CN110058449B - Quantum dot liquid crystal display - Google Patents
Quantum dot liquid crystal display Download PDFInfo
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- CN110058449B CN110058449B CN201910393239.2A CN201910393239A CN110058449B CN 110058449 B CN110058449 B CN 110058449B CN 201910393239 A CN201910393239 A CN 201910393239A CN 110058449 B CN110058449 B CN 110058449B
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- 239000002096 quantum dot Substances 0.000 title claims abstract description 174
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 109
- 239000010408 film Substances 0.000 claims description 171
- 239000012788 optical film Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 12
- 229910000673 Indium arsenide Inorganic materials 0.000 claims description 6
- 229910018219 SeTe Inorganic materials 0.000 claims description 6
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 claims description 6
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 claims description 6
- SBIBMFFZSBJNJF-UHFFFAOYSA-N selenium;zinc Chemical compound [Se]=[Zn] SBIBMFFZSBJNJF-UHFFFAOYSA-N 0.000 claims description 6
- FESBVLZDDCQLFY-UHFFFAOYSA-N sete Chemical compound [Te]=[Se] FESBVLZDDCQLFY-UHFFFAOYSA-N 0.000 claims description 6
- 230000010287 polarization Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 description 15
- 230000000007 visual effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000005855 radiation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
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- 238000005215 recombination Methods 0.000 description 4
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- 230000007704 transition Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
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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
- G02F1/133528—Polarisers
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
-
- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
- G02F1/133507—Films for enhancing the luminance
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
A quantum dot liquid crystal display, comprising: a liquid crystal display panel and a backlight module; the liquid crystal display panel comprises a first quantum dot film layer and the backlight moduleA second quantum dot film layer; the relationship between the film thickness y of the second quantum dot film layer and the film thickness x of the first quantum dot film layer is as follows: y is 0.264/T2 x2-0.9312x + T1; the T1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer is matched with the backlight module to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer is thick when the liquid crystal display panel is matched to obtain the best white picture.
Description
Technical Field
The invention relates to the technical field of display, in particular to a quantum dot liquid crystal display.
Background
At present, Quantum Dot materials (QDs) have excellent properties such as high color purity and continuously adjustable spectrum, so that the QDs are the most excellent luminescent materials in the 21 st century, and can greatly improve the color expression of the existing LCDs in the display color gamut, and thus, the display applications thereof have been widely studied in recent years. The existing QD-OC (quantum dot liquid crystal display) panel has the advantages of extremely large visual angle and high color gamut. The viewing angle of the existing common liquid crystal display television sold in the market in mass production is about 60 degrees, and the viewing angle of the quantum dot television is about 80 degrees. In the prior art, a quantum dot film layer is introduced to a polarizing layer on one side of a TFT array substrate and is attached to the outer side (QD-POL) of the polarizing layer to improve the viewing angle to more than 140 degrees, but the ideal requirements of high color gamut, wide viewing angle and high energy efficiency are difficult to achieve due to the low excitation efficiency.
In summary, when the quantum dot film layer is attached to the polarizing layer or the color filter layer in the conventional quantum dot liquid crystal display, it is difficult to meet the ideal requirements of high color gamut, wide viewing angle and high energy efficiency due to the low excitation efficiency, which further results in poor display effect.
Disclosure of Invention
The invention provides a novel quantum dot liquid crystal display, which can improve the display effect of the quantum dot liquid crystal display and solve the technical problem that when a quantum dot film layer is attached to a polarizing layer or a color filter layer in the conventional quantum dot liquid crystal display, the ideal requirements of high color gamut, wide viewing angle and high energy efficiency are difficult to achieve due to the excitation efficiency, and the display effect is further poor.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a quantum dot liquid crystal display, comprising: the backlight module comprises a liquid crystal display panel and a backlight module positioned below the liquid crystal display panel; the liquid crystal display panel comprises a first quantum dot film layer, and the backlight module comprises a second quantum dot film layer; the relation between the film thickness y of the second quantum dot film layer and the film thickness x of the first quantum dot film layer is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
the T1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer is matched with the backlight module to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer is thick when the liquid crystal display panel is matched to obtain the best white picture.
According to a preferred embodiment of the present invention, the thickness x of the first quantum dot film layer is in a range of 0 to 50 micrometers, and the thickness y of the second quantum dot film layer is in a range of 0 to 100 micrometers.
