[go: up one dir, main page]

CN115113450A - Display device and control method thereof - Google Patents

Display device and control method thereof Download PDF

Info

Publication number
CN115113450A
CN115113450A CN202110297024.8A CN202110297024A CN115113450A CN 115113450 A CN115113450 A CN 115113450A CN 202110297024 A CN202110297024 A CN 202110297024A CN 115113450 A CN115113450 A CN 115113450A
Authority
CN
China
Prior art keywords
proof
peep
electrode layer
display
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110297024.8A
Other languages
Chinese (zh)
Other versions
CN115113450B (en
Inventor
张新宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BOE Technology Group Co Ltd
Fuzhou BOE Optoelectronics Technology Co Ltd
Original Assignee
BOE Technology Group Co Ltd
Fuzhou BOE Optoelectronics Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BOE Technology Group Co Ltd, Fuzhou BOE Optoelectronics Technology Co Ltd filed Critical BOE Technology Group Co Ltd
Priority to CN202110297024.8A priority Critical patent/CN115113450B/en
Publication of CN115113450A publication Critical patent/CN115113450A/en
Application granted granted Critical
Publication of CN115113450B publication Critical patent/CN115113450B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/155—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—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
    • 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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Liquid Crystal (AREA)

Abstract

The display device comprises a backlight module, a peep-proof structure layer, a display panel and a control module, wherein the display panel is arranged on the light emergent side of the backlight module, the peep-proof structure layer is arranged between the backlight module and the display panel, the peep-proof structure layer comprises a plurality of peep-proof sub-structures, and each peep-proof sub-structure is connected with the control module; the control module is used for determining the local display area position information needing peep-proof display, and controlling the corresponding peep-proof substructure to work according to the local display area position information needing peep-proof display, so that local peep-proof is realized. Through setting up the peep-proof substructure, every peep-proof substructure can the independent control switch between peep-proof and sharing state for can carry out the peep-proof control through control module group local display area, realize that arbitrary display area's peep-proof switches with sharing demonstration.

