CN211786502U

CN211786502U - LED point-to-surface area control display screen

Info

Publication number: CN211786502U
Application number: CN202020331542.8U
Authority: CN
Inventors: 李秀富
Original assignee: Suzhou Dongyan Electronic Technology Co ltd
Current assignee: Yanheng Dongshan Precision Manufacturing Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-10-27
Anticipated expiration: 2030-03-17

Abstract

The utility model discloses a LED point-to-surface area control display screen, which comprises a PCB (printed circuit board), a plurality of LEDs, a plurality of glue frames, a plurality of diffusion glue layers and a liquid crystal panel, wherein the LEDs are uniformly distributed and pasted on the PCB, the glue frames are pasted on the PCB, and the glue frames are arranged vertically and horizontally on one surface of the PCB, which is pasted with the LEDs, so that the LEDs are respectively separated; the diffusion glue layer is filled in the space where the glue frame surrounds the LED, the liquid crystal panel is attached to one surface, far away from the PCB, of the glue frame, and pixel points in a certain area on the liquid crystal panel correspond to the LED respectively. Adopt LED point-to-surface area control display screen can effectively avoid the mutual crosstalk of light between the LED, avoids the halo problem, has effectively passed through the demonstration contrast, and is more energy-conserving.

Description

LED point-to-surface area control display screen

Technical Field

The utility model relates to a show relevant technical field, more accurate saying so relates to a LED point-to-surface area control display screen.

Background

The liquid crystal panel is a passive display device without self-luminous function, and needs to be additionally provided with a backlight module to provide a display light source required by the display panel. In the prior art, the backlight module can be divided into an edge type and a direct type according to the structure. The direct type backlight module has the characteristics of high illumination uniformity, good light-emitting visual angle, high light energy utilization rate, simple assembly structure, capability of quickly fine-tuning the brightness of a picture area so as to greatly improve the dynamic contrast and the like, and is widely applied to large-size liquid crystal displays.

A conventional direct-type LED backlight module generally includes an optical film set, a diffusion plate, a back plate and an LED circuit board; the LED backlight module provides light sources required by the liquid crystal panel by the aid of light sources emitted by the light emitting diodes on the LED circuit board. In the traditional direct type LED backlight module, if the distance between the LEDs is too large, dark areas occur among the LEDs, and the light-emitting surface of the diffusion plate has poor phenomena of uneven brightness and the like; although the reduction of the distance between the LEDs can improve the above-mentioned disadvantages, the number of the LEDs used in the direct-type LED backlight module will increase, resulting in an increase in the cost of the direct-type LED backlight module. In order to solve these problems, a plurality of films are added on the diffusion plate contained in the backlight module, or a certain light mixing distance is reserved between the LEDs and the diffusion plate, so as to alleviate the problems of lamp shadow and halo, but the thickness of the backlight module is inevitably increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a main aim at provides a LED point-to-surface area control display screen, including pasting LED's PCB board, and the PCB board pastes LED's a side and pastes gluey frame, glues the frame and separates every PCB, and it has the diffusion glue film to fill the solidification in gluey frame, glues the frame and keeps away from PCB board one side and pastes liquid crystal display panel, and every LED corresponds a part on the liquid crystal display panel alone, and mutual noninterference can realize regional accuse light through controlling each LED respectively.

In order to achieve the above object, the present invention provides a LED point-to-surface area control display screen, which comprises a PCB, a plurality of LEDs, a plurality of glue frames, a plurality of diffusion glue layers and a liquid crystal panel, wherein the plurality of LEDs are uniformly distributed and attached to the PCB, the glue frames are attached to the PCB, and the glue frames are arranged vertically and horizontally on the side of the PCB where the LEDs are attached, so as to separate the LEDs; the diffusion glue layers are respectively filled in the spaces where the glue frames surround the LEDs, and the liquid crystal panel is attached to one surface, far away from the PCB, of the glue frames.

Preferably, the pixel points of the unit area equally divided on the liquid crystal panel correspond to one of the LEDs respectively.

Preferably, each 10 × 10 pixel on the liquid crystal panel corresponds to one of the LEDs.

Preferably, the rubber frame is provided with an integrated bottom and a top, the bottom is connected with the PCB in a sticking mode, and the top is narrowed in the direction away from the PCB.

Preferably, one end of the top part, which is far away from the bottom part, is a supporting end, the width of the supporting end is the smallest whole rubber frame, and the supporting end is in contact with the liquid crystal panel.

Preferably, the diffusion glue layer is a solvent type glue with diffusion particles before curing.

Preferably, the diffusion glue layer comprises a transparent glue layer and a diffusion particle glue layer, the transparent glue layer is located at the bottom of the glue frame and covers the LED, and the diffusion particle glue layer is located at the top of the transparent glue layer and is in contact with the liquid crystal panel.

