WO2019192428A1 - 显示***及其显示控制方法 - Google Patents
显示***及其显示控制方法 Download PDFInfo
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- WO2019192428A1 WO2019192428A1 PCT/CN2019/080820 CN2019080820W WO2019192428A1 WO 2019192428 A1 WO2019192428 A1 WO 2019192428A1 CN 2019080820 W CN2019080820 W CN 2019080820W WO 2019192428 A1 WO2019192428 A1 WO 2019192428A1
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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
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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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
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/32—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers characterised by the geometry of the parallax barriers, e.g. staggered barriers, slanted parallax arrays or parallax arrays of varying shape or size
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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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
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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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
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13725—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on guest-host interaction
Definitions
- Some embodiments of the present disclosure are directed to a display system and a display control method thereof.
- two-dimensional flat display can no longer meet people's needs, people want to be able to truly restore the three-dimensional information presented by the display, so three-dimensional display technology came into being.
- the user does not want other people to view the information of the display screen, and at this time, the display device needs to have a function of preventing peek.
- At least one embodiment of the present disclosure provides a display system including a display device, at least two layers of liquid crystal cells located on a light exit side of the display device, and a control device.
- the display device is configured to display a display screen; the at least two layers of liquid crystal cells are configured to control an exit angle of light of the display screen; and the control device is configured to control each layer of the liquid crystal cells in the at least two layers of liquid crystal cells The position and/or width of the light transmissive area and the light blocking area to control the display mode of the display screen.
- each layer of the liquid crystal cell includes: two opposite transparent electrode layers and a liquid crystal layer between the two transparent electrode layers.
- the two opposite transparent electrode layers each include a driving electrode configured to be applied with an electrical signal to control a corresponding liquid crystal layer to switch between a light transmitting state and an opaque state to be in the layers
- the light transmitting region and the light shielding region are formed on the liquid crystal cell.
- the driving electrodes are a plurality of strip electrodes extending along the same side.
- the liquid crystal layer is a polymer liquid crystal layer including a black dye
- the polymer liquid crystal layer including a black dye is in a light transmitting state in a state where no electric field is applied. In the state of applying an electric field, the opaque state is present.
- a set spacing exists between the display device and the at least two layers of liquid crystal cells and between the layers of liquid crystal cells.
- the display device includes a backlight module and a display panel on a light exiting side of the backlight module; the at least two layers of liquid crystal cells are located away from the display panel One side of the backlight module or between the backlight module and the display panel.
- the display device is an organic light emitting diode display device or a liquid crystal display device.
- control device is configured to control the at least two layers of liquid crystal cells to be in a light transmitting state such that the display mode is a two-dimensional planar display.
- control device is configured to control the at least two layers of liquid crystal cells to form the light-transmitting region and the light-shielding region that are spaced apart, and the at least two layers
- the orthographic projections of the light-transmitting regions of the liquid crystal cell on the display surface of the display device do not completely overlap such that the display mode is a three-dimensional stereoscopic display.
- the control device is configured to control the width of the light-transmitting region of the liquid crystal cell located in the intermediate layer to be larger than The width of the light-transmitting region of the two liquid crystal cells other than the intermediate layer, the width of the light-shielding region of the liquid crystal cell located in the intermediate layer is larger than the light-shielding region of the two liquid crystal cells except the intermediate layer.
- the width of the adjacent two layers of the light-transmitting regions of the liquid crystal cell does not completely overlap at the front projection of the display surface of the display device.
- the control device is configured to control the at least two layers of liquid crystal cells to form the light-transmitting region and the light-shielding region arranged at intervals, and except for the at least two layers
- Each of the liquid crystal cells other than the liquid crystal cell is in a completely transparent state, and the light-transmitting regions of the at least two liquid crystal cells have an overlapping area on the orthographic projection of the display surface of the display device, so that the display mode is a peep-proof display.
- the control device is configured to control the liquid crystal cell located in the intermediate layer to be in a completely transparent state, and the two layers of the liquid crystal are located outside the intermediate layer.
- the cartridges each include the light-transmissive regions and the light-shielding regions arranged at intervals, and the two regions of the liquid crystal cells other than the intermediate layer have exactly overlapped with the orthographic projection of the display surface of the display device.
- At least one embodiment of the present disclosure further provides a display control method for a display system, including: receiving a switching instruction of a user, determining a display mode that the display system needs to switch to; and applying the control mode according to the determined display mode An electrical signal on each of the drive electrodes of the liquid crystal cell is caused to cause the display system to switch to a display mode indicated by the switching command.
- the control when the display mode that the display system needs to switch to is a two-dimensional plane display, applies power to each driving electrode of each of the liquid crystal cells.
- the signal includes: controlling an electrical signal applied to each of the driving electrodes such that each of the liquid crystal cells is in a light transmitting state.
