Display panel and display device

Abstract

A display panel (100, 200, 300) and a display device (500) are provided. The display panel includes a light-emitting assembly (10) and a light-transmitting control layer (30). The light-transmitting control layer (30) includes a first common electrode (31), a liquid crystal layer (33), and a second common electrode (35), which are stacked in this order on the light-emitting side of the light-emitting assembly (10). The first common electrode (31) and the second common electrode (35) selectively form a preset electric field depending on the light-emitting state of the light-emitting assembly (10). The preset electric field drives a plurality of liquid crystal molecules (33a) in the liquid crystal layer (33) to deflect, thereby controlling the transmittance of the light-transmitting control layer (30). Therefore, when the light-emitting assembly (10) is emitting light, the light-transmitting control layer (30) transmits light, resulting in high transmittance of the display panel. When the light emitting assembly 10 is not emitting light, the light transmission control layer (30) does not transmit light, thereby preventing glare of the light emitting assembly (10) caused by external light.

Description

[Technical Field]

[0001] REFERENCE TO RELATED APPLICATIONS This application claims priority from Chinese Patent Application No. 202310187311.2, filed on March 2, 2023, for the invention entitled "Display Panel and Display Device," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device including the display panel. [Background technology]

[0003] Quantum dot-organic light-emitting diode (QD-OLED) display devices are widely used in the display field due to their advantages such as a wide color gamut, high color purity, long life, and the ability to be manufactured using a printing process.

[0004] In the prior art, when external light illuminates a QD-OLED display, the quantum dots in the QD-OLED display are usually excited, causing obvious glare on the QD-OLED display. Currently, adding a corresponding color resist to the quantum dots can block external light and avoid glare. However, glare still occurs when viewing the QD-OLED display from an angle. In addition, the color resist reduces the transmittance of the QD-OLED display, increasing power consumption.

[0005] Therefore, how to solve the glare problem in QD-OLED displays without affecting the transmittance of the QD-OLED displays is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the objective of the present application is to provide a display panel that does not affect the transmittance of a QD-OLED display device and can solve the glare problem of the QD-OLED display device, and a display device including the display panel.

[0007] To solve the above technical problems, in a first aspect, an embodiment of the present application provides a display panel including a light-emitting assembly and a light transmission control layer provided on a light-emitting side of the light-emitting assembly. The light transmission control layer includes a first common electrode, a liquid crystal layer, and a second common electrode stacked in this order on the light-emitting side of the light-emitting assembly, the liquid crystal layer including a plurality of liquid crystal molecules, the first common electrode and the second common electrode being used to selectively form a preset electric field according to the light-emitting state of the light-emitting assembly, and the preset electric field is used to drive the plurality of liquid crystal molecules to deflect and control the transmittance of the light transmission control layer.

[0008] Based on the same technical concept, in a second aspect, the present embodiment further provides a display device including a housing and the above-mentioned display panel, wherein the display panel is located within the housing, and a light-emitting side of the display panel is exposed to the housing.

[0009] In summary, in the display panel and display device including this display panel provided by the embodiments of the present application, the display panel includes a light-emitting assembly and a light-transmitting control layer. The light-transmitting control layer includes a first common electrode, a liquid crystal layer, and a second common electrode stacked in this order on the light-emitting side of the light-emitting assembly. The liquid crystal layer includes a plurality of liquid crystal molecules. The first common electrode and the second common electrode are used to selectively form a preset electric field depending on the light-emitting state of the light-emitting assembly. The preset electric field is used to drive the plurality of liquid crystal molecules to deflect and control the transmittance of the light-transmitting control layer. Therefore, when the light-emitting assembly is emitting light, the light-transmitting control layer transmits light, thereby achieving high transmittance of the display panel. When the light-emitting assembly is not emitting light, the light-transmitting control layer does not transmit light, thereby preventing glare from the light-emitting assembly due to external light. Because external light cannot penetrate the light-emitting assembly through the light-transmitting control layer, glare does not occur even when the display panel is viewed obliquely. [Brief explanation of the drawings]

[0010] In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings used in the embodiments are briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings from these drawings without creative efforts. [Figure 1] 1 is a schematic diagram illustrating the configuration of a display panel according to a first embodiment of the present invention when the display panel is in a non-transmitting state. [Figure 2] 1 is a schematic diagram illustrating a configuration of a display panel according to a first embodiment of the present invention when the display panel is in a light-transmitting state. [Figure 3] FIG. 4 is a schematic diagram showing a layer structure of a display panel according to a second embodiment of the present invention. [Figure 4] FIG. 10 is a schematic diagram showing a layer structure of a display panel according to a third embodiment of the present invention. [Figure 5] 5 is a schematic plan view of a conductive pattern layer of the display panel shown in FIG. [Figure 6] FIG. 10 is a schematic diagram showing a layer structure of a display device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] To facilitate an understanding of the present application, the present application will now be described more fully with reference to the associated drawings. Preferred embodiments of the present application are illustrated in the drawings. However, the present application may be embodied in many different forms and is not limited to the embodiments set forth herein. The purpose of providing these embodiments is to provide a more thorough and complete understanding of the present application.

[0012] The following description of each embodiment is used to illustrate specific embodiments that can be implemented with reference to the accompanying drawings. In this application, the numbers assigned to components, such as "first" and "second," are used merely to distinguish the objects being described and have no ordering or technical significance. The terms "connection" and "coupling" used in this application include direct and indirect connection (coupling) unless otherwise specified. Directional terms used in this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "side," are directions indicated based on the accompanying drawings. Therefore, the directional terms used are used to better and more clearly explain and understand this application, and do not indicate or imply that the described devices or components must have a specific orientation, be configured, or operate in a specific orientation. Therefore, they cannot be understood as limiting this application.

