Display device

Abstract

The application discloses a display device, which comprises a piezoelectric layer, an electric unit, a control switch and a battery module, the piezoelectric layer is arranged in a folding area of the display device, and is used for converting mechanical energy of bending into electric energy when the display device is bent; the electric unit is connected with the piezoelectric layer, and the electric unit is powered when the piezoelectric layer generates electric energy; the control switch is connected with the electric unit, and is used for being turned off when the piezoelectric layer generates electric energy and being turned on when the piezoelectric layer does not generate electric energy; the battery module is connected with the control switch, and is used for powering the electric unit when the control switch is turned on; the application provides electric energy for the folding display panel by converting mechanical energy into electric energy in the folding process, so that the power consumption of the display panel is reduced.

Description

Technical Field

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

[0002] Currently, flexible OLED (Organic Light-Emitting Diode) display panels are attracting increasing attention. Flexible OLED refers to screens that can undergo various deformations, such as rolling, stretching, or folding. With the continuous upgrading of mobile phones, people's requirements for mobile phone screens are also increasing. There is a demand for both portability and larger screens. Therefore, foldable screen phones are becoming increasingly popular among users.

[0003] However, foldable screens currently suffer from the drawback of short battery life, and those skilled in the art urgently need to solve this problem. Summary of the Invention

[0004] The purpose of this application is to provide a display device that provides electrical energy to a foldable display panel by converting the mechanical energy of the foldable display panel into electrical energy during the folding process, thereby reducing the power consumption of the display panel.

[0005] This application discloses a display device, which includes a piezoelectric layer, a power-consuming unit, a control switch, and a battery module. The piezoelectric layer is disposed within the folding area of ​​the display device and is used to convert the mechanical energy of bending into electrical energy when the display device is bent. The power-consuming unit is connected to the piezoelectric layer and supplies power to the power-consuming unit when the piezoelectric layer generates electrical energy. The control switch is connected to the power-consuming unit and is used to disconnect when the piezoelectric layer generates electrical energy and to conduct when the piezoelectric layer does not generate electrical energy. The battery module is connected to the control switch and is used to supply power to the power-consuming unit when the control switch is on.

[0006] Optionally, the folded area bends along a first direction under the action of an external force, and the piezoelectric layer is arranged along the first direction; the display device further includes a display panel, and the piezoelectric layer is disposed on the surface of the display panel and / or the bottom surface of the display panel.

[0007] Optionally, the display device further includes an amplification circuit connected between the piezoelectric layer and the power-consuming unit, used to amplify the current generated by the piezoelectric layer.

[0008] Optionally, the amplification circuit includes an amplifier, a first resistor, a second resistor, and a third resistor. The first resistor and the second resistor are connected in series. The end of the first resistor away from the second resistor is connected to the first input terminal of the amplifier. One end of the third resistor is connected to the second input terminal of the amplifier, and the other end of the third resistor is connected to the output terminal of the amplifier. The first input terminal of the amplifier is connected to the piezoelectric layer. The output terminal of the amplifier is connected to the power-consuming unit.

[0009] Optionally, the control switch is further provided with an electro-expansion structure connected to the piezoelectric layer. The electro-expansion structure expands when the piezoelectric layer generates electrical energy. During expansion, the electro-expansion structure controls the control switch to be in an open state, disconnecting the battery module from the power-consuming unit. When the piezoelectric layer does not generate electrical energy, the electro-expansion structure contracts, the control switch is in a closed state, and the battery module is connected to the power-consuming unit.

[0010] Optionally, the control switch is further provided with an elastic structure, which is used to keep the control switch in a conducting state when the electro-expansion structure contracts.

[0011] Optionally, the display device further includes a capacitor circuit connected to a first node, which is disposed between the amplifier circuit and the power-consuming unit.

[0012] Optionally, the capacitor circuit includes a first capacitor, one end of which is connected to the first node, and the other end of which is grounded.

[0013] Optionally, the power unit may include a Bluetooth chip or a radio frequency chip.

[0014] Optionally, the display device includes a driving circuit board and a display panel, wherein the driving circuit board is used to drive the display panel to display; the power supply unit, the control switch, and the battery module are respectively disposed on the driving circuit board.

