CN113885235A - Display device and display method - Google Patents
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- CN113885235A CN113885235A CN202111176801.XA CN202111176801A CN113885235A CN 113885235 A CN113885235 A CN 113885235A CN 202111176801 A CN202111176801 A CN 202111176801A CN 113885235 A CN113885235 A CN 113885235A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
- G02F1/13345—Network or three-dimensional gels
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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Abstract
The embodiment of the application provides a display device and a display method; the display device comprises a display layer and a liquid crystal grating layer, wherein the display layer is used for displaying images, the liquid crystal grating layer is arranged in the light emergent direction of the display layer and guides out light rays emitted by the display layer at a first visual angle or a second visual angle, and the angle range of the first visual angle is smaller than that of the second visual angle; above-mentioned display device sets up the liquid crystal grating layer through the light-emitting direction at the display layer, and the light that the liquid crystal grating layer made the display layer send is derived with first visual angle or second visual angle to make display device can freely switch between peep-proof mode and non-peep-proof peep mode according to the user's demand, and then in effectual protection user privacy, can not influence user experience again.
Description
Technical Field
The present application relates to the field of display, and in particular, to a display device and a display method.
Background
The anti-peep display is one of the special requirements of the display panel, namely, for a front observer, the panel display is normal, and for an observer out of a certain angle (30 degrees), the brightness of the panel is obviously reduced or color information is obviously lost, so that the privacy of the display information is improved. Traditional peep-proof shows usually through laminating peep-proof membrane on the display screen, however paste behind the peep-proof membrane, will bring new inconvenience again, for example the display effect is poor, and luminance is low, and fingerprint identification degree becomes very poor, the fingerprint can't discern even.
Therefore, a display device and a display method are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the application provides a display device and a display method, which can solve the technical problem that the display device in the prior art is poor in display effect after being pasted with an anti-peeping film.
The embodiment of the application provides a display device, which comprises a display layer and a liquid crystal grating layer, wherein the display layer is used for displaying images, and the liquid crystal grating layer is arranged in the light emergent direction of the display layer and guides light rays emitted by the display layer out at a first visual angle or a second visual angle;
wherein the angular range of the first perspective is less than the angular range of the second perspective.
Optionally, in some embodiments of the present application, the liquid crystal grating layer includes a liquid crystal layer and a first electrode layer and a second electrode layer located on two sides of the liquid crystal layer, and a driving electric field formed by the first electrode layer and the second electrode layer drives the liquid crystal layer to deflect;
when a driving electric field formed by the driving electrode layer is within a first preset range, the liquid crystal grating layer leads out emergent light of the display layer at a first visual angle; when a driving electric field formed by the driving electrode layer is within a second preset range, the emergent light of the display layer is led out by the liquid crystal grating layer at a second visual angle.
Optionally, in some embodiments of the present application, the liquid crystal grating layer includes a fingerprint identification area and a liquid crystal grating area disposed around the fingerprint identification area;
the liquid crystal molecule distribution density of the liquid crystal layer in the fingerprint identification area is smaller than that of the liquid crystal layer in the liquid crystal grating area.
Optionally, in some embodiments of the present application, when the display device receives a fingerprint identification signal, the driving electric field in the fingerprint identification area is within the second preset range.
Optionally, in some embodiments of the present application, the display device further includes a flexible circuit board, and the flexible circuit board is further provided with:
the display control module is electrically connected with the display layer and is used for driving the display layer to emit light; and
and the liquid crystal grating control module is electrically connected with the liquid crystal grating layer and is used for controlling the driving electric field formed by the driving electrode layer to be switched from the second preset range to the first preset range.
Optionally, in some embodiments of the present application, the liquid crystal grating control module includes a signal control unit and a power management unit, the signal control unit is configured to output a signal waveform for turning on or off a driving electric field in the liquid crystal grating layer, and the power management unit is configured to provide a voltage to the liquid crystal grating control module.
Optionally, in some embodiments of the present application, when the light emitted by the display layer is guided out at the first viewing angle, the driving voltage of the display layer is a first voltage, and the brightness of the display layer is a first brightness value; when the light emitted by the display layer is led out at the second visual angle, the driving voltage of the display layer is a second voltage, and the brightness of the display layer is a second brightness value;
wherein the first voltage is greater than the second voltage, and the first brightness value is equal to the second brightness value.
