CN115826294B - Backlight module, display module and display device - Google Patents
Backlight module, display module and display device Download PDFInfo
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- CN115826294B CN115826294B CN202211631645.6A CN202211631645A CN115826294B CN 115826294 B CN115826294 B CN 115826294B CN 202211631645 A CN202211631645 A CN 202211631645A CN 115826294 B CN115826294 B CN 115826294B
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- 238000005538 encapsulation Methods 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910021542 Vanadium(IV) oxide Inorganic materials 0.000 claims description 5
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 claims description 5
- 229940007424 antimony trisulfide Drugs 0.000 claims description 4
- NVWBARWTDVQPJD-UHFFFAOYSA-N antimony(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Sb+3].[Sb+3] NVWBARWTDVQPJD-UHFFFAOYSA-N 0.000 claims description 4
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 4
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Classifications
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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
-
- 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
- G02F1/1336—Illuminating devices
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application provides a backlight unit, display module assembly and display device, wherein backlight unit has light source region and dim light region, and backlight unit includes: a substrate; the light-emitting elements are arranged on one side of the substrate in an array manner, each light-emitting element is positioned in a light source area, adjacent light-emitting elements are arranged at intervals, and the brightness of the light source area is greater than that of the dark light area; the light-transmitting film layer is arranged on the light-emitting side of the light-emitting element and is positioned in the light source area and the dark light area; the light-sensitive material is at least positioned in the light source area of the light-transmitting film layer, and the refractive index of the light-sensitive material is increased along with the increase of the light intensity. The light-sensitive material is arranged at least at the position corresponding to the light source area in the light-transmitting film layer, wherein the refractive index of the light-sensitive material is increased along with the increase of the light intensity, so that the refractive index of light rays with larger brightness in the light source area can be increased by the light-sensitive material, and the light rays with larger brightness in the light source area are adjusted to the dim light area, so that the brightness intensity of the dim light area is improved.
Description
Technical Field
The application relates to the technical field of display devices, in particular to a backlight module, a display module and a display device.
Background
As liquid crystal displays are becoming more and more widely used in people's lives and works, large-sized liquid crystal displays are becoming more and more common. A sub-millimeter Light-Emitting Diode (Mini LED) backlight module has obvious advantages in terms of power consumption, HDR standard, brightness, product reliability, and the like, so in order to save power consumption, a large-sized liquid crystal display generally uses a sub-millimeter Light-Emitting Diode (Mini LED) backlight module as a backlight source.
The even distribution between the adjacent LED lamps on backlight unit's the lamp plate, but when the quantity of LED lamps is less, and the interval between the LED lamps is great, then cause the dark zone to appear between the adjacent LED lamps easily to lead to backlight unit and display panel's picture taste relatively poor, appear the uneven, bad taste such as shadow of picture display relatively easily.
Disclosure of Invention
The application provides a backlight module, a display module and a display device, which are used for solving the problem of uneven brightness of the backlight module.
In one aspect, the present application provides a backlight module, including light source region and darkness region, the backlight module includes:
a substrate;
the light-emitting elements are arranged on one side of the substrate in an array manner, each light-emitting element is positioned in the light source area, two adjacent light-emitting elements are arranged at intervals, and the brightness of the light source area is greater than that of the dark light area;
the light-transmitting film layer is arranged on the light-emitting side of the light-emitting element and covers the light source area and the dark light area;
the light-sensitive material is at least positioned in the light source area of the light-transmitting film layer, and the refractive index of the light-sensitive material is increased along with the increase of light intensity.
In one possible implementation manner of the present application, the light-sensitive material is distributed on the entire surface of the light-transmitting film layer, and the refractive index of the light-sensitive material in the light source area is greater than the refractive index of the light-sensitive material in the dark light area.
In one possible implementation manner of the present application, the dark light area includes at least a first dark area and a second dark area, the brightness of the first dark area is greater than the brightness of the second dark area, and the refractive index of the light sensing material in the first dark area is greater than the refractive index of the light sensing material in the second dark area.
In one possible implementation of the present application, the light-sensitive material includes at least one of vanadium dioxide, indium tin oxide, a Ge-Sb-Te based phase change material, or antimony trisulfide.
In one possible implementation of the present application, the refractive index of the light-sensitive material ranges from 1.5 to 1.8.
In one possible implementation manner of the present application, the light-transmitting film layer includes a packaging adhesive layer, the entire surface of the packaging adhesive layer is disposed on the light emitting side of the light emitting element, and the light sensing material is located inside the packaging adhesive layer.
