CN113589574A - Full-color car window display system - Google Patents

Full-color car window display system Download PDF

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Publication number
CN113589574A
CN113589574A CN202110772647.6A CN202110772647A CN113589574A CN 113589574 A CN113589574 A CN 113589574A CN 202110772647 A CN202110772647 A CN 202110772647A CN 113589574 A CN113589574 A CN 113589574A
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display
sub
liquid crystal
color
full
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陈恩果
任鑫鑫
张永爱
郭太良
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Fuzhou University
Mindu Innovation Laboratory
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Fuzhou University
Mindu Innovation Laboratory
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Priority to CN202110772647.6A priority Critical patent/CN113589574A/en
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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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Liquid Crystal (AREA)
  • Geometry (AREA)
  • Multimedia (AREA)
  • Dispersion Chemistry (AREA)

Abstract

The invention relates to a full-color car window display system which comprises three sub-display layers with laminated structures, wherein the three sub-display layers respectively display three primary color patterns. Each stack comprises: the LED display panel comprises a first parallel substrate, a second parallel substrate, a pixilated polymer dispersed liquid crystal layer, an LED lamp strip, a lamp strip reflecting cover and a TFT electrode, wherein the pixilated polymer dispersed liquid crystal layer is clamped by the first parallel substrate and the second parallel substrate, the LED lamp strip is positioned at the edge of the first parallel substrate or the second parallel substrate, and the TFT electrode is connected with the liquid crystal layer. The three sub-display layers are sequentially overlapped up and down, pixels of each layer are aligned to form a full-color display car window, each pixel is independently controlled through the TFT electrode to display a color picture, a passenger can obtain information such as required car conditions and the like only by watching the information on the car window, and the safety can be improved while the appearance is improved; when the side LED lamp strip is selectively lightened and the electrode is powered on, the side LED lamp strip is in a transparent state or a full-color state; the side LED lamp strip is not lighted and is in a semitransparent scattering state when the electrode is not powered, so that ambient light such as external sunlight can be blocked, and the interior of a vehicle can be prevented from being peeped.

Description

Full-color car window display system
Technical Field
The invention relates to the field of full-color display of vehicle windows, in particular to a full-color vehicle window display system.
Background
Along with the continuous progress of car and display technology, people have proposed higher and higher requirement to car window glass, traditional door window is as passenger or driver's main channel that acquires outer information of car, only possess the printing opacity function, can't realize shading and full-color demonstration function, provide more information for the passenger, also can't realize the people car interdynamic based on the door window, and along with the passenger to the continuous promotion of security and additional information demand, the current door window has gradually integrated full-color demonstration's function on traditional glass's basis, but transparent display screen only shows in the car, the function singleness, can't realize the problem of shading simultaneously.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a full-color window display system to solve the problem that the window cannot be shielded and displayed in full-color.
The invention is realized by adopting the following scheme: a full-color car window display system comprises three sub-display layers with laminated structures, namely a first sub-display layer, a second sub-display layer and a third sub-display layer, which respectively display red, green and blue patterns with three primary colors; each sub-display layer comprises a first parallel substrate, a second parallel substrate, a pixilated polymer dispersed liquid crystal layer, an LED lamp strip, a lamp strip reflecting cover and a TFT electrode, wherein the pixilated polymer dispersed liquid crystal layer is clamped by the first parallel substrate and the second parallel substrate, the LED lamp strip is positioned at the edge of the first parallel substrate or the second parallel substrate, and the TFT electrode is connected with the liquid crystal layer.
