CN112631023B - Quantum dot display panel and quantum dot display device - Google Patents
Quantum dot display panel and quantum dot display device Download PDFInfo
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- CN112631023B CN112631023B CN202011566739.0A CN202011566739A CN112631023B CN 112631023 B CN112631023 B CN 112631023B CN 202011566739 A CN202011566739 A CN 202011566739A CN 112631023 B CN112631023 B CN 112631023B
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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
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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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
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Abstract
The embodiment of the invention provides a quantum dot display panel and a quantum dot display device, wherein the quantum dot display panel comprises: the backlight module consists of an ultraviolet light backlight module and a white light backlight module; the quantum dot color film structure is positioned on the light-emitting side of the backlight module and covers the ultraviolet backlight module, and the white light transparent area covers the white light backlight module; the vertical projections of the plurality of red light quantum dot substructures of the red light quantum dot color film structure, the plurality of green light quantum dot substructures of the green light quantum dot color film structure, the plurality of blue light quantum dot substructures of the blue light quantum dot color film structure and the plurality of white light transmitting sub-regions of the white light transmitting region on the plane where the backlight module is located are not overlapped. According to the technical scheme provided by the embodiment of the invention, a color filter is not used, and the luminous efficiency is improved; the performance of the quantum dots is optimized, and the reliability of a color film structure is ensured; the display brightness can be enhanced directly through the white light transparent area, and the maximum utilization of the backlight source energy is realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of quantum dot display, in particular to a quantum dot display panel and a quantum dot display device.
Background
The particle size of Quantum Dot (QD) materials is generally between 1-10nm, and since electrons and holes are Quantum confined, the continuous energy band structure is changed into a discrete energy level structure, so that the emission spectrum is very narrow (20-30nm), the chromaticity is high, the display color gamut is wide, and the color gamut can greatly exceed the color gamut range (> 100%) of National Television Standards Committee (NTSC). Due to its special characteristics, quantum dots are emerging as a new generation of luminescent materials in LED display applications.
The quantum dot color film is a key component of a display device for realizing ultrahigh color gamut full-color display, and in the prior art, red and green quantum dots are mixed together to form a quantum dot color conversion film, and then the quantum dot color conversion film is matched with a liquid crystal display module and a blue light LED light source to realize high color gamut display. However, this solution has the following problems: 1) the red, green and blue lights after color conversion need to be filtered by a color filter, and the luminous efficiency is extremely low; 2) the red quantum dots and the green quantum dots are directly mixed, and the two quantum dots can mutually influence in the preparation and use processes of the diaphragm, so that the performance is deteriorated, and the reliability of the diaphragm is poor.
Disclosure of Invention
In view of this, embodiments of the present invention provide a quantum dot display panel and a quantum dot display device, which avoid using a color filter, and improve the light emitting efficiency; the performance of the quantum dots is optimized, and the reliability of a color film structure is ensured; the display brightness is enhanced directly through the white light transparent area, and further the maximum utilization of the backlight source energy is realized.
In a first aspect, an embodiment of the present invention provides a quantum dot display panel, including:
the backlight module comprises an ultraviolet light backlight module and a white light backlight module;
the quantum dot color film structure and the white light transmission area are positioned on the light emitting side of the backlight module, the quantum dot color film structure covers the ultraviolet backlight module, and the white light transmission area covers the white light backlight module; the quantum dot color film structure comprises a red light quantum dot color film structure, a green light quantum dot color film structure and a blue light quantum dot color film structure; the red light quantum dot color film structure comprises a plurality of red light quantum dot substructures, the green light quantum dot color film structure comprises a plurality of green light quantum dot substructures, the blue light quantum dot color film structure comprises a plurality of blue light quantum dot substructures, the white light transmission region comprises a plurality of white light transmission sub-regions, and the vertical projections of the red light quantum dot substructures, the green light quantum dot substructures, the blue light quantum dot substructures and the white light transmission sub-regions on the plane of the backlight module are not overlapped.