In one possible implementation manner of the present application, the light-transmitting film layer is a multi-film layer structure, and the light-sensitive material is located in any one of the light-transmitting film layers;
the light-transmitting film layer includes at least two film layers of a light-splitting film, a diffusion film, a brightness enhancement film and a light conversion film which are laminated along the thickness direction of the substrate.
In one possible implementation of the present application, the light-transmitting film layer includes a diffusion plate, and the light-sensing material is coated on a surface of the diffusion plate facing the substrate, or the light-sensing material is coated on a surface of the diffusion plate facing away from the substrate.
On the other hand, the application also provides a display module, which comprises a backlight module and a display panel arranged on the backlight module, wherein the backlight module is the backlight module.
On the other hand, the application also provides a display device, which comprises the display module.
According to the backlight module, the display module and the display device, the plurality of light-emitting element arrays are arranged on one side of the substrate in the backlight module, each light-emitting element is located in the light source area and adjacent light-emitting elements are arranged at intervals, so that the brightness of the light source area is larger than that of the dark light area, the light-transmitting film layer is arranged on the light-emitting side of the light-emitting element and covers the light source area and the dark light area, the light-sensitive material is arranged in the light-transmitting film layer at least corresponding to the light source area, the refractive index of the light-sensitive material is increased along with the increase of the light intensity, namely the refractive index of the light-sensitive material can be automatically matched with the refractive index of the light intensity, the light-sensitive material can increase the refractive index of light with larger brightness in the light source area, the light with larger brightness in the light source area is adjusted to the dark light area, the brightness of the light source area is improved, the brightness of the light source area is uniform, the light intensity of the light source area and the light brightness of the dark light area in the backlight module is uniform, and the light-emitting brightness of the light source area is favorable for uniform light-emitting of the backlight module, and the display picture is further favorable to be improved.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic top view of a backlight module according to an embodiment of the disclosure.
Fig. 2 is a schematic cross-sectional structure of a backlight module according to an embodiment of the disclosure.
Fig. 3 is a schematic diagram showing a relationship between refractive index and light intensity of a photosensitive particle according to an embodiment of the present disclosure.
Fig. 4 is a schematic top view of a backlight module according to another embodiment of the disclosure.
Fig. 5 is a schematic cross-sectional structure of a backlight module according to another embodiment of the disclosure.
Fig. 6 is a schematic cross-sectional structure of a backlight module according to another embodiment of the disclosure.
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 will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" and "third" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. It should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, for example, as being directly connected, or indirectly connected through intermediaries, as being internal to two elements or as being in interaction with each other. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
The embodiment of the application provides a backlight module, a display module and a display device, which are respectively described in detail below.
Referring to fig. 1 to 6, the embodiment of the present application provides a backlight module having a light source region 101 and a dark light region 102, and the backlight module includes a substrate 10, a plurality of light emitting elements 20 and a transparent film layer 30.
As shown in fig. 2, the substrate 10 may include a back plate 11 of the backlight module and a driving circuit layer 12 disposed on the back plate 11, where the driving circuit layer 12 is used for driving the light emitting element 20 to emit light, and the back plate 11 may be a metal back plate 11, an aluminum-plastic back plate 11, or the like.
The plurality of light emitting elements 20 are arranged in an array on one side of the substrate 10. The light emitting element 20 may specifically be a light emitting diode (Light Emitting Diode, LED). Further, in the case of using an LED as the light emitting element 20, a miniaturized LED element such as a Mini LED or a Micro LED may be selected. Of course, the light emitting element 20 may be an LED of a normal size, or may be a light emitting element of another type than an LED.
As shown in fig. 1, each light emitting element 20 is located in a light source area 101, and two adjacent light emitting elements 20 are spaced apart, and the brightness of the light source area 101 is greater than the brightness of the dark light area 102. In the present embodiment, the light source region 101 is a region where the light emitting elements 20 are disposed, and the dark light region 102 is a void region between the light emitting elements 20, i.e., a non-light source region. Wherein the pitch of the adjacent two light emitting elements 20 may be 1-5mm, and illustratively, the pitch of the adjacent two light emitting elements 20 may be 3mm.