[0013] In the description of this application, the terms "attached," "connected," and "coupled" should be understood in a broad sense unless otherwise clearly specified or limited. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be mechanically connected. They may be directly connected, indirectly connected via an intermediate medium, or internally connected between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this application depending on the specific circumstances. Note that the terms "first," "second," etc. in the specification, claims, and drawings of this application are used only to distinguish different objects and not to describe a specific order. Furthermore, the terms "comprise," "may comprise," "include," or "may include" used in this application refer to the presence of a corresponding function, operation, element, etc. that is disclosed, and do not limit the presence of one or more additional functions, operations, elements, etc. Furthermore, the terms "comprise" or "include" are intended to mean the presence of the corresponding feature, number, step, operation, element, component, or combination thereof disclosed in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and do not preclude the inclusion of other elements, and are intended to cover such. It should also be understood that "at least one" as used in the specification means one or more, such as one, two, or three, and "plurality" means at least two, such as two or three, unless expressly and specifically limited otherwise.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in the specification of this application are used only to describe specific embodiments and are not intended to limit the present application.

[0015] Referring to FIG. 1, FIG. 1 is a schematic diagram illustrating a display panel according to a first embodiment of the present invention in a non-transmitting state. As shown in FIG. 1, a display panel 100 according to the present embodiment may include a light-emitting assembly 10 for emitting light and displaying colors. The display panel 100 further includes a light-transmitting control layer 30. The light-transmitting control layer 30 includes a first common electrode 31, a liquid crystal layer 33, and a second common electrode 35, which are stacked in this order on the light-emitting side of the light-emitting assembly 10. That is, the first common electrode 31 is disposed on the light-emitting side of the light-emitting assembly 10, the liquid crystal layer 33 is disposed on one side of the first common electrode 31 facing away from the light-emitting assembly 10, and the second common electrode 35 is disposed on one side of the liquid crystal layer 33 facing away from the first common electrode 31. That is, the liquid crystal layer 33 is disposed between the first common electrode 31 and the second common electrode 35. The liquid crystal layer 33 includes a plurality of liquid crystal molecules 33a. The first common electrode 31 and the second common electrode 35 are used to selectively form a preset electric field according to the light-emitting state of the light-emitting assembly 10. The preset electric field is used to drive the liquid crystal molecules 33a to deflect, thereby controlling the transmittance of the light transmission control layer 30.

[0016] Referring to FIG. 2, FIG. 2 is a schematic diagram of the display panel according to the first embodiment of the present invention in a light-transmitting state. When the light-emitting assembly 10 emits light, the preset electric field controls the deflection of the liquid crystal molecules 33a, thereby increasing the transmittance of the light transmission control layer 30. The light transmission control layer 30 does not affect the transmittance of the display panel 100 when the light-emitting assembly 10 emits light. Referring to FIG. 1, when the light-emitting assembly 10 does not emit light, the preset electric field disappears and the liquid crystal molecules 33a are reset, thereby decreasing the transmittance of the light transmission control layer 30. This prevents external light from penetrating the light transmission control layer 30 and entering the light-emitting assembly 10, thereby preventing glare from the light-emitting assembly 10. That is, when the light-emitting assembly 10 emits light, the light transmission control layer 30 transmits light. When the light-emitting assembly 10 is not emitting light, the light transmission control layer 30 does not transmit light. In this case, external light cannot pass through the light transmission control layer 30 and enter the light-emitting assembly 10, so glare from the light-emitting assembly 10 can be avoided, and no glare will occur on the display panel 100 even when viewed obliquely.

[0017] As can be further understood, the shape of the liquid crystal molecules 33a may be elliptical. When a preset electric field is not applied, the long axis of the liquid crystal molecules 33a may be perpendicular to the incident direction of external light, thereby blocking the external light. When a preset electric field is applied, the long axis of the liquid crystal molecules 33a may be parallel or approximately parallel to the light emission direction of the light-emitting assembly 10, allowing light emitted from the light-emitting assembly 10 to pass through the light-transmission control layer 30. Alternatively, when a preset electric field is not applied, the liquid crystal molecules 33a are randomly distributed, and the external light is scattered by the randomly distributed liquid crystal molecules 33a, preventing the external light from passing through the liquid crystal molecules 33a. When a preset electric field is applied, the liquid crystal molecules 33a are driven to be regularly aligned by the preset electric field, allowing light emitted from the light-emitting assembly 10 to pass through the light-transmitting layer. The emission direction of the light emitted from the light-emitting assembly 10 may be opposite to the incident direction of the external light.

[0018] In the embodiment of the present application, the potential of the first common electrode 31 and the potential of the second common electrode 35 are different to form a preset electric field.

[0019] In an exemplary embodiment, the display panel 100 may be a Quantum Dot-Organic Light Emitting Diode (QD-OLED) display panel.

[0020] In an exemplary embodiment, the material of the first common electrode 31 and the material of the second common electrode 35 may both be indium tin oxide (ITO). The material of the first common electrode 31 and the material of the second common electrode 35 may be other materials with good conductivity and good transparency, and are not particularly limited in the present application. As can be understood, since indium tin oxide has good transparency, it is possible to prevent the first common electrode 31 and the second common electrode 35 from affecting the transmittance of the display panel 100.

