CN217740099U

CN217740099U - Dress type display screen structure and display screen in a poor light

Info

Publication number: CN217740099U
Application number: CN202220394175.5U
Authority: CN
Inventors: 温武炎; 曾焕章
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-11-04
Anticipated expiration: 2032-02-25

Abstract

The utility model relates to a wearable display screen backlight structure and a display screen, wherein the backlight structure comprises a back plate, a light guide plate, a LED light source and a FPC; the LED light source is positioned on the light incident side of the light guide plate and is electrically connected with the FPC; the back plate is arranged on one side of the non-light-emitting surface of the light guide plate; the back plate comprises a silver reflecting sheet and a black PET substrate layer. The black PET substrate layer has high hardness, the thickness of the black PET substrate layer is 0.1-0.15mm, the visible light transmittance is less than 1%, and the dielectric loss factor is 0.2-0.3%. Still including gluing the frame, glue frame and FPC and black PET substrate layer adhesive bonding. The front surface of the light guide plate is provided with a diffusion film, diffusion particles are arranged in the diffusion film, and light rays emitted by the light guide plate can be diffused through the diffusion film. Front side of diffusion film is provided with a brightness enhancement film, the front surface of the brightness enhancement film is provided with a shading film. The utility model discloses a backplate includes silver reflector plate and black PET substrate layer, has improved the bad problem of traditional structure display facula in a poor light, and the silver reflector plate is compared with traditional white reflector plate simultaneously, and the reflection effect is better, has improved the luminance of backplate.

Description

Dress type display screen structure and display screen in a poor light

Technical Field

The utility model belongs to dress type module field, concretely relates to dress type display screen backlight structure and display screen.

Background

The traditional commonly used backlight structure of display module assembly trade is dressed at present, and the bottom of being shaded is white reflector plate or is the integrative structure of glued iron, and the product of taking the NFC function can't use the integrative structure of being shaded of glued iron, and this just makes the structure module FPC of white reflector plate buckle and paste the back of being shaded, and white reflector plate receives FPC stress influence, and it is bad to correspond the position display facula to appear easily, and reprocesses the yield and also very low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses problem to exist among the above-mentioned prior art improves, promptly the to-be-solved technical problem the utility model is to provide a dress type display screen structure in a poor light after the improvement and contain its display screen, it is bad to improve the display spot, improves the repair yield.

In order to solve the technical problem, the technical scheme of the utility model is that: a wearable display screen backlight structure comprises a back plate, a light guide plate, an LED light source and an FPC; the LED light source is positioned on the light incident side of the light guide plate and is electrically connected with the FPC; the back plate is arranged on one side of the non-light-emitting surface of the light guide plate; the back plate comprises a silver reflecting sheet and a black PET substrate layer, and the transverse and longitudinal fracture elongation of the black PET substrate layer is 110-130%.

As a preferred technical embodiment, the thickness of the black PET substrate layer is 0.1-0.15mm.

As a preferred technical embodiment, the visible light transmittance of the black PET substrate layer is less than 1%.

As a preferred technical embodiment, the dielectric loss factor of the black PET substrate layer is 0.2-0.3%.

As a preferred technical embodiment, the silver reflective sheet is positioned between the light guide plate and the black PET substrate layer.

As the preferred technical implementation scheme, still include the frame of gluing, glue frame and FPC and black PET substrate layer adhesive bonding.

In a preferred embodiment, the light guide plate has a diffusion film on the front surface thereof, and the diffusion film has diffusion particles therein, so that light emitted from the light guide plate can be diffused by the diffusion film.

In a preferred embodiment, the front surface of the diffusion film is provided with a brightness enhancement film, and the number of the brightness enhancement films is 1 or 2.

In a preferred embodiment, the front surface of the brightness enhancement film is provided with a light-shielding film.

The utility model also provides a dress type display screen, including foretell a dress type display screen structure in a poor light.