- the control when the display mode that the display system needs to switch to is a three-dimensional display, applies an electrical signal applied to each driving electrode of each of the liquid crystal cells.
- the method includes: controlling an electrical signal applied to each of the driving electrodes to form at least two layers of the liquid crystal cell to form a light-transmitting area and a light-shielding area arranged at intervals; and controlling a set frequency of each of the liquid crystal cells that is indistinguishable by a human eye Converting between a left eye mode and a right eye mode; in the left eye mode and the right eye mode, at least two layers of the light transmissive area of the liquid crystal cell are not completely orthographically projected on a display surface of the display device overlapping.
- the area covered by the outgoing light of the display device in the left-eye mode at least partially overlaps with the visible range of the left eye and the visible range of the right eye. There is no overlap; in the right eye mode, the area covered by the outgoing light of the display device at least partially overlaps with the visible range of the right eye without overlapping with the visible range of the left eye.
- the control when the display mode that the display system needs to switch to is a privacy display, applies an electrical signal applied to each driving electrode of each of the liquid crystal cells.
- the method includes: controlling an electrical signal applied to each of the driving electrodes to form the at least two layers of the liquid crystal cell to form the light-transmitting region and the light-shielding region which are arranged at intervals, and except for the at least two layers of liquid crystal cells
- Each of the liquid crystal cells is in a completely transparent state; and the light-transmitting regions of the at least two liquid crystal cells have overlapping regions on the orthographic projection of the display surface of the display device.
- the control is applied to each of the liquid crystal cells.
- the electrical signals on the driving electrodes include: controlling electrical signals applied to the driving electrodes, so that each of the liquid crystal cells is formed with the light-transmitting region and the light-shielding region arranged at intervals;
- the width of the light-transmitting region of the liquid crystal cell is larger than the width of the light-transmitting region of the two liquid crystal cells except the intermediate layer, so that the width of the light-shielding region of the liquid crystal cell located in the intermediate layer is greater than The width of the light-shielding region of the two liquid crystal cells other than the intermediate layer; the orthogonal projection of the light-transmitting regions of the two adjacent liquid crystal cells on the display surface of the display device does not completely overlap.
- the control is applied to each of the liquid crystal cells.
- the electrical signals on the driving electrodes include: controlling electrical signals applied to the driving electrodes, so that the liquid crystal cells located in the intermediate layer are in a completely transparent state, so that the two layers except the intermediate layer are located.
- the liquid crystal cell is formed with the light-transmissive region and the light-shielding region which are arranged at intervals; in addition to the two layers of the liquid crystal cell outside the intermediate layer, the orthographic projection of the light-transmitting region of the liquid crystal cell on the display surface of the display device is just complete overlapping.
- FIG. 1 is a schematic structural diagram of a display system according to some embodiments of the present disclosure
- FIG. 2 is a schematic cross-sectional view of a liquid crystal cell according to some embodiments of the present disclosure
- 3A is a schematic top plan view of a transparent electrode layer according to some embodiments of the present disclosure.
- 3B is a schematic top plan view of a grating provided by some embodiments of the present disclosure.
- FIG. 4A is a schematic diagram showing the operation of a liquid crystal cell according to some embodiments of the present disclosure.
- FIG. 4B is a schematic diagram showing the operation of a liquid crystal cell according to another embodiment of the present disclosure.
- FIG. 5A is a schematic structural diagram of a display system according to another embodiment of the present disclosure.
- FIG. 5B is a schematic structural diagram of a display system according to some embodiments of the present disclosure.
- FIG. 6 is a flowchart of a display control method according to some embodiments of the present disclosure.
- FIG. 7 is a schematic diagram of a two-dimensional planar display provided by some embodiments of the present disclosure.
- FIG. 8A is a schematic diagram of a three-dimensional stereoscopic display provided by some embodiments of the present disclosure.
- FIG. 8B is a schematic diagram of a three-dimensional stereoscopic display provided by other embodiments of the present disclosure.
- FIG. 9 is a schematic diagram of a privacy display according to some embodiments of the present disclosure.
- FIG. 10A is a schematic diagram of a three-dimensional stereoscopic display according to still another embodiment of the present disclosure.
- FIG. 10B is a schematic diagram of a three-dimensional stereoscopic display provided by still another embodiment of the present disclosure.
- FIG. 11 is a schematic diagram of a privacy display according to other embodiments of the present disclosure.
- a common display device may only have one of three-dimensional display or anti-spy display, and cannot simultaneously have multiple functions.
- how to make display devices have multiple functions for a variety of applications has become an urgent problem to be solved.
- At least one embodiment of the present disclosure provides a display system including a display device, at least two layers of liquid crystal cells located on a light exit side of the display device, and a control device.
