CN108681156B - Electronic license plate liquid crystal display with different background colors - Google Patents
Electronic license plate liquid crystal display with different background colors Download PDFInfo
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- CN108681156B CN108681156B CN201810399635.1A CN201810399635A CN108681156B CN 108681156 B CN108681156 B CN 108681156B CN 201810399635 A CN201810399635 A CN 201810399635A CN 108681156 B CN108681156 B CN 108681156B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 57
- 239000003086 colorant Substances 0.000 title claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 74
- 239000011521 glass Substances 0.000 claims abstract description 69
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 claims abstract description 16
- 238000009792 diffusion process Methods 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 7
- 230000002708 enhancing effect Effects 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 claims description 2
- 239000004988 Nematic liquid crystal Substances 0.000 abstract description 12
- 239000000463 material Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012550 audit Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to an electronic license plate liquid crystal display with different background colors, which comprises two glass substrates, two transparent electrodes, a sealing frame, a vertical alignment orientation layer, a parallel alignment orientation layer, liquid crystal and two polaroids, wherein the first glass substrate and the second glass substrate are arranged at intervals up and down, the first transparent electrode and the second transparent electrode are oppositely arranged between the first glass substrate and the second glass substrate, the sealing frame is arranged around the first transparent electrode and the second transparent electrode, a closed cavity is arranged between the first transparent electrode and the second transparent electrode, the vertical alignment orientation layer is arranged on the first transparent electrode and takes the shape of a zigzag or a wave, the parallel alignment orientation layer is arranged on the second transparent electrode, the liquid crystal is filled in the closed cavity, the first polaroid is arranged on the outer side surface of the first glass substrate and takes the shape of a single color or multiple colors, the transmission axis angle is 0 DEG, the second polaroid is arranged on the outer side surface of the second glass substrate and takes the shape of a reflecting sheet with the transmission axis angle of 0 DEG, and the polarization angles of the two polaroids are the same. The product of the invention can display different background colors on a bistable nematic liquid crystal display.
Description
Technical Field
The invention relates to the technical field of liquid crystal displays, in particular to an electronic license plate liquid crystal display with different background colors.
Background
At present, the traditional license plates of the automobiles at home and abroad still occupy the market predominance of the automobiles and new automobiles in a certain period in the future, but with the development of social life, everything interconnection and intellectualization are the necessary development trend of all vehicles including the automobiles. Besides all functions of a single RFID scheme, the electronic license plate has the license plate number display function of the traditional license plate, and maintains the maximum compatibility for the traditional automobile license plate identification method, such as road surface on-duty traffic police, passers-by, traffic monitoring cameras and the like. In addition, the functions which the traditional license plate does not have can be added, such as real-time display of automobile stolen information, annual audit, insurance expiration information and the like on the license plate. In addition, the LTE network of the license plate can enable the daily management functions of vehicles such as application registration, annual examination and the like of license plate numbers to be completed in a wireless mode, and social operation cost of vehicle management can be remarkably saved. The electronic license plate will be greatly developed and gradually replace the traditional license plate in the future.
The traditional license plate is the most common license plate with white background and black characters, and also has various personalized license plates with blue background and white characters, green background and white characters and the like. If the electronic license plate is fully popularized and replaces the traditional license plate of the automobile, different background colors must be displayed on a display as the traditional license plate. The electronic license plates of the prior art do not meet this requirement.
Disclosure of Invention
The technical problem to be solved by the invention is how to realize the display of different background colors on a bistable nematic liquid crystal display.
