CN217767131U

CN217767131U - Backlight bracket structure for partition control type liquid crystal screen

Info

Publication number: CN217767131U
Application number: CN202221773381.3U
Authority: CN
Inventors: 王志东
Original assignee: Yanfeng Visteon Electronic Technology Shanghai Co Ltd
Current assignee: Yanfeng Visteon Electronic Technology Shanghai Co Ltd
Priority date: 2022-07-11
Filing date: 2022-07-11
Publication date: 2022-11-08
Anticipated expiration: 2032-07-11

Abstract

A backlight bracket structure for a partition control type liquid crystal screen comprises a PCB, wherein a plurality of LED lamps are arranged on the PCB, a reflecting cup is arranged on the upper side of any one LED lamp, a diffusion film is arranged at the cup opening of the reflecting cup, a brightness enhancement film is arranged on the upper side of the diffusion film, a brightness enhancement film is arranged on the upper side of the brightness enhancement film, and a liquid crystal screen 7 is arranged on the upper side of the brightness enhancement film; the reflecting cup is divided into a plurality of annular reflecting belts from inside to outside, and included angles between the reflecting belts and the PCB are sequentially increased from inside to outside. Compared with the prior art, the beneficial effects of the utility model are that: the LED height is reduced by 20% while maintaining the same uniformity.

Description

Backlight bracket structure for partition control type liquid crystal screen

Technical Field

The utility model relates to a physics field especially relates to liquid crystal display equipment, especially a supporting structure is shaded for partition control formula LCD screen.

Background

Local dimming, namely a partition control technology, is a structural mode commonly used for a liquid crystal display at present. The liquid crystal display screen is shaded and is adopted LED matrix and reflection cup, above cover 0.5-1.5 mm's diffuser plate, for further preventing luminous inhomogeneous, still need add the diffusion barrier above the diffuser plate, still need add the fluorescent coating for increasing the colour gamut, for increasing luminance, still need add one to two layers of membrane of adding on the diffusion barrier, add the brightness enhancement membrane above the membrane of adding and cooperate with the liquid crystal display screen and increase luminance. To achieve high uniformity, larger thickness is required and larger LEDs are needed to achieve better uniformity. The development requirements of low cost, ultra-thin and high uniformity cannot be realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a supporting structure in a poor light for partition control formula LCD screen, this kind of supporting structure in a poor light for partition control formula LCD screen, the not ideal technical problem of structural cost height, thickness, the illumination homogeneity in a poor light of LCD screen among the prior art will be solved.

In order to achieve the above object, the present invention provides the following technical solutions:

a backlight bracket structure for a partition control type liquid crystal screen comprises a PCB, wherein a plurality of LED lamps are arranged on the PCB, a reflecting cup is arranged on each of the upper sides of any LED lamp, a diffusion film is arranged at the cup opening of the reflecting cup, a brightness enhancement film is arranged on the upper side of the diffusion film, a brightness enhancement film is arranged on the upper side of the brightness enhancement film, and a liquid crystal screen is arranged on the upper side of the brightness enhancement film; the reflecting cup is divided into a plurality of conical reflecting belts, the tangent line of the inner wall of each reflecting belt and the plane of the PCB form a reflecting included angle, and the reflecting included angles of the reflecting belts from the inner side to the outer side are sequentially increased.

Furthermore, the number of the reflection bands is six.

Further, the brightness enhancement film is a DEBF film.

Furthermore, the LED lamps are arranged on the PCB in a matrix manner.

The working principle is as follows: the plurality of reflecting surfaces are formed by the plurality of reflecting belts to distribute light to the specific large-angle light-emitting LED, so that the distance between the LEDs can be increased under the condition of ensuring the uniformity, the using amount of the LEDs is reduced, and the height of the LEDs is reduced.

Compared with the prior art, the beneficial effects of the utility model are that: the LED height is reduced by 20% while maintaining the same uniformity.

Drawings

Fig. 1 is a schematic structural diagram of a backlight bracket structure for a partition control type lcd panel according to the present invention.

Fig. 2 is a schematic structural diagram of a reflective cup of a backlight bracket structure for a partition control type lcd panel according to the present invention.