According to a preferred embodiment of the present invention, in the quantum dot liquid crystal display, the backlight module includes a blue backlight and the second quantum dot film, and the liquid crystal display panel includes, from bottom to top, the first quantum dot film, the first optical film, the lower polarizer, the TFT array substrate, the liquid crystal layer, the color film substrate, and the upper polarizer.
According to a preferred embodiment of the present invention, in the quantum dot liquid crystal display, the backlight module includes a blue backlight plate, the second quantum dot film layer, and the second optical film layer, which are stacked from bottom to top, and the liquid crystal display panel includes the first quantum dot film layer, the first optical film layer, the lower polarizing layer, the TFT array substrate, the liquid crystal layer, the color film substrate, and the upper polarizing layer, which are stacked from bottom to top.
According to a preferred embodiment of the present invention, in the quantum dot liquid crystal display, the backlight module includes a blue backlight plate, the second quantum dot film layer, and a third optical film layer, which are stacked from bottom to top, and the liquid crystal display panel includes the first quantum dot film layer, the lower polarizing layer, the TFT array substrate, the liquid crystal layer, the color film substrate, and the upper polarizing layer, which are stacked from bottom to top.
According to a preferred embodiment of the present invention, in the quantum dot liquid crystal display, the backlight module includes a blue backlight plate, the second quantum dot film layer, and a third optical film layer, which are stacked from bottom to top, and the liquid crystal display panel includes a TFT array substrate, a liquid crystal layer, the first quantum dot film layer, and a color film substrate, which are stacked from bottom to top.
According to a preferred embodiment of the present invention, the first optical film is a prism sheet.
According to a preferred embodiment of the present invention, the second optical film is a reflective polarized brightness enhancement film.
According to a preferred embodiment of the present invention, the third optical film layer includes a prism sheet and a reflective polarization brightness enhancement film stacked from bottom to top.
According to a preferred embodiment of the present invention, the first quantum dot film layer and the second quantum dot film layer are made of a material including a luminescent core and an inorganic protective shell layer covering the luminescent core, and the red light material of the luminescent core includes CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
The invention has the beneficial effects that: according to the quantum dot liquid crystal display provided by the invention, the quantum dot film layers with certain thicknesses are arranged on the liquid crystal display panel and the backlight module below the liquid crystal display panel, so that the visual angle of the quantum dot liquid crystal display is increased, the energy consumption of the quantum dot liquid crystal display is further reduced, and the display effect of the quantum dot liquid crystal display is further improved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a quantum dot liquid crystal display according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of a quantum dot liquid crystal display according to a second embodiment of the invention.
Fig. 3 is a schematic structural diagram of a quantum dot liquid crystal display according to a third embodiment of the invention.
Fig. 4 is a schematic structural diagram of a quantum dot liquid crystal display according to a fourth embodiment of the invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Aiming at the existing quantum dot liquid crystal display, when the quantum dot film layer is attached to the polarizing layer or the color filter layer, the ideal requirements of high color gamut, wide viewing angle and high energy efficiency are difficult to achieve due to the low excitation efficiency, and the technical problem of poor display effect is further caused.
Fig. 1 is a schematic structural diagram of a quantum dot liquid crystal display according to a first embodiment of the present invention. The invention provides a quantum dot liquid crystal display, which comprises: a liquid crystal display panel 10 and a backlight module 20 located below the liquid crystal display panel 10; the backlight module 20 includes a blue backlight plate 21 and the second quantum dot film layer 22, and the liquid crystal display panel 10 includes, from bottom to top, the first quantum dot film layer 11, the first optical film layer 12, the lower polarizing layer 13, the TFT array substrate 14, the liquid crystal layer 15, the color film substrate 16, and the upper polarizing layer 17.
Specifically, the relationship between the film thickness y of the second quantum dot film layer 22 and the film thickness x of the first quantum dot film layer 11 is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
t1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer 22 is the film thickness when the backlight module 20 is matched to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer 11 is thick when the liquid crystal display panel 10 is matched to obtain an optimal white picture.
Specifically, the film thickness x of the first quantum dot film layer 11 ranges from 0 to 50 micrometers, and the film thickness y of the second quantum dot film layer 22 ranges from 0 to 100 micrometers.
Specifically, the first optical film 12 is a prism sheet.