The technical scheme for solving the technical problems is as follows:
The utility model provides an electronic license plate liquid crystal display of different background colors, includes first glass substrate, second glass substrate, first transparent electrode, second transparent electrode, seal gum frame, vertical alignment directional layer, parallel alignment directional layer, liquid crystal, first polaroid and second polaroid, first glass substrate with the second glass substrate is the interval arrangement from top to bottom, just first transparent electrode locates first glass substrate orientation one side of second glass substrate, the second transparent electrode locates second glass substrate orientation one side of first glass substrate, seal gum frame is the annular setting, and locates around between first transparent electrode and the second transparent electrode, seal gum frame first transparent electrode with form airtight chamber between the second transparent electrode, vertical alignment directional layer locates on the first transparent electrode, and face in airtight chamber is zigzag or grating form, parallel alignment directional layer locates on the second transparent electrode face one side of second glass substrate orientation one side, and be the same as the first polaroid, the first polaroid is the first polarization rate is the first polaroid, the first polarization rate is the same, the first polaroid is the first polarization rate is the first polarizer is the first polarization rate, the first polarization rate is the same, the first polarization rate is the 5%, the first polaroid is the one side of the glass substrate is perpendicular to the same, the first polarization rate is the glass substrate, the first polarization rate is the one side is parallel to the glass substrate, and the first polarization rate is the glass.
Compared with the prior art, the invention has the beneficial effects that: the vertical alignment orientation layer is arranged on the surface of the first transparent electrode of the first glass substrate, is made into a zigzag or wave-shaped grating shape, and is positioned into two stable states of low pretilt angle and high pretilt angle through the zigzag or wave-shaped grating, so that liquid crystal molecules can obtain two stable arrangement states of vertical and parallel when no power is applied. The response time of the liquid crystal is mainly affected by the surface treatment of the substrate, and after the substrate is properly treated, the director of the nematic liquid crystal is aligned in a preferred direction, which is called a pretilt angle. By having the pretilt angle of the parallel alignment layer smaller than 3 °, the liquid crystal molecules can be aligned parallel to the glass substrate in the rubbing direction when not energized and aligned perpendicular to the second glass substrate when energized. The vertical alignment layer of the grating shape on the surface of the first transparent electrode of the first glass substrate is matched with the horizontal parallel alignment layer arranged on the surface of the second transparent electrode of the second glass substrate, so that the liquid crystal obtains two stable alignment structures of torsion and vertical, a bistable nematic liquid crystal alignment structure is formed, stable and accurate display can be supported under the condition of power failure of bistable nematic liquid crystal alignment, black and white display, high contrast ratio and wide visual angle of the traditional license plate can be realized, the visibility under sunlight is good, power is basically not used when display information is maintained, and power consumption is only needed when display content is refreshed. In addition, the product of the invention realizes that the electronic license plate liquid crystal display displays a background color with high contrast under a reflection mode through the structural arrangement of the first polaroid and the second polaroid. The bistable liquid crystal display with various personalized background colors can be manufactured by adopting the first polaroids with different colors or the first polaroids with different combined colors and matching with the second polaroids so as to meet the personalized requirements of the intelligent electronic license plate display screen. When natural light passes through the polarizer, the absorption axis of the polarizer means that light rays in the polarizer at the position parallel to the axis can be absorbed, the transmission axis of the polarizer means that light rays with the vibration direction parallel to the axis of the polarizer can be transmitted, and only polarized light rays with the vibration direction parallel to the transmission axis of the polarizer remain. The absorption axis and the transmission axis are perpendicular to each other. The polarization angle refers to the angle between the direction allowing light to pass through and the horizontal axis, i.e. the angle between the transmission axis of the polarizer and the horizontal axis of the product.
Based on the technical scheme, the invention can also be improved as follows:
Further, the first polarizer is a dye-based blue polarizer, a dye-based green polarizer or a partial dye-based blue polarizer.