Fig. 3 is a schematic diagram of a matrix arrangement of a backlight bracket structure for a partition-controlled liquid crystal display according to the present invention.

Fig. 4 is a schematic diagram of the general light intensity distribution of the LED lamp of the present invention.

Detailed Description

Example 1

Referring to fig. 1, 2 and 3, the present invention provides a technical solution:

a backlight bracket structure for a partition control type liquid crystal screen comprises a PCB (printed circuit board) 1, wherein a plurality of LED lamps 2 are arranged on the PCB 1, a reflection cup 3 is arranged on each upper side of any one LED lamp 2, a diffusion film 4 is arranged at the cup opening of the reflection cup 3, a brightness enhancement film 5 is arranged on the upper side of the diffusion film 4, a brightness enhancement film 6 is arranged on the upper side of the brightness enhancement film 5, and a liquid crystal screen 7 is arranged on the upper side of the brightness enhancement film 6; the reflecting cup 3 is divided into a plurality of conical reflecting belts 301, the tangent line of the inner wall of the reflecting belt 301 and the plane of the PCB 1 form reflecting included angles, and the reflecting included angles of the reflecting belts 301 from the inner side to the outer side are increased in sequence.

Further, the number of the reflection bands 301 is six.

Further, the brightness enhancement film 6 is a DEBF film.

Further, the LED lamps 2 are arranged in a matrix on the PCB board 1.

The working process of the embodiment is as follows:

taking the example of using six segments of reflection bands 301, the reflection bands 301 of the reflection cup 3 are marked as a reflection band P6, a reflection band P5, a reflection band P4, a reflection band P3, a reflection band P2, and a reflection band P1 in sequence from the inside to the outside, and the included angles between the reflection bands 301 and the PCB are a reflection band P6< a reflection band P5< a reflection band P4< a reflection band P3< a reflection band P2< a reflection band P1.

As shown in FIG. 4, FIG. 4 is a light intensity distribution graph of a low cost LED lamp, where φ I represents an angle, I _rel The LED lamp has the advantages that the intensity is shown, the intensity 1 is set to be the maximum value of the light intensity in the direction, the relation of the light intensity obtained under different angles can be obtained, the LED lamp has large light emitting angle (minus or plus 30 degrees to minus or plus 90 degrees), the cost is low, and the using amount of the LED lamp can be reduced by increasing the distance between the LED lamps under the condition of ensuring the uniformity. The utility model discloses a reflection cup that 301 is constituteed is taken in reflection of multistage formula becomes a plurality of plane of reflection in one section straight line of general reflection cup or one section curved form, and the plane of reflection of every reflection area 301 is according to the luminous of LED lamp, adjusts the light-emitting light intensity that length, face type and the angle of every face mate the LED lamp, through optimizing 6 planes of reflection, and the light-emitting homogeneity reaches more than 85, and the high reduction 20%. Under the condition of keeping the original height, the interval between the LED lamps can be increased by 2mm, so that the using amount of the whole LED is reduced.

Claims

1. The utility model provides a supporting structure is shaded for partition control formula LCD screen, includes one PCB board (1), is provided with a plurality of LED lamp (2) on PCB board (1), its characterized in that: the upper side of any one LED lamp (2) is respectively provided with a reflecting cup (3), the cup opening of the reflecting cup (3) is provided with a diffusion film (4), the upper side of the diffusion film (4) is provided with a brightness enhancement film (5), the upper side of the brightness enhancement film (5) is provided with a brightness enhancement film (6), and the upper side of the brightness enhancement film (6) is provided with a liquid crystal screen (7); the reflecting cup (3) is divided into a plurality of conical reflecting belts (301), the tangent line of the inner wall of each reflecting belt (301) and the plane of the PCB (1) form a reflecting included angle, and the reflecting included angles of the reflecting belts (301) from the inner side to the outer side are sequentially increased.

2. The backlight bracket structure for the zone control type liquid crystal screen according to claim 1, wherein: the number of the reflection bands (301) is six.

3. The backlight bracket structure for the zone control type liquid crystal screen according to claim 1, wherein: the brightness enhancement film (6) is a DEBF film.

4. The backlight bracket structure for the zone control type liquid crystal screen according to claim 1, wherein: the LED lamps (2) are arranged on the PCB (1) in a matrix manner.