CN201666517U

CN201666517U - A backlight module

Info

Publication number: CN201666517U
Application number: CN2010201500365U
Authority: CN
Inventors: 王金明
Original assignee: BYD Co Ltd
Current assignee: Shenzhen Holitech Optoelectronics Co Ltd
Priority date: 2010-03-30
Filing date: 2010-03-30
Publication date: 2010-12-08
Anticipated expiration: 2020-03-30

Abstract

The utility model provides a new type backlight module comprising a housing, luminescent components, and a light guide plate. The said housing is an integrated frame with a groove on the upper surface of the bottom end rail of the housing. The light guide plate is also embedded in the housing and the luminescent components include a flexible printed circuit (FPC), and the front of the said groove is covered with double-faced adhesive tape. The back of the double-faced adhesive tape is connected to the light guide plate as well as to the front of the groove. The front of the double-faced adhesive tape, however, is connected to the FPC. Crossing the double-faced adhesive tape and housed in the said groove, the said LED is surrounded by double-faced adhesive tape from four directions. The said double-faced adhesive tape is black on the front and white on the back. The backlight module provided hereby can prevent bright spots from appearing in the visible area of a backlight module close to a LED. In the meanwhile, the backlight mould can also greatly improve the illuminant effects of the visible area of a backlight module.

Description

A kind of module backlight

Technical field

The utility model relates to light source technology, particularly a kind of module backlight.

Background technology

As shown in Figure 1, for having the decomposition texture schematic diagram of module backlight now.Existing module backlight roughly comprises: glue frame 1, LGP 2, luminescence component 3.

Glue frame 1 is the framework of a rectangle, by upper and lower two crossbeams and about the sealing of two longerons form; The upper surface of glue frame 1 sill 10 has three grooves 11.

LGP 2 is for to have the laminated structure of predetermined thickness, and its bottom surface is the incidence surface of LGP, and incidence surface is towards groove 11, in the front of glue frame 1 is embedded in glue frame 1.

Luminescence component 3 comprise flexible PCB (Flexible Printed Circuit, FPC) 31, (Surface Mount Technology SMT) is welded with three light emitting diodes (LED) (not marking among the figure) by surface mounting technology at the back side of FPC; The front of glue frame sill is fixed at the back side of FPC by double faced adhesive tape 4.Correspondingly, three LED that are welded in the FPC back side be contained in three grooves of this sill upper surface respectively and the light-emitting area of three LED towards the incidence surface of LGP.Its double faced adhesive tape structure is similar " U " shape structure with opening upwards.

In the practical application, the light beam that penetrates for the light-emitting area that guarantees LED can all be incident upon the inside of LGP from the LGP incidence surface, should make the incidence surface of light-emitting area bottom LGP of LED closely contact.Like this, LED directly launches light to LGP as spot light.

At present electronic product is all towards ultra-thinization development, and module backlight shows one of important component part of parts as screen, also bears the important task of attenuate simultaneously, and LGP is attenuate thereupon also, and light guide effect will weaken to some extent.In addition,, produce bright spot because LED makes LGP concentrate at the part light near light source directly to LGP emission light, thereby at the illumination effect that influences module backlight viewing area.

The utility model content

The utility model provides a kind of uniform module backlight of the light that incides module backlight viewing area that makes for the technical problem of the module backlight viewing area generation bright spot of solution prior art.

The technical solution adopted in the utility model is as follows:

A kind of module backlight comprises: glue frame, luminescence component, LGP,

Described glue frame is a framework, and the upper surface of described glue frame sill has groove;

Described LGP is the laminated structure with predetermined thickness; Described LGP be embedded in the described glue frame and the incidence surface of its bottom towards the bottom surface of described groove;

Comprise FPC FPC in the described luminescence component, and the described FPC one side that is welded with LED is fixed in the front of described glue frame sill;

The front of described groove is coated with double faced adhesive tape, and the back side of double faced adhesive tape connects the front of LGP and groove, and the front of double faced adhesive tape connects FPC;

Described LED passes double faced adhesive tape and is contained in the described groove, and the light-emitting area of described LED is towards the incidence surface of described LGP;

Be surrounded with double faced adhesive tape around the described LED, the front of described double faced adhesive tape is a black side, and the back side is white face.

Further, described double faced adhesive tape is " returning " shape structure with square hole.

The front of described sill has the concave face of accommodating double faced adhesive tape.

The module backlight that provides according to the utility model, the back side of its double faced adhesive tape is white, has the reflection function characteristic, can be in LGP with the light diffuse reflection of LED directive LGP, avoid LED light to inject to, and the front of double faced adhesive tape is a black, can absorb the light that LED penetrates near in the module visible area backlight at light source place, light free of losses, brightness also can correspondingly promote.In addition, set up adhesive tape at the opening part of the double faced adhesive tape structure of original opening with the across seal structure, make LED be surrounded with double faced adhesive tape all around, LED and LGP have directly been set up double faced adhesive tape like this, the light of LED can directly not injected LGP, has avoided occurring bright spot, has strengthened the area of double faced adhesive tape simultaneously yet, avoid FPC to be pasted not strongly, produce bounce-back.Make module visible area inner glow effect backlight obtain very big improvement.