Description

Display device and control method thereof
Technical Field
The embodiment of the disclosure relates to but is not limited to the technical field of display, and particularly relates to a display device and a control method thereof.
Background
With the continuous development of Display technology, Liquid Crystal Display (LCD) devices are widely used in various fields, which brings convenience to users in many aspects. Meanwhile, along with the popularization and application of display devices, information leakage is easily caused by personal privacy and business secrets, protection awareness of users on the personal privacy is increasingly strong, and more scenes need the display devices to have a peep-proof function.
Currently, implementations of related art privacy displays mainly include fixed, semi-fixed, and switchable. The switchable privacy display is generally switched between privacy protection in the entire display area and sharing in the entire display area.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present disclosure is to provide a display device and a control method thereof, so as to solve the problem that the prior art can only switch between the peep-prevention state and the sharing state in the whole display area.
In order to solve the technical problem, an embodiment of the present disclosure provides a display device, including a backlight module, a privacy protecting structure layer, a display panel and a control module, where the display panel is disposed on a light emitting side of the backlight module, the privacy protecting structure layer is disposed between the backlight module and the display panel, the privacy protecting structure layer includes a plurality of privacy protecting substructures, and each privacy protecting substructure is connected to the control module;
the control module is used for determining the local display area position information needing peeping display, and controlling the corresponding peeping-proof substructure to work according to the local display area position information needing peeping display, so that local peeping is realized.
In an exemplary embodiment, the control module comprises a controller and a driving circuit connected to the controller, wherein:
the controller is used for determining the position information of the local display area needing peeping display, determining the position of the corresponding peeping-proof substructure needing working according to the position information of the local display area needing peeping display, and controlling the driving circuit corresponding to the peeping-proof substructure needing working to work;
the driving circuit is used for driving the corresponding peep-proof substructure to work according to the control of the controller.
In an exemplary embodiment, the peep-proof sub-structure comprises a first electrode layer and a second electrode layer which are oppositely arranged, and a plurality of spacers arranged between the first electrode layer and the second electrode layer, wherein light-transmitting gaps are arranged between adjacent spacers, the spacers are made of electrochromic materials, the refractive index of the light-transmitting gap materials is the same as or close to that of the electrochromic materials, and the first electrode layer and the second electrode layer are connected with the driving circuit; or
The peep-proof sub-structure comprises a first spacing layer and a second spacing layer which are oppositely arranged, a first electrode layer and a second electrode layer which are arranged between the first spacing layer and the second spacing layer, and a plurality of spacing pieces which are arranged between the first electrode layer and the second spacing layer, wherein light-transmitting gaps are formed between the adjacent spacing pieces, the spacing pieces are made of electrochromic materials, the refractive index of the material of the light-transmitting gaps is the same as or close to that of the electrochromic materials, and the first electrode layer and the second electrode layer are connected with the driving circuit.
In an exemplary embodiment, the privacy sub-structure includes a louver structure layer and a switching film disposed at a side of the louver structure layer close to the display panel, wherein:
the louver structure layer comprises a first spacing layer, a second spacing layer and a plurality of lighttight spacers, wherein the first spacing layer and the second spacing layer are arranged oppositely, the plurality of lighttight spacers are arranged between the first spacing layer and the second spacing layer, and a light-transmitting gap is formed between every two adjacent spacers;
the switching film is used for switching between a peep-proof mode and a sharing mode according to the control of the control module.
In an exemplary embodiment, the switching film comprises a polymer-dispersed liquid crystal film; the polymer dispersed liquid crystal film comprises a third electrode layer, a fourth electrode layer and a polymer liquid crystal layer, wherein the third electrode layer and the fourth electrode layer are oppositely arranged, and the polymer liquid crystal layer is arranged between the third electrode layer and the fourth electrode layer; or the polymer dispersed liquid crystal film comprises a first substrate and a second substrate which are oppositely arranged, and a third electrode layer, a polymer liquid crystal layer and a fourth electrode layer which are arranged between the first substrate and the second substrate, wherein the third electrode layer is arranged on the side of the first substrate facing the second substrate, the fourth electrode layer is arranged on the side of the second substrate facing the first substrate, and the polymer liquid crystal layer is arranged between the third electrode layer and the fourth electrode layer;
the control module comprises a controller and a driving circuit connected with the controller, and the third electrode layer and the fourth electrode layer are connected with the driving circuit in the control module.
In an exemplary embodiment, one driving circuit drives one privacy substructure or a plurality of privacy substructures.
The embodiment of the present disclosure further provides a control method of a display device, where the display device is the display device in the foregoing embodiment, and the control method includes:
determining the position information of a local display area needing peep-proof display;
and controlling the corresponding peep-proof substructure to work according to the position information of the local display area needing peep-proof display, so as to realize local peep-proof.
In an exemplary embodiment, the determining the local display area position information needing the peep-proof display includes one or more of the following modes:
taking the position information appointed by the user as the position information of the local display area needing peep-proof display;
determining the position of a local display area needing peep-proof display according to the display content, so as to determine the position information of the local display area needing peep-proof display;
and determining the position of the local display area needing peep-proof display according to the position of human eyes, so as to determine the position information of the local display area needing peep-proof display.
In an exemplary embodiment, the controlling the corresponding peep-proof substructure according to the local display area position information needing peep-proof display includes:
and determining the position of the corresponding peep-proof substructure needing to work according to the position information of the local display area needing to be peeped and displayed, and sending a starting signal to a driving circuit corresponding to the peep-proof substructure needing to work so that the driving circuit loads an electric signal to the peep-proof substructure needing to work.
According to the display device and the control method provided by the embodiment of the disclosure, by arranging the peep-proof substructures, each peep-proof substructure can independently control switching between the peep-proof state and the shared state, so that the local display area can be subjected to peep-proof control through the control module, and switching between peeping-proof state and shared display in any display area is realized.
