CN117479667A - Display panel, electronic equipment and peep-proof method - Google Patents
Display panel, electronic equipment and peep-proof method Download PDFInfo
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- CN117479667A CN117479667A CN202311189923.1A CN202311189923A CN117479667A CN 117479667 A CN117479667 A CN 117479667A CN 202311189923 A CN202311189923 A CN 202311189923A CN 117479667 A CN117479667 A CN 117479667A
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Classifications
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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
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- 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
- H10K59/80—Constructional details
- H10K59/805—Electrodes
-
- 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
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
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- Computer Hardware Design (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a display panel, electronic equipment and a peeping-preventing method, wherein the display panel comprises a substrate, a pixel definition layer, a plurality of light emitting units and a shading layer; the light-emitting unit comprises an anode layer, a light-emitting layer and a cathode layer which are stacked; wherein the anode layer comprises a first pixel electrode and a second pixel electrode which are not conducted with each other; during operation of the display panel, the first pixel electrode and the second pixel electrode are driven independently of each other. The display panel disclosed by the invention solves the problems that in the prior art, the display panel is stuck with the peep-proof film to realize peep-proof, so that the haze of the screen is high and the display panel is not suitable for long-time reading.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, an electronic device, and a peep-proof method.
Background
With the development of display technology, terminal devices such as mobile phones and computers have been widely used. In general, a terminal device has a larger viewing angle, and users located at different viewing angles can know the information displayed by the terminal device. This may be a great advantage for public displays; however, confidentiality of personal information security is disadvantageous. Therefore, it is desirable that the terminal device has a peep-proof function.
At present, consumers can paste the peep-proof film on the display screen of the terminal equipment, the peep-proof film is used for filtering out light rays with a large visual angle, and only small-angle light rays which are almost perpendicularly emitted out of the display screen are reserved, so that users in the position with the large visual angle cannot receive pictures displayed by the display screen, and privacy and message disclosure are prevented. However, the peep-proof film has higher haze, and long-time reading may cause discomforts such as dizziness.
Disclosure of Invention
The invention provides a display panel, which solves the problems that in the prior art, the screen haze is high and the display panel is not suitable for long-time use due to the fact that a peep-proof film is attached to the display panel for realizing peep prevention.
A first aspect of the present invention provides a display panel, comprising: a substrate; a pixel defining layer disposed on one side of the substrate; a plurality of pixel openings are arranged in the pixel definition layer; a plurality of light emitting units respectively arranged in the pixel openings; each light-emitting unit comprises an anode layer, a light-emitting layer and a cathode layer which are arranged in a stacked manner, wherein the anode layer is arranged on one side of the substrate; the shading layer is arranged on one side of the pixel definition layer, which is away from the substrate; the shading layer is internally provided with a plurality of filtering holes, and each filtering hole is internally provided with a color filter; wherein the anode layer comprises a first pixel electrode and a second pixel electrode which are not conducted with each other; the first and second pixel electrodes are driven independently of each other during operation of the display panel.
Further, the second pixel electrode is disposed around the first pixel electrode.
Further, the area ratio of the color filter to the first pixel electrode in the corresponding light-emitting unit is 1-4:1.
Further, the first pixel electrode and the second pixel electrode are separated by a gap.
Further, the width of the gap is 0.5-5 μm.
Further, the first pixel electrode and the second pixel electrode are separated by an insulating barrier rib.
Further, the material of the insulating parting strip comprises one or more of polyimide, polycarbonate, polyethylene terephthalate and polyethylene naphthalate; and/or the width of the insulating parting bead is 0.5-5 mu m.
Further, the display panel further includes: the packaging film layer is arranged on one side of the pixel definition layer, which is away from the substrate; the light shielding layer is arranged on one side of the packaging film layer, which is away from the substrate.
A second aspect of the present invention provides an electronic device comprising the aforementioned display panel.
The third aspect of the present invention provides a peep-proof method, applied to the foregoing electronic device, where the peep-proof method includes: acquiring a starting instruction input by a user; and supplying power to the second pixel electrode according to the starting instruction so as to drive the second pixel electrode, thereby realizing peep prevention.
