WO2018161904A1 - 防窥显示装置及防窥显示方法 - Google Patents

防窥显示装置及防窥显示方法 Download PDF

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Publication number
WO2018161904A1
WO2018161904A1 PCT/CN2018/078182 CN2018078182W WO2018161904A1 WO 2018161904 A1 WO2018161904 A1 WO 2018161904A1 CN 2018078182 W CN2018078182 W CN 2018078182W WO 2018161904 A1 WO2018161904 A1 WO 2018161904A1
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Prior art keywords
layer
liquid crystal
display
crystal grating
spy
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PCT/CN2018/078182
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English (en)
French (fr)
Inventor
李忠孝
陈小川
赵文卿
杨明
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京东方科技集团股份有限公司
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Priority to US16/305,098 priority Critical patent/US10948751B2/en
Publication of WO2018161904A1 publication Critical patent/WO2018161904A1/zh

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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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • 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
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/02—Composition of display devices
    • G09G2300/023—Display panel composed of stacked panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/068—Adjustment of display parameters for control of viewing angle adjustment
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2358/00—Arrangements for display data security

Definitions

  • the present invention relates to the field of anti-spy display technology, and in particular to an anti-spy display device and a peep prevention display method.
  • Liquid crystal display technology has become the mainstream display technology in the market. It has been able to meet the needs of users in terms of pixel resolution, response time, screen size and many other display technologies.
  • users need special display modes. To meet specific needs, such as in an office environment or other private environment, the user needs the screen to be visible only to others, and others are not visible. This is the anti-spy display mode; in some cases, the display system needs to be shared with multiple people. Is the shared display mode.
  • the existing anti-spy display technology is mainly realized by adding a special anti-peep film, which can only realize the anti-spy display function and cannot realize the switching of the anti-spy display and the shared display.
  • the existing anti-spy display device adds other structures based on the above design to realize the switching display of the anti-spy display and the shared display, but causes the device to be too thick and the cost is too high.
  • One technical problem to be solved by the present invention is how to provide an anti-spy display device having a thin device and a low cost.
  • Another technical problem to be solved by the present invention is how to provide a privacy-proof display method.
  • the present invention adopts the following technical solutions:
  • a privacy display device wherein the anti-spy display device includes a display layer and a liquid crystal grating layer; the liquid crystal grating layer is disposed on one side of the display layer, and the liquid crystal grating layer
  • the resolution of the display layer is the same as the resolution of the display layer
  • the liquid crystal grating layer comprises two glass substrates and a liquid crystal layer; the two glass substrates are disposed opposite to each other; the liquid crystal layer is sandwiched between the two layers of the glass substrate
  • a plurality of gratings of the liquid crystal grating layer can be controlled to switch between black and white, thereby controlling the anti-spy display device between the anti-spy display mode and the shared display mode Conversion.
  • the display layer is an LCD layer
  • the anti-spy display device further includes a backlight layer
  • the liquid crystal grating layer is disposed between the LCD layer and the backlight layer.
  • the display layer is a self-luminous display layer
  • the liquid crystal grating layer is disposed on a side of a light-emitting direction of the self-luminous display layer.
  • the aperture ratio of the display layer is the same as the aperture ratio of the liquid crystal grating layer.
  • each opening position of the display layer is in one-to-one correspondence with each opening position of the liquid crystal grating layer.
  • the display layer and the liquid crystal grating layer are bonded together through a glass paste.
  • the liquid crystal layer of the liquid crystal grating layer adopts a TN type liquid crystal deflection mode.
  • the liquid crystal grating layer further includes an electrode; the electrode is disposed in the liquid crystal layer and connected to an external circuit via a peripheral trace; wherein the liquid crystal layer is passed through the electrode A voltage signal is applied to control a plurality of said gratings of said liquid crystal grating layer to switch between black and white.
  • each of the gratings of the liquid crystal grating layer changes from black to white at the same time, and simultaneously changes from white to black.
  • an anti-spy display method for providing a privacy protection function to a display device, wherein the anti-spy display method comprises the following steps:
  • liquid crystal grating layer comprising two glass substrates disposed opposite to each other and a liquid crystal layer interposed between the two glass substrates, and the resolution of the liquid crystal grating layer is the same as the resolution of the display layer ;
  • the invention provides an anti-spy display device and a anti-spy display method, which can realize the anti-spy function of the display device by providing a liquid crystal grating layer on one side of the display layer, that is, adding only one device structure of the liquid crystal grating layer in the existing structure. Therefore, the display device is switched between the anti-spy display mode and the shared display mode, and the device has a simple structure, a thin thickness, and a small cost increase.
  • FIG. 1 is an optical schematic diagram of an anti-spy display device according to an exemplary embodiment.