Description of drawings

Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of module backlight of the prior art;

Fig. 2 is the structural representation of the double faced adhesive tape of module backlight in the prior art;

Fig. 3 is the structural representation of the double faced adhesive tape of module backlight in the utility model;

Fig. 4 is the STRUCTURE DECOMPOSITION schematic diagram of double faced adhesive tape and luminescence component in the utility model;

Fig. 5 is the decomposition texture schematic diagram of module backlight in the utility model.

The specific embodiment

Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

The decomposition texture schematic diagram of the module backlight that provides as Fig. 4, the utility model embodiment shown in Figure 5.Module backlight specifically comprises: glue frame 1, LGP 2, luminescence component 3, double faced adhesive tape 4, reflector plate 5, some blooming pieces 6, and shading patch 7.

Glue frame 1 is the framework of a rectangle, by two crossbeams up and down and about two longerons sealings form; The upper surface of glue frame 1 sill 10 has three grooves 11.

Reflector plate 5 is fixed in the back side of glue frame 1.

LGP 2 is for having the laminated structure of predetermined thickness, and its back side is that site face, front are the incidence surface of LGP 2 for exiting surface, bottom surface.The site face of LGP 2 towards reflector plate 5, as the bottom surface of incidence surface towards groove 11, in the front of glue frame 1 is embedded in glue frame 1, and the site face of LGP 2 and reflector plate 5 applyings.

Luminescence component 3 comprises flexible PCB FPC31, and the back side of FPC 31 is welded with three light emitting diodes (LED) 32 by SMT; And the lower limb of FPC extends a golden finger 33.The front of glue frame 1 sill 10 is fixed at the back side of FPC by double faced adhesive tape 4.Correspondingly, three LED that are welded in the FPC front be contained in three grooves 11 of these sill 10 upper surfaces respectively and the light-emitting area of three LED towards the incidence surface of LGP.

The front of described sill has the concave face 12 of accommodating double faced adhesive tape, reasonably makes the total attenuate.

Wherein, LED 32 is the illuminated LED of side, and each LED is a light-emitting area towards the side of top, only is to be example with three LED, three grooves among Fig. 5, and the LED of any amount and the groove identical with LED quantity can be set in the practical application.

The double faced adhesive tape that the front of described groove covers, the back side of double faced adhesive tape connects the front of LGP and groove, and the front of double faced adhesive tape connects FPC;

Described LED passes double faced adhesive tape and is contained in the described groove, is surrounded with double faced adhesive tape around the described LED, and the front of described double faced adhesive tape is a black side, and the back side is white face.

Double faced adhesive tape structure is as shown in Figure 3 set up adhesive tape 41 with the across seal structure at the opening part of the double faced adhesive tape structure of original opening, has " returning " type structure of square hole 42 in the middle of forming, and described square hole is with so that LED passes.

This kind " returns " the black and white double faced adhesive tape of type structure, near increasing colloid 41 on the light conductor of visible area, a part penetrated the light diffuse reflection in light conductor from the LED exiting surface before LED, recycles; Increase colloid in addition and also quite increased occlusion part in the LED front, can shut out the light directly is incident upon the blooming cross section from LED, avoids bright spot.Increase the area of double faced adhesive tape simultaneously, improve the fastness of assemblies such as FPC, avoid bounce-back, the bright spot phenomenon occurs, and greatly reduces the loss of the luminous energy of led light source, and brightness also can correspondingly promote.Give people's visual impact decreased sensation, make that the illumination effect of entire aphototropism mould is even.

In addition, some blooming pieces 6 are fitted in the front of glue frame 1 is embedded in glue frame 1 and with the exiting surface of LGP 2 successively; Shading patch 7 then is pasted on the front outer surface of glue frame 1 and blooming piece 6 is fixed in the glue frame 1.

Like this, the light beam of the light-emitting area of LED ejaculation is incident upon the inside of LGP from the LGP incidence surface; Be incident upon the light beam of LGP inside, can inject earlier after the site face is also broken up, the exiting surface by LGP penetrates to blooming piece again; Reflector plate then is in the light reflected back LGP 2 that a part is penetrated from the site face, to improve the utilization rate of luminous energy; All penetrate to the light beam of blooming piece and all can evenly penetrate from the one side of blooming piece face away from light guide.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. module backlight comprises: glue frame, luminescence component, LGP, and described glue frame is a framework, the upper surface of described glue frame sill has groove;

It is characterized in that be surrounded with double faced adhesive tape around the described LED, the front of described double faced adhesive tape is a black side, the back side is white face.

2. module backlight as claimed in claim 1 is characterized in that, described double faced adhesive tape is " returning " shape structure with square hole.

3. module backlight as claimed in claim 1 is characterized in that the front of described sill has the concave face of accommodating double faced adhesive tape.