Further, the start instruction includes at least one of a touch instruction, a key instruction, and a sound instruction.
The invention has the advantages that: the present invention sets the pixel electrodes in the display panel as the first pixel electrode and the second pixel electrode that are non-conductive to each other, and they are driven independently of each other. When the first pixel electrode is driven, only the light-emitting layer corresponding to the first pixel electrode emits light at the moment, namely the light-emitting area of the pixel is smaller than the light-filtering hole in the shading layer, the light emergent angle of light is larger at the moment, the visible angle of the display panel is larger, and the display panel is in a non-peeping-preventing mode. When the first pixel electrode and the second pixel electrode are both applied with voltages, the light-emitting layers corresponding to the first pixel electrode and the second pixel electrode emit light, at the moment, the light-emitting area of the pixel is increased, and when the driving current is kept unchanged, the total light-emitting brightness in the pixel opening is unchanged, so that the illuminance of the unit area of the pixel is reduced; meanwhile, as the light emitting area of the pixel is larger than that of the light filtering hole in the shading layer, the light ray part under a large angle is absorbed by the black matrix, finally, the brightness of emergent light under the large angle is reduced, and the brightness of the display panel is rapidly attenuated along with the increase of the visual angle, namely the peep-proof mode.
The display panel can be switched between the peep-proof mode and the non-peep-proof mode only by controlling whether the first pixel electrode and the second pixel electrode are electrified or not, so that the display panel is very convenient to use; the peep-proof mode can not improve the haze of the screen and can be read for a long time; and the switching of the peep-proof mode can not sacrifice the PPI of the screen body and can not influence the reading experience.
Drawings
The technical solution and other advantageous effects of the present invention will be made apparent by the following detailed description of the specific embodiments of the present invention with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the invention;
fig. 2 is a schematic structural view of a light emitting unit;
FIG. 3 is a top view of a pixel electrode in the display panel shown in FIG. 1;
FIG. 4 is a schematic diagram of another embodiment of a display panel according to the present invention;
100. a display panel;
10. a substrate;
20. a pixel definition layer; 21. a pixel opening;
30. a light emitting unit; 31. an anode layer; 32. a light emitting layer; 33. a cathode layer; 34. a hole injection layer; 35. a hole transport layer; 36. an electron transport layer; 37. an electron injection layer;
311. a first pixel electrode; 312. a second pixel electrode; 313. a gap; 314. insulating parting strips;
40. packaging the film layer; 41. a first inorganic encapsulation layer; 42. an organic encapsulation layer; 43. a second inorganic encapsulation layer;
50. a light shielding layer; 51. a filter hole; 52. a color filter.
Detailed Description
The following detailed description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings, is provided to fully convey the substance of the invention to those skilled in the art, and to illustrate the invention to practice it, so that the technical disclosure of the invention will be made more clear to those skilled in the art to understand how to practice the invention more easily. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as limited to the set forth herein.
The directional terms used herein, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are used for explaining and describing the present invention only in terms of the directions of the drawings and are not intended to limit the scope of the present invention.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of understanding and description, and the present invention is not limited to the size and thickness of each component.
In the prior art, in order to solve the peep-proof problem of electronic equipment, a common method is to attach a peep-proof film on the surface of a screen, and filter light rays with a large visual angle through the peep-proof film, so that the peep-proof effect is realized. However, on one hand, the use of the peep-proof film can lead to the reduction of the brightness of the screen, and influence the appearance of a user; on the other hand, the haze of the screen is higher, and discomfort such as dizziness and the like of a user can be caused when the screen is used for a long time.
Another privacy solution is: two types of pixels are designed in the display panel, one pixel is a normal pixel, and light emitting at a large angle can be realized; the other pixel is a peep-proof pixel, and the corresponding Black Matrix (BM) opening is smaller, so that the light rays with large angles can be blocked, and the brightness attenuation is accelerated along with the increase of the visual angle. When the screen is displayed, the normal pixel and the peep-proof pixel are controlled to emit light respectively, so that the switching between the normal mode and the peep-proof mode can be realized. One significant drawback of this privacy solution is that: the PPI of the display panel may be halved, resulting in problems such as unclear text reading, and thus deteriorating the consumer's use experience.
