Display panel and display device
By setting a transparent conductive layer and light-emitting devices in the optical component area, the problems of low display area ratio and poor imaging effect are solved, achieving full-screen display and high light transmittance uniformity, and improving the imaging effect of the optical component area.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN TIANMA MICRO ELECTRONICS CO LTD
- Filing Date
- 2020-08-07
- Publication Date
- 2026-06-23
Smart Images
Figure CN115843201B_ABST
Abstract
Description
[0001] This application is a divisional application filed on August 7, 2020, with application number 202010789153.4 and titled "A Display Panel and Display Device". Technical Field
[0002] This invention relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology
[0003] The rapid development of display technology has opened up endless possibilities for electronic terminals. In particular, the rapid application of display technologies represented by Organic Light-Emitting Diode (OLED) has led to the rapid promotion of mobile terminals featuring "full-screen," "notch-screen," "under-display sound," and "under-display fingerprint" as selling points. Major mobile phone and panel manufacturers have launched many products touting "full-screen" displays, but most still use designs similar to "notch-screen" or "waterdrop-screen" displays. This is because mobile terminals have front-facing cameras, necessitating the reservation of a certain area for them; that is, the current display panel has a relatively low display area ratio. To solve the problem of low display area ratio, engineers have developed a technology where the display interface is completely covered by the screen, i.e., the photosensitive element is designed under the screen. Although existing under-display photosensitive element display panels increase the screen-to-body ratio, their image quality is relatively poor. Summary of the Invention
[0004] In view of this, the present invention provides a display panel and display device that effectively solves the technical problems existing in the related technologies, improves the light transmission uniformity of the light-transmitting area in the optical component area, and thus improves the image acquisition effect of the corresponding optical devices in the optical component area.
[0005] To achieve the above objectives, the technical solution provided by the present invention is as follows:
[0006] A display panel, comprising:
[0007] The display area includes an optical component area and a conventional display area. A first light-emitting device is located in the optical component area, and a second light-emitting device is located in the conventional display area. The first light-emitting device is electrically connected to a first pixel circuit, and the second light-emitting device is electrically connected to a second pixel circuit.
[0008] A transparent conductive layer is provided in the optical component area. The transparent conductive layer includes connecting wires, and the connecting wires include electrode adapter wires that are electrically connected to the first light-emitting device.
[0009] The metal external wiring is electrically connected to the electrode adapter wire and the first pixel circuit outside the optical component area.
[0010] Accordingly, based on the same inventive concept, the present invention also provides a display device, which includes the display panel described above.
[0011] Compared with related technologies, the technical solution provided by this invention has at least the following advantages:
[0012] This invention provides a display panel and a display device. The display area of the display panel includes an optical component area and a conventional display area, both of which include light-emitting devices, resulting in a larger display area and meeting the trend of full-screen display. In the optical component area, a transparent conductive layer covers connecting wires; external metal wires are electrically connected to electrode adapter wires and a first pixel circuit outside the optical component area. The technical solution provided by this application can ensure both the light transmittance of the optical component area and the display effect. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of the present invention;
[0015] Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of the present invention;
[0016] Figure 3 This is a schematic diagram of a display device structure provided in an embodiment of the present invention;
[0017] Figure 4 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0018] Figure 5 This is a schematic diagram of a slit structure provided for an embodiment of the present invention;
[0019] Figure 6 This is a schematic diagram of a pixel driving circuit provided in an embodiment of the present invention;
[0020] Figure 7 A timing diagram provided for an embodiment of the present invention;
[0021] Figure 8This is a schematic diagram of another pixel circuit structure provided in an embodiment of the present invention;
[0022] Figure 9 Another timing diagram provided for an embodiment of the present invention;
[0023] Figure 10 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0024] Figure 11 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0025] Figure 12 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0026] Figure 13 This is a schematic diagram of a cathode connection structure for an optical component area provided in an embodiment of the present invention;
[0027] Figure 14 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0028] Figure 15 This is a schematic diagram of another cathode connection structure for an optical component area provided in an embodiment of the present invention;
[0029] Figure 16 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0030] Figure 17 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0031] Figure 18 This is a schematic diagram illustrating the connection between an auxiliary layer and a power supply voltage signal line, provided in an embodiment of the present invention.
[0032] Figure 19 This is a schematic diagram illustrating the connection between an auxiliary layer and a reference voltage signal line, provided in an embodiment of the present invention.
[0033] Figure 20 This is a schematic diagram of a floating auxiliary layer structure provided in an embodiment of the present invention;
[0034] Figure 21 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present invention;
[0035] Figure 22 This is a schematic diagram of another display device provided in an embodiment of the present invention. Detailed Implementation
[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0037] As described in the background section, existing display panels have a low screen-to-body ratio. To address this issue, engineers have developed a technology that completely covers the display interface, using an under-display sensor design. While existing under-display sensor panels increase the screen-to-body ratio, their image quality is relatively poor.
[0038] In view of this, the present invention provides a display panel and display device that effectively solves the technical problems existing in the related technologies, improves the light transmission uniformity of the light-transmitting area in the optical component area, and thus improves the image acquisition effect of the corresponding optical devices in the optical component area.
[0039] To achieve the above objectives, the technical solutions provided by the embodiments of the present invention are as follows, in detail... Figures 1 to 22 The technical solutions provided in the embodiments of the present invention will be described in detail.
[0040] refer to Figure 1 The diagram shown is a structural schematic of a display panel provided in an embodiment of the present invention. The display panel provided in this embodiment includes:
[0041] Multiple pixels, including a first pixel and a second pixel, wherein the first pixel includes a first light-emitting device 110 and a first pixel circuit 120 connected to each other, and the second pixel includes a second light-emitting device 210 and a second pixel circuit 220 connected to each other.
