CN211403034U

CN211403034U - LED backlight source structure

Info

Publication number: CN211403034U
Application number: CN201922246618.7U
Authority: CN
Inventors: 刘勇
Original assignee: Shenzhen Jianjie Photoelectric Co ltd
Current assignee: Shenzhen Jianjie Photoelectric Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-01
Anticipated expiration: 2029-12-16

Abstract

The utility model provides a LED backlight structure, including light guide plate, reflecting plate and diffuser plate, diffuser plate and reflecting plate are located respectively the upper and lower surface of light guide plate, light guide plate one side is equipped with the bar groove, the bar groove sets up with the cooperation of PCB board, LED lamp pearl has on the PCB board, LED lamp pearl with locate the arc wall cooperation of bar groove one side sets up, still be equipped with the through-hole on the PCB board, the through-hole with locate projection looks accordant connection on the light guide plate, the PCB board is equipped with the light shield layer that is used for the leak protection light with the light guide plate junction. Implement the utility model discloses a LED backlight structural design is compact, exempts from screw assembly, and the leakproofness is good, has avoided the light leak, and luminous diffusion is even, and the product percent of pass is high, low in production cost.

Description

LED backlight source structure

Technical Field

The utility model relates to a backlight technical field of LCD screen, in particular to LED backlight structure.

Background

The so-called BackLight (BackLight) is a light source located behind a Liquid Crystal Display (LCD), the lighting effect of which will directly affect the visual effect of the liquid crystal display module, the liquid crystal itself does not emit light, and it displays graphics or characters as a result of its modulation of light. The liquid crystal display is a passive light-emitting element, the display screen does not emit light, but is illuminated by a backlight system below the display screen, and the backlight source and the liquid crystal display screen are combined to form a liquid crystal display module. The liquid crystal backlight is a planar uniform lighting device, and cold cathode fluorescent lamps or LED lamp strips serving as light sources are arranged on two sides or one side of the whole backlight source. The cold cathode fluorescent lamp is a linear light source, the LED is a point light source, a light guide plate is needed for converting the light source into a surface light source, the light guide plate is generally made of acrylic plastic with high light transmittance, the surface is very smooth and flat, so that most of internal light rays are regularly and totally reflected on the flat surface, but not to be emitted to the outside of the light guide plate, the bottom of the light guide plate of the liquid crystal display is printed with white lattice points, the light rays are not regularly reflected totally but emitted to the upper part of the light guide plate at the positions of the light guide plate printed with the mesh points, the quantity of the light rays emitted by the light guide plate at the positions can be controlled by controlling the density of the mesh points at each position, the light rays incident from two sides can be uniformly spread on the whole plane by the precisely designed mesh points of the light guide plate, optical films are arranged above the light guide plate, the optical films play a role in uniform light rays and converge large-angle light for frontal observation and the like.

The backlight source plays a crucial role in the production yield and the display effect of the liquid crystal display. However, most backlight sources have complicated installation and fixing processes, uneven light emission, poor sealing performance, easy side light leakage and high production cost, and the product yield is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a can realize exempting from the screw fixation, convenient assembling, the leakproofness is good, is difficult for producing the LED backlight structure of side light leak.

The technical scheme of the utility model is realized like this:

the utility model discloses a LED backlight structure, including light guide plate, reflecting plate and diffuser plate, diffuser plate and reflecting plate are located respectively the upper and lower surface of light guide plate, light guide plate one side is equipped with the bar groove, the bar groove sets up with the cooperation of PCB board, LED lamp pearl has on the PCB board, LED lamp pearl with locate the arc wall cooperation of bar groove one side sets up, still be equipped with the through-hole on the PCB board, the through-hole with locate projection looks accordant connection on the light guide plate, the PCB board is equipped with the light shield layer that is used for the leak protection light with the light guide plate junction.

Furthermore, the light guide plate is provided with a light shielding film along the outer side, and the light shielding film is tightly attached to the outer side of the light guide plate through an adhesive layer and used for preventing side light leakage.

Furthermore, four support columns extend towards one side of four corners of the light guide plate, and the height of each support column is the same.

