CN211394345U

CN211394345U - Backlight module

Info

Publication number: CN211394345U
Application number: CN201921260910.8U
Authority: CN
Inventors: 张春; 陈建
Original assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Current assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-09-01
Anticipated expiration: 2029-08-06

Abstract

The utility model relates to a backlight module, include by lower supreme reflector plate, light guide plate, diffusion piece and the membrane of adding lustre to that sets gradually, one side of light guide plate is equipped with backlight source, backlight source includes the flexible circuit board and arranges LED lamp pearl on the flexible circuit board, be equipped with double-sided tape between light guide plate and the backlight source, double-sided tape includes the PET substrate layer, the upper surface and the lower surface of PET substrate layer are equipped with printing ink layer and white viscose layer respectively, the upper surface on printing ink layer is equipped with transparent viscose layer, transparent viscose layer with backlight source bonds, white viscose layer with the light guide plate bonds, double-sided tape corresponds LED lamp pearl has seted up a plurality of holes of dodging. The utility model discloses can improve backlight source's light utilization ratio, avoid light to take place the refraction simultaneously, guarantee the evenly distributed of light.

Description

Backlight module

Technical Field

The utility model relates to a technical field is shaded particularly, relates to a backlight unit.

Background

A backlight module (abbreviated as "Backlight (BL)") is one of the key components of a liquid crystal display (LCD panel). At present, a backlight module generally adopts a double-sided adhesive tape to attach a light source to one side of a light guide plate, and under a common condition, when light beams emitted by the light source are transmitted by the light guide plate, a considerable part of light can be lost by the double-sided adhesive tape, so that the brightness of the light source is seriously influenced. The existing scheme is that a white ink layer is arranged on one side of a double-sided tape facing a light guide plate, and light is reflected by the white ink layer to improve the efficiency of a light source. However, since the surface of the white ink layer needs to be coated with transparent glue for adhesion, when light penetrates through the transparent glue, the light is easily refracted to change the light path of the light, so that the light is not uniformly distributed, and the display effect is seriously affected.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a backlight unit can improve backlight source's light utilization ratio, avoids light to take place the refraction simultaneously, guarantees the evenly distributed of light.

The utility model provides a backlight module, includes reflector plate, light guide plate, diffusion piece and the membrane of adding lustre to that sets gradually by supreme down, one side of light guide plate is equipped with backlight source, backlight source includes the flexible circuit board and arranges LED lamp pearl on the flexible circuit board, be equipped with double sticky tape between light guide plate and the backlight source, double sticky tape includes the PET substrate layer, the upper surface and the lower surface of PET substrate layer are equipped with printing ink layer and white viscose layer respectively, the upper surface on printing ink layer is equipped with transparent viscose layer, transparent viscose layer with backlight source bonding, white viscose layer with the light guide plate bonding, double sticky tape corresponds LED lamp pearl has seted up a plurality of holes of dodging.

Further, the ink layer is a black ink layer.

Furthermore, the thickness range of the double-sided adhesive tape is 0.01 mm-0.1 mm.

Compared with the prior art, the beneficial effects of the utility model are that: set up white glue in one side of double-sided tape orientation light guide plate, satisfied adhesive demand on the one hand, on the other hand, white glue has high reflectivity, can go into the light guide plate with the light reflection of the light source in a poor light to improve the utilization ratio of light, and in-process light does not take place the refraction, can avoid producing the inhomogeneous condition of light. The side of the double-sided adhesive tape facing the backlight source is provided with the black ink layer, so that the double-sided adhesive tape has good shading performance.

Drawings

Fig. 1 is a schematic structural view of a double-sided tape in a backlight module according to the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In a preferred embodiment, the backlight module of the present invention comprises a reflector, a light guide plate, a diffuser and a brightness enhancement film sequentially arranged from bottom to top, wherein a backlight source is disposed on one side of the light guide plate, and a double-sided tape is disposed between the light guide plate and the backlight source.

As shown in fig. 1, the double-sided tape comprises a PET substrate layer 1, an ink layer 2 and a white adhesive layer 3 are respectively arranged on the upper surface and the lower surface of the PET substrate layer 1, and a transparent adhesive layer 4 is arranged on the upper surface of the ink layer 2. In this embodiment, in order to protect double-sided tape better, the upper surface of transparent adhesive layer 4 and the lower surface of white adhesive layer 3 are equipped with respectively that first from type membrane 5 and second leave type membrane 6, and during the use, peel off first from type membrane 5 and second from type membrane 6 and paste. The white adhesive layer 3 has good reflection performance, and can reflect light rays emitted by the backlight source into the light guide plate, so that the utilization rate of the light rays is improved. Because the light is directly reflected back to the light guide plate by the white adhesive layer 3, the refraction caused by penetrating media with different refractive indexes is avoided, and the phenomenon of nonuniform light distribution which is possibly generated is avoided. The preferred black printing ink layer that adopts of printing ink layer 2 to guarantee double-sided tape's shading performance, avoid light to spill and the demonstration that produces bad from the light source rear. The thickness range of double-sided tape is 0.01mm ~0.1mm, and this thickness range can guarantee that double-sided tape has sufficient adhesive strength, makes sticky tape thickness enough little simultaneously to satisfy the demand of the narrow frame of screen.

The backlight source comprises a flexible circuit board and LED lamp beads arranged on the flexible circuit board, a transparent adhesive layer 4 of the double-sided adhesive tape is bonded with the flexible circuit board, and a white adhesive layer 3 is bonded with the side face of the light guide plate, so that the backlight source is fixed on one side of the light guide plate. When the LED lamp is specifically implemented, the position of the double-sided adhesive tape corresponding to the LED lamp beads is provided with the avoiding hole so as to avoid shielding the LED lamp beads.

It should be noted that the white adhesive layer 3 may be made of an existing white adhesive material, and the ink layer 2 may be made of an existing black ink, which is not described herein again.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims

1. The utility model provides a backlight module, its characterized in that includes by lower supreme reflector plate, light guide plate, diffusion piece and the membrane of adding lustre to that sets gradually, one side of light guide plate is equipped with backlight source, backlight source includes the flexible circuit board and arranges LED lamp pearl on the flexible circuit board, be equipped with double sticky tape between light guide plate and the backlight source, double sticky tape includes the PET substrate layer, the upper surface and the lower surface of PET substrate layer are equipped with printing ink layer and white viscose layer respectively, the upper surface on printing ink layer is equipped with transparent viscose layer, transparent viscose layer with backlight source bonds, white viscose layer with the light guide plate bonds, double sticky tape corresponds LED lamp pearl has seted up a plurality of holes of dodging.

2. The backlight module as claimed in claim 1, wherein the ink layer is a black ink layer.

3. The backlight module as claimed in claim 1, wherein the double-sided tape has a thickness ranging from 0.01mm to 0.1 mm.