CN117031826A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN117031826A CN117031826A CN202311109913.2A CN202311109913A CN117031826A CN 117031826 A CN117031826 A CN 117031826A CN 202311109913 A CN202311109913 A CN 202311109913A CN 117031826 A CN117031826 A CN 117031826A
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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
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
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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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Landscapes
- 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 belongs to the field of display, and particularly relates to a backlight module and a display device. The second light-emitting chip emits light to perform brightness compensation, so that the problem that the color gamut coverage and the brightness of a display picture cannot be considered is solved.
Description
Technical Field
The application belongs to the field of display, and particularly relates to a backlight module and a display device.
Background
The thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT LCD) has become the mainstream of the display field by virtue of its light weight, energy saving, high display quality, mature and stable manufacturing process, and the like. The liquid crystal display comprises a backlight module and a display panel, wherein the backlight module provides uniform white light, liquid crystal molecules in the display panel are oriented under the action of an electric field to change and control the permeation and blocking of backlight, and the backlight is filtered by a color film in the display panel to realize RGB display.
The backlight module may include a light emitting chip that emits blue light. In some technical schemes, the backlight module comprises yellow fluorescent powder, and blue light emitted by the light-emitting chip is converted into white light through the yellow fluorescent powder. In some embodiments, the backlight module includes a Quantum dot film (Quantum dot film), and blue light emitted from the light emitting chip is converted into white light by the Quantum dot film.
The backlight module using the yellow fluorescent powder for color conversion is used for a liquid crystal display, and the liquid crystal display has higher display screen brightness and narrower color gamut coverage. The backlight module using the quantum dot film for color conversion is used for a liquid crystal display, and the liquid crystal display has wide coverage of display picture color gamut, but lower picture brightness.
Disclosure of Invention
The application aims to provide a backlight module and a display device, which are used for solving the problem that the color gamut coverage and the brightness of a display picture cannot be simultaneously achieved.
In order to achieve the above object, the present application provides a backlight module, including a back plate and a first light guide plate, where the back plate includes a main body portion and a side plate portion, at least one of the side plate portions is disposed at an edge of the main body portion, and the first light guide plate is disposed at one side of the main body portion, and the backlight module further includes:
the second light guide plate is arranged on one side of the first light guide plate away from the main body part;
the quantum dot film is arranged between the first light guide plate and the second light guide plate;
the first lamp panel is arranged between the side plate part and the first light guide plate and comprises a first driving substrate and a first light emitting chip, the first light emitting chip is bound on the first driving substrate, and the light emitting surface of the first light emitting chip is opposite to the first light guide plate;
the second lamp panel is arranged between the side plate part and the second light guide plate and comprises a second driving substrate, a second light emitting chip and a color conversion layer, the second light emitting chip is bound on the second driving substrate, the light emitting surface of the second light emitting chip is opposite to the second light guide plate, and the color conversion layer is arranged on one side of the second light emitting chip away from the second driving substrate.
Optionally, the first light guide plate is close to one side of the main body portion and is provided with a light guide point, the second light guide plate is close to one side of the main body portion and is provided with a light guide point, and the light guide point of the second light guide plate comprises a non-printing lattice point.
Optionally, the backlight module further includes a first reflective film, and the first reflective film is disposed between the first light guide plate and the main body.
Optionally, the backlight module further includes a second reflective film, the back plate further includes an opposite portion, at least one of the side plate portions includes a first side plate portion, the opposite portion and the main body portion are respectively located at two ends of the first side plate portion, a height of the opposite portion relative to the first side plate portion is smaller than a height of the main body portion relative to the first side plate portion, the first light guide plate and the second light guide plate are located between the opposite portion and the main body portion, and the second reflective film is disposed on a side of the opposite portion close to the second light guide plate.
Optionally, the first light panel and the second light panel are located on the same side plate portion near one side of the first light guide plate.
Optionally, the first driving substrate and the second driving substrate are integrally connected, the first light emitting chip and the second light emitting chip are integrally packaged, the first light emitting chip and the second light emitting chip both comprise blue light emitting diodes, and the color conversion layer comprises yellow fluorescent powder.