[0042] The display area includes an optical component area 101 and a conventional display area 102. The first light-emitting device 110 is located in the optical component area 101, and the second light-emitting device 210 is located in the conventional display area 102. The light-emitting device density in the optical component area 101 is less than the light-emitting device density in the conventional display area 102.
[0043] At least one transparent conductive layer is provided in the optical component region 101. The transparent conductive layer 300 includes a pair of first slits 310 and second slits 320, a connecting wire 330 located between the pair of first slits 310 and second slits 320, and an auxiliary layer 340 located outside the pair of first slits 310 and second slits 320.
[0044] like Figure 1As can be seen, in the embodiment of the present invention, the transparent conductive layer 300 corresponding to the optical component region 101 is slit by making a slit in the transparent conductive layer 300 to obtain a pair of first slits 310 and second slits 320, and a connecting wire 330 located between the pair of first slits 310 and second slits 320 can be obtained; and after making a slit in the transparent conductive layer 300 corresponding to the optical component region 101, the outer part of the overall structure of the pair of first slits 310 and second slits 320 and the connecting wire 330 is a transparent auxiliary layer 340.
[0045] In one embodiment of the present invention, the transparent conductive layer 300 can be slit multiple times at the optical component area 101 to obtain multiple connecting wires, thereby meeting the needs of more signal transmission. Specifically, the transparent conductive layer provided in this embodiment includes multiple first slits 310 and second slits 320, connecting wires 330 located between pairs of first slits 310 and second slits 320, and an auxiliary layer 340 located outside the pairs of first slits 310 and second slits 320 (i.e., the transparent conductive layer includes an auxiliary layer in addition to the first slits, second slits, and connecting wires, wherein the auxiliary layer and the connecting wires can be formed in the same layer, with the same material, and using the same process). When the transparent conductive layer provided in this embodiment includes multiple connecting wires, the slits between two adjacent connecting wires can be two independent slits, and the slits between two adjacent connecting wires can also be reused (i.e., the slit serves as both the slit for one of the two adjacent connecting wires and the slit for the other of the two adjacent connecting wires). The present invention does not impose specific limitations on this.
[0046] It is understood that the display panel provided in this embodiment of the invention includes an optical component area and a conventional display area, and both the optical component area and the conventional display area include light-emitting devices, resulting in a larger display area and meeting the trend of full-screen display. Furthermore, in the optical component area, the transparent conductive layer includes a pair of first and second slits, connecting wires located between the pair of first and second slits, and an auxiliary layer located outside the pair of first and second slits. While achieving signal transmission through the connecting wires, the design of retaining the auxiliary layer by slitting the transparent conductive layer also ensures high integrity of the transparent conductive layer in the optical component area, resulting in high light transmission uniformity of the transparent conductive layer in the optical component area. This improves the light transmission uniformity of the light-transmitting area in the optical component area, thereby improving the image acquisition effect of the corresponding optical devices in the optical component area.
[0047] Optionally, when the display panel provided in the embodiments of the present invention includes multiple transparent conductive layers, in a direction perpendicular to the plane of the display panel, at least one first slit and / or second slit of the transparent conductive layer overlaps with an auxiliary layer of at least one of the remaining transparent conductive layers; that is, when the display panel provided in the embodiments of the present invention includes multiple transparent conductive layers, an insulating isolation layer is provided between two adjacent transparent conductive layers, wherein in a direction perpendicular to the plane of the display panel (i.e., the stacking direction of the multiple transparent conductive layers), at least one first slit of the transparent conductive layer overlaps with an auxiliary layer of at least one of the remaining transparent conductive layers, or at least one second slit of the transparent conductive layer overlaps with an auxiliary layer of at least one of the remaining transparent conductive layers, or both the first slit and the second slit of the at least one transparent conductive layer overlap with an auxiliary layer of at least one of the remaining transparent conductive layers. Specifically, as shown below... Figure 2 The diagram shown is a structural schematic of another display panel provided in an embodiment of the present invention. Figure 2 Taking a display panel including a first transparent conductive layer 3010 and a second transparent conductive layer 3020 as an example, an insulating isolation layer 3030 is provided between the first transparent conductive layer 3010 and the second transparent conductive layer 3020. The first transparent conductive layer 3010 and the second transparent conductive layer 3020 each include a pair of first slits 310 and second slits 320, and a connecting wire 330 is provided between the pair of first slits 310 and second slits 320. The first slits 310 and second slits 320 of the first transparent conductive layer 3010 overlap with the auxiliary layer 340 of the second transparent conductive layer 3020, and the first slits 310 and second slits 320 of the second transparent conductive layer 3020 overlap with the auxiliary layer 340 of the first transparent conductive layer 3010.
[0048] Understandably, by having different transparent conductive layers overlap or even cover the slits they contain, the thickness of the transparent conductive layer at each slit in the direction perpendicular to the plane of the display panel is basically the same, thus avoiding a situation where the thickness of the transparent conductive layer corresponding to different slits differs too much and affects the uniformity of light transmission.
[0049] It should be noted that the optical component area provided in the embodiments of the present invention can be equipped with optical components such as cameras. The present invention does not impose specific limitations on this, and specific design is required based on actual applications. Figure 3 The schematic diagram of the display device shown includes a display panel 1 and an optical component 2. The display panel 1 includes an optical component area 101, and the optical component 2 is disposed on the non-light-emitting side of the display panel 1, correspondingly located at the optical component area 101. Optionally, the optical component 2 can be a camera.