[0021] In summary, the display panel 100 provided by the embodiment of the present application includes a light-emitting assembly 10 and a light transmission control layer 30. The light transmission control layer 30 includes a first common electrode 31, a liquid crystal layer 33, and a second common electrode 35, which are stacked in this order on the light-emitting side of the light-emitting assembly 10. That is, the first common electrode 31 is disposed on the light-emitting side of the light-emitting assembly 10, the liquid crystal layer 33 is disposed on one side of the first common electrode 31 facing away from the light-emitting assembly 10, and the second common electrode 35 is disposed on one side of the liquid crystal layer 33 facing away from the first common electrode 31. The liquid crystal layer 33 includes a plurality of liquid crystal molecules 33a. The first common electrode 31 and the second common electrode 35 are used to form a preset electric field. The preset electric field is used to drive the liquid crystal molecules 33a to deflect and thereby control the transmittance of the light transmission control layer 30. Therefore, when the light emitting assembly 10 is emitting light, the light transmission control layer 30 transmits light, resulting in high transmittance of the display panel 100. When the light emitting assembly 10 is not emitting light, the light transmission control layer 30 does not transmit light, thereby preventing glare on the light emitting assembly 10 due to external light. Because external light cannot pass through the light transmission control layer 30 and enter the light emitting assembly 10, no glare occurs even when the display panel 100 is viewed obliquely.

[0022] 1 and 2 , in the embodiment of the present application, the light emitting assembly 10 includes a driving circuit layer 11, a plurality of anode layers 12, a plurality of light emitting elements 13, and a cathode layer 14. The driving circuit layer 11 may be the bottom layer of the light emitting assembly 10, which is used to provide other layer structures of the light emitting assembly 10. The driving circuit layer 11 is disposed opposite the light transmission control layer 30, the plurality of anode layers 12 are disposed on one side of the driving circuit layer 11 facing the light transmission control layer 30, spaced apart from each other, and electrically connected to the driving circuit layer 11, the plurality of light emitting elements 13 are disposed on one side of the anode layer 12 facing the driving circuit layer 11, and electrically connected to the anode layer 12, the cathode layer 14 is disposed on one side of the light emitting elements 13 facing the anode layer 12, and electrically connected to the plurality of light emitting elements 13, and the driving circuit layer 11 is used to drive the plurality of light emitting elements 13 to emit primary light.

[0023] In the exemplary embodiment, the multiple anode layers 12 are separated from one another by first gaps 12a, and the multiple light-emitting elements 13 are separated from one another by second gaps 13a. The positions of the first gaps 12a correspond to the positions of the second gaps 13a, and the first gaps 12a and the second gaps 13a communicate with each other to form through-holes. The through-holes separate the multiple anode layers 12 and the multiple light-emitting elements 13. The cathode layer 14 is provided on one side of the light-emitting element 13 facing away from the anode layer 12 and covers the second gaps 13a. The size of the first gaps 12a may be larger or smaller than the size of the second gaps 13a, and is not particularly limited herein.

[0024] In an exemplary embodiment, the multiple anode layers 12 are distributed in an array on the drive circuit layer 11, and the multiple light-emitting elements 13 are also distributed in an array. The positions of the multiple anode layers 12 correspond one-to-one to the positions of the multiple light-emitting elements 13, i.e., the orthogonal projection of one anode layer 12 onto the drive circuit layer 11 overlaps or partially overlaps with the orthogonal projection of one light-emitting element 13 onto the drive circuit layer 11. The area of ​​the orthogonal projection of the anode layer 12 onto the drive circuit layer 11 may be larger or smaller than the area of ​​the orthogonal projection of the light-emitting element 13 onto the drive circuit layer 11, and is not particularly limited in the present application.

[0025] In an exemplary embodiment, the driving circuit layer 11 can drive the plurality of light-emitting elements 13 to emit light by a passive matrix (PM) method or an active matrix (AM) method. The passive matrix method refers to applying a pulse current directly to the light-emitting elements 13. The active matrix method refers to providing the driving circuit layer 11 with a thin film transistor having a switching function and a charge storage capacitor for each light-emitting element 13.

[0026] In an exemplary embodiment, the cathode layer 14 is electrically connected to the plurality of light-emitting elements 13, which saves layout space of the light-emitting assembly 10 and facilitates fabrication.

[0027] In an exemplary embodiment, the material of the anode layer 12 may be aluminum (Al) or silver (Ag), and the material of the cathode layer 14 may be aluminum or silver. The light-emitting element 13 may be an organic light-emitting material, and the primary light emitted from the light-emitting element 13 may be blue light. As can be seen, the work function compatibility between aluminum or silver and the organic light-emitting material is high, which is advantageous for improving the electron injection efficiency and thereby improving the luminous efficiency of the organic light-emitting material.

[0028] In the present embodiment, the light emitting assembly 10 further includes a first encapsulation layer 16. The first encapsulation layer 16 is provided on one side of the cathode layer 14 facing away from the light emitting element 13. The first encapsulation layer 16 is used to protect the light emitting element 13 by isolating it from water vapor, oxygen, dust, and other impurities.

[0029] 1 and 2 , in the embodiment of the present application, the light emitting assembly 10 further includes a light-shielding pattern layer 17. The light-shielding pattern layer 17 is disposed on one side of the first encapsulation layer 16 facing away from the cathode layer 14. The light-shielding pattern layer 17 is provided with a plurality of first accommodating spaces 101, a plurality of second accommodating spaces 102, and a plurality of third accommodating spaces 103.