The beneficial effects of adopting the further scheme are as follows: when the first polaroid is a dye blue polaroid, the blue bottom white display screen with high contrast in the reflection mode can be manufactured by matching with the second polaroid and optimizing the thickness of the box and the design of the liquid crystal material; when the first polaroid is a dye-based green polaroid, the second polaroid is matched, and a green-bottom white-character display screen with high contrast in a reflection mode can be manufactured by optimizing the thickness of the box and the design of the liquid crystal material; when the first polaroid is a blue polaroid with a dye system and the first polaroid is a green polaroid with a dye system, the white character display screen with a high contrast and a green bottom at the bottom of the blue part can be manufactured by matching with the second polaroid and optimizing the thickness of the box and the design of the liquid crystal material. Therefore, the requirements of various background colors of the conventional license plate can be met. It should be noted that, the part of the blue polarizer with dye system and the part of the green polarizer with dye system are the blue polarizers with dye system and the green polarizers with dye system in partial areas on the same product according to the requirement of customers on background color, and the partial areas are the green polarizers with dye system instead of using one polarizer to partially blue and partially green.
Further, the vertical alignment layer is coated on the first transparent electrode, and the parallel alignment layer is coated on the second transparent electrode.
The beneficial effects of adopting the further scheme are as follows: the arrangement of the vertical alignment layer and the parallel alignment layer is more stable.
Further, the first polarizer is a UV resistant polarizer.
The beneficial effects of adopting the further scheme are as follows: the invention has better liquid crystal display effect and higher display recognition degree, and has good visibility in outdoor environment or sunlight, and the anti-UV polaroid is a polaroid capable of absorbing more than 98% of 380nm UV light.
Further, the device also comprises a plurality of spacing balls, and a plurality of spacing balls are arranged in the closed cavity at intervals.
The beneficial effects of adopting the further scheme are as follows: the spacer balls are uniformly arranged between the first glass substrate and the second glass substrate and serve as spacers for liquid crystal, so that the distance between the two substrates is uniform, and the display effect of the liquid crystal is ensured.
Further, the sealing frame also comprises a plurality of silicon balls, and the silicon balls are arranged in the sealing frame at intervals.
The beneficial effects of adopting the further scheme are as follows: the inclusion content in the sealing frame is minimum through the silicon ball, the distribution is proper, and the shape is proper, so that the structure of the sealing frame is more stable.
Further, the LED display further comprises a diffusion sheet and a brightness enhancement sheet, wherein the diffusion sheet, the brightness enhancement sheet and the second polaroid are sequentially laminated and arranged on one side, far away from the first glass substrate, of the second glass substrate.
The beneficial effects of adopting the further scheme are as follows: the anti-UV polaroid, the diffusion sheet, the brightness enhancement sheet and the high-reflection polaroid can be used for manufacturing a liquid crystal display with the contrast ratio of more than 10:1 in a reflection mode, black and white display, basically zero power consumption under the condition of not refreshing display content, and the storage temperature of-30 ℃ to 85 ℃ and-40 ℃ to 90 ℃ can be achieved, so that the requirements of an intelligent electronic license plate display screen are met.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of the product of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. the light-emitting diode comprises a first glass substrate, 2, a second glass substrate, 3, a first transparent electrode, 4, a second transparent electrode, 5, a sealing frame, 6, a vertical alignment layer, 7, a parallel alignment layer, 8, liquid crystal, 9, a first polaroid, 10, a second polaroid, 11, a sealing cavity, 12, a spacer ball, 13, a silicon ball, 14, a diffusion sheet, 15 and a brightness enhancement sheet.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, an electronic license plate liquid crystal display with different background colors comprises a first glass substrate 1, a second glass substrate 2, a first transparent electrode 3, a second transparent electrode 4, a sealing frame 5, a vertical alignment layer 6, a parallel alignment layer 7, liquid crystal 8, a first polarizer 9 and a second polarizer 10, wherein the first glass substrate 1 and the second glass substrate 2 are arranged at intervals up and down, the first transparent electrode 3 is arranged on one side of the first glass substrate 1 facing the second glass substrate 2, the second transparent electrode 4 is arranged on one side of the second glass substrate 2 facing the first glass substrate 1, the sealing frame 5 is arranged in a ring shape and is arranged around the space between the first transparent electrode 3 and the second transparent electrode 4, a closed cavity 11 is formed among the sealing frame 5, the first transparent electrode 3 and the second transparent electrode 4, the vertical alignment layer 6 is disposed on the first transparent electrode 3, and faces the sealed cavity 11, one side of the vertical alignment layer 6 is in a zigzag or wave-shaped grating shape, the parallel alignment layer 7 is disposed on the second transparent electrode 4, and faces the sealed cavity 11, one side of the parallel alignment layer 7 is in a plane, the liquid crystal 8 is filled in the sealed cavity 11 and is disposed between the vertical alignment layer 6 and the parallel alignment layer 7, the first polarizer 9 is disposed on one side of the first glass substrate 1 away from the second glass substrate 2, the second polarizer 10 is disposed on one side of the second glass substrate 2 away from the first glass substrate 1, the first polarizer 9 is a single-color or multi-color polarizer with a transmission axis angle of 0 °, the second polarizer 10 is a reflective sheet with a transmission axis angle of 0%, and the reflectivity is larger than 35%, and the polarization angle of the first polarizer 9 is the same as that of the second polarizer 10.
