CN117596942A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN117596942A
CN117596942A CN202311569820.8A CN202311569820A CN117596942A CN 117596942 A CN117596942 A CN 117596942A CN 202311569820 A CN202311569820 A CN 202311569820A CN 117596942 A CN117596942 A CN 117596942A
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CN
China
Prior art keywords
light
electrode
emitting element
electrically connected
display panel
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Pending
Application number
CN202311569820.8A
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Chinese (zh)
Inventor
马扬昭
王美红
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Hubei Changjiang New Display Industry Innovation Center Co Ltd
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Hubei Changjiang New Display Industry Innovation Center Co Ltd
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Priority to CN202311569820.8A priority Critical patent/CN117596942A/en
Publication of CN117596942A publication Critical patent/CN117596942A/en
Pending legal-status Critical Current

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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
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • 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]
    • 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]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/066—Adjustment of display parameters for control of contrast

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Geometry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The invention discloses a display panel and a display device, wherein the display panel comprises a substrate base plate and a plurality of sub-pixels positioned on one side of the substrate base plate, and at least one sub-pixel comprises a first light-emitting element and a second light-emitting element; the light shielding layer comprises a light shielding part and a light transmitting part adjacent to the light shielding part, the light shielding part and the second light emitting element at least partially overlap along the direction perpendicular to the plane of the substrate, and the light transmitting part and the first light emitting element at least partially overlap; the display panel comprises a first working mode and a second working mode; in the first operation mode, both the first light emitting element and the second light emitting element emit light; in the second working mode, only the first light-emitting element emits light, and the auxiliary light-emitting element is additionally arranged in the same sub-pixel, so that the brightness proportion of the inclined view angles of all the sub-pixels is changed by using the auxiliary light-emitting element when the peep-proof display is performed, the contrast ratio of the display panel is reduced, and the purpose of one-key peep-proof is realized.

Description

Display panel and display device
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Along with the continuous promotion of the attention of personal privacy, the display screen is required to have the peep-proof function, however, the peep-proof effect of the conventional common peep-proof display panel is general, the display requirements of different visual angles of the display panel cannot be met, and under the condition of ensuring the normal display effect, the peep-proof effect of the display panel is required to be improved urgently.
Disclosure of Invention
The invention provides a display panel and a display device, wherein an auxiliary light-emitting element is additionally arranged in the same sub-pixel, so that the brightness proportion of the inclined view angles of all the sub-pixels is changed by utilizing the auxiliary light-emitting element when the peep-proof display is performed, the contrast ratio of the display panel is reduced, and the purpose of one-key peep-proof is realized.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate and a plurality of sub-pixels located at one side of the substrate, at least one of the sub-pixels including a first light emitting element and a second light emitting element;
a light shielding layer including a light shielding portion and a light transmitting portion adjacent to the light shielding portion, the light shielding portion and the second light emitting element at least partially overlapping in a direction perpendicular to a plane in which the substrate is located, the light transmitting portion and the first light emitting element at least partially overlapping;
The display panel comprises a first working mode and a second working mode; in the first operation mode, the first light-emitting element and the second light-emitting element both emit light; in the second operation mode, only the first light emitting element emits light.
In a second aspect, an embodiment of the present invention further provides a display apparatus, where the display apparatus further includes the display panel provided in the first aspect.
According to the display panel provided by the embodiment of the invention, at least two light emitting elements are arranged in one sub-pixel, the first light emitting element is a main light emitting element, the second light emitting element is an auxiliary light emitting element, in a first working mode, both the first light emitting element and the second light emitting element are controlled to emit light, at least part of emergent light rays of the second light emitting element are shielded by utilizing the shading part, a user only sees the emergent light rays of the first light emitting element at a normal display visual angle, and sees the mixed light rays of the first light emitting element and the second light emitting element at a side view angle, and the brightness proportion of the sub-pixel and the contrast ratio of the display panel can be changed by the mixed light rays, so that the peep-proof effect is achieved; when the peep prevention is not needed, the second working mode is started, only the first light-emitting element emits light to normally display images, and based on the structural arrangement and display control, the application requirements of the peep prevention display and the normal display of the display panel with a large visual angle can be met.
Drawings
Fig. 1 is a top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a top view of another display panel according to an embodiment of the present invention;
FIG. 3 is a top view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic view of a first mode of operation of the cross-section of FIG. 1 taken along the direction AA';
FIG. 5 is a schematic illustration of a second mode of operation of the cross-section of FIG. 1 taken along the direction AA';
FIG. 6 is a schematic view of another cross-section along the direction AA' in FIG. 1;
FIG. 7 is an anode top view of the subpixel provided in FIG. 1;
FIG. 8 is an anode top view of the subpixel provided in FIG. 2;
FIG. 9 is an anode top view of the subpixel provided in FIG. 3;
FIG. 10 is a schematic view of another cross-section along the direction AA' in FIG. 1;
FIG. 11 is a schematic view of another cross-section along the direction AA' in FIG. 1;
FIG. 12 is a top view of another display panel according to an embodiment of the present invention;
FIG. 13 is an anode top view of the subpixel provided in FIG. 12;
FIG. 14 is another top view of an anode of the subpixel provided in FIG. 2;
fig. 15 is a schematic circuit diagram of a pixel driving circuit according to an embodiment of the present invention;
FIG. 16 is a schematic diagram showing a specific circuit structure of the pixel driving circuit in FIG. 15;
FIG. 17 is a schematic diagram showing a practical structure of the pixel driving circuit in FIG. 15;
fig. 18 is a schematic diagram of a specific circuit structure of the privacy control module of fig. 15;
fig. 19 is a schematic diagram of a specific circuit structure of another peep-proof control module in fig. 15;
FIG. 20 is a top view of a display panel according to the embodiment of the invention shown in FIG. 18;
fig. 21 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
At present, a common peep-proof display panel is usually controlled by adopting a grating/electrochromic material in a matching way, and the peep-proof display panel belongs to the field of realizing the related peep-proof function by additionally adding a part on the outer side of the display panel. Because the structure is additionally arranged on the outer side of the film layer structure of the display panel, the control in the display panel can not be realized, the display and the peeping prevention are independent, so that the peeping prevention effect of the display panel is general, and the display requirement of the peeping prevention of the display panel with a large visual angle, such as a business notebook and a business mobile phone, can not be met, and the peeping prevention requirement of the visual angle which is larger than 45 degrees or larger than 30 degrees is generally required.