Specifically, the first quantum dot film layer 11 and the second quantum dot film layer 22 are made of materials including a luminescent core and an inorganic protective shell layer wrapped outside the luminescent core, and the red light material of the luminescent core includes CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
Specifically, when light is emitted from the blue backlight plate 21, excitation light with a narrower full width at half maximum is excited through the second quantum dot film layer 22, and excitation light with a narrower full width at half maximum is excited through the first quantum dot film layer 11, so that the color gamut range of the display device can be increased, and the picture quality can be improved. The quantum dots have light conversion capability, so that under the condition of being excited by blue light, electron transition occurs, and then the recombination of electron holes is completed in the form of fluorescent radiation; as a typical zero-dimensional nano material, the quantum dots have the size within the quantum confinement range in each direction, so that the fluorescent radiation has no direction selectivity, and the fluorescence can be radiated in a non-differentiated manner at 360 degrees after being excited, thereby effectively balancing the brightness of each visual angle of the liquid crystal display.
Fig. 2 is a schematic structural diagram of a quantum dot liquid crystal display according to a second embodiment of the present invention. Which comprises the following steps: a liquid crystal display panel 10 and a backlight module 20 located below the liquid crystal display panel 10; the backlight module 20 includes a blue backlight plate 21, a second quantum dot film layer 22, and a second optical film layer 23, which are stacked from bottom to top, and the liquid crystal display panel 10 includes a first quantum dot film layer 11, a first optical film layer 12, a lower polarizing layer 13, a TFT array substrate 14, a liquid crystal layer 15, a color film substrate 16, and an upper polarizing layer 17, which are stacked from bottom to top.
Specifically, the relationship between the film thickness y of the second quantum dot film layer 22 and the film thickness x of the first quantum dot film layer 11 is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
t1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer 22 is the film thickness when the backlight module 20 is matched to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer 11 is thick when the liquid crystal display panel 10 is matched to obtain an optimal white picture.
Specifically, the film thickness x of the first quantum dot film layer 11 ranges from 0 to 50 micrometers, and the film thickness y of the second quantum dot film layer 22 ranges from 0 to 100 micrometers.
Specifically, the first optical film layer 12 is a prism sheet; the second optical film layer 23 is a reflective polarized brightness enhancement film.
Specifically, the first quantum dot film layer 11 and the second quantum dot film layer 22 are made of materials including a luminescent core and an inorganic protective shell layer wrapped outside the luminescent core, and the red light material of the luminescent core includes CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
Specifically, when light is emitted from the blue backlight plate 21, excitation light with a narrower half-height width is excited through the second quantum dot film layer 22, the brightness of the excitation light is increased through the second optical film layer 23, and excitation light with a narrower half-height width is excited through the first quantum dot film layer 11, so that the color gamut range of the display device can be increased, and the picture quality can be improved. The quantum dots have light conversion capability, so that under the condition of being excited by blue light, electron transition occurs, and then the recombination of electron holes is completed in the form of fluorescent radiation; as a typical zero-dimensional nano material, the quantum dots have the size within the quantum confinement range in each direction, so that the fluorescent radiation has no direction selectivity, and the fluorescence can be radiated in a non-differentiated manner at 360 degrees after being excited, thereby effectively balancing the brightness of each visual angle of the liquid crystal display.
Fig. 3 is a schematic structural diagram of a quantum dot liquid crystal display according to a third embodiment of the present invention. Which comprises the following steps: a liquid crystal display panel 10 and a backlight module 20 located below the liquid crystal display panel 10; the backlight module 20 includes a blue backlight plate 21, the second quantum dot film layer 22, and a third optical film layer 24, which are stacked from bottom to top, and the liquid crystal display panel 10 includes the first quantum dot film layer 11, the lower polarizing layer 13, the TFT array substrate 14, the liquid crystal layer 15, the color film substrate 16, and the upper polarizing layer 17, which are stacked from bottom to top.
Specifically, the relationship between the film thickness y of the second quantum dot film layer 22 and the film thickness x of the first quantum dot film layer 11 is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
t1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer 22 is the film thickness when the backlight module 20 is matched to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer 11 is thick when the liquid crystal display panel 10 is matched to obtain an optimal white picture.
Specifically, the film thickness x of the first quantum dot film layer 11 ranges from 0 to 50 micrometers, and the film thickness y of the second quantum dot film layer 22 ranges from 0 to 100 micrometers.
Specifically, the third optical film layer 24 includes a prism sheet 12 and a reflective polarization brightness enhancement film 23 stacked from bottom to top.