The light-transmitting film layer 30 is disposed on the light-emitting side of the light-emitting element 20, and the light-transmitting film layer 30 covers the light source region 101 and the dark region 102. The light-transmitting film layer 30 is used for light passing through the light-emitting element 20, and the light-transmitting film layer 30 is made of a light-transmitting material, which may specifically be a film substrate made of a transparent material such as polymethyl methacrylate (Polymethyl Methacrylate, PMMA), epoxy resin, or the like, or an optical film layer 33. The light-sensitive material 40 is located at least in the light source region 101 of the light-transmitting film layer 30, specifically, the light-sensitive material 40 may be located only in the light source region 101 of the light-transmitting film layer 30, or may be located partially in the light source region 101 and partially in the dark light region 102.
Wherein the refractive index of the light-sensitive material 40 becomes larger as the light intensity increases. Specifically, as shown in fig. 3, the refractive index and the light intensity of the light-sensitive material 40 in the embodiment of the present application may change linearly or may change non-linearly, which is not limited herein. According to the light source module, the light sensing material 40 can be used for automatically matching the characteristics of the self refractive indexes along with different light intensities, so that the refractive index of light rays with larger brightness in the light source area 101 can be increased by the light sensing material 40, the light rays with larger brightness in the light source area 101 are adjusted to the dim light area 102, the brightness value of the dim light area 102 can be improved, the brightness value of the light source area 101 is reduced, the brightness values between the dim light area 102 and the light source area 101 are balanced, and the uniformity of the brightness of the light rays in the backlight module is guaranteed.
According to the backlight module, the plurality of light emitting elements 20 are arranged on one side of the substrate 10 in an array manner, each light emitting element 20 is located in the light source area 101 and adjacent light emitting elements 20 are arranged at intervals, so that the brightness of the light source area 101 is larger than that of the dark light area 102, the light-transmitting film layer 30 is arranged on the light emitting side of the light emitting element 20 and covers the light source area 101 and the dark light area 102, and the light-sensitive material 40 is arranged in the light-transmitting film layer 30 at least corresponding to the light source area 101, wherein the refractive index of the light-sensitive material 40 is increased along with the increase of the light intensity, namely, the refractive index of the light-sensitive material 40 can be automatically matched with the refractive index of the light-sensitive material along with the difference of the light intensity, and the light-sensitive material 40 can increase the refractive index of light rays with larger brightness in the light source area 101, and accordingly the light rays with larger brightness in the light source area 101 are adjusted to the dark light area 102, so that the brightness intensity of the light source area 101 is increased, the light intensity of the light source area 101 and the light brightness of the dark light area 102 are even, the light intensity of the light source area 101 and the light intensity of the light source area 102 are evenly are improved, the light intensity of the light source is evenly is facilitated, and the light intensity of the backlight module is evenly is improved, and the light intensity is accordingly, the light intensity is better, and the light intensity of the brightness light intensity is better light area and the brightness light area is and the light area and light area.
In some embodiments, as shown in fig. 2, the light-sensitive material 40 is distributed over the entire surface of the light-transmitting film layer 30, and the refractive index of the light-sensitive material 40 in the light source region 101 is greater than the refractive index of the light-sensitive material 40 in the dark region 102. In the embodiment of the present application, the light-sensitive material 40 is formed on the light-transmitting film layer 30 in the light source region 101 and the dark light region 102 at the same time, so that the brightness of the light source region 101 and the dark light region 102 can be adjusted by the light-sensitive material 40 at the same time.
Specifically, since the light intensity of the dark light region 102 is weaker, the refractive index of the light-sensitive material 40 located in the dark light region 102 is also reduced, so that the refractive index of the light with smaller brightness in the dark light region 102 can be reduced by the light-sensitive material 40, the light with smaller brightness in the dark light region 102 is concentrated in the dark light region 102, the degree of diffusion of the light in the dark light region 102 to the light source region 101 is reduced, the brightness intensity of the dark light region 102 is improved, the brightness intensity of the light source region 101 in the backlight module is balanced with the brightness intensity of the light source region 102, and the brightness uniformity of the backlight module is improved.
In some embodiments, as shown in fig. 4, the dark light region 102 includes at least a first dark region 1021 and a second dark region 1022, wherein the brightness of the first dark region 1021 is greater than the brightness of the second dark region 1022, and the refractive index of the light sensing material 40 in the first dark region 1021 is greater than the refractive index of the light sensing material 40 in the second dark region 1022.
In this embodiment, the first dark region 1021 is between two adjacent light emitting elements 20, specifically, the first dark region 1021 may be a non-light source region between two light emitting elements 20 arranged at intervals along the length direction X of the substrate or the width direction Y of the substrate, and the second dark region 1022 may be a non-light source region between two light emitting elements 20 diagonally distributed, specifically, the second dark region 1022 is a non-light source region surrounded by four first dark regions 1021, that is, the distance between the first dark region 1021 and the light source region 101 is closer, and the distance between the second dark region 1022 and the light source region 101 is farther, so that the brightness of the first dark region 1021 is greater than that of the second dark region 1022.