[0050] like Figure 1 As shown, the first light-emitting device 110 and the first pixel circuit 120 provided in this embodiment of the invention can both be disposed at the optical component area 101; and the second light-emitting device 210 and the second pixel circuit 220 provided in this embodiment of the invention are disposed at the conventional display area 102. Alternatively, the first light-emitting device provided in this embodiment of the invention can be disposed at the optical component area, while the first pixel circuit connected to the first light-emitting device can be disposed outside the optical component area, such as at the conventional display area; similarly, the second light-emitting device and the second pixel circuit are disposed at the conventional display area; see details below. Figure 4 The diagram shows another structural schematic of a display panel provided in an embodiment of the present invention. The display panel includes a display area, which comprises an optical component area 101 and a conventional display area 102. A first light-emitting device 110 is located in the optical component area 101, while a first pixel circuit 120 connected to the first light-emitting device 110 is located outside the optical component area 101. This further increases the light-transmitting area of the optical component area, ensuring high image acquisition performance of the optical devices located in the optical component area. Optionally, the first pixel circuit connected to the first light-emitting device can be located between the conventional display area and the optical component area, or it can be located within the conventional display area; the present invention does not impose specific limitations on this. Optionally, the optical component area 101 includes multiple first light-emitting devices 110.
[0051] refer to Figure 5 The diagram shown is a schematic diagram of a slit structure provided in an embodiment of the present invention. In the transparent conductive layer provided in the embodiment of the present invention, at least one side edge of at least one of the first slit 310 and the second slit 320 is a wavy line.
[0052] It is understood that in at least one of the first and second slits provided in the embodiments of the present invention, at least one side edge is made into a wavy line, thereby improving the diffraction at the slit; in the first slit provided in the embodiments of the present invention, one or both side edges perpendicular to its extension direction are made into a wavy line; or, in the second slit provided in the embodiments of the present invention, one or both side edges perpendicular to its extension direction are made into a wavy line; or, in the first slit provided in the embodiments of the present invention, one or both side edges perpendicular to its extension direction are made into a wavy line, and in the second slit, one or both side edges perpendicular to its extension direction are made into a wavy line. Optionally, in the first and second slits provided in the embodiments of the present invention, and at the connecting wire between them, the side edges of the first and second slits facing the connecting wire are made into a wavy line, which can not only improve the diffraction of the slit at the side of the independent connecting wire, but also improve the diffraction of the slit between adjacent connecting wires.
[0053] In one embodiment of the present invention, the wavy line provided by the present invention can be a cosine line or a sine line, which is not specifically described in the present invention. The embodiments of the present invention can optimize the width of the slits and the width of the connecting wires to further improve the diffraction at the slits. Specifically, the slit width range of the first slit and / or the second slit provided in the embodiments of the present invention is 2μm-5μm, including the endpoint values. Similarly, the width range of the connecting wires provided in the embodiments of the present invention is 2μm-5μm, including the endpoint values.
[0054] The pixel driving circuit provided in this embodiment of the invention is electrically connected to the light-emitting device (i.e., the first pixel driving circuit is electrically connected to the first light-emitting device, and the second pixel driving circuit is electrically connected to the second light-emitting device). The pixel driving circuit may include multiple transistors and capacitors. All the transistors and capacitors work together to provide a driving current to the light-emitting device, thereby causing the light-emitting device to emit light in response to the driving current. The circuit composition of the first pixel driving circuit and the second pixel driving circuit provided in this embodiment of the invention may be the same. (Refer to...) Figure 6 The diagram shows a schematic of a pixel driving circuit according to an embodiment of the present invention. The pixel driving circuit includes: a driving transistor T0, a reset module 10, a data writing module 20, a light-emitting control module 30, and a storage module 40 electrically connected to the driving transistor T0. The reset module 10 transmits a first reference voltage Vref1 to the gate of the driving transistor T0 to reset the gate potential of the driving transistor T0; the data writing module 20 writes a data voltage Vdata to the first terminal of the driving transistor T0; the light-emitting control module 30 transmits the driving current generated by the driving transistor T0 to the light-emitting device 50, so that the light-emitting device 50 emits light in response to the driving current; and the storage module 40 maintains the voltage at the gate of the driving transistor T0. Optionally, the display panel provided in this embodiment of the present invention is an organic light-emitting display panel. Optionally, the transistors provided in this embodiment of the present invention are thin-film transistors.
[0055] like Figure 6As shown, the reset module 10 provided in this embodiment of the invention includes a reset transistor T1. The first terminal of the reset transistor T1 is connected to a first reference voltage Vref1, the gate of the reset transistor T1 is electrically connected to a first reset signal S1, and the second terminal of the reset transistor T1 is electrically connected to the gate of a driving transistor T0. The data writing module 20 includes a first data writing transistor T2 and a second data writing transistor T3. The gates of both the first data writing transistor T2 and the second data writing transistor T3 are electrically connected to a first scan signal S2. The first terminal of the first data writing transistor T2 is connected to a data voltage Vdata, and the second terminal of the first data writing transistor T2 is electrically connected to the first terminal of the driving transistor T0. The first terminal of the second data writing transistor T3 is electrically connected to the gate of the driving transistor T0, and the second terminal of the second data writing transistor T3 is electrically connected to the second terminal of the driving transistor T0. The light-emitting control module 30 includes a first light-emitting control transistor T4 and a second light-emitting control transistor T5. The gates of the control light-emitting transistor T4 and the second control light-emitting transistor T5 are both electrically connected to the second scan signal S3. The first terminal of the first control light-emitting transistor T4 is connected to a first voltage, and the second terminal of the first control light-emitting transistor T4 is electrically connected to the first terminal of the driving transistor T0. The first terminal of the second control light-emitting transistor T5 is electrically connected to the second terminal of the driving transistor T0, and the second terminal of the second control light-emitting transistor T5 is electrically connected to the first terminal of the light-emitting device 50. The second terminal of the light-emitting device 50 is connected to the second voltage V2. The storage module 40 includes a storage capacitor C. The first plate of the storage capacitor C is connected to the first voltage V1, and the second plate of the storage capacitor C is electrically connected to the gate of the driving transistor T0.
