CN201401733Y

CN201401733Y - Light guide plate and backlight module thereof

Info

Publication number: CN201401733Y
Application number: CN2009201377974U
Authority: CN
Inventors: 傅彦菳; 王耀东
Original assignee: CPTF Optronics Co Ltd; Chunghwa Picture Tubes Ltd
Current assignee: CPTF Optronics Co Ltd
Priority date: 2009-04-23
Filing date: 2009-04-23
Publication date: 2010-02-10
Anticipated expiration: 2019-04-23

Abstract

The utility model relates to a light guide plate and a backlight module thereof, comprising a light guide plate, an optical diaphragm group, a light source, a reflecting plate and a back frame, wherein the light guide plate is provided with a light-out surface and a light-in surface and comprises a first light guide part and a second light guide part adjacent to the first light guide part, whereinthe first light guide part is a polygon and the second light guide part is a rectangle; the optical diaphragm group is arranged on the light-out surface of the light guide plate; the light source isarranged on the light-in surface of the light guide plate; the reflecting plate is arranged at an opposite side of the light-out surface of the light guide plate; and the back frame contains the reflecting sheet, the light source and the light guide plate. The utility model can output even and high-brightness light source, improve the whole light-out efficiency so as to be beneficial to the utilization of the following light source, can reduce the defect that the colors of the light guide plate and the backlight module thereof are uneven and improve image quality.

Description

LGP and module backlight thereof

Technical field

The utility model is about a kind of LGP and module backlight thereof, and it is can reduce the look uneven shortcoming of LGP and module backlight thereof and promote image quality, and is applied to promote the field of mixed light effect.

Background technology

Because the manufacturing technology of liquid crystal indicator is progressive fast, with and have light, thin, power saving and an advantage such as radiationless, therefore make liquid crystal indicator be applied in widely on the industries such as personal digital assistant, notebook computer, liquid crystal screen display and TV, but because liquid crystal indicator is not a self-luminous display device, so need to cooperate the light source that module backlight provided, could show the picture that will show.In order to allow liquid crystal indicator meet the demand of slimming, so the slimming of module backlight becomes the target that primarily reaches in the liquid crystal indicator, utilize a kind of known module backlight of side entering type light source can reach the requirement of slimming at present, this module 1 backlight that this is known, as shown in Figure 1, it comprises: a LGP 110; One optical diaphragm group 120, it is located at the upper surface of LGP 110; The patterned layer 130 of one scattered beam is located at the lower surface of LGP 110; One light source 140, it is located at these relative both sides of LGP 110 respectively; One reflector plate 150, it is located at the below of LGP 110; Reach a back of the body frame 160, which is provided with reflector plate 150, wherein carry on the back frame 160 ccontaining light source 140 and LGPs 110.

But known this module 1 backlight must use a LGP 110, it is to be a complete platy structure (as shown in Figure 1), when especially this LGP 110 is applied to the liquid crystal indicator of large-size, the mixed light insufficient space of this LGP 110 will cause bright dark inequality, and then produce bright rays/dark line, cause image quality not good.

Because the improving of above-mentioned known technology, so the utility model provides a kind of LGP and module backlight thereof, it can improve the not good shortcoming with the look inequality of the mixed light of known technology.

Summary of the invention

Main purpose of the present utility model, be to provide a kind of LGP and module backlight thereof, it can make in the module backlight the even bright dipping of light source to optical diaphragm group, to reach the purpose of avoiding producing dark line and bright rays (being the look uneven phenomenon) on LGP/optical diaphragm group.

The utility model provides a kind of LGP and module backlight thereof.Module backlight comprises: a LGP, have an exiting surface and an incidence surface, and this LGP comprises: one first light guide section, and be one second light guide section adjacent with first light guide section, wherein, first light guide section is a polygon, second light guide section is a rectangle; One optical diaphragm group, it is located at the exiting surface of LGP; One light source, it is located at the incidence surface of LGP; One reflector plate, it is located at a subtend of the exiting surface of LGP; Reach a back of the body frame, wherein carry on the back the ccontaining reflector plate of frame, light source and LGP, first light guide section like this and second light guide section make the light source bright dipping even to the brightness of optical diaphragm group.

Description of drawings

Fig. 1 is the part schematic diagram of known module backlight.

Fig. 2 A～Fig. 2 B is the part schematic diagram of the utility model embodiment one module backlight.

