CN113050323B - Backlight device and display device - Google Patents

Backlight device and display device Download PDF

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Publication number
CN113050323B
CN113050323B CN202110326424.7A CN202110326424A CN113050323B CN 113050323 B CN113050323 B CN 113050323B CN 202110326424 A CN202110326424 A CN 202110326424A CN 113050323 B CN113050323 B CN 113050323B
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shading
hole
light
side wall
layer
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CN202110326424.7A
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CN113050323A (en
Inventor
张鹏
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application discloses backlight device, display device. The backlight module comprises: the backlight module is provided with a through hole; and a shading component embedded into the through hole; wherein the shading assembly comprises: the outer side wall of the shading cylinder is tangent to the inner side wall of the through hole; and the outer side wall of the shading column is tangent to the inner side wall of the shading cylinder. According to the backlight module, the shading component is arranged in the through hole of the backlight module, so that the through hole has a good light leakage prevention effect, when the camera module is arranged opposite to the through hole, the shooting effect of the camera module is favorably improved, and the clearer shooting effect and the clearer picture display effect are realized.

Description

Backlight device and display device
Technical Field
The invention relates to the technical field of display, in particular to a backlight device and a display device.
Background
With the development of liquid crystal display technology, especially the development of full-screen technology, a backlight unit (BLU) of a display device is made into a structure of an in-plane hole, and mobile phone applications as a structure of a camera module placing area have been launched to the market.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a display device in the prior art. The display device 90 includes a backlight module 91 and a display panel 92 disposed above the backlight module 91.
The backlight module 91 includes an iron frame retaining wall 911, a reflective sheet 912, a light guide plate 913, an optical film assembly 914 and a square-shaped light-shielding adhesive 915, wherein the iron frame retaining wall 911 is bent to form a through hole 916, and is adhered to the side surfaces of the reflective sheet 912, the light guide plate 913 and the optical film assembly 914 through an adhesive frame retaining wall 917. The lower surface of the square-shaped light-shielding adhesive 915 is partially attached to the upper surface of the sidewall of the through hole 916, and the other part of the square-shaped light-shielding adhesive is attached to the upper surface of the optical film group 914 to shield light. The display panel 92 includes a lower polarizer 921, a backlight module 923, a color film substrate 924, and an upper polarizer 925. Specifically, the lower polarizer 922 is disposed on the backlight module 91; the backlight module 923 is arranged on the lower polarizer 922; the color film substrate 924 is arranged on the backlight module 923; the upper polarizer 925 is arranged on the color film substrate 924; the lower polarizer 922 and the upper polarizer 925 have a light hole or a transparent area at a position corresponding to the through hole 916.
However, no light source provides brightness inside the perforations 916 in fig. 1, and the perforations 916 only serve as a light-transmitting and receiving channel for the camera module ambient light disposed below the perforations 916. When the transceiving channel and the display area disposed opposite thereto have a display function, it is necessary to cancel the iron frame retaining wall 911 and the plastic frame retaining wall 917 around the through hole 916, and a light shielding column 900 is disposed in the through hole 916, as shown in fig. 2. Fig. 2 is a schematic structural diagram of a display device with a light-shielding column in the prior art.
The sidewalls of the light-shielding pillars 900 are only provided with a light-shielding layer, although the light-shielding pillars 900 can shield most of the light from entering the through holes 916, the light-shielding layer of the light-shielding pillars 900 cannot reflect light completely, and still light can enter the through holes 916 through the sidewalls of the light-shielding layer, or enter the through holes 916 from the tops of the light-shielding pillars 900, and the light can be refracted to the lower surface of the display panel 92. Because the film structure of the display panel 92 has the film pattern and the metal routing, the light can be reflected to the CCD lens of the camera module (not shown), which has a large influence on the shooting effect of the camera module, resulting in a white and blurred shot picture, and thus causing unsatisfactory shooting picture quality.