According to the invention, the vertical alignment layer 6 is arranged on the surface of the first transparent electrode 3 of the first glass substrate 1, the vertical alignment layer 6 is made into a zigzag or wave-shaped grating shape, and the vertical alignment layer 6 is positioned into two stable states of a low pretilt angle and a high pretilt angle through the zigzag or wave-shaped grating, so that liquid crystal molecules can obtain two stable alignment states of vertical alignment and parallel alignment when no power is applied. The response time of the liquid crystal is mainly affected by the surface treatment of the substrate, and after the substrate is properly treated, the director of the nematic liquid crystal is aligned in a preferred direction, which is called a pretilt angle. The pretilt angle of the homeotropic alignment layer 6 is close to 90 °. By having the pretilt angle of the parallel alignment layer 7 smaller than 3 °, the liquid crystal molecules can be aligned parallel to the glass substrate in the rubbing direction when not energized and aligned perpendicular to the second glass substrate 2 when energized. The vertical alignment layer 6 in the grating shape on the surface of the first transparent electrode 3 of the first glass substrate 1 is matched with the horizontal parallel alignment layer 7 arranged on the surface of the second transparent electrode 4 of the second glass substrate 2, so that the liquid crystal obtains two stable alignment structures of torsion and vertical, a bistable nematic liquid crystal alignment structure is formed, stable and accurate display can be supported under the condition of power failure of the bistable nematic liquid crystal alignment, black and white display, high contrast ratio and wide viewing angle of the traditional license plate can be realized, the visibility under sunlight is good, power is basically not used when display information is maintained, and power consumption is only needed when display content is refreshed. In a preferred embodiment of the present invention, in order to make the vertical alignment layer 6 and the parallel alignment layer 7 be more stably disposed, the vertical alignment layer 6 is coated on the first transparent electrode 3, and the parallel alignment layer 7 is coated on the second transparent electrode 4. In addition, the product of the invention realizes that the electronic license plate liquid crystal display displays a background color with high contrast ratio in a reflection mode through the structural arrangement of the first polaroid 9 and the second polaroid 10. The bistable liquid crystal display with various personalized background colors can be manufactured by adopting the first polaroid 9 with different colors or the first polaroid 9 with different combined colors and the second polaroid 10, and the second polaroid 10 adopts the high-reliability neutral high-reflection sheet so as to meet the personalized requirements of the intelligent electronic license plate display screen. When natural light passes through the polarizer, the absorption axis of the polarizer means that light rays in the polarizer at the position parallel to the axis can be absorbed, the transmission axis of the polarizer means that light rays with the vibration direction parallel to the axis of the polarizer can be transmitted, and only polarized light rays with the vibration direction parallel to the transmission axis of the polarizer remain. The absorption axis and the transmission axis are perpendicular to each other. The polarization angle refers to the angle between the direction allowing light to pass through and the horizontal axis, i.e. the angle between the transmission axis of the polarizer and the horizontal axis of the product.