- the display device is configured to display a display screen; at least two layers of the liquid crystal cell are configured to control an exit angle of the light of the display screen; and the control device is configured to control the position and/or width of the light-transmitting region and the light-shielding region of each layer of the liquid crystal cell to control the display The display mode of the screen.
- At least one embodiment of the present disclosure also provides a display control method corresponding to the above display system.
- the display system and the display control method thereof provided by the foregoing embodiments of the present disclosure simultaneously have various display modes such as two-dimensional flat display, three-dimensional stereo display, and anti-peep display, and can be between multiple display modes according to actual application scenarios. Switch.
- a display system provided by some embodiments of the present disclosure includes: a display device 11 , at least two layers of liquid crystal cells 12 on the light emitting side of the display device 11 , and a control device 13 .
- the display device is configured to display a display screen; at least two layers of the liquid crystal layer 12 are configured to control an exit angle of light of the display screen; and the control device 13 is configured to control the position of the light-transmitting region 22 and the light-shielding region 21 of each layer of the liquid crystal cell 12. / or width to control the display mode of the display screen.
- the light-transmitting region 22 is represented by a white rectangle
- the light-shielding region 21 is represented by a black rectangle.
- the display mode may be a three-dimensional display, a two-dimensional flat display, or a privacy display.
- the human eye views the display screen through the liquid crystal cell located on the display device 11, so that the display mode of the display screen viewed by the human eye can be controlled by the control device 13 adjusting the light transmission angle of the liquid crystal cell 12, so that the display can be made.
- the system has multiple display modes for a wide range of applications.
- the set spacing can be set according to the functions that need to be implemented, and the embodiment of the present disclosure does not limit this.
- the display device 11 includes, for example, a liquid crystal cell of 2 layers, 3 layers, 4 layers or more, and the specific setting may be determined according to actual conditions, and the embodiment of the present disclosure No restrictions.
- each layer of the liquid crystal cell 12 includes an opposite transparent electrode layer 121 and a liquid crystal layer 122 between the two transparent electrode layers 121.
- the material of the transparent electrode layer 121 may be the same or different, and may be a transparent material such as a glass substrate or a resin substrate, or may be a glass substrate and a resin substrate. Any combination of the embodiments of the present disclosure is not limited thereto.
- the two opposite transparent electrode layers 121 each include a driving electrode 1211.
- the drive electrode 1211 can be configured to be applied with an electrical signal to control the transition of the corresponding liquid crystal layer between the light transmissive state and the opaque state to form a corresponding light transmissive region and light blocking region on the liquid crystal cell.
- a region in which the liquid crystal layer is in a light transmitting state corresponds to a light transmitting region of the liquid crystal cell
- a region in which the liquid crystal layer is in an opaque state corresponds to a light blocking region of the liquid crystal cell.
- the drive electrodes 1211 are a plurality of strip electrodes extending along the same side; in other examples, for example, the drive electrodes 1211 on one transparent electrode layer may be planar electrodes, and the other transparent electrode
- the driving electrodes 1211 on the layers may be strip electrodes to form a grating structure as shown in FIG. 3B under the control of the driving electrodes on the respective transparent electrode layers.
- the grating structure includes spaced-apart light-transmissive regions 22 and light-shielding regions 21.
- the driving electrode 1211 may also be an electrode of other shapes capable of forming a grating, such as a diamond shape, etc., which is not limited by the embodiment of the present disclosure, and the following is an example in which the driving electrode 1211 is a strip electrode. Description.
- the strip electrodes 1211 located on the respective transparent electrode layers 121 may be arranged laterally or longitudinally, and the arrangement direction thereof is not limited as long as the overlapping portions are satisfied to form an electric field to control the deflection of the liquid crystal molecules 201 to form a grating.
- the material of the strip electrode 1211 may be a transparent conductive material.
- the transparent conductive material may be a material including a transparent metal oxide such as indium tin oxide (ITO) or indium zinc oxide (IZO), which is not limited in the embodiment of the present disclosure.
- each strip electrode 1211 passes through a port (not shown in FIGS. 1-3) located on the left and right sides of each transparent electrode layer 121, and a wire (not shown) connected to the port, respectively.
- a port not shown in FIGS. 1-3
- a wire not shown
- the display system can be used for two-dimensional planar display, three-dimensional stereoscopic display, and anti-peep display, respectively.
- each liquid crystal cell can be adjusted according to the state of the liquid crystal cell corresponding to the desired display mode, thereby achieving free switching between different display modes.
- the light blocking region may include at least one strip electrode.
- the width and position of the light-shielding region can be controlled by controlling the number and position of the strip electrodes included in the light-shielding region. For example, by applying an electrical signal to any combination of continuously arranged strip electrodes by the control device, light-shielding regions of different positions and widths can be formed, thereby realizing different display modes.
