DISPLAY PANEL AND DISPLAY DEVICE
The present disclosure provides a display panel and a display device, which belongs to the field of display technology. The display panel has a display area and a peripheral area, the display area includes a main display area and a transparent display area, and the display panel includes a first sub-pixel, a first pixel driving circuit and a transparent lead. The first sub-pixel is located in the transparent display area, and includes a first pixel electrode; the first pixel driving circuit is located in the peripheral area; and the transparent lead connects the first pixel electrode and the first pixel driving circuit, so that the first pixel driving circuit drives the first sub-pixel to emit light.
The present application is based upon International Application No. PCT/CN2020/119568 filed on Sep. 30, 2020, which is based upon and claims priority to International Application No. PCT/CN2020/117373 filed on Sep. 24, 2020, the entire contents of which are incorporated herein by reference.
TECHNICAL FIELDThe present disclosure relates to the field of display technology, and more specifically, to a display panel and display device.
BACKGROUNDA current display device is usually provided with a camera for photographing. In order to maximize a screen-to-body ratio, technologies such as notch screen, waterdrop screen, and hole digging in screen have appeared successively. These technologies reduce an area occupied by a camera in a peripheral area by digging a hole in a part of a display area and placing a camera below the digging area, thereby increasing the screen-to-body ratio. However, the above technique needs to remove a part of the display area, which will cause a part of the display screen to fail to display.
In order to avoid removing the display area, one way is to arrange a display panel with a transparent display area, and arrange an under-screen camera at the position corresponding to the transparent display area, so that the area can take into account both camera and display functions and improve user experience. However, currently, this type of display panel has a problem of that a brightness of the transparent display area is lower than that of anormal display area, resulting in poor picture quality.
It should be noted that the information of the invention in the background art section above is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those skilled in the art.
SUMMARYA first aspect of the present disclosure provides a display panel. The display panel has a display area and a peripheral area, the display area includes a main display area and a transparent display area, and the display panel includes:
at least one first sub-pixel, located in the transparent display area, and including a first pixel electrode;
at least one first pixel driving circuit, located in the peripheral area;
at least one transparent lead, connecting the first pixel electrode and the first pixel driving circuit, so that the first pixel driving circuit drives the first sub-pixel to emit light.
In an exemplary embodiment of the present disclosure, at least two of the transparent leads are located on different layers, and projections, in a thickness direction of the display panel, of the transparent leads located on the different layers are partially overlapped.
In an exemplary embodiment of the present disclosure, the transparent lead includes a first sub-transparent lead and a second sub-transparent lead connected to each other, the first sub-transparent lead extends in a row direction and is located in the peripheral area, and the second transparent sub-lead extends in a column direction and is located at least in the display area.
In an exemplary embodiment of the present disclosure, the transparent lead includes a material of ITO, silver nanowire or graphene.
In an exemplary embodiment of the present disclosure, the display panel further includes:
at least one first gate driving circuit, located in the peripheral area;
at least one first scan line, located in the peripheral area,
the first scan line connects the first gate driving circuit and the first pixel driving circuit, so that the first gate driving circuit provides the first pixel driving circuit with a scan signal.
In an exemplary embodiment of the present disclosure, each of the first gate driving circuits and each of the first pixel driving circuits are arranged at a same side of the transparent display area.
In an exemplary embodiment of the present disclosure, all the first sub-pixels are divided into a plurality of rows, and respective first sub-pixels corresponding to at least one of the first gate driving circuits are located in a same row.
In an exemplary embodiment of the present disclosure, respective first pixel driving circuits connected to the first sub-pixels located in the same row forms one or more pixel driving circuit islands, and respective pixel driving circuit islands are arranged in a row direction at a side, close to the transparent display area, of the peripheral area.
In an exemplary embodiment of the present disclosure, the respective pixel driving circuits in the pixel driving circuit island are arranged in the row direction, and the first scan line corresponding to the pixel driving circuit island extends in the row direction and is sequentially connected to the respective pixel driving circuits in the pixel driving circuit island.
In an exemplary embodiment of the present disclosure, the display panel further includes:
at least one second sub-pixel, located in the main display area, and including a second sub-pixel electrode; and
at least one second pixel driving circuit, located in the main display area, electrically connected to the second sub-pixel electrode, and configured to drive the second sub-pixel to emit light,
wherein pixel densities of the transparent display area and the main display area are same.