Compared with the prior art, the utility model discloses a LED point-to-surface area control display screen's advantage lies in: adopt LED point-to-surface area control display screen can effectively avoid the mutual crosstalk of light between the LED, avoids the halo problem, has effectively passed through the demonstration contrast, and is more energy-conserving.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 creative efforts.

Fig. 1 is a schematic cross-sectional view of a LED point-to-surface area control display screen according to the present invention.

Fig. 2 is a schematic view of the structure of the LED point-to-surface area control display screen after the liquid crystal panel is taken out.

Detailed Description

As shown in fig. 1 and fig. 2, the LED spot-to-face area control display screen of the present invention includes a PCB board 10, a plurality of LEDs 20, a plurality of glue frames 30, a plurality of diffusion glue layers 40, and a liquid crystal panel 50. A plurality of LED20 evenly distributed pastes the dress on the PCB board 10, glue frame 30 and paste on the PCB board 10, just glue frame 30 and be in PCB board 10 pastes the one side of LED20 is arranged with great ease, will a plurality of LED20 separates respectively, every promptly LED20 all have all around glue frame 30. The diffusion adhesive layers 40 are respectively filled in the spaces of the adhesive frame 30 surrounding the LEDs 20, and the diffusion adhesive layers 40 are dried and cured. The liquid crystal panel 50 is attached to a surface of the rubber frame 30 away from the PCB 10, the pixel points of the unit area evenly distributed on the liquid crystal panel 50 correspond to the LEDs 20 respectively, (for example, the liquid crystal panel is divided into a plurality of n × m areas, each area corresponds to one LED20) a single LED20 only irradiates the pixel point of the area, and the irradiation areas of the LEDs 20 are not overlapped. Through controlling singly respectively LED20, can control the luminance of its corresponding area liquid crystal display panel pixel, regional accuse light is effectual, is favorable to improving the contrast, and can save energy.

Preferably, each of the LEDs 20 corresponds to 10 × 10 pixels on the liquid crystal panel 50.

Specifically, the rubber frame 30 has a bottom 31 and a top 32 which are integrated, the bottom 31 is adhered to the PCB 10, the top 32 narrows in a direction away from the PCB 10, an end of the top 32 away from the bottom 31 is a support end 321, a width of the support end 321 is a minimum width of the rubber frame 30, and the support end 321 contacts the liquid crystal panel 50. Due to the structural arrangement of the rubber frame 30, the shielding of the liquid crystal panel 50 can be effectively reduced, so that the LEDs 20 can irradiate the liquid crystal panel 50 as uniformly as possible.

The diffusion glue layer 40 is solvent type glue with diffusion particles before curing, uncured glue is filled in the space of the glue frame 30 surrounding the LED20 by means of printing or glue scraping, and the diffusion glue layer 40 can be formed after drying and curing.

The diffusion adhesive layer 40 may also have a double-layer structure, including a transparent adhesive layer and a diffusion particle adhesive layer, wherein the transparent adhesive layer is located at the bottom of the adhesive frame 30 and covers the LED20, and the diffusion particle adhesive layer is located at the top of the transparent adhesive layer and contacts the liquid crystal panel 50.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An LED point-to-surface area control display screen is characterized by comprising a PCB, a plurality of LEDs, a plurality of glue frames, a plurality of diffusion glue layers and a liquid crystal panel, wherein the LEDs are uniformly distributed and attached to the PCB; the diffusion glue layers are respectively filled in the spaces where the glue frames surround the LEDs, and the liquid crystal panel is attached to one surface, far away from the PCB, of the glue frames.

2. The LED point-to-surface area control display screen of claim 1 wherein pixel points per unit area equally divided on said liquid crystal panel correspond to one of said LEDs, respectively.

3. The LED dot-to-face area control display screen of claim 2, wherein each 10 x 10 pixels on said lcd panel corresponds to a respective one of said LEDs.

4. The LED point-to-surface area control display screen of claim 1 wherein said bezel has an integral bottom portion and top portion, said bottom portion adhesively attached to said PCB, said top portion narrowing in a direction away from said PCB.

5. The LED point-to-surface area control display screen of claim 4, wherein the end of the top portion away from the bottom portion is a support end, the width of the support end is the smallest overall size of the glue frame, and the support end is in contact with the liquid crystal panel.

6. The LED point-to-surface area control display screen of claim 1 wherein the layer of diffusing glue is a solvent type glue with diffusing particles prior to curing.

7. The LED point-to-surface area control display screen of claim 1, wherein the diffusion glue layer comprises a transparent glue layer and a diffusion particle glue layer, the transparent glue layer is located at the bottom of the glue frame and covers the LEDs, and the diffusion particle glue layer is located at the top of the transparent glue layer and contacts the liquid crystal panel.