Optionally, in some embodiments of the present application, the liquid crystal layer includes a polymer network liquid crystal or a polymer dispersed liquid crystal.
Correspondingly, an embodiment of the present application further provides a display method of a display device, including:
providing a display device; the display device comprises a display layer for displaying images and a liquid crystal grating layer for guiding light rays emitted by the display layer out at a first visual angle or a second visual angle, wherein the liquid crystal grating layer is arranged in the light emergent direction of the display layer, and the angle range of the first visual angle is smaller than that of the second visual angle;
acquiring visual angle configuration information of the display device;
and switching the visual angle of the display device from the second visual angle to the first visual angle according to the visual angle configuration information.
Optionally, in some embodiments of the present application, the step of acquiring the view angle configuration information of the display device further includes:
and determining the visual angle range of the light rays emitted by the display layer according to the user requirements so as to obtain the visual angle configuration information.
The embodiment of the application provides a display device and a display method; the display device comprises a display layer and a liquid crystal grating layer, wherein the display layer is used for displaying images, the liquid crystal grating layer is arranged in the light emergent direction of the display layer and guides out light rays emitted by the display layer at a first visual angle or a second visual angle, and the angle range of the first visual angle is smaller than that of the second visual angle; according to the display device, the liquid crystal grating layer is arranged in the light emitting direction of the display layer, the liquid crystal grating layer enables light emitted by the display layer to be led out at the first visual angle or the second visual angle, so that the display device can be freely switched between the peeping prevention mode and the non-peeping prevention mode according to user requirements, and further, the user experience can not be influenced while the user privacy is effectively protected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a display device according to a first embodiment of the present application;
fig. 2 is a schematic view illustrating a viewing angle range of a liquid crystal grating layer in a display device according to a first embodiment of the present disclosure;
fig. 3 is a schematic plan view of a liquid crystal grating layer in a display device according to a first embodiment of the present application;
fig. 4 is a schematic view of a driving frame of a display device according to a first embodiment of the present disclosure;
fig. 5 is a schematic view of a driving frame of a liquid crystal grating control module in a display device according to a first embodiment of the present disclosure;
fig. 6 is a schematic working diagram of a display device provided in a second embodiment of the present application in a peep-proof mode;
fig. 7 is a schematic working diagram of a display device provided in a second embodiment of the present application in a non-peeping prevention mode;
fig. 8 is a signal waveform diagram and a brightness waveform diagram of a display device in a peep-proof mode and a non-peep-proof mode according to a second embodiment of the present application;
fig. 9 is a flowchart of a display method of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The embodiment of the application aims at the technical problem that the display device in the prior art leads to poor display effect after being pasted with the peep-proof film, and the embodiment of the application can improve the technical problem.
The technical solution of the present application will now be described with reference to specific embodiments.
Referring to fig. 1 to 8, an embodiment of the present application provides a display device 100, including a display layer 12 and a liquid crystal grating layer 14, where the display layer 12 is configured to display an image, and the liquid crystal grating layer 14 is disposed in a light emitting direction of the display layer 12, and guides light emitted by the display layer 12 out at a first viewing angle or a second viewing angle;
wherein the angular range of the first perspective is less than the angular range of the second perspective.
The above-mentioned display device 100 of display device 100 that this application embodiment provided sets up liquid crystal grating layer 14 through the light-emitting direction at display layer 12, liquid crystal grating layer 14 makes the light that display layer 12 sent is derived with first visual angle or second visual angle, thereby makes display device 100 can freely switch between peep-proof mode and non-peep-proof mode according to the user's demand, and then when effectual protection user privacy, can not influence user experience again.
The technical solution of the present application will now be described with reference to specific embodiments.