In addition, some documents disclose other peep-proof solutions, for example, patent CN116224668A, CN114995002a discloses a new peep-proof display screen, in which a peep-proof layer is arranged inside the screen, and a color-changing film with adjustable transparency when being electrified is arranged in the peep-proof layer, and the peep-proof layer is electrified to change color, so that the transmittance or viewing angle of the screen is changed, and the purpose of peep-proof is achieved. Although the solution can realize better peeping prevention effect, the peeping prevention layer is arranged in the screen, so that the thickness of the screen is thickened, the internal structure of the screen is complicated, the difficulty of a preparation process is increased, and the production cost of the screen is increased.
In view of the above technical problems, the inventor provides a brand new solution, and under the condition of not changing the internal structure of the display panel, the display panel has two modes, namely a normal mode and a peep-proof mode, by redesigning the pixel electrode, and the display panel does not sacrifice the display precision of the screen body or increase the thickness of the screen; meanwhile, the internal structure of the display panel is not greatly different from that of the existing display panel, the preparation process is simpler, and the production cost of the screen is not increased remarkably.
The invention is illustrated below in connection with specific embodiments.
Example 1
Referring to fig. 1, the present application provides a display panel 100, wherein the display panel 100 is an Organic Light-Emitting Diode (OLED) display panel adopting a POL-less technology, and includes a substrate 10, a pixel defining layer 20, a Light Emitting unit 30, and a Light shielding layer 50.
The substrate 10 includes a substrate and a thin film transistor layer disposed on the substrate. The substrate may be a rigid substrate or a flexible substrate, wherein the rigid substrate may include a rigid substrate such as a glass substrate, and the flexible substrate may include a flexible substrate such as a Polyimide (PI) film, a Polycarbonate (PC), a polyethylene terephthalate (Polyethylene Terephthalate, PET), a polyethylene naphthalate (PEN), an ultra-thin glass film, or the like. When the flexible substrate is used as the substrate, the flexible display panel can be manufactured, so that the display panel has special performances such as bending, curling and the like.
The thin film transistor layer is disposed between the substrate and the light emitting unit 30, and the light emitting unit 30 is electrically connected to the thin film transistor layer, and the thin film transistor layer is mainly used for driving the light emitting unit 30 to perform light emitting display.
In an alternative embodiment, a buffer layer may also be provided between the substrate and the thin film transistor layer. The buffer layer may be made of an inorganic material including, but not limited to, silicon oxide (SiO) x ) Silicon nitride (SiN) x ) Inorganic materials such as silicon oxynitride (SiON). The buffer layer is arranged, so that water and oxygen can be isolated, other impurity ions or pollutants are prevented from diffusing from the substrate side to the inside of the display panel, and the thin film transistor device in the display panel is prevented from being polluted.
The pixel defining layer 20 is disposed on one side of the substrate 10, and a plurality of pixel openings 21 are disposed therein in a patterned manner. The light emitting units 30 are correspondingly disposed in the plurality of pixel openings 21, and thus the area of the pixel opening 21 is the light emitting area of the light emitting unit 30.
Referring to fig. 2, the light emitting unit 30 includes an anode layer 31, a light emitting layer 32, and a cathode layer 33 stacked, wherein the anode layer 31 is formed on the surface of the substrate 10 exposed in the pixel opening 21 and is electrically connected to the thin film transistor layer through a via hole.
The anode layer 31 may be a reflective electrode or a transparent electrode. When the anode layer 31 is a reflective electrode, the anode layer 31 may be a reflective layer formed of Ag, mg, al, pt, pd, au, ni, nd, ir, cr or a combination thereof, and made of Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), znO or In 2 O 3 And a reflective layer formed. When the anode layer 31 is a transparent electrode, the anode layer 31 may be made of ITO, IZO, znO or In 2 O 3 And (5) forming. However, the material of the anode layer 31 is not limited thereto, and may be formed of other materials having similar functions, and may also be a single-layer or multi-layer structure.