[0015] This application incorporates a piezoelectric layer within the folding area of ​​a display device. When the display device is bent, the piezoelectric layer converts the mechanical energy generated during the bending process into electrical energy, which is then used to power the power-consuming units. When the display device is not folded, it is still powered by a battery module. However, when the display device is folded or folded multiple times, the power-consuming units can be switched to a power source generated by the piezoelectric layer. This utilizes the mechanical energy generated during folding to power the power-consuming units, reducing their dependence on the battery module and addressing the current issue of insufficient power in display devices. Furthermore, this application directly uses the electrical energy generated by the piezoelectric layer to power the power-consuming units, eliminating the need to charge the battery. This reduces energy loss in intermediate stages, further improving the utilization rate of the electrical energy generated by the piezoelectric layer, thereby reducing the power consumption of the display device and enhancing user satisfaction. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0017] Figure 1 This is a folded schematic diagram of the display device according to the first embodiment of this application;

[0018] Figure 2 This is a schematic diagram of a display device according to the first embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the piezoelectric layer of this application;

[0020] Figure 4 This is a schematic diagram of the amplifier circuit of this application;

[0021] Figure 5 This is a schematic diagram of the conduction state of the control switch of the display device according to the second embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the control switch of the display device in the open state according to the second embodiment of this application;

[0023] Figure 7 This is a schematic diagram of a display device according to the third embodiment of this application.

[0024] Among them, 100 is a display device; 101 is a folding area; 110 is a display panel; 111 is a top surface; 112 is a bottom surface; 120 is a piezoelectric layer; 130 is a drive circuit board; 140 is a power consumption unit; 150 is a control switch; 151 is an electro-expansion structure; 152 is a switch connection part; 153 is an elastic structure; 160 is a battery module; 170 is an amplifier circuit; 171 is an amplifier; 172 is a capacitor circuit; C1 is a first capacitor; R1 is a first resistor; R2 is a second resistor; R3 is a third resistor; x is a first direction. Detailed Implementation

[0025] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0026] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "vertical," and "horizontal," are described based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0028] Figure 1 This is a folded schematic diagram of the display device according to the first embodiment of this application. Figure 2 This is a schematic diagram of the display device according to the first embodiment of this application, see below. Figure 1-2As shown, this application discloses a display device 100, which includes a piezoelectric layer 120, a power-consuming unit 140, a control switch 150, and a battery module 160. The piezoelectric layer 120 is disposed within the folding region 101 of the display device 100 and is used to convert the mechanical energy of bending into electrical energy when the display device 100 is bent. The power-consuming unit 140 is connected to the piezoelectric layer 120 and supplies power to the power-consuming unit 140 when the piezoelectric layer 120 generates electrical energy. The control switch 150 is connected to the power-consuming unit 140 and is used to disconnect when the piezoelectric layer 120 generates electrical energy and to connect when the piezoelectric layer 120 does not generate electrical energy. The battery module 160 is connected to the control switch 150 and supplies power to the power-consuming unit 140 when the control switch 150 is connected.

[0029] This application provides a piezoelectric layer 120 within the folding area 101 of the display device 100. When the display device 100 is bent, the piezoelectric layer 120 converts the mechanical energy generated during the bending process into electrical energy, which is then used to power the power-consuming unit 140. When the display device 100 is not folded, it is still powered by the battery module 160. However, when the display device 100 is folded or folded multiple times, the power-consuming unit 140 can be switched to a power source generated by the voltage layer. This allows the mechanical energy of the folding process to be used to power the power-consuming unit 140, reducing the power-consuming unit 140's dependence on the battery module 160 and solving the current problem of insufficient power in the display device 100. Furthermore, this application utilizes the electrical energy generated by the piezoelectric layer 120 to directly power the power-consuming unit 140, instead of charging the battery and having the battery power the power-consuming unit 140. This reduces the energy loss in the intermediate links, further improves the utilization rate of the electrical energy generated by the piezoelectric layer 120, thereby reducing the power consumption of the display device 100 and improving the user satisfaction of the display device 100.

[0030] It is understood that the power-consuming unit 140 in this application is generally a low-power power-consuming unit 140, which consumes relatively low power itself, but still consumes a certain amount of power during continuous use. Examples include Bluetooth chips, RF chips, and ambient lights. Chips of this type, represented by Bluetooth chips and RF chips, generally account for less than or equal to 5% of the total power consumption in the display device 100. For Bluetooth chips, when the Bluetooth chip is working or connected in low-power mode, the power generated by folding is used to power the Bluetooth chip, especially when the Bluetooth chip enters a low-power connected state or a disconnected state. For RF chips, RF chips do not need to work continuously, but only need to transmit or receive RF signals intermittently. The low-power mode of the Bluetooth chip in the disconnected state can also be intermittent signal transmission. In this mode, it can be directly powered by the power generated by folding. When the Bluetooth chip or RF chip is in low-power mode, it is powered by the power generated by the piezoelectric layer 120. When the Bluetooth chip or RF chip is in normal working mode, it is powered by the battery module 160.

