CN119045249A - Reflective display panel and reflective display device - Google Patents
Reflective display panel and reflective display device Download PDFInfo
- Publication number
- CN119045249A CN119045249A CN202411311893.1A CN202411311893A CN119045249A CN 119045249 A CN119045249 A CN 119045249A CN 202411311893 A CN202411311893 A CN 202411311893A CN 119045249 A CN119045249 A CN 119045249A
- Authority
- CN
- China
- Prior art keywords
- light
- layer
- pixel unit
- substrate
- reflective display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 112
- 239000000758 substrate Substances 0.000 claims abstract description 73
- 230000005284 excitation Effects 0.000 claims abstract description 62
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims description 26
- 239000010410 layer Substances 0.000 abstract description 169
- 230000000903 blocking effect Effects 0.000 abstract description 16
- 239000003086 colorant Substances 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 239000002356 single layer Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 31
- 239000002096 quantum dot Substances 0.000 description 19
- 238000005516 engineering process Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 7
- 230000005684 electric field Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000005476 size effect Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- -1 cerium ion Chemical class 0.000 description 3
- 230000005281 excited state Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003094 microcapsule Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- SWGJCIMEBVHMTA-UHFFFAOYSA-K trisodium;6-oxido-4-sulfo-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate Chemical compound [Na+].[Na+].[Na+].C1=CC=C2C(N=NC3=C4C(=CC(=CC4=CC=C3O)S([O-])(=O)=O)S([O-])(=O)=O)=CC=C(S([O-])(=O)=O)C2=C1 SWGJCIMEBVHMTA-UHFFFAOYSA-K 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- JNDMLEXHDPKVFC-UHFFFAOYSA-N aluminum;oxygen(2-);yttrium(3+) Chemical compound [O-2].[O-2].[O-2].[Al+3].[Y+3] JNDMLEXHDPKVFC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000004770 highest occupied molecular orbital Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 238000001748 luminescence spectrum Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910019655 synthetic inorganic crystalline material Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910019901 yttrium aluminum garnet Inorganic materials 0.000 description 1
Classifications
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
-
- 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
- G02F1/133302—Rigid substrates, e.g. inorganic substrates
-
- 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
-
- 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
- G02F1/133514—Colour filters
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Inorganic Chemistry (AREA)
- Liquid Crystal (AREA)
Abstract
本发明公开了一种反射式显示面板及反射式显示装置，反射式显示面板包括第一基板、第二基板以及胆甾相液晶层，胆甾相液晶层在反射态时均反射蓝色光线；反射式显示面板具有多个像素单元，第一基板上设有黑矩阵、色阻层以及光线激发层，色阻层与光线激发层在第一基板上的投影相互重叠，色阻层设于光线激发层远离胆甾相液晶层的一侧；第一基板上设有滤光区和透光区，色阻层和光线激发层相互层叠于滤光区，第一基板在透光区为透明态。通过采用反射蓝色光线的胆甾相液晶层搭配光线激发层和色阻层，并在第一基板上设置滤光区和透光区，反射的蓝色光线可以使得光线激发层激发出对应颜色的光线，从而利用单层胆甾相液晶层也能实现多种颜色的显示。
The present invention discloses a reflective display panel and a reflective display device. The reflective display panel includes a first substrate, a second substrate and a cholesteric liquid crystal layer. The cholesteric liquid crystal layer reflects blue light in a reflective state. The reflective display panel has a plurality of pixel units. A black matrix, a color blocking layer and a light excitation layer are arranged on the first substrate. The projections of the color blocking layer and the light excitation layer on the first substrate overlap each other. The color blocking layer is arranged on a side of the light excitation layer away from the cholesteric liquid crystal layer. A filter area and a light transmission area are arranged on the first substrate. The color blocking layer and the light excitation layer are stacked on each other in the filter area. The first substrate is transparent in the light transmission area. By using a cholesteric liquid crystal layer that reflects blue light in combination with the light excitation layer and the color blocking layer, and arranging a filter area and a light transmission area on the first substrate, the reflected blue light can make the light excitation layer excite light of corresponding colors, so that a single layer of cholesteric liquid crystal layer can also be used to realize the display of multiple colors.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a reflective display panel and a reflective display device.
Background
The display panel has the advantages of light weight, durability, energy conservation, environmental protection, low power consumption and the like, but needs to be matched with a backlight source, so that the module is thick and the cost is high. The electronic paper display (reflective display) is a display meeting the needs of the public, and the electronic paper display can display images by using an external light source, unlike a liquid crystal display which needs a backlight, so that information on the electronic paper can still be clearly seen in an environment with strong outdoor sunlight without a problem of visual angle, and the electronic paper display has been widely applied to electronic readers (such as electronic books and electronic newspapers) or other electronic components (such as price tags) because of the advantages of power saving, high reflectivity, contrast ratio and the like.
Existing electronic paper displays typically employ E-Ink microcapsule technology (microcapsule electronic Ink technology), siPix microcup technology (microcup electrophoretic display technology), bridgestone electronic liquid powder technology, cholesteric liquid crystal display (Cholesteric Liquid CRYSTAL DISPLAY, CLCD) technology, microelectromechanical system (MEMS) technology, or electrowetting (electrowetting) technology. However, the existing electronic paper display technology is not mature relatively to the liquid crystal display technology, the mass production efficiency is low, the manufacturing cost is relatively high, and the existing electronic paper display cannot realize color display.