[main element symbol description]

1,10 module 160,260 back of the body frames backlight

110,210 LGPs, 211 first light guide sections

120,220 optical diaphragm group, 212 second light guide sections

130,230 patterned layer, 213 exiting surfaces

140,240 light sources, 214 incidence surfaces

150,250 reflector plates

The specific embodiment

The LGP 210 of the utility model embodiment, shown in Fig. 2 A, comprise: a LGP 210, an incidence surface 214 that has an exiting surface 213 and be connected with exiting surface 213, this LGP also comprises: one first light guide section 211, and be one second light guide section 212 adjacent with first light guide section 211, wherein, first light guide section 211 is polygons, its shape is at least the above sheet-pile body of a quadrangle, and second light guide section 212 is rectangles, and it is shaped as a wedge shape or the sheet-pile body of a writing board shape, wherein, first light guide section 211 and second light guide section 212 are preferably integrally formed.In addition, the lower surface of LGP 210 can have a patterned layer 230, and one of them or its that can be V-shaped groove, circular shaped lattice point, rhombus site and oval site combine, in order to reflection and scattering are taken place light, and, make LGP 210 luminous even to each different directions transmission.

The major subjects of the utility model embodiment, shown in Fig. 2 A, first light guide section 211 is to can be the above arbitrary polygonal panel column LGP of quadrangle, pentagon, hexagon or quadrangle, so as to utilizing first light guide section 211 to increase the mixed light area that light source 240 is incident to LGP 210, make the light of viewing area (figure do not show) can avoid not having the look inequality shortcoming of dark line and no bright rays, promoted image quality.

The module backlight 10 of the utility model embodiment, shown in Fig. 2 A and Fig. 2 B, comprise: a LGP 210, have an exiting surface 213 and an incidence surface 214, this LGP also comprises: one first light guide section 211, and be one second light guide section 212 adjacent with first light guide section 211, wherein, first light guide section 211 is polygons, and second light guide section 212 is rectangles; One optical diaphragm group 220, it is located at the exiting surface 213 of LGP 210; One light source 240, it is adjacent to the incidence surface 214 of LGP 210; One reflector plate 250, it is located at the subtend of the exiting surface 214 of LGP 210; Reach a back of the body frame 260, wherein can utilize back of the body frame 260 ccontaining reflector plates 250, light source 240 and LGP 210, light source 240 can be fluorescent lamp or light-emittingdiode, so the light of light source 240 can be by first light guide section 211 and second light guide section 212 look inequality (dark line and the bright rays) shortcoming to reduce LGP 211 and module backlight 10 thereof, make module 10 even bright dippings backlight to optical diaphragm group 220, exported the light source of even and high briliancy, promote whole light emitting efficiency, in order to the utilization and the lifting image quality of follow-up light source.

Comprehensively above-mentioned, the utlity model has following advantage:

1. the utility model can make in the module backlight the light source bright dipping even to the brightness of optical diaphragm group, to avoid producing dark line and bright rays on optical diaphragm group, promptly avoids (mura) phenomenon of look inequality.

2. the utility model can be avoided reducing to cause the light mixing distance deficiency because of the spacing of diffuser plate and reflector plate, the look uneven phenomenon that is produced, and then reach purpose of thinness.

The above person of thought, it only is the utility model preferred embodiment, be not to be used for limiting the scope that the utility model is implemented, so the equalization of doing according to the described shape of the utility model claim, structure, feature and spirit changes and modifies such as, all should be included in the claim of the present utility model.

Claims

1. a LGP is characterized in that, comprising:

One LGP has an exiting surface and an incidence surface, and this LGP comprises:

One first light guide section; And

One second light guide section is adjacent with this first light guide section;

Wherein, this first light guide section is a polygon, and this second light guide section is a rectangle.

2. LGP according to claim 1 is characterized in that: this this polygon-shaped first light guide section is the above arbitrary polygon light guide section of quadrangle.

3. LGP according to claim 1 is characterized in that: this this rectangular-shaped second light guide section is a wedge shape light guide section or a plate shaped light guide section.

4. LGP according to claim 1 is characterized in that: this first light guide section and this second light guide section are integrally formed.

5. LGP according to claim 1 is characterized in that: the lower surface of this LGP is a patterned layer, and one of them or its that this patterned layer can be V-shaped groove, circular shaped lattice point, rhombus site and oval site combine.

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

One first light guide section; And

One second light guide section is adjacent with this first light guide section;

Wherein, this first light guide section is a polygon, and this second light guide section is a rectangle;

One optical diaphragm group, it is located at this exiting surface of this LGP;

One light source, it is adjacent to this incidence surface of this LGP;

One reflector plate, it is located at a subtend of this exiting surface of this LGP; And

One back of the body frame wherein should be carried on the back ccontaining this reflector plate of frame, this light source and this LGP.

7. module backlight according to claim 6 is characterized in that: this this polygon-shaped first light guide section is the above arbitrary polygon light guide section of quadrangle, and this this rectangular-shaped second light guide section is a wedge shape light guide section or a plate shaped light guide section.

8. module backlight according to claim 6 is characterized in that: this first light guide section and this second light guide section are integrally formed.

9. module backlight according to claim 6 is characterized in that: the lower surface of this LGP is a patterned layer, and one of them or its that this patterned layer can be V-shaped groove, circular shaped lattice point, rhombus site and oval site combine.

10. module backlight according to claim 6 is characterized in that: this light source is a fluorescent tube or a light-emittingdiode.