Example one
Fig. 1 is a schematic cross-sectional view of a display device 100 according to a first embodiment of the present disclosure; the display device 100 includes a display layer 12, a touch layer 13 disposed on the display layer 12, and a liquid crystal grating layer 14 disposed on the touch layer 13, where the display layer 12 is used to display an image, the touch layer 13 is used to provide a touch function, and the liquid crystal grating layer 14 guides out light emitted by the display layer 12 at a first viewing angle or a second viewing angle;
wherein the angular range of the first perspective is less than the angular range of the second perspective.
As shown in fig. 1, the structure shown schematically shows the stacking relationship of the main structures of the present application. The first openings on the liquid crystal grating layer 14 correspond to the second openings of the sub-pixels in the display layer 12 one to one.
In this embodiment, the liquid crystal grating layer 14 is disposed in the light emitting direction of the display layer 12, and the display layer 12 is a liquid crystal display layer. The display layer 12 further includes a backlight module 11, and the backlight module 11 is disposed on one side of the display layer 12 far away from the liquid crystal grating layer 14.
In addition, in other embodiments, the display layer 12 may also be a self-luminous display layer, such as an organic light emitting diode display layer, and the liquid crystal grating layer 14 may be disposed on one side of the self-luminous display layer (e.g., a side of the self-luminous display layer facing a light emitting direction, i.e., a side facing human eyes), so that the display device 100 according to the first embodiment of the present application is adapted to the self-luminous display device 100, such as the organic light emitting diode display device 100, and will not be described herein again.
Further, in the embodiment of the present application, the display layer 12, the touch layer 13, and the liquid crystal grating layer 14 form an integrated structure, so as to form an anti-peeping display integrated screen.
Specifically, the liquid crystal grating layer 14 may include a liquid crystal layer and a driving electrode layer for driving the liquid crystal layer to deflect. The driving electrode layer can be located the first electrode layer and the second electrode layer of liquid crystal layer both sides, first electrode layer is close to backlight unit 11 sets up, the second electrode layer is kept away from backlight unit 11 sets up, first electrode layer with the drive electric field drive of second electrode layer formation the liquid crystal layer deflects, and is right backlight unit 11's emergent light is adjusted.
In the embodiment of the present application, when the driving electric field formed by the driving electrode layer is within a first preset range, the liquid crystal grating layer 14 guides out the light emitted by the backlight module 11 at a first viewing angle; when the driving electric field formed by the driving electrode layer is within a second preset range, the liquid crystal grating layer 14 guides out the light emitted by the backlight module 11 at a second viewing angle.
In the embodiment of the present application, the liquid crystal layer may be, but is not limited to, a polymer network liquid crystal or a polymer dispersed liquid crystal. The liquid crystal molecules are in a fog state under the condition of not being driven by an electric field, so that light incident to the liquid crystal layer is scattered; the liquid crystal molecules are regularly arranged under the condition of being driven by an electric field, and the angle of light rays incident to the liquid crystal layer is not changed.
In an embodiment of the present application, the driving electrode layer may include a common electrode layer and a pixel electrode layer. For vertically aligned liquid crystal, the common electrode layer and the pixel electrode layer may be located at both sides of the liquid crystal layer; for horizontally aligned liquid crystals, the common electrode layer and the pixel electrode layer may be located on one side of the liquid crystal layer.
In the embodiment of the present application, when the driving electric field in the liquid crystal grating layer 14 is within a first preset range, liquid crystal molecules are regularly arranged under the action of the electric field, and are equivalent to a flat glass, the emitting direction of the small-angle light incident to the liquid crystal grating layer 14 is not changed, so that the small-angle light is maintained to be incident to the display layer 12 on the backlight module 11, so as to implement the peep-proof mode of the display device 100; the first preset range is not particularly limited in the present application and may be defined according to the type of liquid crystal as long as the angle of incident light is not changed.
In this embodiment of the application, when the driving electric field in the liquid crystal grating layer 14 is within a second preset range, the small-angle light rays incident to the liquid crystal grating layer 14 will be scattered when passing through the liquid crystal, that is, the small-angle light rays are scattered in the liquid crystal grating layer 14 and incident to the display layer 12 on the backlight module 11 at a full angle, so as to implement the non-peeping prevention mode of the display device 100; the second preset range may be 0 or the driving electrode layer is not connected with electricity, so that the display device 100 is in a fog state.