Based on the technical problems, the inventor further researches and puts forward the technical scheme of the embodiment of the invention. Specifically, the embodiment of the invention provides a display panel, which comprises a substrate base plate, a plurality of sub-pixels positioned on one side of the substrate base plate and a shading layer; the at least one sub-pixel includes a first light emitting element and a second light emitting element; the light shielding layer comprises a light shielding part and a light transmitting part adjacent to the light shielding part, the light shielding part and the second light emitting element are at least partially overlapped along the direction perpendicular to the plane of the substrate, and the light transmitting part and the first light emitting element are at least partially overlapped; the display panel comprises a first working mode and a second working mode; in the first operation mode, both the first light emitting element and the second light emitting element emit light; in the second mode of operation, only the first light emitting element emits light.
According to the technical scheme, at least two light emitting elements are arranged in one sub-pixel, the first light emitting element is a main light emitting element, the second light emitting element is an auxiliary light emitting element, in a first working mode, the first light emitting element and the second light emitting element are controlled to emit light, at least part of emergent light of the second light emitting element is shielded by a shading part, a user only sees emergent light of the first light emitting element at a normal display view angle, and mixed light of the first light emitting element and the second light emitting element is seen at a side view angle, so that the brightness proportion of sub-pixels with different light emitting colors under the side view angle is changed, the contrast ratio of the display panel is reduced, and the side peep-proof effect is achieved; when no peeping prevention is needed, the second working mode is started, only the first light-emitting element emits light for normally displaying images, and through the arrangement, the peeping prevention display and normal display requirements of the display panel are met.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without making any inventive effort are intended to fall within the scope of the present invention.
Fig. 1 is a top view of a display panel according to an embodiment of the present invention; FIG. 2 is a top view of another display panel according to an embodiment of the present invention; FIG. 3 is a top view of another display panel according to an embodiment of the present invention; FIG. 4 is a schematic view of a first mode of operation of the cross-section of FIG. 1 taken along the direction AA'; fig. 5 is a schematic view of a second mode of operation of a section along direction AA' in fig. 1. Referring to fig. 1 to 5, a display panel 200 according to an embodiment of the present invention includes a substrate 20 and a plurality of sub-pixels 40 located on one side of the substrate 20, where at least one sub-pixel 40 includes a first light emitting element 41 and a second light emitting element 42; a light shielding layer 50, the light shielding layer 50 including a light shielding portion 51 and a light transmitting portion 52 adjacent to the light shielding portion 51, the light shielding portion 51 and the second light emitting element 42 at least partially overlapping, and the light transmitting portion 52 and the first light emitting element 41 at least partially overlapping, in a direction perpendicular to a plane in which the substrate 20 is located (as shown in a Z direction in the drawing); the display panel 200 includes a first operation mode and a second operation mode; in the first operation mode, both the first light emitting element 41 and the second light emitting element 42 emit light; in the second mode of operation, only the first light emitting element 41 emits light.
Specifically, as shown in fig. 1-5, the display panel 200 includes an OLED (Organic Light Emitting Diode ) display panel, an AMOLED (Active-Matrix Organic Light Emitting Diode, active matrix organic light emitting diode) display panel, a QLED (Quantum Dot Light Emitting Diodes, quantum dot light emitting diode) display panel, an LED (Light Emitting Diode ) display panel, a Micro LED (Micro Light Emitting Diode ) display panel, a Mini LED (Mini Light Emitting Diode, sub-millimeter light emitting diode) display panel, and the like, and the type of the display panel 200 is not limited in the embodiment of the present invention. Referring to fig. 4, the substrate 20 of the display panel may be a rigid material such as glass or silicon wafer, or a flexible material such as ultra-thin glass, metal foil or polymer plastic material, and the flexible or rigid substrate 20 may block oxygen and moisture to prevent moisture or impurities from diffusing into the display panel through the substrate 20.
As shown in fig. 4 and 5, the display panel 200 further includes a driving circuit layer 30 and a plurality of sub-pixels 40 at one side of the substrate 20. The driving circuit layer 30 includes a pixel driving circuit, which may be a circuit structure of 2T1C, 4T1C, 7T2C, 8T1C, 8T2C, etc., and includes a plurality of thin film transistors (Thin Film Transistor, TFTs), a storage capacitor, a metal wiring, etc., a drain electrode of the thin film transistors TFT is electrically connected to an anode electrode of the light emitting element, and the driving circuit layer 30 is for supplying a driving voltage to the light emitting element to drive the light emitting element to emit light.
With continued reference to fig. 1, the sub-pixels 40 may include a red sub-pixel R, a green sub-pixel G, a blue sub-pixel B, and the like, where at least one sub-pixel 40 is composed of a first light emitting element 41 and a second light emitting element 42, and for one sub-pixel, the color of light emitted by the first light emitting element 41 and the color emitted by the second light emitting element 42 included in the sub-pixel are the same, where the first light emitting element 41 is a main light emitting element, and the second light emitting element 42 is an auxiliary light emitting element. In the XY plane, the second light emitting element 42 at least partially surrounds the first light emitting element 41. In some embodiments, referring to fig. 1, one second light emitting element 42 surrounds the first light emitting element 41; in some embodiments, referring to fig. 2, 2 second light emitting elements 42 are located on both sides of the first light emitting element 41, respectively; in some embodiments, referring to fig. 3, one second light emitting element 42 is located on one side of the first light emitting element 41. In one sub-pixel 40, the types of the first light emitting element 41 and the second light emitting element 42 may be QLED, LED, micro LED, mini LED, QLED, or the like, and the embodiment of the present application is not particularly limited.
As shown in fig. 4 and 5, a light shielding layer 50 is provided on the light emitting side of the first light emitting element 41 and the second light emitting element 42, and the light shielding layer 50 includes a light absorbing material, which can be used for shielding light, such as black pigment. For example, the light shielding layer 50 may be black photoresist. In some embodiments, the light shielding layer 50 may be a whole layer structure, the light shielding layer 50 in the upper area of the light emitting side of the first light emitting element 41 is hollowed to obtain the light transmitting portion 52, and the front projection of the light transmitting portion 52 on the substrate 20 and the front projection of the first light emitting element 41 on the substrate 20 are at least partially overlapped along the Z direction in the figure, so as to ensure the light S emitted by the first light emitting element 41 1 And (5) emergent. In some embodiments, the front projection of the light-transmitting portion 52 on the substrate 20 may be disposed to cover the front projection of the first light-emitting element 41 on the substrate 20, so as to avoid the light-shielding layer 50 from emitting light to the first light-emitting element 41Light S 1 Is used to ensure the light-emitting efficiency of the first light-emitting element 41. In some embodiments, along the Z direction in the figure, the light shielding portion 51 and the second light emitting element 42 are disposed to at least partially overlap, and the light shielding portion 51 may serve to at least partially shield the light S emitted from the second light emitting element 42 2 Is effective in (1).
