CN107942573B - Liquid crystal display device with a light guide plate - Google Patents
Liquid crystal display device with a light guide plate Download PDFInfo
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- CN107942573B CN107942573B CN201711157519.0A CN201711157519A CN107942573B CN 107942573 B CN107942573 B CN 107942573B CN 201711157519 A CN201711157519 A CN 201711157519A CN 107942573 B CN107942573 B CN 107942573B
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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
Abstract
The present invention provides a liquid crystal display device comprising a liquid crystal layer containing pumice-like TiO2A quantum dot film of particles, which can be used as an independent optical film arranged between the backlight module and the liquid crystal display panel or as a part of the color filter arranged in the color filter, wherein the pumice-shaped TiO film2The particles have a scattering function, so that the light conversion efficiency of the quantum dots can be improved, and the backlight utilization efficiency of the liquid crystal display can be further improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display.
Background
With the development of Display technology, flat panel Display devices such as liquid Crystal displays (L liquid Crystal displays, L CDs) have advantages such as high image quality, power saving, thin body, and no radiation, and thus are widely used in various consumer electronics products such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, and desktop computers, and are becoming the mainstream of Display devices.
Most of the existing liquid crystal displays in the market are Backlight type liquid crystal displays, which include a housing, a liquid crystal display panel disposed in the housing, and a Backlight Module (Backlight Module) disposed in the housing.
The traditional liquid crystal display panel is formed by attaching a Thin Film transistor Array Substrate (TFT Array Substrate) and a Color Filter Substrate (CF), wherein a pixel electrode and a common electrode are respectively formed on the TFT Substrate and the CF Substrate, and liquid crystal is filled between the TFT Substrate and the CF Substrate.
Quantum Dot (QD) materials have the characteristics of narrow wavelength (small half-wave peak) and bright color (high color concentration) due to the excitation light, and have the advantages of easy adjustment of peak position, etc., and have been studied in recent years, which is considered as an effective method for realizing high color saturation of L CD panels.
In order to improve the light conversion efficiency of QD film and QD CF, scattering particles are added into QD film and QD CF. After the scattering particles are added, the probability of the propagation direction of the exciting light is increased, so that the original light path with total reflection can be broken, and the exciting light is transmitted out; on the other hand, the scattering particles also have a scattering effect on the incident backlight, so that the propagation path of the backlight is increased, and the light conversion efficiency is increased; micron-sized spherical SiO2The particles have strong light scattering effect, so the particles are often used as scattering particles in QDfilm and QD CF; however, spherical SiO2The particles often suffer from strong specular reflection while they scatter light, which in turn affects the light conversion efficiency.
Disclosure of Invention
The invention aims to provide a liquid crystal display with higher quantum dot light conversion efficiency and backlight utilization efficiency.
To achieve the above object, the present invention provides a liquid crystal display comprising: the liquid crystal display comprises a backlight module, a liquid crystal display panel arranged above the backlight module and a quantum dot film arranged between the backlight module and the liquid crystal display panel;
the material of the quantum dot film comprises a polymer and quantum dots and pumice TiO dispersed in the polymer2Particles;
the pumice-like TiO2The particles are TiO particles with polymer spheres as cores2The material is core-shell structure particles of a shell;the TiO is2The material has a plurality of pores therein.
The pumice-like TiO2The particle size of the particles is 2-8 μm; the particle size of the polymer ball is 1-7 mu m; the pumice-like TiO2In the particles, the polymer spheres are mixed with TiO2The mass ratio of the materials is 5-10: 1-2; the material of the polymer ball comprises one or more of polystyrene, polymethacrylate, polyethylacrylate, polypropyl acrylate and polybutyl acrylate.
The quantum dots in the quantum dot film comprise one or more of CdSe/ZnS, CdSe/CdS/ZnS and InP/ZnSeS; the particle size of the quantum dots in the quantum dot film is 6-18 nm; in the quantum dot film, the mass percent of the quantum dots is 40-60%, and the pumice TiO is2The mass percentage of the particles is 0.02-0.1%.
The light emitted by the backlight module is blue light, and the quantum dots in the quantum dot film comprise red light quantum dots and green light quantum dots.
Preferably, the liquid crystal display further comprises a band-pass reflection film arranged between the backlight module and the quantum dot film;
the transmittance of the band-pass reflective film to light rays with the wave band of 400 nm-480 nm is more than or equal to 90%, the transmittance to light rays with the wave band of 480 nm-780 nm is less than 10%, namely the reflectivity to light rays with the wave band of 480 nm-780 nm is more than or equal to 90%; the 400 nm-480 nm wave band comprises a blue light wave band emitted by the backlight module; the 480 nm-780 nm wave band comprises a red light wave band excited by the red light quantum dots and a green light wave band excited by the green light quantum dots.