Considering that the electronic license plate needs to display different background colors to the traditional license plate, the first polaroid 9 is a dye-based blue polaroid, a dye-based green polaroid or a polaroid which is partially dye-based blue and partially dye-based green. When the first polaroid 9 is a dye-based blue polaroid, the blue bottom white display screen with high contrast in the reflection mode can be manufactured by matching with the second polaroid 10 and optimizing the thickness of the box and the design of the liquid crystal material; when the first polaroid 9 is a dye-based green polaroid, the green-bottom white character display screen with high contrast in a reflection mode can be manufactured by matching with the second polaroid 10 and optimizing the thickness of the box and the design of the liquid crystal material; when the first polarizer 9 is a blue polarizer with a dye system and the second polarizer 10 with a green polarizer with a dye system, a white character display screen with a high contrast and a blue bottom and a green bottom can be manufactured by optimizing the thickness of the box and the design of the liquid crystal material. Therefore, the requirements of various background colors of the conventional license plate can be met. It should be noted that, the part of the blue polarizer with dye system and the part of the green polarizer with dye system are the blue polarizers with dye system and the green polarizers with dye system in partial areas on the same product according to the requirement of customers on background color, and the partial areas are the green polarizers with dye system instead of using one polarizer to partially blue and partially green.
Preferably, the first polarizer 9 is a UV-resistant polarizer, which can make the liquid crystal display of the present invention have better effect and higher display recognition, and has good visibility in outdoor environment or sunlight, and it should be noted that the UV-resistant polarizer is a polarizer that can absorb more than 98% of 380nm UV light.
Further preferably, a diffusion sheet 14 and a brightness enhancing sheet 15 may be added, and the diffusion sheet 14, the brightness enhancing sheet 15, and the second polarizer 10 may be sequentially laminated on a side of the second glass substrate 2 remote from the first glass substrate 1. The anti-UV polaroid, the diffusion sheet 14, the brightness enhancement sheet 15 and the high-reflection polaroid can be used for manufacturing a liquid crystal display with the contrast ratio of more than 10:1 in a reflection mode, black and white display and basically zero power consumption under the condition of not refreshing display content, the operating temperature of-30 ℃ to 85 ℃ and the storage temperature of-40 ℃ to 90 ℃ can be achieved, and the requirements of an intelligent electronic license plate display screen are met.
Preferably, the device further comprises a plurality of spacing balls 12, and the plurality of spacing balls 12 are arranged in the closed cavity 11 at equal intervals. The spacers 12 are uniformly arranged between the first glass substrate 1 and the second glass substrate 2 and serve as spacers for the liquid crystal 8, so that the distance between the two substrates is uniform, and the display effect of the liquid crystal is ensured.
Preferably, the sealing frame further comprises a plurality of silicon balls 13, and the plurality of silicon balls 13 are arranged in the sealing frame 5 at equal intervals. The inclusion content in the sealing frame 5 is minimized through the silicon balls 13, the distribution is proper, the shape is proper, and the structure of the sealing frame 5 is more stable.
The structure of the azimuth bistable nematic liquid crystal display is characterized in that a zigzag grating structure is manufactured on the surface of an electrode of a first glass substrate 1 and a vertical alignment orientation layer is coated, so that a bistable nematic liquid crystal alignment structure is formed, and display under power failure can be supported. And by optimizing the thickness of the box and the design of the liquid crystal material and matching with the high-reliability UV-resistant polaroid, the diffusion sheet, the brightness enhancement sheet and the high-reflection sheet, the liquid crystal display with the contrast ratio of more than 10:1 in the reflection mode can be manufactured, black and white display can be realized, basically zero power consumption can be realized under the condition of not refreshing display content, the operating temperature of-30 ℃ to 85 ℃ and the storage temperature of-40 ℃ to 90 ℃ can be reached, and the requirements of the intelligent electronic license plate display screen can be met.