- the following embodiments are the same as those described herein and will not be described again.
- the liquid crystal layer 122 described above may employ a polymer liquid crystal layer including a black dye 123 in the polymer liquid crystal layer.
- the black dye has dichroism, has the same properties as liquid crystal molecules, and can exhibit different arrangements under the action of an electric field.
- the black dye molecules in the polymer liquid crystal layer including the black dye and the pointing vector (long-axis direction) of the liquid crystal molecules are randomly distributed in a state where no electric field is applied, so the liquid crystal cell is Light transmission state.
- the black dye molecules and the liquid crystal molecules in the polymer liquid crystal layer including the black dye are included.
- the pointing vectors are all parallel to the direction of the electric field, and the dye molecules exhibit significant color in the long axis direction and appear black, so the liquid crystal cell is opaque under the action of the electric field.
- control device 13 may be various devices that can implement control functions, such as a central processing unit (CPU), a data signal processor (DSP), etc., and can also be field-programmable through a semiconductor chip. Gate array (FPGA) and other ways to achieve.
- CPU central processing unit
- DSP data signal processor
- FPGA Gate array
- the control device 13 can include a processor and a memory (not shown).
- the processor may be a central processing unit (CPU) or other form of processing unit having data processing capability and/or instruction execution capability, and may be a general purpose processor or a dedicated processor, and may be an X86 or ARM architecture based processor or the like. Wait.
- the storage device may comprise one or more computer program products, which may comprise various forms of computer readable storage media, such as volatile memory and/or nonvolatile memory.
- the volatile memory may include, for example, a random access memory (RAM) and/or a cache or the like.
- the nonvolatile memory may include, for example, a read only memory (ROM), a hard disk, a flash memory, or the like.
- One or more computer program instructions can be stored on the computer readable storage medium, and the processor can execute the program instructions to implement the functions (implemented by the processor) and/or other of the described embodiments of the present disclosure.
- the desired function can also be stored in the computer readable storage medium.
- the display device 11 in the display system provided by some embodiments of the present disclosure may adopt various forms of display devices, which are not limited in the embodiments of the present disclosure.
- the display device 11 further includes a backlight module 111 and a display panel 112 located on the light exit side of the backlight module 111 .
- the display device 11 is a display device that provides a light source by the backlight module 111
- the multi-layer liquid crystal cell 12 can be disposed on a side of the display panel 112 facing away from the backlight module 111 (as shown in FIG. 5A), or can be disposed on the backlight module.
- the group 111 is between the display panel 112 (as shown in FIG. 5B).
- the multi-layer liquid crystal cell when the multi-layer liquid crystal cell is disposed in a different position such as that shown in FIG. 5A or FIG. 5B in the display system, since the distance of the multi-layer liquid crystal cell from the display surface of the display panel is different, The spacing between the liquid crystal cells and the position and/or width of the light-transmitting region 22 and the light-shielding region 21 in each liquid crystal cell can be adjusted accordingly according to the needs of the actual application, so that the display system can be in various display modes according to actual conditions. Free switching function.
- the display device 11 can be a liquid crystal display device.
- the display panel can be a liquid crystal display panel.
- the display device may also be a self-illuminating display device.
- the display device may be an Organic Light-Emitting Diode (OLED) display device, and the implementation of the present disclosure. This example does not limit this.
- OLED Organic Light-Emitting Diode
- the display device 11 can also adopt other types of display devices, and the multi-layer liquid crystal cell needs to be disposed on the light-emitting side of the display device 11 or the display panel 112, which realizes the principle of switching between display modes and the above two
- the display device is similar and will not be described here. Display devices that implement display mode switching using the disclosed concepts are all within the scope of the present disclosure.
- the display system provided by the above embodiments of the present disclosure can apply electrical signal control to each strip electrode of each liquid crystal cell according to actual needs, thereby controlling the position and width of the light-transmitting region and the light-shielding region formed by each liquid crystal cell, thereby realizing more Switch between display modes.
- some embodiments of the present disclosure further provide a display control method based on the above display system, which may be implemented at least partially in software, hardware, firmware, or any combination thereof for controlling a display system to implement display in a two-dimensional plane.
- the function of switching between display modes such as three-dimensional display and anti-spy display.
- the display control method provided by some embodiments of the present disclosure includes steps S601-S602.
- the display control method provided by some embodiments of the present disclosure will be described in detail below with reference to FIG.
- Step S601 Receive a switching instruction of the user, and determine a display mode that the display system needs to switch to;
- Step S602 Control an electric signal applied to each driving electrode of each liquid crystal cell according to the determined display mode to switch the display system to the display mode indicated by the switching instruction.