The present invention also provides a liquid crystal display comprising: the backlight module and the liquid crystal display panel are arranged above the backlight module;
the liquid crystal display panel is internally provided with a color filter, the color filter comprises a plurality of sub-pixel units which are arranged in an array, at least one of the sub-pixel units is a quantum dot film, and the material of the quantum dot film comprises a polymer and quantum dots dispersed in the polymer and pumice-shaped TiO2Particles;
the pumice-like TiO2The particles are TiO particles with polymer spheres as cores2The material is core-shell structure particles of a shell; the TiO is2The material has a plurality of pores therein.
The pumice-like TiO2The particle size of the particles is 2-8 μm; the particle size of the polymer ball is 1-7 mu m; the pumice-like TiO2In the particles, the polymer spheres are mixed with TiO2The mass ratio of the materials is 5-10: 1-2; the material of the polymer ball comprises one or more of polystyrene, polymethacrylate, polyethylacrylate, polypropyl acrylate and polybutyl acrylate.
The quantum dots in the quantum dot film comprise one or more of CdSe/ZnS, CdSe/CdS/ZnS and InP/ZnSeS; the particle size of the quantum dots in the quantum dot film is 6-18 nm; in the quantum dot film, the mass percent of the quantum dots is 20-30%, and the pumice TiO is2The mass percentage of the particles is 0.02-0.1%.
The backlight module emits blue light, and the plurality of sub-pixel units comprise a plurality of red sub-pixel units, a plurality of green sub-pixel units and a plurality of blue sub-pixel units; the red sub-pixel unit and the green sub-pixel unit are quantum dot films, quantum dots in the red sub-pixel unit are red light quantum dots, quantum dots in the green sub-pixel unit are green light quantum dots, and the blue sub-pixel unit is a transparent film material.
Preferably, the liquid crystal display further comprises a band-pass reflective film arranged on the light incident side of the color filter;
the transmittance of the band-pass reflective film to light rays with the wave band of 400 nm-480 nm is more than or equal to 90%, the transmittance to light rays with the wave band of 480 nm-780 nm is less than 10%, namely the reflectivity to light rays with the wave band of 480 nm-780 nm is more than or equal to 90%; the 400 nm-480 nm wave band comprises a blue light wave band emitted by the backlight module; the 480 nm-780 nm wave band comprises a red light wave band excited by the red light quantum dots and a green light wave band excited by the green light quantum dots.
The invention has the beneficial effects that: liquid crystal display of the inventionThe device is provided with a catalyst containing pumice TiO2A quantum dot film of particles, which can be used as an independent optical film arranged between the backlight module and the liquid crystal display panel or as a part of the color filter arranged in the color filter, wherein the pumice-shaped TiO film2The particles have a scattering function, so that the light conversion efficiency of the quantum dots can be improved, and the backlight utilization efficiency of the liquid crystal display can be further improved.
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic structural diagram of a liquid crystal display according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of a liquid crystal display according to the invention;
FIG. 3 is a schematic structural diagram of a third embodiment of a liquid crystal display according to the invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of a liquid crystal display according to the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
The invention is based on pumice-like TiO2Particles 60 of said pumice-like TiO2The particle 60 is a TiO particle with a polymer sphere as a core2The material is core-shell structure particles of a shell; the TiO is2The material has multiple holes thereinAnd (4) clearance.
In particular, the pumice-like TiO2The denominations of the particles 60 are: due to pumice TiO2TiO of particle 60 shell2The material has a plurality of pores inside, which is similar to the structural characteristics of pumice, so that the TiO is formed2The particles formed by wrapping polymer spheres by the material are named as pumice-shaped TiO2And particles 60.
In particular, because the pumice-shaped TiO2TiO of particle 60 shell2The material has many micropores inside and high porosity, so the material has good diffuse reflection effect on light and low specular reflectivity, and thus the pumice-shaped TiO of the invention2When the particles 60 are introduced into the quantum dot film (QD film) and the quantum dot color filter (QD CF) as scattering particles, they are similar to those of conventional SiO2The scattering particles can improve the light conversion efficiency of the quantum dots, as compared to the scattering particles. Furthermore, when the quantum dot film and the quantum dot color filter are applied to a liquid crystal display, the backlight utilization efficiency of the liquid crystal display can be improved.