Optionally, the red light quantum dot color film structure is located on the light emitting side of the ultraviolet light backlight module;
the green light quantum dot color film structure is positioned on one side of the red light quantum dot color film structure, which is far away from the ultraviolet light backlight module;
the blue light quantum dot color film structure is positioned on one side of the green light quantum dot color film structure, which is far away from the ultraviolet light backlight module.
Optionally, the red light quantum dot color film structure, the green light quantum dot color film structure and the blue light quantum dot color film structure are arranged in the same layer.
Optionally, the red light quantum dot sub-structure forms a red light sub-pixel; the green light quantum dot sub-structure forms a green light sub-pixel; the blue light quantum dot sub-structure forms a blue light sub-pixel, and the white light transmitting sub-area forms a white light sub-pixel;
each adjacent red photon pixel, green light sub-pixel, blue light sub-pixel and white photon pixel form a pixel unit; and a shading retaining wall is arranged between the adjacent pixel units.
Optionally, the light-shielding retaining wall comprises an organic material and a light-tight material dispersedly disposed in the organic material;
the opaque material includes at least one of an inorganic non-metallic material, a black metal oxide material, or an organic black pigment.
Optionally, the ultraviolet backlight module comprises a plurality of ultraviolet OLED light emitting elements or ultraviolet micro-LEDs arranged in an array;
the white light backlight module comprises a plurality of white light OLED light emitting elements or white light micro-LEDs which are arranged in an array.
Optionally, the wavelength range of the emergent light peak of the ultraviolet light backlight module is 230-390 nm;
the peak wavelength range of the emergent light of the white light backlight module is 312-660 nm.
Optionally, the peak wavelength range of the emergent light of the red light quantum dot substructure is 600-660nm, and the half-wave width of the emergent light is less than 35 nm;
the peak wavelength range of emergent light of the green light quantum dot substructure is 520-560nm, and the half-wave width of the emergent light is less than 35 nm;
the peak wavelength range of the emergent light of the blue light quantum dot substructure is 420-480nm, and the half-wave width of the emergent light is less than 20 nm.
Optionally, the quantum dot display panel further includes a water-oxygen barrier layer;
the water oxygen barrier layer is including being located the various membrane structure of quantum dot is close to the first water oxygen barrier layer of backlight unit one side, and/or, is located the various membrane structure of quantum dot is kept away from the second water oxygen barrier layer of backlight unit one side.
In a second aspect, an embodiment of the present invention further provides a quantum dot display device, including any one of the quantum dot display panels.
The invention provides a quantum dot display panel, comprising: the backlight module comprises an ultraviolet light backlight module and a white light backlight module, wherein the quantum dot color film structure and the white light transmission area are positioned on the light emitting side of the white light backlight module; the quantum dot color film structure comprises a red light quantum dot color film structure, a green light quantum dot color film structure and a blue light quantum dot color film structure, the red light quantum dot color film structure comprises a plurality of red light quantum dot substructures, the green light quantum dot color film structure comprises a plurality of green light quantum dot substructures, the blue light quantum dot color film structure comprises a plurality of blue light quantum dot substructures, and the white light transmission region comprises a plurality of white light transmission sub-regions; the vertical projections of the red light quantum dot substructure, the green light quantum dot substructure, the blue light quantum dot substructure and the white light transmitting sub-region on the plane of the backlight module are not overlapped. According to the technical scheme provided by the invention, the red light quantum dot color film structure, the green light quantum dot color film structure and the blue light quantum dot color film structure are separately and independently arranged, and the red light quantum dot color film structure, the green light quantum dot color film structure and the blue light quantum dot color film structure are excited by ultraviolet light to respectively emit red light, green light and blue light, so that full-color display is realized, the red light, the green light and the blue light after color conversion can be prevented from being filtered by using a color filter, and the luminous efficiency is improved; the quantum dot material of different light can be prevented from being directly mixed, the quantum dots of different light are prevented from influencing and interfering with each other, the performance of the quantum dots can be optimized, the reliability of the quantum dot color film structure is ensured, in addition, the display brightness can be directly enhanced through the white light transmission area, and the maximum utilization of the backlight source energy is further realized.