Furthermore, the substrates of the three sub-display layers are parallel to each other, the pixilated polymer dispersed liquid crystal layer is aligned up and down, the first parallel substrate and the second parallel substrate of each sub-display layer can be provided with a certain radian, and the radian range is less than 5 mm; polishing the edges of the sub-display layers, wherein one of the three primary color red, green and blue LED lamp strips is attached to any one side edge of each sub-display layer, and the other side edges are plated with reflecting materials or absorbing materials or are adhered with reflecting strips or light absorbing strips; any sub-display layer only displays a picture with one color of the three primary colors, and the color of the sub-display layer is determined by the color of the LED light bar; the first sub-display layer, the second sub-display layer and the third sub-display layer are sequentially superposed up and down, pixels of all layers are aligned to form a full-color display vehicle window, the pixilated dispersed liquid crystal layer is controlled by controlling the TFT electrode, so that each pixel is independently controlled to display a color picture, and the side LED lamp strip is selectively lightened and is in a transparent state or a full-color state when the electrode is powered; the side LED light bar is not lighted and is in a semitransparent scattering state when the electrodes are not powered.
Further, each of the sub-display layers includes a first parallel substrate and a second parallel substrate, which are transparent electrode glass-coated plates, including but not limited to Indium Tin Oxide (ITO) glass-coated plates.
Further, a single sub-display layer contains a plurality of polymer dispersed liquid crystal pixels, and the thickness of the single sub-display layer is 200-500 mu m; the sub-display layer is divided into a pixel array by a light absorption black matrix, and each pixel can be independently controlled; when the sub-pixels are displayed on the vehicle window, due to the scattering property of the polymer dispersed liquid crystal, double-sided light emitting is carried out, namely, display images can be seen inside and outside the vehicle; the display resolution of the car window is determined by the number of pixels, the TFT electrodes are matched with the pixels one by one, each pixel is independently controlled by the TFT electrodes, and the length and the width of the structure size of each sub-pixel are 20-250 mu m;
pixel (px) = inch (in) x resolution (ppi).
Furthermore, the interlayer of the first and second parallel substrates of each sub-display layer contains a polymer dispersed liquid crystal layer which is composed of micron or submicron nematic liquid crystal droplets dispersed in a polymer matrix; liquid crystals include, but are not limited to, ZLI 1840, ZLI 1957/5, ZLI 2452, ZLI 3096, ZLI 3281, ZLI 3201-.
Further, the polymers include, but are not limited to, polyvinyl alcohol (PVA) polymers, hydroxypropyl cellulose (HPC) polymers, polymethyl methacrylate (PMMA) polymers, Polyoxymethylene (POM) polymers, Polyacrylonitrile (PAN) polymers, polycarbonate bisphenol a (pc) polymers; the liquid crystal accounts for no more than 50%.
Further, the LED light bars at the edges of the parallel substrates are side-entry light sources, the size of the light emitting area of the light source should be smaller than the thickness of the side of the polymer dispersed liquid crystal layer, wherein the central wavelength ranges of red, green and blue: the red light is 610-630 nm, the green light is 520-550 nm, and the blue light is 430-470 nm; the reflector can be selected from the group consisting of, but not limited to, SiO2A film of/Al, said SiO2The reflectivity of the/Al thin film is more than 90 percent.
Furthermore, the number of the sub-display layers can be expanded to more than three layers according to the display color requirement, all the sub-display layers are overlapped in parallel to form a full-color liquid crystal display, and barrier layers can be added among all the layers to reduce the crosstalk among all the layers.
Preferably, the invention also provides a working method of the full-color car window display system, when the car is not started, the side LED lamp strip is not lighted, the TFT electrode of the sub-display layer is not electrified, the optical axis of the small droplet formed by the liquid crystal molecules is in free orientation, the refractive index of the small droplet is not matched with the refractive index of the pixelized polymer dispersed liquid crystal layer, when the external light passes through the car window, the small droplet is strongly scattered to be in an opaque milky white shape or a semitransparent shape, and the external environment light is blocked to comprise sunlight so as to prevent the inside of the car from being peeped; when the vehicle is started, the three-primary-color LEDs on the side are selectively lightened, the TFT electrodes are electrified, the optical axis orientations of liquid crystal droplets at the corresponding positions of the electrodes are adjusted, if the refractive indexes of the pixelated polymer dispersed liquid crystal layer and the oriented liquid crystal are matched, a non-scattering state is obtained, light entering the parallel substrate is subjected to total reflection and cannot be guided out, the corresponding positions of the TFT are in a transparent state, and if the refractive indexes of the pixelated polymer dispersed liquid crystal layer and the liquid crystal are not matched, the light entering the parallel substrate is scattered by the pixels and is emitted from the corresponding positions of the TFT.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the three sub-display layers are sequentially overlapped up and down, pixels of each layer are aligned to form a full-color display car window, each pixel is independently controlled by controlling the transparent electrode and the signal source to display a color picture, a passenger can obtain information such as required car conditions only by watching the information on the car window, and the safety can be improved while the appearance is improved; the transparent state is realized when no display signal is input and the electrodes are powered; the display device has the advantages that no display signal is input, and the electrode is in a semitransparent scattering state when not powered, so that external sunlight and other ambient light can be blocked, and the peep in a vehicle can be prevented.
