WO2019201158A1 - 显示装置、其驱动方法及显示系统 - Google Patents

显示装置、其驱动方法及显示系统 Download PDF

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Publication number
WO2019201158A1
WO2019201158A1 PCT/CN2019/082324 CN2019082324W WO2019201158A1 WO 2019201158 A1 WO2019201158 A1 WO 2019201158A1 CN 2019082324 W CN2019082324 W CN 2019082324W WO 2019201158 A1 WO2019201158 A1 WO 2019201158A1
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WIPO (PCT)
Prior art keywords
area
phase retarder
spy
display
phase
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Application number
PCT/CN2019/082324
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English (en)
French (fr)
Inventor
马新利
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/638,285 priority Critical patent/US11232766B2/en
Publication of WO2019201158A1 publication Critical patent/WO2019201158A1/zh

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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
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133631—Birefringent elements, e.g. for optical compensation with a spatial distribution of the retardation value
    • 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
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • 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
    • G09G2320/0613—The adjustment depending on the type of the information to be displayed
    • 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
    • G09G2320/0686—Adjustment of display parameters with two or more screen areas displaying information with different brightness or colours
    • 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
    • G09G2320/08—Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
    • 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 disclosure relates to a display device, a driving method of the display device, and a display system.
  • a device including a display screen such as a computer, a mobile phone, an automatic teller machine, an automatic ticket machine, etc., which may cause leakage of personal information.
  • At least one embodiment of the present disclosure provides a display device including a display panel, a polarizer on a side of the light exit surface of the display panel, and a phase retarder on a side of the light exit surface of the polarizer.
  • the display area of the display panel includes a privacy-preventing area and a compensation area;
  • the phase retarder includes: a first phase retarder corresponding to the anti-spy area and a second phase retarder corresponding to the compensation area;
  • the first phase retarder and the second phase retarder are each a quarter-wave phase retarder; the first phase retarder and the second phase retarder are configured to be incident on the operation
  • the light of the first phase retarder and the light incident to the second phase retarder are respectively converted into polarized light of opposite rotation.
  • the first phase retarder and the second phase retarder are configured to, when in operation, illuminate the light incident on the first phase retarder and incident on the The light of the second phase retarder is converted into left-handed polarized light and right-handed polarized light, respectively; or the first phase retarder and the second phase retarder are configured to be incident on the first in operation The light of the phase retarder and the light incident to the second phase retarder are converted into right-handed polarized light and left-handed polarized light, respectively.
  • the first phase retarder and the second phase retarder have complementary phase delay characteristics.
  • an absolute value of a phase delay value caused by the first phase retarder and an absolute value of a phase delay value caused by the second phase retarder are both equal to ⁇ /2.
  • an angle between a fast axis direction of the first phase retarder and a fast axis direction of the second phase retarder is 90°.
  • the polarizer is configured to convert light emitted by the display panel onto the polarizer into linearly polarized light during operation; the polarizer is transparent An angle between an optical axis and an optical axis of the first phase retarder and an angle between a transmission axis of the polarizer and an optical axis of the second phase retarder are both 45°, the first phase delay Both the patch and the second phase retarder are configured to convert the linearly polarized light into circularly polarized light during operation.
  • the screen displayed by the anti-spy area in the anti-spy display mode, is a peep-preventing picture, and the picture displayed by the compensation area and the picture displayed by the anti-peep area
  • the superimposed screen is an interference screen; and in the normal display mode, the superimposed screen of the screen displayed by the anti-spy area and the screen displayed by the compensation area is a normal display screen.
  • the display device further includes a controller.
  • the controller is configured to cause the superimposed screen of the screen displayed by the compensation area and the screen displayed by the anti-spy area to be a white screen or a predetermined screen in the anti-spy display mode.
  • the display device further includes a controller.
  • the controller is configured to, in the anti-spy display mode, cause an average value of brightness of a screen displayed by the compensation area to be greater than a maximum value of a brightness average value of a picture displayed by the anti-peep area.
  • the controller is further configured to, in the anti-spy display mode, cause an average value of a brightness of a screen displayed by the compensation area to be displayed with the anti-spy area
  • the ratio of the maximum value of the brightness average of the picture is about 3-16.
  • the display panel includes a plurality of pixels arranged in an array; and the anti-peep area includes at least one of the pixels, and the compensation area includes at least one of the pixels .
  • the display panel includes a plurality of the anti-spy region and a plurality of the compensation regions; and a plurality of the anti-spy regions and a plurality of the compensation regions are in a row Alternately arranged in at least one of the direction and the column direction.
  • the plurality of anti-spy areas include odd-numbered rows of pixels, and the plurality of compensation regions include even-numbered rows of pixels; or, the plurality of anti-spys The region includes the pixels of the even rows, the plurality of compensation regions include the pixels of the odd rows; or, the plurality of the anti-peep regions include the pixels of the odd columns, and the plurality of the compensation regions include the even columns
  • the pixel; or, the plurality of anti-spy areas include the pixels of an even column, the plurality of compensation regions including the pixels of an odd column; or each of the compensation regions includes two rows of the pixels,
  • Each of the privacy regions includes a row of the pixels; or each of the compensation regions includes two columns of the pixels, each of the privacy regions including a column of the pixels.
  • the area of the compensation area is larger than the area of the anti-spy area.
  • an orthographic projection of the first phase retarder on the display panel overlaps with the anti-peep area; and the second phase retarder is on the display panel
  • the upper orthographic projection overlaps the compensation area
  • At least one embodiment of the present disclosure also provides a display system including: anti-spy glasses and a display device provided by any of the embodiments of the present disclosure.
  • the anti-spyglass includes a lens configured to transmit light emitted from the first phase retarder and block light emitted from the second phase retarder.
  • the lens includes a phase retardation film and a polarizing layer; the lens includes a light incident side, the phase retardation film being closer to the input than the polarizing layer a light side; the phase retardation film is configured to convert, in operation, light rays emitted from the first phase retarder into first linearly polarized light, and convert light rays emitted from the second phase retarder into second linear polarization Light, and causing a polarization direction of the first linearly polarized light to be perpendicular to a polarization direction of the second linearly polarized light; and a polarization direction of the first linearly polarized light being parallel to a transmission axis of the polarizing layer.
  • the phase retardation film has the same phase delay characteristics as the first phase retarder, and the phase retardation film and the second phase retarder have complementary phases a retardation characteristic, a transmission axis of the polarizing layer is perpendicular to a transmission axis of the polarizer; or the phase retardation film and the first phase retarder have complementary phase delay characteristics, the phase retardation film and The second phase retarder has the same phase delay characteristic, and the transmission axis of the polarizing layer is parallel to the transmission axis of the polarizer.
  • the anti-spyglass has a phase retardation film that is the same as the fast axis direction of the first phase retarder.
  • At least one embodiment of the present disclosure also provides a driving method of a display device, including: inputting a privacy-preventing display signal to each pixel in the anti-spy area, and to the compensation area in a privacy-preventing display mode
  • Each of the pixels inputs a compensation display signal such that the screen displayed by the anti-spy area is a peep-preventing picture, and the superimposed picture of the picture displayed by the compensation area and the picture displayed by the anti-peep area is an interference picture;
  • the normal display mode inputting a first display signal to each of the pixels in the anti-peep area, and inputting a second display signal to each of the pixels in the compensation area to display the anti-spy area
  • the superimposed screen of the screen and the screen displayed by the compensation area is a normal display screen.
  • the anti-spy display signal is input to each pixel in the anti-spy region, and to each of the compensation regions
  • Inputting the compensation display signal by the pixel includes: inputting, in the anti-spy display mode, a peep prevention display signal corresponding to the first brightness value to each of the pixels in the anti-peep area, and to the compensation area
  • a peep prevention display signal corresponding to the first brightness value to each of the pixels in the anti-peep area, and to the compensation area
  • Each of the pixels in the input a compensation display signal corresponding to the second brightness value; a second brightness value of each of the pixels in the compensation area and a first brightness of the pixel in the adjacent anti-peep area
  • the sum of the values is a preset value such that the interference picture is a picture under the gray level corresponding to the preset value.
  • the preset value is 300 nit; or / and, the first brightness value is in the range of 50 nit - 100 nit, and the second brightness value is in the range of 350 nit - 800 nit Inside.
  • FIG. 1 is a schematic structural diagram of a display device according to some embodiments of the present disclosure
  • FIG. 2 is a schematic illustration of the direction of the fast axis of the first phase retarder and the second phase retarder in some embodiments of the present disclosure
  • FIG. 3 is a second schematic structural diagram of a display device according to some embodiments of the present disclosure.
  • 4A to 4D are schematic diagrams showing the arrangement of a privacy-preventing area and a compensation area in some embodiments of the present disclosure
  • FIG. 5 is a schematic structural diagram of a display system according to some embodiments of the present disclosure.
  • FIG. 6 is a schematic flowchart of a driving method of a display device according to some embodiments of the present disclosure.
  • a privacy-preventing display device can manually switch between a privacy state and a sharing state using a patch having a gate structure.
  • the inventors of the present disclosure have noticed that the display brightness of the display device is significantly lowered in the anti-spy state, for example, the overall display brightness of the display device is reduced by about 40%. Therefore, although the display device can realize the anti-peep display, the display effect of the normal display is lowered, which degrades the user experience.
  • Embodiments of the present disclosure provide a display device, a driving method of the display device, and a display system.
  • the display device includes a display panel, a polarizer on a light emitting surface side of the display panel, and a phase retarder on a side of the light exit surface of the polarizer .
  • the display area of the display panel includes a privacy area and a compensation area;
  • the phase retarder includes: a first phase retarder corresponding to the anti-spy area and a second phase retarder corresponding to the compensation area;
  • the retardation plates are all quarter-wave phase retarders;
  • the first phase retarder and the second phase retarder are configured to illuminate the light incident on the first phase retarder and the light incident on the second phase retarder during operation Converted to polarized light with opposite rotation in opposite directions.
  • the display device can be used with a privacy eye to achieve an anti-spy function.
  • the thickness and shape of the various film layers in the figures do not reflect true proportions, and are merely intended to illustrate the present disclosure.
  • the display device includes a display panel 10 , a polarizer 11 on a light emitting surface side of the display panel 10 , and a light emitting surface side of the polarizer 11 .
  • Phase retarder 12 e.g., phase retardation layer 12; display area of display panel 10 includes anti-peep area A and compensation area B; phase retarder 12 is a quarter-wave phase retarder (first phase delay described below)
  • the slice 121 and the second phase retarder 122 are both quarter-wave phase retarders;
  • the phase retarder 12 includes: a first phase retarder 121 corresponding to the anti-spy region A and a second phase corresponding to the compensation region B
  • the retardation plate 122; the angle between the fast axis direction of the first phase retarder 121 and the fast axis direction of the second phase retarder 122 is 90°; in the anti-spy display mode, the screen displayed by the anti-peep area A is a peep-proof screen
  • the superimposed screen of the screen displayed by the compensation area B and the screen displayed by the anti-peep area A is an interference screen; in the normal display mode, the superimposed screen of the screen displayed by the anti-spy area A and the screen displayed
  • the anti-spy screen refers to a user of the display device (eg, a user wearing anti-special glasses) that does not want other people (eg, people who are not wearing anti-special glasses) to see and only for the display device
  • the screen displayed by the user eg, the interference screen refers to a screen that can hide the information carried by the anti-peep screen
  • the normal display screen refers to a screen that the user of the display device is willing to share with other people.
  • the display device provided by the embodiments of the present disclosure may be used in combination with anti-spy glasses to achieve anti-spyware performance, the anti-spy glasses configured to transmit light emitted from the first phase retarder and block from the second phase retarder The light that is emitted.
