Display panel and display device

Abstract

This invention discloses a display panel and a display device. The display panel includes a first display area and a second display area, wherein the light transmittance of the second display area is greater than that of the first display area. The display panel includes: a driving signal line; light-emitting devices, including a first light-emitting device located in the first display area and a second light-emitting device located in the second display area; a first pixel circuit located in the first display area, the first pixel circuit being connected to the driving signal line and used to drive the first light-emitting device to emit light; and a second pixel circuit located in the second display area, the second pixel circuit being connected to the driving signal line, each second pixel circuit being used to drive at least two second light-emitting devices to emit light. The technical solution of this invention helps to increase the area of ​​the transparent display area and realize a full-screen design without a transition area.

Description

Technical Field

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

[0002] With the continuous development of display technology, the screen-to-body ratio of smartphone displays is getting larger and larger, and full-screen displays will become the mainstream of future displays. Current full-screen designs typically use under-display cameras (UDC), which means placing the camera under the display screen.

[0003] In displays, the pixel circuitry for the under-display camera area is typically located in the transition zone. The presence of this transition zone limits the size of the under-display camera area, affecting image quality. Furthermore, the displayed image differs between the under-display camera area and the normal display area, impacting the overall display effect. Summary of the Invention

[0004] This invention provides a display panel and a display device to increase the area of ​​the transparent display area and achieve a full-screen design.

[0005] In a first aspect, embodiments of the present invention provide a display panel, including a first display area and a second display area, wherein the light transmittance of the second display area is greater than that of the first display area, and the display panel includes:

[0006] Drive signal lines;

[0007] The light-emitting device includes a first light-emitting device located in the first display area and a second light-emitting device located in the second display area; and

[0008] A first pixel circuit is located in the first display area. The first pixel circuit is connected to the driving signal line and is used to drive the first light-emitting device to emit light.

[0009] The second pixel circuit is located in the second display area. The second pixel circuit is connected to the driving signal line. Each second pixel circuit is used to drive at least two second light-emitting devices to emit light.

[0010] Optionally, the display panel includes a substrate and thin-film transistors located on the substrate that form the first pixel circuit and the second pixel circuit;

[0011] The second light-emitting device includes a first electrode, which is located on the side of the thin-film transistor away from the substrate;

[0012] The first electrodes of each of the second light-emitting devices driven by the second pixel circuit are connected in series via a transparent connecting line.

[0013] Optionally, the display panel further includes:

[0014] A planarization layer is located between the substrate and the first electrode;

[0015] The transparent connecting line is located between the first electrode and the planarization layer, or the transparent connecting line is disposed in the same layer as the first electrode;

[0016] Preferably, the transparent connecting wire is made of indium tin oxide and / or indium zinc oxide.

[0017] Optionally, the display panel includes a substrate and thin-film transistors located on the substrate that form the first pixel circuit and the second pixel circuit;

[0018] The second light-emitting device includes a first electrode, which is located on the side of the thin-film transistor away from the substrate;

[0019] The thin-film transistors located in the second display area are dispersed between the first electrode and the substrate in the second display area, and the vertical projection of the first electrode on the substrate overlaps with the vertical projection of the thin-film transistors on the substrate.

[0020] Optionally, in the second display area, the vertical projection of the thin-film transistor on the substrate overlaps with the vertical projection of the plurality of first electrodes on the substrate.

[0021] Optionally, the drive signal line of the second display area includes a first trace and a second trace, which are alternately connected;

[0022] The first trace is connected to the thin-film transistor in the second pixel circuit;

[0023] The second routing section is a transparent routing section;

[0024] Preferably, the material of the second trace portion includes indium tin oxide and / or indium zinc oxide.

[0025] Optionally, the driving signal line is a data line, and the first trace is connected to the source or drain of the thin-film transistor in the second pixel circuit.

[0026] Optionally, the driving signal line is a scan line, and the first trace is connected to the gate of the thin-film transistor in the second pixel circuit.

[0027] Optionally, the display panel further includes:

[0028] Multiple metal layers are located on the substrate, including a first metal layer, a second metal layer and a third metal layer sequentially disposed from the side of the substrate near the first electrode; the first electrode of the storage capacitor in the first pixel circuit and the second pixel circuit is located on the first metal layer, the second electrode of the storage capacitor is located on the second metal layer, and the first trace portion of the driving signal line is located on the first metal layer or the third metal layer.

[0029] A planarization layer is located between the metal layer and the first electrode; the second trace portion of the drive signal line is located between the first metal layer and the second metal layer, or between the planarization layer and the third metal layer.

[0030] Secondly, embodiments of the present invention also provide a display device, including the display panel described in the first aspect, the display device further including a photosensitive device, the photosensitive device being disposed on the non-display side of the display panel and corresponding to the second display area.