The display panel provided in this embodiment of the present application has multiple display modes, such as a first working mode and a second working mode, where the first working mode may be a peep-proof mode, and the second working mode may be a normal display image mode of the display panel 200.
With continued reference to fig. 4, in some applications requiring privacy protection, the display panel 200 needs a peep-proof function, the display panel 200 operates in the first operation mode, the driving circuit layer 30 provides driving currents to the first light emitting element 41 and the second light emitting element 42, the first light emitting element 41 and the second light emitting element 42 emit light S, and the first light emitting element 41 emits light S 1 The second light emitting element 42 emits light S 2 Most of the light S 1 After passing through the light-transmitting portion 52, the color image is normally displayed, and when the user views the display panel 200 at the front view angle, only the light S is viewed 1 Carrying a color picture; most of the light S emitted from the second light-emitting element 42 2 Is blocked by the light shielding part 51, and a small part of the large-view-angle light S 2 Light S emitted from one sub-pixel 40 is emitted after obliquely passing through the light-transmitting portion 52 1 And light S 2 Forming a mixed light, and so on, as the light S exits the plurality of sub-pixels 40 1 And light S 2 The brightness ratio of the sub-pixels 40 forming the mixed light and different light emission colors is changed, which easily causes the contrast of the side view angle display panel 200 to be reduced, and when the user views on the left and right sides of the display panel 200, the image viewed by the user is a blurred or unreal display picture, thereby achieving the peep-proof effect.
With continued reference to fig. 5, when the display panel 200 is not in the peep-proof mode, the driving circuit layer 30 only provides the driving current to the first light emitting element 41 to drive the first light emitting element 41 to emit light, the second light emitting element 42 does not emit light, and the first light emitting element 41 light ray S 1 When the user views at the front view angle of the display panel 200, only the light S is viewed 1 And carrying a color picture.
When the brightness of two viewing directions on the same plane is half of the brightness of the normal direction of the display screen (display panel), the included angle between the two viewing directions in the normal direction of the display screen is called a viewing angle. The larger the viewing angle of the display, the more audience groups the wider the coverage area, and vice versa. The positive viewing angle means that the user viewing direction is directed to the display panel along a normal direction perpendicular to the display panel; the side view angle means that the user viewing direction forms an included angle with the normal direction of the display panel to look at the display panel.
It should be noted that, the arrangement of the sub-pixels 40 in the display panel 200 provided in the embodiment of the present application is not limited to the arrangement shown in fig. 1 to 3 in the embodiment of the present application, but may be other pixel arrangements, which are not described herein again; the display panel 200 further includes other film layers, such as a pixel defining layer 60, a thin film encapsulation layer (not shown), etc., which cooperate to realize the display function of the display device, which is not described herein.
In summary, the display panel provided by the embodiment of the invention. At least two light emitting elements are arranged in one sub-pixel, a first light emitting element is a main light emitting element, a second light emitting element is an auxiliary light emitting element, in a first working mode, the first light emitting element and the second light emitting element are controlled to emit light, at least part of emergent light rays of the second light emitting element are shielded by a shading part, a user only sees the emergent light rays of the first light emitting element at a normal display visual angle, and sees the mixed light rays of the first light emitting element and the second light emitting element at a side view angle, and the mixed light rays can change the brightness proportion of the sub-pixel and the contrast ratio of a display panel, so that the peep-proof effect is achieved; when the peep prevention is not needed, the second working mode is started, only the first light-emitting element emits light to normally display images, and based on the structural arrangement and display control, the application requirements of the peep prevention display and the normal display of the display panel with a large visual angle can be met.
Fig. 6 is a schematic view of another cross section along the AA' direction in fig. 1. On the basis of the above-described embodiment, referring to fig. 6, the first light emitting element 41 includes a first electrode 411, a first light emitting layer 412, and a second electrode 413 which are stacked, and the second light emitting element 42 includes a third electrode 421, a second light emitting layer 422, and a fourth electrode 423 which are stacked; the display panel 200 further includes a pixel defining layer 60, the pixel defining layer 60 including a plurality of pixel openings 211; at least a portion of the first light emitting layer 412 and at least a portion of the second light emitting layer 422 are located within the same pixel opening 211; the first electrode 411 and the third electrode 421 are spaced apart in a direction parallel to a plane of the substrate 20 (as shown in the XY plane), and at least a portion of the first electrode 411 and at least a portion of the third electrode 421 are exposed in the same pixel opening 211.
Specifically, as shown in fig. 1 and 6, in one subpixel 40, the types of the first light emitting element 41 and the second light emitting element 41 are exemplified as OLEDs. The first light emitting element 41 includes a first electrode 411, a first light emitting layer 412, and a second electrode 413 stacked on a side away from the substrate 20, the second light emitting element 42 includes a third electrode 421, a second light emitting layer 422, and a fourth electrode 423 stacked on a side away from the substrate 20, the first electrode 411 is an anode of the first light emitting element 41, the second electrode 412 is a cathode of the first light emitting element 41, the third electrode 421 is an anode of the second light emitting element 42, and the fourth electrode 423 is a cathode of the second light emitting element 42. Wherein the first electrode 411 and the third electrode 421 may be layered but electrically insulated, and in a possible embodiment, the anode may be cut, or the first electrode 411 and the third electrode 421 may be spaced apart and insulated. The first light emitting layer 411 and the second light emitting layer 422 may be provided in the same layer, and the light emitting material may be a low molecular or high molecular organic material; the second electrode 413 and the fourth electrode 423 may be provided in the same layer, and a transparent conductive material such as ITO (indium tin oxide), IZO (indium zinc oxide), ITO/Ag/ITO, or the like is used. As an example, the second electrode 413 and the fourth electrode 423 are of a whole layer structure, and supply the same driving voltage; the first light emitting layer 411 and the second light emitting layer 422 are of a whole layer structure, and in the embodiment of the application, the whole layer structure is adopted, so that the difficulty of the preparation process can be reduced.
It should be noted that, the first light emitting element and the second light emitting element further include a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer (not shown in the drawings), which are not shown in the embodiments of the present application, and the light emitting layer in the embodiments of the present application specifically refers to a layer that emits light actually.
On the basis of the above-described embodiment, with continued reference to fig. 6, the light shielding portion 51 overlaps with the space between the first electrode 11 and the third electrode 421 in the direction perpendicular to the plane of the substrate.
Specifically, as shown in fig. 6, the light shielding portion 51 is extended to shield the interval between the first electrode 11 and the third electrode 421, so as to avoid the exposure of the metal layer and ensure the consistency of the display effect of the display screen of the display panel.
