CN210488189U

CN210488189U - Backlight structure with brightening effect and display device with backlight structure

Info

Publication number: CN210488189U
Application number: CN201921054019.9U
Authority: CN
Inventors: 张春; 焦江华; 田晓星
Original assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Current assignee: SHENZHEN BAOMING TECHNOLOGY Ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-05-08
Anticipated expiration: 2029-07-08

Abstract

The utility model relates to a structure in a poor light with blast effect, including backlight unit, backlight unit's top is equipped with brightness enhancement film, brightness enhancement film includes by lower supreme first protection film, core multilayer film and the second protection film that sets up of range upon range of, the core multilayer film includes the substrate membrane of the different refracting indexes of multilayer. The utility model discloses still relate to a display device, including foretell structure and the liquid crystal display that is shaded with the blast effect, liquid crystal display locates structure's top is shaded, the brightness enhancement film is located between liquid crystal display and the structure of being shaded. The utility model discloses a set up brightness enhancement film, increase permeable liquid crystal display's lower polarization piece's light to the realization improves and shows luminance.

Description

Backlight structure with brightening effect and display device with backlight structure

Technical Field

The utility model relates to a show technical field, particularly, relate to a structure in a poor light and have its display device with blast effect.

Background

Along with the rise of the full screen mobile phone, an additional fingerprint identification module is not arranged outside the screen, and the function of the fingerprint identification module is realized through a mobile phone touch screen, which is the trend of future development. At present, most of all-screen mobile phones adopt OLED screens, and by utilizing the self-luminous characteristic of the OLED, light rays penetrate through a glass cover plate and then are reflected after meeting finger fingerprints, and are received and identified by a receiving and identifying module below the screens. The cost of the OLED screen is high, and how to realize the fingerprint identification function on the LCD screen with low cost is an urgent problem to be solved.

The existing fingerprint identification module generally adopts infrared rays for fingerprint identification, and in order to improve the penetration rate of the infrared rays, the existing scheme is to adopt an infrared-permeable material in a backlight structure, and the material can improve the penetration rate of the infrared rays but can reduce the overall brightness of the backlight structure. In addition, the conventional LCD panel includes a lower polarizer and an upper polarizer, and it is necessary to convert unpolarized light emitted from the backlight into linearly polarized light having the same polarization direction as that of the polarizers, so as to realize display on the liquid crystal screen. When the light of backlight passes through lower polarization plate, the light different with the polarization direction of lower polarization plate will be reflected, and this part of light can't get into the sight, leads to the luminance of screen display to further reduce, can't satisfy user's normal use demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a structure in a poor light and have its display device with blast effect, through setting up the brightness enhancement film, increase permeable liquid crystal display's light, realize improving the purpose that shows luminance.

A backlight structure with a brightening effect comprises a backlight module, wherein a brightening film is arranged above the backlight module and comprises a first protective film, a core multilayer film and a second protective film which are stacked from bottom to top, and the core multilayer film comprises a plurality of layers of base material films with different refractive indexes.

Furthermore, the number of the base material films is 300-400, and the refractive index of each layer of the base material film is 1.3-1.85.

Further, the first protective film layer and the second protective film layer comprise polycarbonate film layers.

Furthermore, the backlight module comprises a reflecting sheet, a light guide plate and a diffusion sheet which are sequentially arranged from bottom to top, and a backlight source is arranged on one side of the light guide plate.

Furthermore, the backlight source comprises a flexible circuit board and LED lamp beads attached to the flexible circuit board.

The utility model also provides a display device, including foretell structure and the liquid crystal display that is shaded with the blast effect, liquid crystal display locates structure's top is shaded, the brightness enhancement film is located between liquid crystal display and the structure of being shaded.

Further, the liquid crystal display screen comprises a lower polarizer, a liquid crystal panel and an upper polarizer which are stacked from bottom to top.

The utility model has the advantages that: in the prior art, light rays which are not matched with the polarization direction of the liquid crystal display screen can be repeatedly reflected and consumed between the lower polaroid and the light guide plate, and cannot enter a visual area. The utility model discloses set up brightness enhancement film in backlight unit's top, brightness enhancement film includes the core multilayer film, and this core multilayer film is laminated by the substrate membrane of the different refracting indexes of multilayer and forms for above-mentioned light changes its direction of polarization through the refraction of core multilayer film at the in-process of repeated reflection, makes this part light's direction of polarization become unanimous with the direction of polarization of lower polarization piece, thereby has improved the throughput of light, improves the demonstration luminance of visual area.

Drawings

Fig. 1 is a schematic structural view of a backlight structure with a brightness enhancement effect according to the present invention.

Fig. 2 is a schematic structural view of a brightness enhancement film with a backlight structure having a brightness enhancement effect according to the present invention.