[0031] The display device provided in this embodiment of the invention includes a display panel with a first display area and a second display area. The light transmittance of the second display area is greater than that of the first display area. The display panel includes a driving signal line, a first pixel circuit and a second pixel circuit for light-emitting devices. The light-emitting devices include a first light-emitting device located in the first display area and a second light-emitting device located in the second display area. The first pixel circuit is located in the first display area and is used to drive the first light-emitting device to emit light. The second pixel circuit is located in the second display area, and each second pixel circuit is used to drive at least two second light-emitting devices to emit light. Both the first pixel circuit and the second pixel circuit are connected to the driving signal line, so that the first pixel circuit and the second pixel circuit can simultaneously drive the light-emitting devices in the first display area and the second display area to emit light, which helps to reduce the difference in display effect between the first display area and the second display area. The second pixel circuit is located in the second display area, eliminating the need for an additional transition area. This avoids the problem of limiting the size of the transparent display area by placing the pixel circuit of the transparent display area in the transition area, which is beneficial to increasing the area of ​​the second display area and thus improving the light sensitivity of the second display area. Furthermore, each second pixel circuit is used to drive at least two light-emitting devices in the second display area to emit light, which can reduce the number of pixel circuits in the second display area, thereby increasing the light transmittance of the second display area and further enhancing the light sensitivity of the second display area, achieving a true full-screen design without a transition zone. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;

[0039] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0041] As described in the background section, existing display devices suffer from limitations in the size of the under-display camera area and discrepancies in the displayed images between the under-display camera area and the normal display area. The inventors have discovered the reasons for these problems as follows: Existing display devices typically place the camera under the screen. To avoid affecting the camera's image quality, the screen is divided into a transparent display area (under-display camera area) and a normal display area. The camera is placed below the transparent display area, and the transparent and normal display areas are driven and displayed independently. In existing technology, a transition area is also included between the transparent and normal display areas, where the pixel circuitry of the transparent display area is generally placed. The existence of this transition area limits the size of the transparent display area, affecting the camera's image quality. Furthermore, if the combined area of ​​the transition area and the transparent display area is too large, it will hinder the realization of a full-screen display. In addition, because the transparent and normal display areas are driven independently, discrepancies arise between the displayed images, affecting the display effect.

[0042] To address the aforementioned problems, embodiments of the present invention provide a display panel. Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention. Figure 2This is a schematic diagram of the structure of a display device provided in an embodiment of the present invention. (In conjunction with...) Figure 1 and Figure 2 The display panel 100 has a display area AA and a non-display area NAA. The display area AA includes a first display area A1 and a second display area A2. The light transmittance of the second display area A2 is greater than that of the first display area A1. The display panel 100 includes: a driving signal line, light-emitting devices, a plurality of first pixel circuits 10 and a plurality of second pixel circuits 20. The light-emitting devices include a first light-emitting device D1 located in the first display area A1 and a second light-emitting device D2 located in the second display area A2. The first pixel circuits 10 are located in the first display area A1 and are connected to the driving signal line. The first pixel circuits 10 are used to drive the first light-emitting device D1 in the first display area A1 to emit light. The second pixel circuits 20 are located in the second display area A2 and are connected to the driving signal line. Each second pixel circuit 20 is used to drive at least two second light-emitting devices D2 in the second display area A2 to emit light. Figure 1 This illustrates the case where the second pixel circuit 20 is connected to two second light-emitting devices D2.

[0043] In this display device 400, the first display area A1 is a normal display area, and the second display area A2 is a transparent display area. A photosensitive device, such as an under-display camera, can be installed on the non-display side of the display panel 100 corresponding to the second display area A2. In display mode, both the first display area A1 and the second display area A2 emit light normally. In camera mode, the first display area A1 can still emit light. Because the second display area A2 has higher light transmittance, ambient light can pass through it and reach the under-display camera, enabling the camera to sense light and capture images.

[0044] See Figure 1 The driving signal lines can be data lines (DL1~DLj) and / or scan lines (GL1~GLk). Each row of the first pixel circuit 10 is connected to the same scan line, and each column of the first pixel circuit 10 is connected to the same data line. Similarly, each row of the second pixel circuit 20 is connected to the same scan line, and each column of the second pixel circuit 20 is connected to the same data line. The first pixel circuit 10 and the second pixel circuit 20 located in the same row of the display panel can be connected to the same scan line, and the first pixel circuit 10 and the second pixel circuit 20 located in the same column of the display panel can be connected to the same data line. Since both the first pixel circuit 10 and the second pixel circuit 20 are connected to the driving signal lines, they can simultaneously drive the light-emitting devices in the first display area A1 and the second display area A2, which helps to reduce the difference in display effect between the first display area A1 and the second display area A2.