With continued reference to fig. 6, the display panel 200 further includes a pixel defining layer 60, where the pixel defining layer 60 may be made of an organic material, and a plurality of pixel openings 211 are formed in the pixel defining layer 60, where the pixel openings 211 are used to define positions of the sub-pixels 40, sizes of light emitting areas, and the like, at least a portion of the first light emitting layer 412 and at least a portion of the second light emitting layer 422 are disposed in the same pixel opening 211, and at least a portion of the first electrode 411 and at least a portion of the third electrode 421 are exposed in the same pixel opening 211, so that the first light emitting element 41 and the second light emitting element 42 are disposed in the same pixel opening 211. When the display panel 200 starts the first operation mode, the user can see the mixed light emitted from the first light emitting element 41 and the second light emitting element 42 in the same sub-pixel 40 at the side view angle, so as to achieve the purpose of peeping-proof display of the display panel.
FIG. 7 is an anode top view of the subpixel provided in FIG. 1; FIG. 8 is an anode top view of the subpixel provided in FIG. 2; fig. 9 is a top view of an anode of the subpixel provided in fig. 3. On the basis of the above embodiment, as shown in connection with fig. 7-8, the orthographic projection of the third electrode 421 on the substrate 20 at least partially surrounds the orthographic projection of the first electrode 411 on the substrate 20 within the same sub-pixel 40.
Specifically, as shown in connection with fig. 1 and 7, in some embodiments, within the same sub-pixel 40, the third electrode 421 surrounds the front projection of the first electrode 411 on the substrate 20 at the front projection portion of the substrate 20; referring to fig. 2 and 8, in some embodiments, the front projection of the third electrode 421 onto the substrate 20 is located on both sides of the front projection of the first electrode 411 onto the substrate 20 within the same sub-pixel 40; as shown in fig. 3 and 9, in some embodiments, the orthographic projection of the third electrode 421 onto the substrate 20 is located on one side of the orthographic projection of the first electrode 411 onto the substrate 20, where the third electrode 421 and the first electrode 411 may be co-layered or different.
On the basis of the above embodiment, as further shown in fig. 7, the third electrode 421 includes a notch area 421a, the first electrode 411 includes a first area 411a and a second area 411b, the first area 411a is located inside the pattern surrounded by the third electrode 421, and a part of the second area 411b is located outside the pattern surrounded by the third electrode 421, and the notch area 421a extends into the pattern surrounded by the third electrode 421 to be electrically connected with the first area 411 a.
Specifically, as shown in fig. 7, the third electrode 421 and the first electrode 411 are disposed in the same layer, and the third electrode 421 and the first electrode 411 may be fabricated by a "patterning" process, where the third electrode 421 surrounds the first electrode 411 and a notch area 421a is disposed. The first area 411a is a main anode area of the first light emitting element 41, and the second area 411b extends from the notch area 421a to the outside of the pattern surrounded by the third electrode 421. For the electrical connection mode between the anode and the driving circuit layer, in a possible implementation mode, the third electrode 421 and the second region 411b of the first electrode 411 may be electrically connected to the thin film transistor TFT of the driving circuit layer by a punching mode (as shown by a virtual circle O in the figure); further, by reasonably controlling the size of the notch area 421a, a space exists between the third electrode 421 and the first electrode 411 and is electrically insulated, and meanwhile, the second light-emitting element 42 corresponding to the third electrode 421 can surround the first light-emitting element 41 as much as possible, so that in the first display mode of the display panel 200, the display panel 200 is facilitated to be peeped at multiple viewing angles, and the peeping prevention performance of the display panel is improved.
The "patterning" herein specifically refers to a non-integral layer structure, that is, a structure in which an integral layer of material is formed and then a specific shape is engraved in the process of manufacturing; or, the whole layer of material is formed in the manufacturing process, and then the pattern structure with other preparation process shapes is adopted, so that the implementation of the patterning preparation process is not limited.
FIG. 10 is a schematic view of another cross-section along the direction AA' in FIG. 1; fig. 11 is a schematic view of another cross section along the AA' direction in fig. 1. On the basis of the above embodiment, as further shown in fig. 4 to 6 and fig. 10 and 11, the projection of at least part of the area of the first light emitting element 41 on the plane of the substrate 20 is located in the projection of the light transmitting portion 52 on the substrate 20; at least a part of the area of the second light emitting element 42 is projected on the plane of the substrate 20 in a projection of the light shielding portion 51 on the plane of the substrate 20.
Specifically, as shown in fig. 4-6 and 10, in some embodiments, the projection of the first light emitting element 41 on the plane of the substrate 20 is located in the projection of the light transmitting portion 52 on the substrate 20; referring to fig. 11, the projection of the first light emitting element 41 on the plane of the substrate 20 is located in the projection of the light transmitting portion 52 on the substrate 20; referring to fig. 4-6 and 11, in some embodiments, the projection of the second light emitting element 42 on the plane of the substrate 20 is located in the projection of the light shielding portion 51 on the plane of the substrate 20; as shown in fig. 10, in some embodiments, the projection of the portion of the second light emitting element 42 on the plane of the substrate 20 is located in the projection of the light shielding portion 51 on the plane of the substrate 20.
In the present application, by reasonably arranging the light shielding portion 51 in the projection area of the substrate 20, in the first working mode and the second working mode of the display panel 200, the light S emitted by the first light emitting element 41 1 Can be emitted from the light-transmitting portion 52; in the first operation mode, a part of the light S emitted from the second light emitting element 42 2 Is blocked by the light shielding part 51, and a part of the light S 2 Obliquely emitted from the light-transmitting portion 52, and the portion of the obliquely emitted light S 2 As interference light, the brightness ratio of the sub-pixels 40 can be influenced, the contrast ratio of the side view angle display panel 200 is reduced, and the side surface protection of the display panel is realizedThe peeping effect.
On the basis of the above-described embodiment, as shown in fig. 3 and 9, in the same sub-pixel 40, the third electrode 421 and the first electrode 411 are arranged in the first direction (as shown in the X positive direction in the figure) or in the opposite direction to the first direction; wherein the first direction is parallel to the plane of the substrate 20.
Specifically, referring to fig. 9, in some embodiments, two light emitting elements may be arranged left and right within the same sub-pixel 40, for example, the third electrode 421 is located on the left side of the first electrode 411; further referring to fig. 3, the second light emitting element 42 may be located on the left side of the first light emitting element 41, where the light emitted obliquely by the second light emitting element 42 after being blocked by the light shielding layer 51 is mixed with the right light of the first light emitting element 41, so as to affect the brightness ratio on the right side of the first light emitting element 41, thereby realizing the right peep prevention of the display panel.
