CN211403033U

CN211403033U - Liquid crystal screen backlight source

Info

Publication number: CN211403033U
Application number: CN201922246574.8U
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 liquid crystal display backlight, including base plate, light guide plate, diffuser plate, PCB lamp plate and shading frame, the base plate simultaneously is provided with open storage tank, the storage tank is equipped with the draw-in groove, the draw-in groove sets up with the bar lug cooperation of locating the light guide plate side, storage tank one side is provided with the bar groove, install in the bar groove the PCB lamp plate, light guide plate and PCB lamp plate upper surface are equipped with this diffuser plate, follow the diffuser plate edge part is equipped with the shading frame, be equipped with the clearance groove on the light guide plate, the clearance groove with PCB lamp plate cooperation sets up, the clearance groove is used for keeping away the sky and locates LED lamp pearl and resistance on the PCB lamp plate. Implement the utility model discloses a backlight structure adopts the storage tank bottom surface of support as the reflector panel, and electrode pin simple to operate, luminous diffusion is even, and the leakproofness is good, has avoided the light leak, consequently, and the product percent of pass is high, low in production cost.

Description

Liquid crystal screen backlight source

Technical Field

The utility model relates to a show liquid crystal display's backlight technical field, in particular to liquid crystal display backlight.

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 are relatively complex in assembly, uneven in light emission, poor in sealing performance, prone to light leakage, and prone to affecting product yield, and therefore production cost is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a can realize the power supply of pegging graft of electrode pin, convenient assembling, the leakproofness is good, is difficult for producing the light leak, LCD screen backlight with low costs.

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

the utility model discloses a liquid crystal display backlight, including base plate, light guide plate, diffuser plate, PCB lamp plate and shading frame, the base plate simultaneously is provided with open storage tank, the storage tank is equipped with the draw-in groove, the draw-in groove sets up with the bar lug cooperation of locating the light guide plate side, storage tank one side is provided with the bar groove, install in the bar groove the PCB lamp plate, light guide plate and PCB lamp plate upper surface are equipped with this diffuser plate, follow the diffuser plate edge part is equipped with the shading frame, be equipped with the clearance groove on the light guide plate, the clearance groove with PCB lamp plate cooperation sets up, the clearance groove is used for keeping away the sky and locates LED lamp pearl and resistance on the PCB lamp plate.

Further, the PCB lamp plate is provided with positive and negative electrode pins, and the positive and negative electrode pins pass through and are arranged on the electrode through holes on the substrate and are connected with an external power supply.

Furthermore, the two ends of the accommodating groove are provided with convex blocks, and the convex blocks are used for correspondingly assembling the light guide plate and the accommodating groove.

Further, LED lamp pearl light emitting area sets up with the laminating of light guide plate side.

Further, the light guide plate is made of acrylic materials and is processed and molded.

Further, the substrate is formed by injection molding of PC plastic.

Implement the utility model discloses a liquid crystal display backlight has following profitable technological effect:

implement the utility model discloses a backlight structure adopts the storage tank bottom surface of support as the reflector panel, and electrode pin simple to operate, luminous diffusion is even, and the leakproofness is good, has avoided the light leak, consequently, 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 a liquid crystal display backlight according to the present invention;

FIG. 2 is a schematic view of the plane A-A in FIG. 1;

FIG. 3 is a schematic diagram of a front structure of a substrate in a liquid crystal display backlight according to the present invention;

FIG. 4 is a schematic view of the reverse structure of the substrate shown in FIG. 3;

fig. 5 is a schematic view of a front structure of a light guide plate in a liquid crystal display backlight according to the present invention;

FIG. 6 is a schematic view of a reverse structure of the light guide plate shown in FIG. 5;

fig. 7 is the utility model relates to a PCB lamp plate structure schematic diagram in LCD screen backlight.

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 7, an embodiment of the present invention provides a liquid crystal display backlight source 100, including a substrate 1, a light guide plate 2, a diffusion plate 3, a PCB lamp plate 4 and a shading frame 5, wherein the substrate 1 is provided with an open storage tank 11, the storage tank 11 is provided with a clamping groove 12, the clamping groove 12 is arranged in cooperation with a bar-shaped projection 21 arranged on the side of the light guide plate 2, the storage tank 11 is provided with a bar-shaped groove 13 on one side, the PCB lamp plate 4 is arranged in the bar-shaped groove 13, the upper surface of the light guide plate 2 and the PCB lamp plate 4 is provided with the diffusion plate 3, the shading frame 5 is arranged along the edge portion of the diffusion plate 3, a clearance groove 22 is arranged on the light guide plate 2, the clearance groove 22 is arranged in cooperation with the PCB.

According to one embodiment, the PCB lamp panel 4 is provided with positive and negative electrode pins 41, and the positive and negative electrode pins 41 pass through the electrode through holes on the substrate 1 to be connected to an external power supply.

According to one embodiment, the receiving groove 11 is provided with a protrusion 14 at two ends, and the protrusion 14 is used for assembling the light guide plate 2 and the receiving groove 11 correspondingly.

According to one embodiment, the light emitting surface of the LED lamp bead is attached to the side surface of the light guide plate 2.

According to one embodiment, the light guide plate 2 is made of acrylic material.

According to one embodiment, the substrate 1 is injection molded of PC plastic.

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

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 liquid crystal display backlight, includes base plate, light guide plate, diffuser plate, PCB lamp plate and shading frame, the base plate one side is provided with open storage tank, the storage tank is equipped with the draw-in groove, the draw-in groove sets up with the cooperation of the bar lug of locating the light guide plate side, storage tank one side is provided with the bar groove, install in the bar groove the PCB lamp plate, light guide plate and PCB lamp plate upper surface are equipped with this diffuser plate, follow the diffuser plate edge part is equipped with the shading frame, its characterized in that, be equipped with the evacuation groove on the light guide plate, the evacuation groove with PCB lamp plate cooperation sets up, the evacuation groove is used for keeping away the sky and locates LED lamp pearl and resistance on the.

2. The liquid crystal display backlight source of claim 1, wherein the PCB lamp panel is provided with positive and negative electrode pins, and the positive and negative electrode pins penetrate through electrode through holes formed in the substrate and are connected with an external power supply.

3. The liquid crystal display backlight source according to claim 1, wherein two ends of the receiving groove are provided with protrusions, and the protrusions are used for assembling the light guide plate and the receiving groove correspondingly.

4. The liquid crystal screen backlight source of claim 1, wherein the light emitting surface of the LED lamp bead is attached to the side surface of the light guide plate.

5. The liquid crystal display backlight source of claim 1, wherein the light guide plate is formed of acrylic material.

6. The liquid crystal screen backlight source of claim 1, wherein the substrate is injection molded of PC plastic.