CN202361198U

CN202361198U - Novel backlight module

Info

Publication number: CN202361198U
Application number: CN2011204781505U
Authority: CN
Inventors: 陈建武
Original assignee: (fujian) Electronic Co Ltd
Current assignee: (fujian) Electronic Co Ltd
Priority date: 2011-11-25
Filing date: 2011-11-25
Publication date: 2012-08-01
Anticipated expiration: 2021-11-25

Abstract

The utility model discloses a novel backlight module. The backlight module comprises a light source, a light guide plate, a back plate, an intensifying plate and a rubber frame, wherein the light source is arranged opposite to the end face of the light guide plate, the light emitting side of the light source faces the end face of the light guide plate, and the intensifying plate is superposed at the outer bottom of the light guide plate; the back plate is provided with a back plate body arranged on the inner side of the light guide plate, a side plate extended outwards is arranged at each of two ends of the back plate body, and thus a frame-like structure capable of accommodating the intensifying plate, the light guide plate and the light source is formed; and a reflecting layer is stuck to each of the bottom of the back plate body facing the light guide plate and the lateral surfaces of the side plates facing the light source. Compared with the conventional backlight module, the backlight module has the advantages of high utilization rate of the light source and low cost, is easy to assemble and solves the problem of water ripples of a liquid crystal module.

Description

A kind of novel backlight module

Technical field

The utility model relates to LCD, a kind of specifically backlight liquid crystal display module.

Background technology

Module backlight (Back light module) is one of key component of LCD, because liquid crystal panel itself is not luminous, the function of module backlight promptly is well-off brightness and the light source that is evenly distributed, and makes normally show image of liquid crystal panel.

The basic structure of module backlight is as shown in Figure 1, mainly is made up of light source 1, LGP 2, reflector plate 3, backboard 4, add lustre to plate 5 and glue frame 6.

Light source commonly used at present has CCFL, LED lamp bar and electroluminescence sheet etc., and light source 1 is an example with LED lamp bar, and during use, LED lamp bar is laid on the pcb board 11.

LGP 2 is plate-like structure; Light source 1 is installed corresponding to the end face of LGP 2; The emission side of LED lamp bar is towards this end face of LGP 2; This end face of LGP 2 is the incidence surface 21 of LGP 2, and the light through incidence surface 21 is accepted from light source 1 is converted into line source by LGP 2 and is scattered in uniform surface light source.

Reflector plate 3 is attached at the inner bottom surface of LGP 2, will in the light reflected back LGP 2 that inner bottom surface spills, prevent that light source from leaking, to increase the service efficiency of light.

Graces plate 5 stacked inside the outer bottom surface of the light guide plate 2, after the light emitted from the light guide plate 2 is poor directivity must therefore be corrected using the credit plate 5 in the direction of light, by the principle of light refraction and reflection achieve cohesion light XIAN, raise the front luminance aim to increase efficiency in the use of light.

Backboard 4 has the backboard body 41 that is arranged at reflector plate 3 inboards; The two ends of backboard body 41 are respectively equipped with outward extending side plate 42; Formation can be held the frame shape structure of the plate 5 that adds lustre to, LGP 2, light source 1 and reflector plate 3, for they provide bottom support and fixing circuit board.

Glue frame 6 coats the outside of the side plate 42 that is arranged at backboard 4 respectively, and its cross section roughly is the L type, matches with backboard 4 to be used for supporting and the protection internal material.

There is following weak point in existing this module backlight:

One, because there is certain clearance in 21 of the incidence surfaces of light source 1 and LGP 2, like this, just there is certain leakage in the light that light source 1 is sent, causes the utilization rate of light source lower;

When two, assembling, need reflector plate 3 is attached at the inner bottom surface of LGP 2, assembling is trouble comparatively, wastes man-hour;

Three, because reflector plate 3 is inner bottom surfaces that assembling the time is attached to LGP 2 temporarily, if paste the poor quality, then can cause liquid crystal module in hot environment or similar reliability test, to produce the ripples line, influence the display quality of liquid crystal module;

Four, the material of reflector plate 3 is comparatively expensive, reach the requirement of strength of independent assembling, generally requires the thickness of reflector plate to reach 0.3mm, makes that the cost of module backlight is higher.

Summary of the invention

To the problems referred to above that existing module backlight exists, the purpose of the utility model provides a kind of novel backlight module, and it has, and the light source utilization rate is higher, simple, the lower-cost characteristics of assembling, and has overcome the problem of liquid crystal module ripples lines.

To achieve these goals, the utility model adopts following technical scheme:

A kind of novel backlight module comprises light source 1, LGP 2, backboard 4, add lustre to plate 5 and glue frame 6, and light source 1 is installed in the end face corresponding to LGP 2, and the emission side of light source 1 is towards this end face of LGP 2, and the plate 5 that adds lustre to is stacked at the outer bottom of LGP 2; Above-mentioned backboard 4 has the backboard body 41 that is arranged at above-mentioned LGP 2 inboards; The two ends of this backboard body 41 are respectively equipped with outward extending side plate 42; Formation can be held the frame shape structure of the above-mentioned plate 5 that adds lustre to, above-mentioned LGP 2 and above-mentioned light source 1; Above-mentioned backboard body 41 on the bottom surface of above-mentioned LGP 2 and above-mentioned side plate 42 on the side of above-mentioned light source 2, all be covered with reflecting layer 3a; Glue frame 6 coats the outside of the side plate 42 that is arranged at backboard 4 respectively, matches with backboard 4 to be used for supporting and the protection internal material.