In other embodiments, for example, the third electrode 421 is located on the right side of the first electrode 411, so that the second light-emitting element 42 can be located on the right side of the first light-emitting element 41, and the light emitted obliquely by the second light-emitting element 42 after being blocked by the light-shielding layer 51 is mixed with the left light of the first light-emitting element 41, so as to affect the brightness ratio on the left side of the first light-emitting element 41, thereby realizing the left peeping prevention of the display panel.
In other embodiments, the first direction may be the Y positive direction in the drawing, and in the same sub-pixel 40, the two light emitting elements may be arranged up and down, for example, the third electrode 421 is located on the upper side of the first electrode 411, as shown in fig. 3, and the second light emitting element 42 may be located on the upper side of the first light emitting element 41, where the light emitted obliquely from the second light emitting element 42 after being blocked by the light shielding layer 51 is mixed with the light on the lower side of the first light emitting element 41, so as to affect the brightness ratio on the lower side of the first light emitting element 41, thereby realizing the lower side peep prevention of the display panel.
In other embodiments, for example, the third electrode 421 is located at the lower side of the first electrode 411, so that the second light-emitting element 42 can be located at the lower side of the first light-emitting element 41, and the light emitted obliquely by the second light-emitting element 42 after being blocked by the light-shielding layer 51 is mixed with the light on the upper side of the first light-emitting element 41 to affect the brightness ratio on the upper side of the first light-emitting element 41, so that the arrangement is such that the upper side peeping prevention of the display panel can be realized.
In other embodiments, the first direction may be any direction parallel to the plane of the substrate 20, which is not shown in the embodiments of the present application.
FIG. 12 is a top view of another display panel according to an embodiment of the present invention; fig. 13 is a top view of one anode of the subpixel provided in fig. 12. On the basis of the above-described embodiment, as shown in fig. 12 and 13, the sub-pixel 40 includes the first sub-pixel 40a and the second sub-pixel 40b adjacently disposed in the first direction or in the second direction; within the first sub-pixel 40a, the third electrode 421 and the first electrode 411 are arranged in the first direction; in the second sub-pixel 40b, the third electrode 421 and the first electrode 411 are arranged in the opposite direction to the first direction; wherein the first direction and the second direction intersect.
Specifically, with reference to fig. 12 and 13, the first direction is taken as the X direction in the figure, and the second direction is taken as the Y direction in the figure. In the display panel 200, there are adjacent first and second sub-pixels 40a and 40b arranged in the X direction in the drawing, the third electrodes 421 in the first and second sub-pixels 40a and 40b are located on different sides of the first electrode 411, and the second light emitting elements 42 in the obtained first and second sub-pixels 40a and 40b are located on different sides of the first light emitting element 41. For example, in the first sub-pixel 40a, the third electrode 421 is located on the left side of the first electrode 411 as shown in fig. 13, and the second light emitting element 42 is located on the left side of the first light emitting element 41 as shown in fig. 12; in the second sub-pixel 40b, as shown in fig. 13, the third electrode 421 is located on the right side of the first electrode 411, and the second light emitting element 42 is located on the right side of the first light emitting element 41.
When the display panel 200 is in the first operation mode, the second light emitting element 42 emits light, and the emitted light breaks up the brightness ratio of the first sub-pixel 40a and the second sub-pixel 40b, so as to reduce the contrast ratio of the mixed light emitted from the first sub-pixel 40a and the second sub-pixel 40 b. And so on, the positions of the third electrode 421 and the first electrode 411 in the third sub-pixel 40c are continuously set, for example, the third electrode 421 in the third sub-pixel 40c is set at the left side of the first electrode 411, or the third electrode 421 in the third sub-pixel 40c and the right side (not shown in the figure) of the first electrode 411 are set differently by setting the positional relationship between the third electrode 421 and the first electrode 411 corresponding to different sub-pixels 40, and in the first operation mode of the display panel 200, the brightness ratio of the emergent light under the oblique viewing angle of the display panel 200 can be disturbed, so as to achieve the purpose of reducing the contrast ratio of the display panel 200, thereby achieving the purpose of oblique viewing angle peeping prevention.
On the basis of the above-described embodiment, as shown in fig. 12 and 13, the light emission color of the first subpixel 40a and the second subpixel 40b is the same.
Specifically, the positional relationship between the third electrode 421 and the first electrode 411 in the first sub-pixel 40a and the second sub-pixel 40b that are adjacent and emit light with the same color is differently set, so that in the first operation mode of the display panel 200, the brightness ratio of the mixed light emitted obliquely by the sub-pixels 40 with different adjacent and emit light can be ensured to be changed, and the purpose of anti-peeping at oblique viewing angles is achieved.
On the basis of the above embodiment, with continued reference to fig. 8, the third electrode 421 includes a first sub-electrode 421a and a second sub-electrode 421b; within the same sub-pixel 40, the first sub-electrode 421a, the first electrode 411, and the second sub-electrode 421b are arranged along the first direction, and the first sub-electrode 421a and the second sub-electrode 421b are electrically connected by the first wiring 23; wherein the first direction is parallel to the plane of the substrate 20.
Specifically, as shown in fig. 2 and 8, two second light emitting elements 42 may be disposed on both sides of the first light emitting element 41 in the same sub-pixel 40, and anodes of the two second light emitting elements 42 correspond to the first sub-electrode 421a and the second sub-electrode 421b, respectively, where the first sub-electrode 421a and the second sub-electrode 421b are located on both sides of the first electrode 411. When the first sub-electrode 421a, the second sub-electrode 421b, and the first electrode 411 are in the same layer, the first sub-electrode 421a and the second sub-electrode 421b may be electrically connected by the first wiring 23 to achieve driving voltage transmission. The first trace 23 may be the same layer as the first sub-electrode 421a or the second sub-electrode 421b, or different layer.
Fig. 14 is a top view of another anode of the subpixel provided in fig. 2. On the basis of the above-described embodiment, as shown in fig. 2 and 14, along the direction perpendicular to the substrate 20 (as shown in the Z direction in the drawing), the first trace 23 at least partially overlaps the first electrode 411, and the first trace 23 is located on the side of the first electrode 411 near the substrate 20.
Specifically, the first trace 23 may be disposed in different layers from the first sub-electrode 421a and the second sub-electrode 421b, and the first trace 23 may be located on a side of the first sub-electrode 421a and the second sub-electrode 421b near the substrate 20, as shown by a dotted line between the first sub-electrode 421a and the second sub-electrode 421b in fig. 14. The first trace 23 is located on an M3 metal layer, and the M3 metal layer may be a connection electrode layer between a drain electrode of the thin film transistor TFT and the light emitting element. The first wiring 23 is arranged to at least partially overlap with the first electrode 411, and the first wiring 23 is shielded by the first electrode 411, so that the display effect is prevented from being influenced by the first wiring 23.