It should be noted that the transparent electrode is also used for the anode layer 31It is the reflective electrode that depends on the light exit direction of the display panel. When the display panel 100 employs top emission, the anode layer 31 may employ either a reflective electrode or a transparent electrode. Of course, when the reflective electrode is used, the light utilization efficiency of the light emitting layer 32 can be improved. When the display panel 100 adopts bottom emission, the pixel electrode can only adopt a transparent electrode, so that light emitted from the light emitting layer 32 passes through the anode layer 31 and exits from the bottom. In this embodiment, the display panel 100 adopts a top-emission mode, and the light-emitting direction of the light-emitting layer 32 is the side of the light-emitting layer 32 away from the substrate 10. Therefore, the anode layer 31 preferably employs a reflective electrode. Accordingly, in order to increase the transmittance of light, the cathode layer 33 is made of a transparent conductive material. The transparent conductive material includes transparent conductive oxide (Transparent Conductive Oxide, TCO), such as ITO, IZO, znO or In 2 O 3 And the like.
The light emitting layer 32 is formed of a light emitting material printed on the anode layer 31 in the pixel opening 21, and different colors of light emitting layers 32 are formed using different colors of light emitting materials. For example, when the light emitting layer 32 is formed of a red light emitting material, the light emitting unit 30 emits red light; when the light emitting layer 32 is formed of a green light emitting material, the light emitting unit 30 emits green light; when the light emitting layer 32 is formed of a blue light emitting material, the light emitting unit 30 emits blue light.
The adjacent three light emitting units 30 together constitute one pixel unit. When the adjacent three light emitting units 30 in one pixel unit emit red light, green light, and blue light, respectively, the above pixel unit can display various colors due to the characteristics of the three primary colors. Therefore, when the display panel 100 includes a plurality of the pixel units, the display panel can display different colors, so as to realize full-color display.
In addition, the light emitting unit 30 includes other functional layers in addition to the light emitting layer 32. These functional layers include a hole injection layer 34 (HIL) and a hole transport layer 35 (HTL) which are sequentially stacked from the anode layer 31 toward the light emitting layer 32, and an electron transport layer 36 (ETL) and an electron injection layer 37 (EIL) which are sequentially stacked from the light emitting layer 32 toward the cathode layer 33. The hole injection layer 34 may receive holes transferred from the anode layer 31, the holes transferred to the light emitting layer 32 via the hole transfer layer 35, the electron injection layer 37 may receive electrons transferred from the cathode layer 33, the electrons transferred to the light emitting layer 32 via the electron transfer layer 36, and the holes and the electrons meet and combine in the light emitting layer 32 to generate excitons, which transition from an excited state to a ground state to release energy, thereby emitting light.
Referring to fig. 1, in some embodiments, in order to protect the light emitting layer 32, prevent the light emitting layer 32 from being disabled due to intrusion of water and oxygen, an encapsulation film layer 40 may be further disposed in the display panel 100. The encapsulation film 40 is located on the surface of the cathode 33 facing away from the substrate 10, i.e. the encapsulation film 40 covers the surface of the cathode 33. Optionally, the encapsulating film 40 is formed by laminating two or more encapsulating films, so as to improve the sealing property and the capability of isolating water and oxygen. In a preferred embodiment, the encapsulation film layer 40 is formed by sequentially stacking a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43, wherein the first inorganic encapsulation layer 41 is in direct contact with the surface of the cathode layer 33. The materials of the first and second inorganic encapsulation layers 41 and 43 may include one or a combination of several of inorganic materials such as silicon oxide, silicon nitride, silicon oxynitride, and the like. The material of the organic encapsulation layer 42 may include one or more of epoxy-based, acrylic-based, and the like organic materials. In preparing the encapsulation film 40, the inorganic encapsulation layer may be deposited on the cathode or the organic encapsulation layer by a deposition process such as chemical vapor deposition (Chemical Vapor Deposition, CVD), physical vapor deposition (Physical Vapor Deposition, PVD), atomic layer deposition (Atomic Layer Deposition, ALD), etc.; the organic encapsulation layer may be coated on the first inorganic encapsulation layer by an Ink Jet Printing (IJP), spraying, or the like process.