[0030] In the exemplary embodiment, the light-shielding pattern layer 17, except for the first receiving spaces 101, the second receiving spaces 102, and the third receiving spaces 103, corresponds to the region separating the light-emitting elements 13. That is, the light-shielding pattern layer 17, except for the first receiving spaces 101, the second receiving spaces 102, and the third receiving spaces, corresponds to the first gaps 12a and the second gaps 13a. Therefore, the orthogonal projection of the light-shielding pattern layer 17 onto the driving circuit layer 11 does not overlap with the orthogonal projection of the light-emitting elements 13 onto the driving circuit layer 11, and therefore the light-shielding pattern layer 17 does not block the light emitted from the light-emitting elements 13. As can be understood, the portion of the light-shielding pattern layer 17 excluding the plurality of first accommodating spaces 101, the plurality of second accommodating spaces 102, and the plurality of third accommodating spaces 103 refers to the portion of the light-shielding pattern layer 17 that separates the first accommodating spaces 101, the second accommodating spaces 102, and the third accommodating spaces 103.

[0031] In an exemplary embodiment, the position of one first accommodating space 101 corresponds to the position of one light-emitting element 13, the position of one second accommodating space 102 corresponds to the position of one light-emitting element 13, and the position of one third accommodating space 103 corresponds to the position of one light-emitting element 13.

[0032] In an exemplary embodiment, the plurality of first accommodating spaces 101, the plurality of second accommodating spaces 102, and the plurality of third accommodating spaces 103 may be arranged alternately in sequence. That is, the plurality of first accommodating spaces 101, the plurality of second accommodating spaces 102, and the plurality of third accommodating spaces 103 may be arranged in the following order: first accommodating space 101, second accommodating space 102, third accommodating space 103, first accommodating space 101, second accommodating space 102, third accommodating space 103, ..., first accommodating space 101, second accommodating space 102, third accommodating space 103. It should be understood that the plurality of first accommodating spaces 101, the plurality of second accommodating spaces 102, and the plurality of third accommodating spaces 103 may also be arranged in other arrangements, and this application is not particularly limited thereto.

[0033] In the exemplary embodiment, a portion of the first encapsulation layer 16 is exposed to the first accommodating space 101 , the second accommodating space 102 , and the third accommodating space 103 .

[0034] 1 and 2 , in the embodiment of the present application, the light emitting assembly 10 further includes a plurality of first color converters 18 and a plurality of second color converters 19. The first color converters 18 are disposed in the first accommodating space 101 and connected to the first encapsulation layer 16. The second color converters 19 are disposed in the second accommodating space 102 and connected to the first encapsulation layer 16. The first color converters 18 are used to convert the primary light into a first color light, and the second color converters 19 are used to convert the primary light into a second color light, thereby realizing a full-color display. The first color light may be red light, and the second color light may be green light.

[0035] As can be seen, the position corresponding to the first receiving space 101 emits red light, the position corresponding to the second receiving space 102 emits green light, and the position corresponding to the third receiving space 103 emits blue light, thereby realizing a full-color display. The light-blocking pattern layer 17 can be used to prevent color crosstalk at the positions corresponding to adjacent receiving spaces, i.e., to prevent color crosstalk between the first receiving space 101 and the second receiving space 102, and between the second receiving space 102 and the third receiving space 103.

[0036] In an exemplary embodiment, the position of one first color converter 18 corresponds to the position of one light-emitting element 13; that is, the orthogonal projection of one first color converter 18 onto the drive circuit layer 11 overlaps or partially overlaps with the orthogonal projection of one light-emitting element 13 onto the drive circuit layer 11. The area of ​​the orthogonal projection of the first color converter 18 onto the drive circuit layer 11 may be larger or smaller than the area of ​​the orthogonal projection of the light-emitting element 13 onto the drive circuit layer 11, and this is not a limitation of the present application. The position of one second color converter 19 corresponds to the position of one light-emitting element 13; that is, the orthogonal projection of one second color converter 19 onto the drive circuit layer 11 overlaps or partially overlaps with the orthogonal projection of one light-emitting element 13 onto the drive circuit layer 11. The area of ​​the orthogonal projection of the second color converter 19 onto the drive circuit layer 11 may be larger or smaller than the area of ​​the orthogonal projection of the light-emitting element 13 onto the drive circuit layer 11, and this is not a limitation of the present application.

[0037] In an exemplary embodiment, the first color converter 18 and the second color converter 19 can be formed through a vapor deposition process or a printing process.

[0038] In the present embodiment, each first color converter 18 includes a plurality of first quantum dots 18a and a first encapsulation structure 18b. The plurality of first quantum dots 18a can be distributed in a multilayer configuration within the first accommodating space 101, and the first quantum dots 18a are used to convert the primary light into a first color light. The first encapsulation structure 18b is filled within the first accommodating space 101 and is connected to the first encapsulation layer 16 to fix the plurality of first quantum dots 18a. That is, the first encapsulation structure 18b is filled within the first accommodating space 101 and fixes the plurality of first quantum dots 18a within the first accommodating space 101. Each second color converter 19 includes a plurality of second quantum dots 19a and a second encapsulation structure 19b. The second quantum dots 19a can be distributed in multiple layers in the second accommodating space 102, and the second quantum dots 19a are used to convert the primary light into second color light. The second encapsulating structure 19b is filled in the second accommodating space 102 and connected to the first encapsulating layer 16 to fix the second quantum dots 19a, i.e., the second encapsulating structure 19b is filled in the second accommodating space 102 and fixes the second quantum dots 19a in the second accommodating space 102.