In this embodiment, the backlight module 11 can realize different backlight modes by adjusting the operating state of the liquid crystal grating layer 14. For example, in the case that the liquid crystal grating layer 14 is powered on, the backlight mode is a privacy-peep-proof mode; when the liquid crystal grating layer 14 is not powered on, the backlight mode is a non-peeping prevention mode.
Fig. 2 is a schematic view illustrating a viewing angle range of the liquid crystal grating layer 14 in the display device 100 according to the first embodiment of the present disclosure; when a user is in a general use environment, for example, an environment of a person or an environment such as a viewing screen that does not need to be peeped, at this time, the driving electric field in the liquid crystal grating layer 14 is in a second preset range, the liquid crystal grating layer 14 guides out the emergent light of the display layer 12 at the second viewing angle (the viewing angle range of the second viewing angle is greater than θ), and at this time, the display picture of the display layer 12 can directly penetrate through the liquid crystal grating layer 14, which is a non-peeping mode (normal mode); when a user is in a surrounding environment with many people, or when using some software and needing an anti-peeping mode (for example, entering software with high privacy such as a mobile phone bank, the user may want to use the anti-peeping mode), at this time, the driving electric field in the liquid crystal grating layer 14 is in a first preset range, the liquid crystal grating layer 14 leads out emergent light of the display layer 12 at the first viewing angle (the viewing angle range of the first viewing angle is less than or equal to θ), so that only light (the viewing angle range is less than or equal to θ) meeting a certain condition can pass through the liquid crystal grating layer 14, that is, when the eyes of the user are in the θ range, a display picture can be seen; when the eyes of the user are out of the theta range, the display screen cannot be seen.
As shown in fig. 3, a schematic plan view of a liquid crystal grating layer 14 in a display device 100 according to a first embodiment of the present application is provided; the liquid crystal grating layer 14 is a pattern of an ultra-micro louver, so that the range of light rays emitted into a mobile phone or a computer screen can be reduced, and most of the light rays only return along the incident direction. Therefore, only the user facing the screen can receive the light and see the content on the screen clearly. On the other hand, the observer who is at a certain angle to the screen cannot receive the light reflected from the screen from the side, so that even if they want to look at the screen, they can only see a piece of paint black.
Further, in the embodiment of the present application, in order to solve the problem that the liquid crystal grating layer 14 disposed on the display layer 12 may cause the fingerprint identification function to fail, the liquid crystal grating layer 14 includes a fingerprint identification area a2 and a liquid crystal grating area a1 disposed around the fingerprint identification area a 2;
wherein the arrangement density of the liquid crystal molecules of the liquid crystal layer in the fingerprint identification area A2 is less than that of the liquid crystal molecules of the liquid crystal layer in the liquid crystal grating area A1. The design can reduce the interference of the liquid crystal layer in the liquid crystal grating layer 14 to the fingerprint identification signal.
In a preferred embodiment of the present application, the liquid crystal layer is not disposed in the fingerprint identification area a 2.
In another preferred embodiment of the present application, the liquid crystal layer is disposed in the fingerprint identification area a2, and the liquid crystal grating layer 14 is driven in a time-sharing manner in the fingerprint identification area a2 and the liquid crystal grating area a 1. When the display device 100 is in the peep-proof mode and receives the fingerprint identification signal, the electric field is driven in the liquid crystal grating layer 14 in the liquid crystal grating region a1 within a first preset range, liquid crystal molecules are regularly arranged under the action of the electric field, and are equivalent to flat glass, the exit direction of small-angle light rays incident to the liquid crystal grating layer 14 is not changed, so that the small-angle light rays are maintained to be incident to the display layer 12 on the backlight module 11, and the peep-proof mode of the display device 100 is realized; meanwhile, the driving electric field in the liquid crystal grating layer 14 in the fingerprint identification area a2 is in a second preset range, and small-angle light rays incident to the liquid crystal grating layer 14 are scattered when passing through liquid crystal, that is, the small-angle light rays are scattered in the liquid crystal grating layer 14 and are incident to the display layer 12 on the backlight module 11 at a full angle.
