CN110098241B - Display panel, control method thereof and display device - Google Patents
Display panel, control method thereof and display device Download PDFInfo
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- CN110098241B CN110098241B CN201910426193.XA CN201910426193A CN110098241B CN 110098241 B CN110098241 B CN 110098241B CN 201910426193 A CN201910426193 A CN 201910426193A CN 110098241 B CN110098241 B CN 110098241B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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Abstract
The application provides a display panel, a control method thereof and a display device, wherein the display panel comprises: the control module, display substrate and adjusting device, adjusting device sets up the light-emitting side at display substrate, adjusting device is including the first electrode that stacks up the setting, the first insulating layer, electrostrictive layer and second electrode, control module, be connected with first electrode and second electrode respectively, be used for controlling the voltage of first electrode and second electrode, adjust the electric field that produces between first electrode and the second electrode, so that electrostrictive layer takes place the deformation under the effect of electric field, adjust the direction of propagation of the light on incidenting to electrostrictive layer. The adjusting device is arranged on the light-emitting side of the display substrate, and the electrostriction layer in the adjusting device deforms under the action of an electric field to form a lens structure, so that the transmission direction of incident light is changed, the size of a display visual angle is changed, and the display panel achieves the effects of peeping prevention (visual angle reduction) or sharing (visual angle increase).
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a control method thereof and a display device.
Background
In the prior art, display equipment such as mobile phones, tablet computers and televisions mostly adopt wide-view screens, few manufacturers add peep-proof related technologies, privacy requirements of users cannot be met, and information leakage events are frequently increased in recent years. With the enhancement of security protection consciousness of enterprises and individuals, great market demand is brought to the peep-proof technology of the display equipment.
The traditional peep-proof display is that a peep-proof film is attached to the surface of a display, the peep-proof film adopts a superfine shutter technology, the principle is similar to that of a vertical shutter, the peep-proof film enables light at a specific visual angle to penetrate through, and light at other visual angles is blocked, so that the brightness of the display is greatly reduced.
Disclosure of Invention
The invention provides a display panel, a control method thereof and a display device, which are used for improving the display transmittance.
In order to solve the above problems, the present invention discloses a display panel including: the light source comprises a control module, a display substrate and an adjusting device, wherein the adjusting device is arranged on the light emergent side of the display substrate and comprises a first electrode, a first insulating layer, an electrostrictive layer and a second electrode which are arranged in a stacked mode,
the control module is respectively connected with the first electrode and the second electrode and used for controlling the voltage of the first electrode and the voltage of the second electrode and adjusting an electric field generated between the first electrode and the second electrode, so that the electrostrictive layer deforms under the action of the electric field and the transmission direction of light rays incident on the electrostrictive layer is adjusted.
Optionally, the first electrode is disposed close to the display substrate, and the second electrode is a flexible electrode.
Optionally, the first electrode includes a plurality of strip sub-electrodes, the display substrate includes a plurality of pixel units, and each of the strip sub-electrodes corresponds to each of the pixel units.
Optionally, the material of the second electrode is ITO or a silver nanowire.
Optionally, the display substrate comprises: the organic light emitting diode comprises a substrate, a plurality of thin film transistors, a second insulating layer, a third electrode, an organic light emitting layer and a black matrix, wherein the thin film transistors, the second insulating layer and the third electrode are stacked on the substrate, the organic light emitting layer and the black matrix are formed on the third electrode and the second insulating layer in a patterning mode, the third electrode is connected with the thin film transistors through via holes formed in the second insulating layer, the first electrode is arranged on one side, away from the substrate, of the organic light emitting layer and the black matrix, the third electrode is an anode or a cathode, and the first electrode is multiplexed into a cathode or an anode corresponding to the third electrode.
Optionally, the material of the electrostrictive layer is an electroactive polymer.
Optionally, the material of the electrostrictive layer includes at least one of: AOC, DEAP, ESGE, ESP, EVEM, FEP, LCE, CNT, CP, ERF, IPG, and IPMC.