In the prior art, the electronic tag display device adopting cholesteric liquid crystal molecules has the defects that the cholesteric liquid crystal molecules with one pitch can reflect only one color and transmit light rays with other colors due to the requirement of the pitch of the cholesteric liquid crystal molecules, and the difficulty of arranging the cholesteric liquid crystal molecules with different colors in the same cholesteric liquid crystal box is high, so that the prior art level can not realize or has high cost. Fig. 1 is a schematic structural diagram of a three-layer cholesteric liquid crystal cell used in an electronic tag display device in the prior art, as shown in fig. 1, if white display or color display needs to be achieved, the three-layer cholesteric liquid crystal cell needs to be used in the electronic tag display device to reflect red/green/blue light respectively, so that white display and color display are achieved, but the three-layer cholesteric liquid crystal cell is large in cell thickness and high in cost.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a reflective display panel and a reflective display device, so as to solve the problem that the reflective display device with single-layer cholesteric liquid crystal molecules in the prior art has poor reflective color.
The aim of the invention is achieved by the following technical scheme:
the invention provides a reflective display panel, which comprises a first substrate, a second substrate arranged opposite to the first substrate, and a cholesteric liquid crystal layer positioned between the first substrate and the second substrate, wherein all cholesteric liquid crystal molecules in the cholesteric liquid crystal layer reflect blue light rays in a reflective state, one of the first substrate and the second substrate is an array substrate and is provided with a pixel electrode, and the other is provided with a common electrode matched with the pixel electrode;
The reflective display panel is provided with a plurality of pixel units distributed in an array, a black matrix, a color resistance layer and a light excitation layer are arranged on the first substrate, the black matrix is used for mutually spacing the pixel units, the light excitation layer can absorb blue light and excite light corresponding to the color of the light excitation layer, the projection of the color resistance layer and the light excitation layer on the first substrate are mutually overlapped, and the color resistance layer is arranged on one side of the light excitation layer far away from the cholesteric liquid crystal layer;
the first substrate is provided with a light filtering area and a light transmitting area, the color resistance layer and the light excitation layer are mutually laminated in the light filtering area, and the first substrate is in a transparent state in the light transmitting area.
Further, the plurality of pixel units are provided with a first pixel unit and a second pixel unit, the color resistance layer comprises a red resistance layer and a green resistance layer, the light excitation layer comprises a red light excitation layer and a green light excitation layer, the red resistance layer and the red light excitation layer are mutually laminated in the first pixel unit, and the green resistance layer and the green light excitation layer are mutually laminated in the second pixel unit.
Furthermore, each pixel unit is internally provided with the light filtering area and the light transmitting area.
Further, the light filtering area in each pixel unit is arranged at two sides of the light transmitting area;
or, the filter area in each pixel unit is arranged on one side of the pixel unit, and the light-transmitting area is arranged on the other side of the pixel unit.
Furthermore, a light-shielding retaining wall is arranged in each pixel unit, and the light-shielding retaining wall in each pixel unit is arranged between the light filtering area and the light transmitting area and used for mutually spacing the light filtering area and the light transmitting area.
Further, a third pixel unit is arranged in the pixel units, the light filtering area corresponds to the first pixel unit and the second pixel unit, and the light transmitting area corresponds to the third pixel unit.
Further, the third pixel unit is disposed between the adjacent first pixel unit and the second pixel unit.
Further, a light absorbing layer is disposed on the second substrate, and the light absorbing layer is configured to absorb light passing through the cholesteric liquid crystal layer.
The application also provides a reflective display device comprising the reflective display panel.
Further, the reflective display device further includes a side-in light source module, where the side-in light source module is disposed on a side of the first substrate away from the cholesteric liquid crystal layer and is used for providing a light source toward a side of the cholesteric liquid crystal layer.
The invention has the advantages that the cholesteric liquid crystal layer for reflecting blue light is matched with the light excitation layer, the light filtering area and the light transmitting area are arranged on the first substrate, the reflected blue light can excite the light excitation layer to emit light rays with corresponding colors, so that the display of multiple colors can be realized by utilizing the single-layer cholesteric liquid crystal layer, the color resistance layer is matched with the light excitation layer and arranged on one side of the light excitation layer far away from the cholesteric liquid crystal layer, the blue light which is not utilized by the light excitation layer can be absorbed by the color resistance layer, so that the color of the light emitted by the light filtering area is purer, in addition, the light with different colors from the color resistance layer in the ambient light can be absorbed by the color resistance layer when the ambient light irradiates the light filtering area, and the light excitation layer is prevented from directly exciting the light rays by utilizing the ambient light, thereby influencing the brightness of the pixel unit in a screen or black state.
