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 PDFInfo
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- 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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- 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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- 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
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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
- G02F1/133504—Diffusing, scattering, diffracting elements
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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
- G02F1/13356—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
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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
- G02F1/1336—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
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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
- 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
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- 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
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- 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
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- 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
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- 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
Description
Claims (10)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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CN107274784B (zh) * | 2017-06-13 | 2019-08-20 | 维沃移动通信有限公司 | 一种显示屏组件及移动终端 |
CN110412809A (zh) * | 2019-08-01 | 2019-11-05 | 京东方科技集团股份有限公司 | 一种防窥器件、显示装置和防窥方法 |
CN110568641B (zh) * | 2019-09-25 | 2022-02-22 | 京东方科技集团股份有限公司 | 一种防窥显示装置及其防窥方向调节方法 |
CN110646945B (zh) * | 2019-09-29 | 2021-11-12 | 京东方科技集团股份有限公司 | 显示装置及显示方法 |
CN112748611B (zh) * | 2021-01-19 | 2023-07-07 | 北京京东方显示技术有限公司 | 一种显示组件及电子设备 |
CN113885235B (zh) * | 2021-10-09 | 2023-07-25 | 武汉华星光电半导体显示技术有限公司 | 显示装置及显示方法 |
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