Since the light intensity of the dark light region 102 is weaker, and the brightness of the first dark region 1021 is greater than the brightness of the second dark region 1022, the refractive index of the light sensing material 40 located in the first dark region 1021 is greater than the refractive index of the light sensing material 40 located in the second dark region 1022, so that the refractive index of the light with higher brightness in the second dark region 1022 can be increased through the light sensing material 40, and the refractive index of the light with lower brightness in the second dark region 1022 can be reduced, so that the light with lower brightness in the second dark region 1022 is concentrated in the second dark region 1022, and the light with higher brightness in the first dark region 1021 is diffused into the second dark region 1022, so that the brightness balance of the dark region 102 is improved, and the brightness intensity of the light source region 101 in the backlight module and the light brightness of the dark region 102 are further uniform, so that the light uniformity of the backlight module is further improved.
In some embodiments, the light-sensitive material 40 includes vanadium dioxide (VO), indium Tin Oxide (ITO), ge-Sb-Te (GTS) based phase change material, or antimony trisulfide (Sb 3 S 2 ) At least one of them.
Illustratively, the photosensitive material 40 may be vanadium dioxide, indium tin oxide, or antimony trisulfide. The light sensing material 40 may be formed inside the light transmitting film layer 30 by mixing doping, and the light sensing material 40 may be in the form of particles, for example, by mixing the light sensing material particles in the solute of the light transmitting film layer 30, so that the light sensing particles may be formed inside the light transmitting film layer 30. Of course, in other embodiments, the photosensitive material 40 may be printed on the surface of the light-transmitting film layer 30 by a coating process or a molding process. Specifically, when the optical material is formed on the surface of the light-transmitting film layer 30, the film layer formed of the optical material has a thickness of more than 0.1mm, so that the optical material can function as light refraction.
In some embodiments, the refractive index of the light-sensitive material 40 ranges from 1.5 to 1.8. The light-sensitive material 40 has different refractive indexes in different regions, and illustratively, the refractive index of the light-sensitive material 40 in the light source region 101 is 1.8, the refractive index of the light-sensitive material 40 in the dark light region 102 is 1.5, or the refractive index of the light-sensitive material 40 in the light source region 101 is 1.8, the refractive index of the light-sensitive material 40 in the first dark region 1021 is 1.6, and the refractive index of the light-sensitive material 40 in the second dark region 1022 is 1.5.
It can be understood that when the refractive index of the light-sensitive material 40 in the light source region 101 is too large, the strong light emitted from the light source region 101 may be totally reflected when passing through the light-sensitive material 40, so that the light source region 101 forms a dark shadow, while when the refractive index of the light-sensitive material 40 in the dark light region 102 is too small, the weak light emitted from the dark light region 102 may be too concentrated when passing through the light-sensitive material 40, so that the dark light region 102 forms a bright spot, which is unfavorable for the realization of uniform light emission of the backlight module.
According to the embodiment of the application, the refractive index of the light-sensitive material 40 is controlled within a certain range, so that uneven light-emitting brightness of the backlight module due to overlarge refractive index difference of different areas can be avoided.
In some embodiments, as shown in fig. 2, the light-transmitting film layer 30 includes an encapsulation adhesive layer 31, the entire surface of the encapsulation adhesive layer 31 is disposed on the light-emitting side of the light-emitting element 20, and the light-sensitive material 40 is located inside the encapsulation adhesive layer 31.
The encapsulation adhesive layer 31 may be made of glue materials such as epoxy resin or silica gel, and the encapsulation adhesive layer 31 is used for encapsulating the light-emitting element 20, so that the light-emitting element 20 can be sealed and protected, planarization of the light-emitting element 20 can be realized, and the light-emitting effect can be improved. The light-sensitive material 40 of the embodiment of the present application may be doped in the glue material, so that when the glue is coated on the whole surfaces of the light-emitting elements 20 to form the encapsulation glue layer 31, the light-sensitive material 40 may be formed inside the encapsulation glue layer 31, and further the brightness of the light source region 101 and the shadow region may be adjusted by the light-sensitive material 40 in the encapsulation glue layer 31, so that the encapsulation glue layer 31 plays the roles of protecting and flattening the light-emitting elements 20, and is beneficial to the uniform light-emitting effect of the backlight module. In addition, in the embodiment of the present application, the photosensitive material 40 is formed inside the encapsulation adhesive layer 31, so that no additional film layer is required to be added, and the thickness of the backlight module is not increased additionally.