  • Display layer 20. Liquid crystal grating layer; 3-1. Red sub-pixel open area; 3-2. Green sub-pixel open area; 3-3. Blue sub-pixel open area; D1. First visible area; D2. Anti-peep area; D3. Second view area.
  • a privacy display device capable of embodying the principles of the present invention is representatively shown in Fig. 1.
  • the anti-spy display device proposed by the present invention is described by taking an LCD display device as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other modifications are made to the specific embodiments described below in order to adapt the design of the anti-spy display device to other types of display devices. Variations, these variations are still within the scope of the principles of the anti-spy display device proposed by the present invention.
  • the anti-spyness display device proposed by the present invention mainly includes a display layer 10, a liquid crystal grating layer 20, and a backlight layer. It should be noted that, as shown in Fig. 1, the laminated relationship and optical path of each main structure of the present invention are briefly shown.
  • the openings on the liquid crystal grating layer 20 respectively represent the red sub-pixel opening area 3-1, the green sub-pixel opening area 3-2 and the blue sub-pixel opening area 3-3 of the display device, that is, the expression as the sub-pixel color film. .
  • the main components of the anti-spy display device proposed by the present invention will be described in detail below with reference to the above drawings.
  • the liquid crystal grating layer 20 is provided on the display layer 10 side, and the display layer is an LCD layer.
  • the liquid crystal grating layer 20 includes two glass substrates and a liquid crystal layer. The two glass substrates are disposed opposite to each other, and the liquid crystal layer is sandwiched between the two glass substrates. Based on the above structural design, by adjusting the liquid crystal layer, it is possible to control the plurality of gratings of the liquid crystal grating layer 20 to switch between black and white, thereby controlling the anti-spy function of the anti-spy display device, that is, controlling the anti-spy display device in the anti-spy display mode Convert between shared display mode.
  • the display layer may also be a self-luminous display layer, such as an OLED layer, etc.
  • the liquid crystal grating layer 20 may be disposed on one side of the self-luminous display layer (for example, the side of the light-emitting display layer in the light-emitting direction, ie,
  • the anti-spy display device proposed by the present invention is adapted to a self-illuminating display device, such as an OLED display device, and is not described herein.
  • the opening of the opening on the display layer 10 is displayed.
  • the rate is the same as the aperture ratio of the grating opening on the liquid crystal grating layer 20.
  • the opening positions of the respective openings of the display layer 10 are in one-to-one correspondence with the opening positions of the grating openings of the liquid crystal grating layer 20.
  • the opening ratio and the opening position of the opening of the display layer 10 and the grating opening of the liquid crystal grating layer 20 are not limited to the above design, and can be flexibly adjusted according to the actual demand for the visible area.
  • the display layer 10 and the liquid crystal grating layer 20 are bonded together through the entire surface of the glass paste.
  • the display layer 10 and the liquid crystal grating layer 20 may also be combined by other materials or means.
  • the distance between the liquid crystal grating layer 20 and the display layer 10 matches the parameters such as the pixel size and the aperture ratio of the above two, and the distance between the liquid crystal grating layer 20 and the display layer 10 can be adjusted by adjusting the thickness of the glass paste. Adjustment.
  • the resolution of the liquid crystal grating layer 20 is the same as the resolution of the display layer 10, and there is no loss of resolution in the anti-spy display mode, and the viewing effect of the human eye is not affected.
  • the distance period (Pitch) of the liquid crystal grating layer 20 is different from the pixel distance period (Pitch) of the display layer 10, and the display layer 10 can be calculated according to the size and resolution of different display layers 10 (screens of the display device). The distance period, the reference thickness of the liquid crystal grating layer 20 and the display layer 10, and the viewing distance are calculated, and the distance period of the liquid crystal grating layer 20 is calculated.
  • the anti-spy display device proposed by the present invention can satisfy the anti-spy function and the shared display switching in one direction, and the direction perpendicular thereto is normally the shared display mode.
  • the anti-peep sharing switchable angle is switchable in the horizontal direction and the shared display mode in the vertical direction.
  • the main anti-spy direction of various display products is usually a single direction (horizontal direction or vertical direction), so the above structure design can meet the use requirements of the user's anti-peep sharing switching.
  • the liquid crystal grating layer 20 further includes an electrode, which may preferably be a transparent electrode to avoid blocking light transmitted through the liquid crystal grating layer 20.
  • the electrode is disposed in the liquid crystal layer of the liquid crystal grating layer 20 and connected to an external circuit via a peripheral trace.
  • the present invention is capable of controlling a plurality of gratings of the liquid crystal grating layer 20 to be switched between black and white by applying a voltage signal on the liquid crystal layer by electrodes.
  • the driving voltage signal applied to the electrodes is a 0V signal and a Vop signal, and the signal configuration is relatively simple.