[0031] Figure 3 This is a schematic diagram of the piezoelectric layer of this application, see [link / reference]. Figure 3 As shown, the process by which the piezoelectric layer 120 converts mechanical energy into electrical energy includes the deformation of the piezoelectric material in the piezoelectric layer 120 under the action of an external force when a pressure F is applied to the piezoelectric material. This external force can be, for example, the force that compresses the piezoelectric material when the display device 100 of this application is folded, or it can be a force generated by external pressure. When pressure is applied to the piezoelectric material, a potential difference is generated, thereby discharging. This process is a positive piezoelectric effect, see [link to relevant documentation]. Figure 3 Left. Of course, the piezoelectric material in this embodiment also includes inverse conversion; see [link to relevant documentation]. Figure 3 On the right, the piezoelectric material converts electrical energy into mechanical energy. When an electric field E is applied to the piezoelectric material, it releases mechanical energy, causing it to deform. In other words, the piezoelectric material has the function of converting and reversing between mechanical and electrical energy. This embodiment mainly utilizes the positive piezoelectric effect, that is, through the reciprocating action of external force, the folding area 101 of the display device 100 can be continuously bent at different angles and with different forces, thereby causing the piezoelectric layer 120 to continuously deform and generate electrical energy to power the power-consuming unit 140.

[0032] In this embodiment, the piezoelectric material can be a piezoelectric ceramic. The piezoelectric layer 120 also includes electrode layers disposed on both sides of the piezoelectric ceramic. The electrode layers on both sides can be metal thin films, including one or more materials selected from gold, silver, copper, nickel or nobile.

[0033] See also Figure 1-2As shown, the display device 100 also includes a display panel 110. In this embodiment, the piezoelectric layer 120 can be disposed on the bottom surface 112 of the display panel 110. The bottom surface 112 of the display panel 110 refers to the side of the display panel 110 that does not emit light, while the top surface 111 of the display panel 110 is the side that emits light. The bottom surface 112 and the top surface 111 are two opposite surfaces.

[0034] The display panel 110 mainly includes a pixel driving layer, an array of light-emitting unit layers, an encapsulation layer, and other multilayer film layers for display, all disposed on the light-emitting side of the display substrate. It is understood that the foldable display device 100 also requires display in the folded area 101.

[0035] In this embodiment, the piezoelectric layer 120 can be disposed on the bottom surface 112 of the display panel 110. Since the bottom surface 112 does not emit light, the piezoelectric layer 120 does not affect the normal light emission of the display panel 110. Of course, in order to increase the amount of electricity generated each time the display panel 110 is folded, the piezoelectric layer 120 can also be disposed on both the top surface 111 and the bottom surface 112 of the display panel 110. By disposing the piezoelectric layer 120 on both sides, the amount of electricity generated during a single fold can be increased, thereby extending the power supply duration to the power-consuming unit 140.

[0036] For the top surface 111, the light-emitting surface, of the display panel 110, the piezoelectric layer 120 needs to not affect the normal display of the display panel 110. Generally, it needs to be located in the non-opening area within the folded area 101. The amount of light emitted from this non-opening area is small, and generally no light is emitted. Of course, in this embodiment, the piezoelectric layer 120 can also be located separately on the light-emitting surface of the display panel 110. The specific design can be made according to the actual situation, and will not be elaborated here.

[0037] The folded region 101 bends along a first direction x under the action of external force, and the piezoelectric layer 120 is arranged along the first direction x. The folded region 101 includes a folding axis, and the display device 100 folds inward or outward along this folding axis. The folding axis does not actually exist on the display device 100. Generally, the display device 100 is not folded like paper. The folded region 101 is generally an arc or curved surface, and there will not be two completely parallel surfaces that would result in a folding axis. This folding axis refers to a virtual dividing line that stretches in different directions when gradually bending along both sides of the folding axis.