In some embodiments, as shown in fig. 5, the light-transmitting film 30 includes a diffusion plate 32, and the light-sensitive material 40 is coated on a surface of the diffusion plate 32 facing the substrate 10, or the light-sensitive material 40 is coated on a surface of the diffusion plate 32 facing away from the substrate 10. Since the diffusion plate 32 is made of transparent material, the light sensing material 40 can be disposed on the surface of the diffusion plate 32 facing the substrate 10 or the surface facing away from the substrate 10. In the embodiment of the present application, a coating process, a molding process, or the like may be used to form the surface of the optical film layer 33, which is advantageous for simplifying the implementation process.
The light-sensitive material 40 may be distributed inside the diffusion plate 32, and is not particularly limited herein.
In some embodiments, as shown in fig. 6, the light-transmitting film 30 is a multi-film structure, and the light-sensitive material 40 is located in any one of the light-transmitting film 30. Specifically, the embodiment of the present application may be formed on the surface of the optical film layer 33 by a coating process or a molding process, which is advantageous for simplifying the implementation process.
The light-transmitting film layer 30 includes at least two film layers of a light-splitting film, a diffusion film, a brightness enhancement film, and a light conversion film, which are laminated along the thickness direction of the substrate 10. In the embodiment of the present application, the light-transmitting film layer 30 is an optical film layer 33, which is used for improving the light-emitting efficiency of the backlight module. Illustratively, the light-transmitting film layer 30 of the embodiment of the present application may include a diffusion film 331 and a brightness enhancing film 332 that are stacked along the thickness direction of the substrate 10. Among them, the diffusion film 331 may be used to enhance the light emission uniformity of the surface light source formed by the plurality of light emitting elements 20, and the brightness enhancement film 332 may be used to enhance the light emitting brightness of the light emitting elements 20. Correspondingly, the light-sensitive material 40 may be disposed on the diffusion film 331, or the light-sensitive material 40 may be disposed on the brightness enhancement film 332.
When the light emitting element 20 adopts a blue LED chip, the light transmitting film layer 30 may further include a light conversion film, and the light conversion film may be any one of a Quantum Dot (QD) film and a phosphor film, taking the light conversion film as an example, the blue light emitted from the blue LED chip emits red light and green light by exciting the red quantum dot and the green quantum dot, so that the red light, the green light and the blue light are mixed to generate white light, which is beneficial to realizing a wide color gamut of the backlight.
On the other hand, in order to better implement the backlight module of the present application, the embodiment of the present application further provides a display module, including the backlight module of any one of the embodiments and a display panel disposed on the backlight module. In this embodiment of the present application, the display panel may be a liquid crystal display panel, and the display panel is disposed on a light emitting side of the backlight module. The display module has the same beneficial effects as the display panel, and the embodiment is not repeated here.
On the other hand, in order to better implement the backlight module of the present application, the embodiment of the present application further provides a display device, including the display module of any one of the embodiments. Since the display device has the display panel, the display device has the same beneficial effects, and the embodiment is not repeated here.
The application of the display Device in this embodiment is not specifically limited, and may be a handheld Device (smart phone, tablet computer, etc.), a wearable Device (smart band, wireless earphone, smart watch, smart glasses, etc.), a vehicle-mounted Device (navigator, auxiliary reversing system, vehicle recorder, vehicle-mounted refrigerator, etc.), a virtual reality Device, an augmented reality Device, a Terminal Device (Terminal Device), etc., which are not limited herein.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.
The backlight module, the display module and the display device provided by the embodiments of the present application are described in detail, and specific examples are applied to explain the principles and implementation modes of the embodiments of the present application, and the description of the above embodiments is only used to help understand the technical solutions and core ideas of the embodiments of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The utility model provides a backlight unit, its characterized in that includes light source region and darkness region, backlight unit includes:
a substrate;
the light-emitting elements are arranged on one side of the substrate in an array manner, each light-emitting element is positioned in the light source area, two adjacent light-emitting elements are arranged at intervals, and the brightness of the light source area is greater than that of the dark light area;
the light-transmitting film layer is arranged on the light-emitting side of the light-emitting element and is positioned in the light source area and the dark light area;
the light-sensitive material is at least positioned in the light source area of the light-transmitting film layer, and the refractive index of the light-sensitive material automatically increases along with the increase of light intensity.