The light shielding layer 50 is disposed on a side of the pixel defining layer 20 facing away from the substrate 10, and includes a black matrix and a plurality of filter holes 51 formed in the black matrix, wherein a color filter 52 is disposed in each of the filter holes 51. The filter holes 51 are disposed corresponding to the corresponding light emitting units 30, and the color of each color filter 52 corresponds to the color emitted by the corresponding light emitting unit 30 to filter out light of other colors. The color filter 52 may be made of plastic or resin material having good light transmittance, and may be, for example, polymethyl methacrylate (Polymethyl Methacrylate, PMMA), polycarbonate (PC), or the like.
Unlike the conventional OLED display panel, in the present application, the anode layer 31 in the display panel 100 is not a complete electrode, but includes a first pixel electrode 311 and a second pixel electrode 312 that are non-conductive to each other; wherein the first pixel electrode 311 and the second pixel electrode 312 are driven independently of each other during operation of the display panel 100.
Referring to fig. 1 and 3, in the present embodiment, the first pixel electrode 311 and the second pixel electrode 312 are separated by a gap 313. The width of the gap 313 is not required in the present application, and the first pixel electrode 311 and the second pixel electrode 312 need only be kept in a non-conductive state. Alternatively, the width of the gap 313 may be 0.5 to 5 μm, for example, 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, or the like.
In this application, the first pixel electrode 311 cannot be too large relative to the corresponding filter hole 51 in the light shielding layer 50, and if the first pixel electrode 311 is too large relative to the filter hole 51, a large amount of light is absorbed by the black matrix, resulting in lower light emitting efficiency of the display panel 100 and insufficient screen brightness. Alternatively, the area ratio of the filter hole 51 to the first pixel electrode 311 is 1 to 4:1, for example, may be 1:2, 2:1, 3:1, 4:1, or the like.
In a preferred embodiment, the second pixel electrode 312 is disposed around the first pixel electrode 311, that is, the first pixel electrode 311 is located at the middle of the pixel opening 21, and the second pixel electrode 312 is located at the outer side of the first pixel electrode 311, which are separated by a gap 313 therebetween. In this embodiment, since the first pixel electrode 311 is positioned at the middle, the outgoing angle of the light in each direction is more uniform, thereby providing a screen with a better viewing angle.
In this application, the shapes of the first pixel electrode 311 and the second pixel electrode 312 are not limited, and may be, for example, circular, rectangular, diamond, trapezoid, polygonal, or the like. Preferably, the first pixel electrode 311 and the second pixel electrode 312 are both circular.
In this application, the first pixel electrode 311 and the second pixel electrode 312 are driven independently of each other, that is, voltages are applied to the first pixel electrode 311 and the second pixel electrode 312 independently of each other, so that the light emitting layer 32 in the corresponding region emits light under the action of the voltages, and thus the light emitting region in the light emitting unit 30 can be controlled.
The principle of the display panel 100 of the present application having the peep preventing function is as follows:
referring to fig. 1, when only the first pixel electrode 311 is driven, the first pixel electrode 311 is applied with a voltage, and only the light emitting layer 32 corresponding to the first pixel electrode 311 emits light, at this time, the light emitting area of the pixel is smaller than the light filtering hole 51 in the light shielding layer 50, the light emitting angle of the light is larger, and the viewing angle of the display panel 100 is larger, namely the non-peeping mode.
When the first pixel electrode 311 and the second pixel electrode 312 are simultaneously driven, both the first pixel electrode 311 and the second pixel electrode 312 are applied with a voltage, and the light emitting layers 32 corresponding to the first pixel electrode 311 and the second pixel electrode 312 emit light, and at this time, the light emitting area of the pixel increases, and when the driving current is kept unchanged, the total light emitting luminance in the pixel opening is unchanged, and therefore the illuminance per unit area of the pixel decreases. Meanwhile, since the light emitting area of the pixel is larger than the light filtering hole 51 in the light shielding layer 50, the light portion under the large angle is absorbed by the black matrix, which finally results in the decrease of the brightness of the outgoing light under the large angle, and the display panel 100 is in the peep-proof mode as the brightness of the display panel is rapidly attenuated with the increase of the viewing angle.