Drawings
The drawings are intended to provide an understanding of the present disclosure, and are to be considered as forming a part of the specification, and are to be used together with the embodiments of the present disclosure to explain the present disclosure without limiting the present disclosure.
FIG. 1 is a schematic view of a side view angle of a privacy display device;
fig. 2 is a schematic structural diagram of a display device according to an exemplary embodiment of the present disclosure;
fig. 3 is a top view of a display device according to exemplary embodiment 3 of the present disclosure;
fig. 4 is a schematic connection diagram of a peep-proof sub-structure and a driving circuit according to an exemplary embodiment of the present disclosure;
FIG. 5 is a schematic view of a peep-proof structure according to an exemplary embodiment of the present disclosure;
FIG. 6 is a schematic view of another exemplary embodiment of the present disclosure;
FIG. 7 is a schematic view of another exemplary embodiment of the present disclosure;
fig. 8 is a flowchart of a control method of an exemplary embodiment of the present disclosure.
Description of reference numerals:
100-a backlight module; 200-peep-proof structural layer; 300 — a display panel;
201 — a first electrode layer; 202 — a second electrode layer; 203-spacers;
210-a blind structural layer; 211-first spacer layer 212-second spacer layer;
213-spacer 220-switching film; 221-a third electrode layer;
222 — a fourth electrode layer; 223-polymer liquid crystal layer.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can readily appreciate the fact that the forms and details may be varied into a variety of forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the contents described in the following embodiments. The embodiments and features of the embodiments in the present disclosure may be arbitrarily combined with each other without conflict.
In the drawings, the size of each component, the thickness of a layer, or a region may be exaggerated for clarity. Therefore, one aspect of the present disclosure is not necessarily limited to the dimensions, and the shapes and sizes of the respective components in the drawings do not reflect a true scale. Further, the drawings schematically show ideal examples, and one embodiment of the present disclosure is not limited to the shapes, numerical values, and the like shown in the drawings.
The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.
In this specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships are used to explain positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words described in the specification are not limited to the words described in the specification, and may be replaced as appropriate.
In this specification, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited. For example, it may be a fixed connection, or a removable connection, or an integral connection; can be a mechanical connection, or an electrical connection; either directly or indirectly through intervening components, or both may be interconnected. The meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In this specification, "electrically connected" includes a case where constituent elements are connected together by an element having some kind of electrical action. The "element having a certain electric function" is not particularly limited as long as it can transmit and receive an electric signal between connected components. Examples of the "element having some kind of electric function" include not only an electrode and a wiring but also a switching element such as a transistor, a resistor, an inductor, a capacitor, other elements having various functions, and the like.
In the present specification, "film" and "layer" may be interchanged with each other. For example, the "conductive layer" may be sometimes replaced with a "conductive film". Similarly, the "insulating film" may be replaced with an "insulating layer".
Fig. 1 is a schematic view of a side view angle of a privacy display device for privacy protection. As shown in fig. 1, the wide viewing angle of the display device can be changed into the narrow viewing angle by controlling the angle of the emergent light, so that the main viewer who is located within the peep-proof viewing angle range can clearly see the display image, and other viewers outside the peep-proof viewing angle range cannot see the display image, thereby realizing the peep-proof at the side viewing angle. The peep-proof viewing angle β is an angle corresponding to a viewing angle brightness reduced to 2% of the central brightness, and may be about 15 degrees to 40 degrees, and may be adjusted by using a collimated backlight in combination with a liquid crystal display panel or a common backlight in combination with a peep-proof liquid crystal display panel.
Since the current peep-proof display generally adopts peep-proof display in the whole display area or share the whole display area, the requirements that a user wants to perform peep-proof display on part of display contents and share and display part of the contents are not considered, so that the functions can not be realized, and the experience of the user is poor.
Fig. 2 is a schematic structural diagram of a display device according to an exemplary embodiment of the disclosure. As shown in fig. 2, in an exemplary embodiment, a display device may include a backlight module 100, a privacy protecting structure layer 200, a display panel 300 and a control module (not shown), wherein the display panel 300 is disposed on a light emitting side of the backlight module 100, the privacy protecting structure layer 200 is disposed between the backlight module 100 and the display panel 300, the privacy protecting structure layer 200 includes a plurality of privacy protecting sub-structures, and each privacy protecting sub-structure is connected to the control module. The control module is used for determining the local display area position information needing peeping display, and controlling the corresponding peeping-proof substructure to work according to the local display area position information needing peeping display, so that local peeping is realized.
Fig. 3 is a top view of a display device according to an exemplary embodiment of the disclosure, where the location and size of the privacy zone are merely examples. Divide into the peep-proof substructure of a plurality of independent control with the peep-proof structure in this embodiment, the quantity of peep-proof substructure can set up according to actual need, and the quantity of peep-proof substructure is more, and the local display area that can control is more meticulous, can satisfy customer's demand more.
Through setting up peep-proof substructure, every peep-proof substructure can the independent control switch between peep-proof and sharing state for can carry out peep-proof control through control module group local display area, realize that arbitrary display area's peep-proof switches with sharing demonstration.
In an exemplary embodiment, the backlight module 100 is used for emitting light, and the display panel 300 is used for displaying a picture. In an exemplary embodiment, the display panel 300 may employ a liquid crystal display structure mature in related art. For example, the display panel may include an array substrate and a color film substrate which are oppositely arranged, and the liquid crystal molecules are filled between the array substrate and the curved film substrate. The array substrate can comprise a thin film transistor and a pixel electrode, the color film substrate can comprise a color film layer and a common electrode, and the array substrate and the color film substrate form an electric field for driving liquid crystal to deflect so as to realize gray scale display. In an exemplary embodiment, the display panel may be a Twisted Nematic (TN) display mode, an Advanced Super Dimension Switch (ADS) display mode, an In Plane Switching (IPS) display mode, or a Fringe Field Switching (FFS) display mode, which is not limited herein.