2. A backlight module according to claim 1, wherein the light-sensitive material is distributed over the entire surface of the light-transmissive film layer, and the refractive index of the light-sensitive material in the light source region is greater than the refractive index of the light-sensitive material in the dark light region.
3. The backlight module according to claim 2, wherein the dark light region comprises at least a first dark region and a second dark region, the brightness of the first dark region is greater than the brightness of the second dark region, and the refractive index of the light sensing material in the first dark region is greater than the refractive index of the light sensing material in the second dark region.
4. A backlight module according to claim 1, wherein the light-sensitive material comprises at least one of vanadium dioxide, indium tin oxide, ge-Sb-Te based phase change material or antimony trisulfide.
5. A backlight module according to claim 1, wherein the refractive index of the light-sensitive material is in the range of 1.5-1.8.
6. A backlight module according to any one of claims 1-5, wherein the light-transmitting film layer comprises an encapsulation glue layer, the entire encapsulation glue layer is disposed on the light-emitting side of the light-emitting element, and the light-sensitive material is disposed inside the encapsulation glue layer.
7. A backlight module according to any one of claims 1-5, wherein the light-transmissive film is of a multi-film structure, and the light-sensitive material is located in any one of the light-transmissive films;
the light-transmitting film layer includes at least two film layers of a light-splitting film, a diffusion film, a brightness enhancement film and a light conversion film which are laminated along the thickness direction of the substrate.
8. A backlight module according to any one of claims 1-5, wherein the light-transmitting film layer comprises a diffusion plate, and the light-sensitive material is coated on a surface of the diffusion plate facing the substrate, or on a surface of the diffusion plate facing away from the substrate.
9. A display module, comprising a backlight module and a display panel disposed on the backlight module, wherein the backlight module is the backlight module according to any one of claims 1-8.
10. A display device comprising the display module of claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211631645.6A CN115826294B (en) | 2022-12-19 | 2022-12-19 | Backlight module, display module and display device |
| PCT/CN2023/133034 WO2024131423A1 (en) | 2022-12-19 | 2023-11-21 | Backlight module, display module, and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211631645.6A CN115826294B (en) | 2022-12-19 | 2022-12-19 | Backlight module, display module and display device |
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| Publication Number | Publication Date |
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| CN115826294A CN115826294A (en) | 2023-03-21 |
| CN115826294B true CN115826294B (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211631645.6A Active CN115826294B (en) | 2022-12-19 | 2022-12-19 | Backlight module, display module and display device |
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| WO (1) | WO2024131423A1 (en) |
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| CN115826294B (en) * | 2022-12-19 | 2024-01-26 | 武汉华星光电技术有限公司 | Backlight module, display module and display device |
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| WO2016139954A1 (en) * | 2015-03-05 | 2016-09-09 | Nichia Corporation | Light emitting device |
| CN106405880B (en) * | 2016-11-21 | 2019-03-19 | 青岛海信电器股份有限公司 | Mangneto adjustable refractive index material, film, light guide plate, backlight module and display equipment |
| CN109407395B (en) * | 2018-10-23 | 2022-02-25 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN111240090A (en) * | 2020-01-15 | 2020-06-05 | 精电(河源)显示技术有限公司 | Optical film with uniform backlight, direct type backlight module and display device |
| CN115826294B (en) * | 2022-12-19 | 2024-01-26 | 武汉华星光电技术有限公司 | Backlight module, display module and display device |
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2022
- 2022-12-19 CN CN202211631645.6A patent/CN115826294B/en active Active
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- 2023-11-21 WO PCT/CN2023/133034 patent/WO2024131423A1/en unknown
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| US5451980A (en) * | 1993-10-19 | 1995-09-19 | The University Of Toledo | Liquid crystal flat panel color display with surface plasmon scattering |
| EP1731950A1 (en) * | 1998-10-08 | 2006-12-13 | NEC Corporation | Flat panel display |
| CN101620356A (en) * | 2008-06-30 | 2010-01-06 | 松下电器产业株式会社 | Optical apparatus, and wavelength conversion laser light source, image display apparatus, and laser light source device adopting such optical apparatus |
| CN211403045U (en) * | 2020-03-10 | 2020-09-01 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
| CN112130376A (en) * | 2020-09-24 | 2020-12-25 | 安徽晟华光学科技有限公司 | Reflection film for improving backlight brightness uniformity of display device |
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|---|---|
| WO2024131423A1 (en) | 2024-06-27 |
| CN115826294A (en) | 2023-03-21 |
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