[0038] The display device 100 also includes a driver circuit board 130, which drives the display panel 110 for display. The driver circuit board 130 generally includes a timing controller, a data chip, etc. Generally, the driver circuit board 130 needs to be connected to the display panel 110 by bonding. The power consumption unit 140, the control switch 150, and the battery module 160 are respectively disposed on the driver circuit board 130.

[0039] The connection traces between the piezoelectric layer 120 and the power-consuming unit 140 can be connected to the bonding area via the non-display area of ​​the display panel 110 or from the side of the display panel 110. They are then connected to the driver circuit board 130 via bonding or external connection. The aforementioned Bluetooth chip, RF chip, etc., can be mounted on the driver circuit board 130. Similarly, the power-consuming units 140 mounted on the display panel 110, including breathing lights, ambient lights, etc., also need to be connected to the breathing lights or ambient lights via connecting wires from the piezoelectric layer 120 of the display panel 110. The specific wiring method can be designed according to the actual situation.

[0040] Figure 4 This is a schematic diagram of the amplifier circuit of this application, see [link / reference]. Figure 4 As shown, in this embodiment, considering that the current directly generated by the piezoelectric layer 120 is relatively small, the current generated by the piezoelectric layer 120 can be directly amplified and transmitted to the power-consuming unit 140 by setting an amplification circuit 170. The display device 100 also includes an amplification circuit 170, which is connected between the piezoelectric layer 120 and the power-consuming unit 140, and is used to amplify the current generated by the piezoelectric layer 120.

[0041] The amplifier circuit 170 is disposed on the driver circuit board 130. By disposing the amplifier circuit 170 on the driver circuit board 130, it has the advantage of low cost, which can reduce the manufacturing cost of forming it on the substrate of the display panel 110.

[0042] In this embodiment, considering that the voltage or current generated by the piezoelectric layer 120 may be low, which may result in the inability to drive the power-consuming unit 140 or to drive multiple power-consuming units 140 at the same time, the current is amplified by the amplifier circuit 170 and then transmitted to the power-consuming unit 140 so that the power-consuming unit 140 can work normally.

[0043] The amplifier circuit 170 includes an amplifier 171, a first resistor R1, a second resistor R2, and a third resistor R3. The first resistor R1 and the second resistor R2 are connected in series. The end of the first resistor R1 away from the second resistor R2 is connected to the first input terminal of the amplifier 171. One end of the third resistor R3 is connected to the second input terminal of the amplifier 171, and the other end of the third resistor R3 is connected to the output terminal of the amplifier 171. The first input terminal of the amplifier 171 is connected to the piezoelectric layer 120. The output terminal of the amplifier 171 is connected to the power consumption unit 140.

[0044] In this embodiment, an amplifier 171 is added between the piezoelectric layer 120 and the power-consuming unit 140 to amplify the current. The amplified current is used to drive the power-consuming unit 140, enabling the low-power power-consuming unit 140 to operate even when the piezoelectric layer 120 is directly connected to the power-consuming unit 140. Directly connecting the piezoelectric layer 120 to the power-consuming unit 140 provides power to the unit 140. Compared to storing electrical energy in a battery and having the battery power the unit 140, this reduces the losses associated with the piezoelectric layer 120 converting mechanical energy into electrical energy and the current transfer from the piezoelectric layer 120 to the battery and then to the power-consuming unit 140. The number and resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 can be selected according to actual conditions, such as the size of the display panel 110 and the current requirements of the low-power power-consuming unit 140.

[0045] Figure 5 This is a schematic diagram showing the on / off state of the control switch of the display device according to the second embodiment of this application. Figure 6 This is a schematic diagram showing the open state of the control switch of the display device according to the second embodiment of this application. See also: Figure 5-6 As shown, this application further designs the control switch 150. Since the control switch 150 controls the power supply terminal of the power consumption unit 140 to switch between the piezoelectric layer 120 and the battery module 160, the battery module 160 continuously supplies power to the power consumption unit 140 when the piezoelectric layer 120 does not generate electricity.

[0046] Specifically, the control switch 150 is further provided with an electro-expansion structure 151, which is connected to the piezoelectric layer 120. When the piezoelectric layer 120 generates electrical energy, it expands. The electro-expansion structure 151 is used to control the control switch 150 to be in an open state during expansion, thus disconnecting the battery module 160 from the power consumption unit 140. When the piezoelectric layer 120 does not generate electrical energy, the electro-expansion structure 151 contracts, the control switch 150 is in a conducting state, and the battery module 160 is connected to the power consumption unit 140.