  • the anti-spy area displays the anti-peep picture
  • the superimposed picture of the picture displayed by the compensation area and the anti-spy area display is an interference picture, thereby wearing the anti-spy
  • the user's eyes of the spectacles may receive only the anti-spy screen, whereby the user wearing the anti-spy glasses can view the anti-peep picture; the eyes of the user who is naked-eye (ie, the user who does not wear the anti-spy glasses) simultaneously receive the anti-spy
  • the picture and the compensation picture the picture viewed by the user viewed by the naked eye is the interference picture, thereby achieving the anti-peep effect;
  • the superimposed picture of the picture displayed in the anti-spy area and the picture displayed in the compensation area is the normal display.
  • the picture so that the user can view the normal display screen with the naked eye watching.
  • the anti-spy display function of the display device provided by some embodiments of the present disclosure does not affect the display effect of the normal display, so that some embodiments of the present disclosure provide a display device with better display than the ordinary anti-spy display device. effect.
  • the polarizer 11 is located on the side of the phase retarder 12 close to the display panel 10.
  • the polarizer 11 may be a linear polarizer, and may be configured to convert light incident thereon (for example, naturally polarized light) into linearly polarized light, and the polarization direction of the linearly polarized light is parallel to the transmission axis of the polarizer 11.
  • the polarizer 11 since the polarizer 11 is provided on the light-emitting surface side of the display panel 10, the light (for example, naturally polarized light) emitted from the display panel 10 passes through the polarizer 11 and is converted into linearly polarized light.
  • a phase retarder 12 is disposed on the light-emitting surface side of the polarizer 11, and the phase retarder 12 is a quarter-wave phase retarder (for example, a quarter-wave plate), and the linearly polarized light passes through the phase retarder 12 It is then converted to elliptically polarized or circularly polarized light.
  • the phase retarder 12 includes a first phase retarder 121 and a second phase retarder 122, and the first phase retarder 121 and the second phase retarder 122 are configured to be incident on the first phase retarder 121 and the first The light rays of the two-phase retarder 122 are respectively converted into polarized lights of opposite rotations.
  • the orthographic projection of the first phase retarder 121 on the display panel 10 overlaps with the anti-peep area such that light emitted by the anti-spy zone can exit the display device via the first phase retarder 121; the second phase retarder 122 is displayed
  • the orthographic projection on panel 10 overlaps the compensation region such that light emitted by the compensation region can exit the display device via second phase retarder 122.
  • the orthographic projection of the first phase retarder 121 on the display panel 10 completely overlaps with the anti-peep area
  • the orthographic projection of the second phase retarder 122 on the display panel 10 completely overlaps with the compensation area to enhance the anti-spy performance.
  • first phase retarder 121 and the second phase retarder 122 are configured to convert light rays incident to the first phase retarder 121 and the second phase retarder 122 into left-handed polarized light and right-handed polarized light, respectively.
  • first phase retarder 121 and the second phase retarder 122 are configured to respectively convert the light rays incident to the first phase retarder 121 and the second phase retarder 122 into right-handed polarized light and left-handed polarized light.
  • the left-handed polarized light and the right-handed polarized light may be elliptically polarized light or circularly polarized light.
  • the phase retarder when the polarization direction of the linearly polarized light is 45 degrees from the optical axis of the phase retarder (for example, the first phase retarder 121 or the second phase retarder 122), the phase retarder is configured to be incident to the phase, respectively.
  • the light on the retarder is converted to circularly polarized light.
  • the polarization direction of the linearly polarized light and the optical axis of the phase retarder are greater than zero and less than 90°
  • the phase retarder is configured to be incident respectively.
  • Light on the phase retarder is converted to elliptically polarized light.
  • the first phase retarder 121 and the second phase retarder 122 have complementary phase delay characteristics.
  • the complementary phase retardation characteristics of the first phase retarder 121 and the second phase retarder 122 means that the absolute value of the phase delay value caused by the first phase retarder 121 is equal to the phase caused by the second phase retarder 122.
  • the absolute value of the delay value, and the sum of the phase delay value caused by the first phase retarder 121 and the phase delay value caused by the second phase retarder 122 is equal to zero.
  • phase delay value caused by the phase retarder refers to the ordinary light (o-light) in the light of the phase retarder to the phase retarder.
  • the absolute value of the phase delay value caused by the first phase retarder 121 and the absolute value of the phase delay value caused by the second phase retarder 122 are both equal to ⁇ /2; in this case, the first phase retarder 121 and the first The two-phase retarder 122 is configured to respectively convert light rays incident to the first phase retarder 121 and the second phase retarder 122 into polarized lights of opposite rotational inversion.
  • the first phase retarder 121 and the second phase retarder 122 are configured to respectively convert light rays incident to the first phase retarder 121 and the second phase retarder 122 into left-handed circularly polarized light and right-handed circularly polarized light, respectively.
  • the optical axis of the phase retarder (for example, the first phase retarder 121 or the second phase retarder 122) is parallel to the surface of the phase retarder.
  • the angle between the optical axis of the phase retarder (for example, the first phase retarder 121 or the second phase retarder 122) and the transmission axis of the polarizer 11 is 45 degrees.
  • linearly polarized light is incident perpendicularly to the phase retarder, that is, the direction of transmission of the linearly polarized light is perpendicular to the phase retarder.
  • the first phase retarder 121 is a positive crystal
  • the second phase retarder 122 is a negative crystal
  • the first phase retarder 121 is a negative crystal
  • the second phase retarder 122 is a normal crystal.
  • the direction of the light vector in which the propagation speed is fast in the phase retarder is the fast axis.
  • the phase retarder is a positive crystal
  • the velocity of the ordinary light in the phase retarder is greater than the velocity of the extraordinary light. Therefore, the direction of the light vector of the ordinary light in the phase retarder is the fast axis of the phase retarder.
  • the phase retarder is a negative crystal
  • the velocity of the extraordinary light in the phase retarder is greater than the velocity of the ordinary light, and therefore, the direction of the light vector of the extraordinary light in the phase retarder is the fast axis of the phase retarder.
  • the fast axis of the phase retarder can also be used as a reference.
  • the transmission axis direction of the polarizer 11 is at an angle of 45° with the fast axis direction of the phase retarder, the obtained light is circularly polarized light.
  • the angle of the transmission axis of the polarizer 11 and the direction of the fast axis of the phase retarder are other angles (for example, angles other than zero, 90 degrees, and 45 degrees), elliptically polarized light is obtained.
  • the embodiment of the present disclosure is described by taking the light passing through the phase retarder 12 into circularly polarized light as an example.
  • the transmission axis direction and phase retardation of the polarizing plate 11 in the embodiment of the present disclosure The fast axis (or optical axis) direction of the slice (for example, the first phase retarder 121 or the second phase retarder 122) is 45°, but the embodiment of the present disclosure does not delay the transmission axis and phase of the polarizer.
  • the angle of the fast axis (or optical axis) of the slice is limited.
  • the angle between the fast axis direction of the first phase retarder 121 and the fast axis direction of the second phase retarder 122 is 90°.
  • the angle between the fast axis direction of the first phase retarder 121 and the horizontal direction may be 45°.
  • the angle between the fast axis direction of the second phase retarder 122 and the horizontal direction may be -45 (i.e., the direction shown by S2 in the figure); in this case,
  • the direction of rotation of the circularly polarized light obtained after the one phase retarder 121 and the second phase retarder 122 is different. For example, after the first phase retarder 121 is transmitted, the left circularly polarized light is obtained, and after passing through the second phase retarder 122, What is obtained is right-handed circularly polarized light.
  • the user wears the corresponding anti-peep glasses, for example, only the glasses with left-handed circularly polarized light, the user can only view the screen displayed in the anti-peep area A, and the picture of the compensation area B is not seen, so the anti-spy display is displayed.
  • the anti-spying screen can be displayed by controlling the anti-peep area A, so that the user wearing the corresponding anti-spy glasses can view the anti-peeping picture, and the compensation area B is displayed to display the compensation picture, so that the compensation area B displays the screen and the anti-peep area.
  • the picture displayed by A is an interference picture, so that the picture seen by the user who is viewed by the naked eye is an interference picture, thereby realizing the anti-spy effect.
  • the transmission axis direction of the polarizer and the fast axis direction of the phase retarder can be adjusted according to actual conditions. For example, if the transmission axis of the polarizer has an angle of 45° with the horizontal direction, the first phase retarder The fast axis direction can be set to the horizontal direction, and the fast axis direction of the second phase retarder can be the vertical direction.
  • the direction of the transmission axis of the polarizer and the fast axis direction of the phase retarder are not limited.
  • the anti-spy zone A and the compensation zone B as a whole can realize the display function of the display device.
  • the superimposed screen of the screen displayed by the anti-spy zone A and the screen displayed by the compensating area B may be a normal display screen, so that the user who is viewed by the naked eye can view the normal display screen, and thus the display device provided by some embodiments of the present disclosure
  • the anti-spy display function does not affect the display of the normal display.
  • all the pixels in the display area participate in the display. In this case, the resolution and display effect of the display panel are not affected.
  • the light emitted by the display panel may be transmitted through the polarizer.
  • the light emitted by the display panel may be natural light, elliptically polarized light, circularly polarized light, or not transmitted through the polarizer.
  • the linearly polarized light in the axial direction for example, the display panel may be an Organic Light-Emitting Diode (OLED) display panel, or may be a liquid crystal display (LCD).
  • OLED Organic Light-Emitting Diode
  • LCD liquid crystal display
  • the liquid crystal display panel may be Based on the Twisted (TN) mode, the Advanced Super Dimension (ADS) mode, or the Vertical Aligment (VA) mode, etc., the type of the display panel is not limited herein.
  • the display panel 10 can include a color filter substrate 101 , an array substrate 102 , and between the color filter substrate 101 and the array substrate 102 .
  • the liquid crystal layer 103 is provided with a color filter layer 104 on the color filter substrate 101 (for example, the color filter substrate 101 includes a color filter layer 104).
  • An upper polarizer and a lower polarizer 13 are further disposed on the outer side of the display panel 10.
  • the side of the color filter substrate 101 remote from the array substrate 102 is provided with an upper polarizer, and the side of the array substrate 102 away from the color filter substrate 101 A lower polarizer is provided.
  • the upper polarizer and the polarizer 11 can be implemented as the same polarizer, that is, in the case where the display panel is a liquid crystal display panel, the polarizer 11 can be multiplexed into the upper polarizer of the display panel 10 (ie, The polarizer is located on the light-emitting side of the display panel.
  • the display panel 10 does not need to be provided with an upper polarizer; for example, the upper polarizer and the polarizer 11 can respectively adopt two polarizers whose transmission axis directions are not perpendicular. , here is not limited.
  • the display panel may include a plurality of pixels arranged in an array.
  • each pixel includes a plurality of sub-pixels (eg, a red sub-pixel, a color filter sub-pixel, and a blue sub-pixel).
  • each privacy zone includes at least one pixel (eg, one row or column of display pixels), each display area including at least one pixel (eg, one row or one column of display pixels).
  • the anti-spy area is used to display the anti-peep picture
  • the compensation area is used to display the compensation picture so that the superimposed picture of the picture displayed by the compensation area and the picture displayed by the anti-peep area is an interference picture.
  • the display panel may include a plurality of anti-spy areas and a plurality of compensation areas, and the plurality of anti-spy areas and the plurality of compensation areas are alternately arranged in the row direction and/or the column direction.
  • the phase retarder includes a plurality of first phase retarders and a plurality of second phase retarders, and the plurality of first phase retarders respectively and The anti-peep areas are opposed to each other, and the plurality of second phase retarders are respectively opposed to the plurality of compensation areas.
  • the plurality of first phase retarders and the plurality of second phase retarders are in the row direction and/or the column The directions are alternately arranged.
  • a compensation area may be provided in the vicinity of each anti-peep area to enhance the interference effect of the compensation area on the anti-peep area and/or to facilitate the compensation area and the anti-peep area.
  • the images of the area are superimposed, which improves the interference effect of the interference picture, and prevents the user who is watching the naked eye from viewing the anti-theft picture (the anti-peep picture cannot be clearly seen).
  • the arrangement manner of the plurality of anti-peep areas and the plurality of compensation areas may be any of the arrangement modes shown in FIGS. 4A to 4D.