In an exemplary embodiment, the backlight module 100 and the privacy protecting layer 200 may form a collimating backlight structure, wherein the backlight module 100 is configured to emit light rays with a wide viewing angle, the privacy protecting layer 200 is configured to process the light rays emitted from the backlight module 100 to form collimated light rays, and the backlight module 100 and the privacy protecting layer 200 together form a collimating backlight device configured to emit the collimated light rays. Through adjusting emergent ray, make most emergent ray restriction in the peep-proof angle, the viewer can only see display panel's display picture clearly in the visual angle scope at the peep-proof angle, realizes the peep-proof function.
This is disclosed through set up between backlight unit and display panel and contain the peep-proof substructure that can independent control, can control local peep-proof substructure through the control module group to realize local peep-proof. Because the light emitted by the peep-proof substructure has a narrow visual angle, and the light penetrates through the display panel, the picture of the partial display area has a certain visual angle visual area, so that a viewer positioned in the visual angle visual area can clearly see the display picture, and a viewer positioned outside the visual angle visual area can not see the display picture, thereby realizing lateral visual angle peep-proof. The side view peep-proof means that the main viewer can see the display picture of the display panel at a normal position, and other viewers at two sides of the main viewer cannot see the display picture of the display panel.
In an exemplary embodiment, the control module comprises a controller and a driving circuit connected to the controller, wherein:
the controller is used for determining the position information of the local display area needing peeping display, determining the position of the corresponding peeping-proof substructure needing working according to the position information of the local display area needing peeping display, and controlling the driving circuit corresponding to the peeping-proof substructure needing working to work;
the driving circuit is used for driving the corresponding peep-proof substructure to work according to the control of the controller.
In an exemplary embodiment, the driving circuit may adopt a driving circuit structure mature in the related art.
In an exemplary embodiment, the controller may include:
the position determining unit is used for determining the position information of the local display area needing peeping-proof display and determining the position of the corresponding peeping-proof substructure needing working according to the position information of the local display area needing peeping-proof display; and
and the driving unit is used for controlling the driving circuit corresponding to the peep-proof substructure to work.
The position determining unit can determine the position information of the local display area needing peep-proof display according to the specified area of the user, or determine the position information of the local display area needing peep-proof display according to the display content, or determine the position information of the local display area needing peep-proof display according to the position of human eyes, convert the determined position information of the local display area into the position of the corresponding peep-proof substructure, and apply an electric field to the corresponding peep-proof substructure through the driving circuit to enable the peep-proof substructure to work, so that the effect of local peep-proof display is achieved. The specific implementation of the position determination unit can be seen in the description of the control method.
In an exemplary embodiment, the position determining unit is further configured to send a stop signal to a driving circuit corresponding to the active peep-proof substructure, so that the driving circuit stops loading the electric signal to the peep-proof substructure.
The local display area can be switched between the peep-proof state and the sharing state by controlling the partial peep-proof substructure to work through the driving circuit. In an exemplary embodiment, one driving circuit may drive one or more peep-proof sub-structures, as shown in fig. 4, which is a schematic connection diagram of one peep-proof sub-structure and a driving circuit, electrodes of each peep-proof sub-structure are independently arranged and independently wired, and switching of a peep-proof state and a shared state of a single peep-proof sub-structure may be achieved in a manner of independently loading an electric field.
Fig. 5 is a schematic view of a peep-proof structure according to an exemplary embodiment of the present disclosure. As shown in fig. 5, in an exemplary embodiment, any one of the privacy sub-structures includes a first electrode layer 201 and a second electrode layer 202 disposed opposite to each other, and a plurality of spacers 203 disposed between the first electrode layer 201 and the second electrode layer 202, light-transmitting gaps are provided between adjacent spacers 203, the spacers 203 may be made of an electrochromic material, the refractive index of the light-transmitting gap material is the same as or close to the refractive index of the electrochromic material, and the first electrode layer 201 and the second electrode layer 202 are connected to the driving circuit.
In an exemplary embodiment, the light-transmitting gap may be filled with a transparent resin material, that is, the transparent resin material and the electrochromic material are spaced apart. The light emitted from the backlight module forms collimated light by forming a louver structure (or called a grating structure) through the opaque spacers and the transparent gaps. The gap is filled with a light-transmitting material with the same or similar refractive index as the electrochromic material, so that the display effect in a shared state can be ensured.
In an exemplary embodiment, the first electrode layer 201 and the second electrode layer 202 may be formed of indium tin oxide, nano silver wire, metal mesh, carbon nanotube, or graphene.
In an exemplary embodiment, the peep-proof structure can be attached to the backlight module through the optical cement, and the display panel can be attached to one side of the peep-proof structure, which is far away from the backlight module, through the optical cement.
Electrochromism refers to a phenomenon that optical properties (such as reflectivity, transmittance and absorptivity) of a material generate stable and reversible color change under the action of an external electric field, and the electrochromism is represented by reversible change of color and transmittance in appearance. Materials with electrochromic properties are referred to as electrochromic materials. The electrochromic material layer may include an inorganic metal oxide. For example, tungsten oxide (WO3), niobium oxide (Nb2O5), titanium oxide (TiO2), molybdenum oxide (MoO3), copper oxide (CuO), chromium oxide (Cr2O3), manganese oxide (Mn2O3), vanadium oxide (V2O5), cobalt oxide (Co2O3), nickel oxide (Ni2O3), or the like may be used, or lithium, sodium, potassium, vanadium, or titanium-doped inorganic metal oxides described above, or a mixture of lithium, sodium, potassium, vanadium, or titanium-doped inorganic metal oxides may be used. The inorganic metal oxide has a good electrochromic effect, and the electrochromic color of the electrochromic material layer can be controlled by selecting different inorganic metal oxides. In this embodiment, an electrochromic material having a high transmittance may be selected. When the backlight module is in a shared state, voltage is not applied to the peep-proof substructure prepared from the electrochromic material, the light transmittance of the spacer made of the electrochromic material is high, the spacer is in a fully transparent state, emergent light of the backlight module can be emitted normally, and human eyes on the display side of the display panel can see display contents clearly. When in the peep-proof state, apply voltage to the peep-proof substructure that is prepared by electrochromic material, the luminousness of the spacer that electrochromic material made reduces, become complete opaque state, make peep-proof substructure form shutter optical structure or grating structure through opaque spacer, when the light of backlight unit outgoing gets into peep-proof substructure, the light that the light angle is greater than peep-proof visual angle is blocked by shutter optical structure or grating structure, only the light that the light angle is less than peep-proof visual angle passes through, and incite to display panel, reduce visual angle promptly, make the viewer who is located outside the visual regional scope of visual angle can't see the display screen, realize peep-proof.