In an exemplary embodiment of the present disclosure, the display panel further includes:
at least one second gate driving circuit, located in the peripheral area;
at least one second scan line, located in the peripheral area and the display area,
wherein the second scan line connects the second gate driving circuit and the second pixel driving circuit, so that the second gate driving circuit provides the second pixel driving circuit with a scan signal.
In an exemplary embodiment of the present disclosure, the display panel further includes:
a plurality of first data lines, connected to the first pixel driving circuit and the second pixel driving circuit corresponding to the first sub-pixel and the second sub-pixel in a same column,
wherein the first data line extends along the column direction and bypasses an edge of the transparent display area.
Another aspect of the present disclosure provides a display device, including the display panel described above and a camera, the camera being arranged on a backlight side of the display panel and corresponding to the transparent display area.
It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.
The drawings herein are incorporated into the specification and constitute a part of the specification, show embodiments in accordance with the present disclosure, and are used, together with the specification, to explain the principle of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
In the related art, when a display panel is provided with an under-screen camera in a transparent display area, in order to improve photographing effect, a light transmittance of the transparent display area shall be as high as possible. However, a pixel driving circuit necessary for display inevitably includes some light-blocking layers, which would block light and thus affect the light transmittance. One way is to reduce pixel density in the transparent display area, thereby reducing light shielding due to an internal structure of the pixel driving circuit, and thus increasing the light transmittance. However, since the pixel density in the transparent display area is lower than that in a normal display area, the brightness of the transparent display area during display will be lower than that of the normal display area, which would cause a visual graininess, resulting in a decrease in image quality.
In view of the above problem, an embodiment of the present disclosure provides a display panel, which improves the light transmittance of the transparent display area without affecting the display effect, and takes into account both photographing and display effects.
As shown in
In the present disclosure, the first sub-pixel 11 is normally arranged in the transparent display area 100A, and the first pixel driving circuit 12 corresponding to the first sub-pixel 11 is arranged in the peripheral area 200, which prevents a light-blocking layer in the first pixel driving circuit 12 from affecting a light transmittance, and thus improves the light transmittance in the transparent display 100A and ensures a good photographing effect. Further, such structure does not affect a normal display of the transparent display area 100A, and can also increase a display brightness of the transparent display area 100A. The pixel density of the transparent display area can be set according to the situation, for example, to be the same as that of the main display area 100B. The display effect is no longer limited by the pixel density, and thus the image quality of the entire display panel is improved.
The display panel according to the embodiment of the present disclosure will be described in detail below.
In the present disclosure, the display panel may be an organic light emitting diode (OLED) display panel, such as an active matrix OLED (AM-OLED) display panel, a quantum dot OLED (QD-OLED) display panel and the like.
In addition to the circle shown in the figure, the shape of the transparent display area 100A may also be a rectangle, a rounded rectangle, or other regular or irregular polygons. In addition to one shown in the figure, the number of the transparent display area 100A can also be multiple to correspond to different numbers of cameras, so as to achieve different photographing effects. The transparent display area 100A may be arranged at the center of the display area, or may be arranged at any corner of the display area. In order to facilitate the description of the technical solution of the present disclosure, the following takes that the display panel has one transparent display area 100A, and the transparent display area 100A is located at the upper center of the display panel as an example for detailed description.
In the exemplary embodiment, a plurality of first sub-pixels 11 are symmetrically arranged in the transparent display area 100A of the display panel, and correspondingly, a plurality of first pixel driving circuits 12 corresponding thereto are symmetrically arranged in the peripheral area 200. For example, there are 16 first sub-pixels 11 in the figure, which are arranged in two rows, and also, there are 16 first pixel driving circuits 12. The main display area 100B of the display panel has a conventional structure, in which a plurality of second sub-pixels 21 and a plurality of second pixel driving circuits 22 arranged under the second sub-pixels 21 are arranged symmetrically. The first pixel driving circuit 12 is electrically connected to the electrode of the first sub-pixel 11 through a transparent lead 13 to drive the first sub-pixel 11 to emit light; and the second pixel driving circuit 22 is directly electrically connected to the electrode of the second sub-pixel 21 to drive the second sub-pixel 21 to emit light.