Disclosure of Invention
The present invention provides a backlight device and a display device, wherein a light-shielding component is disposed in a through hole of a backlight module to solve the technical problem that a picture taken by the backlight device is white and blurred.
In order to achieve the above object, the present invention provides a backlight device including: the backlight module is provided with a through hole; and a shading component embedded into the through hole; wherein the shading assembly comprises: the outer side wall of the shading cylinder is tangent to the inner side wall of the through hole; and the outer side wall of the shading column is tangent to the inner side wall of the shading cylinder.
Further, the light shielding tube includes: the first shading layer is tangent to the inner side wall of the through hole; and one surface of the euphotic layer is attached to the first shading layer, and the other surface of the euphotic layer is tangent to the outer side wall of the shading column.
Further, the light shielding tube includes: the first shading layer is tangent to the inner side wall of the through hole; a second shading layer, one surface of which is tangent to the outer side wall of the shading column; and a light-transmitting layer provided between the first light-shielding layer and the second light-shielding layer.
Further, the shading column includes: a light-transmitting body which is columnar; and the third shading layer covers the outer side wall of the light-transmitting body.
Furthermore, the thicknesses of the first shading layer, the second shading layer and the third shading layer are all less than or equal to 0.05 mm.
Further, the top surfaces and the bottom surfaces of the light-shielding cylinder and the light-shielding column are polished surfaces; the aperture of the through hole is greater than or equal to 6mm and less than or equal to 15 mm; and the clearance between the outer side wall of the shading cylinder and the outer side wall of the shading column is more than or equal to 0.03mm and less than or equal to 0.08 mm.
Further, the backlight device further comprises a camera module, the camera module is arranged opposite to the through hole, and the camera module is used for collecting images through the through hole.
Further, in the backlight device, the backlight module sequentially comprises a rubber frame, a reflecting film, a light guide plate, a diffusion film and a brightness enhancement film; the through-hole runs through in proper order the glued membrane frame the reflectance coating the light guide plate diffusion barrier, the membrane that adds lustre to.
In order to achieve the above object, the present invention further provides a display device, which includes the backlight device described above.
Further, the display device further comprises: the display panel is arranged on the backlight device; wherein the display panel includes: the first polaroid is arranged on the brightness enhancement film; the light shading glue is attached between the first polarizer and the brightness enhancement film and is close to the through hole; the array substrate is arranged on the first polarizer; the color film substrate is arranged on the array substrate; and the second polaroid is arranged on the color film substrate.
The backlight device and the display device have the advantages that the shading component is arranged in the through hole of the backlight module, so that the through hole has a good light leakage prevention effect, when the camera module is arranged opposite to the through hole, the shooting effect of the camera module is favorably improved, and the clearer shooting effect and the clearer picture display effect are realized.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a prior art display device;
FIG. 2 is a schematic diagram of a display device with a light-shielding column according to the prior art;
fig. 3 is a schematic structural diagram of a backlight device provided in embodiment 1 of the present application;
fig. 4 is a schematic structural diagram of a display device provided in embodiment 1 of the present application;
fig. 5 is a schematic structural diagram of a backlight device provided in embodiment 2 of the present application.
The components in the figure are identified as follows:
a display device 1000; backlight devices 100a, 100 b;
a display panel 200; a backlight module 10;
a shade assembly 20; a camera module 30;
a through-hole 110; a rubber frame 101;
a reflective film 102; a light guide plate 103;
a diffusion film 104; a brightness enhancement film 105;
a light shielding cylinder 201; a light-shielding column 202;
the first light-shielding layer 2011; a light transmitting layer 2012;
a light-transmitting body 2021; the third light-shielding layer 2022;
a first polarizing plate 21; a light-shielding adhesive 22;
an array substrate 23; a color film substrate 24;
and a second polarizer 25.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments.
Example 1
Fig. 3 is a schematic structural diagram of a backlight device according to an embodiment of the present application. Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application.