In order to solve the above problem, the present invention further discloses a display device, which includes the display panel according to any embodiment.
In order to solve the above problem, the present invention further discloses a control method of a display panel, which is applied to the display panel according to any embodiment, and the control method includes:
and controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode so as to enable the electrostrictive layer to deform under the action of the electric field and adjust the transmission direction of light rays incident on the electrostrictive layer.
Optionally, when the first electrode is disposed close to the display substrate, the second electrode is a flexible electrode, and the first electrode includes a plurality of strip sub-electrodes, the step of controlling the voltages of the first electrode and the second electrode and adjusting an electric field generated between the first electrode and the second electrode to deform the electrostrictive layer under the action of the electric field includes:
in a first display stage, controlling the voltages of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode, so that a plurality of lens structures are formed on the electrostrictive layer between the first electrode and the second electrode, wherein each lens structure corresponds to the strip-shaped sub-electrodes one to one;
and in a second display stage, adjusting the voltage of the first electrode to be the same as that of the second electrode, so that the electrostrictive layer between the first electrode and the second electrode forms a planar structure, and the planar structure is parallel to the display substrate.
Compared with the prior art, the invention has the following advantages:
the technical scheme that this application provided sets up adjusting device in the light-emitting side of display substrates, and the electrostriction layer among the adjusting device takes place deformation under the effect of electric field and forms the lens structure to change incident light's propagation direction, change and show the visual angle size, make display panel reach the effect of peeping-proof (reducing the visual angle) or sharing (increasing the visual angle).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view illustrating a display panel in a first display stage according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view illustrating a display panel at a second display stage according to an embodiment of the present disclosure;
fig. 3 is a schematic cross-sectional view illustrating another display panel provided in an embodiment of the present application;
fig. 4 is a flowchart illustrating steps of a control method for a display panel according to an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
An embodiment of the present application provides a display panel, which includes, with reference to fig. 1 and 2: the display device comprises a display substrate 10, an adjusting device 11 and a control module 12, wherein the adjusting device 11 is arranged on the light emitting side of the display substrate 10, and the adjusting device 11 comprises a first electrode 111, a first insulating layer 112, an electrostrictive layer 113 and a second electrode 114 which are arranged in a stacked mode.
The control module 12 is connected to the first electrode 111 and the second electrode 114, and configured to control voltages of the first electrode 111 and the second electrode 114 and adjust an electric field generated between the first electrode 111 and the second electrode 114, so that the electrostrictive layer 113 deforms under the action of the electric field, and the propagation direction of light incident on the electrostrictive layer 113 is adjusted.
The display substrate 10 may be an OLED (Organic Light-Emitting Diode) display substrate, for example.
The electrostrictive layer 113 may be a material having an electrostrictive effect, which has spontaneously formed molecular clusters, so-called domains, having a certain polarization and a length in the polarization direction which tends to be different from those in other directions. When an external electric field acts on the material, the electric domain rotates, so that the polarization direction of the electric domain is rotated to be consistent with the direction of the external electric field as much as possible, and the length of the material along the direction of the external electric field changes.
Specifically, the material of the electrostrictive layer 113 may be an electroactive polymer, and the electroactive polymer EAP is a smart material having specific electrical and mechanical properties. The polymer is slightly deformed after being electrically stimulated. Electroactive polymers EAPs can be classified as either electronic or ionic, depending on the mechanism of action. The electronic type EAP includes all organic composite material (AOC), dielectric EAP (deap), electrostrictive graft elastomer (ESGE), electrostrictive film (ESP), electroviscoelastic polymer (EVEM), ferroelectric polymer (FEP), Liquid Crystal Elastomer (LCE), and the like. Ionic EAPs include Carbon Nanotubes (CNTs), Conducting Polymers (CPs), electrorheological liquids (ERFs), Ionic Polymer Gels (IPGs), and ionic polymer-based metal composites (IPMCs), among others.
Accordingly, the material of the electrostrictive layer includes: at least one of electrically active polymers such as AOC, DEAP, ESGE, ESP, EVEM, FEP, LCE, CNT, CP, ERF, IPG, and IPMC.