Taking the first pixel driving circuit as an example, the first pixel driving circuit 12 includes a driving transistor disposed on a substrate 98. As shown in
Taking the first sub-pixel as an example, the first sub-pixel 11 is located above the first pixel driving circuit 12 in a thickness direction of the display panel. The first sub-pixel 11 may be a red sub-pixel, a green sub-pixel or a blue sub-pixel, and in some embodiments, may also be a white sub-pixel or other color sub-pixels. Referring to
The first sub-pixel 11 and the first pixel driving circuit 12 corresponding thereto are located in different areas, therefore they are connected by the transparent lead 13, so that the first pixel driving circuit 12 can drive the first sub-pixel 11 to emit light. Corresponding to the first sub-pixels 11, there are also a plurality of transparent leads 13, such as 16 as shown in
Since the light transmittance of the transparent display area 100A of the present disclosure has been improved, the pixel density of the transparent display area 100A can be made higher, which can be the same as the pixel density of the main display area 100B, thereby eliminating the visual graininess of the transparent display area 100A caused by too low pixel density, and thus can ensure the same display effect of two areas.
When the transparent lead 13 is manufactured, the transparent lead 13 can be provided in the same layer as conductive layers such as the first pixel electrode 80 and the source and drain layer 95, or can be an independently provided layer located between two insulating layers. When the transparent lead 13 adopts the independently provided layer, a wiring density of the existing layer in the display area can be reduced, and a mutual influence between lines can be reduced.
For example, in an embodiment, all the transparent leads shown in
For another example, in another embodiment, the transparent leads 13 corresponding to the first sub-pixels in the two rows shown in
In other embodiments, the transparent leads 13 corresponding to all sub-pixels can be further divided into more layers, such as three layers, four layers, and so on. Each layer of transparent leads 13 is isolated from another layer of transparent leads 13 by an insulating layer, and at the same time, is electrically connected to the corresponding first pixel electrode 80 and the first pixel driving circuit 12 through the via hole opened in the insulating layer. It can be understood that when the transparent leads 13 are divided into a plurality of layers, the wiring density of the leads can be reduced, and the parasitic capacitance can be reduced, but the thickness of the display panel will be increased. Therefore, a specific process can be selected according to actual product requirements.
Preferably, as shown in
In order to reduce the influence of the transparent lead 13 on other layers of the display area, the transparent lead 13 may occupy the area of the main display area 100B as less as possible. Referring to
In the exemplary embodiment, the entire display area adopts the form of bilateral driving. Referring to
In the embodiment, each of the first gate driving circuits 14 and each of the first pixel driving circuits 12 are located at the same side of the transparent display area 100A, that is, the peripheral area 200 above the display area in the figure, so that the length between the transparent lead 13 and the first scan line 15 can be reduced, and the resistance is reduced. In other embodiments, when the transparent display area 100A is located at a corner of the display area, each of the first gate driving circuits 14 and each of the first pixel driving circuits 12 may also be located at the left or right side close to the transparent display area 100A.
In the embodiment, the respective first sub-pixels 11 corresponding to the respective first pixel driving circuits 12 connected to the first gate driving circuit 14 are located in the same row. Referring to
In order to facilitate circuit arrangement, the first pixel driving circuits 12 connected to the first sub-pixels in the same row constitute a pixel driving circuit island 121, and the pixel driving circuit islands 121 are arranged in the row direction at the side of the peripheral area 200 close to the transparent display area 100A. Specifically, referring to FIG. 1, the first pixel driving circuits 12 corresponding to the left four first sub-pixels 11 in the first row constitute one pixel driving circuit island 121, and are connected to one first gate driving circuit 14; and the first pixel driving circuits 12 corresponding to the right four first sub-pixels 11 in the first row constitutes one pixel driving circuit island 121 and are connected to one first gate driving circuit 14; and the second row has the same arrangement. Four pixel driving circuit islands 121 are arranged in the row direction in the peripheral area 200 above the transparent display area 100A, so that all the first pixel driving circuits 12 can be as close as possible to the corresponding first sub-pixels 11 to reduce the length of the transparent lead 13, and their arrangement in the row direction can reduce the width of the peripheral area 200 and realize a narrow frame arrangement. In other embodiments, the first pixel driving circuits 12 connected to the first sub-pixels 11 in each row may also form a plurality of pixel driving circuit islands 121, and the plurality of pixel driving circuit islands 121 are arranged in the row direction to achieve a narrow frame. Further, when the number of pixel driving circuit islands 121 is large, the plurality of pixel driving circuit islands 121 may also be arranged in the column direction.