[0039] In the embodiment of the present application, the size of the first quantum dots 18a gradually increases, and the size of the second quantum dots 19a also gradually increases, in the light emission direction of the display panel 100 (i.e., the direction in which the light transmission control layer 30 faces away from the light-emitting assembly 10). For example, the multiple first quantum dots 18a in FIGS. 1 and 2 are distributed in two layers, and the size of the first quantum dots 18a in one layer closer to the first encapsulation layer 16 is smaller than the size of the first quantum dots 18a in one layer farther from the first encapsulation layer 16. The multiple second quantum dots 19a in FIGS. 1 and 2 are distributed in two layers, and the size of the second quantum dots 19a in one layer closer to the first encapsulation layer 16 is smaller than the size of the second quantum dots 19a in one layer farther from the first encapsulation layer 16. The plurality of first quantum dots 18a may be distributed in two layers, and the plurality of second quantum dots 19a may be distributed in two layers, and distribution in more than two layers is also within the scope of protection of the present application.

[0040] As can be seen, the larger the size of the quantum dots, the more energy is required to excite the quantum dots and make them emit light. Therefore, by gradually increasing the size of the quantum dots in the light emission direction of the display panel 100, external light will first hit the larger quantum dots, which will be less likely to be excited, thereby further preventing glare on the display panel 100.

[0041] In an exemplary embodiment, the first quantum dots 18a may be red quantum dots and the second quantum dots 19a may be green quantum dots.

[0042] In an exemplary embodiment, the wavelength range of the blue light is 300 nm to 400 nm, and the wavelength ranges of the red and green lights are both 400 nm to 600 nm. When blue light illuminates a red quantum dot, red light is excited, and when blue light illuminates a green quantum dot, green light is excited.

[0043] In the exemplary embodiment, the surface of the first encapsulating structure 18b facing the first encapsulating layer 16 is flush with the surface of the light-shielding pattern layer 17 facing the first encapsulating layer 16. The surface of the second encapsulating structure 19b facing the first encapsulating layer 16 is flush with the surface of the light-shielding pattern layer 17 facing the first encapsulating layer 16.

[0044] 1 and 2, in the embodiment of the present application, the light emitting assembly 10 further includes a second encapsulation layer 21, which covers the light-shielding pattern layer 17, the plurality of first color converters 18, and the plurality of second color converters 19, and extends into the third accommodating space 103 and is connected to the first encapsulation layer 16. The second encapsulation layer 21 is used to isolate water vapor, oxygen, dust, and other impurities to protect the plurality of first color converters 18 and the plurality of second color converters 19.

[0045] In the exemplary embodiment, the first common electrode 31 is provided on one side of the second encapsulation layer 21 opposite to the first encapsulation layer 16 .

[0046] 3 is a schematic diagram showing a layer structure of a display panel according to a second embodiment of the present invention. The display panel 200 disclosed in the second embodiment differs from the display panel 100 disclosed in the first embodiment in that the first common electrode 31 is electrically connected to the cathode layer 14.

[0047] In the embodiment of the present application, a plurality of first through holes 21a are formed on one side of the second encapsulation layer 21 facing the first encapsulation layer 16, and a plurality of second through holes 16a are formed on one side of the first encapsulation layer 16 facing the cathode layer 14. The first through holes 21a communicate with the second through holes 16a. The positions of the first through holes 21a and the second through holes 16a correspond to the positions of the third accommodating space 103. The first through holes 21a penetrate the second encapsulation layer 21, and the second through holes 16a penetrate the first encapsulation layer 16, so that a portion of the cathode layer 14 is exposed to the second through holes 16a.

[0048] In an exemplary embodiment, the positions of the multiple first through holes 21a and the multiple second through holes 16a correspond one-to-one to the positions of the multiple third accommodating spaces 103, and the multiple first through holes 21a are connected one-to-one to the multiple second through holes 16a.

[0049] In the present embodiment, the light emitting assembly 10 further includes a plurality of connectors 23. The connectors 23 are located between the first common electrode 31 and the cathode layer 14. The connectors 23 are provided in the first through-holes 21a and the second through-holes 16a. Opposite ends of the connectors 23 are connected to the cathode layer 14 and the first common electrode 31, respectively, to electrically connect the first common electrode 31 and the cathode layer 14.

[0050] As can be seen, the first common electrode 31 is electrically connected to the cathode layer 14. When the light-emitting assembly 10 emits light, the first common electrode 31 and the second common electrode 35 form a preset electric field, causing the light transmission control layer 30 to transmit light, i.e., the light transmission control layer 30 is in a translucent state. When the light-emitting assembly 10 does not emit light, the preset electric field is absent, causing the light transmission control layer 30 to not transmit light, i.e., the light transmission control layer 30 is in an opaque state. Therefore, by electrically connecting the first common electrode 31 to the cathode layer 14, the switching time of the light transmission control layer 30 between the translucent state and the opaque state coincides with the switching time of the light-emitting assembly 10 between emitting and not emitting light. In addition, there is no need to provide an additional circuit electrically connected to the first common electrode 31, which simplifies the circuitry of the display panel 100 and facilitates processing and manufacturing. In addition, the impedance of the cathode layer 14 can be reduced, thereby avoiding a voltage drop (IR drop) across the cathode layer 14.

[0051] In an exemplary embodiment, the material of the connector 23 may be indium tin oxide (ITO). As can be seen, since indium tin oxide has good transparency, the transmittance of the area where the third accommodating space 103 is located is prevented from being affected by the connector 23.

[0052] 4, which is a schematic diagram illustrating a layer structure of a display panel according to a third embodiment of the present application. The display panel 300 according to the third embodiment differs from the display panel 200 according to the second embodiment in that the light emitting assembly 10 further includes a conductive pattern layer 25.