Drawings
Fig. 1 is a schematic structural diagram of a quantum dot display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another quantum dot display panel according to an embodiment of the present invention;
fig. 3 is a top view of a quantum dot color film structure of a quantum dot display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a quantum dot display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a quantum dot display panel according to an embodiment of the present invention, and as shown in fig. 1, the quantum dot display panel includes: a backlight module 100, which includes an ultraviolet backlight module 110 and a white light backlight module 120; the quantum dot color film structure 200 and the white light transparent area 400 are positioned on the light-emitting side of the backlight module 100, the quantum dot color film structure 200 covers the ultraviolet backlight module 110, and the white light transparent area 400 covers the white light backlight module 120; the quantum dot color film structure 200 comprises a red quantum dot color film structure 210, a green quantum dot color film structure 220 and a blue quantum dot color film structure 230; the red light quantum dot color film structure 210 includes a plurality of red light quantum dot substructures 211, the green light quantum dot color film structure 220 includes a plurality of green light quantum dot substructures 221, the blue light quantum dot color film structure 230 includes a plurality of blue light quantum dot substructures 231, the white light transmission region 400 includes a plurality of white light transmission sub-regions 411, the red light quantum dot substructures 211, the green light quantum dot substructures 221, the blue light quantum dot substructures 231 and the white light transmission sub-regions 411 are not overlapped in the vertical projection of the backlight module 100 on the plane.
Illustratively, the quantum dot display panel includes: the backlight module 100 comprises a quantum dot color film structure 200 and a white light transparent area 400, the quantum dot color film structure 200 is located on the light emitting side of the backlight module 100, the backlight module 100 comprises an ultraviolet light backlight module 110 and a white light backlight module 120, and the quantum dot color film structure 200 comprises a red light quantum dot color film structure 210, a green light quantum dot color film structure 220, a blue light quantum dot color film structure 230 and a quantum dot color film deposition substrate 202, and is fixed through packaging glue 240. The red light quantum dot color film structure 210 comprises a plurality of red light quantum dot substructures 211, the green light quantum dot color film structure 220 comprises a plurality of green light quantum dot substructures 221, the blue light quantum dot color film structure 230 comprises a plurality of blue light quantum dot substructures 231, the white light transmission area 400 comprises a plurality of white light transmission sub-areas 411, the quantum dot color film structure 200 covers the ultraviolet light backlight module 110, the white light transmission area 400 covers the white light backlight module 120, and the vertical projections of the red light quantum dot substructures 211, the green light quantum dot substructures 221, the blue light quantum dot substructures 231 and the white light transmission sub-areas 411 on the plane where the backlight module 100 is located are not overlapped. In the embodiment of the invention, firstly, the ultraviolet light emitted by the ultraviolet light backlight module 110 excites the red light quantum dot color film structure 210, the green light quantum dot color film structure 220 and the blue light quantum dot color film structure 230 to respectively emit red light, green light and blue light, so as to ensure the realization of full-color display; meanwhile, the red light quantum dot color film structure 210, the green light quantum dot color film structure 220 and the blue light quantum dot color film structure 230 are independently arranged, and the vertical projections of the red light quantum dot substructure 211, the green light quantum dot substructure 221 and the blue light quantum dot substructure 231 on the plane of the backlight module 100 are not overlapped, so that red light, green light and blue light after color conversion can be prevented from being filtered by using a color filter, the luminous efficiency is improved, quantum dot materials of different lights can be prevented from being directly mixed, the quantum dots of different lights can be prevented from influencing and interfering with each other, the performance of the quantum dots can be optimized, and the reliability of the quantum dot color film structure can be ensured.
