the additional embodiments, angle theta can be an acute angle.Exiting surface 102 is smooth surfaces.Circuit board 11 is corresponding with the incidence surface 101 of LGP 10; And it is corresponding with first inclined-plane 103 to have two second inclined-planes 111; In the present embodiment, be connected through a plane 112 between two second inclined-planes 111, plane 112 is corresponding to the common side 104 in two first inclined-planes 103.Be respectively arranged with a plurality of light sources 12 on two second inclined-planes 111 of circuit board 11, be LED here, and the light source 12 on one second inclined-plane 111 is staggered with the light source 12 on another second inclined-plane 111.Because these light sources 12 are to be positioned on the same circuit board 11, can keep a drive capacitor, it is staggered adding, so the light that sees through LGP 10 can be more even.In the present embodiment, circuit board 11 is a flexible printed circuit board.Housing 13 has a plurality of accommodation spaces (not illustrating) that are bent to form and matches with LGP 10, with ccontaining LGP 10, circuit board 11 and light source 12.Attach through double faced adhesive tape between housing 13 and the circuit board 11.Blooming 14 is positioned on the exiting surface 102 of LGP 10, and is placed in the housing 13.Since housing 13 be bent to form the accommodation space that matches with LGP 10, therefore on the basis of increase quantity of light source, make that the thickness of entire aphototropism mould 1 is thinner, more favourable to the competition of liquid crystal panel slimming.

Fig. 2 shows the structural representation according to module backlight in one embodiment of the present of invention.With reference to Fig. 2, with embodiment illustrated in fig. 1 in identical, module 1 backlight comprises: LGP 10, circuit board 11, a plurality of light source 12, housing 13 and blooming 14.Different is, in the module 1 backlight, the exiting surface 102 of LGP 10 has a depression 105, and blooming 14 is positioned at depression 105.Correspondingly, housing 13 matches with LGP 10, to coat LGP 10, circuit board 11 and blooming 14.This kind design can further reduce the thickness of module 1 backlight.

In the preceding text, illustrate and describe the specific embodiment of the present invention.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also specific embodiments of the invention do various changes and replacement.These changes and replacement all drop in claims restricted portion of the present invention.

Claims

1. a module backlight is characterized in that, comprising:

One LGP has incidence surface and exiting surface, and said incidence surface is positioned at said LGP one side and is formed symmetrically by two first inclined-planes, and said two first inclined-planes are interconnected to form an angle;

One circuit board, corresponding with the said incidence surface of said LGP, and it is corresponding with said first inclined-plane to have two second inclined-planes;

A plurality of light sources are arranged on said second inclined-plane of said circuit board, and the said a plurality of light sources on said two second inclined-planes are staggered;

One housing has a plurality of bendings and matches with said LGP to form an accommodation space, comes ccontaining said circuit board, said light source and said LGP; And

Blooming is arranged on the exiting surface of said LGP, and is placed in the said housing.

2. module backlight as claimed in claim 1 is characterized in that, said angle is a right angle.

3. module backlight as claimed in claim 1 is characterized in that, said angle is an acute angle.

4. module backlight as claimed in claim 1 is characterized in that, said circuit board more comprises a plane connecting said two second inclined-planes, and corresponding with common limit, said two first inclined-planes.

5. module backlight as claimed in claim 1 is characterized in that, said circuit board is a flexible printed circuit board.

6. module backlight as claimed in claim 1 is characterized in that, attaches through double faced adhesive tape between said circuit board and the said housing.

7. module backlight as claimed in claim 1 is characterized in that, said a plurality of light sources are a plurality of LED.

8. like each described module backlight in the claim 1 to 7, it is characterized in that the said exiting surface of said LGP is a flat surfaces.

9. like each described module backlight in the claim 1 to 7, it is characterized in that the said exiting surface of said LGP has a depression, said blooming is positioned at said depression.