  • each of the gratings of the liquid crystal grating layer 20 changes from black to white at the same time, and simultaneously changes from white to black, that is, the grating black strips are simultaneously turned on or simultaneously turned off, thereby eliminating the need for timing of the liquid crystal grating layer 20. Control, only one peripheral trace can complete the control of the liquid crystal grating layer 20.
  • the anti-spy display device further includes a backlight layer for the liquid crystal grating layer 20 to be disposed between the display layer 10 and the backlight layer.
  • the backlight layer may not be provided according to different types and functional requirements of the display device, and is not limited thereto.
  • the implementation of the liquid crystal grating layer 20 may preferably adopt a TN type liquid crystal deflection mode. Accordingly, the liquid crystal grating layer 20 is in the normally white mode without power supply, and it can be considered that it does not work.
  • the anti-spyness display device can be considered as a structure in which the backlight layer and the display layer 10 are attached, and the conventional display device structure. It is roughly the same and does not affect the viewing angle and viewing effect.
  • the liquid crystal of a portion of the region is deflected, and the macroscopic representation is that the corresponding region becomes black, and a black strip of the grating appears to block the backlight.
  • the backlight is emitted in a specific area, and then occluded by the light shielding film of the display layer 10, so that the light is emitted at a specific angle in a specific area, and finally visible within a certain range, thereby realizing the anti-spy display.
  • the anti-spy display device of the present invention operates in the anti-spy operation mode, and the liquid crystal grating layer 20 works, and the viewing angle corresponding to the visible area and the anti-peep area D2 can be calculated at the viewing distance. angle. As shown in FIG.
  • the first visible area D1 can be satisfied to be in a range between -30° and 30°
  • the anti-peep area D2 is in a range between 30° and 70°
  • the range of the second visible area D3 greater than 70° is still visible, but the brightness of the area is low, the viewing effect is poor
  • the backlight film can be designed to make the backlight emission angle within 70°, so that the full angle anti-spy can be satisfied.
  • the above-described angle range of the visible area and the anti-peep area D2 is only the range of angles required in the present embodiment, and in other exemplary embodiments of the present invention, the liquid crystal grating layer 20 and the display layer are passed.
  • the aperture ratio of 10 is adjusted, or by adjusting the placement height between the liquid crystal grating layer 20 and the display layer 10, and combining the viewing distance and the like, different anti-peep angles and viewing angles can be obtained to satisfy different anti-peeping Display and share the requirements of the display.
  • the present invention also proposes a peep prevention display method.
  • An exemplary embodiment of the anti-spy display method proposed by the present invention will be described below.
  • the anti-spy display method proposed by the present invention is described by taking an LCD display device as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other modifications are made to the specific embodiments described below in order to adapt the design of the anti-spy display method to other types of display devices. Variations, these variations are still within the scope of the principles of the anti-spy display method proposed by the present invention.
  • the anti-spy display method proposed by the present invention mainly includes the following steps:
  • a liquid crystal grating layer is disposed, which comprises two glass substrates disposed opposite to each other and a liquid crystal layer sandwiched between the two glass substrates, and the resolution of the liquid crystal grating layer is the same as the resolution of the display layer;
  • the above steps representatively describe the structural design and anti-peep imaging design of the anti-spy display method proposed by the present invention.
  • different requirements for the anti-spy function of the display device may be required.
  • the combination of one or more of the following steps is flexibly selected, and the anti-spy display method is constructed in combination with the above steps, and is not limited thereto.
  • the step of disposing the liquid crystal grating layer may further include: designing conversion between black and white of the plurality of gratings of the liquid crystal grating layer to be simultaneously turned on or simultaneously turned off. That is, the plurality of gratings of the liquid crystal grating layer are simultaneously converted from black to white, and simultaneously converted from white to black. Based on the above design, no additional timing control is required, and only one peripheral trace on the display device can complete the control of multiple gratings of the grating layer.
  • the step of disposing the liquid crystal grating layer may further include: designing the resolution of the liquid crystal grating layer to be the same as the display layer.
  • the step of disposing the liquid crystal grating layer may further include designing the aperture ratio of the liquid crystal grating layer to be the same as the display layer.
  • the step of providing the liquid crystal grating layer may further include: designing the opening positions of the grating openings of the liquid crystal grating layer to correspond one-to-one with the opening positions of the openings of the display layer.
  • the step of disposing the liquid crystal grating layer may further include: calculating the pixel pitch (ie, the distance period) of the display layer according to the size and resolution of the display layer (which may also be understood as the screen of the display device).
  • the pixel pitch of the liquid crystal grating layer is matched and calculated.
  • the anti-spy sharing can be switched at an angle of It can be switched in the horizontal direction and always in the vertical direction.
