Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a display area and a touch structure covering the display area. The touch structure on the light-emitting side of the light-emitting element is set to a touch layer formed by repeatedly overlapping multiple layers of transparent conductive layers and metal layers. The touch layer of the display panel has a transmittance of >85% for light emitted from the display area. The touch structure can not only reduce the reflection of external light, but also improve the light extraction efficiency of the display panel. Since the shading structure and insulating layer above the touch layer are removed, the number of film layers prepared for the touch structure of the display panel is reduced and the difficulty of the preparation process is lowered, the thickness of the display panel is thinned, and the transmittance of the touch structure ensures the display effect of the display panel.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the advancement of the information age, touch screen technology has gradually replaced key technology and become the mainstream technology for mobile terminals.

[0003] For display panels in the prior art, it is usually necessary to add a light shielding layer above the touch electrodes of the display panel to prevent the touch electrodes from reflecting light. This structural design increases the difficulty of the film layer preparation process of the display panel and the thickness of the display panel, affecting the display effect. Summary of the Invention

[0004] The present invention provides a display panel and a display device. By arranging the touch electrodes of the display panel into a translucent conductive structure with multiple layers of transparent conductive layers and metal layers repeatedly overlapping, the structure can not only reduce the reflection of external light, but also improve the light extraction efficiency of the display panel, reduce the difficulty of the film layer preparation process of the display panel, and ensure the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present invention provides a display panel, including:

[0006] Display area;

[0007] A touch structure covering the display area includes a touch layer formed by repeatedly overlapping multiple transparent conductive layers and metal layers, and the touch layer has a transmittance of >85% for light emitted from the display area.

[0008] In a second aspect, an embodiment of the present invention provides a display device, comprising the display panel provided in the first aspect.

[0009] The display panel provided by the embodiment of the present invention, by setting the touch structure on the light-emitting side of the light-emitting element to a touch layer formed by repeated overlapping of multiple layers of transparent conductive layers and metal layers, the touch layer of the display panel has a transmittance of >85% for the light emitted from the display area. The touch structure can not only reduce the reflection of external light, but also improve the light extraction efficiency of the display panel. Since the shading structure and insulating layer above the touch layer are removed, the number of film layers prepared for the touch structure of the display panel is reduced and the difficulty of the preparation process is lowered, the thickness of the display panel is thinned, and the transmittance of the touch structure ensures the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of a display panel provided by the prior art;

[0011] Figure 2is a schematic diagram of the surface structure of a display panel provided by an embodiment of the present invention;

[0012] Figure 3 is a schematic diagram of the surface structure of another display panel provided by an embodiment of the present invention;

[0013] Figure 4 yes Figure 2 A schematic cross-sectional view of a display panel along the AA' direction;

[0014] Figure 5 yes Figure 2 A schematic cross-sectional view of another display panel in the middle BB direction;

[0015] Figure 6 Schematic diagram of a film structure of a touch structure provided by an embodiment of the present invention;

[0016] Figure 7 yes Figure 2 A schematic cross-sectional view of another display panel along the AA' direction;

[0017] Figure 8 yes Figure 2 A schematic cross-sectional view of another display panel along the AA' direction;

[0018] Figure 9 is a schematic diagram of a film structure of another touch structure provided by an embodiment of the present invention;

[0019] Figure 10 is a schematic diagram of a film structure of another touch structure provided by an embodiment of the present invention;

[0020] Figure 11 is a schematic structural diagram of a display device provided by an embodiment of the present invention;

[0021] Figure 12 yes Figure 11 A schematic diagram of a film structure of the first touch line along the CC' direction;

[0022] Figure 13 yes Figure 11 Schematic diagram of a film layer structure along the DD' direction of the second touch line. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0024] Figure 1This is a schematic diagram of the structure of a display device provided by the prior art. Figure 1 As shown, a display panel 100 in the prior art includes a display area 10 and a touch structure 11 covering the display area 10. The touch structure 11 includes multiple touch electrodes 111 and a shading structure 112 located on the side of the touch electrode 111 away from the display area 10. The display area 10 includes multiple light-emitting elements 101. To avoid short circuit caused by contact between the shading structure 112 and the touch electrode 111, the touch structure 11 also includes an insulating layer 113 located between the touch electrode 111 and the shading structure 112. The touch electrode 111 is a metal conductive material. Due to the presence of the shading structure 112 and the insulating layer 113, on the one hand, at least two layers of the film preparation process of the display panel touch structure are added, thereby increasing the thickness of the display panel; on the other hand, the shading structure 112 blocks the light output of the light-emitting element 101, thereby affecting the display effect of the display panel.