[0053] In the present embodiment, the light emitting assembly 10 further includes a conductive pattern layer 25. The conductive pattern layer 25 is disposed on one side of the second encapsulation layer 21, facing away from the first encapsulation layer 16. The first common electrode 31 covers the conductive pattern layer 25 disposed on the second encapsulation layer 21 and is electrically connected to the conductive pattern layer 25. At the same time, a portion of the conductive pattern layer 25 corresponding to the third accommodating space 103 is electrically connected to the connector 23, thereby realizing an electrical connection between the conductive pattern layer 25 and the connector 23. Consequently, the first common electrode 31 is electrically connected to the connector 23 via the conductive pattern layer 25. In other words, the connector 23 is located between the first common electrode 31 and the cathode layer 14. The conductive pattern layer 25 is embedded in the first common electrode 31 and electrically connected to the first common electrode 31. One surface of the conductive pattern layer 25 is exposed to the surface of the first common electrode 31 facing the cathode layer 14. Opposite ends of the connector 23 are connected to the conductive pattern layer 25 and the cathode layer 14 , respectively, to electrically connect the cathode layer 14 and the conductive pattern layer 25 .

[0054] As can be seen, the electrical connection between the cathode layer 14, the conductive pattern layer 25 and the first common electrode 31 reduces the impedance of the cathode layer 14, thereby avoiding uneven display of the display panel 100 caused by voltage drop (IR drop) of the cathode layer 14, and improving the product quality of the display panel 100.

[0055] As can be understood, the display panel 100 may be a large-sized display panel, and since the cathode layer 14 is thin, the impedance of the cathode layer 14 is large and a voltage drop is likely to occur. The conductive pattern layer 25 and the first common electrode 31 reduce the impedance of the cathode layer 14, thereby preventing a voltage drop across the cathode layer 14.

[0056] In an exemplary embodiment, the material of the conductive pattern layer 25 may be a metal, and the conductive pattern layer 25 may be formed through a yellow light process. As can be seen, the material of the conductive pattern layer 25 may be a metal, and the conductive pattern layer 25 has good conductivity, which further reduces the impedance of the cathode layer 14.

[0057] 4 and 5 , in an exemplary embodiment, FIG. 5 is a schematic plan view of the conductive pattern layer of the display panel shown in FIG. 4 . The position of the conductive pattern layer 25 can correspond to the position of the light-shielding pattern layer 17, i.e., the orthogonal projection of the conductive pattern layer 25 onto the driving circuit layer 11 overlaps or partially overlaps with the orthogonal projection of the light-shielding pattern layer 17 onto the driving circuit layer 11. The position of the portion of the conductive pattern layer 25 connected to the connector 23 does not have to correspond to the position of the light-shielding pattern layer 17, i.e., the position of the portion of the conductive pattern layer 25 connected to the connector 23 corresponds to the position of the third accommodating space 103. As can be seen, the portion of the conductive pattern layer 25 connected to the connector 23 is small and does not affect the aperture ratio of the position corresponding to the third accommodating space 103.

[0058] As can be seen, the position of the conductive pattern layer 25 corresponds to the position of the light-blocking pattern layer 17, and the conductive pattern layer 25 can prevent color crosstalk at positions corresponding to adjacent receiving spaces, further improving the display effect of the display panel 300. In addition, the conductive pattern layer 25 can also block external light from the side without affecting the transmittance of the display panel 300, thereby realizing an anti-peeping function. This has the advantages of a simple structure and low cost.

[0059] In summary, the display panel provided by the embodiment of the present application includes a light-emitting assembly 10 and a light-transmitting control layer 30. The light-transmitting control layer 30 includes a first common electrode 31, a liquid crystal layer 33, and a second common electrode 35, which are stacked in this order on the light-emitting side of the light-emitting assembly 10. That is, the first common electrode 31 is disposed on the light-emitting side of the light-emitting assembly 10, the liquid crystal layer 33 is disposed on one side of the first common electrode 31 facing away from the light-emitting assembly 10, and the second common electrode 35 is disposed on one side of the liquid crystal layer 33 facing away from the first common electrode 31. The liquid crystal layer 33 includes a plurality of liquid crystal molecules 33a. The first common electrode 31 and the second common electrode 35 are used to form a preset electric field. The preset electric field is used to deflect the plurality of liquid crystal molecules 33a and control the transmittance of the light-transmitting control layer 30. Therefore, when the light-emitting assembly 10 emits light, the light-transmitting control layer 30 transmits light, resulting in high transmittance of the display panel. When the light emitting assembly 10 is not emitting light, the light transmission control layer 30 does not transmit light, thereby preventing external light from causing glare on the light emitting assembly 10. Because external light cannot pass through the light transmission control layer 30 and enter the light emitting assembly 10, no glare occurs even when the display panel 100 is viewed obliquely.

[0060] Based on the same technical concept, an embodiment of the present application further provides a display device. Referring to FIG. 6, FIG. 6 is a schematic diagram showing a layer structure of a display device according to a fourth embodiment of the present application. The display device 500 provided by the embodiment of the present application may include at least a housing and the above-mentioned display panel. The display panel is located in the housing, and the light-emitting side of the display panel is exposed to the housing. The housing is used to protect the display panel. The display panel is introduced in more detail in the embodiments shown in FIGS. 1 to 5, so it will not be described again here.

[0061] In an exemplary embodiment, the display device 500 may be a quantum dot-organic light emitting diode (QD-OLED) display device.

[0062] As can be understood, the display device 500 may be applied to electronic devices such as, but not limited to, tablet computers, notebook computers, desktop computers, etc. According to the embodiment of the present application, the specific type of the display device 500 is not particularly limited, and those skilled in the art can appropriately design it according to the specific use needs of the display device 500, and the description will not be repeated here.