Drawings
FIG. 1 is a schematic diagram of a prior art reflective display device employing a three-layer cholesteric liquid crystal cell;
FIG. 2 is a schematic diagram of a reflective display device in an initial state according to an embodiment of the invention;
FIG. 3 is a schematic plan view of a first substrate according to a first embodiment of the invention;
FIG. 4 is a schematic plan view of a second substrate according to an embodiment of the invention;
FIG. 5 is a schematic diagram of three state transitions of cholesteric liquid crystal molecules in accordance with an embodiment of the invention;
FIG. 6 is a schematic diagram showing driving signals for three state transitions of cholesteric liquid crystal molecules in accordance with an embodiment of the present invention;
FIG. 7 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-white image using ambient light;
FIG. 8 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-purple image using ambient light;
FIG. 9 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-cyan screen with ambient light;
FIG. 10 is a schematic diagram of a reflective display device according to an embodiment of the invention when the reflective display device displays a gray color image using ambient light;
FIG. 11 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a gray image with ambient light;
FIG. 12 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-white image using a side-in light source;
FIG. 13 is a schematic diagram of a reflective display device according to an embodiment of the invention when a side-in light source is used to display a black-and-purple image;
FIG. 14 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-cyan screen using a side-in light source;
FIG. 15 is a schematic diagram of a reflective display device according to an embodiment of the invention when a side-in light source is used to display a gray-scale screen;
FIG. 16 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a gray image by using a side-in light source;
FIG. 17 is a schematic view of the principle of incident light in the filter region of the reflective display device according to the first embodiment of the present invention;
FIG. 18 is a schematic view of the principle of reflected light in the filter region of the reflective display device according to the first embodiment of the present invention;
FIG. 19 is a schematic view of a reflective display device in an initial state according to a second embodiment of the present invention;
FIG. 20 is a schematic plan view of a first substrate according to a second embodiment of the invention;
Fig. 21 is a schematic structural diagram of a reflective display device in an initial state according to a third embodiment of the present invention;
fig. 22 is a schematic plan view of a first substrate according to a third embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of the reflective display panel and the reflective display device according to the invention by combining the accompanying drawings and the preferred embodiment, wherein:
Example one
Fig. 2 is a schematic structural diagram of a reflective display device in an initial state according to an embodiment of the invention. Fig. 3 is a schematic plan view of a first substrate according to a first embodiment of the invention. Fig. 4 is a schematic plan view of a second substrate according to a first embodiment of the invention.
As shown in fig. 2 to 4, a reflective display panel 10 according to a first embodiment of the present invention includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a cholesteric liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12, wherein all cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 reflect blue light in a reflective state. The first substrate 11 is located at a side of the reflective display panel 10 close to the external environment, and the second substrate 12 is located at a side of the reflective display panel 10 far from the external environment, i.e. ambient light is emitted from the first substrate 11 into the reflective display panel 10. The reflective display panel 10 has a plurality of pixel units P distributed in an array, and the first substrate 11 is provided with a black matrix 111, a color blocking layer 112 and a light excitation layer 113, where the black matrix 111 separates the pixel units P from each other. The light excitation layer 113 is capable of absorbing blue light and exciting light corresponding to the color of the light excitation layer 113, the projections of the color resistance layer 112 and the light excitation layer 113 on the first substrate 11 overlap each other, and the color resistance layer 112 is disposed on a side of the light excitation layer 113 away from the cholesteric liquid crystal layer 13. The first substrate 11 is provided with a light filtering area F and a light transmitting area T, where the color blocking layer 112 and the light exciting layer 113 are stacked on each other, and the first substrate 11 is in a transparent state in the light transmitting area T, for example, the first substrate 11 may be filled in the light transmitting area T by a flat layer (OC material).
When the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 are in a reflective state, the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 are in a lying posture, the cholesteric liquid crystal layer 13 reflects blue light, after passing through the light excitation layer 113, part of the reflected blue light can excite light corresponding to the color of the light excitation layer 113, and after filtering by the color resistance layer 112, the color degree is better, the other part of the reflected blue light can be directly emitted from the light transmission area T, and the blue light emitted from the light transmission area T and the light excitation layer 113 excite the color light to mix with each other, so that light with various colors can be displayed. When the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 are in a transparent state, incident light directly passes through the cholesteric liquid crystal layer 13 to be black, and the color resistance layer 112 can prevent ambient light from directly irradiating the light excitation layer 113, so that the light excitation layer 113 can prevent the light excitation layer 113 from directly exciting light by the ambient light to influence the brightness of the pixel unit P in a screen or black state.
Further, one of the first substrate 11 and the second substrate 12 is an array substrate and is provided with a pixel electrode 121, and the other is provided with a common electrode 114 mated with the pixel electrode 121. In this embodiment, the second substrate 12 is an array substrate and is provided with pixel electrodes 121, the first substrate 11 is provided with a common electrode 114 matching with the pixel electrodes 121, the pixel electrodes 121 are block electrodes corresponding to the pixel units P, and the common electrode 114 is a planar electrode covering the first substrate 11 entirely.
Among them, the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 have three stable textures of P-state (Planar, planar texture state, reflective state), FC-state (Focal Conic, focal conic state, fog state), and H-state (transparent state). The reflection spectrum of the cholesteric liquid crystal molecules in the P state is in a visible spectrum section, the cholesteric liquid crystal molecules reflect bright color light, the specific reflected color of the bright color light can be set according to the pitch of the cholesteric liquid crystal molecules, the cholesteric liquid crystal molecules do not reflect the color light any more in the FC state, the light can be scattered to penetrate the cholesteric liquid crystal molecules, the cholesteric liquid crystal molecules do not reflect the color light any more in the H state, and the light can directly penetrate the cholesteric liquid crystal molecules and also has no scattering effect on light. Under the action of a certain electric field, the three states can be mutually converted.