[0025] Based on the above technical problems, the inventors discovered that the touch electrodes of the display panel can be configured as a semi-transparent conductive structure with multiple layers of repeatedly overlapping transparent conductive layers and metal layers. This structure can meet the touch function while eliminating the need for a light-shielding structure and an insulating layer. Based on this, the inventors further developed the technical solution of the embodiments of the present invention. Specifically, the embodiments of the present invention provide a display panel comprising a display area; a touch structure covering the display area, the touch structure comprising a touch layer formed by repeatedly overlapping multiple layers of transparent conductive layers and metal layers, the touch layer having a transmittance of >85% for light emitted from the display area.

[0026] By adopting the above technical solution, a touch structure is provided including a touch layer formed by repeated overlapping of multiple transparent conductive layers and metal layers. The transmittance of the touch layer of the display panel to the light emitted from the display area is greater than 85%. The touch structure can not only reduce the reflection of external light, but also improve the light extraction efficiency of the display panel, reduce the number of film layers prepared for the touch structure of the display panel and reduce the difficulty of the preparation process, reduce the thickness of the display panel, and ensure the display effect of the display panel.

[0027] The above is the core concept of the present invention. The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] Figure 2 is a schematic diagram of the surface structure of a display panel provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the surface structure of another display panel provided by an embodiment of the present invention; Figure 4 yes Figure 2A schematic cross-sectional view of a display panel along the AA' direction; Figure 5 yes Figure 2 A schematic cross-sectional view of another display panel along the AA' direction; Figure 6 FIG. 1 is a schematic diagram of a film structure of a touch structure provided by an embodiment of the present invention. Figure 2-Figure 6 As shown, the display panel 200 provided by the embodiment of the present invention includes a display area 20 / AA and a touch structure 21 covering the display area. The touch structure 21 includes a touch layer 210 formed by repeatedly overlapping multiple layers of transparent conductive layers 211 and metal layers 212. The transmittance of the touch layer 210 to the light emitted from the display area 20 / AA is greater than 85%.

[0029] Specific, combined Figure 2-Figure 6 As shown, the display panel 200 provided in the embodiment of the present invention includes a display area 20 / AA and a touch structure 21 covering the display area. The display area 20 / AA is used for normal display of images. The display panel 200 includes a liquid crystal display (LCD), an organic light emitting diode display (OLED), a micro light emitting diode display (Micro LED), an active-matrix organic light emitting diode display (AMOLED), a quantum dot light emitting diode display (QLED), etc. The touch structure 21 covering the display area 20 / AA includes a multi-layer touch layer 210. The touch layer 210 is formed by repeated overlapping of a transparent conductive layer 211 and a metal layer 212. The touch layer 210 is used to implement a touch function. Touch can be implemented based on the mutual capacitance touch principle or the self-capacitive touch principle. The embodiment of the present invention is not limited to this. Figure 4 The touch structure 21 includes a touch layer 210. Figure 5The touch structure 21 is shown to include two touch layers 210, and more stacked touch layer 210 structures, which are not listed here one by one. The transparent conductive layer 211 can be made of transparent conductive materials such as indium tin oxide (ITO), indium gallium zinc oxide (IGZO), GZO, IZO (InZnO), AZO (AlZnO), etc., which can reduce the reflection of the touch layer 210 on the external light S0 and reduce the touch layer 210 from blocking the outgoing light S1 of the display area 20 / AA. The transmittance of the touch layer 210 on the outgoing light of the display area is >85%, which improves the light extraction efficiency of the display panel 200; the metal layer 212 can be made of at least one of Au, Ag, Cu, Ni, Pt, Pd, Al, Mo, W and Ti and other metal conductive materials to ensure the transmission of the touch signal of the touch layer 210. Since the metal layer 212 is set between the transparent conductive layers 211, multiple layers of repeatedly overlapping touch layers 210 are formed, combined with Figure 6 As shown, the external incident light S0 is gradually reduced in the touch layer 210, reducing the reflection of the touch structure 21 on the external light S0, while ensuring the transmission of the touch signal of the touch structure 21; adopting this touch structure design can reduce the number of display panel shading layers prepared, reduce the preparation process, and reduce the thickness of the display panel, ultimately ensuring the display effect of the display panel.

[0030] It should be noted that the display panel 200 also includes other structures, such as a thin film encapsulation layer. Multiple structures work together to realize image display on the display panel, which will not be listed one by one here.

[0031] In summary, the display panel provided by the embodiment of the invention has a touch layer formed by repeatedly overlapping multiple transparent conductive layers and metal layers, and the touch layer of the display panel has a transmittance of >85% for light emitted from the display area. The touch structure can not only reflect external light, but also improve the light extraction efficiency of the display panel. Due to the removal of the shading structure and the insulating layer above the touch layer, the number of film layers prepared for the touch structure of the display panel is reduced, the difficulty of the preparation process is reduced, the thickness of the display panel is thinned, and the transmittance of the touch structure ensures the display effect of the display panel.

[0032] As a feasible implementation method, combined with Figure 6 As shown, optionally, the touch layer 210 includes a first transparent conductive layer 2111, a first metal layer 2121, a second transparent conductive layer 2112, a second metal layer 2122 and a third transparent conductive layer 2113 stacked in sequence along the thickness direction of the display panel (as shown in the Z direction in the figure), and the first metal layer 2121 and the second metal layer 2122 are electrically connected.

[0033] Specifically, the touch layer 210 is configured to include a five-layer stacked structure, which, along the Z direction in the figure, is a first transparent conductive layer 2111, a first metal layer 2121, a second transparent conductive layer 2112, a second metal layer 2122, and a third transparent conductive layer 2113. The first metal layer 2121 and the second metal layer 2122 are electrically connected to form a parallel configuration, which can reduce the contact impedance of the touch layer 210, reduce the voltage drop, ensure the transmission of the touch signal of the metal layer 210, and improve the sensitivity of the touch function.

[0034] As a feasible implementation method, continue to combine 2- Figure 6 As shown, optionally, the first transparent conductive layer 2111 , the second transparent conductive layer 2112 and the third transparent conductive layer 2113 are made of the same material, and the first metal layer 2121 and the second metal layer 2122 are made of the same material.

[0035] Specifically, the multi-layer transparent conductive layer 211 uses the same material, the multi-layer metal layer 222 uses the same material, the first transparent conductive layer 2111, the second transparent conductive layer 2112 and the third transparent conductive layer 2113 use the same material, and the first metal layer 2121 and the second metal layer 2122 use the same material, which can reduce the difficulty of preparing the touch layer 210 and reduce production costs.

[0036] As a feasible implementation method, continue to combine Figure 2-Figure 6 As shown, optionally, the first transparent conductive layer 2111 includes indium tin oxide, and the first metal layer 2121 includes silver.

[0037] Specifically, the first transparent conductive layer 2111 uses indium tin oxide (ITO), and the first metal layer 2121 uses silver (Ag), forming an ITO / Ag / ITO / Ag / ITO stacked structure, which can take into account both transmittance and conductivity. The transmittance of this structure for the outgoing light of the display area 20 / AA is >85%, ensuring the light output efficiency of the display panel.

[0038] As a feasible implementation method, continue to combine Figure 6 As shown, optionally, the thickness of the first metal layer 2121 is 10 nm to 30 nm, and the thickness of the second metal layer 2121 is 10 nm to 30 nm.

[0039] Specifically, the first metal layer 2121 and the second metal layer 2122 can be made of silver (Ag) with a nanometer-level thickness. When the thickness of the first metal layer 2121 and the second metal layer 2122 is between 10nm and 30nm, the silver (Ag) can form a nanometer-level film-like metal layer with a transmittance of greater than 85% for the light S1 emitted from the display area 20 / AA, resulting in a better display quality for the display panel 200. Experimental tests have shown that when the thickness of the first metal layer 2121 and the second metal layer 2122 is less than 10nm, discontinuous silver (Ag) film formation may occur, affecting the transmission of touch signals. When the thickness of the first metal layer 2121 and the second metal layer 2122 is greater than 30nm, the silver (Ag) film is relatively thick, resulting in a low transmittance of the light S1 emitted from the display panel.

[0040] As a feasible implementation method, continue to refer to Figure 2 and Figure 4 As shown, optionally, the touch structure 21 includes a touch layer 210 , and the touch layer 210 includes a plurality of block-shaped touch electrodes 220 .

[0041] Specifically, the display panel 200 includes a mutual capacitance touch display panel and a self capacitance touch display panel in which touch electrodes are arranged in the same layer. The touch structure 21 adopts a touch layer 210, and the touch layer 210 includes a plurality of block-shaped touch electrodes 220. Figure 4 As shown, Figure 2 It can be a schematic diagram of the structure of a mutual capacitance touch display panel in which the touch electrodes are arranged in the same layer, combined with Figure 2 In the X direction, a plurality of block-shaped touch electrodes 220 are connected to form a touch sensing electrode (Rx), and a touch driving electrode (Tx) is used to transmit a touch driving signal; Figure 2 In the Y direction, multiple block-shaped touch electrodes 220 can be connected through a bridge structure to form a touch driving electrode (Tx). The touch sensing electrode (Rx) is used to transmit the touch sensing signal. The touch sensing electrode (Rx) and the touch driving electrode (Tx) are prepared on the same layer, and touch display can be realized based on the mutual capacitance touch principle. Figure 3 It can be a schematic diagram showing the structure of a self-capacitive touch display panel in which the touch electrodes are arranged in the same layer, such as Figure 3 As shown, the plurality of block touch electrodes 220 include a plurality of block self-capacitive touch electrodes (Tx / Rx). The self-capacitive touch electrodes (Tx / Rx) can be used to transmit touch drive signals and touch sensing signals, and can realize touch display based on the self-capacitive touch principle. The embodiment of the present invention does not limit the number, arrangement, and shape of the touch electrodes. Figure 2 and Figure 3 Only one feasible arrangement is shown; more arrangements are not listed here one by one.

[0042] As a feasible implementation method, refer to Figure 2 and Figure 5 As shown, optionally, the touch structure 21 includes a first touch layer 201, a second touch layer 202 and an insulating layer 203 located between the first touch layer 201 and the second touch layer 202, the first touch layer includes a plurality of first touch electrodes (Tx), and the second touch layer includes a plurality of second touch electrodes (Rx).

[0043] Specifically, the display panel 200 includes a mutual capacitance touch display panel in which touch electrodes are arranged in different layers. The touch structure 21 includes a first touch layer 201, a second touch layer 202, and an insulating layer 203 located between the first touch layer 201 and the second touch layer 202. The insulating layer 203 can be an organic insulating layer, such as: polyimide, polyphthalimide, polyphthalamide, acrylic resin, benzocyclobutene or phenolic resin, etc.; the insulating layer 203 can also be an inorganic insulating layer, such as silicon oxide SiO2, silicon nitride SiN, silicon oxynitride SiON, etc., which is not limited here. The first touch layer 201 includes multiple first touch electrodes, and the second touch layer 210 includes multiple second touch electrodes. For example, the first touch electrodes are touch drive electrodes (Tx), and the second touch electrodes are touch sensing electrodes (Rx). Alternatively, the first touch electrodes are touch sensing electrodes (Rx), and the second touch electrodes are touch drive electrodes (Tx). The touch drive electrodes (Tx) are used to transmit touch drive signals, and the touch sensing electrodes (Rx) are used to transmit touch sensing signals. The touch drive electrodes (Tx) and the touch sensing electrodes (Rx) are arranged in different layers, and touch display can be achieved based on the mutual capacitance touch principle. The embodiment of the present invention does not limit the number, arrangement, and shape of the touch electrodes.

[0044] As a feasible implementation method, continue to refer to Figure 2-Figure 5 As shown, optionally, the display panel 200 further includes a non-display area NA surrounding the display area 20 / AA, and the non-display area NA includes a plurality of traces 204 that are in the same layer and have the same structure as the touch layer 210 .

[0045] Specific, combined Figure 2 and Figure 3 As shown, the display panel 200 also includes a non-display area NA surrounding the display area 20 / AA. The non-display area NA generally includes peripheral driving elements, peripheral wiring, and a fan-out area. In this embodiment, a plurality of wirings 204 having the same layer and the same structure as the touch layer 210 can be provided in the non-display area NA, such as signal lines for transmitting touch driving signals and touch sensing electrodes, or a plurality of data lines, a plurality of scan lines, etc.

[0046] Figure 7 yes Figure 2 A schematic cross-sectional view of another display panel in the AA' direction. As a feasible embodiment, in combination with Figure 2 and Figure 7 As shown, optionally, the display panel 200 includes a base substrate 301; a pixel circuit layer 40, located on one side of the base substrate 301; a plurality of light-emitting elements 50, located on a side of the pixel circuit layer 40 away from the base substrate 301; a color resist layer 60, the color resist layer 60 including a plurality of color resists 61 corresponding to the light-emitting elements 50; and a touch layer 210 located on a side of the color resist layer 60 away from the light-emitting elements 50.

[0047] Specifically, the display panel 200 includes a base substrate 301 and a buffer layer 302, a pixel circuit layer 40, a plurality of light-emitting elements 50, a color resist layer 60 and a touch layer 210, which are sequentially located on one side of the base substrate 301. The base substrate 301 may be a flexible substrate or a rigid substrate. For example, it may be formed of any suitable insulating material with flexibility, and is used to block oxygen and moisture, and prevent moisture or impurities from diffusing into the display panel 20 through the base substrate. The embodiment of the present invention does not limit the material type of the base substrate. The pixel circuit layer 40 is located on one side of the base substrate 301, and is used to drive the plurality of light-emitting elements 50 to emit light. The light-emitting elements 50 may be any light-emitting element known to those skilled in the art, and may include, for example, Mini-LED (sub-millimeter light-emitting diode), Micro-LED (micro light-emitting diode), OLED (organic light-emitting diode), etc. The following description will be made using an organic light-emitting diode as an example of a light-emitting element.

[0048] Specific, combined Figure 7As shown, the pixel circuit layer 40 may include a plurality of periodically arranged thin film transistors 70 (TFTs) and a pixel circuit composed of the thin film transistors 70 , and the pixel circuit is used to drive the light emitting element 50 to emit light. Exemplarily, this embodiment uses a top-gate thin film transistor 70 as an example to illustrate the structure. The structure of the pixel circuit layer 40 includes a gate layer 71 located on the buffer layer 302, a gate insulating layer 401 located on the gate layer 71, an active layer 72 located on the gate insulating layer 401, an interlayer insulating layer 402 located on the active layer 72, a source electrode 73 and a drain electrode 74 located on the interlayer insulating layer 402, the source electrode 73 and the drain electrode 74 are electrically connected to the source region and the drain region respectively through contact holes, a planarization layer 403 located on the source electrode 73 and the drain electrode 74 of the thin film transistor 70, which has a planarization effect, a pixel electrode 75 located on the planarization layer 403, and a pixel defining layer 404 located on the pixel electrode 75, the pixel defining layer 404 including a plurality of pixel openings; a plurality of light-emitting elements 50 are arranged in a one-to-one correspondence with the plurality of pixel openings, and the pixel electrode 75 is electrically connected to the anode electrode of the light-emitting element 50 for providing a light-emitting voltage. The gate insulating layer 401, the interlayer insulating layer 402 and the pixel defining layer 404 can be formed by inorganic insulating layers such as silicon oxide or silicon nitride, and the planarizing layer 403 can be formed by an organic insulating layer. More structures and preparation materials of the pixel circuit layer 40 are not listed here one by one. Figure 7 Only two thin film transistors 70 and their corresponding two light emitting elements 50 are shown in the figure, and more thin film transistor 70 structures are not shown one by one here.

[0049] A color resist layer 60 is provided on the light-emitting side of the light-emitting element 50, and a plurality of color resists 61 are provided corresponding to the light-emitting element 50. The color resist 61 can transmit light of a specified wavelength and only transmit the light emitted by the light-emitting element of its corresponding color, thereby improving the light-emitting purity of the light-emitting element. According to the color of the light-emitting element, the color resist layer 60 includes a red filter layer, a green filter layer, and a blue filter layer. A color resist 61 is provided corresponding to the light-emitting side of the light-emitting element 50. The thickness of the color resist 61 is thinner than that of a traditional polarizer and can be controlled at the nanometer level. On the one hand, the light-emitting purity of the light-emitting element can be improved, the light-emitting efficiency of the display device can be effectively improved, and the imaging effect of the display panel can be improved. On the other hand, the color resist can block light of other colors from entering the display panel, thereby playing a role of anti-reflection and increasing the display contrast of the display panel. On the other hand, using a color resist with a thinner film layer instead of a polarizer can improve the bending characteristics of the display panel and meet the bending requirements of the flexible display panel.

[0050] Furthermore, the touch layer 210 is arranged on the side of the color resist layer away from the light-emitting element. The touch layer 210 adopts a multi-layer transparent conductive layer 211 and a metal layer 222 that are repeatedly overlapped, such as an ITO / Ag / ITO / Ag / ITO stacked structure. With this structure, the transmittance of the light emitted from the display area 20 / AA is greater than 85%, which meets the touch display function while having a high visual imaging effect.

[0051] Figure 8 yes Figure 2 A schematic cross-sectional view of another display panel along the AA' direction; Figure 9 for Figure 8 A schematic diagram of a film structure of a touch layer in the second display area; Figure 10 for Figure 8 A schematic diagram of a film structure of the touch layer in the second display area. Based on the above embodiment, combined with Figure 2 、 Figure 6 、 Figures 8-10 As shown, optionally, the display area 20 / AA includes a first display area A1 and a second display area A2, and the second display area A2 is multiplexed as a light-sensing element setting area; the second display area A2 includes multiple light-transmitting areas, and the number of film layers in the touch layer 210' in the second display area A2 is less than the number of film layers in the touch layer 210 in the first display area A1.

[0052] Specifically, the display area 20 / AA includes a first display area A1 and a second display area A2. The first display area A1 is used for normal display of the image, and the second display area A2 is reused as a light-sensing element setting area. The light-sensing element setting area can be set with a fingerprint sensor, a camera, etc. The second display area A2 includes multiple light-transmitting areas for transmitting external light for fingerprint and face data collection, etc. The number of film layers in the touch layer 210' in the second display area A2 can be reduced, such as reducing the number of film layers of the transparent conductive layer 211 in the second display area A2, and / or reducing the number of film layers of the metal layer 212, so that the number of film layers in the touch layer 210' in the second display area A2 is less than the number of film layers in the touch layer 210 in the first display area A1, so as to increase the light transmittance of the light-transmitting area and improve the functional characteristics of devices such as fingerprint sensors and cameras, such as improving the fingerprint recognition function of the fingerprint sensor and the accuracy of face recognition.

[0053] On the basis of the above embodiment, continue to combine Figure 6 and Figure 10 As shown, optionally, the touch layer 210 ′ in the second display area A2 has at least one less metal layer 212 than the touch layer 210 in the first display area A1 .

[0054] Specifically, considering that the metal layer 212 has low transparency and still has certain reflective properties for the incident light S0, the number of metal layers 212 in the touch layer 210' in the second display area A2 can be reduced so that the touch layer 210' in the second display area A2 has at least one less metal layer 212 than the touch layer 210 in the first display area A1, thereby further improving the light transmittance of the light sensing element setting area.

[0055] Based on the same inventive concept, an embodiment of the present invention further provides a display device. Figure 11 A schematic diagram of the structure of a display device provided by an embodiment of the present invention is shown in FIG. Figure 11 As shown, the display device includes any one of the display panels provided in the above embodiments. Figure 8 As shown, the display device 300 includes a display panel 200. Therefore, the display device also has the beneficial effects of the display panel in the above embodiment. The similarities can be understood by referring to the above explanation of the display panel, which will not be repeated below.

[0056] The display device 300 provided by the embodiment of the present invention can be Figure 11 The tablet computer shown can also be any electronic product with a display function, including but not limited to the following categories: mobile phones, televisions, laptops, desktop monitors, digital cameras, smart bracelets, smart glasses, car displays, industrial control equipment, medical display screens, touch interactive terminals, etc., and the embodiments of the present invention do not specifically limit this.

[0057] Figure 12 yes Figure 11 A schematic diagram of a film structure of the first touch line along the CC' direction; Figure 13 yes Figure 11 A schematic diagram of a film structure of the second touch line along the DD' direction. Figure 11-13 As shown, optionally, the display device 300 also includes a driver chip 400 located at the first end D1 of the display panel 200; the display panel 200 includes a first touch line 401 and a second touch line 402, the first touch line 401 provides a signal to the touch layer 2101 at the first end D1 of the display panel 200, and the second touch line 402 provides a signal to the touch layer 2102 at the second end D2 of the display panel 200, and the number of film layers in the second touch line 402 is less than the number of film layers in the first touch line 401; wherein, the second end D2 of the display panel 200 is the other end opposite to the first end D1 of the display panel 200.

[0058] For details, please refer to Figure 11As shown, along the Y direction in the figure, the display panel 200 includes a first end D1 and a second end D2 relative to each other, and the display device 300 also includes a driving chip 400. The driving chip 400 is located at the first end D1 of the display panel 200 and is used to drive the touch layer to transmit touch signals. The driving chip 400 can be integrated with the display chip in the same chip to jointly realize the display and touch functions of the display panel.

[0059] The display panel 200 includes at least a touch layer 2101 near a first end D1 and a touch layer 2102 near a second end D2. The driver chip 400 provides touch signals to the touch layer 2101 via a first touch trace 401 and provides touch signals, such as a touch drive signal and a touch sensing signal, to the touch layer 2102 via a second touch trace 402. Because the touch layer 2102 is farther away from the driver chip 400 than the touch layer 2101, the second touch trace 402 connecting the driver chip 400 has a higher impedance than the first touch trace 401, resulting in a difference in touch signals between the touch layer 2101 and the touch layer 2102. The resistance of the second touch line 402 can be reduced by reducing the number of film layers in the second touch line 402, so that the number of film layers in the second touch line 402 is less than the number of film layers in the first touch line 401, so as to balance the impedance difference between the second touch line 402 and the first touch line 401, so that the touch signals of the touch layer 2101 and the touch layer 2102 are consistent.

[0060] It should be noted that Figure 11 Only two touch layers and their touch traces are shown as a schematic diagram of their connection. The connection between more touch layers and touch traces is not shown here one by one. In particular, along the direction from the driver chip 400 to the display panel 200, the display panel 200 includes multiple touch layers, and the multiple touch layers are respectively connected to the driver chip 400 through touch traces. Since the distances between the multiple touch layers and the driver chip are different, the touch traces connected thereto are also different. By setting the number of film layers or the thickness of the film layers of the touch traces far away from the driver chip 400 to be smaller than the number of film layers or the thickness of the touch traces close to the driver chip 400, the impedance differences of the touch traces can be balanced in a way that reduces the resistance of the touch traces, so that the touch signals of each touch layer are consistent, and the display panel has a good touch display function.

[0061] On the basis of the embodiment, continue to combine Figure 11-13 As shown, optionally, the second touch trace 402 has at least one less transparent conductive layer than the first touch trace 401 .

[0062] Specifically, the second touch trace 402 and the first touch trace 401 respectively include a touch layer formed by repeatedly overlapping multiple layers of transparent conductive layers 211 and metal layers 212. Considering that the resistivity of the transparent conductive layer 211 is generally large, such as ITO material, which has a large impedance, the second touch trace 402 is reduced by at least one transparent conductive layer 211 compared to the first touch trace 401. Figure 12 and Figure 13 As shown, the resistance difference between the second touch line 402 and the first touch line 401 can be balanced, ensuring that the touch signals of each touch layer are consistent, and ensuring that the display panel has a good touch display function.

[0063] Note that the above are only preferred embodiments 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 that various obvious changes, readjustments, and substitutions can be made by those skilled in the art 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 the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: include: Display area; A touch structure covering the display area, the touch structure comprising a touch layer formed by repeatedly overlapping multiple transparent conductive layers and metal layers, wherein the touch layer has a transmittance greater than 85% for light emitted from the display area; The display area includes a first display area and a second display area, the second display area is multiplexed as a light sensing element setting area; the second display area includes a plurality of light-transmitting areas, and the number of film layers in the touch layer in the second display area is less than the number of film layers in the touch layer in the first display area; Wherein, no light shielding structure is provided on a side of the touch layer away from the display area.

2. The display panel according to claim 1, wherein: The touch layer includes a first transparent conductive layer, a first metal layer, a second transparent conductive layer, a second metal layer and a third transparent conductive layer stacked in sequence along the thickness direction of the display panel. The first metal layer and the second metal layer are electrically connected.

3. The display panel according to claim 2, wherein: The first transparent conductive layer, the second transparent conductive layer, and the third transparent conductive layer are made of the same material, and the first metal layer and the second metal layer are made of the same material.

4. The display panel according to claim 3, wherein: The first transparent conductive layer includes indium tin oxide, and the first metal layer includes silver.

5. The display panel according to claim 2, wherein: The thickness of the first metal layer is 10 nm to 30 nm, and the thickness of the second metal layer is 10 nm to 30 nm.

6. The display panel according to claim 1, wherein: The touch structure includes a touch layer, and the touch layer includes a plurality of block-shaped touch electrodes.

7. The display panel according to claim 1, wherein: The touch structure includes a first touch layer, a second touch layer, and an insulating layer located between the first touch layer and the second touch layer. The first touch layer includes a plurality of first touch electrodes, and the second touch layer includes a plurality of second touch electrodes.

8. The display panel according to claim 1, wherein: The display panel further includes a non-display area surrounding the display area, and the non-display area includes a plurality of wirings in the same layer and with the same structure as the touch layer.

9. The display panel according to claim 1, wherein: The display panel includes: substrate; A pixel circuit layer is located on one side of the base substrate; A plurality of light-emitting elements are located on a side of the pixel circuit layer away from the base substrate; a color resist layer, the color resist layer comprising a plurality of color resists corresponding to the light emitting elements; The touch layer is located on a side of the color resist layer away from the light emitting element.

10. The display panel according to claim 1, wherein The touch layer in the second display area has at least one less metal layer than the touch layer in the first display area.

11. A display device, characterized in that: The display panel comprises any one of claims 1 to 10.

12. The display device according to claim 11, wherein Also included is a driving chip located at the first end of the display panel; The display panel includes a first touch line and a second touch line, the first touch line provides a signal to a touch layer at a first end of the display panel, the second touch line provides a signal to a touch layer at a second end of the display panel, and the number of film layers in the second touch line is less than the number of film layers in the first touch line; The second end of the display panel is the other end opposite to the first end of the display panel.

13. The display device according to claim 12, wherein: The second touch trace has at least one less transparent conductive layer than the first touch trace.

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