It should be noted that, in the drawings of the embodiments of the present application, the first direction is the X direction in the drawings, and the second direction is the Y direction in the drawings, which is only illustrative, and not limiting of the embodiments of the present application.
Taking the light emitting element as an example of the OLED according to the above embodiment, as shown in fig. 8, the first sub-electrode 421a and the second sub-electrode 421b are symmetrically disposed with respect to the first electrode 411 in the same sub-pixel 40, and as shown in fig. 2, the two second light emitting elements 42 in the same sub-pixel 40 can be symmetrically disposed with respect to the first light emitting element 41, so as to realize the peep-proof display on both sides of the display panel.
Fig. 15 is a schematic circuit diagram of a pixel driving circuit according to an embodiment of the present invention. On the basis of the above embodiment, the sub-pixel further includes a pixel driving circuit, the pixel driving circuit drives the first light emitting element 41 and the second light emitting element 42 to emit light, the pixel driving circuit includes a driving module 1, a data writing module 2 and a peep-proof control module 3, and a control end a1 of the driving module 1 is electrically connected with the first node N1; the control end a1 of the Data writing module 2 is electrically connected with the first scanning signal line S1, the first end a1 of the Data writing module 2 is electrically connected with the Data signal line Data, and the second end a3 of the Data writing module 2 is electrically connected with the first end a2 of the driving module 1; the control end a1 of the peep-proof control module 3 is electrically connected with the second scanning signal line S2, the first end a2 of the peep-proof control module 3 is electrically connected with the second end a3 of the driving module 1, the second end a3 of the peep-proof control module 3 is electrically connected with the third electrode 421 of the second light-emitting element 42, and the fourth electrode 423 of the second light-emitting element 42 is electrically connected with the second power signal line VSS.
Specifically, as shown in fig. 15, the first light emitting element 41 and the second light emitting element 42 in fig. 15 may be OLEDs, and the pixel driving circuit drives the OLEDs to emit light generally includes three phases, namely, an initialization phase, a data writing phase, and a light emitting phase. The driving module 1 is used for providing driving current to the first light emitting element 41 and the second light emitting element 42, and the OLED emits light in response to the driving current; the OLED is a current driving element, a power supply voltage is provided through a first power supply signal line VDD, and the data writing module 2 controls the current output by the driving module 1 through a data signal to realize the adjustment of the luminous brightness of the OLED; in the first operation mode of the display panel, the peep-proof control module 3 is used for controlling the second light-emitting element 42 to emit light. The first end a2 of the peep-proof control module 3 and the second end a3 of the driving module 1 may be directly electrically connected or indirectly electrically connected, which is not limited in the embodiment of the present application; the first electrode 411 of the first light emitting element 41 is an anode, and the second electrode 413 is a cathode; the third electrode 421 of the second light emitting element 42 is an anode, the fourth electrode 423 is a cathode, the first power signal line VDD supplies an anode voltage, and the second power signal line VSS supplies a cathode voltage.
According to the technical scheme, the peep-proof control module and the second light-emitting element are arranged in the pixel driving circuit of the array substrate, and the second light-emitting element in one sub-pixel is independently controlled by the peep-proof control module, so that the first light-emitting element and the second light-emitting element in the same sub-pixel can emit light simultaneously in a first working mode of the display panel, the brightness of the sub-pixel is changed by utilizing the emergent light of the second light-emitting element, the brightness proportion of a plurality of sub-pixels is changed, the contrast ratio of the display panel is reduced, and the peep-proof display effect of the side view angle of the display panel is achieved.
Optionally, with continued reference to fig. 15, the pixel driving circuit further includes a first initialization module 4, a threshold compensation module 5, a first light emitting control module 6, a second light emitting control module 7, a second initialization module 8, and a storage module 9, where a control end a1 of the first initialization module 4 is electrically connected to the third scan signal line S3, a first end a2 of the first initialization module 4 is electrically connected to the first reference signal line Ref1, and a second end a3 of the first initialization module 4 is electrically connected to the first node N1; the control end a1 of the threshold compensation module 5 is electrically connected with the first scanning signal line S1, the first end a2 of the threshold compensation module 5 is electrically connected with the second end a3 of the driving module 1, and the second end a3 of the threshold compensation module 5 is electrically connected with the first node N1; the control end a1 of the first light emitting control module 6 is electrically connected with the enable signal line Emit, the first end a2 of the first light emitting control module 6 is electrically connected with the first power signal line VDD, and the second end a3 of the first light emitting control module 6 is electrically connected with the first end a2 of the driving module 1; the control end a1 of the second light emitting control module 7 is electrically connected to the enable signal line Emit, the first end a2 of the second light emitting control module 7 is electrically connected to the second end a3 of the driving module 1, the second end a3 of the second light emitting control module 7 is electrically connected to the first electrode 411 of the first light emitting element 41, and the second electrode 413 of the first light emitting element 41 is electrically connected to the second power signal line VSS; the control end a1 of the second initialization module 8 is electrically connected with the first scanning signal line S1 or the third scanning signal line S3, the first end a2 of the second initialization module 8 is electrically connected with the second reference signal line Ref2, and the second end a3 of the second initialization module 8 is electrically connected with the second end a3 of the second light emitting control module 7; the first terminal c1 of the memory module 9 is electrically connected to the first power signal line VDD, and the second terminal c2 of the memory module 9 is electrically connected to the first node N1.
It can be understood that the pixel driving circuit provided in this embodiment is a pixel driving circuit with threshold compensation, and the first initializing module 4 is configured to initialize the potential of the first end a2 of the driving module 1 in the initializing stage; the threshold compensation module 5 is used for writing a compensation signal into the control end a1 of the driving module 1 before the light-emitting stage; the first light-emitting control module 6 and the second light-emitting control module 7 are used for conducting in a light-emitting stage and controlling the first light-emitting element 41 to emit light; the first initialization module 4 and the second initialization module 6 can work in different time periods, so that two initialization signals can be provided by the same signal line at different times, and in the embodiment, the first reference signal line Ref1 and the second reference signal line Ref2 are the same signal line, so that the arrangement can reduce the number of wires and simplify the structure of a pixel driving circuit; the memory module 9 is used for maintaining the potential of the control terminal a1 of the driving module 1 in the light emitting stage.