Fig. 5 is a schematic diagram of three state transitions of a cholesteric liquid crystal molecule in the first embodiment of the present invention, and fig. 6 is a schematic diagram of driving signals of three state transitions of a cholesteric liquid crystal molecule in the first embodiment of the present invention. As shown in fig. 5 and 6, the common voltage signal Vcom is applied to the common electrode 114, the first electric signal V1 is continuously applied to the pixel electrode 121, a voltage difference (about 20V) is provided between the common voltage signal Vcom and the first electric signal V1, a strong vertical electric field is formed between the common electrode 114 and the pixel electrode 121, and the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 rotate and stagnate in the H state (transparent state). The common voltage signal Vcom is applied to the common electrode 114, the second electric signal V2 is applied to the pixel electrode 121, a voltage difference (for example, 20V) is provided between the second electric signal V2 and the common voltage signal Vcom, and the second electric signal V2 gradually becomes the same as the common voltage signal Vcom within a first preset time, that is, the second electric signal V2 has a larger voltage difference from the common voltage signal Vcom, then slowly decreases and is the same as the common voltage signal Vcom, so that a stronger vertical electric field is formed between the common electrode 114 and the pixel electrode 121, and then the vertical electric field slowly disappears, so that the cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 rotate and stagnate in the FC state, which is a scattering state and has a scattering effect. The common voltage signal Vcom is applied to the common electrode 114, the third electric signal V3 is applied to the pixel electrode 121, a voltage difference (for example, 30V) is provided between the third electric signal V3 and the common voltage signal Vcom, and the third electric signal V3 directly changes to be the same as the common voltage signal Vcom at a second preset time, which is smaller than the first preset time, that is, the third electric signal V3 has a larger voltage difference with the common voltage signal Vcom first, then rapidly decreases and is the same as the common voltage signal Vcom, so that a stronger vertical electric field is formed between the common electrode 114 and the pixel electrode 121 first, then the vertical electric field rapidly disappears, so that cholesteric liquid crystal molecules in the cholesteric liquid crystal layer 13 rotate and stagnate in P-state, and are in reflection state. The arrangement directions of cholesteric liquid crystal molecules are different, the reflected visible light spectrums are different, the residual spectrums are transmitted, and the P state and the FC state do not need voltage to be maintained.
The reflection spectrum wavelength (Deltalambda) of the cholesteric liquid crystal molecules is in direct proportion to the spiro moment (Po) and the double refraction index (Deltan) of the cholesteric liquid crystal molecules, wherein the formula is Deltalambda=PoDeltan, and the reflection spectrum wavelength (lambda) of the cholesteric liquid crystal molecules is in direct proportion to the spiro moment (Po) and the double refraction index average value (n) of the cholesteric liquid crystal molecules, and the formula is lambda= nPo. Thus, cholesteric liquid crystal molecules of different pitches can reflect different colors of light in the reflective state. The cholesteric liquid crystal molecules can reflect blue light of a high wave band in a reflection state, the wavelength range of the reflected light is 450-500 nm, the blue light wave band in the ambient light is mainly 450-500 nm, the light excitation layer 113 excited by the blue light in the wave band can be excited by effectively utilizing the ambient light, the wave band of 450-500 nm is beneficial blue light, the damage to retina is large due to 400-450 nm, and the photoreceptor tissues are damaged, so that the cholesteric liquid crystal molecules with the wavelength range of 450-500 nm of the reflected light can have good eye protection effect.
Further, the light excitation layer 113 is made of a Quantum Dot (QD), which is usually a nanoparticle composed of II-Vl or III-V elements, and has a size smaller than or close to the exciton bohr radius (generally not more than 10nm in diameter), and a significant Quantum effect. It is generally considered a quasi-zero-dimensional material, a semiconductor nanostructure that confines conduction band electrons, valence band holes, and excitons in three spatial directions. When the particle size of the nanomaterial drops to a certain value (typically 10nm or less), the electron energy level near the metal fermi level changes from quasi-continuous to discrete energy levels, and the energy gaps of the highest occupied molecular orbital and the lowest unoccupied molecular orbital energy levels of the discontinuous nano-semiconductor particles become wider, thereby causing absorption and blue shift of the fluorescence spectrum peak, which phenomenon is called quantum size effect. The quantum size effect causes great change of photoelectric property of the semiconductor quantum dot, and when the size of the semiconductor quantum dot particles is smaller than the Bohr radius of excitons, the quantum size effect changes the energy level structure of the semiconductor material, so that the semiconductor material is converted from a continuous energy band structure into a discrete energy level structure with molecular characteristics. By utilizing the phenomenon, semiconductor quantum dots with different particle sizes can be prepared in the same reaction to generate light emission with different frequencies, so that various luminous colors can be conveniently regulated and controlled. The energy of the solid absorbed photon (absorption) will be greater than the radiation photon (luminescence), so the luminescence spectrum will be shifted (red-shifted) in a direction of lower energy than the absorption spectrum, the difference in energy of the two photons being called Stokes Shift. Because the quantum dots have narrow emission spectrum, high luminous efficiency and quantum size effect and Stokes spectrum displacement effect, the corresponding quantum dots in the sub-pixels of each color can absorb the light with energy larger than that of the sub-pixel unit color in the light emitted by the backlight source, and efficiently convert the absorbed light into the monochromatic light of the sub-pixel unit color and emit the monochromatic light, so that the color corresponding to the sub-pixel of the color is purer, the saturation is higher, and the transmittance of the light source can be improved. Under the condition of not reducing the yield of the quantum dots, the SiO2 coated CH3NH3PbBr3 quantum dots (MAPB-QDs/SiO 2) are prepared, and the photo stability test shows that after the LED is irradiated for 7 hours at the wavelength of about 470nm, the photoluminescence rate (PL) of the MAPB-QD/SiO2 powder is maintained to be 94.10 percent.