  • the main anti-spying direction of various display products is also a single direction (horizontal direction or vertical direction), so the design fully meets the user's anti-peep display requirements.
  • the step of disposing the liquid crystal grating layer may further include: forming a liquid crystal layer of the liquid crystal grating layer by using a TN type liquid crystal deflection method. Based on the above steps, the liquid crystal layer is in the normally white mode when no power is applied, and the grating can be considered as not working. At this time, the display device can be regarded as an approximate bonding structure composed of the backlight layer and the display layer, and the conventional display device. There is no significant difference in structure, which does not affect the viewing angle and viewing effect.
  • the liquid crystal of a portion of the liquid crystal layer is deflected, and the macroscopic representation is that the area corresponding to each grating changes from white to black, and a black strip of the grating appears to block the backlight, so that the backlight is emitted in a specific area.
  • the BM occlusion of the display layer causes the light to exit at a specific angle in a specific area, and finally is visible within a certain range, thereby realizing the anti-spy display.
  • the step of disposing the liquid crystal grating layer may further include: disposing an electrode in the liquid crystal layer, and connecting the electrode to the external circuit via the peripheral trace. Accordingly, the control signal can be conducted from the external circuit to the electrode via the peripheral trace in the form of a voltage signal and applied to the liquid crystal layer, thereby controlling the conversion of the plurality of gratings of the liquid crystal grating layer between black and white.
  • the step of disposing the liquid crystal grating layer on the display layer may further include: when the display layer is an LCD layer, disposing the liquid crystal grating layer on a side of the LCD layer opposite to a backlight layer. That is, when the display device is an LCD display, since it has an LCD layer and a backlight layer, and the LCD layer does not emit light by itself, the liquid crystal grating layer is disposed between the LCD layer and the backlight layer.
  • the liquid crystal grating layer is disposed on one side of the light-emitting direction of the display layer, that is, the side facing the human eye.