In an exemplary embodiment, the first spacer layer may be disposed on a side of the first electrode layer away from the second electrode layer, and the second spacer layer may be disposed on a side of the second electrode layer away from the first electrode layer, so as to support and protect the electrode layers. At this moment, the peep-proof sub-structure comprises a first spacing layer and a second spacing layer which are oppositely arranged, a first electrode layer and a second electrode layer which are arranged between the first spacing layer and the second spacing layer, and a plurality of spacing pieces which are arranged between the first electrode layer and the second spacing layer, wherein a light-transmitting gap is arranged between the adjacent spacing pieces, the spacing pieces are made of electrochromic materials, the refractive index of the material of the light-transmitting gap is the same as or similar to that of the electrochromic materials, and the first electrode layer and the second electrode layer are connected with the driving circuit.
Fig. 6 is a schematic view of another peep-proof structure according to an exemplary embodiment of the present disclosure. As shown in fig. 6, in an exemplary embodiment, any one of the privacy sub-structures includes a louver structure layer 210 and a switching film 220, the switching film 220 is disposed on a side of the louver structure layer 210 close to the display panel, wherein:
the louver structure layer 210 includes a first spacing layer 211 and a second spacing layer 212 which are oppositely arranged, and a plurality of light-tight spacers 213 which are arranged between the first spacing layer and the second spacing layer, wherein light-tight gaps are arranged between adjacent spacers;
the switching film 220 is used to switch between the peep prevention mode and the sharing mode according to the control of the control module.
In an exemplary embodiment, the opaque spacers and the light-transmitting gaps form a louver structure (or a grating structure), so that the light emitted from the backlight module forms collimated light. The gaps of the louver structure layer can be filled with transparent resin materials to form light-transmitting gaps. The filling of the transparent material can make the structure more stable.
In an exemplary embodiment, the switching film may be a Polymer Dispersed Liquid Crystal (PDLC) film, which has a lower threshold voltage and saturation voltage, a faster response time, and a higher contrast ratio. The polymer dispersed liquid crystal film is formed by filling liquid crystal in a mesh of a three-dimensional network structure formed by an organic solid polymer matrix in micro-scale small droplets, and the polymer dispersed liquid crystal film is in a transparent state when an electric field is applied to adjust the optical axis orientation of the liquid crystal droplets so that the refractive index of the liquid crystal droplets is matched with that of the organic solid polymer matrix. When no electric field exists, because the optical axis of the small droplets composed of liquid crystal molecules is in free orientation and the refractive index of the small droplets is not matched with that of the organic solid polymer matrix, light is reflected and refracted multiple times on the interface between the liquid crystal and the organic solid polymer matrix, so that the light is strongly scattered when passing through the polymer dispersed liquid crystal film, and the polymer dispersed liquid crystal film is in a semi-transparent state or a milky white state.
In an exemplary embodiment, as shown in fig. 7, the polymer dispersed liquid crystal film includes a third electrode layer 221, a fourth electrode layer 222, which are oppositely disposed, and a polymer liquid crystal layer 223 disposed between the third electrode layer 221 and the fourth electrode layer 222; the control module comprises a controller and a driving circuit connected with the controller, and the third electrode layer and the fourth electrode layer are connected with the driving circuit in the control module.
The third electrode layer 221 and the fourth electrode layer 222 may be made of indium tin oxide, nano silver wire, metal grid, carbon nanotube or graphene, and the polymer liquid crystal layer 223 may be nematic liquid crystal droplets uniformly dispersed in a polymer matrix.
In an exemplary embodiment, the third electrode layer and the fourth electrode layer may be respectively disposed on the substrates, in which case the polymer dispersed liquid crystal film includes a first substrate and a second substrate disposed opposite to each other, and a third electrode layer, a polymer liquid crystal layer, and a fourth electrode layer disposed between the first substrate and the second substrate, the third electrode layer being disposed on a side of the first substrate facing the second substrate, the fourth electrode layer being disposed on a side of the second substrate facing the first substrate, the polymer liquid crystal layer being disposed between the third electrode layer and the fourth electrode layer.
In an exemplary embodiment, the first substrate and the second substrate may be glass or plastic, etc.
In an exemplary embodiment, the switching film may be attached to the privacy protecting structure through an optical adhesive, and the display panel may be attached to a side of the privacy protecting structure away from the backlight module through the optical adhesive.
In an exemplary embodiment, the refractive index of the polymer liquid crystal layer may be controlled by an electric field applied between the third electrode layer and the fourth electrode layer, so as to switch between a transparent state and a scattering state, thereby implementing a switching function. For example, when no voltage is applied to the third electrode layer and the fourth electrode layer, the liquid crystal particles are randomly oriented in the optical axis direction and in a disordered state due to no voltage difference between the two electrode layers, and the effective refractive index no of the liquid crystal particles is not matched with the refractive index np of the polymer, so that the incident light is strongly scattered, which is called a PDLC scattering state. When voltage is applied to the third electrode layer and the fourth electrode layer, a voltage difference exists between the electrode layers, the optical axis of the liquid crystal particles is consistent with the direction of an electric field, the refractive index no of the liquid crystal particles is basically matched with the refractive index np of the polymer to form a uniform medium approximately, so that incident light is not scattered, and the polymer dispersed liquid crystal film is in a transparent state, namely a PDLC transparent state.