In the embodiment of the invention, the backlight module 100 is formed by selecting the ultraviolet backlight module 110 and the white light backlight module 120, and the white light transparent area 400 is arranged, so that three quantum dot materials of red, green and blue can be excited by ultraviolet light; the vertical projection of the white light transmitting sub-region 411 on the plane of the backlight module 100 is not overlapped with the vertical projection of the red light quantum dot substructure 211, the green light quantum dot substructure 221 and the blue light quantum dot substructure 231 on the plane of the backlight module 100, so that not only can the three primary colors of red, green and blue be selected to realize color display when a color picture needs to be displayed, but also the white light backlight module 120 can be directly selected to enhance the display brightness through the white light transmitting region 400, and further the maximum utilization of the backlight source energy is realized.
For example, in the existing quantum dot display scheme for mass production, a red-green mixed quantum dot color conversion film is used (red-green powder is directly mixed together), and a color filter is used for filtering red light and green light after color conversion, so that the light conversion efficiency is about 30%, while a quantum dot color film arranged by red and green sub-pixel points distributed in a pixel level is used in the scheme, so that the color filter is not needed, and the light conversion efficiency can reach more than 80%.
Optionally, with continued reference to fig. 1, the red light quantum dot color film structure 210, the green light quantum dot color film structure 220, and the blue light quantum dot color film structure 230 are disposed in the same layer. The red light quantum dot color film structure 210, the green light quantum dot color film structure 220 and the blue light quantum dot color film structure 230 are arranged on the same layer, so that the structure of the quantum dot color film structure 200 is simple, and the light and thin design of the quantum dot color film structure 200 is facilitated.
Optionally, as shown in fig. 1, the ultraviolet backlight module 110 may include a plurality of ultraviolet OLED light emitting elements or ultraviolet micro-LEDs arranged in an array; the white backlight module 120 may include a plurality of white OLED light emitting elements or white micro-LEDs arranged in an array. Specifically, the backlight module 100 may include an ultraviolet backlight module 110 composed of a plurality of ultraviolet OLED light emitting elements or ultraviolet micro-LEDs arranged in an array, a white light backlight module 120 composed of a plurality of white OLED light emitting elements or white micro-LEDs arranged in an array, and a backlight substrate 130, so as to implement pixel-level backlight. The quantum dot display panel provided by the embodiment of the invention can be matched with active light-emitting Micro-LED and OLED display devices for use, has wider application field, and can realize higher color gamut display by arranging the ultraviolet light backlight module 110 and the white light backlight module 120 in combination with the quantum dot color film structure 200.
Optionally, the wavelength range of the emergent light peak of the ultraviolet backlight module 110 is 230-390 nm; the peak wavelength range of the emergent light of the white backlight module 120 may be 312-660 nm. The ultraviolet backlight module 110 can emit ultraviolet light with a wavelength range of 230-390nm, and is used for exciting the red light quantum dot color film structure 210, the green light quantum dot color film structure 220 and the blue light quantum dot color film structure 230 which are correspondingly arranged on the quantum dot color film structure 200, so as to realize full-color display; the white light backlight module 120 can emit white light with a wavelength range of 312-660nm, and is used for directly transmitting the white light transmission region 400 to enhance the display brightness, so as to realize the maximum utilization of the backlight source energy.
Optionally, with continued reference to fig. 1, the quantum dot display panel may further include a water oxygen barrier layer 300; the water-oxygen barrier layer 300 includes a first water-oxygen barrier layer 310 located on a side of the quantum dot color film structure 200 close to the backlight module 100, and/or a second water-oxygen barrier layer 320 located on a side of the quantum dot color film structure 200 away from the backlight module 100. Specifically, the water-oxygen barrier layer 300 is a layer of a dense metal oxide, such as Al, formed by vacuum evaporation or magnetron sputtering2O3、ZrO2、TiO2、Fe2O3、ZnO2The thickness of the metal oxide layer of one or more compounds in the above formula is 3-50nm, and the metal oxide layer can be attached to the lower surface of the quantum dot color film structure 200 to form a first water and oxygen barrier layer 310, or attached to the upper surface of the quantum dot color film structure 200 to form a second water and oxygen barrier layer 320, or attached to the upper and lower surfaces of the quantum dot color film structure 200 to form a second water and oxygen barrier layer 300, so that the quantum dot color film structure 200 can be prevented from being corroded by external water and oxygen.