- switching between a plurality of display modes can be realized by controlling strip electrodes of the respective liquid crystal cells.
- the two-dimensional plane display and the three-dimensional stereoscopic display can be switched between each other, and the mutual switching between the two-dimensional plane display and the anti-spy display can be realized, and the mutual switching between the anti-spy display and the three-dimensional display can also be realized.
- the anti-spy angle can be adjusted in the anti-spy display mode.
- the position of the light-transmitting region and the light-shielding region formed by each liquid crystal cell can be adjusted by adjusting electrical signals applied to the strip electrodes of the respective liquid crystal cells. / or width, thereby changing the angle of exit of the light emitted by the display device, thereby achieving a variety of display modes.
- the switching instruction may include, for example, switching between a two-dimensional plane display and a three-dimensional stereoscopic display, switching between the two-dimensional plane display and the anti-spy display, and mutual interaction between the anti-spy display and the three-dimensional display.
- the specific instructions may be determined according to actual conditions, and the embodiments of the present disclosure do not limit this.
- the control device 13 supplies a corresponding electrical signal to the liquid crystal cell according to the display mode to control each liquid crystal cell to form a completely light transmitting structure or a grating structure to realize switching of various display modes.
- step S602 when the determined display mode to be switched to the display mode is a two-dimensional display, the electrical signals applied to the strip electrodes of the respective liquid crystal cells are controlled, which may specifically include: The electric signals applied to the strip electrodes are controlled so that the liquid crystal cells are in a light transmitting state.
- each layer of the liquid crystal cell located on the light exit side of the display device includes a polymer liquid crystal layer mixed with a black dye. Since both the dye molecules and the polymer liquid crystal molecules have dichroism, the display along the long axis of the molecule is obvious, so When a voltage is applied, the two molecules are randomly distributed, and the liquid crystal cell is completely transparent. No electric field is applied to each of the liquid crystal cells on the light-emitting side of the display device, so that each of the liquid crystal cells is completely transparent. That is, in this mode, each of the liquid crystal cells includes only the light-transmitting region 22, and does not include the light-shielding region. Thereby, the emitted light of the display image of the display device 11 is completely transmitted through the respective liquid crystal cells 12 as shown in FIG. 7 to realize two-dimensional plane display.
- controlling the electrical signals applied to the strip electrodes of the respective liquid crystal cells may specifically include: controlling Applying an electric signal on each strip electrode to form at least two layers of liquid crystal cells to form a light-transmitting region 22 and a light-shielding region 21 arranged at intervals; controlling each liquid crystal cell in a left-eye mode and a right eye at a set frequency that is indistinguishable by the human eye Conversion between modes.
- the orthographic projections of the light transmissive areas of at least two layers of the liquid crystal cell on the display surface of the display device do not completely overlap; in the left eye mode, the area of the display device that covers the emitted light and the left side The visible range of the eye at least partially overlaps with no visible area of the right eye; in the right eye mode, the area covered by the outgoing light of the display device at least partially overlaps with the visible range of the right eye and is visible to the left eye The range has no overlapping areas.
- the three-dimensional display of the display system utilizes the parallax generated by the human left eye viewing image and the right eye viewing image to fuse the brain into a three-dimensional stereoscopic image.
- the left eye mode can be targeted for two eyes. Quickly switch between the right eye mode and the right eye mode.
- the human eye does not perceive the flickering of the picture and merges into a stereoscopic image in the brain.
- the display image cannot be observed by the right eye
- the right eye mode the display image cannot be observed by the left eye.
- FIG. 8A and FIG. 8B FIG.
- FIG. 8A shows the emission range of the light of the display system in the right eye mode
- FIG. 8B shows the emission range of the light of the display system in the left eye mode.
- the arrangement of the light-transmitting region 22 and the light-shielding region 21 of each liquid crystal cell in the two modes is different.
- By controlling the strip electrodes of the respective liquid crystal cells at least two layers of the liquid crystal cells are arranged at intervals of a set width.
- the maximum angle between the light emitted from the display device in the direction of the right eye and the display surface of the display device is ⁇ 1
- the area covered by the emitted light having an angle smaller than ⁇ 1 with the display surface and the right is as shown in FIG.
- the maximum value of the included angle is ⁇ 1, and the area covered by the portion of the outgoing light that is smaller than ⁇ 1 on the display surface does not overlap with the visible range of the left eye, indicating that the left eye cannot receive the outgoing light of the display device. That is, the display image of the display device cannot be viewed, thereby realizing the display of the right eye mode.
- the display device When switching from the right eye mode to the left eye mode, it is necessary to adjust the positions of the light transmission area and the light shielding area of each liquid crystal cell.
- the arrangement of the adjusted liquid crystal cells is shown in FIG. 8B, and the display device is emitted in the direction of the right eye.