[0063] In an exemplary embodiment, the display device 500 may further include other necessary components and configurations, such as a driving board, a power supply board, a high voltage board, a key control board, etc. Those skilled in the art can add details according to the specific type and actual functions of the display device 500, so the description will be omitted here.

[0064] In summary, the display device 500 provided by the embodiment of the present application includes a housing and a display panel. The display panel includes a light-emitting assembly 10 and a light transmission control layer 30. The light transmission control layer 30 includes a first common electrode 31, a liquid crystal layer 33, and a second common electrode 35, which are stacked in this order on the light-emitting side of the light-emitting assembly 10. That is, the first common electrode 31 is disposed on the light-emitting side of the light-emitting assembly 10, the liquid crystal layer 33 is disposed on one side of the first common electrode 31 facing away from the light-emitting assembly 10, and the second common electrode 35 is disposed on one side of the liquid crystal layer 33 facing away from the first common electrode 31. The liquid crystal layer 33 includes a plurality of liquid crystal molecules 33a. The first common electrode 31 and the second common electrode 35 are used to form a preset electric field. The preset electric field is used to drive the liquid crystal molecules 33a to deflect and control the transmittance of the light transmission control layer 30. Therefore, when the light emitting assembly 10 is emitting light, the light transmission control layer 30 transmits light, thereby achieving high transmittance of the display panel. When the light emitting assembly 10 is not emitting light, the light transmission control layer 30 does not transmit light, thereby preventing glare on the light emitting assembly 10 due to external light. Because external light cannot pass through the light transmission control layer 30 and enter the light emitting assembly 10, no glare occurs even when the display panel is viewed obliquely.

[0065] The reference terms "one embodiment," "some embodiments," "exemplary embodiments," "examples," "specific examples," or "some examples" used herein mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. References to the above-mentioned terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined as appropriate in any one or more embodiments or examples.

[0066] The application of the present application is not limited to the above examples. Those skilled in the art can make improvements and modifications based on the above description, and all such improvements and modifications fall within the scope of protection of the claims of the present application. Those skilled in the art can understand and implement all or part of the processes of the above embodiments. In addition, equivalent changes obtained in light of the scope of the claims of the present application fall within the scope of coverage of the present application.

Claims

1. A display panel, a light emitting assembly used to emit light; The light-emitting device further includes a light transmission control layer provided on the light-emitting side of the light-emitting assembly, the light transmission control layer including a first common electrode, a liquid crystal layer, and a second common electrode stacked in this order on the light-emitting side of the light-emitting assembly, the liquid crystal layer including a plurality of liquid crystal molecules, the first common electrode and the second common electrode being used to selectively form a preset electric field according to the light-emitting state of the light-emitting assembly, and the preset electric field being used to drive the plurality of liquid crystal molecules to deflect, thereby controlling the transmittance of the light transmission control layer. A display panel characterized by:

2. the light emitting assembly includes a driving circuit layer, a plurality of anode layers, a plurality of light emitting elements, and a cathode layer; the drive circuit layer is provided opposite to the light transmission control layer, the plurality of anode layers are spaced apart on one side of the driving circuit layer facing the light transmission control layer, and are electrically connected to the driving circuit layer; The light emitting elements are spaced apart from one another, positioned on one side of the anode layer facing away from the driving circuit layer, and electrically connected to the anode layer; the cathode layer is provided on one side of the light emitting element opposite to the anode layer and is electrically connected to the plurality of light emitting elements; the driving circuit layer is used to drive the plurality of light-emitting elements to emit basic light; 2. The display panel according to claim 1, wherein the first and second electrodes are arranged parallel to each other.

3. the light-emitting assembly further comprises a plurality of connectors, the connectors being connected between the first common electrode and the cathode layer, and opposite ends of the connectors being electrically connected to the cathode layer and the first common electrode, respectively; 3. The display panel according to claim 2.

4. the light-emitting assembly further comprises a plurality of connectors and a conductive pattern layer, the connectors being located between the first common electrode and the cathode layer, the conductive pattern layer being embedded in the first common electrode and electrically connected to the first common electrode, one surface of the conductive pattern layer being exposed to a surface of the first common electrode facing the cathode layer, and opposite ends of the connectors being connected to the conductive pattern layer and the cathode layer, respectively, to electrically connect the cathode layer and the conductive pattern layer; 3. The display panel according to claim 2.

5. The light emitting assembly further includes a first encapsulation layer, the first encapsulation layer being disposed on one side of the cathode layer facing away from the light emitting element.

4. The display panel according to claim 3.

6. The light emitting assembly further includes a first encapsulation layer, the first encapsulation layer being disposed on one side of the cathode layer facing away from the light emitting element.

5. The display panel according to claim 4.

7. the light-emitting assembly further includes a light-shielding pattern layer, the light-shielding pattern layer is disposed on one side of the first encapsulation layer opposite to the cathode layer, the light-shielding pattern layer is formed with a plurality of first accommodating spaces, a plurality of second accommodating spaces, and a plurality of third accommodating spaces, the positions of the first accommodating spaces, the positions of the second accommodating spaces, and the positions of the third accommodating spaces respectively corresponding to the positions of the light-emitting elements; The light emitting assembly further includes a plurality of first color converters and a plurality of second color converters, the first color converters being disposed in the first accommodating space, and the second color converters being disposed in the second accommodating space.

6. The display panel according to claim 5.

8. Each of the first color converters includes a plurality of first quantum dots and a first encapsulation structure, the plurality of first quantum dots are distributed in multiple layers, the first encapsulation structure fixes the plurality of first quantum dots in the first accommodating space, and the first quantum dots are used to convert the fundamental light into a first color light; Each of the second color converters includes a plurality of second quantum dots and a second encapsulation structure, the plurality of second quantum dots are distributed in multiple layers, the second encapsulation structure fixes the plurality of second quantum dots in the second accommodating space, and the second quantum dots are used to convert the fundamental light into second color light.

8. The display panel according to claim 7,

9. the light-emitting assembly further comprises a second encapsulation layer, the second encapsulation layer covering the light-blocking pattern layer, the first color converters, and the second color converters, and extending into the third accommodating space; 8. The display panel according to claim 7,

10. a plurality of first through holes are formed on one side of the second encapsulation layer facing the first encapsulation layer, a plurality of second through holes are formed on one side of the first encapsulation layer facing the cathode layer, the first through holes penetrate the second encapsulation layer, the second through holes penetrate the first encapsulation layer, the first through holes communicate with the second through holes, a portion of the cathode layer is exposed to the second through holes, and the connector is located in the first through holes and the second through holes to electrically connect the cathode layer and the first common electrode; 10. The display panel according to claim 9.

11. A display device, a housing and a display panel; the display panel is located within the housing, a light-emitting side of the display panel is exposed to the housing, and the display panel includes a light-emitting assembly used to emit light; the display panel further includes a light transmission control layer provided on the light-emitting side of the light-emitting assembly, the light transmission control layer including a first common electrode, a liquid crystal layer, and a second common electrode stacked in this order on the light-emitting side of the light-emitting assembly, the liquid crystal layer including a plurality of liquid crystal molecules, the first common electrode and the second common electrode being used to selectively form a preset electric field according to the light-emitting state of the light-emitting assembly, and the preset electric field being used to drive the plurality of liquid crystal molecules to deflect, thereby controlling the transmittance of the light transmission control layer. A display device characterized by:

12. the light emitting assembly includes a driving circuit layer, a plurality of anode layers, a plurality of light emitting elements, and a cathode layer; the drive circuit layer is provided opposite to the light transmission control layer, the plurality of anode layers are spaced apart on one side of the driving circuit layer facing the light transmission control layer, and are electrically connected to the driving circuit layer; The light emitting elements are spaced apart from one another, positioned on one side of the anode layer facing away from the driving circuit layer, and electrically connected to the anode layer; the cathode layer is provided on one side of the light emitting element opposite to the anode layer and is electrically connected to the plurality of light emitting elements; the driving circuit layer is used to drive the plurality of light-emitting elements to emit basic light; 12. The display device according to claim 11.

13. the light-emitting assembly further comprises a plurality of connectors, the connectors being connected between the first common electrode and the cathode layer, and opposite ends of the connectors being electrically connected to the cathode layer and the first common electrode, respectively; 13. The display device according to claim 12.

14. the light-emitting assembly further comprises a plurality of connectors and a conductive pattern layer, the connectors being located between the first common electrode and the cathode layer, the conductive pattern layer being embedded in the first common electrode and electrically connected to the first common electrode, one surface of the conductive pattern layer being exposed to a surface of the first common electrode facing the cathode layer, and opposite ends of the connectors being connected to the conductive pattern layer and the cathode layer, respectively, to electrically connect the cathode layer and the conductive pattern layer; 13. The display device according to claim 12.

15. The light emitting assembly further includes a first encapsulation layer, the first encapsulation layer being disposed on one side of the cathode layer facing away from the light emitting element.

14. The display device according to claim 13.

16. The light emitting assembly further includes a first encapsulation layer, the first encapsulation layer being disposed on one side of the cathode layer facing away from the light emitting element.

15. The display device according to claim 14.

17. the light-emitting assembly further includes a light-shielding pattern layer, the light-shielding pattern layer is disposed on one side of the first encapsulation layer opposite to the cathode layer, the light-shielding pattern layer is formed with a plurality of first accommodating spaces, a plurality of second accommodating spaces, and a plurality of third accommodating spaces, the positions of the first accommodating spaces, the positions of the second accommodating spaces, and the positions of the third accommodating spaces respectively corresponding to the positions of the light-emitting elements; The light emitting assembly further includes a plurality of first color converters and a plurality of second color converters, the first color converters being disposed in the first accommodating space, and the second color converters being disposed in the second accommodating space.

16. The display device according to claim 15.

18. Each of the first color converters includes a plurality of first quantum dots and a first encapsulation structure, the plurality of first quantum dots are distributed in multiple layers, the first encapsulation structure fixes the plurality of first quantum dots in the first accommodating space, and the first quantum dots are used to convert the fundamental light into a first color light; Each of the second color converters includes a plurality of second quantum dots and a second encapsulation structure, the plurality of second quantum dots are distributed in multiple layers, the second encapsulation structure fixes the plurality of second quantum dots in the second accommodating space, and the second quantum dots are used to convert the fundamental light into second color light.

18. The display device according to claim 17.

19. the light-emitting assembly further comprises a second encapsulation layer, the second encapsulation layer covering the light-blocking pattern layer, the first color converters, and the second color converters, and extending into the third accommodating space; 18. The display device according to claim 17.

20. a plurality of first through holes are formed on one side of the second encapsulation layer facing the first encapsulation layer, a plurality of second through holes are formed on one side of the first encapsulation layer facing the cathode layer, the first through holes penetrate the second encapsulation layer, the second through holes penetrate the first encapsulation layer, the first through holes communicate with the second through holes, a portion of the cathode layer is exposed to the second through holes, and the connector is located in the first through holes and the second through holes to electrically connect the cathode layer and the first common electrode; 20. The display device according to claim 19.

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