Optionally, the quantum dot film includes an optical glue layer and quantum dots dispersed in the optical glue layer, and the first light guide plate and the second light guide plate are connected by bonding the quantum dot film.
Optionally, the backlight module further includes an optical adhesive layer, the first light guide plate and the quantum dot film are bonded and connected through one optical adhesive layer, and the second light guide plate and the quantum dot film are bonded and connected through another optical adhesive layer.
Optionally, the haze of the optical cement layer is 0.
The present application also provides a display device including:
the backlight module;
the display panel is arranged on the light emitting side of the backlight module.
The backlight module and the display device disclosed by the application have the following beneficial effects:
the backlight module comprises a back plate, a first light guide plate, a second light guide plate, a quantum dot film, a first lamp plate and a second lamp plate, wherein the back plate comprises a main body part and side plate parts, at least one side plate part is arranged at the edge of the main body part, the first light guide plate is arranged at one side of the main body part, the second light guide plate is arranged at one side of the first light guide plate far away from the main body part, the quantum dot film is arranged between the first light guide plate and the second light guide plate, the first lamp plate is arranged between one side plate part and the first light guide plate, the second lamp plate is arranged between one side plate part and the second light guide plate, the light emitting surfaces of light emitting chips of the first lamp plate and the second lamp plate are opposite to the corresponding light guide plates, the light of the first light emitting chips is converted into white light through the quantum dot film, and the light of the second light emitting chips is converted into white light through the color conversion layer. The first light-emitting chip emits light, the color gamut of the display screen of the display device is wider, and meanwhile, the second light-emitting chip emits light to perform brightness compensation, so that the brightness of the display screen of the display device can be obviously improved, and the problem that the color gamut coverage and the brightness of the display screen cannot be simultaneously achieved is solved.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the application.
Fig. 2 is a schematic diagram illustrating the operation of the backlight module in the highlighting mode according to an embodiment of the application.
Fig. 3 is a schematic diagram illustrating the operation of the backlight module in the medium-wide color gamut mode according to the embodiment of the application.
Fig. 4 is a schematic diagram illustrating the operation of the backlight module in the brightness enhancement mode according to the first embodiment of the application.
Fig. 5 is a view showing a contrast of the change of the angle in the first embodiment of the present application.
Fig. 6 is a schematic structural diagram of a lamp panel according to a second embodiment of the application.
Fig. 7 is a schematic diagram of a connection structure of two light guide plates in the third embodiment of the present application.
Fig. 8 is a schematic structural diagram of a display device according to a fourth embodiment of the present application.
Reference numerals illustrate:
100. a backlight module;
110. a back plate; 111. a main body portion; 112. a first side plate portion; 113. an opposing portion;
121. a first light guide plate; 122. a second light guide plate; 130. a quantum dot film;
140. a first lamp panel; 141. a first driving substrate; 142. a first light emitting chip;
150. a second lamp panel; 151. a second driving substrate; 152. a second light emitting chip; 153. a color conversion layer;
161. a first reflective film; 162. a second reflective film; 170. an optical adhesive layer;
200. a display panel; 300. an optical film.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.
The application will be described in further detail with reference to the drawings and the specific examples. It should be noted that the technical features of the embodiments of the present application described below may be combined with each other as long as they do not collide with each other. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
Example 1
Referring to fig. 1 to 4, the backlight module 100 in this embodiment includes a back plate 110, a first light guide plate 121, a second light guide plate 122, a quantum dot film 130, a first lamp plate 140 and a second lamp plate 150. The back plate 110 includes a main body portion 111 and side plate portions, at least one side plate portion is disposed at an edge of the main body portion 111, and at least one side plate portion includes a first side plate portion 112. When the back plate 110 includes a plurality of side plate portions, the plurality of side plate portions are disposed around the edge of the main body portion 111. The first light guide plate 121 is disposed on the side of the main body 111, and when the plurality of side plate portions are disposed around the edge of the main body 111, the first light guide plate 121 is located in an area surrounded by the plurality of side plate portions.