- the maximum value of the angle between the light and the display surface of the display device is ⁇ 2, and when the area covered by the portion of the output light that is smaller than ⁇ 2 on the display surface and the visible range of the right eye does not overlap with each other, the right eye is illustrated.
- the output light of the display device cannot be received, that is, the right eye cannot view the display image of the display device; and at this time, the maximum value of the angle between the light emitted from the display device and the display surface in the direction of the left eye is ⁇ 2, and the display surface
- the left eye can receive the outgoing light of the display device, that is, the left eye can view the display of the display device.
- the image thereby realizing the display of the left eye mode.
- the left eye mode and the right eye mode are switched at a frequency that is indistinguishable by the human eye, a three-dimensional stereoscopic image can be viewed due to the effect of the residual of the human eye.
- controlling the electrical signals applied to the strip electrodes of the respective liquid crystal cells may specifically include: controlling The electric signals applied to the strip electrodes form at least two layers of the liquid crystal cell to form the light-transmitting regions 22 and the light-shielding regions 21 which are arranged at intervals, and the other liquid crystal cells are completely transparent. For example, there is an overlapping area in the orthographic projection of the light-transmitting region 22 of each liquid crystal cell on the display surface of the display device.
- the anti-spy display can be used to view the display image of the display device within a set angle range (for example, ⁇ 30°) when the human eye views the display screen, and cannot display the display image beyond the angle range.
- the viewing angle will be in the vicinity of the front view angle and the range will not be too large, that is, it is necessary to control the emission of light that deviates from the front view angle.
- the electric signals applied to the strip electrodes of the respective liquid crystal cells can be controlled such that at least two liquid crystal cells form the light-transmitting regions 22 and the light-shielding regions 21 which are arranged at intervals, and Other liquid crystal cells are in a state of complete light transmission.
- the at least two layers of the light-transmitting region 22 of the liquid crystal cell having the light-shielding region 21 and the light-transmitting region 22 have an overlapping area on the display surface of the display device, so that the light emitted from the display device can be emitted outward from the overlapping region. So that the viewing angle is within the range of ⁇ shown in FIG.
- the thickness of the light-shielding region can be increased, thereby effectively controlling the exit of the large-angle light far from the normal line, thereby Achieve large-angle anti-spy display.
- the display system includes a three-layer liquid crystal cell as an example.
- the control system for the two-dimensional plane display has the same control method as the above-mentioned control method including at least two layers, and can control the three-layer liquid crystal cell to be completely transparent to realize two-dimensional plane display.
- the electrical signals applied to the strip electrodes can be controlled such that each of the liquid crystal cells forms a light-transmitting region 22 and a light-shielding region 21 which are arranged at intervals.
- FIGS. 10A and 10B show the arrangement of the light-transmitting region 22 and the light-shielding region 21 formed by the three-layer liquid crystal cell.
- FIG. 10A shows the arrangement of the light-transmitting region 22 and the light-shielding region 21 in the three-layer liquid crystal cell in the right-eye mode
- FIG. 10B shows the light-transmitting region 22 and the light-shielding region 21 in the three-layer liquid crystal cell in the left-eye mode. Arrangement.
- the arrangement of the light-transmitting region 22 and the light-shielding region 21 in the liquid crystal cell is such that the width of the light-transmitting region 22 of the liquid crystal cell located in the intermediate layer is greater than that of the light-transmitting region 22 of the other two-layer liquid crystal cell.
- the width of the light-shielding region 21 of the liquid crystal cell located in the middle layer is larger than the width of the light-shielding region 21 of the other two-layer liquid crystal cell; the orthographic projection of the light-transmitting region 22 of the adjacent two-layer liquid crystal cell on the display surface of the display device is incomplete overlapping.
- the width of the light-shielding region 21 can be determined by the number of strip electrodes it includes.
- the light-shielding region 21 of the liquid crystal cell located in the intermediate layer includes five consecutive strip electrodes, for example, an electrical signal is applied to the five strip electrodes by the control device 13 to form the light-shielding region.
- the light-shielding region 21 in the remaining layers of the liquid crystal cell includes three continuous electrodes, so that the width of the light-shielding region 21 of the liquid crystal cell located in the intermediate layer is greater than the width of the light-shielding region 21 of the other two-layer liquid crystal cell.
- the formation principle of the light shielding area 21 is similar, and will not be described below.
- the light-transmitting region 22 and the light-shielding region 21 formed by the three liquid crystal cells each constitute a grating structure, and the grating period formed by the liquid crystal cell located in the intermediate layer (the sum of the widths of the adjacent light-shielding regions 21 and the light-transmitting regions 22) is larger than the other two.