[0045] The structures of the first pixel circuit 10 and the second pixel circuit 20 can be the same. Figure 1 The diagram schematically illustrates a circuit structure of a first pixel circuit 10 and a second pixel circuit 20. Each pixel circuit includes a driving transistor Tdrv, a switching transistor Tsw, and a storage capacitor C, and is connected to a light-emitting device. When a scan signal in the form of a pulse signal is input to the scan line, the switching transistor Tsw in the pixel circuit connected to the scan line is turned on. At this time, the switching transistor Tsw can receive the data voltage signal transmitted by the data line. The storage capacitor C stores the data voltage signal, and the driving transistor Tdrv can drive the light-emitting device to emit light at a corresponding brightness according to the data voltage signal stored in the storage capacitor C. The light-emitting device can be an organic light-emitting diode (OLED).

[0046] Figure 3 This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention. Figure 3 The diagram schematically illustrates another circuit structure of the first pixel circuit 10 and the second pixel circuit 20, which are connected to light-emitting devices (the first pixel circuit 10 is connected to the first light-emitting device D1, and the second pixel circuit 20 is connected to the second light-emitting device D2). During the data writing phase, when a scan signal Scan1 in the form of a pulse signal is input to the scan line, the first transistor T1 in the row of pixel circuits connected to the scan line is turned on. At this time, the first transistor T1 can receive the data voltage signal Vdata transmitted by the data line, and the storage capacitor C stores the data voltage signal Vdata. During the light-emitting phase, the light-emitting control signal EM1 is input to the light-emitting control signal line in the display panel, and the second transistor T2 and the third transistor T3 are turned on. The first power supply voltage signal VDD and the second power supply voltage signal VSS provide power, enabling the driving transistor DT to drive the light-emitting device to emit light at a corresponding brightness according to the data voltage signal stored in the storage capacitor C.

[0047] It should be noted that when Figure 1 and Figure 3 When the pixel circuit shown is the circuit structure of the second pixel circuit 20, Figure 1 and Figure 3 Only one second light-emitting device D2 connected to the second pixel circuit 20 is shown. In fact, the second pixel circuit 20 in this embodiment of the invention can drive at least two second light-emitting devices D2 to emit light. For example, when the second pixel circuit 20 drives two second light-emitting devices D2 to emit light... Figure 1 and Figure 3 The anode of the second light-emitting device D2 can also be connected to the anode of another light-emitting device.

[0048] The second pixel circuit 20 is located in the second display area A2. Compared with the prior art, which places the pixel circuit of the transparent display area in the transition area between the transparent display area and the normal display area, this solution does not require a transition area for placing the second pixel circuit 20 between the first display area A1 and the second display area A2. This solution avoids the problem that the existence of the transition area in the prior art limits the size of the second display area A2. This solution is beneficial to increasing the area of ​​the second display area A2 with higher light transmittance, thereby improving the light sensitivity of the second display area A2.

[0049] Each second pixel circuit 20 is used to drive at least two second light-emitting devices D2 in the second display area A2 to emit light. Compared with the prior art, where one pixel circuit is used to drive only one light-emitting device, this solution can reduce the number of second pixel circuits 20 in the second display area A2, thereby increasing the light transmittance of the second display area A2 and improving the light sensitivity of the second display area A2.

[0050] The display panel provided in this embodiment of the invention has a display area and a non-display area. The display area includes a first display area and a second display area. The display panel includes a driving signal line, a light-emitting device, a first pixel circuit, and a second pixel circuit. The light-emitting device includes a first light-emitting device located in the first display area and a second light-emitting device located in the second display area. The first pixel circuit is located in the first display area and is connected to the driving signal line. The first pixel circuit is used to drive the light-emitting device in the first display area to emit light. The second pixel circuit is located in the second display area and is connected to the driving signal line. Each second pixel circuit is used to drive at least two light-emitting devices in the second display area to emit light. The light transmittance of the second display area is greater than that of the first display area. Both the first pixel circuit and the second pixel circuit are connected to the driving signal line, enabling the first pixel circuit and the second pixel circuit to simultaneously drive the light-emitting devices in the first display area and the second display area to emit light, which helps to reduce the difference in display effect between the first display area and the second display area. The second pixel circuit is located in the second display area, avoiding the problem in the prior art where the pixel circuit of the transparent display area is placed in the transition area, which limits the size of the transparent display area. The technical solution of this embodiment of the invention does not require an additional transition area, which is beneficial to increasing the area of ​​the second display area, thereby improving the light sensitivity of the second display area. Each second pixel circuit drives at least two light-emitting devices in the second display area to emit light. Compared with the prior art, this reduces the number of pixel circuits in the second display area, thereby increasing the light transmittance of the second display area and further enhancing its light sensitivity. The technical solution of this invention helps to increase the area of ​​the transparent display area, achieving a full-screen design without a transition zone.

[0051] See Figure 1Based on the above scheme, for example, the pixel density of the second display area A2 can be set to be the same as that of the first display area A1. Pixel density (Pixels Per Inch, PPI) refers to the number of pixels per inch in a display area, where a pixel represents the smallest display unit in the display image, such as a display unit composed of red, green, and blue sub-pixels. The light-emitting devices of the first display area A1 and the second display area A2 can be configured to make their pixel densities the same. The advantage of this configuration is that it helps to increase the pixel density of the second display area A2, making the display effects of the first display area A1 and the second display area A2 consistent, thereby reducing the difference in display effects between the first display area A1 and the second display area A2, which is beneficial for the realization of a full-screen display.