Drawings
Fig. 1 is a typical architecture diagram of a full-color car window display system according to an embodiment of the present invention, wherein 1 is a first parallel substrate including transparent electrodes; 2 is a second parallel substrate containing transparent electrodes; 3 is a polymer dispersed liquid crystal layer; 4 is TFT 4; 5 is a light-absorbing black matrix; 6 is a red light bar; 7 is a green light bar; 8 is a blue light bar; reference numeral 9 denotes a reflection cover 9.
Fig. 2 is a schematic view of a full-color vehicle window display system according to an embodiment of the present invention when the side LED is not turned on and the power is not supplied to the electrode, where 10 is natural light.
Fig. 3 is a schematic view of a side LED light bar of a full-color vehicle window display system according to an embodiment of the invention being selectively lit and displaying transparency when electrodes are powered, where 11 is red light, 12 is green light, and 13 is blue light.
Fig. 4 is a schematic diagram of a side LED light bar of the full-color vehicle window display system according to the embodiment of the invention being selectively lit and displaying a green image when the electrodes are powered.
Fig. 5 is a schematic diagram of a side LED light bar of the full-color vehicle window display system according to the embodiment of the invention being selectively lit and displaying full color when the electrodes are powered.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
As shown in fig. 1, the present embodiment provides a full-color vehicle window display system, which includes three sub-display layers of a stacked structure, namely, a first sub-display layer, a second sub-display layer, and a third sub-display layer, for respectively displaying three primary color red, green, and blue patterns; each sub-display layer comprises a first parallel substrate 1, a second parallel substrate 2, a pixilated polymer dispersed liquid crystal layer 3 sandwiched by the first and second parallel substrates 2, an LED lamp strip positioned at the edge of the first or second parallel substrate 2, a lamp strip reflector 9 and a TFT electrode connected with the liquid crystal layer.
Any sub-display layer of the vehicle window only displays a picture with one color of three primary colors, and the color of the sub-display layer is determined by the color of the LED lamp strip.
In the embodiment, the substrates of the three sub-display layers are parallel to each other, the pixelized polymer dispersed liquid crystal layer 3 is aligned up and down, the first parallel substrate 1 and the second parallel substrate 2 of each sub-display layer can be set with a certain radian, and the radian range is less than 5 mm; the display area of the vehicle window is limited by the size of the substrate, and the display area is far larger than the thickness of the substrate; the display system can be placed at any position of the car window, but in order to realize the shading effect, the whole full-color system covers the whole car window, and the whole car window can be displayed in full color;
polishing the edges of the sub-display layers, wherein one of the three primary color red, green and blue LED lamp strips is attached to any one side edge of each sub-display layer, and the other side edges are plated with reflecting materials or absorbing materials or are adhered with reflecting strips or light absorbing strips; any sub-display layer only displays a picture with one color of the three primary colors, and the color of the sub-display layer is determined by the color of the LED light bar; the first sub-display layer, the second sub-display layer and the third sub-display layer are sequentially superposed up and down, pixels of each layer are aligned to form a full-color display vehicle window, the pixilated dispersed liquid crystal layer is controlled by controlling the TFT electrode, so that each pixel is independently controlled to display a color picture, namely, the TFT electrode is controlled, the optical axis of small droplets formed by liquid crystal molecules is oriented, and the refractive index of the small droplets and the refractive index of the polymer matrix are adjusted; when the side LED lamp strip is selectively lightened and the electrode is powered on, the side LED lamp strip is in a transparent state or a full-color state; the side LED light bar is not lighted and is in a semitransparent scattering state when the electrodes are not powered.