- the grating period formed by the layer liquid crystal cell can roughly adjust the outgoing direction of the outgoing light, and the grating period formed by the liquid crystal cells located on the upper and lower sides can further adjust the outgoing light of the light, thereby making FIG. 10A In the right eye mode shown, only the right eye can view the display image, so that only the left eye can view the display image in the left eye mode as shown in FIG. 10B.
- the left eye mode and the right eye mode are switched at a frequency that is indistinguishable by the human eye, a stereoscopic image can be observed.
- the three-dimensional display can be implemented by using other arrangements.
- the embodiments of the present disclosure are merely illustrative, and other arrangements for realizing the three-dimensional display are not limited.
- the electrical signals applied to the strip electrodes can be controlled to form the three-layer liquid crystal cell in an arrangement as shown in FIG.
- the liquid crystal cell located in the middle layer is in a completely transparent state, and the other two liquid crystal cells are formed with the light-transmitting regions 22 and the light-shielding regions 21 arranged at intervals; the light-transmitting regions 22 of the other two-layer liquid crystal cells except the intermediate layer are The orthographic projections of the display surfaces of the display devices just overlap completely.
- the liquid crystal cell controlling the middle layer is in a completely transparent state, and the liquid crystal cell on the upper and lower sides is controlled to control the outgoing direction of the light, which is equivalent to thickening the overall thickness of the liquid crystal cell, and can more effectively control the exit of the large angle light.
- the anti-peep angle can be controlled within the angle ⁇ ', and the small range near the front view angle cannot be realized.
- Anti-seeing control while using the liquid crystal box on the upper and lower sides to control the direction of light emission, the anti-peep angle can be controlled within ⁇ , effectively preventing the speculative light from the large angle.
- the control of the arrangement of the liquid crystal cells on the upper and lower sides can be controlled to reduce the complexity of the control. In practical applications, the arrangement of the liquid crystal cells can be controlled in other ways, which is not limited herein.
- the flow of the display control method provided by some embodiments of the present disclosure may include more or less operations, which may be performed sequentially or in parallel.
- the flow of the display control method described above includes a plurality of operations occurring in a specific order, it should be clearly understood that the order of the plurality of operations is not limited.
- the display control method described above may be performed once or multiple times according to predetermined conditions.
