Display screens and electronic devices

Abstract

The present application discloses a display screen and an electronic device, belonging to the technical field of circuit boards. The display screen includes: a display panel, the display panel includes: a first line; a second line, the second line is arranged opposite to the first line, the voltage on the first line is less than the voltage on the second line; a data signal line, at least partly located between the first line and the second line, used to control the flickering of pixels on the display panel; a hydrogen sensor, arranged on the display panel, corresponding to the data signal line; a driving chip, connected to the hydrogen sensor, used to determine the speed of electrochemical corrosion of the display screen according to the change value of the conduction current of the hydrogen sensor.

Description

Technical Field

[0001] The present application belongs to the technical field of circuit boards, and in particular relates to a display screen and an electronic device. Background Art

[0002] Flexible AMOLED (Active Matrix Organic Light Emitting Diode) displays are gradually being used in scenarios such as human-computer interaction, such as in mobile phones and other communication devices.

[0003] Among them, the circuit in the flexible AMOLED display is printed on a substrate, which contains trace elements such as sulfur. Once the flexible AMOLED display breaks, such as cracks, water vapor will enter the flexible AMOLED display through the cracks, invade the circuit, and form a conductive path with trace elements such as sulfur. In an environment with an electric potential difference, the above-mentioned conductive path will form electrochemical corrosion, and electrochemical corrosion will cause the circuit in the display screen to open, thereby causing vertical lines / black screen / flowered screen problems on the display screen, affecting the service life of the flexible AMOLED display.

[0004] In the related technical solution, a double 85 (temperature 85°C, humidity 85%) test can be used to detect whether the display screen has electrochemical corrosion. However, electrochemical corrosion is not obvious under the double 85 test and is easily ignored during the test, making it impossible to determine whether the display screen has electrochemical corrosion. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a display screen and an electronic device, wherein the display screen can realize self-detection of electrochemical corrosion, thereby solving the problem in related technical solutions that it is impossible to determine whether electrochemical corrosion occurs on the display screen.

[0006] In a first aspect, an embodiment of the present application provides a display screen, comprising: a display panel, the display panel comprising: a first routing line; a second routing line, the second routing line is arranged opposite to the first routing line, and the voltage on the first routing line is less than the voltage on the second routing line; a data signal routing line, at least partially located between the first routing line and the second routing line, and used to control the flashing of pixels on the display panel; a hydrogen sensor, arranged on the display panel, and arranged corresponding to the data signal routing line; a driving chip, connected to the hydrogen sensor, and used to determine the speed of electrochemical corrosion of the display screen according to the change value of the conduction current of the hydrogen sensor.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, including: a display screen as described in any of the above items.

[0008] In an embodiment of the present application, a display screen is proposed, wherein the display screen includes a display panel, a hydrogen sensor, and a driving chip connected to the hydrogen sensor.

[0009] Specifically, the first and second wirings in the display panel can realize the transmission of power supply signals, and also form a potential difference between the first and second wirings. In the case of a crack in the display screen, water vapor entering the display panel, the data signal wiring and trace elements such as sulfur in the display panel form a conductive path. Under the action of the potential difference formed between the first and second wirings, the above conductive path will form electrochemical corrosion. In the case of electrochemical corrosion, hydrogen will appear near the first wiring, and the concentration change of hydrogen is positively correlated with the speed of electrochemical corrosion, that is, the higher the concentration of hydrogen, the faster the speed of electrochemical corrosion. The hydrogen sensor can detect the concentration of hydrogen and characterize it using the current when the hydrogen sensor is turned on, so that the driver chip can know the speed of electrochemical corrosion.

[0010] In the above embodiment, the display screen can autonomously detect whether electrochemical corrosion occurs, and use the change in the conduction current of the hydrogen sensor to characterize the speed of electrochemical corrosion, thereby solving the problem in related technical solutions that it is impossible to determine whether electrochemical corrosion occurs on the display screen.

[0011] In addition, in the above embodiment, the speed of electrochemical corrosion can be used to evaluate the service life of the display screen, thereby reducing the impact of electrochemical corrosion on the user experience of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of a display panel in an embodiment of the present application;

[0013] Figure 2 It is a connection diagram of the hydrogen sensor, the first wiring, the second wiring, the data signal wiring and the driver chip in the embodiment of the present application;

[0014] Figure 3 It is one of the schematic diagrams of the principle of electrochemical corrosion in the embodiment of the present application;

[0015] Figure 4 This is the second schematic diagram of the principle of electrochemical corrosion in the embodiment of the present application;

[0016] Figure 5 is a schematic diagram of the operating parameters of the hydrogen sensor in the embodiment of the present application;

[0017] Figure 6 It is a schematic diagram of the positions of the hydrogen sensor, the first wiring, the second wiring, the data signal wiring and the driver chip in the embodiment of the present application;

[0018] Figure 7 It is a schematic diagram of the structure of the hydrogen sensor in the embodiment of the present application.