In the present embodiment, each of the sub-display layers includes a first parallel substrate 1 and a second parallel substrate 2, which are transparent electrode glass-coated plates, including but not limited to Indium Tin Oxide (ITO) glass-coated plates. The preparation method is to prepare the transparent electrode glass coating by DC magnetron sputtering, DC + RF magnetron sputtering or HDAP method, and a silicon dioxide barrier layer is plated by Chemical Vapor Deposition (CVD) before the transparent electrode glass coating is plated. Preparing corresponding Thin Film Transistor (TFT) electrodes on the transparent electrode glass coating according to liquid crystal pixels, forming a TFT substrate through photoetching, and preparing a black matrix on the TFT substrate to prevent light leakage or color mixing; secondly, preparing a mixed solution of liquid crystal and polymer, and uniformly sucking the solution between parallel substrates before the solution is solidified; and finally, heating and curing the compounded film. And then, aligning and marking the laminated glass to align the three laminated layers in each sub-display layer mutually, thereby finishing the manufacture of one sub-display layer.
In the embodiment, a single sub-display layer contains a plurality of polymer dispersed liquid crystal pixels, and the thickness of the single sub-display layer is 200-500 mu m; the sub-display layer is divided into a pixel array by a light absorption black matrix 5, and each pixel can be independently controlled; when the sub-pixels are displayed on the vehicle window, due to the scattering property of the polymer dispersed liquid crystal, double-sided light emitting is carried out, namely, display images can be seen inside and outside the vehicle; the display resolution of the car window is determined by the number of pixels, the TFT electrodes are matched with the pixels one by one, each pixel is independently controlled by the TFT electrodes, and the length and the width of the structure size of each sub-pixel are 20-250 mu m.
Pixel (px) = inch (in) x resolution (ppi)
1 inch =2.54 cm (ca)
If the resolution is 1080P, the number of pixels is 1920 × 1080= 2073600;
in this embodiment, the first and second parallel substrates 2 of each sub-display layer contain a polymer dispersed liquid crystal layer 3 in between, which is composed of micron or submicron sized nematic liquid crystal droplets dispersed in a polymer matrix; liquid crystals include, but are not limited to, ZLI 1840, ZLI 1957/5, ZLI 2452, ZLI 3096, ZLI 3281, ZLI 3201-.
In this embodiment, the polymers include, but are not limited to, polyvinyl alcohol (PVA) polymers, hydroxypropyl cellulose (HPC) polymers, polymethyl methacrylate (PMMA) polymers, Polyoxymethylene (POM) polymers, Polyacrylonitrile (PAN) polymers, polycarbonate bisphenol a (pc) polymers; the liquid crystal accounts for no more than 50%.
In this embodiment, the LED and the reflector 9 form a light source module, the LED light bar at the edge of the parallel substrate is a lateral light source, the size of the light emitting area of the light source should be smaller than the thickness of the side of the polymer dispersed liquid crystal layer 3, wherein the central wavelength range of red, green and blue: the red light is 610-630 nm, the green light is 520-550 nm, and the blue light is 430-470 nm; the reflector 9 can be selected from the group consisting of, but not limited to, SiO2A film of/Al, said SiO2The reflectivity of the/Al thin film is more than 90 percent.
In this embodiment, the number of the sub-display layers can be extended to more than three layers according to the display color requirement, all the sub-display layers are stacked in parallel to form a full-color liquid crystal display, and a barrier layer can be added between all the layers to reduce the crosstalk between all the layers.