Fig. 4 is a schematic diagram of a driving frame of a display device 100 according to a first embodiment of the present application; the display device 100 further includes a flexible circuit board 15, the flexible circuit board 15 is further provided with a display control module and a liquid crystal grating control module, the display control module is electrically connected to the display layer 12, and the liquid crystal grating control module is electrically connected to the liquid crystal grating layer 14.
When a driving signal generated by a mobile phone motherboard or a Central Processing Unit (CPU) of a computer is transmitted to the flexible circuit board 15, the display control module in the flexible circuit board 15 provides a display function and a touch function for the display device 100, and the liquid crystal grating control module in the flexible circuit board 15 is used for controlling a driving electric field formed by the driving electrode layer to be switched from the second preset range to the first preset range.
Fig. 5 is a schematic diagram of a driving frame of a liquid crystal grating control module in a display device 100 according to a first embodiment of the present application; the liquid crystal grating control module includes a signal control unit and a power management unit, and the signal control unit may be composed of, for example, a single chip microcomputer and a peripheral circuit thereof, and is mainly responsible for outputting a signal waveform for turning on or off a driving electric field in the liquid crystal grating layer 14. The power management unit can be composed of a switching power supply regulator (DC/DC, which converts input voltage to effectively output fixed voltage), an operational amplifier (a high-gain direct coupling voltage amplification unit with a signal output port and in-phase and anti-phase high-impedance input ends), and other functional modules.
Wherein, the power management unit has the following two functions: firstly, the liquid crystal grating control module is responsible for providing required voltage of the liquid crystal grating control module; secondly, the waveform voltage output by the single chip microcomputer is increased to the waveform voltage required for controlling the driving electric field in the liquid crystal grating layer 14.
Aiming at the technical problem that the display device 100 in the prior art has poor display effect after being attached with an anti-peeping film, the first embodiment of the present application provides a display device 100, which includes a display layer 12 and a liquid crystal grating layer 14, wherein the display layer 12 is used for displaying images, the liquid crystal grating layer 14 is arranged in the light-emitting direction of the display layer 12, and guides out light emitted by the display layer 12 at a first visual angle or a second visual angle, and the angle range of the first visual angle is smaller than that of the second visual angle; above-mentioned display device 100 sets up liquid crystal grating layer 14 through the light-emitting direction at display layer 12, liquid crystal grating layer 14 makes the light that display layer 12 sent derives with first visual angle or second visual angle, thereby makes display device 100 can freely switch between peep-proof mode and non-peep-proof mode according to user's demand, and then when effectual protection user privacy, can not influence user experience again.
Example two
As shown in fig. 6, a schematic view of the display device 100 according to the second embodiment of the present application in the peep-proof mode is provided; as shown in fig. 7, a schematic view of the display device 100 according to the second embodiment of the present application in a non-peeping prevention mode is provided; as shown in fig. 8, a signal waveform diagram and a brightness waveform diagram of the display device 100 according to the second embodiment of the present application in the peep-proof mode and the non-peep-proof mode are respectively provided; the structure of the display device 100 in the second embodiment of the present application is the same as or similar to the structure of the display device 100 in the first embodiment of the present application, except that when the light emitted from the display layer 12 is led out at the first viewing angle, the driving voltage of the display layer 12 is a first voltage, and the luminance of the display layer 12 is a first luminance value; when the light emitted by the display layer 12 is led out at the second viewing angle, the driving voltage of the display layer 12 is a second voltage, and the brightness of the display layer 12 is a second brightness value;
wherein the first voltage is greater than the second voltage, and the first brightness value is equal to the second brightness value.
Specifically, after the display device 100 enters the peep-proof mode, the brightness of the display screen may decrease, which affects the user experience. Therefore, the first voltage is greater than the second voltage by adjusting the value of the brightness register in the liquid crystal grating control module, so that the first brightness value is equal to the second brightness value.
In this embodiment, taking the display screen brightness of the display device 100 when entering the non-peep-prevention mode as 450 nit (nit) as an example, the value of the corresponding brightness register is a, and the driving voltage of the display layer 12 is the second voltage at this time; when the display device 100 enters the peep-proof mode, the value of the brightness register corresponding to 450 nits is b, and the driving voltage of the display layer 12 is the first voltage.