The second light guide plate 122 is disposed at a side of the first light guide plate 121 remote from the main body portion 111, and the quantum dot film 130 is disposed between the first light guide plate 121 and the second light guide plate 122. Both light guide plates can be made of glass, polycarbonate (PC), polymethyl methacrylate (PMMA) and other materials. The first lamp panel 140 is disposed between the side plate portion and the first light guide plate 121, and the second lamp panel 150 is disposed between the side plate portion and the second light guide plate 122. The first and second light panels 140 and 150 may be disposed at the same side or different sides of the two light guide plates.
The first lamp panel 140 includes a first driving substrate 141 and a first light emitting chip 142, the first light emitting chip 142 is bound on the first driving substrate 141, and a light emitting surface of the first light emitting chip 142 is opposite to the first light guide plate 121. The second light panel 150 includes a second driving substrate 151, a second light emitting chip 152, and a color conversion layer 153, where the second light emitting chip 152 is bound on the second driving substrate 151, the light emitting surface of the second light emitting chip 152 is opposite to the second light guide plate 122, and the color conversion layer 153 is disposed on a side of the second light emitting chip 152 away from the second driving substrate 151.
The first light emitting chip 142 and the second light emitting chip 152 each include light emitting diodes, and the light emitting diodes may emit red, green, blue, and the like. The first light emitting chip 142 and the second light emitting chip 152 may emit light in the same or different colors. The quantum dot film 130 may convert light of the first light emitting chip 142 into white light, and the color conversion layer 153 may convert light of the second light emitting chip 152 into white light.
The backlight module 100 is applied to a display device, and the display device may include a highlight mode, a wide color gamut mode, and a brightness enhancement mode.
Referring to fig. 2, in the highlighting mode, the second light emitting chip 152 emits light, and the light of the second light emitting chip 152 is converted into white light by the color conversion layer 153, then enters the second light guide plate 122, and is reflected by the light guide point of the second light guide plate 122 near the main body 111. The color conversion layer 153 converts the light of the second light emitting chip 152 into white light, and the display device displays a higher brightness.
Referring to fig. 3, in the wide color gamut mode, the first light emitting chip 142 emits light, and the light of the first light emitting chip 142 enters the first light guide plate 121, is reflected by the light guide point of the first light guide plate 121 near the main body 111, is converted into white light by the quantum dot film 130, and then passes through the second light guide plate 122 to emit light. The quantum dot film 130 is used to convert the light of the first light emitting chip 142 into white light, so that the display device displays a wider color gamut.
Referring to fig. 4, in the brightness enhancement mode, both the first light emitting chip 142 and the second light emitting chip 152 emit light. The first light emitting chip 142 emits light, the color gamut of the display device display screen is wider, and the brightness of the display device display screen can be improved by more than 130% by performing brightness compensation through the light emitted by the second light emitting chip 152.
The display device may include a highlight mode, a wide color gamut mode, and a brightness enhancement mode, and when higher brightness is required, the highlight mode may be employed to obtain relatively higher display screen brightness with relatively lower power consumption; when better color is needed, a wide color gamut mode can be used; the brightness enhancement mode may be used when both higher brightness and better color are desired, such as when used outdoors.
In the wide color gamut mode and the brightness enhancement mode, the light of the first light emitting chip 142 needs to pass through the two light guide plates sequentially. As shown in table 1, the first light emitting chip 142 has little change in color shift compared with the single-layer light guide plate and the double-layer light guide plate. Referring to fig. 5, the first light emitting chip 142 has little change in viewing angle compared with a single-layer light guide plate and a double-layer light guide plate.
TABLE 1 color shift change Table
| Color coordinates | Single-layer light guide plate | Double-layer light guide plate | Color cast |
| Wx | 0.311 | 0.313 | 0.002 |
| Wy | 0.325 | 0.328 | 0.003 |
The backlight module 100 using yellow phosphor for color conversion is used in a liquid crystal display, which has higher brightness but narrower color gamut coverage. The backlight module 100 using quantum dot film for color conversion is used in a liquid crystal display, which has a wide color gamut coverage but a low brightness.