FIG. 16 is a schematic diagram showing a specific circuit structure of the pixel driving circuit in FIG. 15; fig. 17 is a schematic diagram of a practical structure of the pixel driving circuit in fig. 15. Referring to fig. 16, optionally, the pixel driving circuit provided in this embodiment includes a capacitor (8T 1C) with 8 transistors, the peep-proof control module 3 includes a first transistor T1, the data writing module 2 includes a second transistor T2, the driving module 1 includes a driving transistor T0, the first initialization module 4 includes a third transistor T3, the threshold compensation module 5 includes a fourth transistor T4, the first light emitting control module 6 includes a fifth transistor T5, the second light emitting control module 7 includes a sixth transistor T6, the second initialization module 8 includes a seventh transistor, and the storage module 9 includes a first capacitor C1. Referring to fig. 17, the pixel driving circuit provided in this embodiment includes an active layer 21, a first metal layer 22, a second metal layer 23, and a third metal layer 24, which are sequentially stacked on one side of a substrate 20, wherein the active layer 21 is configured to form conductive channels of a driving transistor T0, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, and a seventh transistor T7, and a first scanning signal line S1, a second scanning signal line S2, an enable signal line Emit, and a second plate C12 of a first capacitor C1 are disposed on the first metal layer 22; the first reference signal line Ref1, the second reference signal line Ref2, and the first plate C11 of the first capacitor C1 are disposed on the second metal layer 23; the Data signal line Data and the first power signal line VDD are disposed on the third metal layer 24, and the different layers can be electrically connected through the via hole. In which, the driving circuit structure of 1 OLED is exemplarily shown in fig. 17, and an insulating layer between layers is omitted, 411 'is an anode output terminal of the first light emitting element 41, 421' is an anode output terminal of the second light emitting element 42, 411 'is electrically connected to the first electrode 411, and 421' is electrically connected to the third electrode 421.
It can be understood that the array arrangement of the plurality of pixel driving circuits, each pixel driving circuit is used for controlling one OLED, in the preparation process of the pixel driving circuits, the same film layer adopts the same process, the active layers between different pixel driving circuits can be in an integrated graphic structure or a plurality of independent graphic structures, the embodiment of the application is not particularly limited, wherein the active layers are not conductive, partial region conduction is realized by doping the active layers, and the conductive active layers can be electrically connected with the wiring layers to replace partial wiring.
Fig. 18 is a schematic diagram of a specific circuit structure of the privacy control module of fig. 15; fig. 19 is a schematic diagram of a specific circuit structure of another peep-proof control module in fig. 15; fig. 20 is a top view of a display panel according to the embodiment of the invention in fig. 18. On the basis of the above embodiment, referring to fig. 16, the peep-proof control module 3 includes a first transistor T1, referring to fig. 18, the display panel further includes a first switching unit TFT1 and a second switching unit TFT2, a first terminal a1 of the first switching unit TFT1 is electrically connected to the first voltage terminal D1, a second terminal a2 of the first switching unit TFT1 is electrically connected to the second scanning signal line S2, a first terminal a3 of the second switching unit TFT2 is electrically connected to the second voltage terminal D2, and a second terminal a4 of the second switching unit TFT2 is connected to the second scanning signal line S2; in the first operation mode, the first switching unit TFT1 is turned on, the second switching unit TFT2 is turned off, the first voltage provided by the first voltage terminal D1 is transmitted to the second scanning signal line S2, the first voltage controls the first transistor T1 to be turned on, and the second light emitting element 42 emits light; in the second operation mode, the first switching unit TFT1 is turned off, the second switching unit TFT2 is turned on, the second voltage provided by the second voltage terminal D2 is transmitted to the second scan signal line S2, the second voltage controls the first transistor T1 to be turned off, and the second light emitting element 42 does not emit light.
Specifically, as shown in connection with fig. 16 and 18, the display panel further includes a first switching unit TFT1 and a second switching unit TFT2, and in some embodiments, the first voltage VGH of the first voltage terminal D1 is higher than the second voltage VGL of the second voltage terminal D2, or; in some embodiments, the first voltage VGL of the first voltage terminal D1 is lower than the second voltage VGH of the second voltage terminal D2. Alternatively, referring to fig. 16, the first transistor T1 is a P-type transistor, and the first voltage is smaller than the second voltage, or alternatively; the first transistor T1 is an N-type transistor, and the first voltage is greater than the second voltage.
For example, the first transistor T1 in fig. 16 is a P-type transistor, and the first voltage VGL of the first voltage terminal D1 in fig. 18 is lower than the second voltage VGH of the second voltage terminal D2.
When the display panel is in the first operation mode, i.e. the peep-proof display, the first switch unit TFT1 is turned on, the second switch unit TFT2 is turned off, the second scan signal line S2 transmits a low level signal, the first transistor T1 is turned on, the second light emitting element 42 emits light, and the peep-proof mode is started.
When the display panel is in the second operation mode, i.e. not peeping-preventing, the first switch unit TFT1 is turned off, the second switch unit TFT2 is turned on, the second scan signal line S2 transmits a high level signal, the first transistor T1 is turned off, the second light emitting element 42 does not emit light, and the peeping-preventing mode is turned off.
By the above scheme, the one-touch peep-proof function of the display panel 200 can be realized.
In other embodiments, referring to fig. 19, an exemplary P-type transistor is taken as the first transistor T1 in fig. 16, and the first voltage VGH of the first voltage terminal D1 in fig. 19 is higher than the second voltage VGL of the second voltage terminal D2.
When the display panel is in the first operation mode, i.e. the peep-proof display, the first switch unit TFT is turned off, the second switch unit TFT2 is turned on, the second scanning signal line S2 transmits a low-level signal, the first transistor T1 is turned on, the second light emitting element 42 emits light, and the peep-proof mode is started.
When the display panel is in the second operation mode, i.e. not peeping-preventing, the first switch unit TFT1 is turned on, the second switch unit TFT2 is turned off, the second scan signal line S2 transmits a high level signal, the first transistor T1 is turned off, the second light emitting element 42 does not emit light, and the peeping-preventing mode is turned off.
Referring to fig. 20, the display panel 200 includes a display area AA for normal display and a non-display area NA for setting various signal traces, frame packages, and the like, at least partially surrounding the display area. A possible implementation manner may be to arrange the second scanning signal line S2 in the non-display area NA and extend along the X direction in the figure; the first switch unit TFT1 and the second switch unit TFT2 are respectively located in non-display areas NA on two sides of the display area AA, and extend along the Y direction in the figure to be connected with the driving chip IC, so that the one-key peep-proof display function of the display panel is provided.
Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 21 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 21, the display device includes any one of the display panels provided in the foregoing embodiments. Illustratively, as shown in fig. 21, the display device 300 includes a display panel 200. Therefore, the display device also has the advantages of the display panel in the above embodiment, and the same points can be understood by referring to the explanation of the display panel, and the description thereof will not be repeated.