Preferably, the embodiment further provides a working method of the full-color car window display system, which specifically includes: when the vehicle is not started, the side LED lamp strip is not lightened, the TFT electrode 4 of the sub-display layer is not electrified, the optical axis of a small droplet formed by liquid crystal molecules is in free orientation, the refractive index of the small droplet is not matched with that of the pixelized polymer dispersed liquid crystal layer 3, when external light passes through a vehicle window, the small droplet is strongly scattered by the small droplet to be in an opaque milky white or semitransparent state, and external environment light including sunlight is blocked to prevent the interior of the vehicle from being peeped; when the vehicle is started, the side tricolor LEDs are selectively lightened, the TFT electrodes are electrified, the optical axis orientation of liquid crystal droplets at corresponding positions of the electrodes is adjusted, if the refractive indexes of the pixelized polymer dispersed liquid crystal layer 3 and the oriented liquid crystal are matched, a non-scattering state is obtained, light entering the parallel substrate is subjected to total reflection and cannot be guided out, the corresponding positions of the TFTs are in a transparent state, and if the refractive indexes of the pixelized polymer dispersed liquid crystal layer 3 and the liquid crystal are not matched, the light entering the parallel substrate is scattered by the pixels and is emitted from the corresponding positions of the TFTs 4.
Preferably, the full-color vehicle window display system of the present embodiment includes: three sub-display layers of a stacked structure respectively display three primary color (usually red, green and blue) patterns. Each stack comprises: the liquid crystal display device comprises a first parallel substrate 2, a second parallel substrate 2, a pixilated polymer dispersed liquid crystal layer 3 sandwiched by the first parallel substrate 2 and the second parallel substrate 2, an LED lamp strip positioned at the edge of the first parallel substrate or the second parallel substrate 2, a lamp strip reflecting cover 9 and a transparent conductive electrode connected with the liquid crystal layer, and can be seen from figure 1. Fig. 1 is a typical architecture of a full-color vehicle window display system, which is composed of three basic layers, i.e., red, green and blue sub-display layers.
Referring to fig. 1, the substrates of the sub-display layers are parallel to each other and the pixelized polymer dispersed liquid crystal layer 3 is aligned up and down, and the substrates of the sub-display layers can be set to have a certain radian, wherein the radian range is less than 5 mm. The window display area is limited by the substrate size, the display area being much larger than the substrate thickness. The edges of the sub-display layers are polished, one side edge of each sub-display layer is attached to one of the three-primary-color LED light bars, and the other side edges can be plated with reflecting materials or absorbing materials or can be pasted with reflecting strips or light absorbing strips. Any sub-display layer only displays a picture with one of the three primary colors, and the color of the sub-display layer is determined by the color of the LED light bar. The three sub-display layers are sequentially overlapped up and down, pixels of each layer are aligned to form a full-color display vehicle window, each pixel is independently controlled by controlling the transparent electrode and the signal source to display a color picture, the display state is a transparent state when no display signal is input and the electrodes are powered on, and the display state is a semitransparent scattering state when no display signal is input and the electrodes are not powered on.
As shown in FIG. 1, the sub-display layer is characterized in that a single polymer dispersed liquid crystal sub-display layer contains a plurality of polymer dispersed liquid crystal pixels, and the thickness is 200-500 [ mu ] m. The sub-display layer is divided into an array of pixels by a light-absorbing black matrix 5, each pixel being independently controllable. The display resolution of the car window is determined by the number of pixels, the TFT electrodes are matched with the pixels one by one, each pixel can be independently controlled by the TFT electrodes, and the length and the width of the sub-pixel structure are 20-250 mu m. The other characteristic is that each sub-pixel can emit light from both sides due to the scattering property of the polymer dispersed liquid crystal when displaying on a vehicle window, namely, display images can be seen inside and outside the vehicle.