Along with the popularization and use of the electronic license plate and gradually replacing the traditional license plate, the global annual electronic license plate has a yield value of at least billions or even billions of dollars, and the product can generate excellent social and economic benefits if being applied to an electronic license plate display. The structure of the invention does not need the investment scale of hundreds of billions of a production line of TFT LCD or AMO LED, can be produced on a common STN LCD production line, has the investment of tens of millions of production line, is easy to control the process, and can be implemented in large scale.
It can be understood that the electronic license plate has all functions of a single RFID scheme, more comprehensively gives consideration to the license plate number display function of the traditional license plate, and maintains the maximum compatibility for the traditional automobile license plate recognition method, such as road surface duty traffic police, passers-by, traffic monitoring cameras and the like. In addition, the functions which the traditional license plate does not have can be added, such as real-time display of automobile stolen information, annual audit, insurance expiration information and the like on the license plate. In addition, the LTE network of the license plate can enable the daily management functions of vehicles such as application registration, annual examination and the like of license plate numbers to be completed in a wireless mode, and social operation cost of vehicle management can be remarkably saved.
In addition, it should be noted that the product of the present invention is a technology for implementing different background colors on an azimuthal bistable nematic liquid crystal display (Zenithal Bistable NEMATIC LCD), such as blue-bottom white, green-bottom white, or blue-green-bottom white. The display screen for the electronic license plate needs to meet the basic characteristics of black-and-white display, high contrast, visibility in sunlight, ultra-low power consumption, wide working and storage temperature range and the like. According to the technical scheme, a display screen for an electronic license plate is manufactured by adopting a azimuth bistable nematic liquid crystal display technology (Zenithal Bistable NEMATIC LCD), and a white background black character display screen with high contrast ratio in a reflection mode can be manufactured by optimizing the thickness of a box and the design of a liquid crystal material and matching a high-reliability UV-resistant polaroid, a diffusion sheet, a brightness enhancement sheet and a high-reflection sheet.
In a specific embodiment, if the front polarizer adopts a dye with a transmission axis angle of 0 degree as a blue polarizer, the rear polarizer also adopts a high-reliability neutral high-reflection sheet with a transmission axis angle of 0 degree, the polarization angles of the front polarizer and the rear polarizer remain the same, and a blue bottom white display screen with high contrast in a reflection mode can be manufactured by optimizing the thickness of a box and the design of liquid crystal materials and matching with a high-diffusion sheet and a brightness enhancement sheet. If the front polaroid adopts the dye system green polaroid with the 0-degree transmission axis angle, the rear polaroid also adopts the high-reliability neutral high-reflection sheet with the 0-degree transmission axis angle, the polarization angles of the front polaroid and the rear polaroid are kept the same, and the green-bottom white-character display screen with high contrast ratio under the reflection mode can be manufactured by optimizing the thickness of the box and the design of liquid crystal materials and matching with the high-diffusion sheet and the brightness enhancement sheet. If the front polaroid part adopts a dye-based blue polaroid part adopts a dye-based green polaroid, the rear polaroid adopts a high-reliability neutral high-reflection sheet, the front polaroid and the rear polaroid both adopt the same 0-degree transmission axis angle, and a part of blue bottom and green bottom white character display screen with high contrast ratio under a reflection mode can be manufactured by optimizing the thickness of a box and the design of liquid crystal materials and matching with a high diffusion sheet and a brightness enhancement sheet. Similarly, bistable liquid crystal displays with various personalized background colors can be manufactured by adopting front high-polarization sheets with different colors or the combination of the front high-polarization sheets with different colors so as to meet the personalized requirements of the intelligent electronic license plate display screen. It should be noted that, the 0-degree transmission axis angle is a specific optical orientation of the color polarizer, and means that an angle between a transmission axis of the polarizer and a horizontal axis of a product is 0 degrees.