Specifically, the first quantum dot film layer 11 and the second quantum dot filmThe layer 22 comprises a luminescent core and an inorganic protective shell layer coated outside the luminescent core, and the red light material of the luminescent core comprises CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
Specifically, when light is emitted from the blue backlight board 21, excitation light with a narrower half-height width is excited through the second quantum dot film layer 22, the brightness of the excitation light is increased through the third optical film layer 24, and excitation light with a narrower half-height width is excited through the first quantum dot film layer 11, so that the color gamut range of the display device can be increased, and the picture quality can be improved. The quantum dots have light conversion capability, so that under the condition of being excited by blue light, electron transition occurs, and then the recombination of electron holes is completed in the form of fluorescent radiation; as a typical zero-dimensional nano material, the quantum dots have the size within the quantum confinement range in each direction, so that the fluorescent radiation has no direction selectivity, and the fluorescence can be radiated in a non-differentiated manner at 360 degrees after being excited, thereby effectively balancing the brightness of each visual angle of the liquid crystal display.
Fig. 4 is a schematic structural diagram of a quantum dot liquid crystal display according to a fourth embodiment of the present invention. Which comprises the following steps: a liquid crystal display panel 10 and a backlight module 20 located below the liquid crystal display panel 10; the backlight module 20 comprises a blue backlight plate 21, a second quantum dot film layer 22 and a third optical film layer 24 which are stacked from bottom to top, and the liquid crystal display panel 10 comprises a TFT array substrate 14, a liquid crystal layer 15, a first quantum dot film layer 11 and a color film substrate 16 which are stacked from bottom to top; the first quantum dot film layer 11 and the color film substrate 16 form a quantum dot color film substrate structure (QD-CF).
Specifically, the relationship between the film thickness y of the second quantum dot film layer 22 and the film thickness x of the first quantum dot film layer 11 is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
t1 is a liquid crystal display panel without a quantum dot film layer, and the film thickness of the second quantum dot film layer 22 is the film thickness when the backlight module 20 is matched to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer 11 is thick when the liquid crystal display panel 10 is matched to obtain an optimal white picture.
Specifically, the film thickness x of the first quantum dot film layer 11 ranges from 0 to 50 micrometers, and the film thickness y of the second quantum dot film layer 22 ranges from 0 to 100 micrometers.
Specifically, the third optical film layer 24 includes a prism sheet 12 and a reflective polarization brightness enhancement film 23 stacked from bottom to top.
Specifically, the first quantum dot film layer 11 and the second quantum dot film layer 22 are made of materials including a luminescent core and an inorganic protective shell layer wrapped outside the luminescent core, and the red light material of the luminescent core includes CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
Specifically, when light is emitted from the blue backlight board 21, excitation light with a narrower full width at half maximum is excited through the second quantum dot film layer 22, the brightness of the excitation light is increased through the third optical film layer 24, and then the excitation light with a narrower full width at half maximum is excited through the first quantum dot film layer 11 on the quantum dot color film substrate structure (QD-CF), so that the color gamut range of the display device can be increased, and the picture quality can be improved. The quantum dots have light conversion capability, so that under the condition of being excited by blue light, electron transition occurs, and then the recombination of electron holes is completed in the form of fluorescent radiation; as a typical zero-dimensional nano material, the quantum dots have the size within the quantum confinement range in each direction, so that the fluorescent radiation has no direction selectivity, and the fluorescence can be radiated in a non-differentiated manner at 360 degrees after being excited, thereby effectively balancing the brightness of each visual angle of the liquid crystal display.
The invention relates to a quantum dot liquid crystal display, which establishes a universally applicable simulation model of the relation between the film thickness of a backlight quantum dot layer and the film thickness of a quantum dot layer on a liquid crystal display panel through basic spectrum data collection and simulation: the relationship between the film thickness y of the second quantum dot film layer 22 and the film thickness x of the first quantum dot film layer 11 is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
the calculation model and the simulation method are suitable for a quantum dot resin mixed system capable of forming a film generally.
Compared with the quantum dot liquid crystal display with the existing structure, the quantum dot liquid crystal display has wider visual angle and higher energy efficiency. The quantum dot film layer is introduced into the backlight module, so that the using amount of the quantum dot film layer in the liquid crystal display panel can be greatly reduced, the brightness of the module is obviously improved, and the energy consumption is reduced; on the other hand, the viewing angle can be increased significantly. Therefore, the display structure is novel, high in color gamut, wide in visual angle, high in energy efficiency and suitable for mass production.