Further, described light source 1 is CCFL, LED lamp bar or electroluminescence sheet.

Further, said reflecting layer 3a is a reflector plate.

Further, said reflecting layer 3a is a reflectance coating.

Further, the cross section of said glue frame 6 is the L type.

After adopting technique scheme, the novel backlight module of the utility model is compared with existing module backlight, has following advantage:

One, the reflecting layer directly pastes on backboard, makes that the light source reflection in the frame shape structure that places backboard maximizes, and the light source utilization rate has a distinct increment.Especially be directed against with the liquid crystal display of CCFL as light source, because of CCFL is face lamp source, the transmit direction of light is indefinite, uses this total reflection backboard in the utility model, and it is more obvious that optics promotes effect.

Two, because the reflecting layer is covered on the backboard in advance, need not the reflector plate that is sticked separately during assembling, assembling is simple, effectively saves man-hour;

Three, equally can guarantee the quality that pastes in reflecting layer, thereby prevent that effectively liquid crystal module from producing the ripples line in hot environment or similar reliability test because the reflecting layer is covered on the backboard in advance;

Four, same because the reflecting layer is covered on the backboard in advance, and the reflecting layer just need not to reach the required requirement of strength of independent assembling, and like this, the thickness in reflecting layer only needs 0.17mm just passable, thus reduce can module backlight cost.

Description of drawings

Fig. 1 is the structural representation of traditional backlight module;

Fig. 2 is the structural representation of the novel backlight module of the utility model.

Label declaration:

1-light source, 11-PCB plate, 2-LGP, 21-incidence surface, 3-reflector plate, 3a-reflecting layer, 4-backboard, 41-backboard body, 42-side plate, 5-add lustre to plate, 6-glue frame.

The specific embodiment

Combine the accompanying drawing and the specific embodiment that the utility model is further specified at present.

Embodiment 1:

The utility model is used for the novel optic plate of module backlight, and is as shown in Figure 2, comprises light source 1, LGP 2, reflecting layer 3a, backboard 4, plate 5 and glue frame 6 add lustre to.

Light source 1 can adopt CCFL, LED lamp bar and electroluminescence sheet etc., and in the present embodiment, light source 1 adopts LED lamp bar, and during use, LED lamp bar is laid on the pcb board 11.

LGP 2 is plate-like structure; Light source 1 is installed in the end face corresponding to LGP 2; The emission side of LED lamp bar is towards this end face of LGP 2; This end face of LGP 2 is the incidence surface 21 of LGP 2, and the light through incidence surface 21 is accepted from light source 1 is converted into line source by LGP 2 and is scattered in uniform surface light source.

Backboard 4 has the backboard body 41 that is arranged at LGP 2 inboards; The two ends of this backboard body 41 are respectively equipped with outward extending side plate 42; Formation can be held the ┗ ┛ shape frame shape structure of the plate 5 that adds lustre to, LGP 2 and light source 1 (and pcb board 11), for they provide bottom support and fixing circuit board.

Backboard body 41 on the bottom surface of LGP 2 and side plate 42 on the side of light source 1, all be covered with reflecting layer 3a; Promptly; All be covered with reflecting layer 3a on the frame inwall of the ┗ ┛ shape frame shape structure of backboard 4; In all directions with in the light reflected back LGP 2, prevent the light source leakage through reflecting layer 3a, to increase the service efficiency of light.In the utility model, reflecting layer 3a can adopt reflector plate, also can adopt the reflectance coating that is coated on the backboard.

The plate 5 that adds lustre to is stacked at the outer bottom of LGP 2; Light is relatively poor from the directive property that LGP 2 penetrates its light of back; Therefore must utilize the plate 5 that adds lustre to revise direction of light, its principle by the refraction of light with reflect the purpose that reaches cohesion light, the positive briliancy of raising, with the utilization benefit of increase light.

Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; Can make various variations to the utility model in form with on the details, be the protection domain of the utility model.

Claims

1. novel backlight module; Comprise light source (1), LGP (2), backboard (4), the plate that adds lustre to (5) and glue frame (6); Light source (1) is installed in the end face corresponding to LGP (2); The emission side of light source (1) is towards the end face of LGP (2); The plate (5) that adds lustre to is stacked at the outer bottom of LGP (1), it is characterized in that: said backboard (4) comprises the backboard body (41) that is arranged at above-mentioned LGP (2) inboard, and the two ends of this backboard body (41) are respectively equipped with outward extending side plate (42); Formation can be held the frame shape structure of the above-mentioned plate that adds lustre to (5), LGP (2) and light source (1); Above-mentioned backboard body (41) on the bottom surface of above-mentioned LGP (2) and above-mentioned side plate (42) on the side of above-mentioned light source (1), all be covered with reflecting layer (3a), glue frame (6) coats the outside of the side plate (42) that is arranged at backboard (4) respectively, matches with backboard (4) to be used for supporting and the protection internal material.

2. a kind of novel backlight module according to claim 1 is characterized in that: described light source (1) is CCFL, LED lamp bar or electroluminescence sheet.

3. a kind of novel backlight module according to claim 1 is characterized in that: above-mentioned reflecting layer (3a) is reflector plate.

4. a kind of novel backlight module according to claim 1 is characterized in that: above-mentioned reflecting layer (3a) is reflectance coating.

5. a kind of novel backlight module according to claim 1 is characterized in that: the cross section of said glue frame (6) is the L type.