CN201621556U

CN201621556U - Double-sided light-emitting and backlight source

Info

Publication number: CN201621556U
Application number: CN2009203522760U
Authority: CN
Inventors: 贺志坚; 查显超; 周小云
Original assignee: Shenzhen Shanben Optoelectronics Co Ltd
Current assignee: SHENZHEN SANBUM OPTOELECTRONICS CO., LTD.
Priority date: 2009-12-31
Filing date: 2009-12-31
Publication date: 2010-11-03
Anticipated expiration: 2019-12-31

Abstract

The utility model discloses a double-sided light-emitting and backlight source, comprising a rubber frame. The middle part of one side edge of the rubber frame is fixedly provided with a plurality of LEDs. The inner part of the rubber frame is provided with a first light guide plate the light-out port of which points to a first direction and a second light guide plate the light-out port of which points to a second direction opposite to the first direction, and the first light guide plate and the second light guide plate are provided with film plates in the light-out directions. A layer double-sided reflective film is arranged between the first light guide plate and the second light guide plate, and the lightness is increased by the high reflectivity of the reflective film. The backlight source changes the light-out mode of the inner part of the backlight source, and therefore the lightness of the backlight source in two directions is increased. If the double-sided reflective film is additionally arranged, the lightness is better.

Description

The double-side backlight

Technical field

The utility model relates to the LED-backlit source in a kind of LED-backlit source, particularly a kind of double-side, i.e. double screen LED-backlit source.

Background technology

At present supporting have the liquid crystal display product of backlight to be widely used in each demonstration field, and for handheld device, more high brightness is more and more higher with the requirement of more low-power consumption.Particularly be applicable to the display with double faces of handheld device,, cause brightness to reduce because of its another side when certain simultaneously shows has light leakage phenomena.

A LGP 800 is only adopted in traditional double-side LED-backlit source, as shown in Figure 1, comprise glue frame 810, fix and also realize a plurality of LED820 of electrical connection by FPC (flexible connector) 830 in glue frame one middle side edge, be arranged on the LGP 840 at glue frame middle part, and each the cover diaphragm 850 that is arranged at the LGP both sides respectively, every cover diaphragm comprise diffusion patch 851, down add lustre to patch 852, on add lustre to patch 853 and black and white double faced adhesive tape 854.By scattering/refraction and the cooperation of the diaphragm purpose that reach two-sided bright dipping of light in LGP, but light conducting plate structure complexity in this scheme, do not reach two-sided bright dipping, light need repeatedly reflect in LGP, therefore adopts this scheme can cause the loss of light because of the repeatedly reflection of light in LGP.

Thereby a kind of novel backlight source that under the situation that does not improve power consumption, significantly promotes brightness of demand.

The utility model content

The purpose of this utility model is the structure deficiency at existing double-sided display LED-backlit source, the bright dipping mode of change backlight inside, thereby the brightness that improves backlight.

For achieving the above object, the utility model provides a kind of double-side backlight.The utility model is achieved by following technical proposals:

A kind of double-side backlight, comprise a glue frame, middle part at a side of glue frame, be fixed with a plurality of LED, in the glue frame, be provided with light-emitting window and point to first LGP of first direction and second LGP that light-emitting window points to the second direction opposite with first direction, light direction at first LGP and second LGP is provided with lamina membranacea, is provided with one deck double-sided reflecting type reflectance coating between described first LGP and second LGP, utilizes the high reflectance of reflectance coating to improve brightness.

Preferably, described lamina membranacea comprise diffusion patch that mutual idol connects, down add lustre to patch, on add lustre to patch and black and white double faced adhesive tape.

The beneficial effects of the utility model are, at the structure deficiency in existing double-sided display LED-backlit source, have changed the bright dipping mode of backlight inside, thereby have improved the brightness of backlight at both direction, if set up double-sided reflecting type reflectance coating, then brightness is better.

Description of drawings

Fig. 1 is existing traditional double screen LED-backlit source structure schematic diagram

Fig. 2 is the utility model double screen LED-backlit source structure schematic diagram

The specific embodiment

With reference to Fig. 2, the utility model provides a kind of double-side backlight 100, comprise glue frame 10, a plurality of led light sources 20 that are fixed in glue frame 10 sides, be used to realize the FPC connector 30 of led light source electrical connection, be arranged at first LGP 41 on the glue frame 10, with second LGP 42, wherein the light-emitting window of first LGP 41 towards with the light-emitting window of second LGP 42 towards opposite, thereby can realize that two LGPs are respectively to the bottom surface and the end face emergent ray of glue frame 10, and on the glue frame, on the light direction of two LGPs, also be respectively arranged with a cover lamina membranacea 50, every cover lamina membranacea can comprise, diffusion patch 51, under the patch 52 that adds lustre to, on the patch 53 that adds lustre to, and black and white double faced adhesive tape 54.

The structure of lamina membranacea 50 is not a main feature of the present invention, and those skilled in the art can increase or reduce kind, the quantity of film according to actual conditions.

First LGP and second LGP are symmetrical arranged on the glue frame, and led light source 20 preferably is positioned at the middle part of the light inlet of two LGPs, thereby it is suitable to guarantee to enter every block of conduit light.

Between first LGP 41 and second LGP 42, be provided with double-sided reflecting type reflectance coating 60, this double-sided reflecting type reflectance coating, it is two-sided ESR reflectance coating, having that to use PET be the multi-layer film structure that resin is made as raw material, is the optical thin film that very high reflectivity is arranged in visible wavelength range.It can be used as reflector plate under the backlight light-guiding plate, and the reflex time light loss is little, the light that sends by effective use light source, thus improve picture brightness.And, also can be used in combination with various blast sheets.Its reflectivity is up to more than 98%, and thickness only is tens μ m.

By double-sided reflecting type reflectance coating 60 is set, can be from the light of first LGP 41 or second LGP side opposite by this double-sided reflecting type reflectance coating reflected back LGP with light-emitting window, thus improved light efficiency greatly.

What the utility model was different with traditional double-side backlight is to have adopted two light conducting plate structures and the reflector plate of a total reflection of folder in two LGPs, directly the light that goes out LGP is carried out total reflection, has reduced the loss of light, thereby has reached the purpose that improves brightness.

Claims

1. double-side backlight, comprise a glue frame, middle part at a side of glue frame, be fixed with a plurality of LED, it is characterized in that: in the glue frame, be provided with light-emitting window and point to first LGP of first direction and second LGP that light-emitting window points to the second direction opposite with first direction, light direction at first LGP and second LGP is provided with lamina membranacea, between described first LGP and second LGP, be provided with one deck double-sided reflecting type reflectance coating, utilize the high reflectance of reflectance coating to improve brightness.

2. double-side backlight according to claim 1 is characterized in that: described lamina membranacea comprise diffusion patch that mutual idol connects, down add lustre to patch, on add lustre to patch and black and white double faced adhesive tape.