  • the step of disposing the liquid crystal grating layer on the display layer may further include: bonding the liquid crystal grating layer to the entire surface of the display layer by using a transparent adhesive material (for example, glass glue).
  • a transparent adhesive material for example, glass glue
  • the step of disposing the liquid crystal grating layer on the display layer may further include: matching the liquid crystal grating layer and the display layer according to the pixel size, the aperture ratio, and the opening position of the liquid crystal grating layer and the display layer. The spacing between them is calculated and configured. Wherein, the spacing between the liquid crystal grating layer and the display layer can be achieved by adjusting the thickness of the bonding material between the two.
  • the present invention provides an anti-spy display device and a peep-proof display method, which can realize display by providing a liquid crystal grating layer on one side of the display layer, that is, adding only one device structure of the liquid crystal grating layer in the existing structure.
  • the anti-spy function of the device enables the display device to switch between the anti-spy display mode and the shared display mode, and the device has a simple structure, a thin thickness, and a low cost increase.

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Abstract

一种防窥显示装置及防窥显示方法，防窥显示装置包括显示层(10)以及液晶光栅层(20)；液晶光栅层(20)设于显示层(10)一侧，液晶光栅层(20)的分辨率与显示层(10)的分辨率相同，液晶光栅层(20)包括两层玻璃基板以及液晶层；两层玻璃基板间隔相对设置；液晶层夹设于两层玻璃基板之间；通过调节液晶层，能够控制液晶光栅层(20)的多条光栅在黑色和白色之间转换，从而控制防窥显示装置在防窥显示模式与共享显示模式之间转换。防窥显示装置利用在显示层(10)一侧设置液晶光栅层(20)，即在现有结构上仅增加液晶光栅层(20)一个器件结构，即可实现显示装置的防窥功能，从而实现显示装置在防窥显示模式与共享显示模式之间转换，且装置结构简单，厚度较薄，成本增加较少。

Description

防窥显示装置及防窥显示方法 技术领域
本发明涉及防窥显示技术领域，具体而言，涉及一种防窥显示装置及防窥显示方法。
背景技术
液晶显示技术已经成为市场主流显示技术，在像素分辨率，响应时间，屏幕尺寸等等多个显示技术方面已经能够满足用户的需求，但是在一些特殊的显示环境下，用户需要特殊的显示模式以满足特定的需求，例如在办公环境中或者其它私密环境中，用户需要屏幕仅供自己可见，他人不可见，这就是防窥显示模式；在一些情况下又需要与多人共享这个显示系统，这就是共享显示模式。
现有防窥显示技术主要通过增加特殊防窥膜材实现，其只能实现防窥显示功能而无法实现防窥显示与共享显示的切换。为实现防窥显示与共享显示的切换，现有防窥显示装置在上述设计基础上增加其它结构，以实现防窥显示与共享显示的切换显示，然而导致器件厚度过厚，造价过高等问题。
发明内容
本发明所要解决的一个技术问题是如何提供一种器件厚度较薄且造价较低的防窥显示装置。
本发明所要解决的另一个技术问题是如何提供一种防窥显示方法。
本发明的额外方面和优点将部分地在下面的描述中阐述，并且部分地将从描述中变得显然，或者可以通过本发明的实践而习得。
为实现上述目的，本发明采用如下技术方案：
根据本发明的一个方面，提供一种防窥显示装置，其中，所述防窥显示装置包括显示层以及液晶光栅层；所述液晶光栅层设于所述显示层一侧，所述液晶光栅层的分辨率与所述显示层的分辨率相同，所述液晶光栅层包括两层玻璃基板以及液晶层；两层所述玻璃基板间隔相对设置；所述液晶层夹设于两层所述玻璃基板之间；其中，通过调节所述液晶层，能够控制所述液晶光栅层的多条光栅在黑色和白色之间转换，从而控制所述防窥显示装置在防窥显示模式与共享显示模式之间转换。