[0052] Figure 4 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention, specifically it can be... Figure 1 A top view of a portion of the second display area A2 of the display panel shown. Figure 5 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, specifically it can be... Figure 1 A cross-sectional view of a portion of the second display area A2 of the display panel shown. (Combined with...) Figure 1 , Figure 4 and Figure 5 The display panel 100 includes a substrate 110 and thin-film transistors T located on the substrate 110, which constitute a first pixel circuit 10 and a second pixel circuit 20; the second light-emitting device D2 includes a first electrode 120 located on the side of the thin-film transistor T away from the substrate 110; the first electrodes 120 of each second light-emitting device D2 driven by each second pixel circuit 20 are connected in series through a transparent connecting line L.

[0053] The substrate 110 can provide buffering, protection, or support for the display panel. The substrate 110 can be a flexible substrate, made of materials such as polyimide (PI), polyethylene naphthalate (PEN), or polyethylene terephthalate (PET), or a mixture of these materials. Alternatively, the substrate 110 can be a rigid substrate made of materials such as glass. The thin-film transistors constituting the first pixel circuit 10 and the second pixel circuit 20 can be... Figure 1 The driving transistor Tdrv and the switching transistor Tsw shown can also be Figure 3 The transistors in the pixel circuit shown include, for example, the driving transistor DT, the first transistor T1, the second transistor T2, and the third transistor T3. Figure 5 The thin-film transistor T shown can be, for example, a... Figure 3The pixel circuit shown illustrates a third transistor T3 connected to the first electrode of the second light-emitting device D2. The second light-emitting device D2 includes a first electrode 120, a light-emitting layer 130, and a second electrode 140. The first electrode 120 can be the anode of the second light-emitting device D2, and correspondingly, the second electrode 140 can be the cathode of the second light-emitting device D2. The light-emitting layer 130 can be a red, green, or blue light-emitting layer, thereby enabling the display of multiple colors.

[0054] Figure 4 This schematically illustrates the use of each second pixel circuit 20 to drive the four second light-emitting devices in the second display area to emit light. For example, see [link to example]. Figure 4 In the second display area, the display sub-units of the display panel include red sub-pixels PX1, green sub-pixels PX2, and blue sub-pixels PX3. Each sub-pixel area is equipped with a light-emitting device of the corresponding light-emitting color. Figure 4 Only the first electrode 120 of the light-emitting device in each sub-pixel region is shown, including the first electrode 120(1) of the light-emitting device in the red sub-pixel PX1 region, the first electrode 120(2) of the light-emitting device in the green sub-pixel PX2 region, and the first electrode 120(3) of the light-emitting device in the blue sub-pixel PX3 region. Exemplarily, for the three second pixel circuits 20 in this second display area, each second pixel circuit 20 is used to drive four light-emitting devices of one emission color to emit light. For example, one second pixel circuit 20 is used to drive the light-emitting devices in the four red sub-pixel PX1 regions to emit light, and the first electrodes 120(1) of the four light-emitting devices are connected in series via a transparent connection line L; one second pixel circuit 20 is used to drive the light-emitting devices in the four green sub-pixel PX2 regions to emit light, and the first electrodes 120(2) of the four light-emitting devices are connected in series via a transparent connection line L; one second pixel circuit 20 is used to drive the light-emitting devices in the four blue sub-pixel PX3 regions to emit light, and the first electrodes 120(3) of the four light-emitting devices are connected in series via a transparent connection line L. When each second pixel circuit 20 is operational, the generated driving current can be transmitted to the first electrode of the corresponding four light-emitting devices, thus enabling one second pixel circuit 20 to drive four light-emitting devices to emit light. Therefore, as... Figure 4 In the 12 sub-pixel areas shown, only three second pixel circuits 20 are set to drive the 12 light-emitting devices in the area to emit light. Compared with the prior art, the number of pixel circuits is significantly reduced, which is beneficial to improving the light transmittance of the second display area and thus improving the light sensitivity of the second display area.

[0055] Combination Figure 1 , Figure 4 and Figure 5The transparent connecting line L can be a connecting line with a transparent conductive structure. The first electrode 120 of each second light-emitting device D2 can be connected to the transparent connecting line L through a via. Since the transparent connecting line L has high light transmittance, the first electrode 120 of each second light-emitting device D2 driven by each second pixel circuit 20 can be connected in series through the transparent connecting line L, which can further improve the light transmittance of the second display area, thereby improving the light-sensing effect of the second display area.