As shown in fig. 3 and 4, the present embodiment provides a display device 1000, which includes a backlight device 100a and a display panel 200.
The backlight device 100a includes a backlight module 10 and a light shielding assembly 20. Wherein, through set up in a through-hole 110 of backlight unit 10 shading component 20 makes through-hole 110 is inside to have good leak protection light effect, when camera module 30 with during the through-hole 110 sets up relatively, be favorable to promoting camera module 30's shooting effect to realize clearer shooting effect and picture display effect.
The backlight module 10 includes a frame 101, a reflective film 102, a light guide plate 103, a diffusion film 104, and a brightness enhancement film 105. The reflective film 102, the light guide plate 103, the diffusion film 104, and the brightness enhancement film 105 are sequentially disposed on the frame 101. In the backlight module 10, the films are fixed to each other by adhesion, so as to ensure good light conductivity of the light guide plate 103, reduce light loss, and stabilize and secure the structure of the light guide plate 103.
The backlight module 10 is provided with a through hole 110, the through hole 110 sequentially penetrates through the glue frame 101, the reflective film 102, the light guide plate 103, the diffusion film 104 and the brightness enhancement film 105, so that the glue frame 101 is provided with a glue frame hole, the reflective film 102 is provided with a reflective film hole, the light guide plate 103 is provided with a light guide plate hole, the diffusion film 104 is provided with a diffusion film hole, and the brightness enhancement film 105 is provided with a brightness enhancement film hole. The apertures of the glue frame hole, the reflective film hole, the light guide plate hole, and the diffusion film hole may be the same or different, and are not particularly limited herein. The through hole 110 may be annular, such as rectangular ring, circular ring, etc. in a top view.
The shade assembly 20 is inserted into the through hole 110. The shading assembly 20 comprises a shading cylinder 201 and a shading column 202, wherein the outer side wall of the shading cylinder 201 is tangent to the inner side wall of the through hole 110, and the outer side wall of the shading column 202 is tangent to the inner side wall of the shading cylinder 201.
Specifically, the light shielding cylinder 201 includes a first light shielding layer 2011 and a light transmitting layer 2012. The first light shielding layer 2011 is tangent to the inner side wall of the through hole 110, one surface of the light transmitting layer 2012 is attached to the first light shielding layer, and the other surface of the light transmitting layer 2012 is tangent to the outer side wall of the light shielding column 202.
The material that first light shield layer 2011 is used is silver, can adopt the coating by vaporization technology to be in the lateral wall coating film of shading post 202, wherein processes such as the relative spraying of coating by vaporization technology, coating by vaporization technology are favorable to promoting the validity of film formation, make the firm attached of first light shield layer 2011 is in the lateral wall of shading post 202, and be difficult for droing. In experiments, the applicant found that, although the multi-layer structure of silver-black-silver plated on the outer sidewall of the light-shielding column 202 has a better light-shielding effect than the single-layer structure of silver plated on the outer sidewall of the light-shielding column 202, however, the thickness of the light-shielding layer formed by the silver-black-silver multilayer structure is relatively thick, which easily affects the display screen, and the firmness of the silver-black-silver multi-layer structure is poorer than that of the silver single-layer structure, the silver layer on the surface of the silver-black-silver multi-layer structure is easy to fall off, therefore, in this embodiment, the first light-shielding layer 2011 is formed by a single silver layer, and has a film thickness of 0.05mm or less, preferably 0.02mm, 0.022mm, 0.025mm, or 0.03mm, the light shielding tube 201 has a good light shielding effect, and the stability and the falling prevention performance of the first light shielding layer 2011 can be provided.
The material of the transparent layer 2012 is polymethyl methacrylate (PMMA), but is not limited to other materials, as long as the material has good light transmittance.
The light-shielding column 202 includes a light-transmitting body 2021 and a third light-shielding layer 2022. The light-transmitting body 2021 is columnar, and the third light-shielding layer 2022 covers the outer side wall of the light-transmitting body 2021.