The invention has the beneficial effects that: according to the quantum dot liquid crystal display provided by the invention, the quantum dot film layers with certain thicknesses are arranged on the liquid crystal display panel and the backlight module below the liquid crystal display panel, so that the visual angle of the quantum dot liquid crystal display is increased, the energy consumption of the quantum dot liquid crystal display is further reduced, and the display effect of the quantum dot liquid crystal display is further improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (9)
1. A quantum dot liquid crystal display, comprising: the backlight module comprises a liquid crystal display panel and a backlight module positioned below the liquid crystal display panel; the liquid crystal display panel comprises a first quantum dot film layer, and the backlight module comprises a second quantum dot film layer; the relation between the film thickness y of the second quantum dot film layer and the film thickness x of the first quantum dot film layer is shown as the following formula:
y＝0.264/T2*x2-0.9312x+T1；
the film thickness x of the first quantum dot film layer ranges from 0 micron to 50 microns, and the film thickness y of the second quantum dot film layer ranges from 0 micron to 100 microns; t1 is a liquid crystal display panel without quantum dot film layer, and the film thickness of the second quantum dot film layer is matched with the backlight module to obtain the best white picture; t2 is a backlight module without a quantum dot film layer, and the film thickness of the first quantum dot film layer is thick when the liquid crystal display panel is matched to obtain the best white picture.
2. The quantum dot liquid crystal display of claim 1, wherein the backlight module comprises a blue backlight plate and the second quantum dot film layer, and the liquid crystal display panel comprises, from bottom to top, the first quantum dot film layer, the first optical film layer, the lower polarizing layer, the TFT array substrate, the liquid crystal layer, the color film substrate, and the upper polarizing layer.
3. The quantum dot liquid crystal display of claim 1, wherein the backlight module comprises a blue backlight plate, the second quantum dot film layer and a second optical film layer which are stacked from bottom to top, and the liquid crystal display panel comprises the first quantum dot film layer, the first optical film layer, a lower polarizing layer, a TFT array substrate, a liquid crystal layer, a color film substrate and an upper polarizing layer which are stacked from bottom to top.
4. The quantum dot liquid crystal display of claim 1, wherein the backlight module comprises a blue backlight plate, the second quantum dot film layer and a third optical film layer which are stacked from bottom to top, and the liquid crystal display panel comprises the first quantum dot film layer, a lower polarizing layer, a TFT array substrate, a liquid crystal layer, a color film substrate and an upper polarizing layer which are stacked from bottom to top.
5. The quantum dot liquid crystal display of claim 1, wherein the backlight module comprises a blue backlight plate, the second quantum dot film layer and a third optical film layer which are stacked from bottom to top, and the liquid crystal display panel comprises a TFT array substrate, a liquid crystal layer, the first quantum dot film layer and a color film substrate which are stacked from bottom to top.
6. The quantum dot liquid crystal display of claim 2 or 3, wherein the first optical film layer is a prism sheet.
7. The quantum dot liquid crystal display of claim 3, wherein the second optical film layer is a reflective polarizing brightness enhancement film.
8. The quantum dot liquid crystal display of claim 4 or 5, wherein the third optical film layer comprises a prism sheet and a reflective polarization brightness enhancement film which are stacked from bottom to top.
9. The quantum dot liquid crystal display of claim 1, wherein the first quantum dot film layer and the second quantum dot film layer are made of a material comprising a luminescent core and an inorganic protective shell layer wrapping the luminescent core, and the red light material of the luminescent core comprises CdSe and Cd2One or more of SeTe and InAs; the green material of the luminescent core comprises ZnCdSe2InP and Cd2One or more of SSe; the inorganic protective shell layer comprises CdS, ZnSe and ZnCdS2One or more of ZnS and ZnO.
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| CN201910393239.2A CN110058449B (en) | 2019-05-13 | 2019-05-13 | Quantum dot liquid crystal display |
| PCT/CN2019/106160 WO2020228210A1 (en) | 2019-05-13 | 2019-09-17 | Quantum dot liquid crystal display |
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| KR101581762B1 (en) * | 2014-06-27 | 2016-01-04 | 엘지전자 주식회사 | Back light unit and display device having the same |
| CN105137651B (en) * | 2015-06-30 | 2017-12-05 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN105223724B (en) * | 2015-10-08 | 2018-04-27 | 深圳市华星光电技术有限公司 | Quantum dot liquid crystal display device |
| CN107608128A (en) * | 2017-08-02 | 2018-01-19 | 天津纳美纳米科技有限公司 | A kind of LCD backlight component of high efficiency quantum dot film |
| CN207114972U (en) * | 2017-08-02 | 2018-03-16 | 天津纳美纳米科技有限公司 | The separated LCD backlight component of red, green quantum dot |
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| CN108828836A (en) * | 2018-07-25 | 2018-11-16 | 惠州市华星光电技术有限公司 | Compound polaroid and liquid crystal display |
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