CN102182969A

CN102182969A - Side incident LED (Light Emitting Diode) light source backlight module

Info

Publication number: CN102182969A
Application number: CN2011101258727A
Authority: CN
Inventors: 杨梅慧
Original assignee: Konka Group Co Ltd
Current assignee: Konka Group Co Ltd
Priority date: 2011-05-16
Filing date: 2011-05-16
Publication date: 2011-09-14

Abstract

The invention provides a side incident LED (Light Emitting Diode) backlight module structure which comprises an LED light-bar light source, a middle frame bracket, an optical sheet, a light guide plate, a reflective sheet, heat radiating fins, a back plate, a mirror reflection bar and a light absorption buffer bar, wherein the mirror reflection bar and the light absorption buffer bar are adhered on the middle frame bracket, the mirror reflection bar corresponds to a gap between the surface of the LED light-bar light source and the incident surface of the light guide plate, and the light absorption buffer bar is located between the optical sheet and the middle frame bracket. When the scheme is adopted, light leaked out of the gap between the surface of an LED lamp and the incident surface of the light guide plate can be reflected back to the light guide plate through the mirror reflection bar, so that light loss is effectively reduced; the light absorption buffer bar absorbs remaining light beams, and prevents the remaining light beams from leaking from the gap between the optical sheet and the middle frame bracket, so that the light leakage phenomenon is improved; and meanwhile, the problems of the light loss and light leakage because an LED light emitting surface is equal to or larger than the incident surface of the light guide plate are solved, and the luminance, the energy efficiency and the luminance uniformity of the backlight module are improved.

Description

A kind of side entering type led light source module backlight

Technical field

The present invention relates to a kind of LED-backlit module, relate in particular to the side entering type led light source module backlight that LCD is used or TV uses.

Background technology

Along with the development and the client of LED lamp technology has been tending towards obviously to LCD and the lightening demand of LCD TV, the module backlight of side entering type led light source (the LED lamp is placed on the side of LGP) has become the main flow of this 2 years prior aries; The module backlight of side entering type led light source has energy-saving and environmental protection, low-power consumption, advantage such as ultra-thin.

The side entering type led light source is a spot light, and for spot light being become line source and area source, side entrance back need be used LGP; The light that the LED spot light of side sends enters LGP via the incidence surface of LGP, reflects and diffusion through the site of bottom surface of light guide plate, penetrates at the LGP exiting surface, via forming area source after a series of optical sheet diffusions.

Can expand because LGP is heated, so surperficial to needing to stay certain space between the LGP incidence surface at the LED lamp, simultaneously, the optical sheet above the LGP also needs the breathing space.Prevent that in order to reserve this breathing space to diaphragm diaphragm deformation from causing the display frame variation, add and consider the packaging technology tolerance, blooming piece is to needing to keep certain interval between the middle frame bracket, gap between this gap and LED lamp and the LGP incidence surface, the light that makes the LED lamp send fails all to enter LGP, part light can from optical sheet and pass in the space between the frame bracket, form light inlet side leakage light and problems such as bright wisp, luminance loss occur.Especially LED lamp light-emitting area height approximates or is more serious greater than phenomenon under the situation of LGP incidence surface.

Fig. 1 is a prior art side entering type LED-backlit modular structure sectional view, and Fig. 2 is the light path schematic diagram of Fig. 1 light inlet side.Therefrom we as can be seen, in order to reserve the horizontal expansion space of LGP, LED lamp source 1 surface has a space 14 between LGP 4 incidence surfaces; In order to reserve breathing space and assembly technology tolerance backlight for optical sheet 3, have space 123 between 2 between optical sheet 3 and the middle frame bracket.As seen from Figure 2 because the vertical light-emitting face of LED lamp surpasses the incidence surface of LGP, part light can from LED lamp 1 surface to space 14 LGP 4 incidence surfaces to optical sheet 3 and spill in the space 123 frame bracket 2, cause light leak and light loss phenomenon.

Therefore, prior art awaits improving and development.

Summary of the invention

The object of the present invention is to provide the glue frame bracket of a kind of side entering type LED-backlit module and use thereof, effectively reduce technological deficiencies such as the light leak of prior art back light module unit structure and light loss.

Technical scheme of the present invention is as follows: a kind of side entering type LED-backlit modular structure, comprise LED lamp bar light source, middle frame bracket, optical sheet, LGP, reflector plate, fin, backboard, minute surface reflection bar and extinction buffer bar, wherein, be pasted with minute surface reflection bar and extinction buffer bar on the frame bracket in described, space between the corresponding LED lamp of minute surface reflection bar bar light source surface and the LGP incidence surface, the extinction buffer bar is between optical sheet and middle frame bracket.

Described side entering type LED-backlit modular structure, wherein, described minute surface reflection bar is the reflection bar of high reflectance.

Described side entering type LED-backlit modular structure, wherein, what the structural member of described extinction buffer bar was used is the black auxiliary material.

Described side entering type LED-backlit modular structure, wherein, the bottom surface of described middle frame bracket can be the plane.

Described side entering type LED-backlit modular structure, wherein, described in the bottom surface of frame bracket can extend downwards in the position of corresponding center support bottom surface, gap between lamp surface and the LGP incidence surface.

Described side entering type LED-backlit modular structure, wherein, described LED lamp bar light source is at least one limit side entering type led light source.

Described side entering type LED-backlit modular structure, wherein, at the described optical sheet of light inlet side position edge to the distance on lamp surface greater than the distance of LGP incidence surface to the lamp surface.