In this embodiment, the backlight module 100 includes a back plate 110, a first light guide plate 121, a second light guide plate 122, a quantum dot film 130, a first light plate 140 and a second light plate 150, the back plate 110 includes a main body 111 and side plates, at least one side plate is disposed at the edge of the main body 111, the first light guide plate 121 is disposed at one side of the main body 111, the second light guide plate 122 is disposed at one side of the first light guide plate 121 far away from the main body 111, the quantum dot film 130 is disposed between the first light guide plate 121 and the second light guide plate 122, the first light plate 140 is disposed between one side plate and the first light guide plate 121, the second light plate 150 is disposed between one side plate and the second light guide plate 122, the light emitting surfaces of the light emitting chips of the first light plate 140 and the second light plate 150 are opposite to the corresponding light guide plates, the light of the first light emitting chips 142 is converted into white light by the quantum dot film 130, and the light of the second light emitting chips 152 is converted into white light by the color conversion layer 153. The first light emitting chip 142 emits light, the color gamut of the display screen of the display device is wider, and meanwhile, the brightness of the display screen of the display device can be obviously improved by performing brightness compensation through the light emission of the second light emitting chip 152, so that the problem that the color gamut coverage and the brightness of the display screen cannot be simultaneously achieved is solved.
Referring to fig. 1, a light guide point is disposed on a side of the first light guide plate 121 near the main body 111, a light guide point is disposed on a side of the second light guide plate 122 near the main body 111, the light guide point of the second light guide plate 122 includes non-printing dots, the non-printing dots are directly formed on a reflective surface of the light guide plate, and the forming method includes a chemical etching method, a precision mechanical engraving method, a photolithography method, an internal diffusion method, and the like. The light guide points of the first light guide plate 121 include non-printing dots or printing dots.
When the light guide points of the second light guide plate 122 are printing dots, the ink of the printing dots of the second light guide plate 122 may reflect or block the light emitted from the first light guide plate 121. The light guide points of the first light guide plate 121 and the second light guide plate 122 are non-printing dots, and the non-printing dots are directly formed on one side of the light guide plate, and have higher light transmittance than the printing dots. For example, the light guide plate made of polymethyl methacrylate can have a light transmittance of 92% or more.
Referring to fig. 1, the backlight module 100 further includes a first reflective film 161, the first reflective film 161 being disposed between the first light guide plate 121 and the main body portion 111.
The first reflective film 161 is disposed on the side of the first light guide plate 121 near the main body 111, and the first reflective film 161 can reflect the light passing through the first light guide plate 121, thereby improving the light utilization rate.
Referring to fig. 1, the back plate 110 further includes an opposite portion 113, at least one side plate portion includes a first side plate portion 112, the opposite portion 113 and the main body portion 111 are respectively located at two ends of the first side plate portion 112, and a height of the opposite portion 113 with respect to the first side plate portion 112 is smaller than a height of the main body portion 111 with respect to the first side plate portion 112. The first and second light guide plates 121 and 122 are located between the opposite portion 113 and the main body portion 111. The backlight module 100 further includes a second reflective film 162, where the second reflective film 162 is disposed on a side of the opposite portion 113 near the second light guide plate 122.
The second reflective film 162 is disposed on the opposite portion 113 near the second light guide plate 122, and the second reflective film 162 can reflect the light emitted from the second light guide plate 122 toward the opposite portion 113, thereby improving the light utilization rate.
Example two
The difference between the second embodiment and the first embodiment is that the structure and the position of the lamp panel are different.
In the first embodiment, the first and second light panels 140 and 150 may be disposed on the same or different sides of the two light guide plates. Referring to fig. 6, in the present embodiment, the first light panel 140 and the second light panel 150 are located on the same side plate portion near the first light guide plate 121. That is, the first lamp panel 140 may be disposed between the first side plate portion 112 and the first light guide plate 121, and the second lamp panel 150 may be disposed between the first side plate portion 112 and the second light guide plate 122. The first light panel 140 and the second light panel 150 may be adhesively connected to the first side panel portion 112.