[0056] Combination Figure 6 and Figure 7 As shown, Figure 7 This invention provides a timing diagram for an embodiment of the present invention, wherein the embodiment is illustrated using an example where all transistors in the pixel circuit are P-type transistors (i.e., the transistor is turned on when the control signal connected to the gate of the transistor is low, and the transistor is turned off when the control signal is high). The operation of the pixel driving circuit provided in this embodiment includes a reset stage M1, a data writing stage M2, and a light emission stage M3 performed sequentially.
[0057] During the reset phase M1, the reset transistor T1 is turned on and transmits the first reference voltage Vref1 to the gate of the driving transistor T0. At this time, the transistors of the data writing module 20 and the control light-emitting module 30 are both turned off; wherein the first reference voltage Vref1 is the voltage that can control the driving transistor T0 to turn on.
[0058] During the data writing phase M2, both the control transistor and the reset transistor T1 of the light-emitting module 30 are turned off. Meanwhile, the first data writing transistor T2 and the second data writing transistor T3 are turned on. The first data writing transistor T2 outputs the data voltage Vdata to the first terminal of the driving transistor T0, while the second data writing transistor T3 connects the gate and the second terminal of the driving transistor T0.
[0059] During the light-emitting stage M3, both the transistors in the data writing module 20 and the reset transistor T1 are turned off. Meanwhile, the first control light-emitting transistor T4 and the second control light-emitting transistor T5 are turned on to form a path connecting the first voltage V1, the first control light-emitting transistor T4, the driving transistor T0, the second control light-emitting transistor T5, the light-emitting device 50, and the second voltage V2. The driving current generated by the driving transistor T0 is transmitted to the light-emitting device 50, and the light-emitting device 50 emits light in response to the driving current.
[0060] Optionally, the pixel circuit provided in this embodiment of the invention may further include a black state holding module, as shown in the reference. Figure 8 The diagram shown illustrates another pixel circuit structure provided in an embodiment of the present invention. The pixel circuit further includes a black-state holding module 60 electrically connected to the light-emitting device 50. The black-state holding module 60 transmits the second reference voltage Vref2 to the light-emitting device 50 to control the light-emitting device 50 to maintain a black-state off state outside the light-emitting phase. Specifically... Figure 8 As shown, the black state holding module 60 provided in this embodiment of the invention includes a black state holding transistor T6. The gate of the black state holding transistor T6 is electrically connected to a second reset signal S4. The first terminal of the black state holding transistor T6 is connected to a second reference signal Vref2, and the second terminal of the black state holding transistor T6 is electrically connected to the first terminal of the light-emitting device 50. The invention... Figure 8 The pixel circuit shown includes and Figure 6 The pixel circuit shown has the same reset phase M1, data writing phase M2, and light emission phase M3, as shown in the figure. Figure 9 The illustrated timing diagram of another embodiment of the present invention shows that, during the reset phase M1 and the data writing phase M2, the black-state holding transistor T6 is controlled to be turned on by the second reset signal S4. The black-state holding transistor T6 then transmits the second reference voltage Vref2 to the first terminal of the light-emitting device 50 to control the light-emitting device 50 to remain in a black-state off state, preventing the black state from not being dimmed during the reset and data writing phases. During the light-emitting phase M3, the black-state holding transistor T6 is controlled to be turned off by the second reset signal S4, ensuring the normal light emission of the light-emitting device 50.
[0061] It should be noted that the embodiments of the present invention do not impose specific limitations on the specific circuitry of the pixel circuit described above, and other circuit connection structures may be used in other embodiments of the present invention. Furthermore, the driving transistor, reset transistor, data writing transistor, control light-emitting transistor, and black-state holding transistor provided in the embodiments of the present invention can all be P-type thin-film transistors, or the driving transistor, reset transistor, data writing transistor, control light-emitting transistor, and black-state holding transistor can all be N-type thin-film transistors; the first voltage provided in the embodiments of the present invention is the voltage provided at the anode voltage terminal, and the second voltage is the voltage provided at the cathode voltage terminal; and the light-emitting device can be a light-emitting diode, etc., and the present invention does not impose specific limitations in these aspects.
[0062] It is understandable that the present invention provides Figure 6 and Figure 8 The pixel circuits shown are merely two examples of all pixel circuits applicable to this invention. In other embodiments of this invention, the pixel circuit can also be a circuit structure connecting multiple transistors, capacitors, and other devices. Furthermore, in order to provide the pixel circuit with a scanning signal (the scanning signal includes, for example...), Figure 6 and Figure 8 The first scan signal and the second scan signal shown), and the reset signal (the reset signal includes, as shown) Figure 6 and Figure 8 The first reset signal shown, and Figure 8 The second reset signal shown), data signal (data signal as shown) Figure 6 and Figure 8 The data voltage shown), reference voltage (data signal such as) Figure 6 and Figure 8 The first reference voltage and the second reference voltage shown) and the power supply voltage (power supply voltage as shown) Figure 6 and Figure 8 The first voltage shown in the figure, etc., the display panel correspondingly includes scan signal lines, reset signal lines, data lines, reference voltage lines and power supply voltage lines located outside the optical component area.
[0063] In the optical component area provided in this embodiment of the invention, when the first pixel circuit is located in the optical component area (TFT built-in), since corresponding signals need to be provided to the first pixel circuit through scan signal lines, reset signal lines, data lines, reference voltage lines, and power supply voltage lines, this embodiment of the invention can fabricate adapter lines in the optical component area to electrically connect with lines outside the optical component area; wherein the adapter lines can be made of a transparent conductive layer. That is, the first pixel circuit provided in this embodiment of the invention is located in the optical component area, and the connecting wires include at least one of scan signal adapter lines, data adapter lines, reset signal adapter lines, reference voltage adapter lines, and power supply voltage adapter lines connected to the first pixel circuit. Specifically, the scan signal adapter line is electrically connected to the scan signal line, the data adapter line is electrically connected to the data line, the reset signal adapter line is electrically connected to the reset signal line, the reference voltage adapter line is electrically connected to the reference voltage line, and the power supply voltage adapter line is electrically connected to the power supply voltage line. See details. Figure 10 The diagram shown is a structural schematic of another display panel provided in an embodiment of the present invention, wherein the display panel provided in this embodiment of the present invention includes:
[0064] Supporting substrate 710.
[0065] A transistor array layer 720 is located on one side surface of the carrier substrate 710. The transistor array layer 720 includes a semiconductor layer 721 on one side surface of the carrier substrate 710; a first insulating layer 722 on the side of the semiconductor layer 721 facing away from the carrier substrate 710; a gate metal layer 723 on the side of the first insulating layer 722 facing away from the carrier substrate 710; a second insulating layer 724 on the side of the gate metal layer 723 facing away from the carrier substrate 710; a capacitor metal layer 725 on the side of the second insulating layer 724 facing away from the carrier substrate 710; a third insulating layer 726 on the side of the capacitor metal layer 725 facing away from the carrier substrate 710; and a source / drain metal layer 727 on the side of the third insulating layer 726 facing away from the carrier substrate 710. The active region of the semiconductor layer 721, the gate of the gate metal layer 723, and the source / drain of the source / drain metal layer 727 constitute a transistor. The transistor array layer 720 includes a first pixel circuit and a second pixel circuit. The first pixel circuit is located in the optical component area 101 and includes a plurality of transistors 7201.
[0066] The passivation layer 730 is located on the side of the transistor array layer 720 facing away from the carrier substrate 710.
[0067] The transparent structural layer located on the side of the passivation layer 730 away from the carrier substrate 710 includes at least one transparent conductive layer 300. When the transparent structural layer includes a stack of multiple transparent conductive layers, adjacent transparent conductive layers are insulated and isolated from each other by an isolation layer.
[0068] A planarization layer 750 is located on the side of the transparent structural layer opposite to the carrier substrate 710.
[0069] Additionally, a pixel definition layer 760 is located on the side of the planarization layer 750 facing away from the carrier substrate 710. The pixel definition layer 760 includes multiple openings, and light-emitting devices are defined at the openings of the pixel definition layer 760. The light-emitting device provided in this embodiment may include an anode 771, a light-emitting layer 772, and a cathode 773 stacked sequentially. Due to the presence of the transparent conductive layer 300, the electrical connection between the anode 771 and the transistor 7201 of the first pixel circuit via a via can be achieved by: a terminal 3004 connected to the via of the anode 771 is disposed on the same layer as the transparent conductive layer 300, and the transistor 7201 of the first pixel circuit is electrically connected to the terminal 3004 via a via, thus realizing the electrical connection between the anode 771 and the transistor 7201 of the first pixel circuit. The terminal may be part of the transparent conductive layer. Optionally, the transparent conductive layer may also be perforated and insulated on the via path connecting the anode and the transistor to achieve the electrical connection between the anode and the transistor. Optionally, under the same test conditions, the transparent conductive layer 300 has a higher transmittance to natural light than the anode 771.
[0070] Optionally, the display panel provided in this embodiment of the invention further includes a buffer layer 780 located between the semiconductor layer 720 and the carrier substrate 710. The buffer layer 780 can prevent impurities from entering the semiconductor layer 720 during the fabrication of the semiconductor layer.
[0071] like Figure 10As shown, the transparent conductive layer 300 provided in this embodiment of the invention has connecting wires, and the connecting wires include adapter wires 3001. Adapter wires 3001 include at least one of the following: scan signal adapter wires, data adapter wires, reset signal adapter wires, reference voltage adapter wires, and power supply voltage adapter wires connected to the first pixel circuit. When the display panel provided in this embodiment of the invention includes a transparent conductive layer, the types of lines including scan signal adapter wires, data adapter wires, reset signal adapter wires, reference voltage adapter wires, and power supply voltage adapter wires included in the adapter wires can all be located in the same transparent conductive layer. Optionally, at the point where two connecting wires overlap, one of them can be selected, for example, connected via a bridge in the light-emitting area of the device. Furthermore, when the display panel provided in this embodiment of the invention includes multiple transparent conductive layers, the types of lines including scan signal adapter wires, data adapter wires, reset signal adapter wires, reference voltage adapter wires, and power supply voltage adapter wires included in the adapter wires can be selected to be located in different transparent conductive layers according to actual applications; or the above types of adapter wires can be grouped so that some are located in the same transparent conductive layer, while the remaining parts are located in other transparent conductive layers. This invention does not impose specific limitations on this. The gate metal layer 723, capacitor metal layer 725, and source / drain metal layer 727 provided in this embodiment of the invention are formed with signal lines, including at least one of scan signal lines, reset signal lines, data lines, reference voltage lines, and power supply voltage lines. When the adapter line 3001 of the optical component region 101 provided in this embodiment of the invention is connected to a signal line outside the optical component region 101, such as when the adapter line 3001 is connected to a signal line 7251 of the capacitor metal layer 725, it can be connected outside the optical component region 101 through a via.
[0072] In the optical component area provided in this embodiment of the invention, when the first pixel circuit is located outside the optical component area (TFT external), since the scan signal line, reset signal line, data line, reference voltage line, and power supply voltage line are all located outside the optical component area, the first pixel circuit can be directly connected to these lines outside the optical component area. Furthermore, since the first light-emitting device is located in the optical component area and is electrically connected to the first pixel circuit, this embodiment of the invention can fabricate an electrode adapter wire electrically connected to the first light-emitting device in the optical component area, and achieve electrical connection by connecting to the first pixel circuit through the electrode adapter wire. The electrode adapter wire can be formed by scribing a transparent conductive layer. That is, the first pixel circuit provided in this embodiment of the invention is located outside the optical component area, and the connecting wire includes an electrode adapter wire electrically connected to the first light-emitting device, and the electrode adapter wire is electrically connected to the first pixel circuit. See details. Figure 11 The diagram shown is a structural schematic of another display panel provided in an embodiment of the present invention, wherein the display panel provided in this embodiment of the present invention includes:
[0073] Supporting substrate 710.
[0074] A buffer layer 780 is located on one side surface of the carrier substrate 710;
[0075] A transistor array layer 720 is located on the surface of the buffer layer 780 facing away from the carrier substrate 710. The transistor array layer 720 includes a semiconductor layer 721 on the surface of the carrier substrate 710; a first insulating layer 722 on the surface of the semiconductor layer 721 facing away from the carrier substrate 710; a gate metal layer 723 on the surface of the first insulating layer 722 facing away from the carrier substrate 710; a second insulating layer 724 on the surface of the gate metal layer 723 facing away from the carrier substrate 710; a capacitor metal layer 725 on the surface of the second insulating layer 724 facing away from the carrier substrate 710; a third insulating layer 726 on the surface of the capacitor metal layer 725 facing away from the carrier substrate 710; and a source / drain metal layer 727 on the surface of the third insulating layer 726 facing away from the carrier substrate 710. The active region of the semiconductor layer 721, the gate of the gate metal layer 723, and the source / drain of the source / drain metal layer 727 constitute a transistor. The transistor array layer 720 includes a first pixel circuit and a second pixel circuit. The first pixel circuit is located outside the optical component area 101 and includes a plurality of transistors 7202.
[0076] The passivation layer 730 is located on the side of the transistor array layer 720 facing away from the carrier substrate 710.
[0077] The transparent structural layer located on the side of the passivation layer 730 away from the carrier substrate 710 includes at least one transparent conductive layer 300. When the transparent structural layer includes a stack of multiple transparent conductive layers, adjacent transparent conductive layers are insulated and isolated from each other by an isolation layer.
[0078] A planarization layer 750 is located on the side of the transparent structural layer opposite to the carrier substrate 710.
[0079] Additionally, a pixel definition layer 760 is located on the side of the planarization layer 750 facing away from the carrier substrate 710. The pixel definition layer 760 includes multiple openings, and light-emitting devices are defined at the openings of the pixel definition layer 760. The light-emitting device provided in this embodiment of the invention may include an anode 771, a light-emitting layer 772, and a cathode 773 stacked sequentially. Optionally, under the same test conditions, the transmittance of the transparent conductive layer 300 to natural light is greater than that of the anode 771.
[0080] like Figure 11As shown, the transparent conductive layer 300 provided in this embodiment of the invention has connecting wires, including an electrode adapter wire 3002. The electrode adapter wire 3002 is electrically connected to the anode 771 of the first light-emitting device in the optical component region 101 through a via. Furthermore, at least one of the gate metal layer 723, capacitor metal layer 725, and source / drain metal layer 727 provided in this embodiment of the invention has an external connection formed to a transistor 7202 of the first pixel circuit, such as the external connection 7252 of the capacitor metal layer 725. Thus, the electrode adapter wire 3002 can be electrically connected to the external connection 7252 outside the optical component region 101 through a via, thereby realizing the electrical connection between the first pixel circuit and the first light-emitting device.
[0081] Optionally, when the first pixel circuit is located outside the optical component area, embodiments of the present invention can also make full use of the transparent conductive layer. That is, outside the optical component area, the transparent conductive layer is used to form an auxiliary signal line that is directly electrically connected to the electrode adapter line, and then the auxiliary signal line is electrically connected to the first pixel circuit to realize the electrical connection structure between the first pixel circuit and the first light-emitting device. Figure 12 The diagram shown is a structural schematic of another display panel provided in an embodiment of the present invention, wherein... Figure 12 The display panel shown is Figure 11 The difference in the display panel shown is that it may not include external wiring; and outside the optical component area 101, the transparent conductive layer 300 also includes multiple auxiliary signal lines 3003, through which the first pixel circuit and the electrode adapter line 3002 are electrically connected. Optionally, the electrically connected auxiliary signal lines 3003 and the electrode adapter line 3002 are disposed on the same layer. Specifically, the auxiliary signal lines 3003 and the first pixel circuit can be electrically connected by extending the electrode adapter line 3002 outward from the optical component area 101.
[0082] It should be noted that the above-mentioned invention... Figures 10 to 12 The embodiments are all described using a top-gate transistor as an example; the transistor can also be a bottom-gate transistor, that is, the active region of the transistor is located above the gate, while the source and drain are located on the side of the active region away from the gate. This invention will not elaborate further on this.
[0083] In one embodiment of the present invention, the light-emitting device of the display panel provided by the present invention includes an anode, a light-emitting layer, and a cathode stacked sequentially. All display panels may include a single cathode layer covering an entire surface, and the cathodes of the light-emitting devices are all corresponding portions of this cathode layer. Alternatively, the cathodes of different light-emitting devices may be independent electrode structures, and each independent cathode is electrically connected to a cathode signal line. The present invention does not impose specific limitations on this. When the cathodes of different first light-emitting devices are independent of each other, the independent cathodes may each be electrically connected to the cathode signal line via cathode adapter wires, or partially or all of the cathodes may be connected before being electrically connected to the cathode signal line. (Reference) Figure 13 The diagram shows a schematic of a cathode connection structure for an optical component area according to an embodiment of the present invention. The first light-emitting device includes an anode (not shown), a light-emitting layer (not shown), and a cathode 7731 stacked sequentially, with gaps between the cathodes 7731 of different first light-emitting devices. At least one cathode 7731 of the first light-emitting device is electrically connected to a cathode signal line PVEE via its respective cathode adapter wire 7732. In this embodiment, all light-emitting devices outside the optical component area 101 share the same cathode layer 7733, which is electrically connected to the cathode signal line PVEE. The cathode 7731 of the first light-emitting device can be electrically connected to the cathode layer 7733 outside the optical component area 101 via the cathode adapter wire 7732, achieving the purpose of electrically connecting the cathode 7731 of the first light-emitting device to the cathode signal line PVEE. Specifically... Figure 14 As shown, the cathode adapter wire 7732 provided in this embodiment of the invention can be located in the transparent conductive layer 300 (i.e., the connecting wire includes the cathode adapter wire). The cathode adapter wire 7732 is electrically connected to the cathode 7731 of the first light-emitting device through a via, and simultaneously electrically connected to the cathode layer 7733 through a via, thereby connecting the cathode of the first light-emitting device to the cathode signal line. It should be noted that... Figure 14 The example provided is only based on the TFT built-in solution. The cathode adapter solution provided in this embodiment is also applicable to the TFT external solution.
[0084] Optional, see reference Figure 15The diagram shows another cathode connection structure of an optical component area provided in an embodiment of the present invention. The first light-emitting device includes an anode (not shown), a light-emitting layer (not shown), and a cathode 7731 stacked sequentially, with gaps between the cathodes 7731 of different first light-emitting devices. At least a plurality of cathodes 7731 of the first light-emitting devices are electrically connected in the optical component area 101 via connecting lines 7735, and subsequently, the multiple cathodes 7731 connected together are electrically connected to the cathode signal line PVEE via lead-out lines 7736. In this embodiment of the present invention, all light-emitting devices outside the optical component area 101 reuse the same cathode layer 7733, and the cathode layer 7733 is electrically connected to the cathode signal line PVEE. The cathode 7731 of the first light-emitting device provided in this embodiment of the present invention can be electrically connected to the cathode layer 7733 outside the optical component area 101 via lead-out lines 7736, achieving the purpose of electrically connecting the cathode 7731 of the first light-emitting device to the cathode signal line PVEE. Specifically, as shown... Figure 16 As shown, the connecting line 7735 and the lead line 7736 provided in this embodiment of the invention can both be located in the transparent conductive layer 300 (i.e., the connecting wires include connecting lines and lead lines). The connecting line 7735 achieves electrical connection between the cathodes 7731 of different first light-emitting devices through vias. The lead line 7736 achieves electrical connection to the cathode 7731 of a first light-emitting device through a via. Simultaneously, the lead line 7736 achieves electrical connection to the cathode layer 7733 through a via, thereby connecting the cathode of the first light-emitting device to the cathode signal line. It should be noted that... Figure 16 The example provided is only based on the TFT built-in solution. The cathode adapter solution provided in this embodiment is also applicable to the TFT external solution.
[0085] refer to Figure 17 The diagram shown illustrates the structure of another display panel according to an embodiment of the present invention. The display panel includes a fixed voltage signal line 790, wherein the auxiliary layer 340 is electrically connected to the fixed voltage signal line 790. The fixed voltage signal line 790 is located outside the optical component area 101, and the auxiliary layer 340 can be electrically connected to the fixed voltage signal line 790 outside the optical component area 101 via a via.
[0086] Understandably, in this embodiment of the invention, the auxiliary layer is electrically connected to the fixed voltage signal line, thereby reducing the impedance of the fixed voltage signal line and improving the problem of large voltage drop on the fixed voltage signal line. Optionally, the fixed voltage signal line provided in this embodiment of the invention includes one of a reference voltage signal line and a power supply voltage signal line. Figure 18As shown, the fixed voltage signal line provided in this embodiment of the invention can be a power supply voltage signal line PVDD, wherein the auxiliary layer 340 can be electrically connected to the power supply voltage signal line PVDD outside the optical component area 101 through a via. Figure 19 As shown, the fixed voltage signal line provided in this embodiment of the invention can be a reference voltage signal line VREF, wherein the auxiliary layer 340 can be electrically connected to the reference voltage signal line VREF through a via outside the optical component area 101. When the first pixel circuit provided in this embodiment of the invention is located in the optical component area, the connecting wires included in the transparent conductive layer include a reference voltage adapter wire and a power supply voltage adapter wire, wherein the auxiliary layer can be connected to either the reference voltage adapter wire or the power supply voltage adapter wire to achieve the purpose of electrically connecting the auxiliary layer to the fixed voltage signal line.
[0087] Optionally, in one embodiment of the present invention, the auxiliary layer provided by the present invention is floating, that is, the auxiliary layer does not need to be connected to any lines. For example... Figure 20 As shown, with Figure 18 and Figure 19 In comparison, Figure 20 The auxiliary layer 340 shown is floating and does not require connection to any signal lines. This avoids interference to other overlapping lines when the auxiliary layer receives signals, ensuring minimal interference to the signal lines on the display panel.
[0088] refer to Figure 21 The diagram shown is a structural schematic of another display panel provided in an embodiment of the present invention. The plurality of pixels provided in this embodiment further includes a third pixel, which includes a third light-emitting device 310 and a third pixel circuit 320 connected to each other. The display area also includes a transition display area 103 located between the conventional display area 102 and the optical component area 110. The third light-emitting device 310 is located in the transition display area 103. The light-emitting device density of the transition display area 103 is greater than or equal to the light-emitting device density of the optical component area 101, and the light-emitting device density of the transition display area 103 is less than the light-emitting device density of the conventional display area 102.
[0089] It is understood that the display area provided in this embodiment of the invention, by setting a transition display area, can optimize the display effect between the conventional display area and the optical component area, thereby improving the user's visual experience. Optionally, when the first pixel circuit is located outside the optical component area, the first pixel circuit is located in the transition display area.
[0090] In any of the above embodiments provided by the present invention, the transparent conductive layer includes at least one of an ITO layer, an IZO layer, and a silver nanowire layer. That is, the transparent conductive layer provided by the embodiments of the present invention can be an ITO layer; or the transparent conductive layer can be an IZO layer; or the transparent conductive layer can be a silver nanowire layer; or the transparent conductive layer can be a stacked structure, and each stacked layer can be an ITO layer, an IZO layer, or a silver nanowire layer. The present invention does not impose specific limitations on this.
[0091] In any of the above embodiments of the present invention, when the first pixel circuit provided by the present invention is located in the optical component area, all the first light-emitting devices and the pixel units connected to the first pixel circuit can be arranged in a regular array or in an irregular arrangement. The present invention does not impose specific restrictions on this, and specific design is required according to the actual application.
[0092] Accordingly, based on the same inventive concept, the present invention also provides a display device, which includes the flexible display panel provided in any of the above embodiments.
[0093] refer to Figure 22 The diagram shown is a structural schematic of another display device provided in an embodiment of the present invention, wherein the display device 1000 provided in the embodiment of the present invention can be a mobile terminal device.
[0094] Optionally, the display device provided by the present invention can also be an electronic display device such as a computer or a wearable display device, and the present invention does not impose specific limitations on it.
[0095] This invention provides a display panel and a display device. The display area of the display panel includes an optical component area and a conventional display area, both of which include light-emitting devices, resulting in a larger display area and meeting the trend of full-screen display. Furthermore, in the optical component area, the transparent conductive layer includes a pair of first and second slits, connecting wires located between the pair of first and second slits, and an auxiliary layer located outside the pair of first and second slits. While achieving signal transmission through the connecting wires, the design of retaining the auxiliary layer by slitting the transparent conductive layer ensures high integrity of the transparent conductive layer in the optical component area, resulting in high light transmission uniformity of the transparent conductive layer in the optical component area. This improves the light transmission uniformity of the light-transmitting area in the optical component area, thereby improving the image acquisition effect of the corresponding optical devices in the optical component area.
[0096] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A display panel, characterized in that, include: The display area includes an optical component area and a conventional display area. A first light-emitting device is located in the optical component area, and a second light-emitting device is located in the conventional display area. The first light-emitting device is electrically connected to a first pixel circuit, and the second light-emitting device is electrically connected to a second pixel circuit. A transparent conductive layer is provided in the optical component area, the transparent conductive layer including connecting wires, the connecting wires including electrode adapter wires electrically connected to the anode of the first light-emitting device; The metal external wiring is electrically connected to the electrode adapter wire and the first pixel circuit outside the optical component area.
2. The display panel according to claim 1, characterized in that, The transparent conductive layer includes a pair of first and second slits, a connecting wire located between the pair of first and second slits, and an auxiliary layer located outside the pair of first and second slits.
3. The display panel according to claim 2, characterized in that, The display panel includes a plurality of the transparent conductive layers. In a direction perpendicular to the plane of the display panel, at least one of the transparent conductive layers has a first slit and / or a second slit overlapping with an auxiliary layer of at least one of the remaining transparent conductive layers.
4. The display panel according to claim 2, characterized in that, At least one side edge of at least one of the first and second slits is a wavy line.
5. The display panel according to claim 4, characterized in that, The wavy line is either cosine or sine.
6. The display panel according to claim 2, characterized in that, The slit width of the first slit and / or the second slit ranges from 2μm to 5μm, including the endpoint values.
7. The display panel according to claim 1, characterized in that, The width of the connecting wire ranges from 2μm to 5μm, including the endpoint values.
8. The display panel according to claim 1, characterized in that, The first light-emitting device includes an anode, a light-emitting layer, and a cathode stacked sequentially, wherein there are gaps between the cathodes of different first light-emitting devices; In this configuration, at least one cathode of the first light-emitting device is electrically connected to the cathode signal line via its respective cathode adapter wire, or at least a plurality of cathodes of the first light-emitting devices are electrically connected to the cathode signal line via lead wires connected in the optical component area.
9. The display panel according to claim 2, characterized in that, The display panel includes fixed voltage signal lines, wherein the auxiliary layer is electrically connected to the fixed voltage signal lines.
10. The display panel according to claim 9, characterized in that, The fixed voltage signal line includes either a reference voltage signal line or a power supply voltage signal line.
11. The display panel according to claim 2, characterized in that, The auxiliary layer is floating.
12. The display panel according to any one of claims 1-11, characterized in that, Also includes: The third light-emitting device is electrically connected to the third pixel circuit. The display area also includes a transition display area located between the conventional display area and the optical component area, and the third light-emitting device is located in the transition display area.
13. The display panel according to claim 12, characterized in that, The first pixel circuit is located in the transition display area.
14. The display panel according to claim 1, characterized in that, The transparent conductive layer includes at least one of an ITO layer, an IZO layer, and a silver nanowire layer.
15. A display device, characterized in that, The display device includes the display panel as described in any one of claims 1-14.