[0056] For example, the transparent connecting line L is made of at least one of indium tin oxide (ITO) and indium zinc oxide (IZO), that is, the transparent connecting line L is made of ITO, or IZO, or both (for example, ITO and IZO form a stacked structure). Both indium tin oxide and indium zinc oxide are transparent semiconductor conductive materials with good conductivity and transparency. The light transmittance of ITO can reach more than 90%, and the light transmittance of IZO is also relatively high. Setting the transparent connecting line L to be made of at least one of ITO and IZO helps to improve the light transmittance of the second display area.

[0057] Combination Figure 1 , Figure 4 and Figure 5 For example, the display panel 100 includes a substrate 110 and thin-film transistors T located on the substrate 110 that form a first pixel circuit 10 and a second pixel circuit 20; the second light-emitting device D2 includes a first electrode 120 located on the side of the thin-film transistor T away from the substrate 110; the thin-film transistors T of the second display area A2 are dispersed between the first electrode 120 of the second display area A2 and the substrate 110, and the vertical projection of the first electrode 120 on the substrate 110 overlaps with the vertical projection of the thin-film transistor T on the substrate 110.

[0058] Specifically, the vertical projection of the first electrode 120 onto the substrate 110 overlaps with the vertical projection of the thin-film transistor T onto the substrate 110. This means that the thin-film transistor T of the second pixel circuit 20 is disposed directly below the first electrode 120 (e.g., in the direction of the substrate 110 relative to the first electrode 120) and is covered by the first electrode 120. The thin-film transistors T of the second display area A2 are dispersed between the first electrode 120 and the substrate 110 of the second display area A2, for example, Figure 4The thin-film transistors in the three second pixel circuits 20 shown are distributed below the first electrodes 120(1), 120(2), and 120(3) of the light-emitting devices in the three adjacent sub-pixel regions (red sub-pixel PX1 region, green sub-pixel PX2 region, and blue sub-pixel PX3 region) they drive. This arrangement helps to improve the light transmittance of the second display area where thin-film transistors T are not located, and also improves the light transmittance of the gap between adjacent light-emitting devices in the region where thin-film transistors T are located, thereby enhancing the light sensitivity of the second display area.

[0059] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, specifically it can be... Figure 1 Another top view of a portion of the second display area A2 of the display panel shown. Combined with... Figure 1 and Figure 6 For example, the thin-film transistors T of the second display area A2 are dispersed between the first electrode 120 and the substrate 110 of the second display area A2, or may be as follows: Figure 6 The thin-film transistors T in the three second pixel circuits 20 shown are distributed below the first electrode 120 of the light-emitting device in the non-adjacent sub-pixel regions they drive. Figure 4 Compared with the scheme shown, this scheme disperses the thin-film transistors T in different second pixel circuits 20 below the first electrode in different regions, which can further improve the light transmittance of the second display area, thereby further improving the light sensitivity of the second display area.

[0060] Combination Figure 1 and Figure 6 For example, in the second display area A2, the vertical projection of the thin-film transistor T onto the substrate 110 overlaps with the vertical projections of the plurality of first electrodes 120 onto the substrate 110. This overlap means that the thin-film transistor T is positioned directly below the first electrodes 120, and one thin-film transistor T can be covered by the plurality of first electrodes 120. For example... Figure 6The thin-film transistor T in the second pixel circuit 20(1) shown can be covered by the first electrode 120(1) in the red sub-pixel PX1 region on the left and the first electrode 120(2) in the green sub-pixel PX2 region. The thin-film transistor T in the second pixel circuit 20(3) can be covered by the first electrode 120(1) in the red sub-pixel PX1 region on the right and the first electrode 120(2) in the green sub-pixel PX2 region. Setting the vertical projection of the thin-film transistor T on the substrate 110 to overlap with the vertical projection of the multiple first electrodes 120 on the substrate 110 also helps to improve the light transmittance of the second display area, thereby improving the light sensitivity of the second display area.

[0061] Figure 7 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, specifically it can be... Figure 1 Another cross-sectional view of a portion of the second display area A2 of the display panel shown. (Combined with...) Figure 4 , Figure 6 and Figure 7 The driving signal line 30 of the second display area includes a first trace 31 and a second trace 32, which are alternately connected; the first trace 31 is connected to the thin film transistor T in the second pixel circuit 20; the second trace 32 is a transparent trace.

[0062] In this configuration, the second pixel circuit 20 is connected to the driving signal line 30. Each driving signal line 30 connects to a row of second pixel circuits 20, enabling the driving signal line 30 to transmit signals to a row of second pixel circuits 20. Alternatively, each driving signal line 30 connects to a column of second pixel circuits 20, enabling the driving signal line 30 to transmit signals to a column of second pixel circuits 20. The first trace portion 31 of the driving signal line 30 connects to the thin-film transistor T in the second pixel circuit 20. The second trace portion 32 connects to different second pixel circuits 20 in a row (or column) through two adjacent first trace portions 31. In this way, different second pixel circuits 20 in the second display area are connected through the second trace portion 32, and the second trace portion 32 is a transparent trace portion, which helps to improve the light transmittance of the area between different second pixel circuits 20 in the second display area, thereby further improving the light sensitivity of the second display area.

[0063] It should be noted that, Figure 4 The diagram illustrates a scenario where three second pixel circuits 20 are arranged in a row in adjacent sub-pixel regions, and the driving signal line 30 connects to the thin-film transistors in the three second pixel circuits 20 via the first trace 31. In practical applications, the number of second pixel circuits 20 connected to the first trace 31 can be set according to the actual layout of the second pixel circuits 20. Figure 6The diagram shows a scenario where the second pixel circuit 20(1) and the second pixel circuit 20(2) are located in adjacent sub-pixel regions, and the second pixel circuit 20(3) is located in other sub-pixel regions. In this case, the driving signal line 30 is connected to the thin-film transistors in the second pixel circuit 20(1) and the second pixel circuit 20(2) through the first wiring portion 31, and is connected to the thin-film transistors in the second pixel circuit 20(3) through other first wiring portions 31. The first wiring portions 31 connecting the second pixel circuit 20(1) and the second pixel circuit 20(2), as well as the first wiring portion 31 connecting the second pixel circuit 20(3), are connected through the second wiring portion 32.

[0064] For example, the material of the second trace portion 32 includes at least one of indium tin oxide and indium zinc oxide, that is, the material of the second trace portion 32 includes ITO, or includes IZO, or includes both ITO and IZO (for example, ITO and IZO form a stacked structure). Indium tin oxide (ITO) and indium zinc oxide (IZO) are both transparent semiconductor conductive materials with good conductivity and transparency. The light transmittance of ITO can reach more than 90%, and the light transmittance of IZO is also high. Setting the material of the second trace portion 32 to include either ITO or IZO helps to improve the light transmittance of the second display area.

[0065] Combination Figure 3 , Figure 4 and Figure 6 For example, the drive signal line 30 is a data line DL, and the first trace 31 is connected to the source or drain of the thin film transistor in the second pixel circuit 20.

[0066] Specifically, when the drive signal line 30 is a data line DL, the data line DL can be connected to the source or drain of the thin-film transistor through the first trace portion 31. For example, the data line DL can be connected through the first trace portion 31 to... Figure 3 The source or drain of the first transistor T1 in the second pixel circuit 20 is connected to the second trace 32, and the second trace 32 is connected to two adjacent first traces 31 in a row (only one first trace 31 connected to each second trace 32 is shown in the figure), so that the data voltage signal Vdata on the data line DL can be transmitted to the first transistor T1 in the second pixel circuit 20 through the first trace 31 and the second trace 32.

[0067] Combination Figure 3 , Figure 4 and Figure 6 For example, the drive signal line 30 can also be a scan line GL, and the first trace 31 is connected to the gate of the thin film transistor in the second pixel circuit 20.

[0068] Specifically, when the drive signal line 30 is a scan line GL, the scan line GL can be connected to the gate of the thin-film transistor through the first trace portion 31. For example, the scan line GL can be connected through the first trace portion 31 to... Figure 3 The gate of the first transistor T1 in the middle, the second trace 32 connects two adjacent first traces 31 in a row ( Figure 4 Only one first trace 31 is shown connected to each second trace 32, so that the scan signal Scan1 on the scan line GL can be transmitted to the first transistor T1 in the second pixel circuit 20 through the first trace 31 and the second trace 32.

[0069] Combination Figure 3 , Figure 4 and Figure 6 For example, the driving signal line 30 can also be the light emission control signal line EM, and the first trace 31 is connected to the gate of the thin film transistor in the second pixel circuit 20.

[0070] Specifically, when the driving signal line 30 is the light emission control signal line EM, the light emission control signal line EM can be connected to the gate of the thin-film transistor through the first trace portion 31. For example, the light emission control signal line EM can be connected through the first trace portion 31 to... Figure 3 The gate of the second transistor T2 and the gate of the third transistor T3 are connected by the second trace 32, which connects two adjacent first traces 31 in a row. Figure 4 Only one first trace 31 is shown connected to each second trace 32, so that the light emission control signal EM1 on the light emission control signal line EM can be transmitted to the second transistor T2 and the third transistor T3 in the row of second pixel circuit 20 through the first trace 31 and the second trace 32.

[0071] Combination Figure 4 , Figure 6 and Figure 7 For example, the display panel 100 further includes: a plurality of metal layers located on the substrate 110, the plurality of metal layers including a first metal layer M1, a second metal layer M2 and a third metal layer M3 sequentially disposed from the side of the substrate 110 near the first electrode 120; the first metal layer M1 includes the first electrode C1 of the storage capacitor C in the first pixel circuit 10 and the second pixel circuit 20, the second metal layer M2 includes the second electrode C2 of the storage capacitor C, the first trace portion 31 of the driving signal line 30 is located in the first metal layer M1 or the third metal layer M3; a planarization layer 150 is located between the metal layers and the first electrode 120; the second trace portion 32 of the driving signal line 30 is located in the second metal layer M2.

[0072] The planarization layer 150 covers the thin-film transistor T and other film layers between the substrate 110 and the first electrode 120, thereby improving the planarity of the first electrode 120. When the drive signal line 30 is a data line DL, the first trace portion 31 of the data line DL can be located in the third metal layer M3 so that the first trace portion 31 of the data line DL connects to the source 112 or drain 113 of the thin-film transistor T in the third metal layer M3. When the drive signal line 30 is a scan line GL, the first trace portion 31 of the scan line GL (not shown in the figure) can be located in the first metal layer M1 so that the first trace portion 31 of the scan line GL connects to the gate of the thin-film transistor T in the first metal layer M1. The second trace portion 32 of the drive signal line 30 is located in the second metal layer M2. The advantage of this arrangement is that, in the manufacturing process of the display panel, the second electrode C2 of the storage capacitor C in the second metal layer M2 and the second trace portion 32 can be manufactured in the same process without changing the subsequent manufacturing processes of the third metal layer M3, the planarization layer 150 and the second light-emitting device D2.

[0073] For example, the second trace portion 32 of the drive signal line 30 can also be located between the first metal layer M1 and the second metal layer M2. In this embodiment, another metal layer can be disposed between the first metal layer M1 and the second metal layer M2, and the second trace portion 32 can be disposed between the first metal layer M1 and the second metal layer M2. The advantage of this arrangement is that it will not affect the subsequent manufacturing processes of the second metal layer M2, the third metal layer M3, the planarization layer 150, and the second light-emitting device D2 in the manufacturing process of the display panel.

[0074] Figure 8 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention, specifically it can be... Figure 1 Another cross-sectional view of a portion of the second display area A2 of the display panel shown. (Combined with...) Figure 4 , Figure 6 and Figure 8 The second trace portion 32 of the driving signal line 30 can also be located between the planarization layer 150 and the third metal layer M3. Specifically, in this embodiment, a fourth metal layer M4 can also be provided between the planarization layer 150 and the third metal layer M3, and the second trace portion 32 can be provided in the fourth metal layer M4. In this way, in the manufacturing process of the display panel, the manufacturing process of the second trace portion 32 will not affect the manufacturing process of the substrate 110, the first metal layer M1, the second metal layer M2, the third metal layer M3, and the second light-emitting device D2.

[0075] Combination Figures 4 to 6For example, the display panel 100 further includes a planarization layer 150 located between the substrate 110 and the first electrode 120, and the transparent connection line L may be located between the planarization layer 150 and the thin-film transistor T. Specifically, the film layer between the planarization layer 150 and the thin-film transistor T of the display panel may be... Figure 5 The fourth metal layer M4 shown can be provided with a transparent connecting line L, and the first electrode 120 is connected to the transparent connecting line L through a via. In this way, the fabrication process of the transparent connecting line L will not affect the fabrication process of the substrate 110, the first metal layer M1, the second metal layer M2, the third metal layer M3, and the second light-emitting device D2 in the manufacturing process of the display panel.

[0076] Exemplarily, the transparent connecting line L can also be located between the first electrode 120 and the planarization layer 150 (not shown in the figure). In this embodiment, a metal layer can also be disposed between the first electrode 120 and the planarization layer 150, and the transparent connecting line L can be disposed in the metal layer. In the manufacturing process of the display panel, the transparent connecting line L can be fabricated after the fabrication process of the planarization layer 150 is completed, and then the fabrication of the second light-emitting device D2 can continue. The advantage of this arrangement is that it will not affect the fabrication processes of the various film layers between the substrate 110 and the planarization layer 150, as well as the fabrication processes of the second light-emitting device D2, etc.

[0077] For example, the transparent connecting line L can also be disposed in the same layer as the first electrode 120 (not shown in the figure). Specifically, in the manufacturing process of the display panel, the transparent connecting line L and the first electrode 120 can be fabricated simultaneously on the planarization layer 150 after the fabrication process of the planarization layer 150 is completed. The advantage of this arrangement is that it will not affect the fabrication process of each film layer between the substrate 110 and the planarization layer 150.

[0078] This invention also provides a display device, combined with Figure 1 and Figure 2 The display device 400 includes the display panel 100 in any of the above embodiments of the present invention. The display device 400 also includes a photosensitive device (not shown in the figure), which is disposed on the non-display side of the display panel 100 and corresponds to the second display area A2.

[0079] Specifically, the display device 400 can be an electronic device with display function, such as a mobile phone, tablet computer, or smart wearable device. Figure 2 The illustration schematically depicts a mobile phone as the display device 400. The light sensor can be an under-display camera. Because the second display area A2 has high light transmittance, ambient light can pass through the second display area A2 and enter the under-display camera, enabling the under-display camera to sense light and take pictures.

[0080] The display device provided in this embodiment of the invention includes a display panel and a photosensitive device disposed on the non-display side of the display panel, with the area of ​​the photosensitive device corresponding to a second display area. The display panel has a display area and a non-display area, and includes a driving signal line, a light-emitting device, a first pixel circuit, and a second pixel circuit. The light-emitting device includes a first light-emitting device located in the first display area and a second light-emitting device located in the second display area. The first pixel circuit is located in the first display area and is connected to the driving signal line, and is used to drive the light-emitting device in the first display area to emit light. The second pixel circuit is located in the second display area and is connected to the driving signal line, and each second pixel circuit is used to drive at least two light-emitting devices in the second display area to emit light. The transmittance of the second display area is greater than that of the first display area. Both the first pixel circuit and the second pixel circuit are connected to the driving signal line, enabling the first pixel circuit and the second pixel circuit to simultaneously drive the light-emitting devices in the first display area and the second display area to emit light, which helps to reduce the difference in display effect between the first display area and the second display area. The second pixel circuit is located in the second display area, avoiding the problem in existing technologies where placing the pixel circuit of the transparent display area in the transition zone limits the size of the transparent display area. The technical solution of this invention eliminates the need for an additional transition zone, which helps to increase the area of ​​the second display area and thus improve its light sensitivity. Each second pixel circuit drives at least two light-emitting devices in the second display area to emit light. Compared with existing technologies, this reduces the number of pixel circuits in the second display area, thereby increasing the light transmittance of the second display area and further enhancing its light sensitivity. The technical solution of this invention helps to increase the area of ​​the transparent display area and achieve a full-screen design without a transition zone.

[0081] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A display panel, comprising a first display area and a second display area, characterized in that, The second display area has a light transmittance greater than that of the first display area, and the display panel comprises: a driving signal line; a light emitting device, comprising a first light emitting device in the first display area and a second light emitting device in the second display area; and a first pixel circuit in the first display area, connected to the driving signal line, for driving the first light emitting device to emit light; a second pixel circuit in the second display area, connected to the driving signal line, each of the second pixel circuits being configured to drive at least two second light emitting devices to emit light; the second display area being a transparent display area, and a camera being arranged below the transparent display area; the display panel comprises a substrate and thin film transistors on the substrate, the thin film transistors constituting the first pixel circuit and the second pixel circuit; the second light emitting device comprises a first electrode, the first electrode being located on a side of the thin film transistor away from the substrate; the thin film transistors in the second display area are dispersedly arranged between the first electrodes and the substrate in the second display area, and a vertical projection of the first electrode on the substrate and a vertical projection of the thin film transistor on the substrate overlap each other; in the second display area, a vertical projection of at least one of the thin film transistors on the substrate and vertical projections of a plurality of the first electrodes on the substrate overlap each other.

2. The display panel of claim 1, wherein, the display panel comprises a substrate and thin film transistors on the substrate, the thin film transistors constituting the first pixel circuit and the second pixel circuit; the second light emitting device comprises a first electrode, the first electrode being located on a side of the thin film transistor away from the substrate; first electrodes of the second light emitting devices driven by each of the second pixel circuits are connected in series by transparent connection lines.

3. The display panel of claim 2, wherein, the display panel further comprises: a planarization layer between the substrate and the first electrode; the transparent connection lines are located between the first electrodes and the planarization layer, or the transparent connection lines are arranged in the same layer as the first electrodes.

4. The display panel of claim 3, wherein, a material of the transparent connection lines comprises indium tin oxide and / or indium zinc oxide.

5. The display panel of claim 1, wherein, the driving signal line in the second display area comprises a first wire part and a second wire part, the first wire part and the second wire part being alternately connected; the first wire part is connected to a thin film transistor in the second pixel circuit; the second wire part is a transparent wire part.

6. The display panel of claim 5, wherein, a material of the second wire part comprises indium tin oxide and / or indium zinc oxide.

7. The display panel of claim 5, wherein, the driving signal line is a data line, and the first wire part is connected to a source electrode or a drain electrode of a thin film transistor in the second pixel circuit.

8. The display panel of claim 5, wherein, the driving signal line is a scan line, and the first wire part is connected to a gate electrode of a thin film transistor in the second pixel circuit.

9. The display panel of claim 5, wherein, the display panel further comprises: A plurality of metal layers on the substrate, the plurality of metal layers comprising a first metal layer, a second metal layer and a third metal layer arranged in sequence from the side of the substrate close to the first electrode; a first plate of a storage capacitor in the first pixel circuit and the second pixel circuit is located on the first metal layer, a second plate of the storage capacitor is located on the second metal layer, and a first routing part of the driving signal line is located on the first metal layer or the third metal layer; A planarization layer between the metal layer and the first electrode; a second routing part of the driving signal line is located between the first metal layer and the second metal layer, or between the planarization layer and the third metal layer.

10. A display device, characterized by comprising: The display device comprises the display panel of any one of claims 1-9, and further comprises a photosensitive device arranged on a non-display side of the display panel and corresponding to the second display area.

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