  • A1, A2, A3, A4, A5, ... represent the anti-peep area
  • B1, B2, B3, B4, B5, ... represent the compensation area
  • numbers 1, 2, 3, ... 10... ... indicates the number of rows of pixels or the number of columns.
  • a plurality of anti-peep areas may correspond to (including) odd-numbered rows of pixels, and multiple compensation areas (such as B1 in FIG. 4A).
  • B2, B3, B4, B5, ...) can correspond to pixels of even rows.
  • a plurality of anti-peep areas may correspond to (including) even-numbered rows of pixels, and multiple compensation areas (such as B1 in FIG. 4B).
  • B2, B3, B4, B5, ...) may correspond to (including) pixels of odd rows.
  • a plurality of anti-peep areas may correspond to (including) odd-numbered columns of pixels, and multiple compensation areas (such as B1 in FIG. 4C).
  • B2, B3, B4, B5, ...) can correspond to (including) even-numbered columns of pixels.
  • a plurality of anti-peep areas may correspond to (including) even-numbered columns of pixels, and multiple compensation areas (such as B1 in FIG. 4D).
  • B2, B3, B4, B5, ...) may correspond to (including) pixels of odd columns.
  • the area occupied by the anti-spy area and the compensation area is the same or only one row or one column of pixels; in this case, for example, the anti-peep area and the compensation area are relatively uniform, and are normal.
  • the display mode is better in the display mode and does not affect the display uniformity of the display panel.
  • the arrangement shown in FIG. 4A to FIG. 4D is only an example.
  • the anti-seeding area and the compensation area may also be arranged in other manners, for example, alternately arranged in the row direction and the column direction. Therefore, the anti-peep area and the compensation area form a checkerboard pattern. In this case, the interference effect of the compensation area can be better, and the arrangement manner of the anti-peep area and the compensation area is not limited herein.
  • the area of the compensation area may be larger than the area of the anti-peep area.
  • the compensation screen is displayed by the compensation area so that the superimposed screen of the screen displayed in the compensation area and the screen displayed in the anti-spy area is an interference screen, so that the screen viewed by the user viewed by the naked eye is an interference screen, thereby avoiding The anti-peep screen is seen by the user who is naked.
  • the area of the compensation area is set to be larger than the area of the anti-peep area, and in the anti-spy display mode, the screen displayed by the compensation area is more capable of interfering with the picture displayed by the anti-spy area, in which case the display device displays The interference capability of the interference picture is stronger, so that the anti-spy performance of the display device is better.
  • the compensation area is used to interfere.
  • the method for realizing the area of the compensation area to be larger than the area of the anti-spy area may be selected according to actual application requirements, which is not specifically limited in the embodiment of the present disclosure.
  • the area of the pixel (single pixel) in the compensation area may be set larger than the area of the pixel in the privacy area.
  • the number of pixels in the compensation area may be equal to or larger than the number of pixels in the privacy area.
  • the number of pixels in the compensation area may be greater than the number of pixels in the anti-peep area.
  • the area of the pixels in the compensation area may be equal to or larger than the area of the pixels in the anti-spy area. Not limited.
  • the compensation area may correspond to two rows of pixels, and the anti-peep area may correspond to one row of pixels.
  • the compensation area may correspond to two columns of pixels, and the anti-peep area may correspond to one column of pixels.
  • the ratio of the number of pixels (or the number of rows, the number of columns) included in the compensation area to the number of pixels (or the number of rows and columns) included in the anti-peep area is not limited to 2:1, and is compensated according to actual application requirements.
  • the ratio of the number of pixels included in the area to the number of pixels included in the privacy area can also be implemented as N:1, and N is a natural number greater than 1.
  • the area of the compensation area may be set to be larger than the area of the privacy area.
  • the compensation area may be set to correspond to (including) two rows of pixels
  • the anti-spy area is set to correspond to (including) one row of pixels
  • the compensation area is set to correspond to (including) two columns of pixels
  • the anti-peep area is set to correspond ( Included in the column of pixels, such that each row (or column) of the corresponding anti-peep area has two rows (or two columns) of pixels corresponding to the compensation area, so that the screen displayed by the compensation area is displayed on the anti-peep area
  • the interference capability of the picture is stronger and/or the compensation picture displayed in the compensation area and the anti-peep picture displayed in the anti-peep area are easily superimposed as interference pictures, thereby improving the interference performance of the interference picture.
  • the display device further includes a drive circuit and a controller for providing a drive signal to the plurality of pixels of the display device such that the plurality of pixels exhibit the desired brightness.
  • the controller is configured to cause a plurality of pixels to exhibit a desired brightness by controlling the drive circuit.
  • the controller is configured to make the brightness of a single pixel of the compensation area larger than the brightness of a single pixel of the anti-peep area in the anti-spy display mode, thereby causing the light emitted by the compensation area to generate a strong light for the light emitted by the anti-spy area Interference, thereby making it difficult for the naked-eye user to clearly see the picture displayed in the anti-peep area.
  • the controller is configured such that the brightness average of the screen displayed by the compensation area is greater than the maximum value of the brightness average of the picture displayed by the privacy area.
  • the ratio of the brightness average value of the screen displayed in the compensation area to the maximum value of the brightness average value of the screen displayed in the privacy area is about 3-16.
  • the maximum value of the luminance average value of the screen displayed in the anti-spy area is in the range of 50 nit - 100 nit, and the average value of the brightness of the screen displayed in the compensation area is in the range of 350 nit - 800 nit.
  • the controller may be configured to make the combined screen of the screen displayed by the compensation area and the screen displayed by the anti-spy area in the anti-spy display mode as a white screen or a predetermined screen (that is, the interference screen is a white screen or a predetermined screen). ), thereby making it difficult for the naked-eye user to view the screen displayed in the anti-peep area.
  • the above-mentioned white screen refers to a screen with uniform brightness (for example, the ratio of the difference between the highest brightness and the lowest brightness of the white picture and the average value of the brightness of the white picture is less than 5%).
  • the predetermined screen refers to a screen that the user of the display device desires to see or preset in the naked eye user (for example, thank you for viewing).
  • the specific setting manner of the controller can be referred to the driving method of the display device, and details are not described herein again.
  • the average value of the brightness of the screen displayed in the compensation area may be larger than the average value of the brightness of the screen displayed in the anti-spy area. The maximum value to further enhance the anti-spy effect.
  • the above display device provided by the embodiment of the present disclosure can be applied to any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • Embodiments of the present disclosure also provide a display system.
  • the principle of the display system solving the problem is similar to that of the above display device. Therefore, the specific implementation of the display system can be referred to the implementation of the above display device, and the repeated description is omitted.
  • a display system provided by an embodiment of the present disclosure includes a display device provided by any of the embodiments of the present disclosure and includes anti-spy glasses 14.
  • the anti-snag glasses 14 (the lenses of the anti-spy glasses 14) are configured to transmit light emitted from the first phase retarder and block light emitted from the second phase retarder, thereby causing the eyes of the user wearing the anti-spy glasses 14 It is possible to receive only the screen displayed in the anti-spy area, so that the screen displayed in the compensation area cannot interfere with the screen displayed in the anti-spy area, and the user wearing the anti-spy glasses 14 can acquire the information carried by the screen displayed in the anti-spy area.
  • the anti-slip glasses 14 (the lenses of the anti-spy glasses 14) include a phase retardation film on the light-input side of the lens of the anti-spy glasses, and a polarizing layer on the light-emitting side of the lens of the anti-spy glasses, that is, incident Light rays incident on the lenses of the speculum glasses 14 are sequentially incident on the phase retardation film and the polarizing layer.
  • the polarizing layer is closer to the user's eyes than the phase retardation film.
  • the phase retardation film can be implemented as a quarter wave plate (ie, a quarter phase retarder) and configured to convert light emitted from the first phase retarder into first linearly polarized light, which will The light emitted from the second phase retarder is converted into second linearly polarized light, and the polarization direction of the first linearly polarized light is perpendicular to the polarization direction of the second linearly polarized light.
  • a quarter wave plate ie, a quarter phase retarder
  • the polarizing layer is configured as a linear polarizer, and the transmission axis of the polarizing layer is parallel to the polarization direction of the first linearly polarized light, and perpendicular to the polarization direction of the second linearly polarized light; in this case, the first linearly polarized light can be transparent.
  • the lens of the anti-shine eyeglasses 14 passes, and the second linearly polarized light cannot pass through the lens of the anti-slip glasses 14, and therefore, the anti-spy glasses 14 are configured to transmit only the light emitted from the first phase retarder, but are not transmissive from the second The light emitted from the phase retarder, whereby the eyes of the user wearing the anti-spy glasses 14 can receive only the screen displayed in the anti-spy zone, and the screen displayed in the compensation area cannot interfere with the screen displayed in the anti-spy zone.
  • phase retardation film and the polarizing layer can be set according to actual application requirements, which is not specifically limited in the embodiment of the present disclosure.
  • the phase retardation film and the polarizing layer are parallel to each other.
  • the phase retardation film may have the same phase retardation characteristics as the first phase retarder, the phase retardation film and the second phase retarder have complementary phase delay characteristics, and the transmission axis of the polarizing layer and the transmission axis of the polarizer 11 vertical.
  • the phase retardation film and the second phase retarder have complementary phase delay characteristics, which means that the second phase retarder pair of ordinary light (o light) and extraordinary light (e light) in the light transmitted through the second phase retarder
  • the absolute value of the amount of change in the phase difference between the two is equal to the absolute value of the amount of change in the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the phase retardation film by the phase retardation film
  • the sign of the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light is opposite; in this case, the first phase retarder is in the light transmitted through the first phase retarder
  • the phase retardation film may have the same phase retardation characteristic as the first phase retarder, and refers to ordinary light (o light) and extraordinary light (e light) in the light of the first phase retarder pair transmitted through the first phase retarder.
  • the amount of change in the phase difference between them is equal to the amount of change in the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the phase retardation film by the phase retardation film.
  • the first phase retarder changes the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the first phase retarder by + ⁇ /2, and the second phase delay
  • the amount of change in the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the second phase retarder is - ⁇ /2, and the phase retardation film is transmitted through the phase retardation film.
  • the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light is also changed by + ⁇ /2.
  • the combination structure of the first phase retarder and the phase retardation film is configured.
  • the combined structure of the second phase retarder and the phase retardation film is configured such that the second phase retarder and the phase are sequentially incident.
  • the polarization direction of the light of the retardation film remains unchanged; that is, the polarization direction of the light source from the phase retardation film originating from the anti-seepage region is perpendicular to the transmission axis of the polarizer 11, and the source of the phase retardation film is derived from the compensation region.
  • the polarization direction of the light is parallel to the transmission axis of the polarizer 11.
  • the transmission axis of the polarizing layer is perpendicular to the transmission axis of the polarizer 11
  • the light from the anti-seepage region ie, the first linearly polarized light
  • the light from the compensation region i.e., the second linearly polarized light
  • phase retardation film and the polarizing layer are parallel to each other
  • the phase retardation film may have complementary phase delay characteristics with the first phase retarder
  • the phase retardation film and the second phase retarder have the same phase retardation characteristic
  • the polarized light The transmission axis of the layer is parallel to the transmission axis of the polarizer 11.
  • the first phase retarder changes the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the first phase retarder by + ⁇ /2, and the second phase delay
  • the amount of change in the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light transmitted through the second phase retarder is - ⁇ /2, and the phase retardation film is transmitted through the phase retardation film.
  • the phase difference between the ordinary light (o light) and the extraordinary light (e light) in the light is also changed by - ⁇ /2.
  • the combined structure configuration of the first phase retarder and the phase retardation film In order to keep the polarization direction of the light incident sequentially to the first phase retarder and the phase retardation film constant, the combined structure of the second phase retarder and the phase retardation film is configured such that the second phase retarder and the phase are sequentially incident.
  • the polarization direction of the light of the retardation film is rotated by 90 degrees; that is, the polarization direction of the light source from the phase retardation film originating from the anti-seepage region is parallel to the transmission axis of the polarizer 11, and the source of the phase retardation film is derived from the compensation region.