The utility model discloses for prior art gain following technological effect: (1) The back plate comprises a silver reflector plate and a black PET substrate layer, the black PET substrate layer is high in hardness, bright and smooth in surface, uniform in color and good in dimensional stability at high temperature, the FPC (flexible printed circuit) of the display module is bent and fixed to the back surface, structural deformation is not prone to occurring, and the problem of poor display light spots of the backlight structure is solved; (2) Compared with the traditional white reflector, the silver reflector has better reflection effect and improves the brightness of the back plate.

Drawings

Fig. 1 is a schematic view of a wearable display screen backlight structure provided in embodiment 1 of the present invention;

fig. 2 is a schematic view of a display screen structure provided in embodiment 2 of the present invention.

Description of the reference numerals

1-a light guide plate; 2-LED lamplight; 3-FPC; 4-a back plate; 41-black PET substrate layer; 42-silver reflective flakes; 5-glue frame; 6-a diffusion membrane; 7-a first brightness enhancement film; 8-a second brightness enhancement film; 9-a light-shielding film; 10-single-sided black mylar; 11-a display screen; 12-a drive IC; 13-a second FPC; 14-third FPC.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "back" and "front" and the like refer to the orientation or position relationship based on the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, or the orientation or position relationship that the person skilled in the art conventionally understands, and the description is only for convenience of description and simplification of the present invention, and does not refer to or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the present invention.

The utility model provides a dress type display screen backlight structure and contain its display screen, solved the technical problem that exists in the prior art background, mainly improved the backplate of backlight structure, solved the condition that bad facula appears after display module assembly FPC buckles to be shaded that exists in the prior art; an example of a display screen comprising such a backlight structure is also given. Specifically, as in example 1 and example 2.

Example 1

As shown in FIG. 1, the utility model provides a dress type display screen structure sketch map in a poor light, including light guide plate 1, LED lamp light source 2 is located the income light side of light guide plate 1, still includes FPC3, and FPC3 passes through the electricity with LED lamp light source 2 and is connected. The back plate 4 is arranged on one side of the non-light-emitting surface of the light guide plate 1, and the back plate 4 comprises a black PET substrate layer 41 and a silver reflecting sheet 42.

Preferably, the thickness of the black PET substrate layer 41 is 0.1-0.15mm, the visible light transmittance is less than 1%, and the dielectric loss factor is 0.2-0.3%. The black PET substrate layer 41 has high hardness, the transverse and longitudinal elongation at break is 110-130%, the surface is bright and smooth, the color is uniform, the dimensional stability at high temperature is good, and the FPC (flexible printed circuit) of the display module is bent and fixed on the back of the backlight and is not easy to deform.

The backplate 4 includes black PET substrate layer 41 and silver-colored reflector plate 42, can overcome and paste at the back of being shaded after the reverse book of display module assembly FPC, shows the bad problem of facula.

Preferably, the silver reflective sheet 42 is positioned between the light guide plate 1 and the black PET substrate layer 41. The silver color reflecting sheet 42 reflects the light exiting from the back surface of the light guide plate 1 back to the light guide plate 1 for reuse, so that the light exits from the front surface. This affects the brightness and chromaticity of the backlight due to the different reflectance of different reflective films for different wavelengths of light. The reflection effect of the silver reflector 42 in this embodiment is greatly improved compared to the conventional white reflector.

Preferably, the light guide plate 1 is designed by using microstructures with different densities and sizes, and mainly functions to conduct light emitted by the LED light source 2 and enable the light to uniformly emit light in a specific direction, so as to achieve a light guide effect. The material of the light guide plate 1 is generally optical grade PC and PMMA material.

Preferably, still include and glue frame 5, glue frame 5 and FPC3 and black PET substrate layer 41 pass through adhesive bonding, glue frame 5 mainly plays the supporting role and the effect of reflection light guide plate 1 light in the structure of being shaded.