In particular, the pumice-like TiO2The particle diameter of the particle 60 is 2 to 8 μm.
Specifically, the particle size of the polymer ball is 1-7 μm.
Specifically, the material of the polymer ball comprises one or more of polystyrene, polymethacrylate, polyethylacrylate, polypropyl acrylate and polybutyl acrylate.
In particular, the pumice-like TiO2In the particles 60, the polymer spheres are mixed with TiO2The mass ratio of the materials is 5-10: 1-2, preferably 5: 1.
in particular, the pumice-like TiO2The method of making particles 60 comprises:
step 1, providing powdered anatase material (TiO)2) Mixing the anatase material, the polymer spheres and deionized water together, stirring and dispersing for more than 2 hours at the temperature of more than 60 ℃, and then drying to remove moisture to obtain the polymer sphere/anatase core-shell structure material.
Specifically, in the step 1, the method for mixing the anatase material, the polymer spheres and the deionized water together comprises the following steps: adding anatase material and polymer balls into deionized water for dispersion and mixing.
Specifically, in the step 1, the mass ratio of the anatase material, the polymer spheres and the deionized water mixed together is that the anatase material: polymer spheres: 5-10 parts of deionized water: 1-2: 100, preferably 5: 1: 100.
step 2, calcining the polymer sphere/anatase core-shell structure material in the air at a high temperature of more than 900 ℃ for more than 1 hour, and fully calcining to obtain pumice-shaped TiO2And particles 60.
Furthermore, the invention also introduces a Band-pass reflective film (Band-pass reflective film)400, wherein the Band-pass reflective film 400 is generally composed of a plurality of film layers with different refractive indexes, and the technical effects of allowing light of a certain wave Band to transmit and reflecting light of another wave Band can be realized by controlling the thickness of each film layer.
Specifically, the transmittance of the band-pass reflective film 400 to light in a 400 nm-480 nm band is greater than or equal to 90%, the transmittance to light in a 480 nm-780 nm band is less than 10%, that is, the reflectance to light in a 480 nm-780 nm band is greater than or equal to 90%; the 400 nm-480 nm wave band comprises a blue light wave band emitted by the backlight module 100; the 480 nm-780 nm wave band comprises a red light wave band excited by the red light quantum dots 71 and a green light wave band excited by the green light quantum dots 72. That is, the bandpass reflective film 400 has a high transmittance in the blue backlight band, and has a high reflectance in the red light band excited by the red light quantum dots 71 and the green light band excited by the green light quantum dots 72.
Because the emission direction of the excitation light of the quantum dots in the quantum dot film or the quantum dot color filter has the same direction as the backlight incidence direction and the opposite direction to the backlight incidence direction, the part of the excitation light opposite to the backlight incidence direction can cause the loss of the light conversion efficiency, and the band-pass reflection film 400 is introduced into the liquid crystal display device containing the pumice TiO2Below the quantum dot film or quantum dot color filter of the particle 60In this case, the part of the excitation light opposite to the incident direction of the backlight can be reused, and the backlight utilization efficiency of the liquid crystal display can be greatly improved.
Referring to FIGS. 1 to 4, the above-mentioned pumice-like TiO is used2The present invention provides a liquid crystal display comprising the following four embodiments of the particle 60 and the band-pass reflective film 400.
Referring to fig. 1, a liquid crystal display according to a first embodiment of the present invention includes: the liquid crystal display comprises a backlight module 100, a liquid crystal display panel 200 arranged above the backlight module 100 and a quantum dot film 300 arranged between the backlight module 100 and the liquid crystal display panel 200;
the material of the quantum dot film 300 comprises a polymer, and quantum dots 70 and pumice-shaped TiO dispersed in the polymer2And particles 60.
Specifically, the light emitted from the backlight module 100 is blue light, and from the viewpoint of the light emitting color of the quantum dots, the quantum dots 70 in the quantum dot film 300 include red quantum dots 71 and green quantum dots 72.
The quantum dots 70 in the quantum dot film 300 include one or more of CdSe/ZnS, CdSe/CdS/ZnS, InP/ZnSeS, in terms of material composition of the quantum dots.
Specifically, the particle size of the quantum dots 70 in the quantum dot film 300 is 6nm to 18 nm.
Specifically, in the quantum dot film 300, the mass percentage of the quantum dots 70 is 40% to 60%, and the pumice-like TiO is2The mass percentage of the particles 60 is 0.02-0.1%.