  • the direction of polarization of the light is perpendicular to the transmission axis of the polarizer 11.
  • the transmission axis of the polarizing layer is parallel to the transmission axis of the polarizer 11
  • the light from the anti-seepage region (ie, the first linearly polarized light) emitted from the phase retardation film can pass through the polarizing layer.
  • the light from the compensation region (i.e., the second linearly polarized light) emitted from the phase retardation film cannot pass through the polarizing layer and cannot enter the eyes of the user.
  • the optical axis (or fast axis) of the phase retardation film the optical axis (or fast axis) of the first phase retarder, the optical axis (or fast axis) of the second phase retarder, the transmission axis of the polarizer 11, and
  • the relationship between the transmission axes of the polarizing layers can be set according to actual application requirements, and the embodiment of the present disclosure does not specifically set this.
  • the anti-squinting glasses 14 have the same phase retardation film (not shown) as the fast axis direction of the first phase retarder 121.
  • the anti-squinting glasses 14 have the same phase retardation film as the fast-axis direction of the first phase retarder 121, the light emitted from the first phase retarder 121 can pass through the anti-slip glasses 14 and be delayed from the second phase. The light emitted from the sheet 122 cannot pass through the anti-slip glasses 14.
  • the fast-axis direction of the phase retardation film on the first phase retarder 121 and the anti-shine glasses 14 is at an angle of 45° with respect to the horizontal direction
  • the second phase retarder When the fast axis direction of 122 is -45° from the horizontal direction, the light emitted from the first phase retarder 121 is left-handed circularly polarized light, and the light emitted from the second phase retarder 122 is right-handed circularly polarized light.
  • the phase retardation film on the anti-eye glasses 14 is configured such that the left-handed circularly polarized light can pass through the anti-slip glasses 14 (the lenses of the anti-spy glasses 14), and the right-handed circularly polarized light cannot pass through the anti-slip glasses 14 (
  • an embodiment of the present disclosure also provides a driving method of the above display device.
  • the principle of the driving method is similar to that of the above display device. Therefore, the specific implementation of the driving method can be referred to the implementation of the above display device, and the repeated description is not repeated.
  • the driving method includes at least one of step S201 and step S202.
  • Step S201 In the anti-spy display mode, input a peep-preventing display signal to each pixel in the anti-spy area, and input a compensation display signal to each pixel in the compensation area, so that the screen displayed in the anti-spy area is a peep-proof picture.
  • the superimposed screen of the screen displayed in the compensation area and the screen displayed in the anti-peep area is an interference screen.
  • Step S202 In the normal display mode, input a first display signal to each pixel in the anti-peep area, and input a second display signal to each pixel in the compensation area, so that the screen displayed in the anti-peep area and the compensation area are displayed.
  • the superimposed screen of the screen is the normal display screen.
  • the anti-spy display signal is input to each pixel in the anti-peep area in the anti-spy display mode, and the compensation display signal is input to each pixel in the compensation area. Therefore, the screen displayed in the anti-spy area is a peep-preventing picture, and the picture displayed in the compensation area and the picture displayed in the anti-spy area are interference pictures, so that the user wearing the anti-spy glasses can view the anti-spy picture and make the naked eye view The user can only see the interference picture, thus achieving the anti-peep effect.
  • the first display signal is input to each pixel in the anti-peep area
  • the second display signal is input to each pixel in the compensation area, so that the superimposed picture of the compensation area and the anti-peep area is the normal display picture. So that the user watching the naked eye sees the normal display.
  • different display signals are input into the pixels corresponding to the anti-spy area and the compensation area in different display modes, so that the display device can not only realize the anti-spy display, It is also possible to switch between the anti-spy display mode and the normal display mode.
  • the anti-spy area does not affect the display effect in the normal display mode, thereby increasing the application scenario and use of the display device.
  • the anti-spy display signal is input to each pixel in the anti-spy area, and the compensation is input to each pixel in the compensation area.
  • Display signals which can include:
  • the anti-spy display signal corresponding to the first brightness value is input to each pixel in the anti-peep area, and the compensation display signal corresponding to the second brightness value is input to each pixel in the compensation area;
  • the sum of the second brightness value of each pixel and the first brightness value of the pixel in the adjacent anti-peep area is a preset value, so that the interference picture is a picture under the gray level corresponding to the preset value.
  • the sum of the second brightness value of each pixel in the compensation area and the first brightness value of the pixel in the adjacent anti-peep area is a preset value, so that the compensation picture displayed by the compensation area is prevented.
  • the superimposed effect of the anti-peeping picture displayed in the peek area is a white picture under a certain gray level, and the user who is nakedly viewed can only see the white picture, and does not see any display information, thereby achieving the anti-peep effect.
  • the grayscale value of the white screen corresponds to a sum of the first luminance value and the second luminance value (ie, a preset value), and the voltage values corresponding to the first luminance value and the second luminance value may be based on the voltage value and the transparent value.
  • the relationship of the rate ie VT curve is determined.
  • the first brightness value of each pixel in the anti-spy area may be the same value, if the anti-spy picture is a color picture
  • the first brightness value of each pixel in the anti-peep area may also be a different value.
  • the second brightness value may also be determined according to the compensation picture to be displayed, where the first brightness value refers to the corresponding anti-peep.
  • the brightness value of each pixel in the area, the second brightness value refers to the brightness value of each pixel in the corresponding compensation area, and does not limit the size of the first brightness value and the second brightness value.
  • pixels of the M-th line of each of the anti-spy areas are adjacent to the anti-spy area in the row direction (located in the defense).
  • the pixels in the Mth row of the compensation region of the right side of the peek region constitute one pixel group; in this case, the display panel includes a plurality of pixel groups arranged in an array.
  • a predetermined brightness value can be set for each pixel group.
  • the luminance values of different pixel groups may be identical to each other (eg, 300 nit) such that the display panel displays a white screen.
  • the brightness values of different groups of pixels may cause the display panel to display a predetermined picture (eg, thank you for viewing).
  • a predetermined picture eg, thank you for viewing.
  • the luminance value of each pixel of the privacy zone it may be acquired based on the luminance value of each pixel of the privacy zone and the predetermined luminance value of each pixel group (eg, predetermined luminance of each pixel group)
  • the value minus the luminance value of the pixel of the corresponding anti-peep area) the luminance value (for example, the luminance compensation value) of each pixel of the compensation area by providing a drive corresponding to the required brightness compensation value to each pixel of the compensation area
  • the signal may be such that the superimposed screen of the screen displayed in the compensation area and the screen displayed in the anti-spy zone is a white screen or a predetermined screen.
  • the interference picture is a white picture with a gray scale, which is a preferred embodiment of the embodiment of the present disclosure.
  • the interference picture may also be another interference-enabled picture, for example. You can display the words "Thank you for watching” or display the pattern such as flowers or apples.
  • the interference screen is not limited here.
  • the preset value is preferably 300 nit. Setting the preset value to 300 nit is a preferred embodiment of the embodiment of the present disclosure.
  • the preset value may also be other values, such as 250 nit or 200 nit, etc., and the size of the preset value is not limited herein.
  • the first brightness value is in the range of 50 nit-100 nit
  • the second brightness value is in the range of 350 nit-800 nit.
  • the second brightness value of each pixel in the compensation area is set to be larger, and the second brightness value of each pixel in the anti-peep area is The setting is small, thereby improving the interference capability of the superimposed picture of the anti-peep area and the compensation area.
  • the first brightness value and the second brightness value may vary within a certain range, as long as the sum of the two is a preset value, for example, the anti-peep area includes brightness values of 60 nit, 65 nit, 70 nit, respectively.
  • the six pixels of 80 nit, 85 nit, and 90 nit, the brightness values of the pixels in the compensation area adjacent to the six pixels may be 430 nit, 425 nit, 420 nit, 410 nit, 405 nit, 400 nit, where the above preset values are For example, for 490nit, the preset value can also be set to other values, which is not limited here.
  • the display device, the display device manufacturing method, and the display system display the anti-spy screen in the anti-spy area in the anti-spy display mode, and the superimposed screen of the screen displayed in the compensation area and the anti-spy area display interferes
  • the screen so that the user wearing the anti-spy glasses can view the anti-peeping picture, and the picture viewed by the user who is naked-eye viewing is the interference picture, thereby achieving the anti-peep effect, and in the normal display mode, the picture and the compensation area displayed in the anti-peep area
  • the superimposed screen of the displayed screen is a normal display screen, so that the user who is viewed by the naked eye can view the normal display screen. Therefore, the anti-spy display does not affect the display effect of the normal display, thereby alleviating the poor display effect of the anti-spy display device. problem.