[0047] In this embodiment, an electro-expansion structure 151 is provided in the control switch 150. The electro-expansion structure 151 expands under voltage excitation, and the control switch 150 is disconnected through expansion deformation. This allows the display device 100 to generate electrical energy during folding. This electrical energy is first transferred to the electro-expansion structure 151, causing it to expand and open the switch connection part 152 in the control switch 150, thus disconnecting the control switch 150. This disconnects the battery module 160 from the power consumption unit 140, and the power consumption unit 140 is no longer powered by the battery module 160 but by the piezoelectric layer 120. When the piezoelectric layer 120 no longer generates electrical energy, the electro-expansion layer stops expanding, causing the switch connection part 152 in the control switch 150 to reconnect, reconnecting the battery module 160 and the power consumption unit 140, and restoring power supply from the power consumption unit 140.

[0048] In one embodiment, the electro-expansion structure 151 can also be formed using the piezoelectric material described above, mainly utilizing the reverse reaction of the piezoelectric material, that is, expansion and deformation under voltage. Unlike the piezoelectric layer 120 described above, the electro-expansion structure 151 has a smaller volume and requires only a very small amount of electrical energy to drive the control switch 150. Of course, the electro-expansion structure 151 can also be formed using other electro-expansion materials, such as electrothermal deformable materials. These materials do not expand directly under electrical energy, but convert electrical energy into heat energy, indirectly causing the material to expand due to temperature changes, so as to use the control switch 150 to achieve conduction and disconnection.

[0049] Specifically, the control switch 150 also includes an elastic structure 153 disposed in the switch connection portion 152, which is used to keep the control switch 150 in a conducting state when the electro-expansion structure 151 contracts.

[0050] In this embodiment, an elastic structure 153 is also provided at the position of the switch connection portion 152. The elastic structure 153 ensures that the switch connection portion 152 returns to its initial state, i.e., is in a connected state, after the electro-expansion structure 151 recovers its deformation. Generally, the elastic force of the elastic structure 153 should be less than the deformation force of the electro-expansion structure 151, so that when the electro-expansion structure 151 expands, the elastic force of the elastic structure 153 cannot keep the switch connection portion 152 in a connected state. However, when the electro-expansion structure 151 contracts, the elasticity of the elastic structure 153 causes the switch connection portion 152 to reset, forming a connected state.

[0051] However, since the electrical energy provided by the piezoelectric layer 120 gradually decreases to zero, the contraction of the electro-expansion layer is gradual during this process. But at this time, the control switch 150 is not yet in the connected state, and the piezoelectric layer 120 is insufficient, causing the power-consuming unit 140 to be unable to operate during this period. Especially during continuous operation, this leads to work interruption and poor connection. This application further improves upon this.

[0052] Figure 7 This is a schematic diagram of a display device according to the third embodiment of this application. See also: Figure 7 As shown, this application also discloses another display device 100, which includes the piezoelectric layer 120, power consumption unit 140, control switch 150, battery module 160, and amplifier circuit 170. The amplifier circuit 170 includes an amplifier 171, a first resistor R1, a second resistor R2, a third resistor R3, and a capacitor circuit 172. The first resistor R1 and the second resistor R2 are connected in series. The end of the first resistor R1 away from the second resistor R2 is connected to the first input terminal of the amplifier 171. One end of the third resistor R3 is connected to the second input terminal of the amplifier 171, and the other end of the third resistor R3 is connected to the output terminal of the amplifier 171. The first input terminal of the amplifier 171 is connected to the piezoelectric layer 120. The output terminal of the amplifier 171 is connected to the power consumption unit 140. The capacitor circuit 172 is connected to a first node, which is disposed between the amplifier circuit 170 and the power consumption unit 140.

[0053] In this embodiment, a capacitor circuit 172 is provided at the output terminal of amplifier 171. The capacitor circuit 172 stores some electrical energy. When the current generated by piezoelectric layer 120 is insufficient to drive the power-consuming unit 140, the electro-expansion structure 151 contracts. Before fully contracting to the point where the control switch 150 is turned on, the capacitor circuit 172 discharges to briefly power the power-consuming unit 140. This solves the problem of the power-consuming unit 140 being unable to operate continuously due to the switching between power supply from piezoelectric layer 120 and battery module 160.