Of course, the light excitation layer 113 may also be made of a fluorescent material, and the light emission principle of the fluorescent material is mainly realized by a fluorescent effect, when the fluorescent powder is irradiated by ultraviolet light or blue light, atoms or molecules inside the fluorescent powder absorb energy of photons, and electrons transition to an excited state to form electrons in the excited state. Electrons in the excited state are unstable and are de-excited in a very short time to return to the ground state. In this process, electrons release energy, which is released as photons, forming visible light. White light is generated by exciting red phosphor, green phosphor, or yellow phosphor with blue light. The pc-wLEDs prepared by using blue In-GaN LED chips with the wavelength of about 460nm and cerium ion (III) -doped yttrium aluminum garnet (Y3 Al5O 12: ce3+, simplified to YAG: ce3+) fluorescent powder has been commercially used.
As shown in fig. 4, the second substrate 12 is provided with a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines are mutually insulated and crossed to define a plurality of pixel units P, the second substrate 12 is provided with a thin film transistor and a pixel electrode 121 in each pixel unit P, and the pixel electrode 121 is electrically connected with the scan lines and the data lines adjacent to the thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, wherein the gate electrode is located on the same layer as the scan line and electrically connected to the scan line, the gate electrode is isolated from the active layer by an insulating layer, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode 121 by a contact hole.
Further, the color resist layer 112 and the light excitation layer 113 overlapped with each other are the same in color. In this embodiment, the plurality of pixel units P have a first pixel unit P1 and a second pixel unit P2, and a row of the first pixel units P1 and a row of the second pixel units P2 are alternately arranged in the row direction. The color resist layer 112 includes a red resist layer 112r and a green resist layer 112g, and the light-exciting layer 113 includes a red light-exciting layer 113r and a green light-exciting layer 113g. The red blocking layer 112r and the red light excitation layer 113r are stacked in the first pixel unit P1, the green blocking layer 112g and the green light excitation layer 113g are stacked in the second pixel unit P2, that is, projections of the red blocking layer 112r and the red light excitation layer 113r on the first substrate 11 overlap each other, and projections of the green blocking layer 112g and the green light excitation layer 113g on the first substrate 11 overlap each other.
Wherein, the size of the red quantum dot is 7nm, the size of the green quantum dot is 3nm, and the size of the blue quantum dot is 2nm. By utilizing the size effect and the Stokes spectrum shift effect of the quantum dots, the red quantum dots can absorb and convert light with light energy larger than red light energy emitted by the light source into monochromatic red light and emit the monochromatic red light, the red light color becomes purer, the green quantum dots can absorb and convert light with light energy larger than green light energy emitted by the light source into monochromatic green light and emit the monochromatic green light, the green light color becomes purer, and the blue quantum dots can absorb and convert light (such as ultraviolet light) with light energy larger than blue light energy emitted by the light source into monochromatic blue light and emit the monochromatic blue light. The application adopts cholesteric liquid crystal molecules to reflect blue light when in a reflection state, so that not only red quantum dots and green quantum dots can excite light with corresponding colors, but also the blue quantum dots can be avoided to reduce the process difficulty.
In this embodiment, as shown in fig. 3, each pixel unit P is provided with a filtering area F and a light-transmitting area T. Optionally, the filter area F in each pixel unit P is disposed at two sides of the light transmission area T, for example, two filter areas F and one light transmission area T are disposed in each pixel unit P, and the two filter areas F are disposed at left and right sides of the light transmission area T respectively. Wherein, for each pixel unit P, the filter area F is the light transmitting area T and the filter area f=0.5:1:0.5 (the width ratio can be adjusted according to the required contrast/NTSC, etc.).
In this embodiment, the light absorbing layer 14 is disposed on the second substrate 12, and the light absorbing layer 14 is used to absorb the light passing through the cholesteric liquid crystal layer 13, so that the brightness of the pixel unit P in the black state can be lower. Wherein the light absorbing layer 14 is disposed on a side of the second substrate 12 away from the cholesteric liquid crystal layer 13.
The present application also provides a reflective display device comprising a reflective display panel 10 as described above.