The display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 21, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., which is not particularly limited by the embodiment of the invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (16)

1. A display panel, comprising:
a substrate and a plurality of sub-pixels located at one side of the substrate, at least one of the sub-pixels including a first light emitting element and a second light emitting element;
a light shielding layer including a light shielding portion and a light transmitting portion adjacent to the light shielding portion, the light shielding portion and the second light emitting element at least partially overlapping in a direction perpendicular to a plane in which the substrate is located, the light transmitting portion and the first light emitting element at least partially overlapping;
the display panel comprises a first working mode and a second working mode; in the first operation mode, the first light-emitting element and the second light-emitting element both emit light; in the second operation mode, only the first light emitting element emits light.
2. The display panel according to claim 1, wherein the first light-emitting element includes a first electrode, a first light-emitting layer, and a second electrode which are stacked, and wherein the second light-emitting element includes a third electrode, a second light-emitting layer, and a fourth electrode which are stacked; the display panel further includes a pixel definition layer including a plurality of pixel openings; at least part of the first light emitting layer and at least part of the second light emitting layer are positioned in the same pixel opening;
And a space is arranged between the first electrode and the third electrode along the direction parallel to the plane of the substrate base plate, and at least part of the first electrode and at least part of the third electrode are exposed in the same pixel opening.
3. The display panel of claim 2, wherein the orthographic projection of the third electrode on the substrate at least partially surrounds the orthographic projection of the first electrode on the substrate within the same subpixel.
4. A display panel according to claim 3, wherein the third electrode comprises a notch region, the first electrode comprises a first region and a second region, the first region is located inside the pattern surrounded by the third electrode, a part of the second region is located outside the pattern surrounded by the third electrode, and the notch region extends into the pattern surrounded by the third electrode and is electrically connected with the first region.
5. The display panel according to claim 2, wherein the light shielding portion overlaps with a space between the first electrode and the third electrode in a direction perpendicular to a plane in which the substrate base plate is located.
6. The display panel according to claim 2, wherein the third electrode and the first electrode are arranged in a first direction or in a direction opposite to the first direction within the same sub-pixel;
the first direction is parallel to the plane of the substrate.
7. The display panel of claim 6, wherein the subpixels comprise first and second subpixels disposed adjacent in the first direction or in the second direction;
within the first subpixel, the third electrode and the first electrode are arranged along the first direction; within the second subpixel, the third electrode and the first electrode are arranged in a direction opposite to the first direction; wherein the first direction and the second direction intersect.
8. The display panel of claim 7, wherein the first subpixel and the second subpixel have the same color of light.
9. The display panel of claim 2, wherein the third electrode comprises a first sub-electrode and a second sub-electrode;
in the same sub-pixel, the first sub-electrode, the first electrode and the second sub-electrode are arranged along a first direction, and the first sub-electrode and the second sub-electrode are electrically connected by a first wiring;
The first direction is parallel to the plane of the substrate.
10. The display panel of claim 9, wherein the first sub-electrode and the second sub-electrode are symmetrically disposed about the first electrode within the same sub-pixel.
11. The display panel of claim 9, wherein the first trace at least partially overlaps the first electrode in a direction perpendicular to the substrate, the first trace being located on a side of the first electrode adjacent to the substrate.
12. The display panel according to claim 1, wherein the sub-pixel further includes a pixel driving circuit that drives the first light emitting element and the second light emitting element to emit light, the pixel driving circuit comprising:
the control end of the driving module is electrically connected with the first node;
the control end of the data writing module is electrically connected with the first scanning signal line, the first end of the data writing module is electrically connected with the data signal line, and the second end of the data writing module is electrically connected with the first end of the driving module;
The control end of the peep-proof control module is electrically connected with the second scanning signal line, the first end of the peep-proof control module is electrically connected with the second end of the driving module, the second end of the peep-proof control module is electrically connected with the third electrode of the second light-emitting element, and the fourth electrode of the second light-emitting element is electrically connected with the second power signal line.
13. The display panel of claim 12, wherein the pixel driving circuit further comprises:
the control end of the first initialization module is electrically connected with the third scanning signal line, the first end of the first initialization module is electrically connected with the first reference signal line, and the second end of the first initialization module is electrically connected with the first node;
the control end of the threshold compensation module is electrically connected with the first scanning signal line, the first end of the threshold compensation module is electrically connected with the second end of the driving module, and the second end of the threshold compensation module is electrically connected with the first node;
the control end of the first light-emitting control module is electrically connected with the enabling signal line, the first end of the first light-emitting control module is electrically connected with the first power signal line, and the second end of the first light-emitting control module is electrically connected with the first end of the driving module;
The control end of the second light-emitting control module is electrically connected with the enabling signal line, the first end of the second light-emitting control module is electrically connected with the second end of the driving module, the second end of the second light-emitting control module is electrically connected with the first electrode of the first light-emitting element, and the second electrode of the first light-emitting element is electrically connected with the second power signal line;
the control end of the second initialization module is electrically connected with the first scanning signal line or the third scanning signal line, the first end of the second initialization module is electrically connected with the second reference signal line, and the second end of the second initialization module is electrically connected with the second end of the second light-emitting control module;
and the first end of the storage module is electrically connected with the first power signal wire, and the second end of the storage module is electrically connected with the first node.
14. The display panel of claim 12, wherein the privacy control module includes a first transistor, the display panel further includes a first switch unit and a second switch unit, a first end of the first switch unit is electrically connected to a first voltage terminal, a second end of the first switch unit is electrically connected to a second scan signal line, a first end of the second switch unit is electrically connected to a second voltage terminal, and a second end of the second switch unit is connected to the second scan signal line;
In the first working mode, the first switch unit is turned on, the second switch unit is turned off, a first voltage provided by the first voltage end is transmitted to the second scanning signal line, the first voltage controls the first transistor to be turned on, and the second light-emitting element emits light;
in the second working mode, the first switch unit is turned off, the second switch unit is turned on, a second voltage provided by the second voltage end is transmitted to the second scanning signal line, the second voltage controls the first transistor to be turned off, and the second light-emitting element does not emit light.
15. The display panel of claim 14, wherein the first transistor is a P-type transistor, the first voltage is less than the second voltage, or the first transistor is an N-type transistor, the first voltage is greater than the second voltage.
16. A display device comprising the display panel according to any one of claims 1 to 15.
CN202311569820.8A 2023-11-21 2023-11-21 Display panel and display device Pending CN117596942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311569820.8A CN117596942A (en) 2023-11-21 2023-11-21 Display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311569820.8A CN117596942A (en) 2023-11-21 2023-11-21 Display panel and display device

Publications (1)

Publication Number Publication Date
CN117596942A true CN117596942A (en) 2024-02-23

Family

ID=89917754

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311569820.8A Pending CN117596942A (en) 2023-11-21 2023-11-21 Display panel and display device

Country Status (1)

Country Link
CN (1) CN117596942A (en)

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