[0019] in, Figure 1 , Figure 2 and Figure 6 The corresponding relationship between the reference numerals and component names in the figure is:

[0020] 100 display panel, 102 first wiring, 104 second wiring, 106 data signal wiring, 108 hydrogen sensor, 110 driver chip, 1002 first inorganic layer, 1004 second inorganic layer, 1006 organic layer, 1008 supporting layer, 1010 control wiring, 202 hydrogen, 204 crack. DETAILED DESCRIPTION

[0021] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0022] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] The display screen and electronic device provided in the embodiments of the present application are described below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0026] In one embodiment, if Figure 1 , Figure 2 and Figure 6 As shown, an embodiment of the present application provides a display screen, including: a display panel 100, the display panel 100 includes: a first wiring 102; a second wiring 104, the second wiring 104 is arranged opposite to the first wiring 102, and the voltage on the first wiring 102 is less than the voltage on the second wiring 104; a data signal wiring 106, at least partially located between the first wiring 102 and the second wiring 104, for controlling the flickering of pixels on the display panel 100; a hydrogen sensor 108, arranged on the display panel 100, corresponding to the data signal wiring 106; a driving chip 110, connected to the hydrogen sensor 108, for determining the speed of electrochemical corrosion of the display screen according to the change value of the conduction current of the hydrogen sensor 108.

[0027] In an embodiment of the present application, a display screen is provided, wherein the display screen includes a display panel 100 , a hydrogen sensor 108 , and a driving chip 110 connected to the hydrogen sensor 108 .

[0028] Specifically, the first wiring 102 and the second wiring 104 in the display panel 100 can realize the transmission of the power supply signal, and also form a potential difference between the first wiring 102 and the second wiring 104. When the display screen is broken, that is, the crack 204, the water vapor entering the display panel 100, the data signal wiring 106 and the trace elements such as sulfur in the display panel 100 form a conductive path. Under the action of the potential difference formed between the first wiring 102 and the second wiring 104, the above conductive path will form electrochemical corrosion. In the case of electrochemical corrosion, hydrogen 202 will appear near the first wiring 102, and the change in hydrogen concentration is positively correlated with the speed of electrochemical corrosion, that is, the higher the concentration of hydrogen, the faster the speed of electrochemical corrosion, and the hydrogen sensor 108 can detect the concentration of hydrogen and characterize it using the current when the hydrogen sensor 108 is turned on, so that the driver chip 110 can know the speed of electrochemical corrosion.

[0029] In the above embodiment, the display screen can autonomously detect whether electrochemical corrosion occurs, and use the change in the conduction current of the hydrogen sensor 108 to characterize the speed of electrochemical corrosion, thereby solving the problem in related technical solutions that it is impossible to determine whether electrochemical corrosion occurs on the display screen.

[0030] In addition, in the above embodiment, the speed of electrochemical corrosion can be used to evaluate the service life of the display screen, thereby reducing the impact of electrochemical corrosion on the user experience of the electronic device.

[0031] In one embodiment, the distribution of hydrogen sensors 108 is used to achieve accurate positioning of electrochemical corrosion, so as to estimate the service life of the display screen based on the electrochemical corrosion situation.

[0032] It is worth pointing out that when the display screen is cracked, water vapor invades the display panel 100, but when no electrochemical corrosion occurs, it will not affect the service life of the display screen. Obviously, the presence of water vapor intrusion is not a sufficient condition for the occurrence of electrochemical corrosion, and the above-mentioned embodiment of the present application can eliminate the above-mentioned situation, thereby improving the recognition accuracy of electrochemical corrosion.

[0033] Among them, electrochemical corrosion is divided into two stages, namely the incubation period and the growth period:

[0034] like Figure 3 As shown, during the incubation period: electrons move from the anode 302 to the cathode 304 through the guide. At this time, the current formed is opposite to the moving direction of the electrons. In the medium 310, the metal M on the anode 302 dissolves and loses electrons to become a cation M 2+ , the cathode 304 water obtains electrons to form hydrogen 306 and hydroxide ions OH- ; Then due to the potential difference, the cation M 2+ Moving toward cathode 304, hydroxide ions OH - moves toward the anode 302, but due to the cation M 2+ The weight is much greater than the hydroxide ion OH - , so the precipitate 308 / corrosion products will form at a location with high potential close to the anode 302.