In the first display stage, referring to fig. 1, the control module 12 can control voltages of the first electrode and the second electrode, and adjust an electric field generated between the first electrode and the second electrode, so that the electrostrictive layer between the first electrode and the second electrode is deformed into a convex lens structure under the action of the electric field, the propagation direction of light rays of the display device is changed, scattered light rays are changed into parallel light rays or cohesive light rays, the viewing angle is reduced, and the peep-proof effect is achieved; or, the control module 12 may also control the voltages of the first electrode and the second electrode, and adjust the electric field generated between the first electrode and the second electrode, so that the electrostrictive layer between the first electrode and the second electrode is deformed into a concave lens structure, and parallel rays or internal converging rays are changed into diffused rays, thereby achieving the effect of increasing the viewing angle; in a second display phase, referring to fig. 2, the control module 12 adjusts the voltage of the first electrode to be the same as the voltage of the second electrode, so that the electrostrictive layer between the first electrode and the second electrode is restored to a planar structure, which is parallel to the display substrate.
According to the display panel provided by the embodiment, the adjusting device is arranged on the light emergent side of the display substrate, and the electrostrictive layer in the adjusting device deforms under the action of an electric field to form a lens structure, so that the propagation direction of incident light is changed, the size of a display visual angle is changed, and the display panel achieves the effects of peeping prevention (visual angle reduction) or sharing (visual angle increase).
The first electrode 111 is disposed near the display substrate 10, and a material of the first electrode 111 may be, for example, ITO (Indium Tin Oxide) or other transparent electrodes.
The material of the first insulating layer 112 is a transparent insulating material, and may be, for example, silicon nitride or OC material.
The material of the second electrode 114 may be, for example, a flexible electrode material such as ITO or a nano silver wire.
In practical applications, the display substrate 10 includes a plurality of pixel units, and in order to precisely adjust the light propagation direction of each pixel unit, the first electrode 111 may include a plurality of strip-shaped sub-electrodes, and each strip-shaped sub-electrode corresponds to each pixel unit one by one. Thus, in the first display stage, the electrostrictive layer can form a plurality of lens structures under the action of the electric field, and each lens structure corresponds to the strip-shaped sub-electrodes (or pixel units) one by one.
In one implementation, referring to fig. 3, the display substrate 10 includes: the organic light emitting diode comprises a substrate 31, a plurality of thin film transistors 32, a second insulating layer 33, a third electrode 34, an organic light emitting layer 35 and a black matrix 36, wherein the thin film transistors 32, the second insulating layer 33 and the third electrode 34 are arranged on the substrate 31 in a stacked mode, the organic light emitting layer 35 and the black matrix 36 are formed on the third electrode 34 and the second insulating layer 33 in a patterned mode, the third electrode 34 is connected with each thin film transistor 32 through a through hole formed in the second insulating layer 33, a first electrode 111 is arranged on the side, away from the substrate 31, of the organic light emitting layer 35 and the black matrix 36, the third electrode 34 is an anode or a cathode, and the first electrode 111 is multiplexed into a cathode or an anode corresponding to the third electrode 34.
The thin film transistor 32 may include a gate electrode 321, a gate insulating layer 322, an active layer 323, and a source/drain electrode 324 sequentially formed on the substrate 31.
In practical applications, one process for forming the display substrate 10 is as follows:
a gate electrode 321 is fabricated on the substrate 31 through a series of patterning processes such as film formation, PR glue coating, exposure, development, etching, and the like; covering the gate insulating layer 322 on the surface of the gate 321; an Active layer 323 is formed on the gate insulating layer 322; manufacturing a source drain electrode 324 on the active layer 323; a second insulating layer 33 is covered on the source-drain electrode 324; forming a via hole 331 on the second insulating layer 33 to connect the OLED third electrode 34; then patterning to form an organic light-emitting layer 35 and a black matrix 36, wherein the black matrix 36 is used for dividing and defining pixel units; a further electrode in the OLED corresponding to the third electrode 34 is then formed, which electrode may be common to the first electrode 111 in the adjusting means 11. When the third electrode 34 is an OLED anode, the first electrode 111 is reused as a cathode of the OLED; when the third electrode 34 is the OLED cathode, the first electrode 111 is reused as the OLED anode.