The first light panel 140 and the second light panel 150 are disposed on the same side of the two light guide plates, and the backlight module 100 has a more compact lateral dimension, which is beneficial to narrow frame design of the display device.
Referring to fig. 6, when the first and second lamp panels 140 and 150 are disposed at the same side of the two light guide plates, the first and second driving substrates 141 and 151 may be integrally connected. The first and second light emitting chips 142 and 152 may be integrally packaged into a dual-crystal structure. For example, the first light emitting chip 142 and the second light emitting chip 152 each include a blue light emitting diode, and the color conversion layer 153 includes a yellow phosphor, which may be made of silicate. The package of the second light emitting chip 152 includes the color conversion layer 153, and the package of the first light emitting chip 142 does not include the color conversion layer 153.
The first driving substrate 141 and the second driving substrate 151 may be integrally connected, and the first light emitting chip 142 and the second light emitting chip 152 may be integrally packaged into a dual-crystal structure, so that the manufacturing and assembly of the lamp panel are simpler, and the manufacturing cost of the backlight module 100 may be reduced.
Example III
The third embodiment differs from the first embodiment in that the connection structure of the two light guide plates is different.
Referring to fig. 7, the backlight module 100 further includes an optical adhesive layer 170, the first light guide plate 121 and the quantum dot film 130 are adhesively connected by an optical adhesive layer 170, and the second light guide plate 122 and the quantum dot film 130 are adhesively connected by another optical adhesive layer 170.
The first light guide plate 121, the quantum dot film 130 and the second light guide plate 122 are adhered together through the optical adhesive layer 170, and the first light guide plate 121, the quantum dot film 130 and the second light guide plate 122 can be assembled integrally, so that the assembly difficulty of the backlight module 100 can be reduced, and the manufacturing cost of the backlight module 100 can be reduced.
In some embodiments, the quantum dot film 130 includes an optical glue layer 170 and quantum dots dispersed in the optical glue layer 170, and the first light guide plate 121 and the second light guide plate 122 are adhesively connected by the quantum dot film 130.
The quantum dot film 130 and the optical adhesive layer 170 are integrated, so that the assembly difficulty of the backlight module 100 and the thickness of the two light guide plates can be reduced, and the manufacturing cost of the backlight module 100 can be reduced.
When the backlight module 100 includes the optical cement layer 170, the optical cement layer 170 is formed by using an optical cement with a haze of 0 or close to 0.
The optical cement layer 170 is formed by adopting the optical cement with the haze of 0 or close to 0, so that the influence of the optical cement layer 170 on the light transmittance of the light guide plate can be reduced or eliminated, and the light utilization rate is improved.
Example IV
Referring to fig. 8, the display device in this embodiment includes a backlight module 100 and a display panel 200, the display panel 200 is disposed on a light emitting side of the backlight module 100, and the backlight module 100 includes the backlight modules 100 disclosed in the first to third embodiments. The display device may further include an optical film 300, and the optical film 300 is disposed between the backlight module 100 and the display panel 200. When the backlight module 100 includes the opposite portion 113, the opposite portion 113 and the optical film 300 are both positioned between the display panel 200 and the second light guide plate 122, and the optical film 300 is positioned at one side of the opposite portion 113.