The display panel 100 may be manufactured by the following manufacturing method:
s1, preparing a plurality of patterned anode layers 31 on one side of a substrate 10, wherein each anode layer 31 comprises a first pixel electrode 311 and a second pixel electrode 312 which are non-conductive;
s2, preparing a pixel definition layer 20 on one side of the substrate 10, wherein a plurality of pixel openings 21 corresponding to the anode layer 31 are arranged in the pixel definition layer 20 so as to expose the anode layer 31;
s3, sequentially preparing a light-emitting layer 32 and a cathode layer 33 on one side of the anode layer 31 away from the substrate 10;
s4, preparing a shading layer 50 on one side of the pixel defining layer 20 away from the substrate 10, wherein a plurality of filtering holes 51 are formed in the shading layer 50, and a color filter 52 is arranged in each filtering hole 51.
In step S2, when the first pixel electrode 311 and the second pixel electrode 312 are separated by the gap 313, the following method may be used to prepare the pixel electrode: the electrode layer is obtained by vapor deposition prior to the surface of the substrate 10, and then a gap 313 is formed in the electrode layer by photolithography, whereby the gap 313 separates the electrode layer into a first pixel electrode 311 and a second pixel electrode 312 that are non-conductive to each other.
In some embodiments, the method of making further comprises: an encapsulation film layer 40 is prepared on a side of the pixel defining layer 20 facing away from the substrate 10, and a light shielding layer 50 is formed on a side of the encapsulation film layer 40 facing away from the substrate 10. The encapsulation film 40 can protect the light emitting layer 32 from being damaged by moisture. In some embodiments, the encapsulation film layer 40 may be composed of three layers, namely, a first inorganic encapsulation layer 41, an organic encapsulation layer 42, and a second inorganic encapsulation layer 43, and the first inorganic encapsulation layer 41 and the second inorganic encapsulation layer 43 may be prepared by a deposition process, and the organic encapsulation layer 42 may be prepared by printing, coating, or the like.
The display panel 100 of the present application may be further applied to various electronic devices, including but not limited to mobile phones, televisions, computers, tablets, electronic books, and other various devices with display screens, so that the electronic devices have peep-proof functions. The electronic device is further preferably a mobile electronic device, so that message leakage can be avoided when the electronic device is used in public places.
In some embodiments, a separate function key is provided on the electronic device, and the function key is used to switch the electronic device between a normal mode and a peep-proof mode. Specifically, the function key may control on/off of a circuit for supplying power to the second pixel electrode 312, for example, when the function key is in a gear, the circuit for supplying power to the second pixel electrode 312 is in an off state, and at this time, the display panel 100 displays normally and is in a normal mode; when the function key is at the second gear, the circuit for supplying power to the second pixel electrode 312 is in a conductive state, and at this time, the display brightness of the display panel 100 at a large viewing angle is reduced, and the display panel is in a peep-proof mode.
In other embodiments, the display panel 100 may be switched between the normal mode and the peep-proof mode by other methods, for example, but not limited thereto, by touch operation or voice.
The present application further provides a peep-proof method applied to various electronic devices with the display panel 100 of the present application, and the peep-proof method specifically includes:
acquiring a starting instruction input by a user;
according to the start instruction, power is supplied to the second pixel electrode 312 to drive the second pixel electrode 312, so as to realize peep prevention.
The actuation command includes any command that can control the power to the second pixel electrode 312, including but not limited to at least one of a touch command, a key command, and a voice command.