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Abstract

一种显示装置、显示装置驱动方法及显示系统。显示装置包括显示面板(10)，位于显示面板(10)出光面一侧的偏光片(11)，以及位于偏光片(11)出光面一侧的相位延迟片(12)。显示面板(10)的显示区域包括防窥区域(A)和补偿区域(B)；相位延迟片(12)包括：对应于防窥区域(A)的第一相位延迟片(121)和对应于补偿区域(B)的第二相位延迟片(122)；第一相位延迟片(121)和第二相位延迟片(122)均为四分之一波长相位延迟片；第一相位延迟片(121)和第二相位延迟片(122)被配置为在工作中将入射到第一相位延迟片(121)的光线和入射到第二相位延迟片(122)的光线分别转换为旋转方向相反的偏振光。显示装置与防窥眼镜(14)配合使用可以实现防窥功能。

Description

显示装置、其驱动方法及显示系统
对相关申请的交叉参考
本申请要求于2018年4月16日递交的中国专利申请第201810336654.X号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开涉一种显示装置、显示装置的驱动方法及显示系统。
背景技术
目前，随着显示技术与网络技术的发展，越来越多的人在网络上进行购物或者支付等操作。在进行上述操作过程中，操作者可能需要在电脑、手机、自动柜员机、自动取票机等包括显示屏幕的设备上输入个人信息，从而可能造成个人信息的泄露。
发明内容
本公开的至少一个实施例提供了一种显示装置，该显示装置包括显示面板，位于所述显示面板出光面一侧的偏光片，以及位于所述偏光片出光面一侧的相位延迟片。所述显示面板的显示区域包括防窥区域和补偿区域；所述相位延迟片包括：对应于所述防窥区域的第一相位延迟片和对应于所述补偿区域的第二相位延迟片；所述第一相位延迟片和所述第二相位延迟片均为四分之一波长相位延迟片；所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为旋转反向相反的偏振光。
例如，在所述显示装置的至少一个示例中，所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为左旋偏振光和右旋偏振光；或者，所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述 第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为右旋偏振光和左旋偏振光。
例如，在所述显示装置的至少一个示例中，所述第一相位延迟片和所述第二相位延迟片具有互补的相位延迟特性。
例如，在所述显示装置的至少一个示例中，所述第一相位延迟片引起的相位延迟值的绝对值与所述第二相位延迟片引起的相位延迟值的绝对值均等于π/2。
例如，在所述显示装置的至少一个示例中，所述第一相位延迟片的快轴方向与所述第二相位延迟片的快轴方向的夹角为90°。
例如，在所述显示装置的至少一个示例中，所述偏光片配置为在工作中将所述显示面板发出的、入射至所述偏光片上的光线转换为线偏振光；所述偏光片的透光轴与所述第一相位延迟片的光轴的夹角以及所述偏光片的透光轴与所述第二相位延迟片的光轴的夹角均为45°，所述第一相位延迟片和所述第二相位延迟片均配置为在工作中将所述线偏振光转换为圆偏振光。
例如，在所述显示装置的至少一个示例中，在防窥显示模式下，所述防窥区域显示的画面为防窥画面，所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为干扰画面；以及在正常显示模式下，所述防窥区域显示的画面与所述补偿区域显示的画面的叠加画面为正常显示画面。
例如，在所述显示装置的至少一个示例中，所述显示装置还包括控制器。所述控制器配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为白画面或者预定画面。
例如，在所述显示装置的至少一个示例中，所述显示装置还包括控制器。所述控制器配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面的亮度平均值大于所述防窥区域显示的画面的亮度平均值的最大值。
例如，在所述显示装置的至少一个示例中，所述控制器还配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面的亮度平均值与所述防窥区域显示的画面的亮度平均值的最大值的比值约为3-16。
例如，在所述显示装置的至少一个示例中，所述显示面板包括呈阵列排布的多个像素；以及所述防窥区域包括至少一个所述像素，所述补偿区域包括至少一个所述像素。
例如，在所述显示装置的至少一个示例中，所述显示面板包括多个所述防窥区域与多个所述补偿区域；以及多个所述防窥区域与多个所述补偿区域在行方向和列方向的至少之一上交替排布。
例如，在所述显示装置的至少一个示例中，多个所述防窥区域包括奇数行的所述像素，多个所述补偿区域包括偶数行的所述像素；或，多个所述防窥区域包括偶数行的所述像素，多个所述补偿区域包括奇数行的所述像素；或，多个所述防窥区域包括奇数列的所述像素，多个所述补偿区域包括偶数列的所述像素；或，多个所述防窥区域包括偶数列的所述像素，多个所述补偿区域包括奇数列的所述像素；或，每个所述补偿区域包括两行所述像素，每个所述防窥区域包括一行所述像素；或，每个所述补偿区域包括两列所述像素，每个所述防窥区域包括一列所述像素。
例如，在所述显示装置的至少一个示例中，所述补偿区域的面积大于所述防窥区域的面积。
例如，在所述显示装置的至少一个示例中，所述第一相位延迟片在所述显示面板上的正投影与所述防窥区域重叠；以及所述第二相位延迟片在所述显示面板上的正投影与所述补偿区域重叠。
本公开的至少一个实施例还提供了一种显示系统，该显示系统包括：防窥眼镜以及本公开的任一实施例提供的显示装置。所述防窥眼镜包括镜片，所述镜片配置为透射从所述第一相位延迟片出射的光线且阻挡从所述第二相位延迟片出射的光线。
例如，在所述显示系统的至少一个示例中，所述镜片包括相位延迟膜和偏光层；所述镜片包括入光侧，相比于所述偏光层，所述相位延迟膜更靠近所述入光侧；所述相位延迟膜配置为在工作中将从所述第一相位延迟片出射的光线转换为第一线偏振光，将从所述第二相位延迟片出射的光线转换为第二线偏振光，且使得所述第一线偏振光的偏振方向垂直于所述第二线偏振光的偏振方向；以及所述第一线偏振光的偏振方向与所述偏光层的透光轴平行。
例如，在所述显示系统的至少一个示例中，所述相位延迟膜与所述第一相位延迟片具有相同的相位延迟特性，所述相位延迟膜与所述第二相位延迟片具有互补的相位延迟特性，所述偏光层的透光轴与所述偏光片的透光轴垂直；或者，所述相位延迟膜与所述第一相位延迟片具有互补的相位延迟特性， 所述相位延迟膜与所述第二相位延迟片具有相同的相位延迟特性，所述偏光层的透光轴与所述偏光片的透光轴平行。
例如，在所述显示系统的至少一个示例中，所述防窥眼镜具有与第一相位延迟片的快轴方向相同的相位延迟膜。
本公开的至少一个实施例还提供了一种显示装置的驱动方法，其包括：在防窥显示模式下，向所述防窥区域中的各像素输入防窥显示信号，以及向所述补偿区域中的各所述像素输入补偿显示信号，以使所述防窥区域显示的画面为防窥画面，所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为干扰画面；在正常显示模式下，向所述防窥区域中的各所述像素输入第一显示信号，以及向所述补偿区域中的各所述像素输入第二显示信号，以使所述防窥区域显示的画面与所述补偿区域显示的画面的叠加画面为正常显示画面。
例如，在所述驱动方法的至少一个示例中，所述在防窥显示模式下，向所述防窥区域中的各像素输入所述防窥显示信号，以及向所述补偿区域中的各所述像素输入所述补偿显示信号，包括：在所述防窥显示模式下，向所述防窥区域中的各所述像素输入对应第一亮度值的防窥显示信号，以及向所述补偿区域中的各所述像素输入对应第二亮度值的补偿显示信号；所述补偿区域中的各所述像素的第二亮度值与相邻的所述防窥区域中的所述像素的第一亮度值之和为预设定值，以使所述干扰画面为所述预设定值对应的灰阶下的画面。
例如，在所述驱动方法的至少一个示例中，所述预设定值为300nit；或/和，所述第一亮度值在50nit-100nit范围内，所述第二亮度值在350nit-800nit范围内。
附图说明
为了更清楚地说明本公开的实施例的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，并非对本公开的限制。
图1为本公开的一些实施例提供的显示装置的结构示意图之一；
图2为本公开的一些实施例中第一相位延迟片和第二相位延迟片的快轴 的方向的示意图；
图3为本公开的一些实施例提供的显示装置的结构示意图之二；
图4A至图4D为本公开的一些实施例中防窥区域和补偿区域的排布示意图；
图5为本公开的一些实施例提供的显示系统的结构示意图；以及
图6为本公开的一些实施例提供的显示装置的驱动方法的示意性流程图。
具体实施方式
为使本公开的实施例的目的、技术方案和优点更加清楚，下面将结合本公开的实施例的附图，对本公开的实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
为保证显示装置的使用者的个人信息的安全，显示装置的防偷窥性能受到了广泛的关注。另外，某些特殊行业需要特殊的显示装置，以使得机密的信息能够仅传递给特定的人员，这就使得所采用的特殊的显示装置需要具有防偷窥性能。
本公开的发明人在研究中注意到，一种防窥显示装置可以采用具有栅结 构的膜片人工进行隐私状态及分享状态的切换。然而，本公开的发明人注意到，在防窥状态下，显示装置的显示亮度明显下降，例如，显示装置的整体显示亮度下降40％左右。因此，尽管该显示装置能够实现防窥显示，但是降低了正常显示的显示效果，这使用户体验下降。
本公开的实施例提供了一种显示装置、显示装置的驱动方法及显示系统该显示装置包括显示面板，位于显示面板出光面一侧的偏光片，以及位于偏光片出光面一侧的相位延迟片。显示面板的显示区域包括防窥区域和补偿区域；相位延迟片包括：对应于防窥区域的第一相位延迟片和对应于补偿区域的第二相位延迟片；第一相位延迟片和第二相位延迟片均为四分之一波长相位延迟片；第一相位延迟片和第二相位延迟片被配置为在工作中将入射到第一相位延迟片的光线和入射到第二相位延迟片的光线分别转换为旋转反向相反的偏振光。在一些示例中，该显示装置与防窥眼睛配合使用可以实现防窥功能。
下面结合附图，对本公开的实施例提供的显示装置、显示装置的驱动方法及显示系统的具体实施方式进行详细地说明。在一些示例中，附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本公开内容。
本公开的一些实施例提供了一种显示装置，如图1所示，该显示装置包括：显示面板10，位于显示面板10出光面一侧的偏光片11，以及位于偏光片11出光面一侧的相位延迟片(例如，相位延迟层)12；显示面板10的显示区域包括防窥区域A和补偿区域B；相位延迟片12为四分之一波长相位延迟片(下述的第一相位延迟片121和第二相位延迟片122均为四分之一波长相位延迟片)；相位延迟片12包括：对应于防窥区域A的第一相位延迟片121和对应于补偿区域B的第二相位延迟片122；第一相位延迟片121的快轴方向与第二相位延迟片122的快轴方向的夹角为90°；在防窥显示模式下，防窥区域A显示的画面为防窥画面，补偿区域B显示的画面与防窥区域A显示的画面的叠加画面为干扰画面；在正常显示模式下，防窥区域A显示的画面与补偿区域B显示的画面的叠加画面为正常显示画面。
在本公开的一些示例中，防窥画面是指显示装置的用户(例如，佩戴了防窥眼镜的用户)不希望其他人员(例如，未佩戴防窥眼镜的人员)看到且仅针对显示装置的用户显示的画面；干扰画面是指可以隐藏防窥画面所携带 的信息的画面；正常显示画面是指显示装置的用户愿意与其他人员分享的画面。
例如，本公开的实施例提供的显示装置可以与防窥眼镜配合使用，以实现防窥性能，防窥眼镜配置为透射从所述第一相位延迟片出射的光线以及阻挡从第二相位延迟片出射的光线。例如，对于本公开的实施例提供的显示装置，在防窥显示模式下，防窥区域显示防窥画面，补偿区域显示的画面与防窥区域显示的画面的叠加画面为干扰画面，从而佩戴防窥眼镜的用户的眼睛可以仅接收防窥画面，由此佩戴防窥眼镜的用户可以观看到防窥画面；裸眼观看的用户(也即，未佩戴防窥眼镜的用户)的眼睛同时接收防窥画面和补偿画面，由此裸眼观看的用户观看到的画面为干扰画面，从而达到防窥的效果；在正常显示模式下，防窥区域显示的画面与补偿区域显示的画面的叠加画面为正常显示画面，从而使用户在裸眼观看的情况下即可以观看到正常显示画面。本公开的一些实施例提供的显示装置的防窥显示功能不会影响正常显示的显示效果，从而相比于普通的防窥显示装置，本公开的一些实施例提供的显示装置具有较好的显示效果。