根据本发明的其中一个实施方式，所述显示层为LCD层，所述防窥显示装置还包括 背光层；所述液晶光栅层设于所述LCD层与所述背光层之间。
根据本发明的其中一个实施方式，所述显示层为自发光显示层，所述液晶光栅层设于所述自发光显示层的出光方向一侧。
根据本发明的其中一个实施方式，所述显示层的开口率与所述液晶光栅层的开口率相同。
根据本发明的其中一个实施方式，所述显示层的各开口位置与所述液晶光栅层各开口位置一一对应。
根据本发明的其中一个实施方式，所述显示层与所述液晶光栅层之间通过玻璃胶整面贴合。
根据本发明的其中一个实施方式，所述液晶光栅层的所述液晶层采用TN型液晶偏转方式。
根据本发明的其中一个实施方式，所述液晶光栅层还包括电极；所述电极设于所述液晶层中，并经外围走线连接于外部电路；其中，通过所述电极在所述液晶层上施加电压信号，从而控制所述液晶光栅层的多条所述光栅在黑色和白色之间转换。
根据本发明的其中一个实施方式，所述液晶光栅层的各所述光栅同时由黑色变为白色，且同时由白色变为黑色。
根据本发明的另一个方面，提供一种防窥显示方法，用于对一显示装置提供一防窥功能，其中，所述防窥显示方法包括以下步骤：
设置一液晶光栅层，其包括间隔相对设置的两层玻璃基板以及夹设于两层所述玻璃基板之间的液晶层，且所述液晶光栅层的分辨率与所述显示层的分辨率相同；
将所述液晶光栅层配置于所述显示装置的显示层的一侧；
调节所述液晶层而控制所述液晶光栅层的多条光栅在黑色和白色之间转换，以在所述显示装置的可视区域内可调节地形成防窥区，从而控制所述显示装置在防窥显示模式与共享显示模式之间转换。
由上述技术方案可知，本发明的有益效果是：
本发明提出一种防窥显示装置及防窥显示方法，利用在显示层一侧设置液晶光栅层，即在现有结构上仅增加液晶光栅层一个器件结构，即可实现显示装置的防窥功能，从而实现显示装置在防窥显示模式与共享显示模式之间转换，且装置结构简单，厚度较薄，成本增加较少。
本发明中通过以下参照附图对优选实施例的说明，本发明的上述以及其它目的、特征 和优点将更加明显。
附图说明
图1是根据一示例性实施方式示出的一种防窥显示装置的光学示意图。
其中，附图标记说明如下：
10.显示层；20.液晶光栅层；3-1.红色亚像素开口区；3-2.绿色亚像素开口区；3-3.蓝色亚像素开口区；D1.第一可视区；D2.防窥区；D3.第二可视区。
具体实施方式
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的实施方式；相反，提供这些实施方式使得本发明将全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。图中相同的附图标记表示相同或类似的结构，因而将省略它们的详细描述。
防窥显示装置实施方式
参阅图1，图1中代表性地示出了能够体现本发明的原理的防窥显示装置。在该示例性实施方式中，本发明提出的防窥显示装置是以LCD显示装置为例进行说明的。本领域技术人员容易理解的是，为将该防窥显示装置的设计思路适配于其他类型的显示装置，而对下述的具体实施方式做出多种改型、添加、替代、删除或其他变化，这些变化仍在本发明提出的防窥显示装置的原理的范围内。
如图1所示，在本实施方式中，本发明提出的防窥显示装置主要包括显示层10、液晶光栅层20以及背光层。需要说明的是，如图1所示，其简要示出了本发明各主要结构的层叠关系及光路。其中，液晶光栅层20上的开口分别表示显示装置的红色亚像素开口区3-1、绿色亚像素开口区3-2和蓝色亚像素开口区3-3，即作为亚像素彩膜的表述。以下结合上述附图，对本发明提出的防窥显示装置的各主要组成部分进行详细说明。
如图1所示，在本实施方式中，液晶光栅层20设于显示层10一侧，显示层为LCD层。具体而言，液晶光栅层20包括两层玻璃基板以及液晶层。两层玻璃基板间隔相对设置，液晶层夹设在这两层玻璃基板之间。基于上述结构设计，通过调节液晶层，能够控制液晶光栅层20的多条光栅在黑色和白色之间转换，从而控制防窥显示装置的防窥功能，即控制防窥显示装置在防窥显示模式和共享显示模式之间转换。另外，在其他实施方式中显示层亦可为自发光显示层，例如OLED层等，液晶光栅层20可设于自发光显示层的一 侧(例如自发光显示层的出光方向的一侧，即朝向人眼的一侧)，则本发明提出的防窥显示装置是适配于自发光显示装置，例如OLED显示装置，在此不予赘述。
较佳地，如图1所示，在本实施方式中，为了保证可视区(第一可视区D1和第二可视区D3)关于屏幕中心对称分布，显示层10上的开口的开口率与液晶光栅层20上的光栅开口的开口率相同。再者，显示层10的的上述各开口的开口位置与液晶光栅层20上述各光栅开口的开口位置一一对应。在本发明的其他实施方式中，显示层10的开口与液晶光栅层20的光栅开口的开口率和开口位置并不限于上述设计，可根据对可视区的实际需求灵活调整。
较佳地，在本实施方式中，显示层10与液晶光栅层20之间通过玻璃胶整面贴合。在本发明的其他示例性实施方式中，显示层10与液晶光栅层20亦可通过其他材料或方式结合。另外，液晶光栅层20与显示层10之间的距离与上述两者的像素大小、开口率等参数相匹配，可以通过调整玻璃胶的厚度对液晶光栅层20与显示层10之间的距离进行调节。