Specifically, the polymer in the quantum dot film 300 includes one or more of polymethacrylate and polycarbonate.
Specifically, the liquid crystal display panel 200 includes an upper substrate 10 and a lower substrate 20 disposed opposite to each other, a liquid crystal layer 30 disposed between the upper substrate 10 and the lower substrate 20, an upper polarizer 40 attached to one side of the upper substrate 10 close to the liquid crystal layer 30, and a lower polarizer 50 attached to one side of the lower substrate 20 away from the liquid crystal layer 30.
Specifically, the upper substrate 10 includes a first substrate 11, and a color filter 12 and a black matrix 13 disposed on a side of the first substrate 11 facing the liquid crystal layer 30; the lower substrate 20 includes a second substrate 21 and a TFT layer 22 provided on a side of the second substrate 21 facing the liquid crystal layer 30.
Specifically, the color filter 12 includes a plurality of red sub-pixel units 121, a plurality of green sub-pixel units 122, and a plurality of blue sub-pixel units 123 spaced apart by the black matrix 13 and arranged in an array.
The blue backlight emitted by the backlight module 100 is mixed with the red light and the green light excited by the red light quantum dots 71 and the green light quantum dots 72 in the quantum dot film 300 to form white light, and the white light passes through the red sub-pixel units 121, the green sub-pixel units 122 and the blue sub-pixel units 123 of the color filter 12 to form red light, green light and blue light respectively to be emitted, so as to form three primary colors of red, green and blue of the liquid crystal display panel 200.
Preferably, the first substrate 11 and the second substrate 21 are both glass substrates.
The LCD of the first embodiment comprises pumice-like TiO disposed between the backlight module 100 and the LCD panel 2002 Quantum dot film 300 of particles 60 due to the pumice-like TiO2TiO of particle 60 shell2The material is internally provided with a plurality of micropores and has higher porosity, so that the material has good diffuse reflection effect on light, and simultaneously has very low specular reflectivity, and can improve the light conversion efficiency of the quantum dots 70, thereby improving the backlight utilization efficiency of the liquid crystal display.
Referring to fig. 2, a second embodiment of the lcd according to the present invention is different from the lcd according to the first embodiment shown in fig. 1 in that the lcd further includes a band-pass reflective film 400 disposed between the backlight module 100 and the quantum dot film 300.
The LCD of the second embodiment comprises pumice-shaped TiO disposed between the backlight module 100 and the LCD panel 2002 Quantum dot film 300 of particles 60, using the pumice-like TiO2The scattering function of the particles 60 is improvedThe light conversion efficiency of the quantum dots 70 improves the backlight utilization efficiency of the liquid crystal display, and further, by providing the band-pass reflective film 400 below the quantum dot film 300 (i.e., on the light incident side of the quantum dot film 300), the portion of the excitation light of the quantum dots 70 opposite to the incident direction of the backlight can be utilized, thereby further improving the backlight utilization efficiency.
Referring to fig. 3, a third embodiment of a liquid crystal display according to the present invention includes: a backlight module 100 and a liquid crystal display panel 200 disposed above the backlight module 100;
the liquid crystal display panel 200 is provided with a color filter 12, the color filter 12 includes a plurality of sub-pixel units 120 arranged in an array, at least one of the sub-pixel units 120 is a quantum dot film, and the quantum dot film is made of a polymer, and quantum dots 70 and pumice-shaped TiO dispersed in the polymer2And particles 60.
Specifically, the light emitted from the backlight module 100 is blue light, and the sub-pixel units 120 include a plurality of red sub-pixel units 121, a plurality of green sub-pixel units 122, and a plurality of blue sub-pixel units 123; the red sub-pixel unit 121 and the green sub-pixel unit 122 are quantum dot films, the quantum dots 70 in the red sub-pixel unit 121 are red quantum dots 71, the quantum dots 70 in the green sub-pixel unit 122 are green quantum dots 72, and the blue sub-pixel unit 123 is a transparent film material.
When the blue backlight emitted by the backlight module 100 is incident on the red sub-pixel unit 121, the red light quantum dots 71 are excited to emit red light, when the blue backlight emitted by the backlight module 100 is incident on the green sub-pixel unit 122, the green light quantum dots 72 are excited to emit green light, when the blue backlight emitted by the backlight module 100 is incident on the blue sub-pixel unit 123, the blue light directly passes through the transparent film material to form blue light emission, and thus, red, green and blue three primary colors of the liquid crystal display panel 200 are formed.