Another embodiment of the present application provides a display device including the display panel according to any one of the embodiments.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
Another embodiment of the present application provides a control method for a display panel, where the control method can be applied to the display panel described in any of the above embodiments, and the control method includes:
and controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode so as to enable the electrostrictive layer to deform under the action of the electric field and adjust the transmission direction of light rays incident on the electrostrictive layer.
In practical applications, this step may be performed by the control module.
In an implementation manner, when the first electrode is disposed close to the display substrate, the second electrode is a flexible electrode, and the first electrode includes a plurality of strip sub-electrodes, referring to fig. 4, the control method provided in this embodiment may specifically include:
step 401: in the first display stage, the voltages of the first electrode and the second electrode are controlled, and the electric field generated between the first electrode and the second electrode is adjusted, so that the electrostrictive layer between the first electrode and the second electrode forms a plurality of lens structures, and each lens structure corresponds to the strip-shaped sub-electrodes one by one.
Specifically, the voltages of the first electrode and the second electrode can be controlled, and the electric field generated between the first electrode and the second electrode is adjusted, so that the electrostrictive layer between the first electrode and the second electrode is deformed into a convex lens structure under the action of the electric field, the propagation direction of light rays of the display device is changed, scattered light rays are changed into parallel light rays or cohesive light rays, the visual angle is reduced, and the peep-proof effect is achieved; or, the voltage of the first electrode and the second electrode can be controlled, and the electric field generated between the first electrode and the second electrode is adjusted, so that the electrostrictive layer between the first electrode and the second electrode is changed into a concave lens structure, parallel rays or internal condensing rays are changed into diffused rays, and the effect of increasing the visual angle is achieved.
Step 402: and in the second display stage, adjusting the voltage of the first electrode to be the same as that of the second electrode so that the electrostrictive layer between the first electrode and the second electrode forms a planar structure, wherein the planar structure is parallel to the display substrate.
The application provides a display panel, a control method thereof and a display device, wherein an adjusting device is arranged on the light-emitting side of a display substrate, and an electrostrictive layer in the adjusting device deforms under the action of an electric field to form a lens structure, so that the propagation direction of incident light is changed, the size of a display visual angle is changed, and the display panel achieves the effects of peeping prevention (visual angle reduction) or sharing (visual angle increase).
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The display panel, the control method thereof and the display device provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (4)
1. A display panel for use in a privacy scene, the display panel comprising:
the display substrate is an OLED display substrate and comprises a plurality of pixel units, each pixel unit is provided with a TFT and a light-emitting diode, and the light-emitting diode comprises an anode, a light-emitting layer and a cathode which are sequentially arranged on a substrate;
the adjusting device is arranged on the OLED display substrate and comprises a first electrode, a first insulating layer, an electrostrictive layer and a second electrode which are arranged in a stacked mode, wherein the first electrode and the cathode share the same electrode; the material of the electrostrictive layer is an electroactive polymer, the electroactive polymer comprises a liquid crystal elastomer, the liquid crystal elastomer is filled between each first electrode and each second electrode, and no spacer is arranged between the liquid crystal elastomers between adjacent pixel units; the first electrode comprises a plurality of strip-shaped sub-electrodes, and each strip-shaped sub-electrode corresponds to each pixel unit one by one; the second electrode is a flexible electrode configured to deform with deformation of the electrostrictive layer; the deformation of the electrostrictive layer comprises deformation into a concave lens structure or a convex lens structure, and the concave lens structure or the convex lens structure corresponds to the pixel units one by one;
the control module is respectively connected with the first electrode and the second electrode, and is used for controlling the voltages of the first electrode and the second electrode and adjusting an electric field generated between the first electrode and the second electrode when peep-proof display is required so that a plurality of convex lens structures are formed on the electrostrictive layer between the first electrode and the second electrode, and each convex lens structure corresponds to the strip-shaped sub-electrode one by one;
when the shared display is needed, controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode so that the electrostrictive layer between the first electrode and the second electrode forms a plurality of concave lens structures, wherein each concave lens structure corresponds to the strip-shaped sub-electrodes one by one;
and in a non-peeping display stage, adjusting the voltage of the first electrode to be the same as that of the second electrode so as to enable the electrostrictive layer between the first electrode and the second electrode to form a planar structure, wherein the planar structure is parallel to the display substrate.