On the basis of the above embodiments, the embodiment of the invention also provides another quantum dot display panel. Fig. 2 is a schematic structural diagram of another quantum dot display panel according to an embodiment of the present invention, as shown in fig. 2, optionally, the red light quantum dot color film structure 210 may be located on a light exit side of the ultraviolet light backlight module 110; the green light quantum dot color film structure 220 may be located on a side of the red light quantum dot color film structure 210 away from the ultraviolet light backlight module 110; the blue light quantum dot color film structure 230 may be located on a side of the green light quantum dot color film structure 220 away from the ultraviolet backlight module 110.
Specifically, in the quantum dot color film structure in the prior art, red light quantum dots, green light quantum dots and blue light quantum dots are directly mixed, so that the red light quantum dots can absorb green light emitted by the green light quantum dots and blue light emitted by the blue light quantum dots again, and the overall luminous efficiency is reduced. In the embodiment of the invention, the red light quantum dot color film structure 210 is arranged on the light-emitting side closest to the ultraviolet light backlight module 110, the green light quantum dot color film structure 220 is arranged on the side of the red light quantum dot color film structure 210 away from the ultraviolet light backlight module 110, the blue light quantum dot color film structure 230 is arranged on the side of the green light quantum dot color film structure 220 away from the ultraviolet light backlight module 110, and the red light quantum dot substructure 211, the green light quantum dot substructure 221, the blue light quantum dot substructure 231 and the white light transmitting subregion 411 are arranged at the same time so that the vertical projections on the plane of the backlight module 100 are not overlapped, so that the red light quantum dot substructure 211, the green light quantum dot substructure 221 and the blue light quantum dot substructure 231 can be prevented from being directly mixed by overlapping the multi-layer patterned quantum dot color films, and the problems of performance deterioration and poor reliability of the films caused by mutual contact and interference among the quantum dot substructures can be avoided, and the reabsorption of the long-wave quantum dot material to the emitted light of the short-wave quantum dot material can be reduced, so that the overall luminous efficiency of the display device is improved.
Optionally, the peak wavelength range of the emergent light of the red light quantum dot substructure 211 can be 600-660nm, and the half-wave width of the emergent light is less than 35 nm; the peak wavelength range of the emergent light of the green light quantum dot substructure 221 can be 520-560nm, and the half-wave width of the emergent light is less than 35 nm; the peak wavelength range of the emergent light of the blue light quantum dot substructure 231 can be 420-480nm, and the half-wave width of the emergent light is less than 20 nm.
Specifically, the red light quantum dot substructure 211 can be composed of a red light quantum dot material 2111 and a red light quantum dot deposition substrate 2112, the red light quantum dot material 2111 can emit red light with a wavelength range of 600-660nm under the excitation of ultraviolet light, purple light, blue light or green light, and the half-wave width of the emergent light can be less than 35nm, so that the emission of the red light quantum dots is realized; the green light quantum dot substructure 221 can be composed of a green light quantum dot material 2211 and a green light quantum dot deposition substrate 2212, the green light quantum dot material 2211 can emit green light with a wavelength range of 520 and 560nm under the excitation of ultraviolet light, purple light or blue light, and the half-wave width of emergent light can be less than 35nm, so that the emission of the green light quantum dots is realized; the blue light quantum dot substructure 231 may be composed of a blue light quantum dot material 2311 and a blue light quantum dot deposition substrate 2312, the blue light quantum dot material 2311 may emit blue light with a wavelength range of 420-480nm under the excitation of ultraviolet light or violet light, and the half-wave width of the emergent light may be less than 20nm, so as to realize the emission of the blue light quantum dot.