Fig. 3 is a schematic structural diagram of the display device of 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.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and fig. 2, in a preferred embodiment, the backlight structure with brightness enhancement effect of the present invention mainly includes a backlight module 1 and a brightness enhancement film 2, wherein the brightness enhancement film 2 is disposed above the backlight module 1. The backlight module 1 includes a reflector 11, a light guide plate 12, and a diffuser 13 sequentially arranged from bottom to top, and one side of the light guide plate 12 is provided with a backlight 14, in this embodiment, the backlight 14 includes a Flexible Printed Circuit (FPC) and LED lamp beads attached to the FPC.

The brightness enhancement film 2 includes a first protective film 21, a core multilayer film 22, and a second protective film 23, which are stacked from bottom to top. The core multilayer film 22 includes a plurality of substrate films 24 of different refractive indices. The core multilayer film 22 may refract light multiple times, thereby changing the polarization direction of the light. In specific implementation, the number of the base material films 24 may be 300 to 400, and the refractive index of each base material film 24 is 1.3 to 1.85.

In the present embodiment, the first protective film 21 and the second protective film 23 are Polycarbonate films (PC films).

Referring to fig. 3, the present invention further provides a display device, which includes the above-mentioned backlight structure with brightness enhancement effect, and a liquid crystal display 3. The liquid crystal display screen 3 is arranged above the backlight module 1, and the brightness enhancement film 2 is arranged between the liquid crystal display screen 3 and the backlight module 1. The liquid crystal display panel 3 includes a lower polarizer 31, a liquid crystal panel 32, and an upper polarizer 33 stacked from bottom to top.

The utility model discloses a theory of operation is: in the prior art, an LCD (Liquid Crystal Display) mainly uses the polarization performance of light to Display images and characters, and generally includes a lower polarizer 31, a Liquid Crystal panel 32, and an upper polarizer 33, where the lower polarizer 31 and the upper polarizer 33 are both provided with polarization axes, the polarization axes of the two are perpendicular to each other, that is, the phase difference is 90 °, the polarization axes are used to set the polarization direction, and only the light with the same polarization direction as the polarization axes can pass through. The light emitted from the backlight 14 sequentially passes through the reflective sheet 11, the light guide plate 12, and the diffusion sheet 13 and reaches the lower polarizer 31, only the light with the same polarization direction as that of the lower polarizer 31 can pass through the light, and the light with the different polarization direction from that of the lower polarizer 31 is reflected, and the light is repeatedly reflected between the light guide plate 12 and the lower polarizer 31, and finally consumed and cannot reach the viewing area. The utility model discloses set up brightness enhancement film 2 between backlight unit 1 and liquid crystal display 3, brightness enhancement film 2 includes core multilayer film 22, and this core multilayer film 22 is formed by the 24 range upon range of substrate films of the different refracting indexes of multilayer for above-mentioned light changes its polarization direction at the in-process of repeated reflection through the refraction of core multilayer film 22, makes this part of light's polarization direction become unanimous with the polarization direction of polarization piece 31 down. The inconsistent light rays are reflected and refracted again, and the process is repeated until the inconsistent light rays pass through the lower polarizing plate 31, so that the total throughput of the light rays is increased, and the display brightness of the visual area is improved.

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. A backlight structure with a brightening effect comprises a backlight module and is characterized in that a brightening film is arranged above the backlight module and comprises a first protective film, a core multilayer film and a second protective film which are stacked from bottom to top, wherein the core multilayer film comprises a plurality of layers of substrate films with different refractive indexes.

2. The backlight structure with brightness enhancement effect as claimed in claim 1, wherein the number of the substrate films is 300 to 400, and the refractive index of each substrate film is 1.3 to 1.85.

3. The backlight structure with brightness enhancement effect of claim 1, wherein the first and second protective film layers comprise polycarbonate film layers.

4. The backlight structure with brightness enhancement effect as claimed in claim 1, wherein the backlight module comprises a reflector plate, a light guide plate, and a diffuser plate sequentially arranged from bottom to top, and a backlight source is disposed at one side of the light guide plate.

5. The backlight structure with brightness enhancement effect as claimed in claim 4, wherein the backlight source comprises a flexible circuit board and LED lamp beads attached to the flexible circuit board.

6. A display device, comprising the backlight structure with brightness enhancement effect as claimed in any one of claims 1 to 4 and a liquid crystal display, wherein the liquid crystal display is disposed above the backlight module, and the brightness enhancement film is disposed between the liquid crystal display and the backlight module.

7. The display device according to claim 6, wherein the liquid crystal display panel comprises a lower polarizer, a liquid crystal panel, and an upper polarizer, which are stacked from bottom to top.