The front surface of the light guide plate 1 is also provided with a diffusion film 6, diffusion particles are arranged in the diffusion film 6, and the light rays coming out of the light guide plate 1 are diffused by the diffusion particles to be more uniform. Generally, the light source has a vertical diffusion component, and the vertical diffusion component can be replaced by a top bright enhancement film with frosting.

The first brightness enhancement film 7 is provided on the front surface of the diffusion film 6, and the second brightness enhancement film 8 is provided on the front surface of the first brightness enhancement film 7, wherein the number of brightness enhancement films is 2 in this embodiment, and in other embodiments, the number of brightness enhancement films may be 1. The brightness enhancement film generally comprises three types of BEF, DBEF and BEF-RP. The BEF structure is formed by coating sawtooth or wavy PMMA microstructures on a PET substrate, and the PMMA microstructures are generally prism-shaped, so that the brightness enhancement film is also commonly called as a prism sheet; the DBEF structure is formed by mutually attaching a plurality of layers of films capable of reflecting polarized light, can change the polarization direction of light, and is utilized after being reflected; BEF-RP is a combination of BEF and DBEF and functions as reflection utilization and light collection.

Preferably, a light shielding film 9 is further disposed on the front surface of the brightness enhancement film, in this embodiment, the light shielding film 9 is disposed on the front surface of the second brightness enhancement film 8, mainly plays a role of shielding light to form a viewing area and is adhered to a display screen, and a single-sided black mylar 10 is adhered to the front surface of the light shielding film 9.

Example 2

As shown in fig. 2, the wearable display screen provided by this embodiment includes the wearable display screen backlight structure of embodiment 1, and the FPC3 in the backlight structure is bent backward and adhered to the back plate 4, and then is adhered and fixed to the back plate 4. The front surface of the light shielding film 9 is adhered with a display screen 11, and the display screen 11 is connected with a display screen driving IC12 and a PFC (power factor correction) of the display screen, namely a second FPC13 in the figure. The FPC of the touch screen, i.e. the third FPC14 in the figure, is also included.

The back plate 4 comprises the black PET substrate layer 41 and the silver reflector 42, the FPC3, the second FPC13 and the third FPC14 are bent backwards and adhered to the back plate 4, poor display light spots can not occur, and the silver reflector 42 is used for obviously improving the reflection effect and the brightness of the back plate 4.

Claims

1. A wearable display screen backlight structure is characterized by comprising a back plate, a light guide plate, an LED light source and an FPC; the LED light source is positioned on the light incident side of the light guide plate and is electrically connected with the FPC; the back plate is arranged on one side of the non-light-emitting surface of the light guide plate; the back plate comprises a silver reflecting sheet and a black PET substrate layer, and the horizontal and longitudinal fracture elongation of the black PET substrate layer is 110-130%.

2. The wearable display screen backlight structure of claim 1, wherein the black PET substrate layer has a thickness of 0.1-0.15mm.

3. A wearable display screen backlight structure as claimed in claim 1, wherein the black PET substrate layer has a visible light transmittance of less than 1%.

4. The wearable display screen backlight structure of claim 1, wherein the dielectric loss factor of the black PET substrate layer is 0.2-0.3%.

5. A wearable display screen backlight structure as claimed in claim 1, wherein the silver reflector sheet is positioned between the light guide plate and the black PET substrate layer.

6. A wearable display screen backlight structure according to claim 1, further comprising a rubber frame, wherein the rubber frame is adhesively connected to the FPC and the black PET substrate layer.

7. A backlight structure for wearable display screen according to any of claims 1-6, wherein the front surface of the light guide plate is provided with a diffusion film, the diffusion film is provided with diffusion particles, and light emitted from the light guide plate can be diffused through the diffusion film.

8. The backlight structure of claim 7, wherein the front surface of the diffusion film is provided with 1 or 2 brightness enhancement films.

9. The backlight structure of claim 8, wherein a light shielding film is disposed on the front surface of the brightness enhancement film.

10. A wearable display screen, comprising the wearable display screen backlight structure of any one of claims 1-9.