Further, the first pixel driving circuits 12 in each pixel driving circuit island 121 are also arranged in the row direction, so that the first scan line 15 extends in the row direction to simultaneously connect the first pixel driving circuits 12 in the same pixel driving circuit island 121, thereby reducing the length of the first scan line 15. Further, the arrangement sequence of the four first pixel driving circuits 12 in each pixel driving circuit island 121 is consistent with the arrangement sequence of the corresponding four first sub-pixels 11, which can prevent the transparent leads 13 from crossing each other. The arrangement sequence here refers to a sequence from left to right.
It should be noted that in the above embodiment, the first sub-pixels 11 located in different rows are driven by different first gate driving circuits 14. In another embodiment, one first gate driving circuit 14 may be used to drive the first sub-pixels 11 in a plurality of rows, and even one first gate driving circuit 14 drives the first sub-pixels 11 in all rows, which may further reduce the arrangement space. In actual products, the number of first gate driving circuits 14 can be determined according to the space and the number of pixel rows.
When there are a plurality of first gate driving circuits 14, the arrangement of the first gate driving circuits 14 in the peripheral area may refer to
The arrangement of the plurality of second gate driving circuits 23 in the peripheral region 200 may be the arrangement in the column direction as shown in
In the exemplary embodiment, the display panel further includes a plurality of first data lines 16, and the first data line 16 is used to provide data signals to the pixel column of the transparent display area 100A.
In the above exemplary embodiments, it is only illustrated as an example that the display panel has one transparent display area 100A, the transparent display area 100A is located in the upper center of the display panel, and the driving mode is bilateral driving. Those skilled in the art can understand that in other embodiments, a plurality of the above-mentioned transparent display areas 100A can be provided in the display panel, and the first pixel driving circuits 12 in the transparent display areas 100A are all provided in the peripheral area 200, so as to improve the light transmittance. In addition, when the transparent display area 100A is not located on the symmetry axis, the arrangement positions of the first pixel driving circuit 12 and the transparent lead 13 can be designed according to the actual space. Furthermore, the display panel of the present disclosure can also be driven in a unilateral driving manner.
An embodiment of the present disclosure also provide a display device, which includes the above-mentioned display panel and a camera, and the camera is arranged on a backlight side of the display panel and corresponds to the transparent display area 100A. Since the light transmittance of the transparent display area 100A corresponding to the camera is improved, a good photographing effect of the camera can be ensured. Therefore, the display device of the present disclosure has both a good display effect and an under-screen photographing effect.
Although relative terms such as “upper” and “lower” are used in this specification to describe the relative relationship between one component and another component shown, these terms are used in this specification only for convenience of description, for example, according to the direction shown in the drawings. It can be understood that if a device shown is turned upside down, the component described as “upper” will become the “lower” component. When a structure is “on” another structure, it may mean that the structure is integrally formed on the another structure, or that the structure is “directly” installed on the another structure, or that the structure is “indirectly” installed on the another structure through a further structure.
The terms “a”, “an”, “the”, “said” and “at least one” are used to indicate the presence of one or more elements/components/etc.; the terms “including” and “have” are used to indicate open-ended inclusive means and means that there may be additional elements/components/etc. in addition to the listed elements/components/etc.
Those skilled in the art will easily conceive of other embodiments of the present disclosure after considering the specification and practicing the present invention disclosed herein. The present application is intended to cover any variations, uses, or adaptive changes of the present disclosure. These variations, uses, or adaptive changes follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field that are not disclosed in the present disclosure. The description and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.
Claims
1. A display panel, wherein the display panel has a display area and a peripheral area, the display area comprises a main display area and a transparent display area, and the display panel comprises:
- at least one first sub-pixel, located in the transparent display area, and comprising a first pixel electrode;
- at least one first pixel driving circuit, located in the peripheral area;
- at least one transparent lead, connecting the first pixel electrode and the first pixel driving circuit, so that the first pixel driving circuit drives the first sub-pixel to emit light.
2. The display panel according to claim 1, wherein at least two of the transparent leads are located on different layers, and projections, in a thickness direction of the display panel, of the transparent leads located on the different layers are partially overlapped.
3. The display panel according to claim 1, wherein the transparent lead comprises a first sub-transparent lead and a second sub-transparent lead connected to each other, the first sub-transparent lead extends in a row direction and is located in the peripheral area, and the second transparent sub-lead extends in a column direction and is located at least in the display area.
4. The display panel according to claim 1, wherein the transparent lead comprises a material of ITO, silver nanowire or graphene.