[0035] Specifically, the chemical reaction formed at the anode 302 is expressed as follows:

[0036] M-2e→M 2+ ;

[0037] The chemical reaction formed at cathode 304 is expressed as follows:

[0038] 2H2O+2e→H2↑+2OH - ;

[0039] Under the action of the electric field, the anions and cations move in a directional manner, and the anions and cations form the following chemical reactions:

[0040] M 2+ +2OH - →M(OH)2;M(OH)2→M 2+ +OH - .

[0041] like Figure 4 As shown, during the growth period: as the electrochemical corrosion progresses, the cation M 2+ Gradually moves to the vicinity of the cathode 304, directly gains electrons and is reduced to metal M. At this time, dendrites gradually grow from the cathode 304 to the anode 302; at the same time, water still gains electrons at the cathode 304 to form hydrogen 306 and hydroxide ions OH - .

[0042] Specifically, the chemical reaction formed at the anode 302 is expressed as follows:

[0043] M-2e→M 2+ ;

[0044] The chemical reaction formed at cathode 304 is expressed as follows:

[0045] 2H2O+2e→H2↑+2OH - ;M 2+ +2e→M.

[0046] From the above, we can see that the generation of hydrogen is an inevitable phenomenon of electrochemical corrosion, so the presence of electrochemical corrosion can be identified by detecting the concentration of hydrogen.

[0047] like Figure 5 As shown, the IV (current-voltage curve) curve of the thin-film transistor of the hydrogen sensor 108 changes as the hydrogen concentration increases, so the amount of hydrogen produced can be determined based on the size of the on-current, and the hydrogen production rate can be known based on the change in the on-current, wherein the hydrogen production rate is positively correlated with the rate of electrochemical corrosion.

[0048] In one embodiment, the hydrogen sensor 108 is located between the first trace 102 and the second trace 104 , and close to a side of the first trace 102 .

[0049] In this embodiment, the location of the hydrogen sensor 108 is specifically defined. As can be seen from the above, the metal molecules in the data signal wiring 106 will lose electrons, form cations, and move to a position with low potential, and generate hydrogen at the position with low potential, wherein the position with low potential is also the position where the first wiring 102 is located. Therefore, by arranging the hydrogen sensor 108 between the first wiring 102 and the second wiring 104 and on a side close to the first wiring 102, the hydrogen sensor 108 can detect the hydrogen generated near the first wiring 102 in time, thereby realizing rapid identification of electrochemical corrosion.

[0050] In addition, since hydrogen is generated near the first wiring 102, the hydrogen sensor 108 can be set at a position close to the first wiring 102, and there is no need to set the hydrogen sensor 108 at other positions, thereby reducing the number of hydrogen sensors 108 to be set, thereby reducing the manufacturing difficulty and manufacturing cost of the display screen.

[0051] In one embodiment, there are multiple hydrogen sensors 108 , and the multiple hydrogen sensors 108 are arranged at intervals along the extension direction of the first wiring 102 .

[0052] In this embodiment, the range of hydrogen detected by a single hydrogen sensor 108 is limited, and the number of hydrogen sensors 108 is limited to multiple so that the distribution arrangement of multiple hydrogen sensors 108 can be used to display the detection of electrochemical corrosion in a larger area on the screen.

[0053] In addition, as can be seen above, hydrogen will be generated at locations with lower electric potential. By limiting the intervals along the extension direction of the first wiring 102, all locations where hydrogen may be generated can be detected for electrochemical corrosion. In this way, when electrochemical corrosion occurs, electrochemical corrosion can be discovered in time, and the location where electrochemical corrosion occurs can be accurately detected based on the distribution of multiple hydrogen sensors 108, thereby achieving precise positioning of the electrochemical corrosion location.

[0054] In one embodiment, there are multiple data signal lines 106 , the multiple data signal lines 106 have multiple intersections with the first line 102 , and the multiple hydrogen sensors 108 are disposed at intervals in the multiple intersections.

[0055] As can be seen from the above, electrochemical corrosion in the display screen is that the molecules in the data signal line 106 lose electrons to form cations, and the cations will move toward the first line 102 to form dendrites. Obviously, when electrochemical corrosion occurs, hydrogen is easily generated at the intersection between the data signal line 106 and the first line 102. By limiting the arrangement of multiple hydrogen sensors 108 at intervals in multiple intersections, rapid identification of electrochemical corrosion can be achieved.