[0054] Specifically, the capacitor circuit 172 includes a first capacitor C1, one end of which is connected to the first node, and the other end of which is grounded. In this embodiment, one or more first capacitors C1 can be provided. The first capacitor C1 can store a portion of charge. During a period when the piezoelectric layer 120 stops generating electrical energy, the electrical energy stored in the first capacitor C1 continues to power the power-consuming unit 140. After the battery module 160 is successfully turned on, the battery module 160 powers the power-consuming unit 140. During this process, the power supply to the power-consuming unit 140 is basically uninterrupted. During the process of switching the power supply of the power-consuming unit 140 from the battery module 160 to the piezoelectric layer 120, since the electro-expansion structure 151 gradually expands, the amplification circuit 170 already has current flowing through it, realizing the power supply to the power-consuming unit 140. During this process, the power supply to the power-consuming unit 140 is also basically uninterrupted. It is understandable that the power supply of the piezoelectric layer 120 is connected to the power consumption unit 140 through the amplifier circuit 170. When the piezoelectric layer 120 does not generate electrical energy, it no longer supplies power to the power consumption unit 140. The battery module 160 is connected to the power consumption unit 140 through the control switch 150.

[0055] In another embodiment, the control switch 150 can also be integrated into the timing control chip on the drive circuit board 130. Unlike the mechanical control switch 150 in the above embodiment, the control switch 150 in this embodiment can be an active switch, which is controlled to turn on and off by an electrical signal. The electrical signal can be implemented by the timing control chip. For example, when the timing control chip detects that the display device 100 is folded or the piezoelectric layer 120 generates current, an electrical signal is generated to control the active switch to turn off, so as to disconnect the connection between the battery module 160 and the power consumption unit 140.

[0056] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0057] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A display device, characterized in that, include: A piezoelectric layer is disposed within the folding area of ​​the display device to convert the mechanical energy of bending into electrical energy when the display device is bent. The power-consuming unit is connected to the piezoelectric layer and supplies power to the power-consuming unit when the piezoelectric layer generates electrical energy. A control switch, connected to the power-consuming unit, is used to disconnect when the piezoelectric layer generates electrical energy and to connect when the piezoelectric layer does not generate electrical energy. A battery module, connected to the control switch, is used to supply power to the power-consuming unit when the control switch is on. The display device further includes an amplification circuit, which is connected between the piezoelectric layer and the power-consuming unit, and is used to amplify the current generated by the piezoelectric layer. The control switch is further provided with an electro-expansion structure, which is connected to the piezoelectric layer. When the piezoelectric layer generates electrical energy, it expands. The electro-expansion structure is used to control the control switch to be in an open state during expansion, thus disconnecting the battery module from the power consumption unit. When the piezoelectric layer does not generate electrical energy, the electro-expansion structure contracts, the control switch is in a conducting state, and the battery module is connected to the power consumption unit. The control switch is also provided with an elastic structure, which is used to keep the control switch in a conducting state when the electro-expansion structure contracts. The display device further includes a capacitor circuit connected to a first node, which is disposed between the amplifier circuit and the power-consuming unit.

2. The display device according to claim 1, characterized in that, The folded region bends along a first direction under the action of external force, and the piezoelectric layer is arranged along the first direction; The display device further includes a display panel, and the piezoelectric layer is disposed on the surface of the display panel and / or the bottom surface of the display panel.

3. The display device according to claim 1, characterized in that, The amplification circuit includes an amplifier, a first resistor, a second resistor, and a third resistor. The first resistor and the second resistor are connected in series. The end of the first resistor away from the second resistor is connected to the first input terminal of the amplifier. One end of the third resistor is connected to the second input terminal of the amplifier, and the other end of the third resistor is connected to the output terminal of the amplifier. The first input terminal of the amplifier is connected to the piezoelectric layer. The output terminal of the amplifier is connected to the power-consuming unit.

4. The display device according to claim 1, characterized in that, The capacitor circuit includes a first capacitor, one end of which is connected to the first node, and the other end of which is grounded.

5. The display device according to claim 1, characterized in that, The power supply unit includes a Bluetooth chip or a radio frequency chip.

6. The display device according to claim 1, characterized in that, The display device includes a driver circuit board and a display panel, wherein the driver circuit board is used to drive the display panel to display; The power unit, the control switch, and the battery module are respectively mounted on the drive circuit board.

Images