The material of the light-transmitting body 2021 is polymethyl methacrylate (PMMA), but is not limited to other materials, as long as the material has good light-transmitting property. In this embodiment, the light-transmitting layer 2012 and the light-transmitting body 2021 may be the same or different, and are not particularly limited herein.
The third light-shielding layer 2022 has the same structure, material, thickness, function, and the like as the first light-shielding layer 2011, which is not described herein in detail. The first light-shielding layer 2011 and the third light-shielding layer 2022 are made of materials having a function of blocking light.
The gap between the outer sidewall of the light-shielding cylinder 201 and the outer sidewall of the light-shielding column 202 is greater than or equal to 0.03mm and less than or equal to 0.08mm, that is, the thickness of the light-shielding cylinder 201 is greater than or equal to 0.03mm and less than or equal to 0.08 mm. The top and bottom surfaces of the light-shielding cylinder 201 and the light-shielding column 202 are polished surfaces, which have high light transmittance (generally, transmittance greater than or equal to 90%), and can ensure the definition of the image quality of the image pickup module 30 to the maximum.
The present embodiment provides a backlight device 100a, further comprising a camera module 30 disposed opposite to the through hole 110, wherein the camera module 30 performs image capture through the through hole 110.
It should be noted that, the larger the aperture of the through hole 110 is, the smaller the influence of the light leakage of the backlight module 10 on the CCD lens of the camera module 30 is, but in practical applications, the position of the through hole 110 is generally set at the edge of the display area, so as to limit the aperture of the through hole 110. Therefore, in the present embodiment, the aperture of the through hole 110 is greater than or equal to 6mm and less than or equal to 15mm, so that the influence of light leakage of the backlight module 10 on the image sensor CCD of the camera module 30 can be reduced.
Compared with a single light-shielding column in the prior art, the double-layer light-shielding layer of the light-shielding assembly 20 can effectively shield light from entering the through hole 110, wherein the shielded light is expected to be more than 95%. When a small amount of light enters the interior of the light shielding assembly 20 from the side wall thereof, the light shielding cylinder 201 shields the light for the first time, and the light shielding column 202 shields the light for the second time, so that the light cannot enter the interior of the light shielding column 202.
As shown in fig. 4, the display panel 200 is disposed on the backlight device 100 a. The display panel comprises a first polarizer 21, a light-shielding glue 22, an array substrate 23, a color film substrate 24 and a second polarizer 25.
The first polarizer 21, the light-shielding glue 22, the array substrate 23, the color film substrate 24, and the second polarizer 25 are sequentially disposed on the light-adding film 105, wherein the light-shielding glue 22 is attached between the first polarizer 21 and the light-adding film 105 and is close to the through hole 110. The light shielding glue 22 is used for further shielding light to prevent the light from entering the through hole 110 to affect the shooting effect, so that the shooting effect of the camera module 30 is improved, and the definition of the shooting image quality is improved.
In this embodiment, the display device 1000 may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
This embodiment provides a display device, works as the in-process that camera module 30 shot, there is not the ray in the entering through-hole 110 to promote camera module 30 shoots the effect, prevents to shoot the picture and whitens, fuzzy, improves and shoots the picture quality.
Example 2
The present embodiment provides a display device, including a backlight device, and embodiment 2 includes all technical solutions of embodiment 1, and the difference is that, in embodiment 2, the light shielding cylinder further includes a second light shielding layer.
As shown in fig. 5, fig. 5 is a schematic structural diagram of a backlight device according to an embodiment of the present application.
Specifically, the light shielding cylinder 201 includes a first light shielding layer 2011, a second light shielding layer 2013 and a light transmitting layer 2012.
The light-transmitting layer 2012 is disposed between the first light-shielding layer 2011 and the second light-shielding layer 2013, the first light-shielding layer 2011 is tangent to the inner sidewall of the through hole 101, and the second light-shielding layer 2013 is tangent to the outer sidewall of the light-shielding column 202.