在本实施方式中，液晶光栅层20的分辨率与显示层10的分辨率相同，且在防窥显示模式下并无分辨率损失，不影响人眼的观看效果。并且，液晶光栅层20的距离周期(Pitch)与显示层10的像素距离周期(Pitch)不相同，可根据不同的显示层10(显示装置的屏幕)的尺寸和分辨率计算出显示层10的距离周期长度，再参考液晶光栅层20与显示层10的贴合厚度以及观看距离，计算得到液晶光栅层20的距离周期。在防窥显示模式下，本发明提出的防窥显示装置能够满足一个方向上的防窥功能与共享显示切换，与其垂直的方向常态地为共享显示模式。例如，对于显示器产品，其防窥共享可切换角度为水平方向上可切换，在竖直方向上常态地为共享显示模式。在实际生活中，各种显示产品主要的防窥方向通常为单一方向(水平方向或者竖直方向)，因此上述结构设计能够满足使用者的防窥共享切换的使用需求。
在本实施方式中，液晶光栅层20还包括电极，该电极可优选为透明电极，以避免遮挡透过液晶光栅层20的光线。其中，电极设置在液晶光栅层20的液晶层中，并经外围走线连接于外部电路。本发明能够通过电极在液晶层上施加电压信号，从而控制液晶光栅层20的多条光栅在黑色和白色之间转换。另外，由于液晶光栅层20只需黑白两种状态，因此对电极施加的驱动电压信号为0V信号与Vop信号，信号构成相对简单。优选地，在本实施方式中，液晶光栅层20的各光栅同时由黑色变为白色，且同时由白色变为黑色，即光栅黑条同时开启或者同时关闭，据此，液晶光栅层20无需时序控制，只需一条外围走线即可完成对液晶光栅层20的控制。
如图1所示，在本实施方式中，防窥显示装置还包括背光层，以供液晶光栅层20设置在显示层10与背光层之间。在其他实施方式中，根据显示装置的不同类型和功能需求，亦可不设置该背光层，并不以此为限。
进一步地，在本实施方式中，液晶光栅层20的实现方式可以优选地采用TN型液晶偏转方式。据此，液晶光栅层20在不加电的情况下为常白模式，可以认为其不工作，此时防窥显示装置可以认为是背光层与显示层10贴合的结构，与传统显示器件结构大致相同，不影响观看角度与观看效果。当经由外围走线、电极向液晶光栅层20的液晶层施加电压信号时，其中部分区域的液晶发生偏转，宏观表现为对应区域变成黑色，出现光栅黑条，起到遮挡背光的作用，使得背光在特定区域发出，再经过显示层10的遮光膜的遮挡，使得光线在特定区域沿着特定角度出射，最终在一定范围内可见，实现防窥显示。
基于上述设计，本发明提出的防窥显示装置在防窥工作模式下，液晶光栅层20工作，且可以在观看距离处，计算得到可视区对应的可视角度以及防窥区D2的防窥角度。如图1所示，在本实施方式中，通过设计可以满足第一可视区D1为-30°至30°之间的范围，防窥区D2在30°到70°之间的范围，且大于70°的第二可视区D3的范围仍然可见，但此区域光亮度较低观看效果差，而且可以通过背光膜材设计使得背光出射角度在70°以内，这样即可满足全角度防窥的要求。应当理解的是，上述的可视区和防窥区D2的角度范围仅为本实施方式中所需要的角度范围，在本发明的其他示例性实施方式中，通过对液晶光栅层20和显示层10的开口率进行调整，或通过对液晶光栅层20与显示层10之间的放置高度进行调整，并结合观看距离等因素，可以得到不同的防窥角度与可视角度，满足不同的防窥显示和共享显示的需求。
防窥显示方法实施方式
结合上述对防窥显示装置的说明，本发明还提出一种防窥显示方法。以下对本发明提出的防窥显示方法的一示例性实施方式进行说明。在该示例性实施方式中，本发明提出的防窥显示方法是以LCD显示装置为例进行说明的。本领域技术人员容易理解的是，为将该防窥显示方法的设计思路适配于其他类型的显示装置，而对下述的具体实施方式做出多种改型、添加、替代、删除或其他变化，这些变化仍在本发明提出的防窥显示方法的原理的范围内。
在本实施方式中，本发明提出的防窥显示方法主要包括以下步骤：
设置一液晶光栅层，其包括间隔相对设置的两层玻璃基板以及夹设于两层玻璃基板之间的液晶层，且液晶光栅层的分辨率与显示层的分辨率相同；
将液晶光栅层配置于显示装置的显示层的一侧；
调节液晶层而控制液晶光栅层的多条光栅在黑色和白色之间转换，以在显示装置的可视区域内可调节地形成防窥区，从而控制所述显示装置在防窥显示模式与共享显示模式之间转换。
需要说明的是，上述步骤代表性地说明书了本发明提出的防窥显示方法的结构设计和防窥成像设计，在上述概括的设计步骤之外，可根据对显示装置的防窥功能的不同需求，灵活选择下列各步骤的其中之一或多个的组合，而结合上述步骤构成该防窥显示方法，并不以此为限。
其中，在本实施方式中，设置液晶光栅层的步骤还可包括：将液晶光栅层的多条光栅的黑色和白色之间的转换设计为同时开启或同时关闭。即，液晶光栅层的多条光栅同时由黑色转换为白色，且同时由白色转换为黑色。基于上述设计，无需额外增加时序控制，只需在显示装置上设置一条外围走线即可完成对光栅层的多条光栅的控制。
进一步地，在本实施方式中，设置液晶光栅层的步骤还可包括：将液晶光栅层的分辨率设计为与显示层相同。
进一步地，在本实施方式中，设置液晶光栅层的步骤还可包括：将液晶光栅层的开口率设计为与显示层相同。
进一步地，在本实施方式中，设置液晶光栅层的步骤还可包括：将液晶光栅层的各光栅开口的开口位置设计为与显示层的各开口的开口位置一一对应。
再者，在本实施方式中，设置液晶光栅层的步骤还可包括：根据显示层(亦可理解为显示装置的屏幕)的尺寸和分辨率计算得出显示层的像素间距(即距离周期)，据此结合液晶光栅层与显示层的贴合厚度和显示装置的观看距离(即显示层与人眼的距离)，相匹配地对液晶光栅层的像素间距进行计算和配置。通过该设计方法，在防窥显示模式下，显示装置只能满足一个方向上的防窥与共享切换，与其垂直的方向永远为共享显示模式，例如对于显示器产品，其防窥共享可切换角度为水平方向上可切换，在竖直方向上永远为共享显示模式。而在实际生活中，各种显示产品主要的防窥方向也是单一方向(水平方向或者竖直方向)，因此该设计完全满足用户的防窥显示需求。