As shown in fig. 1, the parallel substrates are transparent electrode glass coated plates, including but not limited to Indium Tin Oxide (ITO) glass coated plates, the ITO layer is prepared by DC magnetron sputtering, DC + RF magnetron sputtering or HDAP method, and before the ITO layer is plated, a silicon dioxide barrier layer is plated by Chemical Vapor Deposition (CVD). Preparing a corresponding Thin Film Transistor (TFT) electrode 4 on the ITO glass coating according to the liquid crystal pixel, forming a TFT substrate through photoetching, and preparing a black matrix on the TFT substrate to prevent light leakage or color mixing; secondly, preparing a mixed solution of liquid crystal and polymer, and uniformly sucking the solution between parallel substrates before the solution is solidified; and finally, heating and curing the compounded film. And then, aligning and marking the laminated glass to align the three laminated layers in each sub-display layer mutually, thereby finishing the manufacture of one sub-display layer.
As shown in fig. 1, the polymer dispersed liquid crystal layer 3 is characterized in that the polymer dispersed liquid crystal layer 3 is contained in the interlayer of the first and second parallel substrates 2 of each sub-display layer, and is composed of nematic liquid crystal droplets with micron or submicron size dispersed in a polymer matrix. Liquid crystals include, but are not limited to, ZLI 1840, ZLI 1957/5, ZLI 2452, ZLI 3096, ZLI 3281, ZLI 3201-. Polymers include, but are not limited to, polyvinyl alcohol (PVA) polymers, hydroxypropyl cellulose (HPC) polymers, polymethyl methacrylate (PMMA) polymers, Polyoxymethylene (POM) polymers, Polyacrylonitrile (PAN) polymers, polycarbonate bisphenol a (pc) polymers, and the like. The liquid crystal accounts for no more than 50%.
As shown in fig. 1, the light source module includes an LED and a reflective cover 9. The LED lamp strip positioned at the edge of the parallel substrate is a lateral light source, the size of a light emitting area of the light source is smaller than the thickness of the side edge of the polymer dispersed liquid crystal layer 3, wherein the central wavelength range of red, green and blue is as follows: the red light is 610-630 nm, the green light is 520-550 nm, and the blue light is 430-470 nm. The reflector 9 can be made of SiO, but not limited thereto2The reflectivity of the/Al film is more than 90 percent.
In an embodiment of the present application, as shown in fig. 2, when the automobile is not started, the full-color window TFT electrodes are not powered on, and the side LED light bars are not lit, at this time, external natural light enters the window to be scattered, the window is in a translucent state, and the external world cannot see objects inside the automobile clearly; as shown in the figure, when the vehicle is not started, the three-primary-color lamp strips on the side edges are not lighted, the TFT electrodes are not electrified, the optical axes of the small droplets formed by the liquid crystal molecules are in free orientation, the refractive index of the small droplets is not matched with that of the polymer matrix, when external light passes through the matrix, the small droplets are strongly scattered to be in an opaque milky white or semitransparent state, the external light such as sunlight is blocked, and the vehicle is prevented from being peeped.
As shown in fig. 3, after the automobile is started, the tricolor light bars on the side of the full-color automobile window are selectively lighted, the TFT electrodes are powered on, if the refractive indexes of the polymers of the three sub-display layers and the oriented liquid crystal are all matched, the tricolor light is fully emitted, the automobile window is in a transparent state, and the inside and the outside of the automobile can be viewed normally. As shown in the figure, after the vehicle is started, the three-primary-color lamp strips on the side are lightened, the TFT electrodes 4 are electrified, the optical axis orientation of the liquid crystal microdroplets of the three sub-display layers is adjusted by controlling the TFT electrodes, the refractive indexes of the polymer and the oriented liquid crystal are matched to obtain a non-scattering state, the three primary colors are subjected to full emission, and the vehicle window is in a transparent state. The light emitted by the tricolor light bars propagates in the sub-display layer by total reflection and is finally dissipated and disappears in the layer.