In this embodiment, the polymer dispersed liquid crystal film is disposed between the louver structure layer and the display panel. When the polymer dispersed liquid crystal film is in a transparent state (a voltage difference exists between a third electrode layer and a fourth electrode layer in the polymer dispersed liquid crystal film), narrow-viewing-angle light rays formed by emergent light of the backlight module through the louver structure are not changed after passing through the polymer dispersed liquid crystal film, the narrow-viewing-angle light rays are still narrow-viewing-angle light rays, and at the moment, the polymer dispersed liquid crystal film is in a peep-proof mode and has a side viewing angle peep-proof function. When the polymer dispersed liquid crystal film is in a scattering state (no voltage difference exists between the third electrode layer and the fourth electrode layer in the polymer dispersed liquid crystal film), in the process that light emitted by the backlight module passes through the polymer dispersed liquid crystal film through narrow-viewing-angle light formed by the louver structure, the light is strongly scattered, so that the light leaving the polymer dispersed liquid crystal film is changed into wide-viewing-angle light, and at the moment, the polymer dispersed liquid crystal film is in a sharing mode, and side-viewing-angle peep prevention is not available.
In an exemplary embodiment, the switching film of the present disclosure may adopt other structures capable of switching between transparent and scattering, and the present disclosure is not limited thereto.
In an exemplary embodiment, the backlight assembly 100 may adopt a backlight structure mature in the related art. For example, the backlight module may include a light guide plate, an optical film is disposed on a light emitting surface of the light guide plate, a light source is disposed on a light incident surface of the light guide plate, and the light guide plate converts a point light source or a line light source generated by the light source into a surface light source, and the surface light source is enhanced by the optical film and then emits the light to the peep-proof structure layer.
In an exemplary embodiment, the privacy protecting layer 200 may also adopt a privacy protecting structure mature in the related art.
Fig. 8 is a peep prevention control method for a display device in an embodiment of the present disclosure, including:
step 801, determining local display area position information needing peep-proof display;
and step 802, controlling the corresponding peep-proof substructure to work according to the local display area position information needing peep-proof display, so as to realize local peep-proof.
In step 801, the determining of the local display area position information that needs to be displayed in a peep-proof manner may adopt one or more of the following manners:
the method comprises the steps that firstly, position information appointed by a user is used as position information of a local display area needing peep-proof display;
for example, the user may specify in advance which part of the display area needs to be displayed in a peep-proof manner, and acquire the position information specified by the user as the position information of the local display area that needs to be displayed in a peep-proof manner.
The location information includes, but is not limited to, coordinates, or coordinates and shape, of the local display area to be peered.
Determining the position of the local display area needing peep-proof display according to the display content, and determining the position information of the local display area needing peep-proof display;
for example, the privacy level (or privacy level) of an application or operation may be preset by a user or set by the system, such as the privacy level of a network banking application being higher than the privacy level of other applications, and such as operations involving private content being higher than the privacy level of other operations. When the application program with the high privacy level is opened, the position of the display area where the application program window is located is the position of the local display area needing peep-proof display, and the position information of the local display area needing peep-proof display is determined according to the position of the window. When the operation with high privacy level is executed, the position of the display area where the operation window is located is the position of the local display area needing peep-proof display, and the position information of the local display area needing peep-proof display is determined according to the position of the window. The operation with a high privacy level may be, for example, an operation of inputting a password, an operation of inputting personal information of a user, an operation of pushing a personal message (for example, an operation of pushing a WeChat message or a short message), or other operations related to privacy, where a keyboard window for inputting a password, a keyboard and a display window for inputting personal information, a push window, and the like are operation windows with a high privacy level.
When there is no display content that requires privacy viewing,
and determining the position of the local display area needing peep-proof display according to the position of human eyes so as to determine the position information of the local display area needing peep-proof display.
For example, the following steps may be employed:
step 8011, determining that the user is legal according to face recognition;
the face image of the user can be shot through an image acquisition device on the equipment, and whether the user is a legal user or not is judged by comparing the face image with the face image of the legal user which is stored in advance.
Step 8012, the positions of the eyes of the user are determined, the position of the gazing area of the display screen is determined according to the positions of the eyes, the position of the gazing area is the position of the local display area needing peeping-proof display, and the position information of the local display area needing peeping-proof display is determined according to the position of the gazing area.
When the human eyes watch the screen, the eyes can watch a certain area on the screen, which is called a gazing area. The gazing zone may be a viewpoint area or an area within a predetermined range including a viewpoint.
The first mode, the second mode and the third mode can be executed alternatively, any two of the modes can be selected simultaneously, or the three modes can be selected simultaneously.
In step 802, the position of the corresponding peep-proof substructure to be operated is determined according to the position information of the local display area to be peeped-proof displayed, and a start signal is sent to the driving circuit corresponding to the peep-proof substructure to be operated, so that the driving circuit loads an electrical signal to the peep-proof substructure to be operated.
In an exemplary embodiment, the method further includes, when the peep-proof display is not required, controlling the peep-proof substructure to stop operating, for example, sending a stop signal to a driving circuit corresponding to the active peep-proof substructure, so that the driving circuit stops loading the electrical signal to the peep-proof substructure.
The peep-proof substructure capable of being independently controlled is arranged, local peep-proof can be achieved, switching between peep-proof and sharing can be achieved, the requirements of different scenes can be met, user experience is improved, and the application prospect is good. The local peep-proof effect can meet the privacy protection requirement of the current bank cash dispenser, business notebook or business display.
It should be noted that the display device according to the exemplary embodiment of the disclosure is merely an example, and the corresponding structure and the relative position thereof may be adjusted according to actual needs in actual implementation. For example, the display panel and the peep-proof film may be provided as an integral structure, and the disclosure is not limited thereto.
In the exemplary embodiment of the present disclosure, the display device may be 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, and a navigator.
Although the embodiments disclosed in the present disclosure are described above, the descriptions are only for the convenience of understanding the present disclosure, and are not intended to limit the present disclosure. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the present disclosure is to be limited only by the terms of the appended claims.