The beneficial effects of the product of the invention are that: along with the popularization and use of the electronic license plate and gradually replacing the traditional license plate, the global annual electronic license plate has a yield value of at least billions or even billions of dollars, and the electronic license plate can generate excellent social and economic benefits if the electronic license plate is applied to an electronic license plate display.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The electronic license plate liquid crystal display with different background colors is characterized by comprising a first glass substrate (1), a second glass substrate (2), a first transparent electrode (3), a second transparent electrode (4), a sealing frame (5), a vertical alignment orientation layer (6), a parallel alignment orientation layer (7), liquid crystal (8), a first polaroid (9) and a second polaroid (10), wherein the first glass substrate (1) and the second glass substrate (2) are arranged at an upper-lower interval, the first transparent electrode (3) is arranged on one side of the first glass substrate (1) facing the second glass substrate (2), the second transparent electrode (4) is arranged on one side of the second glass substrate (2) facing the first glass substrate (1), the sealing frame (5) is arranged in a ring shape and is arranged around the first transparent electrode (3) and the second transparent electrode (4), a closed cavity (11) is formed between the sealing frame (5), the first transparent electrode (3) and the second transparent electrode (4), the vertical alignment orientation layer (6) is arranged on the first transparent electrode (3), one surface facing the closed cavity (11) is in a zigzag or wave grating shape, the parallel alignment orientation layer (7) is arranged on the second transparent electrode (4), the liquid crystal display device comprises a sealed cavity (11), wherein one surface facing the sealed cavity (11) is arranged in a plane, liquid crystal (8) is filled in the sealed cavity (11) and is positioned between a vertical alignment layer (6) and a parallel alignment layer (7), a first polaroid (9) is arranged on one side, far away from a second glass substrate (2), of the first glass substrate (1), a second polaroid (10) is arranged on one side, far away from the first glass substrate (1), of the second glass substrate (2), the first polaroid (9) is a single-color or multi-color polaroid with a transmission axis angle of 0 DEG, the second polaroid (10) is a reflecting sheet with a transmission axis angle of 0 DEG, the reflectivity is larger than 35%, and the polarization angles of the first polaroid (9) and the second polaroid (10) are the same; the liquid crystal is enabled to obtain two stable arrangement structures of distortion and vertical through the matching of the grating-shaped vertical alignment orientation layer on the surface of the first transparent electrode of the first glass substrate and the horizontal parallel alignment orientation layer arranged on the surface of the second transparent electrode of the second glass substrate.
2. The electronic license plate liquid crystal display of different background colors according to claim 1, wherein the first polarizer (9) is a dye-based blue polarizer, a dye-based green polarizer or a polarizer partially of dye-based blue and partially of dye-based green.
3. The electronic license plate liquid crystal display of different background colors according to claim 1, wherein the vertical alignment layer (6) is coated on the first transparent electrode (3), and the parallel alignment layer (7) is coated on the second transparent electrode (4).
4. Electronic license plate liquid crystal display of different background colors according to claim 1, characterized in that the first polarizer (9) is a UV-resistant polarizer.
5. The electronic license plate liquid crystal display of different background colors according to claim 1, further comprising a plurality of spacer balls (12), wherein the plurality of spacer balls (12) are arranged in the closed cavity (11) at intervals.
6. The electronic license plate liquid crystal display of different background colors according to claim 1, further comprising a plurality of silicon balls (13), wherein the silicon balls (13) are arranged in the sealing frame (5) at intervals.
7. Electronic license plate liquid crystal display of different background colors according to any of claims 1 to 6, further comprising a diffusion sheet (14) and a brightness enhancing sheet (15), wherein the diffusion sheet (14), the brightness enhancing sheet (15) and the second polarizer (10) are sequentially laminated on a side of the second glass substrate (2) away from the first glass substrate (1).
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| CN201810399635.1A CN108681156B (en) | 2018-04-28 | 2018-04-28 | Electronic license plate liquid crystal display with different background colors |
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