[0056] By limiting the interval arrangement, the number of hydrogen sensors 108 is reduced, thereby reducing the manufacturing difficulty and manufacturing cost of the display screen.

[0057] In one embodiment, the distance between two adjacent hydrogen sensors 108 is positively correlated with the sensitivity of the hydrogen sensor 108 .

[0058] In this embodiment, the distance between two adjacent hydrogen sensors 108 can be selected according to actual use requirements, such as providing a hydrogen sensor 108 at intervals of 200 um to 1000 um.

[0059] In one embodiment, the display panel 100 includes: a first inorganic layer 1002; a second inorganic layer 1004, which is arranged opposite to the first inorganic layer 1002; and an organic layer 1006, which is located between the first inorganic layer 1002 and the second inorganic layer 1004, and the organic layer 1006 is printed or evaporated with a first wiring 102, a second wiring 104, a data signal wiring 106 and a hydrogen sensor 108.

[0060] In this embodiment, the detailed structure of the display panel 100 is specifically defined. Specifically, the display panel 100 includes a first inorganic layer 1002, an organic layer 1006 and a second inorganic layer 1004. The organic layer 1006 is located between the first inorganic layer 1002 and the second inorganic layer 1004. The first inorganic layer 1002 plays a role in protecting the organic layer 1006. When cracks appear on the display screen, the first inorganic layer 1002 breaks, and the second inorganic layer 1004 is used as a substrate to form the first wiring 102, the second wiring 104, the data signal wiring 106 and the hydrogen sensor 108 by printing or evaporation to form the organic layer 1006.

[0061] In one embodiment, the second inorganic layer 1004 is a polyimide substrate, such as a polyimide film.

[0062] In one embodiment, the display panel 100 further includes: a support layer 1008 , which is laminated to the first inorganic layer 1002 and is located on a side away from the organic layer 1006 .

[0063] In this embodiment, the support layer 1008 is provided so as to support the display panel 100 and keep it in a stable state. At the same time, the provision of the support layer 1008 also plays a role in protecting the display panel 100, thereby reducing the probability of cracks on the display screen, thereby ensuring the service life of the display screen.

[0064] In one embodiment, the support layer 1008 is a transparent support layer 1008 , so that the light output by the display panel 100 can be output through the support layer 1008 .

[0065] In one embodiment, the support layer 1008 is an organic layer.

[0066] In one embodiment, the display panel 100 further includes: a control wiring 1010; the hydrogen sensor 108 has a first end, a second end and a control end, the first end and the second end are connected to the driving chip 110, and the control end is connected to the control wiring 1010, which is used to control the conduction of the hydrogen sensor 108. When the hydrogen sensor 108 is in conduction, the first end is connected to the second end.

[0067] In this embodiment, the detailed connection structure of the hydrogen sensor 108 is specifically defined, and the control line 1010 is set to control whether the hydrogen sensor 108 is turned on. When the hydrogen sensor 108 is turned on, the first end is connected to the second end, and the hydrogen sensor 108 can control the magnitude of the conduction current flowing through the hydrogen sensor 108 under different hydrogen concentrations.

[0068] Specifically, Figure 7 As shown, the structure of the hydrogen sensor 108 includes: a stacked substrate 702, gallium nitride 704, a two-dimensional electron gas 706, aluminum gallium nitride 708, and an ohmic electrode 710 and a hydrogen-sensitive platinum electrode 712 disposed on the aluminum gallium nitride 708. The hydrogen molecules are firstly split into hydrogen atoms on the surface of the platinum electrode 712, and then diffuse through the platinum to reach the interface of the aluminum gallium nitride 708 to form a dipole layer. This dipole layer will reduce the height of the Schottky barrier, which is equivalent to reducing the absolute value of the negative bias voltage applied, thereby increasing the concentration of the two-dimensional electron gas 706 and obtaining a larger current.

[0069] In one embodiment, when there are multiple hydrogen sensors 108 , the multiple hydrogen sensors 108 share the control trace 1010 .

[0070] In one embodiment, the hydrogen sensor 108 is located at a location in the display screen where the potential difference is large and electrochemical corrosion is likely to occur.

[0071] In this embodiment, multiple hydrogen sensors 108 share the control wiring 1010 to reduce the number of control wirings 1010 to be laid out, thereby reducing the manufacturing difficulty of the display screen. At the same time, since the manufacturing difficulty of the display screen is reduced, the yield rate of the display screen is improved.

[0072] In one of the embodiments, an electronic device is provided, wherein the electronic device includes a display screen as described in any of the above embodiments.