As shown in fig. 4, when the car is started, the full-color car window is started, the three primary color light bars on the side are lighted, the TFT electrodes 4 are powered on, and at this time, when the TFT electrodes 4 in the red and blue sub-display layers control the orientation of the liquid crystal, so that the refractive index of the liquid crystal is consistent with that of the polymer, the red and blue sub-display layers are in a transparent state; when any TFT electrode in the green sub-display layer adjusts the liquid crystal orientation to make the refractive index of the liquid crystal inconsistent with that of the polymer, the pixel position is in a scattering state, and the vehicle window displays a green monochromatic image. As shown in the figure, when the vehicle is started, the three-primary-color lamp strips on the side edges are lightened, the TFT electrodes 4 are electrified, at the moment, the TFT electrodes in the red and blue sub-display layers control the orientation of liquid crystals, and when the refractive index of the liquid crystals is consistent with that of the polymer, the red and blue sub-display layers are in a transparent state; when any TFT electrode 4 in the green sub-display layer adjusts the liquid crystal orientation so that the refractive index of the liquid crystal is not the same as the refractive index of the polymer, the pixel position is in a scattering state, and the vehicle window will display a green monochromatic image. Specifically, the display light color includes, but is not limited to, green.
As shown in fig. 5, when the car is started and the full-color window is started, the side tricolor light bars are turned on, the TFT4 electrodes are energized, and at this time, any TFT electrode in the three sub-display layers adjusts the orientation of the liquid crystal so that the refractive index of the liquid crystal is not the same as the refractive index of the polymer, the corresponding pixel position is in a scattering state, and the window will display a full-color image. As shown in the figure, when the vehicle is started, the three-primary-color lamp bars on the side are lighted, the TFT electrodes 4 are powered on, the optical axis orientation of the liquid crystal droplets is adjusted, the optical axes of the pixilated liquid crystal droplets at the corresponding positions are reoriented, so that the refractive indexes of the polymer and the liquid crystal are no longer matched, and the incident light is scattered and emitted from the corresponding positions of the image signal source.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims (9)

1. A full-color car window display system is characterized in that: the display device comprises three sub-display layers with laminated structures, namely a first sub-display layer, a second sub-display layer and a third sub-display layer, wherein the three sub-display layers respectively display red, green and blue patterns of three primary colors; each sub-display layer comprises a first parallel substrate, a second parallel substrate, a pixilated polymer dispersed liquid crystal layer, an LED lamp strip, a lamp strip reflecting cover and a TFT electrode, wherein the pixilated polymer dispersed liquid crystal layer is clamped by the first parallel substrate and the second parallel substrate, the LED lamp strip is positioned at the edge of the first parallel substrate or the second parallel substrate, and the TFT electrode is connected with the liquid crystal layer.
2. The full-color vehicle window display system according to claim 1, wherein:
the substrates of the three sub-display layers are parallel to each other, the pixilated polymer dispersed liquid crystal layers are aligned up and down, the first parallel substrate and the second parallel substrate of each sub-display layer can be provided with a certain radian, and the radian range is less than 5 mm; polishing the edges of the sub-display layers, wherein one of the three primary color red, green and blue LED lamp strips is attached to any one side edge of each sub-display layer, and the other side edges are plated with reflecting materials or absorbing materials or are adhered with reflecting strips or light absorbing strips; any sub-display layer only displays a picture with one color of the three primary colors, and the color of the sub-display layer is determined by the color of the LED light bar; the first sub-display layer, the second sub-display layer and the third sub-display layer are sequentially superposed up and down, pixels of all layers are aligned to form a full-color display vehicle window, the pixilated dispersed liquid crystal layer is controlled by controlling the TFT electrode, so that each pixel is independently controlled to display a color picture, and the side LED lamp strip is selectively lightened and is in a transparent state or a full-color state when the electrode is powered; the side LED light bar is not lighted and is in a semitransparent scattering state when the electrodes are not powered.
3. The full-color vehicle window display system according to claim 1, wherein: each of the sub-display layers includes a first parallel substrate and a second parallel substrate, which are transparent electrode glass-coated plates, including but not limited to indium tin oxide glass-coated plates.