Further, the reflective display device further includes a side-in light source module 20, where the side-in light source module 20 is disposed on a side of the first substrate 11 away from the cholesteric liquid crystal layer 13 and is used for providing a light source toward a side of the cholesteric liquid crystal layer 13. The side-entering light source module 20 includes a light source 21 and a light guide plate 22, the light source 21 is disposed on a side surface of the light guide plate 22, and a plurality of light guide dots are disposed on the light guide plate 22, and the light guide dots are used for reflecting light emitted by the light source 21 into the reflective display panel 10. Optionally, the light source 21 is configured to provide a white light source, and a blue light band of the white light source is preferably 450-500 nm, and the light guide dots are disposed on a surface of the light guide plate 22 away from the reflective display panel 10.
Fig. 7 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-white image using ambient light. As shown in fig. 7, when the reflective display device displays a black-and-white image by using ambient light, the side-in light source module 20 is turned off, so as to control cholesteric liquid crystal molecules in the corresponding areas of the first pixel unit P1 and the second pixel unit P2 in the white image area to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, and the blue light, the green light and the red light are mixed with each other to form white light, and the cholesteric liquid crystal molecules in the corresponding areas of the first pixel unit P1 and the second pixel unit P2 in the black image area are controlled to be in a transmissive state (for example, a fog state, an FC state, or a transparent state, an H state), and the light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, so as to be in a black state.
Fig. 8 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-violet image by using ambient light. As shown in fig. 8, when the reflective display device displays a purple-black image by using ambient light, the side-incident light source module 20 is turned off, so that cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 in the purple image region are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, and red light and blue light are mixed with each other to form purple light (magenta light, also called magenta light, i.e., shallower purple red), and cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 and the second pixel unit P2 in the black image region are controlled to be in a transmissive state (e.g., fog state, FC state, or transparent state, H state), so that light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, thereby presenting a black state.
Fig. 9 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a cyan/black screen by using ambient light. As shown in fig. 9, when the reflective display device displays a cyan-black image by using ambient light, the side-in light source module 20 is turned off, so that cholesteric liquid crystal molecules in the region corresponding to the second pixel unit P2 in the cyan-black image region are controlled to be in a reflective state, the second pixel unit P2 can reflect blue light and green light, and the blue light and the green light are mixed with each other to form a cyan light, and cholesteric liquid crystal molecules in the region corresponding to the first pixel unit P1 and the second pixel unit P2 in the black image region are controlled to be in a transmissive state (for example, a fog state, an FC state, or a transparent state, or an H state), and the light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, so that the black state is formed.
Fig. 10 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a gray scale image by using ambient light. As shown in fig. 10, when the reflective display device displays a violet gray frame by using ambient light, the side-in light source module 20 is turned off, cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 in the violet frame region are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the red light and the blue light are mixed to form a violet light (magenta light, also called magenta light, i.e. a lighter purplish red light), the cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 and part of the second pixel unit P2 in the gray frame region are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, the red light, the green light and the blue light are mixed to form a white light, and the cholesteric liquid crystal molecules in the corresponding region of the other part of the second pixel unit P2 in the gray frame region are controlled to be in a transmissive state (e.g. a fog state, FC state, or a transparent state, H state), and the light passes through the light absorbing layer 14 from the second pixel unit P2 to form a light absorbing layer, and the black light is mixed to form a black or a gray color.
Fig. 11 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a grey image by using ambient light. As shown in fig. 11, when the reflective display device displays a gray frame by using ambient light, the side-in light source module 20 is turned off, so that the cholesteric liquid crystal molecules in the corresponding region of the second pixel unit P2 in the cyan frame region are controlled to be in a reflective state, the second pixel unit P2 can reflect blue light and green light, and mix with each other to form a blue light, the cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 and the second pixel unit P2 in the gray frame region are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, mix with each other to form a white light by red light, green light and blue light, and the cholesteric liquid crystal molecules in the corresponding region of the other part of the first pixel unit P1 in the gray frame region are controlled to be in a transmissive state (for example, a fog state, FC state, or a transparent state, H state), and the light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 to form a black state, so that the gray frame region is in a gray state and a gray or black color is mixed with each other.
Fig. 12 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a black-and-white image using a side-entry light source. As shown in fig. 12, when the reflective display device displays a black-and-white image by using the side-in light source, the side-in light source module 20 is turned on to control cholesteric liquid crystal molecules in the corresponding areas of the first pixel unit P1 and the second pixel unit P2 in the white image area to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, and the red light, the green light and the blue light are mixed with each other to form white light, and the cholesteric liquid crystal molecules in the corresponding areas of the first pixel unit P1 and the second pixel unit P2 in the black image area are controlled to be in a transmissive state (for example, a fog state, an FC state, or a transparent state, an H state), and the light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, so as to be in a black state.
Fig. 13 is a schematic diagram of a reflective display device according to an embodiment of the invention when a side-in light source is used to display a black-and-violet image. As shown in fig. 13, when the reflective display device displays a purple-black image by using the side-in light source, the side-in light source module 20 is turned on to control cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 in the purple image region to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, and the red light and the blue light are mixed with each other to form purple light (magenta light, also called magenta light, i.e. shallower purple red), and control cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 and the second pixel unit P2 in the black image region to be in a transmissive state (e.g. fog state, FC state, or transparent state, H state), and light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, thereby presenting a black state.