[0073] In an embodiment of the present application, an electronic device is provided, which uses the above-mentioned display screen, wherein the display screen includes a display panel 100 , a hydrogen sensor 108 , and a driving chip 110 connected to the hydrogen sensor 108 .

[0074] Specifically, the first wiring 102 and the second wiring 104 in the display panel 100 can realize the transmission of the power supply signal, and also form a potential difference between the first wiring 102 and the second wiring 104. In the case of a crack in the display screen, the water vapor entering the display panel 100, the data signal wiring 106 and the trace elements such as sulfur in the display panel 100 form a conductive path. Under the action of the potential difference formed between the first wiring 102 and the second wiring 104, the above conductive path will form electrochemical corrosion. In the case of electrochemical corrosion, hydrogen will appear near the first wiring 102, and the change in hydrogen concentration is positively correlated with the speed of electrochemical corrosion, that is, the higher the concentration of hydrogen, the faster the speed of electrochemical corrosion, and the hydrogen sensor 108 can detect the concentration of hydrogen and characterize it using the current when the hydrogen sensor 108 is turned on, so that the driver chip 110 can know the speed of electrochemical corrosion.

[0075] In the above embodiment, the display screen can autonomously detect whether electrochemical corrosion occurs, and use the change in the conduction current of the hydrogen sensor 108 to characterize the speed of electrochemical corrosion, thereby solving the problem in related technical solutions that it is impossible to determine whether electrochemical corrosion occurs on the display screen.

[0076] In addition, in the above embodiment, the speed of electrochemical corrosion can be used to evaluate the service life of the display screen, thereby reducing the impact of electrochemical corrosion on the user experience of the electronic device.

[0077] In one embodiment, the distribution of hydrogen sensors 108 is used to achieve accurate positioning of electrochemical corrosion, so as to estimate the service life of the display screen based on the electrochemical corrosion situation.

[0078] It is worth pointing out that when the display screen is cracked, water vapor invades the display panel 100, but when no electrochemical corrosion occurs, it will not affect the service life of the display screen. Obviously, the presence of water vapor intrusion is not a sufficient condition for the occurrence of electrochemical corrosion, and the above-mentioned embodiment of the present application can eliminate the above-mentioned situation, thereby improving the recognition accuracy of electrochemical corrosion.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A display screen, characterized in that: include: A display panel, the display panel comprising: First route; a second wiring, the second wiring being arranged opposite to the first wiring, and a voltage on the first wiring being lower than a voltage on the second wiring; A data signal wiring, at least partially located between the first wiring and the second wiring, for controlling the flickering of pixels on the display panel; A hydrogen sensor is disposed on the display panel and is arranged corresponding to the data signal wiring; The driving chip is connected to the hydrogen sensor and is used to determine the speed of electrochemical corrosion of the display screen according to the change value of the conduction current of the hydrogen sensor.

2. The display screen according to claim 1, characterized in that: The hydrogen sensor is located between the first wiring and the second wiring and on a side close to the first wiring.

3. The display screen according to claim 2, characterized in that: There are a plurality of hydrogen sensors, and the plurality of hydrogen sensors are arranged at intervals along the extending direction of the first wiring.

4. The display screen according to claim 3, characterized in that: There are multiple data signal routing lines, and the multiple data signal routing lines have multiple intersections with the first routing line. The multiple hydrogen sensors are arranged at intervals in the multiple intersections.

5. The display screen according to claim 3, characterized in that: The distance between two adjacent hydrogen sensors is positively correlated with the sensitivity of the hydrogen sensors.

6. The display screen according to any one of claims 1 to 5, characterized in that: The display panel comprises: a first inorganic layer; a second inorganic layer, arranged opposite to the first inorganic layer; The organic layer is located between the first inorganic layer and the second inorganic layer, and the first wiring, the second wiring, the data signal wiring and the hydrogen sensor are printed or evaporated on the organic layer.

7. The display screen according to claim 6, characterized in that: The display panel further includes: The support layer is disposed in contact with the first inorganic layer and is located on a side away from the organic layer.

8. The display screen according to any one of claims 1 to 5, characterized in that: The display panel further includes: Control routing; The hydrogen sensor has a first end, a second end and a control end. The first end and the second end are connected to the driving chip. The control end is connected to the control wiring and is used to control the conduction of the hydrogen sensor. When the hydrogen sensor is in conduction, the first end is connected to the second end.

9. The display screen according to claim 8, characterized in that: When there are multiple hydrogen sensors, the multiple hydrogen sensors share the control wiring.

10. An electronic device, characterized in that: include: A display screen as claimed in any one of claims 1 to 9.

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