- electrical signal control can be applied to each strip electrode of each liquid crystal cell according to actual needs, thereby controlling the position and width of the light-transmitting region and the light-shielding region formed by each liquid crystal cell, thereby realizing Switching between multiple display modes.
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Abstract
Description
Claims (19)
- 一种显示***,包括:显示装置、位于所述显示装置出光侧的至少两层液晶盒以及控制装置;其中,所述显示装置配置为显示显示画面;所述至少两层液晶盒配置为控制所述显示画面的光线的出射角度;以及所述控制装置配置为控制所述至少两层液晶盒中各层液晶盒的透光区域和遮光区域的位置和/或宽度,以控制所述显示画面的显示模式。
- 如权利要求1所述的显示***,其中,所述各层液晶盒包括:相对设置的两个透明电极层以及位于两个所述透明电极层之间的液晶层;其中,相对设置的两个所述透明电极层均包括驱动电极,所述驱动电极配置为被施加电信号以控制对应的液晶层在透光状态和不透光状态之间转换,以在所述各层液晶盒上形成所述透光区域和所述遮光区域。
- 如权利要求2所述的显示***,其中,所述驱动电极为沿同一方延伸的多个条状电极。
- 如权利要求2或3所述的显示***,其中,所述液晶层为包括黑色染料的聚合物液晶层,所述包括黑色染料的聚合物液晶层在未施加电场状态下呈所述透光状态,在施加电场状态下呈所述不透光状态。
- 如权利要求1-4任一所述的显示***,其中,所述显示装置与所述至少两层液晶盒之间以及在所述各层液晶盒之间均存在设定间距。
- 如权利要求1-5任一所述的显示***,其中,所述显示装置包括:背光模组以及位于所述背光模组出光侧的显示面板;所述至少两层液晶盒均位于所述显示面板背离所述背光模组的一侧,或者位于所述背光模组与所述显示面板之间。
- 如权利要求1-5任一所述的显示***,其中,所述显示装置为有机发光二极管显示装置或液晶显示装置。
- 如权利要求1-7任一所述的显示***,其中,所述控制装置配置为控制所述至少两层液晶盒均为透光状态,以使得所述显示模式为二维平面显示。
- 如权利要求1-7任一所述的显示***,其中,所述控制装置配置为控 制所述至少两层液晶盒均形成间隔排列的所述透光区域和所述遮光区域,且所述至少两层液晶盒的透光区域在所述显示装置的显示面上的正投影不完全重叠,以使得所述显示模式为三维立体显示。
- 如权利要求9所述的显示***,其中,在所述显示***包括三层液晶盒时,所述控制装置配置为控制位于中间层的所述液晶盒的透光区域的宽度大于位于除所述中间层以外的两层所述液晶盒的透光区域的宽度,位于中间层的所述液晶盒的遮光区域的宽度大于位于除所述中间层以外的两层所述液晶盒的遮光区域的宽度,相邻两层所述液晶盒的透光区域在所述显示装置的显示面的正投影不完全重叠。
- 如权利要求1-7任一所述的显示***,其中,所述控制装置配置控制所述至少两层液晶盒均形成间隔排列的所述透光区域和所述遮光区域,且除所述至少两层液晶盒以外的各液晶盒为完全透光状态,所述至少两层液晶盒的透光区域在所述显示装置的显示面的正投影均存在重叠区域,以使得所述显示模式为防窥显示。
- 如权利要求11所述的显示***,其中,在所述显示***包括三层所述液晶盒时,所述控制装置配置为控制位于中间层的所述液晶盒处于完全透光状态,使位于除所述中间层以外的两层所述液晶盒均包括间隔排列的所述透光区域和所述遮光区域,其中,位于除所述中间层以外的两层所述液晶盒的透光区域在所述显示装置的显示面的正投影恰好完全重叠。
- 一种如权利要求1-12任一项所述的显示***的显示控制方法,包括:接收用户的切换指令,确定所述显示***需要切换到的显示模式;根据确定出的所述显示模式控制施加在各所述液晶盒的各驱动电极上的电信号,以使所述显示***切换到所述切换指令所指示的显示模式。
- 如权利要求13所述的显示控制方法,其中,在所述显示***需要切换到的显示模式为二维平面显示时,所述控制施加在各所述液晶盒的各驱动电极上的电信号,包括:控制施加在各所述驱动电极上的电信号,使各所述液晶盒均处于透光状态。
- 如权利要求13所述的显示控制方法,其中,在所述显示***需要切换到的显示模式为三维立体显示时,所述控制施加在各所述液晶盒的各驱动电极上的电信号,包括:控制施加在各所述驱动电极上的电信号,使所述至少两层液晶盒形成间隔排列的所述透光区域和所述遮光区域;控制各所述液晶盒以人眼不可分辨的设定频率在左眼模式与右眼模式间转换;其中,在所述左眼模式以及所述右眼模式中,所述至少两层液晶盒的透光区域在所述显示装置的显示面上的正投影不完全重叠。
- 如权利要求15所述的显示控制方法,其中,在所述左眼模式下,所述显示装置的出射光覆盖的区域与左眼的可视范围至少部分重叠而与右眼的可视范围无重叠;在所述右眼模式下,所述显示装置的出射光覆盖的区域与右眼的可视范围至少部分重叠而与左眼的可视范围无重叠。
- 如权利要求13所述的显示控制方法,其中,在所述显示***需要切换到的显示模式为防窥显示时,所述控制施加在各所述液晶盒的各驱动电极上的电信号,包括:控制施加在各所述驱动电极上的电信号,使所述至少两层液晶盒形成间隔排列的所述透光区域和所述遮光区域,且除所述至少两层液晶盒以外的各所述液晶盒为完全透光状态;其中,所述至少两层液晶盒的透光区域在所述显示装置的显示面的正投影均存在重叠区域。
- 如权利要求13所述的显示控制方法,其中,在所述显示***包括三层所述液晶盒且所述显示***用于三维立体显示时,所述控制施加在各所述液晶盒的各驱动电极上的电信号,包括:控制施加在各所述驱动电极上的电信号,使各所述液晶盒均形成间隔排列的所述透光区域与所述遮光区域;其中,位于中间层的所述液晶盒的透光区域的宽度大于位于除所述中间层以外的两层所述液晶盒的透光区域的宽度,位于中间层的所述液晶盒的遮光区域的宽度大于位于除所述中间层以外的两层所述液晶盒的遮光区域的宽度;相 邻两层所述液晶盒的透光区域在所述显示装置的显示面的正投影不完全重叠。
- 如权利要求13所述的显示控制方法,其中,在所述显示***包括三层所述液晶盒且所述显示***用于防窥显示时,所述控制施加在各所述液晶盒的各驱动电极上的电信号,包括:控制施加在各所述驱动电极上的电信号,使位于中间层的所述液晶盒处于完全透光状态,使位于除所述中间层以外的两层所述液晶盒均形成间隔排列的所述透光区域和所述遮光区域;其中,位于除所述中间层以外的两层所述液晶盒的透光区域在所述显示装置的显示面的正投影恰好完全重叠。
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CN108490703B (zh) * | 2018-04-03 | 2021-10-15 | 京东方科技集团股份有限公司 | 一种显示***及其显示控制方法 |
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CN108490703B (zh) | 2021-10-15 |
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