Specifically, the liquid crystal display panel 200 includes an upper substrate 10 and a lower substrate 20 disposed opposite to each other, a liquid crystal layer 30 disposed between the upper substrate 10 and the lower substrate 20, an upper polarizer 40 attached to one side of the upper substrate 10 close to the liquid crystal layer 30, and a lower polarizer 50 attached to one side of the lower substrate 20 away from the liquid crystal layer 30;
the upper substrate 10 comprises a first substrate 11, and a color filter 12 and a black matrix 13 which are arranged on one side of the first substrate 11 facing the liquid crystal layer 30, wherein a plurality of sub-pixel units 120 in the color filter 12 are separated by the black matrix 13; the lower substrate 20 includes a second substrate 21 and a TFT layer 22 provided on a side of the second substrate 21 facing the liquid crystal layer 30.
The liquid crystal display of the present invention uses the upper polarizer 40 as a built-in polarizer disposed below the color filter 12, so as to prevent the quantum dots 70 in the color filter 12 from affecting the polarization system.
Preferably, the first substrate 11 and the second substrate 21 are both glass substrates.
The quantum dots 70 in the quantum dot film include one or more of CdSe/ZnS, CdSe/CdS/ZnS, InP/ZnSeS, in terms of material composition of the quantum dots.
Specifically, the particle size of the quantum dots 70 in the quantum dot film is 6nm to 18 nm.
Specifically, in the quantum dot film, the mass percentage of the quantum dots 70 is 20% -30%, and the pumice-shaped TiO is2The mass percentage of the particles 60 is 0.02-0.1%.
Specifically, the polymer in the quantum dot film comprises one or more of polymethacrylate and polycarbonate.
The liquid crystal display of the third embodiment arranges a part of the sub-pixel units 120 of the color filter 12 to contain pumice-like TiO2Quantum dot film of particles 60 due to the pumice-like TiO2TiO of particle 60 shell2The material is internally provided with a plurality of micropores and has higher porosity, so that the material has good diffuse reflection effect on light, and simultaneously has very low specular reflectivity, and can improve the light conversion efficiency of the quantum dots 70, thereby improving the backlight utilization efficiency of the liquid crystal display.
Referring to fig. 4, a fourth embodiment of the lcd according to the present invention is different from the lcd according to the third embodiment shown in fig. 3 in that the lcd further includes a band-pass reflective film 400 disposed on the light incident side of the color filter 12 (i.e., below the color filter 12).
Specifically, the band-pass reflective film 400 is disposed between the color filter 12 and the upper polarizer 40.
The liquid crystal display of the fourth embodiment is manufactured by disposing a part of the sub-pixel units 120 of the color filter 12 to include pumice-like TiO2A quantum dot film of particles 60, using the pumice-like TiO2The scattering function of the particles 60 improves the light conversion efficiency of the quantum dots 70, and improves the backlight utilization efficiency of the liquid crystal display, and further, by providing the band-pass reflection film 400 on the light incident side of the color filter 12, the portion of the excitation light of the quantum dots 70 opposite to the incident direction of the backlight can be utilized, and the backlight utilization efficiency can be further improved.
In summary, the present invention provides a liquid crystal display device, which comprises a layer of pumice-like TiO2A quantum dot film of particles, which can be used as an independent optical film arranged between the backlight module and the liquid crystal display panel or as a part of the color filter arranged in the color filter, wherein the pumice-shaped TiO film2The particles have a scattering function, so that the light conversion efficiency of the quantum dots can be improved, and the backlight utilization efficiency of the liquid crystal display can be further improved.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. A liquid crystal display, comprising: the liquid crystal display comprises a backlight module (100), a liquid crystal display panel (200) arranged above the backlight module (100), and a quantum dot film (300) arranged between the backlight module (100) and the liquid crystal display panel (200);
the material of the quantum dot film (300) comprises a polymer, and quantum dots (70) and pumice-shaped TiO dispersed in the polymer2Particles (60);
the pumice-like TiO2The particle (60) is a TiO particle having a polymer sphere as a core2The material is core-shell structure particles of a shell; the TiO is2The material has a plurality of pores therein.
2. The liquid crystal display of claim 1, wherein the pumice-like TiO is2The particle diameter of the particles (60) is 2-8 μm; the particle size of the polymer ball is 1-7 mu m; the pumice-like TiO2In the particles (60), the polymer spheres are mixed with TiO2The mass ratio of the materials is 5-10: 1-2; the material of the polymer ball comprises one or more of polystyrene, polymethacrylate, polyethylacrylate, polypropyl acrylate and polybutyl acrylate.