2. The display panel according to claim 1, wherein the material of the second electrode is ITO or a nano silver wire.
3. The display panel of claim 1, wherein the material of the electrostrictive layer further comprises at least one of: AOC, DEAP, ESGE, ESP, EVEM, FEP, LCE, CNT, CP, ERF, IPG, and IPMC.
4. A control method of a display panel, applied to the display panel according to any one of claims 1 to 3, the control method comprising:
controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode so as to enable the electrostrictive layer to deform under the action of the electric field and adjust the transmission direction of light rays incident on the electrostrictive layer;
when the first electrode is close to the display substrate, the second electrode is a flexible electrode, and the first electrode includes a plurality of strip sub-electrodes, controlling the voltage of the first electrode and the second electrode, and adjusting the electric field generated between the first electrode and the second electrode, so that the electrostrictive layer deforms under the action of the electric field, including:
when peep-proof display is needed, controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode so as to enable the electrostrictive layer between the first electrode and the second electrode to form a plurality of convex lens structures, wherein each convex lens structure corresponds to the strip-shaped sub-electrodes one by one;
when sharing display is needed, controlling the voltage of the first electrode and the second electrode, and adjusting an electric field generated between the first electrode and the second electrode, so that the electrostrictive layer between the first electrode and the second electrode forms a plurality of concave lens structures, wherein each concave lens structure corresponds to the strip-shaped sub-electrodes one by one;
and in a non-peeping display stage, adjusting the voltage of the first electrode to be the same as that of the second electrode so as to enable the electrostrictive layer between the first electrode and the second electrode to form a planar structure, wherein the planar structure is parallel to the display substrate.
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| CN201910426193.XA CN110098241B (en) | 2019-05-21 | 2019-05-21 | Display panel, control method thereof and display device |
| PCT/CN2020/076189 WO2020233181A1 (en) | 2019-05-21 | 2020-02-21 | Display panel and control method thereof, and display device |
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| CN201910426193.XA CN110098241B (en) | 2019-05-21 | 2019-05-21 | Display panel, control method thereof and display device |
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| CN110098241B true CN110098241B (en) | 2022-08-30 |
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| CN110098241B (en) * | 2019-05-21 | 2022-08-30 | 京东方科技集团股份有限公司 | Display panel, control method thereof and display device |
| CN110764252B (en) * | 2019-10-28 | 2022-02-25 | 京东方科技集团股份有限公司 | Transparent panel and naked eye three-dimensional display device |
| CN111092107B (en) * | 2019-12-25 | 2022-08-05 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113078184B (en) * | 2020-01-06 | 2023-09-26 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| CN113497094A (en) * | 2020-04-03 | 2021-10-12 | 深圳市柔宇科技有限公司 | Flexible display panel and flexible display device |
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| CN111987128B (en) * | 2020-08-26 | 2022-06-24 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN113703155B (en) * | 2021-09-08 | 2023-09-26 | 武汉华星光电技术有限公司 | Display device |
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| CN114594626B (en) * | 2022-03-17 | 2023-07-04 | 北京京东方光电科技有限公司 | TFT substrate, TFT substrate preparation method, display panel and display device |
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Also Published As
| Publication number | Publication date |
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| WO2020233181A1 (en) | 2020-11-26 |
| CN110098241A (en) | 2019-08-06 |
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