Example 2
Referring to fig. 4, most of the technical features of the display panel 100 of the present embodiment are the same as those of embodiment 1, except that: in this embodiment, the first pixel electrode 311 and the second pixel electrode 312 are separated by an insulating spacer 314, so as to avoid mutual interference between the first pixel electrode 311 and the second pixel electrode 312 and improve the insulation therebetween. The insulating spacer 314 is made of a material with good insulation, including but not limited to one or more of PI, PC, PET, PEN. Alternatively, the width of the insulating spacers 314 may be 0.5-5 μm, such as 0.5 μm, 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, etc.
In this embodiment, the first pixel electrode 311 and the second pixel electrode 312 can be prepared by the following method: the insulating barrier ribs 314 are prepared on the surface of the substrate 10, and then electrode layers are evaporated on the surfaces of the substrate 10 on two sides of the insulating barrier ribs 314, so as to obtain the first pixel electrode 311 and the second pixel electrode 312 which are not conducted with each other.
In summary, although the present invention has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is defined by the appended claims.
Claims (11)
1. A display panel, comprising:
a substrate (10);
a pixel defining layer (20) provided on one side of the substrate (10); a plurality of pixel openings (21) are arranged in the pixel definition layer (20);
a plurality of light emitting units (30) respectively arranged in the plurality of pixel openings (21); each light emitting unit (30) comprises an anode layer (31), a light emitting layer (32) and a cathode layer (33) which are stacked, wherein the anode layer (31) is arranged on one side of the substrate (10); and
a light shielding layer (50) disposed on a side of the pixel defining layer (20) facing away from the substrate (10); a plurality of filter holes (51) are formed in the light shielding layer (50), and a color filter (52) is arranged in each filter hole (51);
wherein the anode layer (31) comprises a first pixel electrode (311) and a second pixel electrode (312) which are non-conductive to each other; during operation of the display panel, the first pixel electrode (311) and the second pixel electrode (312) are driven independently of each other.
2. A display panel as claimed in claim 1, characterized in that the second pixel electrode (312) is arranged around the outside of the first pixel electrode (311).
3. A display panel as claimed in claim 1, characterized in that the area ratio of the filter aperture (51) to the first pixel electrode (311) in the respective light emitting unit (30) is 1-4:1.
4. A display panel as claimed in claim 1, characterized in that the first pixel electrode (311) and the second pixel electrode (312) are separated by a gap (313).
5. The display panel of claim 4, wherein the gap has a width of 0.5 to 5 μm.
6. A display panel as claimed in claim 1, characterized in that the first pixel electrode (311) and the second pixel electrode (312) are separated by an insulating spacer (314).
7. The display panel of claim 6, wherein the material of the insulating spacer bar comprises one or more of polyimide, polycarbonate, polyethylene terephthalate, polyethylene naphthalate; and/or the number of the groups of groups,
the width of the insulating parting bead is 0.5-5 mu m.
8. The display panel of claim 1, wherein the display panel further comprises:
the packaging film layer (40) is arranged on one side, away from the substrate (10), of the pixel definition layer (20); the light shielding layer (50) is arranged on one side of the packaging film layer (40) away from the substrate (10).
9. An electronic device comprising the display panel according to any one of claims 1 to 8.
10. The peep-proof method applied to the electronic equipment as claimed in claim 9, characterized in that the peep-proof method comprises the following steps:
acquiring a starting instruction input by a user;
and according to the starting instruction, supplying power to the second pixel electrode (312) to drive the second pixel electrode (312) so as to realize peep prevention.
11. The privacy method of claim 10, wherein the initiation command comprises at least one of a touch command, a key command, and a voice command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311189923.1A CN117479667A (en) | 2023-09-13 | 2023-09-13 | Display panel, electronic equipment and peep-proof method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311189923.1A CN117479667A (en) | 2023-09-13 | 2023-09-13 | Display panel, electronic equipment and peep-proof method |
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| Publication Number | Publication Date |
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| CN117479667A true CN117479667A (en) | 2024-01-30 |
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| CN202311189923.1A Pending CN117479667A (en) | 2023-09-13 | 2023-09-13 | Display panel, electronic equipment and peep-proof method |
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| Country | Link |
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| CN (1) | CN117479667A (en) |
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