Further, the section of the light guide plate is of a rectangular structure and is made of acrylic materials.

Further, the PCB is of a double-T-shaped structure, and a positive electrode and a negative electrode are arranged in an extending mode.

Implement the utility model discloses a LED backlight structure has following profitable technological effect:

be different from in the existing market that the backlight is comparatively complicated, the installation is inconvenient, easily produces the problem of light leak, implements the utility model discloses a power structural design is compact in a poor light, exempts from screw assembly, and convenient assembling, and the leakproofness is good, and luminous diffusion is even, has avoided the side light leakage, and the product percent of pass is high, low in production cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic front structural view of an LED backlight structure according to the present invention;

FIG. 2 is a schematic view of the backside structure of FIG. 1;

FIG. 3 is a schematic side view of the structure of FIG. 1;

FIG. 4 is a schematic view of a light guide plate structure in an LED backlight structure according to the present invention;

FIG. 5 is a schematic view of another structure of the light guide plate in the LED backlight structure of the present invention;

fig. 6 is a schematic diagram of a PCB board structure in an LED backlight structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1 to 6, an embodiment of the utility model provides a LED backlight structure, including light guide plate 1, reflecting plate 2 and diffuser plate 3, diffuser plate 3 and reflecting plate 2 locate the upper and lower surface of light guide plate 1 respectively, 1 one side of light guide plate is equipped with bar groove 4, bar groove 4 sets up with the cooperation of PCB board 5, LED lamp pearl 51 has on PCB board 5, LED lamp pearl 51 sets up with the cooperation of the arc wall 6 of locating bar groove 4 one side, still be equipped with through-hole 52 on PCB board 5, through-hole 52 with locate the projection 11 phase-match connection on the light guide plate 1, PCB board 5 is equipped with the light shield layer 7 that is used for the leak protection light with 1 junction of light guide plate.

According to one embodiment, the light guide plate 1 is provided with a light shielding film 8 along the outer side, the light shielding film 8 is tightly attached to the outer side of the light guide plate 1 through an adhesive layer and used for preventing side light leakage, and the light shielding film 8 is a metal aluminum foil.

According to one embodiment, four supporting columns 9 extend from four corners of the light guide plate 1 to one side, and the heights of the supporting columns 9 are the same.

According to one embodiment, the light guide plate 1 has a rectangular cross section and is made of acrylic material.

According to one embodiment, the PCB 5 has a double T-shaped structure, and a positive electrode 53 and a negative electrode 54 extend from the PCB, wherein the positive electrode 53 and the negative electrode 54 are connected to the positive and negative poles of the power supply.

implement the utility model discloses a power structural design is compact in a poor light, exempts from screw assembly, and convenient assembling, and the leakproofness is good, and luminous diffusion is even, has avoided the side leakage light, and the product percent of pass is high, low in production cost.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a LED backlight structure, includes light guide plate, reflecting plate and diffuser plate, diffuser plate and reflecting plate are located respectively the upper and lower surface of light guide plate, its characterized in that, light guide plate one side is equipped with the bar groove, the bar groove sets up with the cooperation of PCB board, LED lamp pearl has on the PCB board, LED lamp pearl with locate the arc wall cooperation of bar groove one side sets up, still be equipped with the through-hole on the PCB board, the through-hole with locate projection looks accordant connection on the light guide plate, the PCB board is equipped with the light shield layer that is used for the leak protection light with the light guide plate junction.

2. The LED backlight structure of claim 1, wherein the light guide plate is provided with a light shielding film along an outer side, and the light shielding film is closely attached to the outer side of the light guide plate through an adhesive layer and used for preventing side light leakage.

3. The LED backlight structure as claimed in claim 1, wherein four support columns extend from four corners of the light guide plate to one side, and the support columns have the same height.

4. The LED backlight structure of claim 1, wherein the light guide plate has a rectangular cross section and is made of acrylic material.

5. The LED backlight structure as claimed in claim 1, wherein the PCB has a double T-shaped structure and extends to form a positive electrode and a negative electrode.