4. The full-color vehicle window display system according to claim 1, wherein: the single sub-display layer contains a plurality of polymer dispersed liquid crystal pixels, and the thickness of the single sub-display layer is 200-500 mu m; the sub-display layer is divided into a pixel array by a light absorption black matrix, and each pixel can be independently controlled; when the sub-pixels are displayed on the vehicle window, due to the scattering property of the polymer dispersed liquid crystal, double-sided light emitting is carried out, namely, display images can be seen inside and outside the vehicle; the display resolution of the car window is determined by the number of pixels, the TFT electrodes are matched with the pixels one by one, each pixel is independently controlled by the TFT electrodes, and the length and the width of the structure size of each sub-pixel are 20-250 mu m;
pixel (px) = inch (in) x resolution (ppi).
5. The full-color vehicle window display system according to claim 1, wherein: the first and second parallel substrate interlayers of each sub-display layer contain a polymer dispersed liquid crystal layer which is formed by dispersing nematic liquid crystal droplets with micron or submicron sizes in a polymer matrix; liquid crystals include, but are not limited to, ZLI 1840, ZLI 1957/5, ZLI 2452, ZLI 3096, ZLI 3281, ZLI 3201-.
6. The full-color vehicle window display system according to claim 6, wherein: such polymers include, but are not limited to, polyvinyl alcohol polymers, hydroxypropyl cellulose polymers, polymethyl methacrylate polymers, polyoxymethylene polymers, polyacrylonitrile polymers, polycarbonate bisphenol a polymers; the liquid crystal accounts for no more than 50%.
7. The full-color vehicle window display system according to claim 1, wherein: the LED lamp strip positioned at the edge of the parallel substrate is a lateral light source, the size of a light emitting area of the light source is smaller than the thickness of the lateral side of the polymer dispersed liquid crystal layer, wherein the central wavelength range of red, green and blue is as follows: the red light is 610-630 nm, the green light is 520-550 nm, and the blue light is 430-470 nm; the reflector can be selected from the group consisting of, but not limited to, SiO2A film of/Al, said SiO2The reflectivity of the/Al thin film is more than 90 percent.
8. The full-color vehicle window display system according to claim 1, wherein: the number of the sub-display layers can be expanded to more than three layers according to the display color requirement, all the sub-display layers are overlapped in parallel to form a full-color liquid crystal display, and a barrier layer can be added between all the layers to reduce the crosstalk between all the layers.
9. An operating method of a full-color vehicle window display system according to any one of claims 1 to 8, characterized in that: when the vehicle is not started, the side LED lamp strips are not lightened, the TFT electrodes of the sub display layers are not electrified, the optical axes of the small droplets formed by the liquid crystal molecules are in free orientation, the refractive index of the small droplets is not matched with that of the pixelized polymer dispersed liquid crystal layer, when external light passes through a vehicle window, the small droplets are strongly scattered to be in an opaque milky white or semitransparent state, and external ambient light including sunlight is blocked to prevent the interior of the vehicle from being peeped; when the vehicle is started, the three-primary-color LEDs on the side are selectively lightened, the TFT electrodes are electrified, the optical axis orientations of liquid crystal droplets at the corresponding positions of the electrodes are adjusted, if the refractive indexes of the pixelated polymer dispersed liquid crystal layer and the oriented liquid crystal are matched, a non-scattering state is obtained, light entering the parallel substrate is subjected to total reflection and cannot be guided out, the corresponding positions of the TFT are in a transparent state, and if the refractive indexes of the pixelated polymer dispersed liquid crystal layer and the liquid crystal are not matched, the light entering the parallel substrate is scattered by the pixels and is emitted from the corresponding positions of the TFT.
CN202110772647.6A 2021-07-08 2021-07-08 Full-color car window display system Pending CN113589574A (en)

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CN1282066A (en) * 1999-07-27 2001-01-31 美能达株式会社 Liquid crystal display element and its manufacturing method
JP2005062718A (en) * 2003-08-20 2005-03-10 Tadahiro Asada Color liquid crystal display
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Application publication date: 20211102