进一步地，在本实施方式中，设置液晶光栅层的步骤还可包括：采用TN型液晶偏转方式制成液晶光栅层的液晶层。基于上述步骤，在不加电情况下，液晶层为常白模式，可以认为其光栅不工作，此时显示装置可以认为是背光层与显示层组成的近似的贴合结构，与传统显示器件的结构没有明显差异，不影响观看角度与观看效果。当施加电压信号时， 液晶层的部分区域的液晶发生偏转，宏观表现为对应各光栅的区域由白色变为黑色，出现光栅黑条，起到遮挡背光的作用，使得背光在特定区域发出，经过显示层的BM遮挡，使得光线在特定区域沿着特定角度出射，最终在一定范围内可见，实现防窥显示。
进一步地，在本实施方式中，设置液晶光栅层的步骤还可包括：在液晶层中设置电极，并将电极经外围走线连接于外部电路。据此，控制信号可以电压信号的形式由外部电路经外围走线传导至电极并施加在液晶层上，从而控制液晶光栅层的多条光栅在黑色和白色之间的转换。
进一步地，在本实施方式中，将液晶光栅层配置于显示层的步骤还可包括：当显示层为LCD层时，是将液晶光栅层配置在LCD层的相对于一背光层的一侧。即，当显示装置为LCD显示器时，由于其具有LCD层和背光层，且LCD层不自主发光，故将液晶光栅层配置在LCD层与背光层之间。对应地，在其他实施方式中，当显示器为其他类型时，即显示层为自发光的类型时，是将液晶光栅层配置在显示层的出光方向的一侧，即朝向人眼的一侧。
进一步地，在本实施方式中，将液晶光栅层配置于显示层的步骤还可包括：利用透明粘合材料(例如玻璃胶)将液晶光栅层与显示层整面贴合固定。
进一步地，在本实施方式中，将液晶光栅层配置于显示层的步骤还可包括：根据液晶光栅层和显示层的像素大小、开口率和开口位置，相匹配地对液晶光栅层与显示层之间的间距进行计算和配置。其中，液晶光栅层与显示层之间的间距可以通过调整两者之间的粘合材料的厚度实现。
综上所述，本发明提出一种防窥显示装置及防窥显示方法，利用在显示层一侧设置液晶光栅层，即在现有结构上仅增加液晶光栅层一个器件结构，即可实现显示装置的防窥功能，从而实现显示装置在防窥显示模式与共享显示模式之间转换，且装置结构简单，厚度较薄，成本增加较少。
虽然已参照几个典型实施例描述了本发明，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本发明能够以多种形式具体实施而不脱离发明的精神或实质，所以应当理解，上述实施例不限于任何前述的细节，而应在随附权利要求所限定的精神和范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。

Claims (10)

  1. 一种防窥显示装置，其特征在于：
    所述防窥显示装置包括显示层以及液晶光栅层；
    所述液晶光栅层设于所述显示层一侧；
    所述液晶光栅层的分辨率与所述显示层的分辨率相同；
    所述液晶光栅层包括两层玻璃基板以及液晶层；
    两层所述玻璃基板间隔相对设置；
    所述液晶层夹设于两层所述玻璃基板之间；
    其中，通过调节所述液晶层，能够控制所述液晶光栅层的多条光栅在黑色和白色之间转换，从而控制所述防窥显示装置在防窥显示模式与共享显示模式之间转换。
  2. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述显示层为LCD层；
    所述防窥显示装置还包括背光层；
    所述液晶光栅层设于所述LCD层与所述背光层之间。
  3. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述显示层为自发光显示层；
    所述液晶光栅层设于所述自发光显示层的出光方向一侧。
  4. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述显示层的开口率与所述液晶光栅层的开口率相同。
  5. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述显示层的各开口位置与所述液晶光栅层各开口位置一一对应。
  6. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述显示层与所述液晶光栅层之间通过玻璃胶整面贴合。
  7. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述液晶光栅层的所述液晶层采用TN型液晶偏转方式。
  8. 根据权利要求1所述的防窥显示装置，其特征在于，
    所述液晶光栅层还包括电极；
    所述电极设于所述液晶层中，并经外围走线连接于外部电路；
    其中，通过所述电极在所述液晶层上施加电压信号，从而控制所述液晶光栅层的多条所述光栅在黑色和白色之间转换。
  9. 根据权利要求8所述的防窥显示装置，其特征在于，
    所述液晶光栅层的各所述光栅同时由黑色变为白色；
    所述液晶光栅层的各所述光栅同时由白色变为黑色。
  10. 一种防窥显示方法，用于对一显示装置提供一防窥功能，其特征在于，所述防窥显示方法包括以下步骤：
    设置一液晶光栅层，其包括间隔相对设置的两层玻璃基板以及夹设于两层所述玻璃基板之间的液晶层，且所述液晶光栅层的分辨率与所述显示层的分辨率相同；
    将所述液晶光栅层配置于所述显示装置的显示层的一侧；
    调节所述液晶层而控制所述液晶光栅层的多条光栅在黑色和白色之间转换，以在所述显示装置的可视区域内可调节地形成防窥区，从而控制所述显示装置在防窥显示模式与共享显示模式之间转换。
PCT/CN2018/078182 2017-03-07 2018-03-06 防窥显示装置及防窥显示方法 WO2018161904A1 (zh)

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