如图1所示，偏光片11位于相位延迟片12的靠近显示面板10的一侧。例如，偏光片11可以为线偏光片，且可以配置为将入射其上的光线(例如，自然偏振光)转换为线偏振光，且线偏振光的偏振方向与偏光片11的透光轴平行。例如，由于在显示面板10出光面一侧设置偏光片11，因此，显示面板10出射的光线(例如，自然偏振光)经过偏光片11后转变为线偏振光。
例如，在偏光片11出光面一侧设置相位延迟片12，且该相位延迟片12为四分之一波长相位延迟片(例如，四分之一波片)，线偏振光经过相位延迟片12后转换为椭圆偏振光或圆偏振光。参照图1，相位延迟片12包括第一相位延迟片121和第二相位延迟片122，第一相位延迟片121和第二相位延迟片122配置为分别将入射至第一相位延迟片121和第二相位延迟片122的光线分别转换为旋转反向相反的偏振光。
例如，第一相位延迟片121在显示面板10上的正投影与防窥区域重叠，以使得防窥区域发射的光线能够经第一相位延迟片121离开显示装置；第二相位延迟片122在显示面板10上的正投影与补偿区域重叠，以使得补偿区域发射的光线能够经第二相位延迟片122离开显示装置。例如，第一相位延迟 片121在显示面板10上的正投影与防窥区域完全重叠，第二相位延迟片122在显示面板10上的正投影与补偿区域完全重叠，以提升防窥性能。
例如，第一相位延迟片121和第二相位延迟片122配置为分别将入射至第一相位延迟片121和第二相位延迟片122的光线分别转换为左旋偏振光和右旋偏振光。又例如，第一相位延迟片121和第二相位延迟片122配置为分别将入射至第一相位延迟片121和第二相位延迟片122的光线分别转换为右旋偏振光和左旋偏振光。
需要说明的是，在迎着光线的传播方向，左旋偏振光的电矢量的端点逆时针旋转，右旋偏振光的电矢量的端点顺时针旋转。
例如，左旋偏振光和右旋偏振光可以为椭圆偏振光或圆偏振光。例如，在线偏振光的偏振方向与相位延迟片(例如，第一相位延迟片121或第二相位延迟片122)的光轴的夹角为45°时，相位延迟片配置为分别将入射至相位延迟片上的光线转换为圆偏振光。例如，在线偏振光的偏振方向与相位延迟片(例如，第一相位延迟片121或第二相位延迟片122)的光轴的夹角大于零小于90°时，相位延迟片配置为分别将入射至相位延迟片上的光线转换为椭圆偏振光。
例如，第一相位延迟片121和第二相位延迟片122具有互补的相位延迟特性。
需要说明的是，第一相位延迟片121和第二相位延迟片122具有互补的相位延迟特性是指第一相位延迟片121引起的相位延迟值的绝对值等于第二相位延迟片122引起的相位延迟值的绝对值，且第一相位延迟片121引起的相位延迟值与第二相位延迟片122引起的相位延迟值之和等于零。
需要说明的是，相位延迟片(第一相位延迟片121或第二相位延迟片122)引起的相位延迟值是指相位延迟片对透过相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量。
例如，第一相位延迟片121引起的相位延迟值的绝对值和第二相位延迟片122引起的相位延迟值的绝对值均等于π/2；此种情况下，第一相位延迟片121和第二相位延迟片122配置为分别将入射至第一相位延迟片121和第二相位延迟片122的光线分别转换为旋转反向相反的偏振光。例如，第一相位延迟片121和第二相位延迟片122配置为分别将入射至第一相位延迟片 121和第二相位延迟片122的光线分别转变为左旋圆偏振光和右旋圆偏振光。
例如，相位延迟片(例如，第一相位延迟片121或第二相位延迟片122)的光轴平行于相位延迟片的表面。例如，相位延迟片(例如，第一相位延迟片121或第二相位延迟片122)的光轴与偏光片11透光轴的夹角为45度。例如，线偏振光垂直入射到相位延迟片，也即，线偏振光的传输方向垂直于相位延迟片。例如，第一相位延迟片121为正晶体，第二相位延迟片122为负晶体；又例如，第一相位延迟片121为负晶体，第二相位延迟片122为正晶体。
需要说明的是，相位延迟片中传播速度快的光矢量方向为快轴。在相位延迟片为正晶体中，相位延迟片中寻常光的速度大于非常光的速度，因此，相位延迟片中寻常光的光矢量方向为相位延迟片的快轴。在相位延迟片为负晶体中，相位延迟片中非常光的速度大于寻常光的速度，因此，相位延迟片中非常光的光矢量方向为相位延迟片的快轴。
例如，还可以以相位延迟片的快轴作为参考，此种情况下，当偏光片11的透过轴方向与相位延迟片的快轴方向夹角为45°时，得到的光线为圆偏振光，当偏光片11的透过轴方向与相位延迟片的快轴方向夹角为其他角度(例如，零度、90度、45度之外的其它角度)得到的是椭圆偏振光。
为清楚起见，本公开的实施例以经过相位延迟片12的光线转变为圆偏振光为例进行说明，此种情况下，本公开的实施例中的偏振片11的透过轴方向与相位延迟片(例如，第一相位延迟片121或第二相位延迟片122)的快轴(或者光轴)方向夹角为45°，但本公开的实施例并不对偏光片的透过轴与相位延迟片的快轴(或光轴)的夹角大小进行限定。
例如，第一相位延迟片121的快轴方向与第二相位延迟片122的快轴方向的夹角为90°。例如，参照图2，在偏光片11的透过轴方向为水平方向(即图中箭头x方向)的情况下，第一相位延迟片121的快轴方向与水平方向的夹角可以为45°(即图中S1所示的方向)，第二相位延迟片122的快轴方向与水平方向的夹角可以为-45°(即图中S2所示的方向)；此种情况下，通过第一相位延迟片121和第二相位延迟片122后得到的圆偏振光的旋转方向不同，例如透过第一相位延迟片121后得到的是左旋圆偏振光，透过第二相位延迟片122后得到的是右旋圆偏振光。
若用户佩戴相应的防偷窥眼镜，例如只能透过左旋圆偏振光的眼镜，则用户只能观看到防窥区域A显示的画面，看不到补偿区域B的画面，因此，在防窥显示模式下，可以通过控制防窥区域A显示防窥画面，使佩戴相应的防窥眼镜的用户观看到防窥画面，同时控制补偿区域B显示补偿画面，使补偿区域B显示的画面与防窥区域A显示的画面为干扰画面，从而使裸眼观看的用户看到的画面为干扰画面，因而实现了防窥效果。
在实际应用中，上述偏光片的透过轴方向和相位延迟片的快轴方向可以根据实际情况进行调整，例如偏光片的透过轴与水平方向夹角为45°，则第一相位延迟片的快轴方向可以设置为水平方向，第二相位延迟片的快轴方向可以这是为垂直方向，此处不对偏光片的透过轴方向以及相位延迟片的快轴方向进行限定。
例如，在正常显示模式下，可以将防窥区域A和补偿区域B作为整体实现显示装置的显示功能。例如，可以使得防窥区域A显示的画面与补偿区域B显示的画面的叠加画面为正常显示画面，从而使裸眼观看的用户能够观看到正常显示画面，因此本公开的一些实施例提供的显示装置的防窥显示功能不会影响正常显示画面的显示效果。例如，在正常显示模式下，显示区中所有的像素都参与显示，此种情况下，显示面板的分辨率和显示效果不会受到影响。
例如，在具体实施时，上述显示面板出射的光线只要能够透过上述偏光片即可，例如上述显示面板出射的光线可以是自然光、椭圆偏振光、圆偏振光以及不与上述偏光片的透过轴方向垂直的线偏振光，例如上述显示面板可以是有机电致发光(Organic Light-Emitting Diode，OLED)显示面板，也可以是液晶显示面板(Liquid Crystal Display，LCD)，例如，液晶显示面板可以基于扭曲排列(Twisted，TN)模式、高级超维场转换模式(Advanced Super Dimension，ADS)模式或垂直取向(Vertical Aligment，VA)模式等，此处不对显示面板的类型进行限定。
图3中以上述显示面板为液晶显示面板为例进行举例说明，如图3所示，显示面板10可以包括：彩膜基板101、阵列基板102，以及位于彩膜基板101与阵列基板102之间的液晶层103，彩膜基板101上设有彩色滤光层104(例如，彩膜基板101包括彩色滤光层104)。在显示面板10的外侧还设置有上 偏光片和下偏光片13，例如，彩膜基板101的远离阵列基板102的一侧设置有上偏光片，阵列基板102的远离彩膜基板101的一侧设置有下偏光片。例如，上偏光片与上述偏光片11可以实现为同一偏光片，也即，在显示面板为液晶显示面板的情况下，可以将偏光片11复用为显示面板10的上偏光片(也即，位于显示面板的出光侧的偏光片)，此种情况下，显示面板10无需设置上偏光片；又例如，也上偏光片与偏光片11可以分别采用透光轴方向不垂直的两个偏光片，此处不做限定。
例如，本公开的实施例提供的上述显示装置中，显示面板可以包括呈阵列排布的多个像素。例如，每个像素包括多个子像素(例如，红色子像素、滤色子像素和蓝色子像素)。例如，每个防窥区域包括至少一个像素(例如，一行或一列显示像素)，每个显示区域包括至少一个像素(例如，一行或一列显示像素)。例如，在防窥显示模式下，防窥区域用来显示防窥画面，补偿区域用来显示补偿画面，以使补偿区域显示的画面与防窥区域显示的画面的叠加画面为干扰画面。
例如，显示面板可以包括多个防窥区域和多个补偿区域，多个防窥区域与多个补偿区域在行方向和/或列方向交替排布。例如，在显示面板包括多个防窥区域和多个补偿区域的情况下，相位延迟片包括多个第一相位延迟片以及多个第二相位延迟片，多个第一相位延迟片分别与多个防窥区域对置，多个第二相位延迟片分别与多个补偿区域对置。例如，在多个防窥区域与多个补偿区域在行方向和/或列方向交替排布的情况下，多个第一相位延迟片和多个第二相位延迟片在行方向和/或列方向交替排布。
例如，通过将防窥区域与补偿区域设置为交替排布，可以使得每一个防窥区域的附近都会有补偿区域，以提升补偿区域对防窥区域的干扰效果和/或便于补偿区域与防窥区域的画面进行叠加，提高了干扰画面的干扰效果，避免裸眼观看的用户观看到防窥画面(不能清楚的观看到防窥画面)。
例如，本公开的实施例提供的上述显示装置中，多个防窥区域和多个补偿区域的排布方式可以采用图4A至图4D所示排布方式的任一中。例如，图4A至图4D中，A1、A2、A3、A4、A5……表示防窥区域，B1、B2、B3、B4、B5……表示补偿区域，数字1、2、3……10……表示像素行数或列数。
例如，如图4A所示，多个防窥区域(如图4A中A1、A2、A3、A4、 A5……)可以对应(包括)奇数行的像素，多个补偿区域(如图4A中B1、B2、B3、B4、B5……)可以对应偶数行的像素。
例如，如图4B所示，多个防窥区域(如图4B中A1、A2、A3、A4、A5……)可以对应(包括)偶数行的像素，多个补偿区域(如图4B中B1、B2、B3、B4、B5……)可以对应(包括)奇数行的像素。
例如，如图4C所示，多个防窥区域(如图4C中A1、A2、A3、A4、A5……)可以对应(包括)奇数列的像素，多个补偿区域(如图4C中B1、B2、B3、B4、B5……)可以对应(包括)偶数列的像素。
例如，如图4D所示，多个防窥区域(如图4D中A1、A2、A3、A4、A5……)可以对应(包括)偶数列的像素，多个补偿区域(如图4D中B1、B2、B3、B4、B5……)可以对应(包括)奇数列的像素。
在图4A至图4D所示排布方式中，防窥区域与补偿区域所占的面积相同或者仅差一行或一列像素；此种情况下，例如，防窥区域与补偿区域比较均匀，在正常显示模式下显示效果较好，不会影响显示面板的显示均一性。需要说明的是，图4A至图4D所示排布方式只是举例说明，在具体实施时，防窥区域和补偿区域也可以按其他方式进行排布，例如在行方向和列方向均交替排布，从而使得防窥区域和补偿区域形成棋盘格图案，此种情况下，补偿区域的干扰效果可以更好，此处不对防窥区域和补偿区域的排布方式进行限定。
例如，在实际应用中，本公开的实施例提供的一些显示装置的示例中，上述补偿区域的面积可以大于防窥区域的面积。在防窥显示模式下，通过补偿区域显示补偿画面，以使补偿区域显示的画面与防窥区域显示的画面的叠加画面为干扰画面，从而使裸眼观看的用户观看到的画面为干扰画面，避免防窥画面被裸眼观看的用户看到。例如，将补偿区域的面积设置为大于防窥区域的面积，在防窥显示模式下，补偿区域显示的画面对防窥区域显示的画面的干扰能力更强，此种情况下，显示装置显示的干扰画面的干扰能力更强，从而该显示装置的防窥性能更好。