Specifically, when the peep-proof mode signal is turned on, the on signal of the driving electric field formed by the driving electrode layer is within a first preset range, and the value of the brightness register is set to b, so as to enter the peep-proof mode, as shown in fig. 6 and 8. When the peep-proof mode signal is turned off, the on signal of the driving electric field formed by the driving electrode layer is within a second preset range, the value of the brightness register is adjusted to a, and the peep-proof mode exits, as shown in fig. 7 and 8.
Aiming at the technical problem that the display device 100 in the prior art has poor display effect after being attached with an anti-peeping film, the second embodiment of the present application provides a display device 100, which includes a display layer 12 and a liquid crystal grating layer 14, wherein the display layer 12 is used for displaying an image, the liquid crystal grating layer 14 is arranged in the light-emitting direction of the display layer 12, and guides out light emitted by the display layer 12 at a first visual angle or a second visual angle, the angle range of the first visual angle is smaller than that of the second visual angle, and meanwhile, the brightness of the display device 100 at the first visual angle is equal to that of the display device 100 at the second visual angle; above-mentioned display device 100 sets up liquid crystal grating layer 14 through the light-emitting direction at display layer 12, liquid crystal grating layer 14 makes the light that display layer 12 sent derives with first visual angle or second visual angle, thereby makes display device 100 can freely switch between peep-proof mode and non-peep-proof mode according to user's demand, and then when effectual protection user privacy, can not influence user experience again.
In addition, this embodiment compares this embodiment two, through in the flexible circuit board 15 the liquid crystal grating control module adjusts the numerical value of luminance register, makes display screen luminance when display device 100 is in the peep-proof mode keep unanimous with display screen luminance when display device 100 is in the non-peep-proof mode, further avoids influencing user experience.
Correspondingly, the embodiment of the application also provides a display method of the display device 100. Fig. 9 is a flowchart of a display method of the display device 100 according to an embodiment of the present disclosure. Wherein the method comprises the following steps:
s10, providing a display device 100; the display device 100 includes a display layer 12 for displaying an image and a liquid crystal grating layer 14 for guiding light emitted by the display layer 12 out at a first viewing angle or a second viewing angle, the liquid crystal grating layer 14 is disposed in a light-emitting direction of the display layer 12, and an angle range of the first viewing angle is smaller than an angle range of the second viewing angle;
s20, acquiring view configuration information of the display device 100;
s30, switching the visual angle of the display device 100 from the second angle to the first angle according to the angle configuration information.
Specifically, in S20, the step of acquiring the view angle configuration information of the display device 100 further includes:
and determining the view angle range of the light emitted by the display layer 12 according to the user requirement to obtain the view angle configuration information. When the user is in an environment of a person or in an environment such as a viewing screen which does not need to be peeped, the user does not need to be peeped, and the view angle configuration information is the second view angle; when a user is in a surrounding environment with a lot of people, or when using some software and needing an anti-peeping mode (for example, entering a mobile phone bank and other software with high privacy), the user has the anti-peeping requirement, and the view configuration information is the first view.
Further, in another embodiment of the present application, in S20, the step of acquiring the view angle configuration information of the display device 100 further includes:
the display device 100 automatically identifies the environment around the user through an infrared sensor or a distance sensor installed in the display device 100, and obtains the view configuration information of the display device 100.
In the above embodiments of the present application, the display screen of the display device 100 is equivalent to an intelligent anti-peeping display screen, and the intelligent anti-peeping display screen is obtained by adding the liquid crystal grating layer 14 to a traditional display screen. The application mode can be switched according to the application scene of the user: a peep-proof mode and a non-peep-proof mode. The current peep-proof membrane of pasting of contrast, there is following advantage:
firstly, under the peep-proof mode and the non-peep-proof mode, the user can freely switch the use mode according to the requirement. The privacy of the user can be effectively protected, and the user experience can not be influenced. Secondly, the fingerprint identification function of the mobile phone with the peep-proof film attached to the market at present is easy to lose efficacy, and the scheme can solve the problem.