Fig. 3 is a top view of a quantum dot color film structure of a quantum dot display panel according to an embodiment of the present invention, and as shown in fig. 3, optionally, a red light quantum dot sub-structure 211 forms a red light sub-pixel; the green quantum dot sub-structure 221 forms a green sub-pixel; the blue light quantum dot sub-structure 231 forms a blue light sub-pixel, and the white light transmitting sub-region 411 forms a white light sub-pixel; each adjacent red sub-pixel, green sub-pixel, blue sub-pixel and white sub-pixel form a pixel unit 500; the light blocking walls 600 may be disposed between the adjacent pixel units 500.
Specifically, ruddiness quantum dot substructure 211 forms ruddiness subpixel, greenish glow quantum dot substructure 221 forms the green glow subpixel, blue light quantum dot substructure 231 forms the blue light subpixel, white light printing opacity subregion 411 forms the white light subpixel, so realize ruddiness quantum dot, the green glow quantum dot, the pixel level setting of blue light quantum dot and white light quantum dot, guarantee can promote the display contrast between the different pixels, promote display panel's display effect, and can be provided with shading barricade 600 between adjacent pixel unit 500, separate each pixel unit 500, avoid appearing the optical crosstalk phenomenon, further improve display resolution.
Alternatively, the light blocking wall 500 mayTo include organic material and opaque material dispersed in the organic material; the opaque material includes at least one of an inorganic non-metallic material, a black metal oxide material, or an organic black pigment. Specifically, the light-shielding wall 500 may be made of an inorganic non-metallic material (e.g., carbon powder) having a particle size of 5 to 100nm or a black metal oxide material (e.g., Fe)3O4) Or an organic black pigment, and the like, dispersed in the resinous material.
According to the quantum dot display panel provided by the embodiment of the invention, an ultraviolet light backlight module and a white light backlight module are selected, a red light quantum dot color film structure is arranged on the light emitting side closest to the ultraviolet light backlight module, a green light quantum dot color film structure is arranged on the side, away from the ultraviolet light backlight module, of the red light quantum dot color film structure, and a blue light quantum dot color film structure is arranged on the side, away from the ultraviolet light backlight module, of the green light quantum dot color film structure and a white light transparent area is further arranged; and the vertical projection of the white light transmitting sub-area on the plane of the backlight module, the vertical projection of the red light quantum dot substructure on the plane of the backlight module, the vertical projection of the green light quantum dot substructure on the plane of the backlight module and the vertical projection of the blue light quantum dot substructure on the plane of the white light backlight module are not overlapped. According to the embodiment of the invention, firstly, the ultraviolet light backlight module and the white light backlight module realize pixel level backlight, can be matched with active light emitting Micro-LEDs and OLED display devices for use, and have wider application fields, and simultaneously, the red light quantum dot color film structure, the green light quantum dot color film structure and the blue light quantum dot color film structure are excited by ultraviolet light to respectively emit red light, green light and blue light; secondly, the red light quantum dot color film structure, the green light quantum dot color film structure and the blue light quantum dot color film structure are independently arranged, and the red light quantum dot color film, the green light quantum dot color film structure and the blue light quantum dot color film structure after color conversion can be prevented from being filtered by using a color filter through the superposition of multilayer patterned quantum dot color films, so that the luminous efficiency is improved, the direct mixing of quantum dot materials with different lights can be avoided, the mutual influence interference of quantum dots with different lights can be avoided, the performance of the quantum dots can be optimized, the reliability of the quantum dot color film structure can be ensured, and the reabsorption of the long-wave quantum dot material on the light emitted by the short-wave quantum dot material can be reduced; in addition, the shading retaining wall is arranged between the adjacent pixel units to avoid the optical crosstalk phenomenon, and the display resolution is further improved.