例如，在防窥显示模式下，补偿区域用来起干扰作用。例如，实现补偿区域的面积大于防窥区域的面积的方法可以根据实际应用需求进行选择，本公开的实施例对此不做具体限定。例如，可以使得补偿区域中像素(单个像 素)的面积设置大于防窥区域中像素的面积，此种情况下，补偿区域中像素的个数可以等于或大于防窥区域中像素的个数。又例如，还可以使得补偿区域中像素的个数大于防窥区域中像素的个数，此种情况下，补偿区域中的像素的面积可以等于或大于防窥区域中的像素的面积，此处不做限定。
例如，在本公开的实施例提供的显示装置的一些示例中，上述补偿区域可以对应两行像素，防窥区域可以对应一行像素。又例如，补偿区域可以对应两列像素，防窥区域可以对应一列像素。例如，补偿区域包括的像素的个数(或者行数、列数)与防窥区域包括的像素的个数(或者行数、列数)的比例不限于2:1，根据实际应用需求，补偿区域包括的像素的个数与防窥区域包括的像素的个数的比例还可以实现为N：1，N为大于1的自然数。
在本公开的一些实施例中，为了提高干扰画面的干扰性能，可以将补偿区域的面积设置为大于防窥区域的面积。例如，可以将补偿区域设置为对应(包括)两行像素，将防窥区域设置为对应(包括)一行像素，或者将补偿区域设置为对应(包括)两列像素，防窥区域设置为对应(包括)一列像素，这样对应防窥区域的每行(或每列)像素的两侧均有对应补偿区域的两行(或两列)像素，从而使得补偿区域显示的画面对防窥区域显示的画面的干扰能力更强和/或使补偿区域显示的补偿画面与防窥区域显示的防窥画面比较容易叠加为干扰画面，提高干扰画面的干扰性能。例如，通过使得防窥区域和补偿区域分别在显示装置中均匀排布，可以使得防窥区域和补偿区域的排布不会影响显示装置的显示均一性。
在一些示例中，显示装置还包括驱动电路和控制器，该驱动电路用于向显示装置的多个像素提供驱动信号，以使得多个像素呈现所需的亮度。例如，该控制器配置为通过控制驱动电路，来使得多个像素呈现所需的亮度。
例如，该控制器配置为在防窥显示模式下使得补偿区域的单个像素的亮度大于防窥区域的单个像素的亮度，由此使得补偿区域发射的光线对于防窥区域发射的光线产生较强的干扰，由此使得裸眼用户难以清楚的观看到防窥区域显示的画面。例如，控制器配置为使得补偿区域显示的画面的亮度平均值大于防窥区域显示的画面的亮度平均值的最大值。补偿区域显示的画面的亮度平均值与防窥区域显示的画面的亮度平均值的最大值的比值约为3-16。例如，防窥区域显示的画面的亮度平均值的最大值在50nit-100nit范围内，补 偿区域显示的画面的亮度平均值在350nit-800nit范围内。
又例如，该控制器还可以配置为在防窥显示模式下使得补偿区域显示的画面与防窥区域显示的画面的组合画面为白画面或者预定画面(也即，干扰画面为白画面或者预定画面)，由此使得裸眼用户难以观看到防窥区域显示的画面。例如，上述白画面是指亮度均一的画面(例如，白画面的最高亮度和最低亮度的差值与白画面的亮度平均值的比值小于5％)。例如，该预定画面是指显示装置的用户希望裸眼用户看到或预先设置的画面(例如，谢谢观看)。例如，控制器的具体设置方式可以参见显示装置的驱动方法，在此不再赘述。
例如，在补偿区域显示的画面与防窥区域显示的画面的组合画面为白画面或者预定画面的情况下，补偿区域显示的画面的亮度平均值也可以大于防窥区域显示的画面的亮度平均值的最大值，以进一步地提升防窥效果。
本公开的实施例提供的上述显示装置，可以应用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本公开的实施例还提供了一种显示系统。例如，该显示系统解决问题的原理与上述显示装置相似，因此该显示系统的具体实施可以参见上述显示装置的实施，重复之处不再赘述。
本公开的实施例提供的一种显示系统，如图5所示，该显示系统包括本公开的任一实施例提供的显示装置以及包括防窥眼镜14。
例如，防窥眼镜14(防窥眼镜14的镜片)配置为透射从第一相位延迟片出射的光线以及阻挡从第二相位延迟片出射的光线，由此使得佩戴防窥眼镜14的用户的眼睛可以仅接收防窥区域显示的画面，以使得补偿区域显示的画面无法干扰防窥区域显示的画面，进而使得佩戴防窥眼镜14的用户能够获取防窥区域显示的画面所承载的信息。
例如，防窥眼镜14(防窥眼镜14的镜片)包括相位延迟膜和偏光层，相位延迟膜位于防窥眼镜的镜片入光侧，偏光层位于防窥眼镜的镜片出光侧，也即，入射到防窥眼镜14的镜片上的光线顺次入射至相位延迟膜和偏光层。例如，相比于相位延迟膜，偏光层更为靠近用户的眼睛。
例如，相位延迟膜可以实现为四分之一波片(也即，四分之一相位延迟 片)，并配置为将从第一相位延迟片出射的光线转换为第一线偏振光，将从第二相位延迟片出射的光线转换为第二线偏振光，且使得第一线偏振光的偏振方向垂直于第二线偏振光的偏振方向。
例如，偏光层配置为线偏光片，且偏光层的透光轴与第一线偏振光的偏振方向平行，与第二线偏振光的偏振方向垂直；此种情况下，第一线偏振光可以透过防窥眼镜14的镜片，而第二线偏振光无法透过防窥眼镜14的镜片，因此，防窥眼镜14配置为仅能透射从第一相位延迟片出射的光线，而无法透射从第二相位延迟片出射的光线，由此使得佩戴防窥眼镜14的用户的眼睛可以仅接收防窥区域显示的画面，并使得补偿区域显示的画面无法干扰防窥区域显示的画面。
例如，相位延迟膜和偏光层的具体设置方式可以根据实际应用需求进行设定，本公开的实施例对此不作具体限定。
在一个示例中，相位延迟膜和偏光层彼此平行。例如，相位延迟膜可以与第一相位延迟片具有相同的相位延迟特性，相位延迟膜与第二相位延迟片具有互补的相位延迟特性，且偏光层的透光轴与偏光片11的透光轴垂直。
例如，相位延迟膜与第二相位延迟片具有互补的相位延迟特性是指第二相位延迟片对透过第二相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量的绝对值等于相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量的绝对值，且第二相位延迟片对透过第二相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量的符号与相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量的符号相反；此种情况下，第一相位延迟片对透过第一相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量与相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量的和等于零。
例如，相位延迟膜可以与第一相位延迟片具有相同的相位延迟特性是指第一相位延迟片对透过第一相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量等于相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量。
例如，第一相位延迟片对透过第一相位延迟片的光线中的寻常光(o光) 和非常光(e光)之间的位相差的改变量为+π/2，第二相位延迟片对透过第二相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量为-π/2，且相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量也为+π/2，此种情况下，第一相位延迟片和相位延迟膜的结合结构配置为使得顺次入射至第一相位延迟片和相位延迟膜的光线的偏振方向旋转90度，第二相位延迟片和相位延迟膜的结合结构配置为使得顺次入射至第二相位延迟片和相位延迟膜的光线的偏振方向保持不变；也即，从相位延迟膜出射的源于防窥区域的光线的偏振方向与偏光片11的透光轴垂直，从相位延迟膜出射的源于补偿区域的光线的偏振方向与偏光片11的透光轴平行。例如，由于偏光层的透光轴与偏光片11的透光轴垂直，因此，从相位延迟膜出射的源于防窥区域的光线(也即，第一线偏振光)可以透过偏光层，并入射至用户的眼睛，并使得从相位延迟膜出射的源于补偿区域的光线(也即，第二线偏振光)无法透过偏光层，并无法入射至用户的眼睛中。
在另一个示例中，相位延迟膜和偏光层彼此平行，相位延迟膜可以与第一相位延迟片具有互补的相位延迟特性，相位延迟膜与第二相位延迟片具有相同的相位延迟特性，且偏光层的透光轴与偏光片11的透光轴平行。
例如，第一相位延迟片对透过第一相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量为+π/2，第二相位延迟片对透过第二相位延迟片的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量为-π/2，且相位延迟膜对透过相位延迟膜的光线中的寻常光(o光)和非常光(e光)之间的位相差的改变量也为-π/2，此种情况下，第一相位延迟片和相位延迟膜的结合结构配置为使得顺次入射至第一相位延迟片和相位延迟膜的光线的偏振方向保持不变，第二相位延迟片和相位延迟膜的结合结构配置为使得顺次入射至第二相位延迟片和相位延迟膜的光线的偏振方向旋转90度；也即，从相位延迟膜出射的源于防窥区域的光线的偏振方向与偏光片11的透光轴平行，从相位延迟膜出射的源于补偿区域的光线的偏振方向与偏光片11的透光轴垂直。例如，由于偏光层的透光轴与偏光片11的透光轴平行，因此，从相位延迟膜出射的源于防窥区域的光线(也即，第一线偏振光)可以透过偏光层，并入射至用户的眼睛，并使得从相位延迟膜出射的源于补偿区域的光线(也即，第二线偏振光)无法透过偏光层，并无法入射至用户的眼睛中。
例如，相位延迟膜的光轴(或快轴)、第一相位延迟片的光轴(或快轴)、第二相位延迟片的光轴(或快轴)、偏光片11的透光轴以及偏光层的透光轴之间的关系可以根据实际应用需求进行设定，本公开的实施例对此不作具体设定。
例如，防窥眼镜14具有与第一相位延迟片121的快轴方向相同的相位延迟膜(图中未示出)。例如，由于防窥眼镜14具有与第一相位延迟片121的快轴方向相同的相位延迟膜，因而从第一相位延迟片121出射的光线可以透过防窥眼镜14，而从第二相位延迟片122出射的光线不能透过防窥眼镜14，例如第一相位延迟片121与防窥眼镜14上的相位延迟膜的快轴方向均为与水平方向夹角为45°，第二相位延迟片122的快轴方向为与水平方向的夹角为-45°，则从第一相位延迟片121出射的光线为左旋圆偏振光，从第二相位延迟片122出射的光线为右旋圆偏振光，而防窥眼镜14上的相位延迟膜配置为使得左旋圆偏振光能够透过防窥眼镜14(防窥眼镜14的镜片)，并使得右旋圆偏振光无法透过防窥眼镜14(防窥眼镜14的镜片)；因而防窥眼镜14仅能透过防窥区域显示的画面，从而可以使佩戴防窥眼镜14的用户可以看到防窥区域显示的防窥画面，裸眼观看的用户看到的是防窥区域和补偿区域显示的叠加画面，从而实现防窥显示。
例如，本公开的实施例还提供了一种上述显示装置的驱动方法。例如，该驱动方法解决问题的原理与上述显示装置相似，因此该驱动方法的具体实施可以参见上述显示装置的实施，重复之处不再赘述。
本公开的实施例提供的上述显示装置的驱动方法，如图6所示，该驱动方法包括步骤S201和步骤S202的至少一个。
步骤S201、在防窥显示模式下，向防窥区域中的各像素输入防窥显示信号，以及向补偿区域中的各像素输入补偿显示信号，以使防窥区域显示的画面为防窥画面，补偿区域显示的画面与防窥区域显示的画面的叠加画面为干扰画面。
步骤S202、在正常显示模式下，向防窥区域中的各像素输入第一显示信号，以及向补偿区域中的各像素输入第二显示信号，以使防窥区域显示的画面与补偿区域显示的画面的叠加画面为正常显示画面。
例如，在本公开的一些实施例提供的显示装置的驱动方法，通过在防窥 显示模式下，向防窥区域中的各像素输入防窥显示信号，向补偿区域中的各像素输入补偿显示信号，从而使防窥区域显示的画面为防窥画面，补偿区域显示的画面与防窥区域显示的画面为干扰画面，这样可以使佩戴防窥眼镜的用户可以观看到防窥画面，并使得裸眼观看的用户只能看到干扰画面，从而达到防窥效果。例如，在正常显示模式下，向防窥区域中的各像素输入第一显示信号，向补偿区域中的各像素输入第二显示信号，从而使补偿区域和防窥区域的叠加画面为正常显示画面，从而使裸眼观看的用户观看到正常显示画面。例如，在本公开的一些实施例提供的驱动方法中，在不同的显示模式下，向防窥区域和补偿区域对应的像素中输入不同的显示信号，从而使得显示装置不仅能够实现防窥显示，而且还可以在防窥显示模式和正常显示模式之间切换。例如，防窥区域不会影响正常显示模式下的显示效果，由此可以增加了显示装置的应用场景和用途。