5. The display panel according to claim 1, wherein the display panel further comprises:
- at least one first gate driving circuit, located in the peripheral area;
- at least one first scan line, located in the peripheral area,
- wherein the first scan line connects the first gate driving circuit and the first pixel driving circuit, so that the first gate driving circuit provides the first pixel driving circuit with a scan signal.
6. The display panel according to claim 5, wherein each of the first gate driving circuits and each of the first pixel driving circuits are arranged at a same side of the transparent display area.
7. The display panel according to claim 6, wherein all the first sub-pixels are divided into a plurality of rows, and respective first sub-pixels corresponding to at least one of the first gate driving circuits are located in a same row.
8. The display panel according to claim 7, wherein respective first pixel driving circuits connected to the first sub-pixels located in the same row forms one or more pixel driving circuit islands, and respective pixel driving circuit islands are arranged in a row direction at a side, close to the transparent display area, of the peripheral area.
9. The display panel according to claim 8, wherein the respective pixel driving circuits in the pixel driving circuit island are arranged in the row direction, and the first scan line corresponding to the pixel driving circuit island extends in the row direction and is sequentially connected to the respective pixel driving circuits in the pixel driving circuit island.
10. The display panel according to claim 1, wherein the display panel further comprises:
- at least one second sub-pixel, located in the main display area, and comprising a second sub-pixel electrode; and
- at least one second pixel driving circuit, located in the main display area, electrically connected to the second sub-pixel electrode, and configured to drive the second sub-pixel to emit light,
- wherein pixel densities of the transparent display area and the main display area are same.
11. The display panel according to claim 10, wherein the display panel further comprises:
- at least one second gate driving circuit, located in the peripheral area;
- at least one second scan line, located in the peripheral area and the display area,
- wherein the second scan line connects the second gate driving circuit and the second pixel driving circuit, so that the second gate driving circuit provides the second pixel driving circuit with a scan signal.
12. The display panel according to claim 11, wherein the display panel further comprises:
- a plurality of first data lines, connected to the first pixel driving circuit and the second pixel driving circuit corresponding to the first sub-pixel and the second sub-pixel in a same column,
- wherein the first data line extends along the column direction and bypasses an edge of the transparent display area.
13. A display device, comprising a display panel and a camera,
- wherein the display panel has a display area and a peripheral area, the display area comprises a main display area and a transparent display area, and the display panel comprises:
- at least one first sub-pixel, located in the transparent display area, and comprising a first pixel electrode;
- at least one first pixel driving circuit, located in the peripheral area;
- at least one transparent lead, connecting the first pixel electrode and the first pixel driving circuit, so that the first pixel driving circuit drives the first sub-pixel to emit light, and
- wherein the camera is arranged on a backlight side of the display panel and corresponds to the transparent display area.
14. The display device according to claim 13, wherein at least two of the transparent leads are located on different layers, and projections, in a thickness direction of the display panel, of the transparent leads located on the different layers are partially overlapped.
15. The display device according to claim 13, wherein the transparent lead comprises a first sub-transparent lead and a second sub-transparent lead connected to each other, the first sub-transparent lead extends in a row direction and is located in the peripheral area, and the second transparent sub-lead extends in a column direction and is located at least in the display area.
16. The display device according to claim 13, wherein the transparent lead comprises a material of ITO, silver nanowire or graphene.
17. The display device according to claim 13, wherein the display panel further comprises:
- at least one first gate driving circuit, located in the peripheral area;
- at least one first scan line, located in the peripheral area,
- wherein the first scan line connects the first gate driving circuit and the first pixel driving circuit, so that the first gate driving circuit provides the first pixel driving circuit with a scan signal.
18. The display device according to claim 17, wherein each of the first gate driving circuits and each of the first pixel driving circuits are arranged at a same side of the transparent display area.
19. The display device according to claim 18, wherein all the first sub-pixels are divided into a plurality of rows, and respective first sub-pixels corresponding to at least one of the first gate driving circuits are located in a same row.
20. The display device according to claim 19, wherein respective first pixel driving circuits connected to the first sub-pixels located in the same row forms one or more pixel driving circuit islands, and respective pixel driving circuit islands are arranged in a row direction at a side, close to the transparent display area, of the peripheral area.
Type: Application
Filed: Sep 30, 2020
Publication Date: Sep 22, 2022
Inventors: Yue LONG (Beijing), Yudiao CHENG (Beijing), Qiwei WANG (Beijing), Tianyi CHENG (Beijing), Weiyun HUANG (Beijing), Yao HUANG (Beijing)
Application Number: 17/426,122