Fig. 14 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a cyan/black screen by using a side-in light source. As shown in fig. 14, when the reflective display device displays a cyan-black image by using the side-in light source, the side-in light source module 20 is turned on to control cholesteric liquid crystal molecules in the region corresponding to the second pixel unit P2 in the cyan-image region to be in a reflective state, the second pixel unit P2 can reflect blue light and green light, and mix with each other to form cyan light, and control cholesteric liquid crystal molecules in the region corresponding to the first pixel unit P1 and the second pixel unit P2 in the black-image region to be in a transmissive state (for example, a fog state, an FC state, or a transparent state, an H state), and light is absorbed by the light absorbing layer 14 after passing through the cholesteric liquid crystal layer 13 from the first pixel unit P1 and the second pixel unit P2, thereby rendering the black state.
Fig. 15 is a schematic diagram of a reflective display device according to an embodiment of the invention when a side-in light source is used to display a gray-scale screen. As shown in fig. 15, when the reflective display device displays a violet gray image by using the side-in light source, the side-in light source module 20 is turned on, so that cholesteric liquid crystal molecules in the corresponding area of the first pixel unit P1 in the violet image area are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, and the red light and the blue light are mixed with each other to form a violet light (magenta light, also called magenta light, i.e., a lighter purplish red light), so that cholesteric liquid crystal molecules in the corresponding area of the first pixel unit P1 and part of the second pixel unit P2 in the gray image area are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, and the red light are mixed with each other to form a white light, and cholesteric liquid crystal molecules in the other part of the corresponding area of the second pixel unit P2 in the gray image area are controlled to be in a transmissive state (e.g., a fog state, an FC state, or a transparent state, an H state), and the light is absorbed by the light from the second pixel unit P2 through the cholesteric liquid crystal layer 13 in the light-absorbing layer 14 in the black image area or the gray image area.
Fig. 16 is a schematic diagram of a reflective display device according to an embodiment of the invention when displaying a grey image by using a side-in light source. As shown in fig. 16, when the reflective display device displays a gray frame using the side-in light source, the side-in light source module 20 is turned on, so that the cholesteric liquid crystal molecules in the corresponding region of the second pixel unit P2 in the cyan frame region are controlled to be in a reflective state, the second pixel unit P2 can reflect blue light and green light, and mix with each other to form a blue light, the cholesteric liquid crystal molecules in the corresponding region of the first pixel unit P1 and the second pixel unit P2 in the gray frame region are controlled to be in a reflective state, the first pixel unit P1 can reflect blue light and red light, the second pixel unit P2 can reflect blue light and green light, and mix with each other to form a white light, and the cholesteric liquid crystal molecules in the corresponding region of the second pixel unit P2 in the gray frame region are controlled to be in a transmissive state (for example, a fog state, an FC state), or a transparent state, an H state), and the light is absorbed by the light absorbing layer 14 after passing through the first pixel unit P1 and passing through the cholesteric liquid crystal layer 13, so that the gray frame region is in a black state, the gray and the gray color is mixed with each other to form a black color or a gray color.
Fig. 17 is a schematic diagram of incident light principle of a filtering area of a reflective display device according to an embodiment of the invention. For the filter region F, as shown in fig. 17, when the pixel unit P is in the inactive or black state, the incident light is filtered through the color blocking layer 112, the filtered light cannot excite the light excitation layer 113 to emit light, and then the light excitation layer 113 and the cholesteric liquid crystal layer 13 are passed through and absorbed by the light absorbing layer 14, so that the pixel unit P is black, so as to reduce the brightness of the pixel unit P in the inactive or black state. Since blue light is mixed in the incident light, if the color resist layer 112 is not provided, the incident light irradiates the light excitation layer 113 to excite the light excitation layer 113, so that the light excitation layer 113 has a certain brightness, and the brightness of the pixel unit P in the off-screen or black state is affected, and the contrast is affected.
Fig. 18 is a schematic view of a reflection principle of a filtering area of a reflective display device according to an embodiment of the invention. As shown in fig. 18, the light-exciting layer 113 cannot use blue light to 100% in the filter region F, so that part of the blue light which is not used is mixed with the light emitted from the light-exciting layer 113, and the blue light which is not used by the light-exciting layer 113 can be filtered by providing the color-blocking layer 112, so that the color purity of the light can be improved.
Example two
Fig. 19 is a schematic view of a reflective display device in an initial state according to a second embodiment of the present invention. Fig. 20 is a schematic plan view of a first substrate according to a second embodiment of the invention. As shown in fig. 19 and 20, the reflective display panel and the reflective display device according to the second embodiment of the present invention are substantially the same as those of the first embodiment (fig. 2 to 18), except that in the present embodiment:
Each pixel unit P is internally provided with a light filtering area F and a light transmitting area T. Optionally, the filter area F in each pixel unit P is disposed on one side of the pixel unit P, the light-transmitting area T is disposed on the other side of the pixel unit P, for example, each pixel unit P is disposed with a filter area F and a light-transmitting area T, the filter area F is disposed in a right half area of the pixel unit P, and the light-transmitting area T is disposed in a left half area of the pixel unit P. In which, for each pixel unit P, the light-transmitting area t=1.5:1 (the width ratio can be adjusted according to the required contrast/NTSC, etc.).