例如，本公开的实施例提供的上述驱动方法中，上述步骤S201中，在防窥显示模式下，向防窥区域中的各像素输入防窥显示信号，以及向补偿区域中的各像素输入补偿显示信号，可以包括：
在防窥显示模式下，向防窥区域中的各像素输入对应第一亮度值的防窥显示信号，以及向补偿区域中的各像素输入对应第二亮度值的补偿显示信号；补偿区域中的各像素的第二亮度值与相邻的防窥区域中的像素的第一亮度值之和为预设定值，以使干扰画面为预设定值对应的灰阶下的画面。
在防窥显示模式下，补偿区域中各像素的第二亮度值与相邻的防窥区域中的像素的第一亮度值之和为预设定值，从而使补偿区域显示的补偿画面与防窥区域显示的防窥画面的叠加效果为某个灰阶下的白画面，裸眼观看的用户只能看到白画面，不会看到任何显示信息，从而达到防窥的效果。该白画面的灰阶值由第一亮度值与第二亮度值之和(即预设定值)对应，且上述第一亮度值和第二亮度值对应的电压值可以根据电压值与透过率的关系(即V-T曲线)来确定。
在实际应用中，在防窥显示模式下，若需要显示的防窥画面为单一颜色的画面，则防窥区域中各像素的第一亮度值可以为同一数值，若该防窥画面为彩色画面，则防窥区域中各像素的第一亮度值也可以为不同的数值，同理，第二亮度值也可以根据需要显示的补偿画面来确定，此处的第一亮度值是指 对应防窥区域中各像素的亮度值，第二亮度值是指对应补偿区域中各像素的亮度值，并不对第一亮度值和第二亮度值的大小进行限定。
例如，在多个防窥区域与多个补偿区域在行方向交替排布的情况下，每个防窥区域的位于第M行的像素和与该防窥区域在行方向上相邻(位于该防窥区域的右侧)的补偿区域的位于第M行的像素构成一个像素组；此种情况下，显示面板包括阵列排布的多个像素组。例如，可以针对每个像素组设置一个预定亮度值。例如，不同的像素组的亮度值可以彼此相同(例如，300nit)，以使得显示面板显示白画面。又例如，不同的像素组的亮度值可以使得显示面板显示预定画面(例如，谢谢观看)。例如，在确定防窥区域的每个像素的亮度值的情况下，可以基于防窥区域的每个像素的亮度值以及每个像素组的预定亮度值获取(例如，每个像素组的预定亮度值减去对应的防窥区域的像素的亮度值)补偿区域的每个像素的亮度值(例如，亮度补偿值)，通过向补偿区域的每个像素提供与所需的亮度补偿值对应的驱动信号，可以使得补偿区域显示的画面与防窥区域显示的画面的叠加画面为白画面或者预定画面。
本公开的实施例中，上述干扰画面为具有设定灰阶的白画面，是本公开的实施例的优选实施方式，在实际应用时，上述干扰画面也可以是其他具有干扰作用的画面，例如可以显示“谢谢观看”等字样，或者显示花朵或苹果等图样，此处不对干扰画面进行限定。
例如，本公开的实施例提供的上述驱动方法中，上述预设定值优选为300nit。将预设定值设置为300nit是本公开的实施例的优选实施方式，此外，该预设定值也可以为其他数值，例如250nit或200nit等，此处不对预设定值的大小进行限定。
例如，本公开的实施例提供的上述驱动方法中，第一亮度值在50nit-100nit范围内，第二亮度值在350nit-800nit范围内。
也就是在第一亮度值和第二亮度值之和为预设定值的基础上，将补偿区域中各像素的第二亮度值设置的较大，防窥区域中各像素的第二亮度值设置的较小，从而提高防窥区域和补偿区域的叠加画面的干扰能力。在实际应用中，第一亮度值和第二亮度值可以在一定范围内变化，只要二者之和为预设定值即可，例如防窥区域中包括亮度值分别为60nit、65nit、70nit、80nit、85nit、 90nit的六个像素，则与这六个像素相邻的补偿区域中的像素的亮度值可以为430nit、425nit、420nit、410nit、405nit、400nit，此处是以上述预设定值为490nit为例，也可以将预设定值设置为其他数值，此处不做限定。
本公开的实施例提供的显示装置、显示装置制作方法及显示系统，在防窥显示模式下，防窥区域显示防窥画面，补偿区域显示的画面与防窥区域显示的画面的叠加画面为干扰画面，从而佩戴防窥眼镜的用户可以观看到防窥画面，裸眼观看的用户观看到的画面为干扰画面，从而达到防窥的效果，在正常显示模式下，防窥区域显示的画面与补偿区域显示的画面的叠加画面为正常显示画面，从而使裸眼观看的用户观看到正常显示画面，因此，防窥显示不会影响正常显示的显示效果，从而缓解了防窥显示装置的显示效果较差的问题。
虽然上文中已经用一般性说明及具体实施方式，对本公开作了详尽的描述，但在本公开的实施例基础上，可以对之作一些修改或改进，这对本领域技术人员而言是显而易见的。因此，在不偏离本公开精神的基础上所做的这些修改或改进，均属于本公开要求保护的范围。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。

Claims (25)

  1. 一种显示装置，包括：显示面板，位于所述显示面板出光面一侧的偏光片，以及位于所述偏光片出光面一侧的相位延迟片；
    其中，所述显示面板的显示区域包括防窥区域和补偿区域；
    所述相位延迟片包括：对应于所述防窥区域的第一相位延迟片和对应于所述补偿区域的第二相位延迟片；
    所述第一相位延迟片和所述第二相位延迟片均为四分之一波长相位延迟片；
    所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为旋转反向相反的偏振光。
  2. 如权利要求1所述的显示装置，其中，所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为左旋偏振光和右旋偏振光；或者
    所述第一相位延迟片和所述第二相位延迟片被配置为在工作中将入射到所述第一相位延迟片的光线和入射到所述第二相位延迟片的光线分别转换为右旋偏振光和左旋偏振光。
  3. 如权利要求1或2所述的显示装置，其中，所述第一相位延迟片和所述第二相位延迟片具有互补的相位延迟特性。
  4. 如权利要求3所述的显示装置，其中，所述第一相位延迟片引起的相位延迟值的绝对值与所述第二相位延迟片引起的相位延迟值的绝对值均等于π/2。
  5. 如权利要求1-4任一所述的显示装置，其中，所述第一相位延迟片的快轴方向与所述第二相位延迟片的快轴方向的夹角为90°。
  6. 如权利要求1-5任一所述的显示装置，其中，所述偏光片配置为在工作中将所述显示面板发出的、入射至所述偏光片上的光线转换为线偏振光；以及
    所述偏光片的透光轴与所述第一相位延迟片的光轴的夹角以及所述偏光片的透光轴与所述第二相位延迟片的光轴的夹角均为45°，所述第一相位延 迟片和所述第二相位延迟片均配置为在工作中将所述线偏振光转换为圆偏振光。
  7. 如权利要求1-6任一所述的显示装置，其中，在防窥显示模式下，所述防窥区域显示的画面为防窥画面，所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为干扰画面；以及
    在正常显示模式下，所述防窥区域显示的画面与所述补偿区域显示的画面的叠加画面为正常显示画面。
  8. 如权利要求7所述的显示装置，还包括控制器，其中，所述控制器配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为白画面或者预定画面。
  9. 如权利要求7所述的显示装置，还包括控制器，其中，所述控制器配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面的亮度平均值大于所述防窥区域显示的画面的亮度平均值的最大值。
  10. 如权利要求8或9所述的显示装置，其中，所述控制器还配置为，在所述防窥显示模式下，使得所述补偿区域显示的画面的亮度平均值与所述防窥区域显示的画面的亮度平均值的最大值的比值约为3-16。
  11. 如权利要求1-10任一所述的显示装置，其中，所述显示面板包括呈阵列排布的多个像素；以及
    所述防窥区域包括至少一个所述像素，所述补偿区域包括至少一个所述像素。
  12. 如权利要求11所述的显示装置，其中，所述显示面板包括多个所述防窥区域与多个所述补偿区域；以及
    多个所述防窥区域与多个所述补偿区域在行方向和列方向的至少之一上交替排布。
  13. 如权利要求12所述的显示装置，其中，多个所述防窥区域包括奇数行的所述像素，多个所述补偿区域包括偶数行的所述像素；或，
    多个所述防窥区域包括偶数行的所述像素，多个所述补偿区域包括奇数行的所述像素；或，
    多个所述防窥区域包括奇数列的所述像素，多个所述补偿区域包括偶数列的所述像素；或，
    多个所述防窥区域包括偶数列的所述像素，多个所述补偿区域包括奇数列的所述像素；或，
    每个所述补偿区域包括两行所述像素，每个所述防窥区域包括一行所述像素；或，
    每个所述补偿区域包括两列所述像素，每个所述防窥区域包括一列所述像素。
  14. 如权利要求11所述的显示装置，其中，所述补偿区域的面积大于所述防窥区域的面积。
  15. 如权利要求1-14任一所述的显示装置，其中，所述第一相位延迟片在所述显示面板上的正投影与所述防窥区域重叠；以及
    所述第二相位延迟片在所述显示面板上的正投影与所述补偿区域重叠。
  16. 一种显示系统，包括：防窥眼镜以及如权利要求1-15任一项所述的显示装置；
    其中，所述防窥眼镜包括镜片，所述镜片配置为透射从所述第一相位延迟片出射的光线且阻挡从所述第二相位延迟片出射的光线。
  17. 如权利要求16所述的显示系统，其中，所述镜片包括相位延迟膜和偏光层；
    所述镜片包括入光侧，相比于所述偏光层，所述相位延迟膜更靠近所述入光侧；
    在工作中，所述相位延迟膜配置为将从所述第一相位延迟片出射的光线转换为第一线偏振光，将从所述第二相位延迟片出射的光线转换为第二线偏振光；以及
    所述第一线偏振光的偏振方向与所述偏光层的透光轴平行，所述第二线偏振光的偏振方向与所述偏光层的透光轴垂直。
  18. 如权利要求16或17所述的显示系统，其中，
    所述相位延迟膜与所述第一相位延迟片具有相同的相位延迟特性，所述相位延迟膜与所述第二相位延迟片具有互补的相位延迟特性，所述偏光层的透光轴与所述偏光片的透光轴垂直；或者，
    所述相位延迟膜与所述第一相位延迟片具有互补的相位延迟特性，所述相位延迟膜与所述第二相位延迟片具有相同的相位延迟特性，所述偏光层的 透光轴与所述偏光片的透光轴平行。
  19. 如权利要求16-18任一所述的显示系统，其中，所述防窥眼镜具有与第一相位延迟片的快轴方向相同的相位延迟膜。
  20. 一种如权利要求1-15任一项所述的显示装置的驱动方法，包括：
    在防窥显示模式下，向所述防窥区域中的各像素输入防窥显示信号，以及向所述补偿区域中的各所述像素输入补偿显示信号，以使所述防窥区域显示的画面为防窥画面，所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为干扰画面；
    在正常显示模式下，向所述防窥区域中的各所述像素输入第一显示信号，以及向所述补偿区域中的各所述像素输入第二显示信号，以使所述防窥区域显示的画面与所述补偿区域显示的画面的叠加画面为正常显示画面。
  21. 如权利要求20所述的驱动方法，其中，在所述防窥显示模式下，所述补偿区域显示的画面与所述防窥区域显示的画面的叠加画面为白画面或者预定画面。
  22. 如权利要求20或21所述的驱动方法，其中，在所述防窥显示模式下，所述补偿区域显示的画面的亮度平均值大于所述防窥区域显示的画面的亮度平均值的最大值。
  23. 如权利要求22所述的驱动方法，其中，在所述防窥显示模式下，所述补偿区域显示的画面的亮度平均值与所述防窥区域显示的画面的亮度平均值的最大值的比值约为3-16。
  24. 如权利要求20所述的驱动方法，其中，所述在防窥显示模式下，向所述防窥区域中的各像素输入所述防窥显示信号，以及向所述补偿区域中的各所述像素输入所述补偿显示信号，包括：
    在所述防窥显示模式下，向所述防窥区域中的各所述像素输入对应第一亮度值的防窥显示信号，以及向所述补偿区域中的各所述像素输入对应第二亮度值的补偿显示信号；所述补偿区域中的各所述像素的第二亮度值与相邻的所述防窥区域中的所述像素的第一亮度值之和为预设定值，以使所述干扰画面为所述预设定值对应的灰阶下的画面。
  25. 如权利要求24所述的驱动方法，其中，所述预设定值为300nit；或/和，
    所述第一亮度值在50nit-100nit范围内，所述第二亮度值在350nit-800nit范围内。
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