3. The liquid crystal display of claim 1, wherein the quantum dots (70) in the quantum dot film (300) comprise one or more of CdSe/ZnS, CdSe/CdS/ZnS, InP/ZnSeS; the particle size of the quantum dots (70) in the quantum dot film (300) is 6-18 nm; in the quantum dot film (300), the mass percent of the quantum dots (70) is 40-60%, and the pumice-shaped TiO is2The mass percentage of the particles (60) is 0.02-0.1%.
4. The lcd of claim 1, wherein the backlight module (100) emits blue light, and the quantum dots (70) in the quantum dot film (300) comprise red quantum dots (71) and green quantum dots (72).
5. The liquid crystal display of claim 4, further comprising a band-pass reflective film (400) disposed between the backlight module (100) and the quantum dot film (300);
the transmittance of the band-pass reflective film (400) to the light with the wave band of 400 nm-480 nm is more than or equal to 90%, the transmittance to the light with the wave band of 480 nm-780 nm is less than 10%, namely the reflectivity to the light with the wave band of 480 nm-780 nm is more than or equal to 90%; the 400 nm-480 nm wave band comprises a blue light wave band emitted by the backlight module (100); the 480 nm-780 nm wave band comprises a red light wave band excited by the red light quantum dots (71) and a green light wave band excited by the green light quantum dots (72).
6. A liquid crystal display, comprising: the backlight module (100) and the liquid crystal display panel (200) are arranged above the backlight module (100);
the liquid crystal display panel (200) is provided with a color filter (12), the color filter (12) comprises a plurality of sub-pixel units (120) which are arranged in an array, at least one of the sub-pixel units (120) is a quantum dot film, and the quantum dot film is made of a polymer, quantum dots (70) dispersed in the polymer and pumice-shaped TiO2Particles (60);
the pumice-like TiO2The particle (60) is a TiO particle having a polymer sphere as a core2The material is core-shell structure particles of a shell; the TiO is2The material has a plurality of pores therein.
7. The liquid crystal display of claim 6, wherein the pumice-like TiO is2The particle diameter of the particles (60) is 2-8 μm; the particle size of the polymer ball is 1-7 mu m; the pumice-like TiO2In the particles (60), the polymer spheres are mixed with TiO2The mass ratio of the materials is 5-10: 1-2; the material of the polymer ball comprises one or more of polystyrene, polymethacrylate, polyethylacrylate, polypropyl acrylate and polybutyl acrylate.
8. The liquid crystal display of claim 6, wherein the quantum dots (70) in the quantum dot film comprise one or more of CdSe/ZnS, CdSe/CdS/ZnS, InP/ZnSeS; of quantum dots (70) in the quantum dot filmThe grain diameter is 6 nm-18 nm; in the quantum dot film, the mass percent of the quantum dots (70) is 20-30%, and the pumice-shaped TiO is2The mass percentage of the particles (60) is 0.02-0.1%.
9. The LCD of claim 6, wherein the light emitted from the backlight module (100) is blue light, and the sub-pixel units (120) comprise red sub-pixel units (121), green sub-pixel units (122), and blue sub-pixel units (123); the red sub-pixel unit (121) and the green sub-pixel unit (122) are quantum dot films, quantum dots (70) in the red sub-pixel unit (121) are red quantum dots (71), quantum dots (70) in the green sub-pixel unit (122) are green quantum dots (72), and the blue sub-pixel unit (123) is a transparent film material.
10. The lcd of claim 9, further comprising a band-pass reflective film (400) disposed on the light-incident side of the color filter (12);
the transmittance of the band-pass reflective film (400) to the light with the wave band of 400 nm-480 nm is more than or equal to 90%, the transmittance to the light with the wave band of 480 nm-780 nm is less than 10%, namely the reflectivity to the light with the wave band of 480 nm-780 nm is more than or equal to 90%; the 400 nm-480 nm wave band comprises a blue light wave band emitted by the backlight module (100); the 480 nm-780 nm wave band comprises a red light wave band excited by the red light quantum dots (71) and a green light wave band excited by the green light quantum dots (72).
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| CN110568659A (en) * | 2018-06-06 | 2019-12-13 | 深圳Tcl新技术有限公司 | Quantum dot pixel photoluminescence liquid crystal display module and manufacturing method thereof |
| 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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