Adopt such scheme, the present invention can realize spilling next light via in the minute surface reflection bar reflected back LGP from the space between LED lamp surface and the LGP incidence surface, effectively reduce light loss, and by the extinction buffer bar absorb and stop all the other light from optical sheet and space between the frame bracket spill, improved light leakage phenomena.This design must improve the brightness of module backlight in solution with making the LED exiting surface be equal to or greater than light loss and the light leakage phenomena that the LGP incidence surface causes, has improved the module efficiency, has improved brightness uniformity.

Description of drawings

Fig. 1 is a prior art side entering type LED-backlit modular structure sectional view.

Fig. 2 enters the light path schematic diagram of LGP for prior art side entering type LED-backlit die set light source.

Fig. 3 is according to embodiments of the invention 1 structural representation.

Fig. 4 is for to enter LGP light path schematic diagram according to embodiments of the invention 1 light source.

Fig. 5 is for to enter LGP light path schematic diagram according to embodiments of the invention 2 light sources.

Description of reference numerals:

1:LED lamp bar light source; 2: middle frame bracket; The 3-optical sheet; The 4-LGP; The 5-reflector plate; Structural members such as 6-fin, backboard; 7-minute surface reflection bar; 8-extinction buffer bar; Space between 14-LED lamp surface and the LGP incidence surface; Space between 123-optical sheet and the middle frame bracket.

The specific embodiment

The invention provides a kind of side entering type LED-backlit modular structure, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below with reference to accompanying drawing and give an actual example that the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

As shown in Figure 3-4, the embodiment of the invention 1 comprises at least one side LED lamp bar light source 1; Middle frame bracket 2; Optical sheet 3; LGP 4; Reflector plate 5; Structural member such as fin, backboard 6; Minute surface reflection bar 7; Extinction buffer bar 8.It is characterized in that: the position of frame bracket 2 attached minute surface reflection bar 7, the space 123 attaching extinction buffer bar 8 between optical sheet and middle frame bracket during space between LED lamp surface and LGP incidence surface 14 was corresponding.

Wherein, minute surface reflection bar 7 is the reflection bar of high reflectance, includes but not limited to silver-colored reflection bar;

Wherein, extinction buffer bar 8 be elasticity better, extinction effect buffer bar preferably, include but not limited to the black buffer bar that the structural member auxiliary material is used.

Wherein, middle frame bracket 2 bottom surfaces can be the plane, also 14 correspondence position positions, space can be extended downwards, reduce the light loss path;

Wherein, module backlight comprises at least one limit side entering type led light source;

Wherein, at the described optical sheet of light inlet side position 3 edges to the distance on lamp 1 surface greater than the distance of LGP 4 incidence surfaces to lamp 1 surface;

Wherein, the width position of minute surface reflection bar 7 and extinction buffer bar 8, thickness are set according to space 14 and space 123.In principle, the position in corresponding space 14, the position of minute surface reflection bar 7 can be extended toward LGP 4 directions slightly, but should keep certain distance with the edge of optical sheet 3, prevents that light is reflected on the optical sheet 3; The thickness of extinction buffer bar 8 is equal to or slightly less than the thickness in space 123, and the position is between optical sheet 3 edges and middle frame bracket 2 edges.

Adopt technique scheme, 14 light that spill from the space enter in the LGP 4 via the most of light of minute surface reflection bar 7 reflections, and all the other fraction light leaks are then absorbed by extinction buffer bar 8 and stop, have better improved light leak and light loss phenomenon.

As shown in Figure 5, frame bracket 2 moves down near led light source 1 in the 14 correspondence position positions, embodiment 2 usefulness spaces, make minute surface reflection bar 7 more close spaces 14, reduced the light loss passage, make most of light that spills from space 14 obtain utilizing in the reflected back LGP, remaining light leak is absorbed by extinction buffer bar 8, further reduces light loss and light leak.

Beneficial technical effects of the present invention is: spill next light via in the minute surface reflection bar reflected back LGP from the space between LED lamp surface and the LGP incidence surface, effectively reduce light loss, and by the extinction buffer bar absorb and stop all the other light from optical sheet and space between the frame bracket spill, improved light leakage phenomena.This design is resolved making the LED exiting surface be equal to or greater than light loss and the light leakage phenomena that the LGP incidence surface causes, has improved the brightness of module backlight, has improved the module efficiency, has improved brightness uniformity.

Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.

Claims

1. side entering type LED-backlit modular structure, comprise LED lamp bar light source, middle frame bracket, optical sheet, LGP, reflector plate, fin, backboard, minute surface reflection bar and extinction buffer bar, it is characterized in that, be pasted with minute surface reflection bar and extinction buffer bar on the frame bracket in described, space between the corresponding LED lamp of minute surface reflection bar bar light source surface and the LGP incidence surface, the extinction buffer bar is between optical sheet and middle frame bracket.

2. side entering type LED-backlit modular structure according to claim 1 is characterized in that described minute surface reflection bar is the reflection bar of high reflectance.

3. side entering type LED-backlit modular structure according to claim 1 is characterized in that, what the structural member of described extinction buffer bar was used is the black auxiliary material.

4. side entering type LED-backlit modular structure according to claim 1 is characterized in that, the bottom surface of described middle frame bracket is the plane.

5. side entering type LED-backlit modular structure according to claim 1 is characterized in that, described center support bottom surface can be extended downwards in the position of corresponding center support bottom surface, gap between lamp surface and the LGP incidence surface.

6. side entering type LED-backlit modular structure according to claim 1 is characterized in that, described LED lamp bar light source is at least one limit side entering type led light source.

7. side entering type LED-backlit modular structure according to claim 1 is characterized in that, at the described optical sheet of light inlet side position edge to the distance on lamp surface greater than the distance of LGP incidence surface to the lamp surface.