Based on the same inventive concept, an embodiment of the present invention further provides a quantum dot display device, fig. 4 is a schematic structural diagram of the quantum dot display device provided in the embodiment of the present invention, and as shown in fig. 4, the quantum dot display device 20 includes the quantum dot display panel 10 according to any embodiment of the present invention, so that the quantum dot display device 20 provided in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and explanations of structures and terms that are the same as or corresponding to those in the embodiments are not repeated herein. The quantum dot display device 20 provided by the embodiment of the present invention may be a mobile phone shown in fig. 4, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A quantum dot display panel, comprising:
the backlight module comprises an ultraviolet light backlight module and a white light backlight module;
the quantum dot color film structure and the white light transmission area are positioned on the light emitting side of the backlight module, the quantum dot color film structure covers the ultraviolet backlight module, and the white light transmission area covers the white light backlight module; the quantum dot color film structure comprises a red light quantum dot color film structure, a green light quantum dot color film structure and a blue light quantum dot color film structure; the red light quantum dot color film structure comprises a plurality of red light quantum dot substructures, the green light quantum dot color film structure comprises a plurality of green light quantum dot substructures, the blue light quantum dot color film structure comprises a plurality of blue light quantum dot substructures, the white light transmission region comprises a plurality of white light transmission sub-regions, and the vertical projections of the red light quantum dot substructures, the green light quantum dot substructures, the blue light quantum dot substructures and the white light transmission sub-regions on the plane of the backlight module are not overlapped.
2. The quantum dot display panel according to claim 1, wherein the red light quantum dot color film structure is located on a light exit side of the ultraviolet light backlight module;
the green light quantum dot color film structure is positioned on one side of the red light quantum dot color film structure, which is far away from the ultraviolet light backlight module;
the blue light quantum dot color film structure is positioned on one side of the green light quantum dot color film structure, which is far away from the ultraviolet light backlight module.
3. The quantum dot display panel according to claim 1, wherein the red light quantum dot color film structure, the green light quantum dot color film structure, and the blue light quantum dot color film structure are disposed in the same layer.
4. The quantum dot display panel of claim 3, wherein the red quantum dot sub-structure forms a red sub-pixel; the green light quantum dot sub-structure forms a green light sub-pixel; the blue light quantum dot sub-structure forms a blue light sub-pixel, and the white light transmitting sub-area forms a white light sub-pixel;
each adjacent red photon pixel, green light sub-pixel, blue light sub-pixel and white photon pixel form a pixel unit; and a shading retaining wall is arranged between the adjacent pixel units.
5. The quantum dot display panel according to claim 4, wherein the light blocking wall comprises an organic material and an opaque material dispersed in the organic material;
the opaque material includes at least one of an inorganic non-metallic material, a black metal oxide material, or an organic black pigment.
6. The quantum dot display panel according to claim 1, wherein the ultraviolet backlight module comprises a plurality of ultraviolet OLED light emitting elements or ultraviolet micro-LEDs arranged in an array;
the white light backlight module comprises a plurality of white light OLED light emitting elements or white light micro-LEDs which are arranged in an array.
7. The quantum dot display panel according to claim 1,
the range of the peak wavelength of the emergent light of the ultraviolet light backlight module is 230-390 nm;
the peak wavelength range of the emergent light of the white light backlight module is 312-660 nm.
8. The quantum dot display panel according to claim 1, wherein the peak wavelength range of the emergent light of the red light quantum dot substructure is 600-660nm, and the half-wave width of the emergent light is less than 35 nm;
the peak wavelength range of emergent light of the green light quantum dot substructure is 520-560nm, and the half-wave width of the emergent light is less than 35 nm;
the peak wavelength range of the emergent light of the blue light quantum dot substructure is 420-480nm, and the half-wave width of the emergent light is less than 20 nm.
9. The quantum dot display panel of claim 1, further comprising a water oxygen barrier layer;
the water oxygen barrier layer is including being located the various membrane structure of quantum dot is close to the first water oxygen barrier layer of backlight unit one side, and/or, is located the various membrane structure of quantum dot is kept away from the second water oxygen barrier layer of backlight unit one side.
10. A quantum dot display device comprising the quantum dot display panel according to any one of claims 1 to 9.
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| CN114038881A (en) * | 2021-09-23 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Display panel and preparation method thereof |
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