Compared with the embodiment 1, the shading cylinder 201 of the embodiment adopts a double-layer shading layer, which is beneficial to further shading light rays from entering the through hole 110, so that the shooting effect of the camera module 30 is further improved by the through hole 110 without light rays entering the shooting process of the camera module 30, the shooting picture is prevented from being whitish and blurred, and the shooting picture quality is improved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The backlight device and the display device have the advantages that the light shading component is arranged in the through hole of the backlight module, so that the through hole has a good light leakage prevention effect, when the camera module is arranged opposite to the through hole, the shooting effect of the camera module is favorably improved, and the clearer shooting effect and the clearer picture display effect are realized.

Claims (9)

1. A backlight apparatus, comprising:
the backlight module is provided with a through hole; and
the shading component is embedded into the through hole;
wherein the shading assembly comprises:
the outer side wall of the shading cylinder is tangent to the inner side wall of the through hole; and
the outer side wall of the shading column is tangent to the inner side wall of the shading cylinder;
the light shielding tube includes:
the first shading layer is tangent to the inner side wall of the through hole; and
and one surface of the euphotic layer is attached to the first shading layer, and the other surface of the euphotic layer is tangent to the outer side wall of the shading column.
2. A backlight apparatus, comprising:
the backlight module is provided with a through hole; and
the shading component is embedded into the through hole;
wherein the shading assembly comprises:
the outer side wall of the shading cylinder is tangent to the inner side wall of the through hole; and
the outer side wall of the shading column is tangent to the inner side wall of the shading cylinder;
the light shielding tube includes:
the first shading layer is tangent to the inner side wall of the through hole;
a second shading layer, one surface of which is tangent to the outer side wall of the shading column; and
and a light-transmitting layer disposed between the first light-shielding layer and the second light-shielding layer.
3. A backlight apparatus, comprising:
the backlight module is provided with a through hole; and
the shading component is embedded into the through hole;
wherein the shading assembly comprises:
the outer side wall of the shading cylinder is tangent to the inner side wall of the through hole; and
the outer side wall of the shading column is tangent to the inner side wall of the shading cylinder;
the shading column comprises:
a light-transmitting body which is columnar; and
and the third shading layer covers the outer side wall of the light-transmitting body.
4. The backlight device according to any one of claims 1 to 3,
the thicknesses of the first shading layer, the second shading layer and the third shading layer are all less than or equal to 0.05 mm.
5. The backlight device according to any one of claims 1 to 3,
the top surfaces and the bottom surfaces of the shading cylinder and the shading column are polished surfaces;
the aperture of the through hole is greater than or equal to 6mm and less than or equal to 15 mm;
the clearance between the outer side wall of the shading cylinder and the outer side wall of the shading column is greater than or equal to 0.03mm and less than or equal to 0.08 mm.
6. The backlight device according to any one of claims 1 to 3, further comprising
And the camera module is arranged opposite to the through hole, and the camera module is used for acquiring images through the through hole.
7. The backlight device according to any one of claims 1 to 3, wherein the backlight module comprises an adhesive frame, a reflective film, a light guide plate, a diffusion film and a brightness enhancement film in sequence, and the through hole penetrates through the adhesive frame, the reflective film, the light guide plate, the diffusion film and the brightness enhancement film in sequence.
8. A display device comprising the backlight device according to any one of claims 1 to 7.
9. The display device according to claim 8, further comprising
The display panel is arranged on the backlight device;
wherein the display panel includes:
the first polaroid is arranged on the brightness enhancement film;
the light shading glue is attached between the first polarizer and the brightness enhancement film and is close to the through hole;
the array substrate is arranged on the first polarizer;
the color film substrate is arranged on the array substrate; and
and the second polaroid is arranged on the color film substrate.
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