In this embodiment, a light shielding wall 115 is disposed in each pixel unit P, and the light shielding wall 115 in each pixel unit P is disposed between the light filtering area F and the light transmitting area T and is used for spacing the light filtering area F and the light transmitting area T from each other. The light-shielding wall 115 may be made of the same material and by the same manufacturing process as the black matrix 111.
Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.
Example III
Fig. 21 is a schematic structural diagram of a reflective display device in an initial state according to a third embodiment of the present invention. Fig. 22 is a schematic plan view of a first substrate according to a third embodiment of the present invention. As shown in fig. 21 and 22, the reflective display panel and the reflective display device according to the third embodiment of the present invention are substantially the same as those of the first embodiment (fig. 2 to 18), except that in the present embodiment:
The plurality of pixel units P have a first pixel unit P1, a second pixel unit P2 and a third pixel unit P3, the light-filtering area F corresponds to the first pixel unit P1 and the second pixel unit P2, and the light-transmitting area T corresponds to the third pixel unit P3, i.e. the first pixel units P1 are all the light-filtering areas F, the second pixel units P2 are all the light-filtering areas F, and the third pixel units P3 are all the light-transmitting areas T. The color resist layer 112 includes a red resist layer 112r and a green resist layer 112g, and the light-exciting layer 113 includes a red light-exciting layer 113r and a green light-exciting layer 113g. The red blocking layer 112r and the red light excitation layer 113r are stacked in the first pixel unit P1, the green blocking layer 112g and the green light excitation layer 113g are stacked in the second pixel unit P2, that is, projections of the red blocking layer 112r and the red light excitation layer 113r on the first substrate 11 overlap each other, and projections of the green blocking layer 112g and the green light excitation layer 113g on the first substrate 11 overlap each other. That is, in the present embodiment, the first pixel unit P1 is a red pixel unit and reflects red light, the second pixel unit P2 is a green pixel unit and reflects green light, and the third pixel unit P3 is a blue pixel unit and reflects blue light, so that the reflected red light, green light and blue light can be independently controlled to mix more colors of light, so as to increase the color of the display screen.
Further, a third pixel unit P3 is disposed between the adjacent first pixel unit P1 and second pixel unit P2. In this embodiment, a row of third pixel units P3, a row of first pixel units P1, a row of third pixel units P3, and a row of second pixel units P2 are periodically arranged in the row direction.
Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.
In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.
The present invention is not limited to the preferred embodiments, and the present invention is described above in any way, but is not limited to the preferred embodiments, and any person skilled in the art will appreciate that the present invention is not limited to the embodiments described above, when the technical content disclosed above can be utilized to make a little change or modification, the technical content disclosed above is equivalent to the equivalent embodiment of the equivalent change, but any simple modification, equivalent change and modification made to the above embodiment according to the technical substance of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411311893.1A CN119045249A (en) | 2024-09-19 | 2024-09-19 | Reflective display panel and reflective display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411311893.1A CN119045249A (en) | 2024-09-19 | 2024-09-19 | Reflective display panel and reflective display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119045249A true CN119045249A (en) | 2024-11-29 |
Family
ID=93574109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411311893.1A Pending CN119045249A (en) | 2024-09-19 | 2024-09-19 | Reflective display panel and reflective display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119045249A (en) |
-
2024
- 2024-09-19 CN CN202411311893.1A patent/CN119045249A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108873465B (en) | Quantum dot display substrate, manufacturing method thereof and display device | |
| KR101636052B1 (en) | Color filter and display device employing the same | |
| US9442343B2 (en) | Electronic paper display device | |
| TWI584681B (en) | Single-layer reflective display utilizing luminescence | |
| US20170255055A1 (en) | Quantum dot liquid crystal display device | |
| CN108153036A (en) | The method of the luminescence generated by light of photo luminescent devices, display panel and control light | |
| EP2056158A2 (en) | Color liquid crystal display devices assembly | |
| JP2009251129A (en) | Color filter for liquid crystal display device and liquid crystal display device | |
| CN112540474B (en) | Display device with switchable wide and narrow viewing angles | |
| WO2012087269A1 (en) | Reflective display utilizing luminescence | |
| CN107942573B (en) | Liquid crystal display device with a light guide plate | |
| CN109507824A (en) | Display device | |
| US20100091218A1 (en) | Color display | |
| TWI280439B (en) | Liquid crystal display device | |
| CN110426890B (en) | Liquid crystal display panel and liquid crystal display device | |
| CN119045249A (en) | Reflective display panel and reflective display device | |
| US9416944B2 (en) | Reflective color display with luminescence and backlighting | |
| CN116203769A (en) | Reflective display screen | |
| WO2006104159A1 (en) | Display unit | |
| JP2005283673A (en) | Liquid crystal display device | |
| CN222784747U (en) | Liquid crystal display device | |
| CN103969860A (en) | Interferometric modulation type display device | |
| TWI424229B (en) | Display with backlight | |
| CN216485882U (en) | Display panel and display device | |
| WO2016163196A1 (en) | Liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |