Display panel

Abstract

The invention discloses a display panel, the display panel comprises a light-emitting layer and a cathode layer arranged on the light-emitting layer, the light-emitting layer comprises a plurality of first light-emitting parts located in a first display area, the plurality of first light-emitting parts are arranged at intervals along a first direction to form a first pixel row, the plurality of first light-emitting parts are arranged at intervals along a second direction to form a first pixel column, and the cathode layer is arranged on the first display area. The first direction is different from the second direction and is perpendicular to the thickness direction of the display panel, and the cathode layer is arranged on the light-emitting layer. According to the invention, the hollow part, located in the light-transmitting sub-region, of the cathode layer is arranged between the two adjacent first light-emitting parts in the at least one first pixel row and the at least one first pixel column, so that the metal shading area of the first display region can be reduced, the light-transmitting area of the first display region can be increased, and the transmittance of the first display region can be increased.

Description

Display panel Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel. Background Technology

[0002] Organic light-emitting diode (OLED) display panels are widely used due to their advantages such as self-illumination and flexibility. To increase the screen-to-body ratio of display panels, under-display camera and sensor technologies are employed. These technologies place electronic components such as cameras and sensors under the display panel, and improve the light transmittance of the area where the electronic components are located to ensure their normal operation.

[0003] Currently, existing display panels improve the light transmittance of areas where electronic components are located by removing pixels and replacing metal traces with transparent conductive materials. However, because the cathode is a semi-transparent metal and is installed across the entire surface, it absorbs near-infrared light more effectively, resulting in lower transmittance of near-infrared light within the display panel. This leads to poor facial recognition performance. Furthermore, the cathode strongly blocks visible light, resulting in poor image quality for under-display cameras.

[0004] Therefore, it is necessary to provide a display panel to improve this deficiency. Summary of the Invention

[0005] This application provides a display panel that can improve the transmittance of the display panel.

[0006] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, having a first display area, the first display area including a light-transmitting sub-area and a non-light-transmitting sub-area disposed around the light-transmitting sub-area, the display panel including: a light-emitting layer including a plurality of first light-emitting portions located in the first display area, the plurality of first light-emitting portions being arranged at intervals along a first direction to form a first pixel row, the plurality of first light-emitting portions being arranged at intervals along a second direction to form a first pixel column, the first direction being different from the second direction and perpendicular to the thickness direction of the display panel; a cathode layer disposed on the light-emitting layer; wherein, the cathode layer has a cutout portion located in the light-transmitting sub-area, the cutout portion being located between two adjacent first light-emitting portions in at least one first pixel row and at least one first pixel column.

[0007] Optionally, the light-emitting layer includes a plurality of first pixel rows and a plurality of first pixel columns, the plurality of first pixel rows including first sub-rows and second sub-rows arranged alternately along the second direction, and the plurality of first pixel columns including first sub-columns and second sub-columns arranged alternately along the first direction; wherein, the cutout portion is located between two adjacent first light-emitting portions in the first sub-row and the first sub-column.

[0008] Optionally, the center lines connecting two adjacent first light-emitting parts in the first sub-row and two adjacent first light-emitting parts in the first sub-column form a first virtual quadrilateral, and the hollowed-out part is located within the first virtual quadrilateral.

[0009] Optionally, the center lines connecting two adjacent first light-emitting parts in the first sub-row and two adjacent first light-emitting parts in the first sub-column form a second virtual quadrilateral, and the hollowed-out part is located outside the second virtual quadrilateral; wherein, the light-emitting layer includes a plurality of second light-emitting parts and a plurality of third light-emitting parts located in the first display area, and at least one second light-emitting part and at least one third light-emitting part are respectively located on different sides of the second virtual quadrilateral.

[0010] Optionally, the light-emitting layer includes a plurality of second light-emitting parts and a plurality of third light-emitting parts located in the first display area. The first light-emitting part emits a different color than the second and third light-emitting parts. The second and third light-emitting parts are alternately arranged in a second pixel row along the first direction, and the second and third light-emitting parts are alternately arranged in a second pixel column along the second direction. In the first sub-row, two second pixel columns and a first sub-column are provided between two adjacent first light-emitting parts. In the first sub-column, two second pixel rows and a first sub-row are provided between two adjacent first light-emitting parts.

[0011] Optionally, a second pixel column is provided between two adjacent first light-emitting parts in the second sub-row, and a second pixel row is provided between two adjacent first light-emitting parts in the second sub-column; wherein, the center distance between two adjacent first light-emitting parts in the first sub-row is less than the center distance between two adjacent first light-emitting parts in the second sub-row, and the center distance between two adjacent first light-emitting parts in the first sub-column is less than the center distance between two adjacent first light-emitting parts in the first sub-column.

[0012] Optionally, in the second sub-row, there are two second pixel columns between two adjacent first light-emitting parts, and a second sub-column located between the two second pixel columns; in the second sub-column, there are two second pixel rows between two adjacent first light-emitting parts, and a second sub-row located between the two second pixel rows.

[0013] Optionally, the display panel includes a second display area, and the light-emitting layer includes a plurality of fourth light-emitting parts located in the second display area. The first light-emitting part and the fourth light-emitting part emit the same color, and the area of ​​the first light-emitting part is smaller than the area of ​​the fourth light-emitting part. The ratio of the area of ​​the first light-emitting part to the area of ​​the fourth light-emitting part is greater than or equal to 0.7 and less than 1.

[0014] Optionally, the light-emitting layer includes a plurality of second light-emitting portions and a plurality of third light-emitting portions located in the first display area. The second light-emitting portions and the third light-emitting portions are alternately arranged in a second pixel row along the first direction, and the second light-emitting portions and the third light-emitting portions are alternately arranged in a second pixel column along the second direction. The plurality of second light-emitting portions are spaced apart in a third pixel row along the first direction, and the plurality of second light-emitting portions are spaced apart in a third pixel column along the second direction. Among them, a first sub-row, a second sub-row, and a third pixel row located between two adjacent second pixel rows are provided.

[0015] Optionally, the light-emitting layer includes a plurality of second light-emitting portions and a plurality of third light-emitting portions located in the first display area. The second light-emitting portions and the third light-emitting portions are alternately arranged in a second pixel row along the first direction. The plurality of second light-emitting portions are spaced apart in a second pixel column along the first direction. The plurality of third light-emitting portions are spaced apart in a third pixel column along the second direction. The second pixel column and the third pixel column are alternately arranged along the first direction. A first sub-row and a second sub-row are provided between two adjacent second pixel rows. A first sub-column is provided between a second pixel column and an adjacent third pixel column. A second sub-column is provided between a second pixel column and another adjacent third pixel column.

[0016] In the display panel of this application embodiment, by reducing the number of first light-emitting parts in the first pixel row and the first pixel column, the hollow portion of the cathode layer located in the light-transmitting sub-region is disposed between two adjacent first light-emitting parts in at least one first pixel row and at least one first pixel column. This can reduce the metal light-shielding area of ​​the first display area and increase the light-transmitting area of ​​the first display area, thereby increasing the transmittance of the first display area of ​​the display panel.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. The accompanying drawings are provided to more clearly illustrate the technical solutions in the embodiments of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 is a top view of a display panel provided in an embodiment of this application; Figure 2 is a schematic diagram of the light-emitting layer and pixel driving circuit layer of the first display area of ​​a first type of display panel provided in an embodiment of this application; Figure 3 is a schematic diagram of the light-emitting layer and light-shielding layer of the first display area of ​​a first type of display panel provided in an embodiment of this application; Figure 4 is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​a first type of display panel provided in an embodiment of this application; Figure 5 is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​a second type of display panel provided in an embodiment of this application; Figure 6 is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​a third type of display panel provided in an embodiment of this application; Figure 7 is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​a fourth type of display panel provided in an embodiment of this application; Figure 8 is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​a fifth type of display panel provided in an embodiment of this application; Figure 9 is a structural schematic diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] Embodiments of this application provide a display panel having a first display area, the first display area including a light-transmitting sub-area and a non-light-transmitting sub-area disposed around the light-transmitting sub-area, the display panel including a light-emitting layer and a cathode layer disposed on the light-emitting layer, the light-emitting layer including a plurality of first light-emitting portions located in the first display area, the plurality of first light-emitting portions being arranged at intervals along a first direction to form a first pixel row, the plurality of first light-emitting portions being arranged at intervals along a second direction to form a first pixel column, the first direction being different from the second direction and perpendicular to the thickness direction of the display panel, the cathode layer being disposed on the light-emitting layer, the cathode layer having a cutout portion located in the light-transmitting sub-area, the cutout portion being located between two adjacent first light-emitting portions in at least one first pixel row and at least one first pixel column.

[0022] In the embodiments of this application, by reducing the number of first light-emitting portions in the first pixel row and the first pixel column, the hollow portion of the cathode layer located in the light-transmitting sub-region is disposed between two adjacent first light-emitting portions in at least one first pixel row and at least one first pixel column. This can reduce the metal light-shielding area of ​​the first display area and increase the light-transmitting area of ​​the first display area, thereby increasing the transmittance of the first display area.

[0023] As shown in Figure 1, which is a top view of a display panel provided in an embodiment of this application, the display panel includes a display area AA and a non-display area NA disposed around the display area AA. The display area AA is the area used to display images, and may contain multiple sub-pixels and pixel driving circuits for driving the sub-pixels to emit light. The non-display area NA is the area used to place peripheral circuits and wiring, and the peripheral circuits may include, but are not limited to, gate driving circuits.

[0024] In some embodiments, as shown in Figures 1 and 2, Figure 2 is a schematic diagram of the light-emitting layer and pixel driving circuit layer of the first display area of ​​a first display panel provided in an embodiment of this application. The display area AA includes at least one first display area AA1. The first display area AA1 includes a light-transmitting sub-area AA11 and a non-light-transmitting sub-area AA12 disposed around the light-transmitting sub-area AA11. The light-transmitting sub-area AA11 is an area for transmitting external light and light emitted by the sensor. No pixel driving circuit is disposed in the light-transmitting sub-area AA11 to prevent the metal film layer from affecting the transmittance of the light-transmitting sub-area AA11. The pixel driving circuit can be disposed in the non-light-transmitting sub-area AA12.

[0025] In some embodiments, as shown in FIG2, the first display area AA1 may include a plurality of light-transmitting sub-areas AA11 and a plurality of non-light-transmitting sub-areas AA12. The plurality of light-transmitting sub-areas AA11 are arranged in an array, and the plurality of non-light-transmitting sub-areas AA12 are interconnected to surround the light-transmitting sub-areas AA11.

[0026] In some embodiments, the display area AA includes a first display area AA1, the area of ​​which is equal to the area of ​​the display area AA. The area where the first display area AA1 is located can be considered as the entire display area AA. The display area AA can be used not only to display images, but also to transmit ambient light and light emitted by the sensor to achieve the function of whole-area optical sensing.

[0027] In some embodiments, as shown in FIG1, the display area AA includes at least a first display area AA1 and a second display area AA2. The transmittance of the first display area AA1 is greater than that of the second display area AA2, and the area of ​​the first display area AA1 is smaller than that of the second display area AA2. The second display area AA2 is mainly used for displaying the image. The first display area AA1 can not only be used for displaying the image, but also for transmitting external light and light emitted by the sensor, so as to realize the function of under-display camera or under-display sensing.

[0028] In some embodiments, the display area AA may include two or more first display areas AA1, which are arranged side by side with intervals.

[0029] In some embodiments, as shown in FIG2, the display panel includes a light-emitting layer 1, which includes a plurality of light-emitting portions, each of which can be considered as a sub-pixel. The plurality of light-emitting portions include a plurality of first light-emitting portions 11 located in a first display area AA1. The plurality of first light-emitting portions 11 are arranged at intervals along a first direction X to form a first pixel row H1, and the plurality of first light-emitting portions 11 are arranged at intervals along a second direction Y to form a first pixel column C1. In some embodiments, as shown in FIG1 and FIG2, the first direction X is different from the second direction Y and is perpendicular to the thickness direction of the display panel. The first direction X can be horizontal in a top-view perspective, and the second direction Y can be vertical in a top-view perspective. The first direction X is perpendicular to the second direction Y.

[0030] In some embodiments, as shown in FIG2, the light-emitting layer 1 further includes a plurality of second light-emitting portions 12 and a plurality of third light-emitting portions 13 located in the first display area AA1. The second light-emitting portions 12 and the third light-emitting portions 13 are alternately arranged along the first direction X to form a second pixel row H2, and the second light-emitting portions 12 and the third light-emitting portions 13 are alternately arranged along the second direction Y to form a second pixel column C2. The first pixel row H1 is located between two adjacent rows of second pixel rows H2, and the first pixel column C1 is located between two adjacent columns of second pixel columns C2 to form a sub-pixel rendering (SPR) arrangement.

[0031] In some embodiments, the first light-emitting part 11 emits a different color than the second light-emitting part 12 and the third light-emitting part 13. For example, in this embodiment, the first light-emitting part 11 emits green light, the second light-emitting part 12 emits red light, and the third light-emitting part 13 emits blue light. In practical applications, the first light-emitting part 11, the second light-emitting part 12, and the third light-emitting part 13 emit any one of red, green, and blue light, and each emits a different color.

[0032] In some embodiments, as shown in FIG2, the display panel includes a driving circuit layer 3, the driving circuit layer 3 includes a plurality of pixel driving circuit units 30 located in the first display area, the light-emitting layer includes a plurality of pixel units 10, each pixel unit 10 includes at least two first light-emitting parts 11, at least one second light-emitting part 12 and at least one third light-emitting part 13, and each pixel driving circuit unit is used to drive the light-emitting part in the corresponding light-emitting unit to emit light.

[0033] In some embodiments, as shown in FIG2, the pixel unit 10 includes three first light-emitting parts 11, two second light-emitting parts 12, and two third light-emitting parts 13. Each pixel driving circuit unit includes a first pixel driving circuit, a second pixel driving circuit, and a third pixel driving circuit. The three first light-emitting parts 11 are electrically connected to the same first pixel driving circuit, the two second light-emitting parts 12 are electrically connected to the same second pixel driving circuit, and the two third light-emitting parts 13 are electrically connected to the same third pixel driving circuit. By using one pixel driving circuit to drive two or more light-emitting parts to emit light, the number of pixel driving circuits in the first display area can be reduced, thereby increasing the light-transmitting area of ​​the first display area and improving the transmittance of the first display area.

[0034] In some embodiments, as shown in Figures 2 and 3, Figure 3 is a schematic diagram of the light-emitting layer and light-shielding layer of the first display area of ​​a first type of display panel provided in the embodiments of this application. The display panel further includes a light-shielding layer 4, which includes a plurality of light-shielding portions 40. Each light-shielding portion 40 is located in a corresponding non-transparent sub-region AA12. The orthographic projection of the pixel driving circuit unit 30 on the reference plane is located within the orthographic projection of the corresponding light-shielding portion 40 on the reference plane. The reference plane is parallel to the light-emitting surface of the display panel. The light-shielding portions 40 can block the pixel driving circuit unit to prevent the light emitted by the optical sensor from affecting the electrical performance of the transistors in the pixel driving circuit unit.

[0035] In some embodiments, as shown in FIG3, the orthographic projection of the light-emitting portion of the light-emitting layer on the reference plane is located within the orthographic projection of the light-shielding layer 4 on the reference plane.

[0036] In some embodiments, as shown in FIG2, the display panel includes an anode layer 5, which includes a plurality of patterned anodes 51. A light-emitting layer 1 is disposed on the anode layer 5, and a pixel driving circuit is electrically connected to the light-emitting layer through the anodes. It should be noted that in existing sub-pixel rendering arrangements, each pixel unit has four first light-emitting parts, one of which is located in the light-transmitting sub-region AA11. In the sub-pixel rendering arrangement shown in FIG2, each pixel unit has only three first light-emitting parts. By reducing the number of first light-emitting parts located in the light-transmitting sub-region AA11 within the pixel unit, the anode corresponding to that light-emitting part can be omitted, thereby improving the transmittance of the light-transmitting sub-region AA11.

[0037] In some embodiments, as shown in FIG4, FIG4 is a schematic diagram of the light-emitting layer, light-shielding layer and cathode layer of the first display area of ​​the first display panel provided in the embodiments of the present application. The display panel includes a cathode layer 2, which is disposed on the light-emitting layer 1. The cathode layer 2 is disposed on the entire surface of the first display area AA1 and the second display area AA2. The cathode layer 2 is provided with a cutout portion 21 located in the light-transmitting sub-area AA11. The cutout portion 21 penetrates the cathode layer 2 in the thickness direction of the display panel, thereby improving the transmittance of the light-transmitting sub-area AA11.

[0038] In some embodiments, the cathode layer 2 has at least one cutout portion 21. For example, the cathode layer 2 has a cutout portion 21 located within one of the plurality of phototransparent sub-regions AA11.

[0039] In some embodiments, the cathode layer 2 is provided with a plurality of hollow portions 21, each hollow portion 21 being disposed within a corresponding light-transmitting sub-region AA11, and at least a portion of the light-transmitting sub-region AA11 is provided with a hollow portion 21. For example, one or more light-transmitting sub-regions AA11 are not provided with hollow portions 21; or, each light-transmitting sub-region AA11 is provided with a corresponding hollow portion 21.

[0040] In some embodiments, as shown in FIG2, the cutout portion 21 is located between two adjacent first light-emitting portions 11 in at least one first pixel row H1 and at least one first pixel column C1. As mentioned above, one first light-emitting portion located in the light-transmitting sub-region AA11 of the pixel unit is removed, and the cutout portion 21 of the cathode layer 2 is located at the position of the first light-emitting portion, thereby further improving the transmittance of the first display area AA1.

[0041] In some embodiments, a cutout portion 21 is provided between two adjacent first light-emitting portions 11 in at least one first pixel row H1, and no cutout portion 21 is provided between two adjacent first light-emitting portions 11 in at least one first pixel row H1. A cutout portion 21 is provided between two adjacent first light-emitting portions 11 in at least one first pixel column C1, and no cutout portion 21 is provided between two adjacent first light-emitting portions 11 in at least one first pixel column C1.

[0042] In some embodiments, as shown in FIG2, a cutout portion 21 is provided between two adjacent first light-emitting parts 11 in a plurality of first pixel rows H1, and no cutout portion 21 is provided between two adjacent first light-emitting parts in a plurality of first pixel rows H1. Similarly, a cutout portion 21 is provided between two adjacent first light-emitting parts 11 in a plurality of pixel rows C1, and no cutout portion 21 is provided between two adjacent first light-emitting parts 11 in a plurality of first pixel rows C1. By providing cutout portions only between two adjacent first light-emitting parts in a portion of the first pixel rows and first pixel columns, the transmittance of the first display area AA1 can be improved. Furthermore, it ensures that there are sufficient first light-emitting parts within the first display area AA1, avoiding uneven display due to excessive missing first light-emitting parts, thus ensuring the display effect of the first display area.

[0043] In some embodiments, as shown in FIG2, the light-emitting layer 1 includes a plurality of first pixel rows H1 and a plurality of first pixel columns C1. The plurality of first pixel rows H1 include first sub-rows H11 and second sub-rows H12 arranged alternately along the second direction Y. The plurality of first pixel columns C1 include first sub-columns C11 and second sub-columns C12 arranged alternately along the first direction X. The cutout portion 21 is located between two adjacent first light-emitting portions 11 in the first sub-rows H11 and the first sub-columns C11.

[0044] As shown in Figures 2 and 3, the number of first light-emitting parts 11 in the first sub-row H11 is less than the number of first light-emitting parts 11 in the second sub-row H12; the number of first light-emitting parts 11 in the first sub-row H11 can be half the number of first light-emitting parts 11 in the second sub-row H12. Similarly, the number of first light-emitting parts 11 in the first sub-column C11 is less than the number of first light-emitting parts 11 in the second sub-column C12; the number of first light-emitting parts 11 in the first sub-column C11 can be half the number of first light-emitting parts 11 in the second sub-column C12. By reducing the number of first light-emitting parts 11 located in the light-transmitting sub-region AA11 in the first sub-row H11 and the first sub-column C11, and by providing a cutout portion 21 in the cathode layer 2 corresponding to the first light-emitting parts 11, the transmittance of the first display area AA1 can be improved.

[0045] In some embodiments, as shown in Figures 2 and 3, the center distance between two adjacent first light-emitting parts 11 in the first sub-row H11 is a first distance d1, and the center distance between two adjacent first light-emitting parts 11 in the second sub-row H12 is a second distance d2. The first distance d1 is greater than the second distance d2, and the first distance d1 can be twice the second distance d2. The center distance between two adjacent first light-emitting parts 11 in the first sub-column C11 is a third distance d3, and the center distance between two adjacent first light-emitting parts 11 in the second sub-column C12 is a fourth distance d4. The third distance d3 is greater than the fourth distance d4, and the third distance d3 can be twice the fourth distance d4. Therefore, the embodiments shown in Figures 2 to 4 can also be regarded as increasing the center distance between two adjacent first light-emitting parts 11 in the first sub-row H11 and the first sub-column C11 to restrict the first light-emitting parts of the first sub-row H11 and the first sub-column C11 to the non-transparent sub-region AA12, thereby avoiding compression of the light-transmitting area of ​​the light-transmitting sub-region AA11, so as to open the hollow part 21 in the cathode layer 2 of the light-transmitting sub-region AA11 and further increase the transmittance of the first display area AA1.

[0046] In some embodiments, as shown in Figures 2 and 4, the center lines connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 form a first virtual quadrilateral Q1, and the cutout part 21 is located within the first virtual quadrilateral Q1. The location of the cutout part 21 is the intersection of the first sub-row H11 and the first sub-column C11. The first light-emitting parts 11 at the intersection of the first sub-row H11 and the first sub-column C11 are removed, and the cutout part 21 is provided on the portion of the cathode 2 corresponding to the intersection point, thereby improving the transmittance of the first display area AA1.

[0047] In some embodiments, the intersection of the two diagonals of the first virtual quadrilateral Q1 can be located inside the cutout portion 21. The intersection of the two diagonals of the first virtual quadrilateral Q1 can coincide with the center point of the cutout portion 21 or be at a certain distance from the center point of the cutout portion 21.

[0048] In some embodiments, the center line connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 forms a second virtual quadrilateral Q2, the hollow part 21 is located outside the second virtual quadrilateral Q2, and at least one second light-emitting part 12 and at least one third light-emitting part 13 are respectively located on different sides of the second virtual quadrilateral Q2.

[0049] It should be noted that the second light-emitting part 12 is located on the edge of the second virtual quadrilateral Q2, meaning that one edge of the orthographic projection of the second virtual quadrilateral Q2 onto the reference plane passes through the orthographic projection of the second light-emitting part 12 onto the reference plane. The edge of the second virtual quadrilateral Q2 can pass through the center of the second light-emitting part 12, or it can pass through other areas of the second light-emitting part 12. The same applies when the third light-emitting part 13 is located on the border of the second virtual quadrilateral Q2, which will not be elaborated here.

[0050] In some embodiments, as shown in Figures 2 and 4, two adjacent second light-emitting parts 12 are located on two opposite sides of the second virtual quadrilateral Q2. The center of the second light-emitting part 12 may coincide with the midpoint of one side of the second virtual quadrilateral Q2, or it may be at a certain distance from the center of one side of the second virtual quadrilateral Q2. Two adjacent third light-emitting parts 13 are located on the other two opposite sides of the second virtual quadrilateral Q2. The center of the third light-emitting part 13 may coincide with the midpoint of one side of the second virtual quadrilateral Q2, or it may be at a certain distance from the center of one side of the second virtual quadrilateral Q2.

[0051] As shown in Figure 2, the second light-emitting part 12 and the third light-emitting part 13 can borrow color from the three adjacent first light-emitting parts 11. In this way, while reducing the number of first light-emitting parts 11, the display effect similar to that of conventional arrangement can be simulated by utilizing the difference in human eye perception of spatial resolution. This can improve the transmittance of the first display area while ensuring the display effect of the first display area.

[0052] In some embodiments, as shown in FIG2, two second pixel columns C2 are provided between two adjacent first light-emitting parts 11 in the first sub-row H11, and a first sub-row C11 is located between the two second pixel columns C2. Two second pixel rows H2 are provided between two adjacent first light-emitting parts 11 in the first sub-row C11, and a first sub-row H11 is located between the two second pixel rows H2. A second pixel column C2 is provided between two adjacent first light-emitting parts 11 in the second sub-row H12, and a second pixel row H2 is provided between two adjacent first light-emitting parts 11 in the second sub-row C12.

[0053] As shown in Figure 5, which is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​the second type of display panel provided in the embodiment of this application, its structure is roughly the same as that of the first type of display panel shown in Figures 2 to 4, the difference being that: two second pixel columns C2 are provided between two adjacent first light-emitting parts 11 in the second sub-row H12, and a second sub-row C12 is located between the two second pixel columns C2. Two second pixel rows H2 are provided between two adjacent first light-emitting parts 11 in the second sub-row C12, and a second sub-row H12 is located between the two second pixel rows H2.

[0054] It should be noted that if the distribution of the first light-emitting part 11 in the odd and even rows and columns is uneven, it will cause uneven brightness of the pixels in the odd and even rows and columns. Since green brightness accounts for about 70% of white brightness, uneven brightness will exist in all grayscale images.

[0055] In this embodiment, by making the number of pixel columns between two adjacent first light-emitting parts 11 in the first sub-row H11 and the second sub-row H12 equal, and the number of pixel rows between two adjacent first light-emitting parts 11 in the first sub-column C11 and the second sub-column C12 equal, the first light-emitting parts 11 can be evenly distributed in the odd and even rows and columns, thus avoiding uneven brightness of pixels in the odd and even rows and columns.

[0056] In some embodiments, as shown in FIG5, each pixel unit 10 includes two first light-emitting parts 11, two second light-emitting parts 12, and two third light-emitting parts 13. Based on the embodiments shown in FIG2 to FIG4, this embodiment further reduces the number of first light-emitting parts 11 in the pixel unit 10 so that the first light-emitting parts 11 can be evenly distributed in the first sub-row H11, the second sub-row H12, the first sub-column C11, and the second sub-column C12, avoiding the occurrence of display defects due to uneven brightness of pixels in odd and even rows and columns.

[0057] In some embodiments, as shown in FIG5, the number of first light-emitting parts 11 in the first sub-row H11 is equal to the number of first light-emitting parts 11 in the second sub-row H12, and the number of first light-emitting parts 11 in the first sub-column C11 is equal to the number of first light-emitting parts 11 in the second sub-column C12.

[0058] In some embodiments, as shown in FIG5, the center distance between two adjacent first light-emitting parts 11 in the first sub-row H11 is a first distance d1, and the center distance between two adjacent first light-emitting parts 11 in the second sub-row H12 is a second distance d2, wherein the first distance d1 is equal to the second distance d2. The center distance between two adjacent first light-emitting parts 11 in the first sub-column C11 is a third distance d3, and the center distance between two adjacent first light-emitting parts 11 in the second sub-column C12 is a fourth distance d4, wherein the third distance d3 is equal to the fourth distance d4.

[0059] In some embodiments, the light-emitting layer 1 includes a plurality of fourth light-emitting portions (not shown in the figure) located in the second display area AA2. The first light-emitting portion 11 and the fourth light-emitting portion emit the same color. Both the first light-emitting portion 11 and the fourth light-emitting portion emit green light. The area of ​​the first light-emitting portion 11 is smaller than the area of ​​the fourth light-emitting portion, which can improve the transmittance of the first display area AA1.

[0060] Furthermore, the ratio of the area of ​​the first light-emitting part 11 to the area of ​​the fourth light-emitting part is greater than or equal to 0.7 and less than 1. For example, the ratio of the area of ​​the first light-emitting part 11 to the area of ​​the fourth light-emitting part can be 0.7, 0.8, 0.9, or 0.98, etc. By limiting the ratio of the area of ​​the first light-emitting part 11 to the area of ​​the fourth light-emitting part to between 0.7 and 1, the area of ​​the first light-emitting part 11 is increased, the lifespan of the first light-emitting part 11 is improved, and the green distribution is made more uniform and regular, thereby improving the uneven brightness of the first display area.

[0061] As shown in Figure 5, the center lines connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 form a second virtual quadrilateral Q2. The hollow part 21 is located outside the second virtual quadrilateral Q2. Two adjacent second light-emitting parts 12 are located on two opposite sides of the second virtual quadrilateral Q2. Two adjacent third light-emitting parts 13 are located on the other two opposite sides of the second virtual quadrilateral Q2.

[0062] As shown in Figure 6, which is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​the third type of display panel provided in the embodiment of this application, its structure is roughly the same as that of the second type of display panel shown in Figure 5, except that: the second light-emitting part 12 and the third light-emitting part 13 are alternately arranged along the first direction X to form a second pixel row H2, the second light-emitting part 12 and the third light-emitting part 13 are alternately arranged along the second direction Y to form a second pixel column C2, a plurality of second light-emitting parts 12 are spaced apart along the first direction X to form a third pixel row H3, and a plurality of second light-emitting parts 12 are spaced apart along the second direction Y to form a third pixel column C3. A first sub-row H11, a second sub-row H12, and a third pixel row H3 located between the first sub-row H11 and the second sub-row H12 are provided between two adjacent second pixel rows H2.

[0063] As shown in Figure 6, the third pixel row H3 and the third pixel column C3 only contain the second light-emitting part 12, and no third light-emitting part 13 is provided. The pixel unit 10 includes two first light-emitting parts 11, two second light-emitting parts 12, and one third light-emitting part 13. By reducing the number of third light-emitting parts 13 in the pixel unit 10, the transmittance of the first display area AA1 can be further improved.

[0064] As shown in Figure 6, the center lines connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 form a second virtual quadrilateral Q2. The hollow part 21 is located outside the second virtual quadrilateral Q2. Two adjacent second light-emitting parts 12 are located on two opposite sides of the second virtual quadrilateral Q2. A third light-emitting part 13 is located on the other two opposite sides of the second virtual quadrilateral Q2.

[0065] As shown in Figure 7, which is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​the fourth type of display panel provided in the embodiment of this application, its structure is roughly the same as that of the second type of display panel shown in Figure 5, except that: the second light-emitting part 12 and the third light-emitting part 13 are alternately arranged along the first direction X to form a second pixel row H2, the second light-emitting part 12 and the third light-emitting part 13 are alternately arranged along the second direction Y to form a second pixel column C2, a plurality of third light-emitting parts 13 are spaced apart along the first direction X to form a third pixel row H3, and a plurality of third light-emitting parts 13 are spaced apart along the second direction Y to form a third pixel column C3. A first sub-row H11, a second sub-row H12, and a third pixel row H3 located between the first sub-row H11 and the second sub-row H12 are provided between two adjacent second pixel rows H2.

[0066] As shown in Figure 7, the third pixel row H3 and the third pixel column C3 contain only the third light-emitting part 13, without the second light-emitting part 12. The pixel unit 10 includes two first light-emitting parts 11, one second light-emitting part 12, and two third light-emitting parts 13. By reducing the number of second light-emitting parts 12 in the pixel unit 10, the transmittance of the first display area AA1 can be further improved.

[0067] As shown in Figure 7, the center lines connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 form a second virtual quadrilateral Q2. The hollow part 21 is located outside the second virtual quadrilateral Q2. A second light-emitting part 12 is located on two opposite sides of the second virtual quadrilateral Q2. Two adjacent third light-emitting parts 13 are located on the other two opposite sides of the second virtual quadrilateral Q2.

[0068] As shown in Figure 8, which is a schematic diagram of the light-emitting layer, light-shielding layer, and cathode layer of the first display area of ​​the fifth type of display panel provided in the embodiment of this application, its structure is roughly the same as that of the fourth type of display panel shown in Figure 7, the difference being that: a plurality of second light-emitting parts 12 are arranged at intervals along the first direction X to form a second pixel column C2, and a plurality of third light-emitting parts 13 are arranged at intervals along the second direction Y to form a third pixel column C3, and the second pixel column C2 and the third pixel column are arranged alternately along the first direction X. A first sub-row H11 and a second sub-row H12 are provided between two adjacent second pixel rows H2, a first sub-row C11 is provided between the second pixel column C2 and an adjacent third pixel column C3, and a second sub-row C12 is provided between the second pixel column C2 and another adjacent third pixel column C3.

[0069] As shown in Figure 8, the pixel unit 10 includes two first light-emitting parts 11, one second light-emitting part 12, and one third light-emitting part 13. By reducing the number of the second light-emitting parts 12 and the third light-emitting parts 13 in the pixel unit 10, the transmittance of the first display area AA1 can be further improved.

[0070] As shown in Figure 8, the center lines connecting two adjacent first light-emitting parts 11 in the first sub-row H11 and two adjacent first light-emitting parts 11 in the first sub-column C11 form a second virtual quadrilateral Q2. The hollow part 21 is located outside the second virtual quadrilateral Q2. A second light-emitting part 12 is located on two opposite sides of the second virtual quadrilateral Q2, and a third light-emitting part 13 is located on the other two opposite sides of the second virtual quadrilateral Q2.

[0071] Based on the display panel provided in the above embodiments of this application, embodiments of this application also provide a display device. Referring to FIG9, which is a structural schematic diagram of the display device provided in an embodiment of this application, the display device 1000 includes a display panel 100 and a housing 200, with the display panel 100 disposed on the housing 200. The display panel 100 can be any of the display panels provided in the above embodiments of this application, and can achieve the same technical effects as the display panels provided in the above embodiments; further details are omitted here.

[0072] In some embodiments, as shown in FIG9, the display device 1000 further includes an optical element 300, which is disposed below the display panel 100 and aligned with the first display area AA1 of the display panel 100. The optical element 300 can acquire ambient light through the first display area AA1. The optical element 300 may include, but is not limited to, at least one of optical sensors such as a camera and an infrared sensor. When the optical element 300 includes a camera, the display device can realize the function of under-display photography.

[0073] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a display panel, which includes a light-emitting layer and a cathode layer disposed on the light-emitting layer. The light-emitting layer includes a plurality of first light-emitting portions located in a first display area. The plurality of first light-emitting portions are arranged at intervals along a first direction to form a first pixel row, and the plurality of first light-emitting portions are arranged at intervals along a second direction to form a first pixel column. The first direction and the second direction are different and perpendicular to the thickness direction of the display panel. The cathode layer is disposed on the light-emitting layer. By reducing the number of first light-emitting portions in the first pixel row and the first pixel column, the hollow portion of the cathode layer located in the light-transmitting sub-area is disposed between two adjacent first light-emitting portions in at least one first pixel row and at least one first pixel column. This can reduce the metal light-shielding area of ​​the first display area and increase the light-transmitting area of ​​the first display area, thereby increasing the transmittance of the first display area.

[0074] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The display panel has a first display area, which includes a light-transmitting sub-area and a non-light-transmitting sub-area surrounding the light-transmitting sub-area. The display panel includes: a light-emitting layer, which includes a plurality of first light-emitting portions located in the first display area. The plurality of first light-emitting portions are arranged at intervals along a first direction to form a first pixel row, and the plurality of first light-emitting portions are arranged at intervals along a second direction to form a first pixel column. The first direction is different from the second direction and is perpendicular to the thickness direction of the display panel. A cathode layer is disposed on the light-emitting layer. The cathode layer has a cutout located in the light-transmitting sub-area. The cutout is located between two adjacent first light-emitting portions in at least one first pixel row and at least one first pixel column.

2. The display panel as described in claim 1, characterized in that, The light-emitting layer includes a plurality of first pixel rows and a plurality of first pixel columns. The plurality of first pixel rows include first sub-rows and second sub-rows arranged alternately along the second direction. The plurality of first pixel columns include first sub-columns and second sub-columns arranged alternately along the first direction. The cutout portion is located between two adjacent first light-emitting portions in the first sub-row and the first sub-column.

3. The display panel as described in claim 2, characterized in that, The center lines connecting two adjacent first light-emitting parts in the first sub-row and two adjacent first light-emitting parts in the first sub-column form a first virtual quadrilateral, and the hollowed-out part is located inside the first virtual quadrilateral.

4. The display panel as described in claim 3, characterized in that, The center lines connecting two adjacent first light-emitting parts in the first sub-row and two adjacent first light-emitting parts in the first sub-column form a second virtual quadrilateral, and the hollow part is located outside the second virtual quadrilateral; wherein, the light-emitting layer includes a plurality of second light-emitting parts and a plurality of third light-emitting parts located in the first display area, and at least one second light-emitting part and at least one third light-emitting part are respectively located on different sides of the second virtual quadrilateral.

5. The display panel as described in claim 3, characterized in that, The light-emitting layer includes a plurality of second light-emitting parts and a plurality of third light-emitting parts located in the first display area. The first light-emitting part emits a different color than the second and third light-emitting parts. The second and third light-emitting parts are alternately arranged in a second pixel row along the first direction, and the second and third light-emitting parts are alternately arranged in a second pixel column along the second direction. In the first sub-row, there are two second pixel columns between two adjacent first light-emitting parts, and a first sub-column between the two second pixel columns. In the first sub-column, there are two second pixel rows between two adjacent first light-emitting parts, and a first sub-row between the two second pixel rows.

6. The display panel as described in claim 5, characterized in that, A second pixel column is provided between two adjacent first light-emitting parts in the second sub-row, and a second pixel row is provided between two adjacent first light-emitting parts in the second sub-column; wherein, the center distance between two adjacent first light-emitting parts in the first sub-row is smaller than the center distance between two adjacent first light-emitting parts in the second sub-row, and the center distance between two adjacent first light-emitting parts in the first sub-column is smaller than the center distance between two adjacent first light-emitting parts in the first sub-column.

7. The display panel as described in claim 5, characterized in that, In the second sub-row, there are two second pixel columns between two adjacent first light-emitting parts, and a second sub-column located between the two second pixel columns; in the second sub-column, there are two second pixel rows between two adjacent first light-emitting parts, and a second sub-row located between the two second pixel rows.

8. The display panel as described in claim 7, characterized in that, The display panel includes a second display area, and the light-emitting layer includes a plurality of fourth light-emitting parts located in the second display area. The first light-emitting part and the fourth light-emitting part emit the same color, and the area of ​​the first light-emitting part is smaller than the area of ​​the fourth light-emitting part. The ratio of the area of ​​the first light-emitting part to the area of ​​the fourth light-emitting part is greater than or equal to 0.7 and less than 1.

9. The display panel as described in claim 2, characterized in that, The light-emitting layer includes a plurality of second light-emitting parts and a plurality of third light-emitting parts located in the first display area. The second light-emitting parts and the third light-emitting parts are alternately arranged in a second pixel row along the first direction, and the second light-emitting parts and the third light-emitting parts are alternately arranged in a second pixel column along the second direction. The plurality of second light-emitting parts are spaced apart in a third pixel row along the first direction, and the plurality of second light-emitting parts are spaced apart in a third pixel column along the second direction. Among them, a first sub-row, a second sub-row, and a third pixel row located between two adjacent second pixel rows are provided.

10. The display panel as claimed in claim 2, characterized in that, The light-emitting layer includes a plurality of second light-emitting portions and a plurality of third light-emitting portions located in the first display area. The second light-emitting portions and the third light-emitting portions are alternately arranged in a second pixel row along the first direction. The plurality of second light-emitting portions are spaced apart in a second pixel column along the first direction. The plurality of third light-emitting portions are spaced apart in a third pixel column along the second direction. The second pixel column and the third pixel column are alternately arranged along the first direction. A first sub-row and a second sub-row are provided between two adjacent second pixel rows. A first sub-column is provided between a second pixel column and an adjacent third pixel column. A second sub-column is provided between a second pixel column and another adjacent third pixel column.

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