Claims (10)

1. A display device is characterized by comprising a backlight module, a peep-proof structure layer, a display panel and a control module, wherein the display panel is arranged on the light-emitting side of the backlight module, the peep-proof structure layer is arranged between the backlight module and the display panel, the peep-proof structure layer comprises a plurality of peep-proof sub-structures, and each peep-proof sub-structure is connected with the control module;
the control module is used for determining the local display area position information needing peeping display, and controlling the corresponding peeping-proof substructure to work according to the local display area position information needing peeping display, so that local peeping is realized.
2. The display device according to claim 1, wherein the control module comprises a controller and a driving circuit connected to the controller, wherein:
the controller is used for determining the position information of the local display area needing peeping display, determining the position of the corresponding peeping-proof substructure needing working according to the position information of the local display area needing peeping display, and controlling the driving circuit corresponding to the peeping-proof substructure needing working to work;
the driving circuit is used for driving the corresponding peep-proof substructure to work according to the control of the controller.
3. The display device according to claim 2, wherein:
the peep-proof substructure comprises a first electrode layer and a second electrode layer which are oppositely arranged, and a plurality of spacers arranged between the first electrode layer and the second electrode layer, wherein a light-transmitting gap is formed between every two adjacent spacers, the spacers are made of electrochromic materials, the refractive index of the material of the light-transmitting gap is the same as or close to that of the electrochromic materials, and the first electrode layer and the second electrode layer are connected with the driving circuit; or
The peep-proof sub-structure comprises a first spacing layer, a second spacing layer, a first electrode layer, a second electrode layer and a plurality of spacing pieces, wherein the first spacing layer and the second spacing layer are oppositely arranged, the first electrode layer and the second electrode layer are arranged between the first spacing layer and the second spacing layer, the spacing pieces are arranged between the first electrode layer and the second spacing layer, light-transmitting gaps are arranged between the adjacent spacing pieces, the spacing pieces are made of electrochromic materials, the refractive index of the light-transmitting gap materials is the same as or close to that of the electrochromic materials, and the first electrode layer and the second electrode layer are connected with a driving circuit.
4. The display device according to claim 1, wherein the privacy substructure comprises a louver structure layer and a switching film disposed on a side of the louver structure layer adjacent to the display panel, wherein:
the louver structure layer comprises a first spacing layer, a second spacing layer and a plurality of lighttight spacers, wherein the first spacing layer and the second spacing layer are arranged oppositely, the plurality of lighttight spacers are arranged between the first spacing layer and the second spacing layer, and a light-transmitting gap is formed between every two adjacent spacers;
the switching film is used for switching between a peep-proof mode and a sharing mode according to the control of the control module.
5. The display device according to claim 4, wherein the switching film comprises a polymer-dispersed liquid crystal film; the polymer dispersed liquid crystal film comprises a third electrode layer, a fourth electrode layer and a polymer liquid crystal layer, wherein the third electrode layer and the fourth electrode layer are oppositely arranged, and the polymer liquid crystal layer is arranged between the third electrode layer and the fourth electrode layer; or the polymer dispersed liquid crystal film comprises a first substrate and a second substrate which are oppositely arranged, and a third electrode layer, a polymer liquid crystal layer and a fourth electrode layer which are arranged between the first substrate and the second substrate, wherein the third electrode layer is arranged on the side of the first substrate facing the second substrate, the fourth electrode layer is arranged on the side of the second substrate facing the first substrate, and the polymer liquid crystal layer is arranged between the third electrode layer and the fourth electrode layer;
the control module comprises a controller and a driving circuit connected with the controller, and the third electrode layer and the fourth electrode layer are connected with the driving circuit in the control module.
6. The display device according to claim 3 or 5,
a drive circuit drives the peep-proof substructure or the peep-proof substructures.
7. The control method of the display device is characterized in that the display device comprises a backlight module, a peep-proof structure layer, a display panel and a control module, wherein the display panel is arranged on the light-emitting side of the backlight module, the peep-proof structure layer is arranged between the backlight module and the display panel, the peep-proof structure layer comprises a plurality of peep-proof sub-structures, and each peep-proof sub-structure is connected with the control module; the control method comprises the following steps:
determining the position information of a local display area needing peep-proof display;
and controlling the corresponding peep-proof substructure to work according to the local display area position information needing peep-proof display, so as to realize local peep-proof.
8. The control method according to claim 7, wherein the determining the local display area position information needing the peep-proof display comprises one or more of the following modes:
taking the position information appointed by the user as the position information of the local display area needing peeping-proof display;
determining the position of a local display area needing peep-proof display according to the display content, so as to determine the position information of the local display area needing peep-proof display;
and determining the position of the local display area needing peep-proof display according to the position of human eyes, so as to determine the position information of the local display area needing peep-proof display.
9. The control method according to claim 7, wherein the controlling the corresponding peep-proof substructure to operate according to the local display area position information needing peep-proof display comprises:
and determining the position of the corresponding peep-proof substructure needing to work according to the position information of the local display area needing to be peeped and displayed, and sending a starting signal to a driving circuit corresponding to the peep-proof substructure needing to work so that the driving circuit loads an electric signal to the peep-proof substructure needing to work.
10. The control method according to claim 7, characterized in that the method further comprises:
when the peep-proof display is not needed, the peep-proof substructure is controlled to stop working.
CN202110297024.8A 2021-03-19 2021-03-19 Display device and control method thereof Active CN115113450B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110297024.8A CN115113450B (en) 2021-03-19 2021-03-19 Display device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110297024.8A CN115113450B (en) 2021-03-19 2021-03-19 Display device and control method thereof