The display device includes a backlight module 100, the backlight module 100 includes a back plate 110, a first light guide plate 121, a second light guide plate 122, a quantum dot film 130, a first light plate 140 and a second light plate 150, the back plate 110 includes a main body 111 and a side plate, at least one side plate is disposed at the edge of the main body 111, the first light guide plate 121 is disposed at one side of the main body 111, the second light guide plate 122 is disposed at one side of the first light guide plate 121 far from the main body 111, the quantum dot film 130 is disposed between the first light guide plate 121 and the second light guide plate 122, the first light plate 140 is disposed between one side plate and the first light guide plate 121, the second light plate 150 is disposed between one side plate and the second light guide plate 122, light emitting surfaces of light emitting chips of the first light plate 140 and the second light plate 150 are opposite to each other, light of the first light emitting chips 142 is converted into white light by the quantum dot film 130, and light of the second light emitting chips 152 is converted into white light by the color conversion layer 153. The first light emitting chip 142 emits light, the color gamut of the display screen of the display device is wider, and meanwhile, the brightness of the display screen of the display device can be obviously improved by performing brightness compensation through the light emission of the second light emitting chip 152, so that the problem that the color gamut coverage and the brightness of the display screen cannot be simultaneously achieved is solved.
The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present application have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the application, which is therefore intended to be covered by the appended claims and their equivalents.
Claims (10)
1. The utility model provides a backlight unit, includes backplate and first light guide plate, the backplate includes main part and curb plate portion, at least one curb plate portion sets up main part edge, first light guide plate sets up main part one side, its characterized in that, backlight unit still includes:
the second light guide plate is arranged on one side of the first light guide plate away from the main body part;
the quantum dot film is arranged between the first light guide plate and the second light guide plate;
the first lamp panel is arranged between the side plate part and the first light guide plate and comprises a first driving substrate and a first light emitting chip, the first light emitting chip is bound on the first driving substrate, and the light emitting surface of the first light emitting chip is opposite to the first light guide plate;
the second lamp panel is arranged between the side plate part and the second light guide plate and comprises a second driving substrate, a second light emitting chip and a color conversion layer, the second light emitting chip is bound on the second driving substrate, the light emitting surface of the second light emitting chip is opposite to the second light guide plate, and the color conversion layer is arranged on one side of the second light emitting chip away from the second driving substrate.
2. A backlight module according to claim 1, wherein the first light guide plate is provided with a light guide point on a side close to the main body, the second light guide plate is provided with a light guide point on a side close to the main body, and the light guide point of the second light guide plate comprises a non-printing dot.
3. A backlight module according to claim 2, further comprising a first reflective film disposed between the first light guide plate and the main body portion.
4. The backlight module according to claim 1, wherein the backlight module further comprises a second reflective film, the back plate further comprises an opposite portion, at least one of the side plate portions comprises a first side plate portion, the opposite portion and the main body portion are located at two ends of the first side plate portion, respectively, the opposite portion has a smaller height relative to the first side plate portion than the main body portion, the first light guide plate and the second light guide plate are located between the opposite portion and the main body portion, and the second reflective film is disposed on a side of the opposite portion close to the second light guide plate.
5. The backlight module according to claim 1, wherein the first lamp panel and the second lamp panel are located on a side of the same side plate portion, which is close to the first light guide plate.
6. A backlight module according to claim 5, wherein the first driving substrate and the second driving substrate are integrally connected, the first light emitting chip and the second light emitting chip are integrally packaged, the first light emitting chip and the second light emitting chip each comprise a blue light emitting diode, and the color conversion layer comprises yellow fluorescent powder.
7. The backlight module according to claim 1, wherein the quantum dot film comprises an optical adhesive layer and quantum dots dispersed in the optical adhesive layer, and the first light guide plate and the second light guide plate are adhesively connected through the quantum dot film.
8. The backlight module according to claim 1, further comprising an optical adhesive layer, wherein the first light guide plate and the quantum dot film are adhesively connected by one optical adhesive layer, and the second light guide plate and the quantum dot film are adhesively connected by another optical adhesive layer.
9. A backlight module according to claim 7 or 8, wherein the haze of the optical adhesive layer is 0.
10. A display device, comprising:
a backlight module according to any one of claims 1 to 9;
the display panel is arranged on the light emitting side of the backlight module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311109913.2A CN117031826A (en) | 2023-08-30 | 2023-08-30 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311109913.2A CN117031826A (en) | 2023-08-30 | 2023-08-30 | Backlight module and display device |
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| CN117031826A true CN117031826A (en) | 2023-11-10 |
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