The embodiment of the application provides a display device 100 and a display method; the display device 100 includes a display layer 12 and a liquid crystal grating layer 14, where the display layer 12 is configured to display an image, and the liquid crystal grating layer 14 is disposed in a light emitting direction of the display layer 12 and guides out light emitted by the display layer 12 at a first viewing angle or a second viewing angle, where an angle range of the first viewing angle is smaller than an angle range of the second viewing angle; above-mentioned display device 100 sets up liquid crystal grating layer 14 through the light-emitting direction at display layer 12, liquid crystal grating layer 14 makes the light that display layer 12 sent derives with first visual angle or second visual angle, thereby makes display device 100 can freely switch between peep-proof mode and non-peep-proof mode according to user's demand, and then when effectual protection user privacy, can not influence user experience again.
The display device 100 and the display method provided by the embodiments of the present application are described in detail above, and the principles and embodiments of the present application are described herein by applying specific examples, and the description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A display device, comprising:
a display layer for displaying an image;
the liquid crystal grating layer is arranged in the light emergent direction of the display layer and guides out the light rays emitted by the display layer at a first visual angle or a second visual angle;
wherein the angular range of the first perspective is less than the angular range of the second perspective.
2. The display device according to claim 1, wherein the liquid crystal grating layer comprises a liquid crystal layer and a first electrode layer and a second electrode layer located at two sides of the liquid crystal layer, and a driving electric field formed by the first electrode layer and the second electrode layer drives the liquid crystal layer to deflect;
when a driving electric field formed by the driving electrode layer is within a first preset range, the liquid crystal grating layer leads out emergent light of the display layer at a first visual angle; when a driving electric field formed by the driving electrode layer is within a second preset range, the emergent light of the display layer is led out by the liquid crystal grating layer at a second visual angle.
3. The display device according to claim 2, wherein the liquid crystal grating layer comprises a fingerprint identification area and a liquid crystal grating area arranged around the fingerprint identification area;
the liquid crystal molecule distribution density of the liquid crystal layer in the fingerprint identification area is smaller than that of the liquid crystal layer in the liquid crystal grating area.
4. The display device according to claim 3, wherein the driving electric field in the fingerprint identification region is within the second preset range when the display device receives a fingerprint identification signal.
5. The display device according to claim 1, further comprising a flexible circuit board, wherein the flexible circuit board further comprises:
the display control module is electrically connected with the display layer and is used for driving the display layer to emit light; and
and the liquid crystal grating control module is electrically connected with the liquid crystal grating layer and is used for controlling the driving electric field formed by the driving electrode layer to be switched from the second preset range to the first preset range.
6. The display device according to claim 5, wherein the liquid crystal grating control module comprises a signal control unit and a power management unit, the signal control unit is configured to output a signal waveform for turning on or off a driving electric field in the liquid crystal grating layer, and the power management unit is configured to provide a voltage to the liquid crystal grating control module.
7. The display device according to claim 1, wherein when the light emitted from the display layer is guided out at the first viewing angle, the driving voltage of the display layer is a first voltage, and the brightness of the display layer is a first brightness value; when the light emitted by the display layer is led out at the second visual angle, the driving voltage of the display layer is a second voltage, and the brightness of the display layer is a second brightness value;
wherein the first voltage is greater than the second voltage, and the first brightness value is equal to the second brightness value.
8. The display device according to claim 1, wherein the liquid crystal layer comprises a polymer network liquid crystal or a polymer dispersed liquid crystal.
9. A display method of a display device, comprising:
providing a display device; the display device comprises a display layer for displaying images and a liquid crystal grating layer for guiding light rays emitted by the display layer out at a first visual angle or a second visual angle, wherein the liquid crystal grating layer is arranged in the light emergent direction of the display layer, and the angle range of the first visual angle is smaller than that of the second visual angle;
acquiring visual angle configuration information of the display device;
and switching the visual angle of the display device from the second visual angle to the first visual angle according to the visual angle configuration information.
10. The method according to claim 9, wherein the step of acquiring the viewing angle configuration information of the display device further comprises:
and determining the visual angle range of the light rays emitted by the display layer according to the user requirements so as to obtain the visual angle configuration information.
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