Publications (2)

Publication Number Publication Date
CN115113450A true CN115113450A (en) 2022-09-27
CN115113450B CN115113450B (en) 2024-05-31

Family

ID=83324438

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110297024.8A Active CN115113450B (en) 2021-03-19 2021-03-19 Display device and control method thereof

Country Status (1)

Country Link
CN (1) CN115113450B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115657365A (en) * 2022-10-28 2023-01-31 维沃移动通信有限公司 Display panel, electronic equipment and peep-proof control method thereof
CN116033780A (en) * 2023-03-10 2023-04-28 上海天马微电子有限公司 Display module and display device
CN116088224A (en) * 2023-02-27 2023-05-09 惠科股份有限公司 Backlight module, display device and display driving method
CN116360134A (en) * 2023-03-27 2023-06-30 上海天马微电子有限公司 Display module, display device and driving method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204790254U (en) * 2015-05-05 2015-11-18 上海冠显光电科技有限公司 Changeable peep -proof liquid crystal disply device of separated regions control
CN106249492A (en) * 2016-10-12 2016-12-21 京东方科技集团股份有限公司 Display device and method of work thereof
CN206057732U (en) * 2016-08-30 2017-03-29 苏州汉朗光电有限公司 A kind of peep-proof display
CN106802499A (en) * 2016-08-30 2017-06-06 苏州汉朗光电有限公司 Peep-proof display
CN109918953A (en) * 2018-09-27 2019-06-21 用友网络科技股份有限公司 A kind of display methods and device of key message peep-proof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204790254U (en) * 2015-05-05 2015-11-18 上海冠显光电科技有限公司 Changeable peep -proof liquid crystal disply device of separated regions control
CN206057732U (en) * 2016-08-30 2017-03-29 苏州汉朗光电有限公司 A kind of peep-proof display
CN106802499A (en) * 2016-08-30 2017-06-06 苏州汉朗光电有限公司 Peep-proof display
CN106249492A (en) * 2016-10-12 2016-12-21 京东方科技集团股份有限公司 Display device and method of work thereof
CN109918953A (en) * 2018-09-27 2019-06-21 用友网络科技股份有限公司 A kind of display methods and device of key message peep-proof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115657365A (en) * 2022-10-28 2023-01-31 维沃移动通信有限公司 Display panel, electronic equipment and peep-proof control method thereof
CN116088224A (en) * 2023-02-27 2023-05-09 惠科股份有限公司 Backlight module, display device and display driving method
US11876082B1 (en) 2023-02-27 2024-01-16 HKC Corporation Limited Backlight circuit, displaying device and displaying driving method
CN116033780A (en) * 2023-03-10 2023-04-28 上海天马微电子有限公司 Display module and display device
CN116360134A (en) * 2023-03-27 2023-06-30 上海天马微电子有限公司 Display module, display device and driving method thereof

Also Published As

Publication number Publication date
CN115113450B (en) 2024-05-31

Similar Documents

Publication Publication Date Title
CN115113450B (en) Display device and control method thereof
US10578895B2 (en) Light ray direction controlling device and display device
TWI269914B (en) Liquid crystal display device
US9766494B2 (en) Double-faced display panel and manufacturing method thereof
CN205176423U (en) Liquid crystal display module with peep -proof and electromagnetic shielding function
JP2015187620A (en) display device
JP2007047229A (en) Variable viewing angle liquid crystal display device, method and terminal
US11119355B2 (en) Electro-optical device
CN104932110B (en) Display device
CN214225625U (en) Display device
CN108828835B (en) Color film substrate, liquid crystal display device and driving method thereof
CN107636521B (en) Device with polymer dispersed liquid crystal
CN111025733A (en) Display module and display device
CN113917721A (en) Display panel with switchable wide and narrow viewing angles, driving method and display device
US20080266471A1 (en) Liquid-crystal display apparatus
KR100998695B1 (en) Display device with adjustable viewing angle
CN112198709A (en) Liquid crystal display device and driving method thereof
CN216351637U (en) Display panel and display device
CN109814248B (en) Display device and control method thereof
TWI663536B (en) Electronic writing board
CN113641016B (en) display device
JP2020087186A (en) Electronic device
WO2009094944A1 (en) Displaying apparatus
CN112859445B (en) Display device
CN113341608A (en) Display device and electronic apparatus

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant