Display Panel

Abstract

This application provides a display panel including a substrate, a driving substrate, a pixel definition layer, sub-pixels, and a hanging structure. The hanging structure includes a first metal layer, a first insulating layer, and a second metal layer sequentially stacked from near the driving substrate toward away from the driving substrate; the first metal layer and the second metal layer are electrically connected to the driving substrate respectively; the first metal layer is in contact with an organic light-emitting layer, and the second metal layer is in contact with a cathode. In response to the display panel switching to touch mode, the driving substrate transmits a cathode signal to the organic light-emitting layer through the first metal layer, and transmits a touch detection signal to the cathode through the second metal layer; in response to the display panel switching to display mode, the driving substrate transmits a cathode signal to the cathode through the second metal layer. This display panel can reduce the risk of signal transmission interference between gate traces and data traces and the cathode touch signal, thus avoiding noise and preventing false touch alarms.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) display panels have many advantages such as full solid state, active light emission, high brightness, high contrast, ultra-thin, low power consumption, no viewing angle limitation, wide operating temperature range, etc., and are receiving more and more attention. With the development of the Internet of Things, human-computer interaction is becoming more and more frequent, and the demand for screens with touch display is also increasing. In-cell touch technology has been favored by the market due to its advantages such as narrow border, IC integrated display and touch function, reduced IC cost, reduced module thickness and mature process.

[0003] In the existing OLED display panels that use In-cell touch technology, since the cathode is reused as a signal transmission carrier in both the touch and display stages, and the gate and data lines overlap with the cathode, the signal transmission of the gate and data lines will cause signal fluctuations on the cathode, thereby interfering with the touch signal, forming noise, and causing false touch points. Summary of the invention

[0004] The present application provides a display panel, aiming to solve the problem in existing OLED display panels that signal transmission of gate wiring and data wiring interferes with touch signals, resulting in false touch point reports.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is: to provide a display panel having a display mode and a touch mode; including:

[0006] substrate;

[0007] A driving substrate, disposed on the substrate;

[0008] A pixel definition layer is disposed on the driving substrate; the pixel definition layer protrudes from the driving substrate and surrounds a pixel accommodation area;

[0009] A sub-pixel is arranged in the pixel accommodating area; the sub-pixel comprises an anode, an organic light-emitting layer and a cathode which are sequentially stacked in a direction from close to the driving substrate to away from the driving substrate;

[0010] A suspension structure is arranged on the pixel definition layer and protrudes from the pixel accommodating area; the suspension structure includes a first metal layer, a first insulating layer and a second metal layer stacked in sequence from close to the drive substrate to away from the drive substrate; the first metal layer and the second metal layer are electrically connected to the drive substrate respectively; the first metal layer is arranged in contact with the organic light-emitting layer, and the second metal layer is arranged in contact with the cathode;

[0011] In which, in response to the display panel switching to the touch mode, the driving substrate transmits a cathode signal to the organic light-emitting layer through the first metal layer, and the driving substrate transmits a touch detection signal to the cathode through the second metal layer; in response to the display panel switching to the display mode, the driving substrate transmits a cathode signal to the cathode through the second metal layer.

[0012] In a specific embodiment, it also includes:

[0013] A control switch having a source electrode, a drain electrode and a gate electrode electrically connected to the drive substrate respectively; wherein one of the source electrode and the drain electrode is electrically connected to the second metal layer, and the other is electrically connected to the first metal layer;

[0014] In response to the display panel switching to the display mode, the driving substrate transmits a control signal to the gate to open the control switch, so that the first metal layer and the second metal layer are connected in parallel; the driving substrate transmits a cathode signal to the cathode through the second metal layer, and transmits a cathode signal to the organic light-emitting layer through the first metal layer.

[0015] In a specific embodiment, in response to the display panel switching to the touch mode, the driving substrate turns off the control switch through the control signal; the driving substrate transmits a cathode signal to the organic light-emitting layer through the first metal layer, and the driving substrate transmits a touch detection signal to the cathode through the second metal layer.

[0016] In a specific embodiment, the source electrode is electrically connected to the first metal layer, and the drain electrode is electrically connected to the second metal layer; the driving substrate transmits a cathode signal to the source electrode;

[0017] In response to the display panel switching to the touch mode, the drive substrate transmits a touch detection signal to the drain; in response to the display panel switching to the display mode, the drive substrate transmits a cathode signal to the drain.

[0018] In a specific embodiment, the source electrode is electrically connected to the second metal layer, and the drain electrode is electrically connected to the first metal layer; the driving substrate transmits a cathode signal to the drain electrode;

[0019] In response to the display panel switching to the touch mode, the drive substrate transmits a touch detection signal to the source electrode; in response to the display panel switching to the display mode, the drive substrate transmits a cathode signal to the source electrode.

[0020] In a specific embodiment, the overhang structure further includes:

[0021] The second insulating layer is arranged on a surface of the second metal layer away from the first insulating layer; along a first direction perpendicular to the stacking direction of the display panel, two sides of the second insulating layer protrude from the second metal layer.

[0022] In a specific embodiment, a projection of the second metal layer on the substrate along the stacking direction is located within a projection of the first insulating layer on the substrate along the stacking direction.

[0023] In a specific embodiment, the organic light-emitting layer completely covers the side wall surface of the first metal layer and a portion of the side wall surface of the first insulating layer close to the first metal layer;

[0024] The cathode completely covers the side wall surface of the second metal layer and a portion of the side wall surface of the first insulating layer close to the second metal layer.

[0025] In a specific embodiment, the first metal layer is arranged around the pixel accommodating area; the projection shape of the first metal layer on the substrate along the stacking direction is one of a circle, a quadrilateral or a hexagon; and a plurality of the first metal layers are interconnected to form a grid structure.

[0026] In a specific embodiment, it also includes:

[0027] An etching protection layer, covering a surface of the cathode that is away from the organic light-emitting layer and overlapping the second insulating layer of the overhanging structure;

[0028] A first encapsulation layer, covering a side of the etching protection layer away from the substrate;

[0029] The second packaging layer is coated on a side of the first packaging layer facing away from the substrate.

[0030] Beneficial effects of the embodiments of the present application: Different from the prior art, the present application provides a display panel having a display mode and a touch mode; the display panel includes a substrate, a driving substrate, a pixel definition layer, sub-pixels and a suspension structure. Among them, the driving substrate is arranged on the substrate; the pixel definition layer is arranged on the driving substrate; the pixel definition layer protrudes from the driving substrate and surrounds a pixel accommodation area; the sub-pixels are arranged in the pixel accommodation area; the sub-pixels include an anode, an organic light-emitting layer and a cathode stacked in sequence from close to the driving substrate to away from the driving substrate. The suspension structure is arranged on the pixel definition layer and protrudes from the pixel accommodation area; the suspension structure includes a first metal layer, a first insulating layer and a second metal layer stacked in sequence from close to the driving substrate to away from the driving substrate; and the first metal layer and the second metal layer are electrically connected to the driving substrate respectively; the first metal layer is arranged in contact with the organic light-emitting layer, and the second metal layer is arranged in contact with the cathode. In response to the display panel switching to the touch mode, the driving substrate transmits a cathode signal to the organic light-emitting layer through the first metal layer, and the driving substrate transmits a touch detection signal to the cathode through the second metal layer; in response to the display panel switching to the display mode, the driving substrate transmits a cathode signal to the cathode through the second metal layer. By arranging a first metal layer electrically connected to the organic light-emitting layer and a second metal layer electrically connected to the cathode in the overhang structure, when the display panel switches to the display mode, the cathode signal is transmitted to the cathode through the second metal layer to drive the organic light-emitting layer to emit light; when the display panel switches to the touch mode, the touch detection signal is transmitted to the cathode through the second metal layer to realize the touch function; at the same time, the cathode signal is transmitted to the organic light-emitting layer through the first metal layer to ensure that the organic light-emitting layer can emit light normally in the touch mode, and an electrical signal shielding is formed between the cathode and the gate wiring and / or the data wiring, so as to reduce the risk of the signal transmission of the gate wiring and the data wiring interfering with the touch signal of the cathode and forming noise, thereby avoiding the occurrence of the touch false alarm point. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of incell routing of a display panel in the prior art;

[0032] Figure 2 for Figure 1 A partial enlarged view of a touch block in the middle;

[0033] Figure 3 A schematic diagram of the structure of a display panel provided in the first embodiment of the present application;

[0034] Figure 4a-4c for Figure 1 A schematic diagram of the projection shape of the first metal layer on the substrate;

[0035] Figure 5A connection diagram of a control switch in a display panel provided in the second embodiment of the present application.

[0036] Description of Figure Numbers:

[0037] 1-substrate; 2-driving substrate; 3-pixel definition layer; 4-sub-pixel; 5-overhang structure; 6-control switch; 7-etching protection layer; 8-first encapsulation layer; 9-second encapsulation layer; 40-pixel accommodating area; 41-anode; 42-organic light-emitting layer; 43-cathode; 51-first metal layer; 52-first insulating layer; 53-second metal layer; 54-second insulating layer; 61-source; 62-drain; 63-gate. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0040] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] Organic Light Emitting Diode (OLED) display panels have many advantages such as full solid state, active light emission, high brightness, high contrast, ultra-thin, low power consumption, no viewing angle limitation, wide operating temperature range, etc., and are receiving more and more attention. With the development of the Internet of Things, human-computer interaction is becoming more and more frequent, and the demand for screens with touch display is also increasing. In-cell touch technology has been favored by the market due to its advantages such as narrow border, IC integrated display and touch function, reduced IC cost, reduced module thickness and mature process.

[0042] like Figure 1-Figure 2 As shown, Figure 1 It is a schematic diagram of incell routing of a display panel in the prior art; Figure 2 for Figure 1 A partial enlarged view of a touch block in the middle; In the existing OLED display panel using In cell touch technology, the display area of ​​the display panel is divided into multiple ITO (indium tin oxide) touch blocks, and the cathode is reused as a signal transmission carrier in the two stages of touch and display; that is, the cathode of the display panel is divided into multiple independent touch electrodes, and connected to the chip through touch leads, and a gate line and a data line are arranged under each touch block. When the display panel is switched to touch mode, the signal transmitted by the gate line and / or the data line will cause the touch electrode overlapping with the gate line and / or the data line to generate signal fluctuations, thereby interfering with the touch signal and forming noise, resulting in the occurrence of false touch points.

[0043] Based on this, the present application provides a display panel that can reduce the risk of signal transmission of gate wiring and data wiring interfering with the touch signal of the cathode and generating noise, thereby avoiding the occurrence of false touch point alarms.

[0044] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0045] See also Figure 3 , Figure 3 A schematic diagram of the structure of a display panel provided in the first embodiment of the present application. The present application provides a display panel, which may be an OLED touch display panel; the display panel has a display mode for displaying an image and a touch mode for detecting touch points; and the display panel has a display area for displaying an image, and a non-display area (not shown) for setting circuits, pads, frames and other structures. Specifically, Figure 3 As shown, the display panel may include a substrate 1 arranged in a display area, a driving substrate 2, a pixel definition layer 3, sub-pixels 4 and an overhang structure 5.

[0046] The substrate 1 is used to support and protect the film structures of the display panel; in a specific embodiment, the substrate 1 may be a glass substrate. The driving substrate 2 is disposed on the substrate 1 and is located on one side of the substrate 1; the driving substrate 2 may include a driving circuit layer (not shown), and the driving circuit layer integrates a gate 63 wiring and a data wiring, which is used to control and drive the sub-pixel 4 to emit light.

[0047] The pixel definition layer 3 is disposed on the driving substrate 2 and is located on a side surface of the driving substrate 2 away from the substrate 1. Specifically, the pixel definition layer 3 protrudes from the driving substrate 2 and surrounds a pixel accommodation area 40 for accommodating the sub-pixel 4. The sub-pixel 4 is disposed in the pixel accommodation area 40, and the sub-pixel 4 includes an anode 41, an organic light-emitting layer 42, and a cathode 43 which are sequentially stacked from close to the driving substrate 2 to away from the driving substrate 2; wherein the anode 41 is connected to the anode 41 power line, and the cathode 43 is connected to the cathode 43 power line, so that the light-emitting layer is conductive and emits light.

[0048] The overhang structure 5 is disposed on the pixel definition layer 3 and is located on a side surface of the pixel definition layer 3 away from the driving substrate 2, and the overhang structure 5 is disposed protruding from the pixel accommodating area 40, and is used to separate sub-pixels 4 of different colors to avoid pixel crosstalk. Specifically, the overhang structure 5 may include a first metal layer 51, a first insulating layer 52, and a second metal layer 53 stacked in sequence from close to the driving substrate 2 toward away from the driving substrate 2.

[0049] The first metal layer 51 is disposed on the surface of the pixel definition layer 3 and is electrically connected to the drive substrate 2; and the first metal layer 51 is disposed in contact with the organic light-emitting layer 42 of the sub-pixel 4, so that the drive substrate 2 can transmit the cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51. The second metal layer 53 is also electrically connected to the drive substrate 2; and the second metal layer 53 is disposed in contact with the cathode 43, so that the drive substrate 2 can transmit the cathode 43 signal or the touch detection signal to the cathode 43 through the second metal layer 53. The first insulating layer 52 is disposed between the first metal layer 51 and the second metal layer 53, and is used to separate the first metal layer 51 and the second metal layer 53, so that the first metal layer 51 and the second metal layer 53 are insulated from each other to avoid signal crosstalk.

[0050] In response to the display panel switching to the touch mode, the first metal layer 51 can be used as the common cathode 43, and the drive substrate 2 transmits the cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51, so that the organic light-emitting layer 42 keeps emitting light in the touch mode. At the same time, the second metal layer 53 can be used as a touch lead, and the drive substrate 2 transmits the touch detection signal to the cathode 43 through the second metal layer 53 to detect the touch point on the display panel.

[0051] In response to the display panel switching to the display mode, the second metal layer 53 can be used as a common cathode 43, and the drive substrate 2 transmits a cathode 43 signal to the cathode 43 through the second metal layer 53, so that the organic light-emitting layer 42 emits light normally. The first metal layer 51 can also be used as a common cathode 43, and the drive substrate 2 transmits a cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51, so as to avoid pixel loss caused by poor contact between the second metal layer 53 and the cathode 43 of a certain sub-pixel 4.

[0052] In this way, by providing a first metal layer 51 electrically connected to the organic light-emitting layer 42 and a second metal layer 53 electrically connected to the cathode 43 in the overhang structure 5, when the display panel switches to the display mode, the cathode 43 signal is transmitted to the cathode 43 through the second metal layer 53 to drive the organic light-emitting layer 42 to emit light; when the display panel switches to the touch mode, the touch detection signal is transmitted to the cathode 43 through the second metal layer 53 to realize the touch function; at the same time, the cathode 43 signal is transmitted to the organic light-emitting layer 42 through the first metal layer 51 to ensure that the organic light-emitting layer 42 can emit light normally in the touch mode, and an electrical signal shielding is formed between the cathode 43 and the gate 63 wiring and / or the data wiring to reduce the risk of signal transmission of the gate 63 wiring and the data wiring interfering with the touch signal of the cathode 43 and forming noise, thereby avoiding the occurrence of false touch alarm points.

[0053] In a specific embodiment, Figure 3 As shown, the overhang structure 5 may further include a second insulating layer 54; the second insulating layer 54 is disposed on a side surface of the second metal layer 53 away from the first insulating layer 52, and the second insulating layer 54 shields the second metal layer 53. The projection of the second insulating layer 54 on the substrate 1 along the stacking direction Z of the display panel completely covers the projection of the second metal layer 53 on the substrate 1 along the stacking direction Z. Specifically, along the first direction perpendicular to the stacking direction Z, both sides of the second insulating layer 54 protrude from the second metal layer 53 to form an eaves structure, so that when the organic light-emitting layer 42 and the cathode 43 are evaporated and deposited, the evaporation angle can be changed by the eaves structure, so that the cathode 43 overlaps with the second metal layer 53 and completely covers the organic light-emitting layer 42, so as to separate the second metal layer 53 from the organic light-emitting layer 42 and ensure that the second metal layer 53 and the organic light-emitting layer 42 are insulated.

[0054] Furthermore, the projection of the second metal layer 53 on the substrate 1 along the stacking direction Z is located within the projection of the first insulating layer 52 on the substrate 1 along the stacking direction Z, so that the first insulating layer 52 can better separate the first metal layer 51 from the second metal layer 53, ensure the insulation effect, and further avoid the occurrence of signal crosstalk. Specifically, along the direction from the first insulating layer 52 to the second metal layer 53, the width of the first insulating layer 52 and the width of the second metal layer 53 are gradually reduced to facilitate the deposition of the organic light-emitting material and the cathode 43 material on its side wall; and along the first direction X, the maximum width of the second metal layer 53 is less than or equal to the minimum width of the first insulating layer 52.

[0055] In a specific embodiment, Figure 3 As shown, the anode 41 is disposed on a surface of the driving substrate 2 in the pixel accommodating area 40 away from the substrate 1, and is etched into a preset pattern. The pixel definition layer 3 is located between the anode 41 and the anode 41 of the adjacent sub-pixel 4 to space the anodes 41 between the sub-pixels 4 to prevent the anodes 41 of the adjacent sub-pixels 4 from being connected to each other and affecting the display effect of the display panel. Preferably, both sides of the pixel definition layer 3 may also cover part of the anode 41.

[0056] The organic light-emitting layer 42 is disposed on the surface of the anode 41 away from the driving substrate 2. In a specific embodiment, the organic light-emitting layer 42 is deposited on the display panel by evaporation, and covers the anode 41 and part of the pixel definition layer 3, so as to completely cover the anode 41, and prevent the cathode 43 subsequently evaporated from contacting and conducting with the anode 41, thereby affecting the display effect.

[0057] The cathode 43 is disposed on the surface of the organic light-emitting layer 42 facing away from the anode 41. In a specific embodiment, the cathode 43 can also be evaporated on the surface of the organic light-emitting layer 42 by an evaporation source. During the evaporation process, the cathode 43 can be overlapped on the second metal layer 53 by changing the evaporation angle, so that the cathode 43 and the second metal layer 53 are in contact, so that the cathode 43 of the sub-pixel 4 is connected to the common cathode 43.

[0058] The organic light-emitting layer 42 completely covers the sidewall surface of the first metal layer 51 and the sidewall surface of the first insulating layer 52 close to the first metal layer 51, so as to isolate the cathode 43 from the first metal layer 51, and avoid the cathode 43 and the first metal layer 51 being connected, which may cause signal crosstalk. The cathode 43 completely covers the sidewall surface of the second metal layer 53 and the sidewall surface of the first insulating layer 52 close to the second metal layer 53, so as to isolate the organic light-emitting layer 42 from the second metal layer 53, and avoid the organic light-emitting layer 42 and the second metal layer 53 being connected, which may cause signal crosstalk.

[0059] See also Figure 4a-4c , Figure 4a-4cfor Figure 1 Schematic diagram of the projection shape of the first metal layer on the substrate. In a specific embodiment, the overhang structure 5 is arranged around the pixel accommodating area 40 to separate adjacent sub-pixels 4. It can be understood that the first metal layer 51 is also arranged around the pixel accommodating area 40 to uniformly transmit the cathode 43 signal to the organic light emitting layer 42 of the sub-pixel 4. Figure 4a As shown, the projection shape of the first metal layer 51 on the substrate 1 along the stacking direction Z can be a quadrilateral, and multiple first metal layers 51 are interconnected to form a grid structure to achieve a mesh connection of the common cathode 43 between the sub-pixels 4, thereby reducing the impedance of the common cathode 43, ensuring the uniformity of the cathode 43 signal, and avoiding the occurrence of regional display brightness unevenness.

[0060] Of course, in other embodiments, the projection shape of the first metal layer 51 along the stacking direction Z on the substrate 1 may also be a circle (eg Figure 4b ) or hexagonal (such as Figure 4c ).

[0061] In a specific embodiment, Figure 3 As shown, the display panel may further include an etching protection layer 7, a first encapsulation layer 8, and a second encapsulation layer 9. The etching protection layer 7 is used to provide anti-etching protection to the sub-pixel 4 during the preparation of sub-pixels 4 of other colors of the display panel, so as to prevent the prepared sub-pixel 4 from being damaged during the subsequent preparation process. Specifically, the etching protection layer 7 is disposed on the side of the cathode 43 away from the organic light-emitting layer 42 and covers the surface of the cathode 43, and one end of the etching protection layer 7 is overlapped on the second insulating layer 54 to provide anti-etching protection to each film layer of the sub-pixel 4. The etching protection layer 7 may include a non-conductive inorganic material; specifically, the etching protection layer 7 may include an inorganic material containing silicon, such as a SiNx inorganic material.

[0062] After all sub-pixels 4 are prepared, a first encapsulation layer 8 and a second encapsulation layer 9 may be provided on the display panel to encapsulate the display panel as a whole. Specifically, the first encapsulation layer 8 is coated on the side of the etching protection layer 7 away from the driving substrate 2; the second encapsulation layer 9 is coated on the side of the first encapsulation layer 8 away from the driving substrate 2. The first encapsulation layer 8 may be an organic encapsulation layer, and the second encapsulation layer 9 may be an inorganic encapsulation layer.

[0063] See also Figure 5 , Figure 5A connection diagram of a control switch in a display panel provided in the second embodiment of the present application. The display panel provided in the second embodiment of the present application has a substantially similar structure to that provided in the first embodiment of the present application, except that, in the second embodiment of the present application, the display panel may further include a control switch 6 disposed in a non-display area. The control switch 6 may be integrated in the driving circuit layer, and the control switch 6 has a source 61, a drain 62, and a gate 63 that are electrically connected to the driving substrate 2, respectively; the driving substrate 2 regulates the opening and closing of the control switch 6 by transmitting a control signal to the gate 63. One of the source 61 and the drain 62 is electrically connected to the second metal layer 53, and the other is electrically connected to the first metal layer 51, so as to control whether the first metal layer 51 and the second metal layer 53 are electrically connected by turning the control switch 6 on or off.

[0064] Specifically, in response to the display panel switching to the display mode, the drive substrate 2 can transmit a control signal to the gate 63 of the control switch 6 to open the control switch 6, so that the first metal layer 51 is connected in parallel with the second metal layer 53; the drive substrate 2 can transmit the cathode 43 signal to the cathode 43 through the second metal layer 53, and transmit the cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51, thereby driving the organic light-emitting layer 42 to emit light. In this way, the drive signal of the cathode 43 can be increased, the load of the cathode 43 is reduced, and the uniformity of the entire surface of the cathode 43 is improved, thereby effectively reducing the voltage drop and avoiding the occurrence of uneven display. In addition, by increasing the cathode 43 signal transmitted from the first metal layer 51 to the part of the organic light-emitting layer 42 away from the cathode 43, the luminous efficiency of the organic light-emitting layer 42 can also be improved, and the display brightness of the organic light-emitting layer 42 is effectively improved.

[0065] In response to the display panel switching to the touch mode, the drive substrate 2 can transmit a control signal to the gate 63 of the control switch 6 to close the control switch 6, so that the first metal layer 51 is electrically disconnected from the second metal layer 53. The drive substrate 2 can transmit a touch detection signal to the cathode 43 through the second metal layer 53, so as to detect the touch point through the cathode 43 of the display panel to realize the touch function. At the same time, the drive substrate 2 can also transmit the cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51 to ensure that the organic light-emitting layer 42 can emit light normally in the touch mode, and form an electrical signal shielding between the cathode 43 and the gate 63 wiring and / or the data wiring, so as to reduce the risk of signal transmission of the gate 63 wiring and the data wiring interfering with the touch signal of the cathode 43 and forming noise, thereby avoiding the occurrence of false touch points.

[0066] In a specific embodiment, the source 61 of the control switch 6 can be electrically connected to the first metal layer 51, and the drain 62 is electrically connected to the second metal layer 53. In response to the display panel switching to the touch mode, the control switch 6 is turned off, and the source 61 and the drain 62 are electrically disconnected; the driving substrate 2 transmits the cathode 43 signal to the source 61 and the first metal layer 51 of the control switch 6 to drive the organic light-emitting layer 42 to emit light; at the same time, the driving substrate 2 transmits the touch detection signal to the drain 62 and the second metal layer 53 of the control switch 6 to realize the touch function; and the cathode 43 signal and the touch detection signal are blocked by the source 61 and the drain 62 respectively, so as to avoid the occurrence of crosstalk between different electrical signals.

[0067] In response to the display panel switching to the display mode, the control switch 6 is turned on, and the source 61 is electrically connected to the drain 62; the driving substrate 2 transmits the cathode 43 signal to the source 61 and the first metal layer 51 of the control switch 6, and this part of the cathode 43 signal also flows to the drain 62 through the source 61, and then transmits the cathode 43 signal to the second metal layer 53 to reduce the voltage drop of the display panel.

[0068] In other embodiments, the source 61 of the control switch 6 may also be electrically connected to the second metal layer 53, and the drain 62 may be electrically connected to the first metal layer 51. In response to the display panel switching to the touch mode, the control switch 6 is turned off, and the source 61 and the drain 62 are electrically disconnected; the driving substrate 2 transmits the cathode 43 signal to the drain 62 and the first metal layer 51 of the control switch 6 to drive the organic light-emitting layer 42 to emit light; at the same time, the driving substrate 2 transmits the touch detection signal to the source 61 and the second metal layer 53 of the control switch 6 to realize the touch function; and the cathode 43 signal and the touch detection signal are blocked by the source 61 and the drain 62 respectively to avoid crosstalk between different electrical signals.

[0069] In response to the display panel switching to the touch mode, the control switch 6 is turned on, and the source 61 is electrically connected to the drain 62; the driving substrate 2 transmits the cathode 43 signal to the source 61 and the second metal layer 53 of the control switch 6, and this part of the cathode 43 signal also flows to the drain 62 through the source 61, and then transmits the cathode 43 signal to the first metal layer 51 to reduce the voltage drop of the display panel.

[0070] The present application provides a display panel, which has a display mode and a touch mode; the display panel includes a substrate 1, a driving substrate 2, a pixel definition layer 3, a sub-pixel 4 and a suspension structure 5. The driving substrate 2 is arranged on the substrate 1; the pixel definition layer 3 is arranged on the driving substrate 2; the pixel definition layer 3 protrudes from the driving substrate 2 and surrounds a pixel accommodation area 40; the sub-pixel 4 is arranged in the pixel accommodation area 40; the sub-pixel 4 includes an anode 41, an organic light-emitting layer 42 and a cathode 43 stacked in sequence from close to the driving substrate 2 to away from the driving substrate 2. The suspension structure 5 is arranged on the pixel definition layer 3 and protrudes from the pixel accommodation area 40; the suspension structure 5 includes a first metal layer 51, a first insulating layer 52 and a second metal layer 53 stacked in sequence from close to the driving substrate 2 to away from the driving substrate 2; and the first metal layer 51 and the second metal layer 53 are electrically connected to the driving substrate 2 respectively; the first metal layer 51 is arranged in contact with the organic light-emitting layer 42, and the second metal layer 53 is arranged in contact with the cathode 43. In which, in response to the display panel switching to the touch mode, the driving substrate 2 transmits the cathode 43 signal to the organic light-emitting layer 42 through the first metal layer 51, and the driving substrate 2 transmits the touch detection signal to the cathode 43 through the second metal layer 53; in response to the display panel switching to the display mode, the driving substrate 2 transmits the cathode and cathode signals to the cathode 43 through the second metal layer 53. By providing a first metal layer 51 electrically connected to the organic light-emitting layer 42 and a second metal layer 53 electrically connected to the cathode 43 in the overhang structure 5, when the display panel switches to the display mode, the cathode 43 signal is transmitted to the cathode 43 through the second metal layer 53 to drive the organic light-emitting layer 42 to emit light; when the display panel switches to the touch mode, the touch detection signal is transmitted to the cathode 43 through the second metal layer 53 to realize the touch function; at the same time, the cathode 43 signal is transmitted to the organic light-emitting layer 42 through the first metal layer 51 to ensure that the organic light-emitting layer 42 can emit light normally in the touch mode, and an electrical signal shielding is formed between the cathode 43 and the gate 63 wiring and / or the data wiring to reduce the risk of signal transmission of the gate 63 wiring and the data wiring interfering with the touch signal of the cathode 43 and forming noise, thereby avoiding the occurrence of false touch alarm points.

[0071] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel having a display mode and a touch mode; characterized in that: include: substrate; A driving substrate, disposed on the substrate; A pixel definition layer is disposed on the driving substrate; The pixel definition layer protrudes from the driving substrate and surrounds a pixel accommodation area; A sub-pixel is arranged in the pixel accommodating area; the sub-pixel comprises an anode, an organic light-emitting layer and a cathode which are sequentially stacked in a direction from close to the driving substrate to away from the driving substrate; A suspension structure is arranged on the pixel definition layer and protrudes from the pixel accommodating area; the suspension structure comprises a first metal layer, a first insulating layer and a second metal layer stacked in sequence from close to the driving substrate to away from the driving substrate; and the first metal layer and the second metal layer are electrically connected to the driving substrate respectively; The first metal layer is disposed in contact with the organic light-emitting layer, and the second metal layer is disposed in contact with the cathode; A control switch having a source electrode, a drain electrode and a gate electrode electrically connected to the drive substrate respectively; wherein one of the source electrode and the drain electrode is electrically connected to the second metal layer, and the other is electrically connected to the first metal layer; Wherein, in response to the display panel switching to the display mode, the driving substrate transmits a control signal to the gate to open the control switch, so that the first metal layer and the second metal layer are connected in parallel; the driving substrate transmits a cathode signal to the cathode through the second metal layer and transmits a cathode signal to the organic light-emitting layer through the first metal layer; in response to the display panel switching to the touch mode, the driving substrate closes the control switch through the control signal; the driving substrate transmits a cathode signal to the organic light-emitting layer through the first metal layer, and the driving substrate transmits a touch detection signal to the cathode through the second metal layer.

2. The display panel according to claim 1, characterized in that: The source electrode is electrically connected to the first metal layer, and the drain electrode is electrically connected to the second metal layer; the driving substrate transmits a cathode signal to the source electrode; In response to the display panel switching to the touch mode, the driving substrate transmits a touch detection signal to the drain electrode; In response to the display panel switching to the display mode, the driving substrate transmits a cathode signal to the drain.

3. The display panel according to claim 1, characterized in that: The source electrode is electrically connected to the second metal layer, and the drain electrode is electrically connected to the first metal layer; the drive substrate transmits a cathode signal to the drain electrode; In response to the display panel switching to the touch mode, the driving substrate transmits a touch detection signal to the source electrode; In response to the display panel switching to the display mode, the driving substrate transmits a cathode signal to the source electrode.

4. The display panel according to claim 1, characterized in that: The overhanging structure further comprises: The second insulating layer is arranged on a surface of the second metal layer away from the first insulating layer; along a first direction perpendicular to the stacking direction of the display panel, two sides of the second insulating layer protrude from the second metal layer.

5. The display panel according to claim 4, characterized in that: A projection of the second metal layer on the substrate along the stacking direction is located within a projection of the first insulating layer on the substrate along the stacking direction.

6. The display panel according to claim 1, characterized in that: The organic light-emitting layer completely covers the side wall surface of the first metal layer and a portion of the side wall surface of the first insulating layer close to the first metal layer; The cathode completely covers the side wall surface of the second metal layer and a portion of the side wall surface of the first insulating layer close to the second metal layer.

7. The display panel according to claim 1, characterized in that: The first metal layer is arranged around the pixel accommodating area; the projection shape of the first metal layer on the substrate along the stacking direction is one of a circle, a quadrilateral or a hexagon; and a plurality of the first metal layers are interconnected to form a grid structure.

8. The display panel according to claim 1, characterized in that: Also includes: An etching protection layer, covering a surface of the cathode that is away from the organic light-emitting layer and overlapping the second insulating layer of the overhanging structure; A first encapsulation layer, covering a side of the etching protection layer away from the substrate; The second packaging layer is coated on a side of the first packaging layer facing away from the substrate.

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