Display device and display board

Abstract

This application relates to the field of display technology, specifically to a display device and a display board. The display device is used to be mounted on a target object, and includes a display circuit and a power supply circuit. The display circuit is used to display text or images; the power supply circuit is coupled to the display circuit and is used to convert the mechanical energy generated by the vibration of the target object into electrical energy to power the display circuit. The technical solution provided by the embodiments of this application achieves flexible control over the displayed content, reduces costs, and improves aesthetics and ease of installation and disassembly.

Description

Technical Field

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

[0002] A display board is a device used to display text, images, or symbols.

[0003] In related technologies, electronic display boards can update and control the display content, and can be powered by a battery, solar panel or external wiring harness during display.

[0004] However, battery power requires regular battery replacement and maintenance, and is less environmentally friendly. Connecting to a power source via solar panels or external wiring harnesses increases the hardware cost of the electronic display board, and is inconvenient to install and disassemble, resulting in unsightly wiring. Summary of the Invention

[0005] The purpose of this application is to provide a display device and display board that, while enabling flexible control over the displayed content, reduces costs and improves aesthetics and ease of installation and disassembly.

[0006] In a first aspect, a display device is provided for mounting on a target object, comprising a display circuit and a power supply circuit. The display circuit is used to display text or images. The power supply circuit is coupled to the display circuit and is used to convert the mechanical energy generated by the vibration of the target object into electrical energy to power the display circuit.

[0007] The technical solution provided in this application converts the mechanical energy generated by the vibration of the target object into electrical energy for power supply through a power supply circuit. This eliminates the need for external wiring harnesses, external power supplies, or solar panels, reducing power supply costs and improving the convenience of installation and disassembly. At the same time, the reduction in external wiring harnesses also enhances the aesthetics of the display device.

[0008] In one embodiment, the display circuit includes an electronic paper display and a driving circuit. The driving circuit, coupled to both the electronic paper display and the power supply circuit, is used to control the electronic paper display to display target text or a target image in response to a received first control command, wherein the first control command includes the target text or the target image. In this embodiment, the display is performed using an electronic paper display, which is a static, zero-power display that consumes power only when refreshing the displayed content, thus further reducing the cost of the display device.

[0009] In one embodiment, the display device provided in this application further includes a controller. The controller is coupled to the display circuit and configured to output a first control command to the display circuit in response to a received second control command. In the above embodiment, by parsing the second control command and thereby driving the display circuit to refresh the display content, the user can flexibly control the display content and display time of the display device.

[0010] In one embodiment, the display device provided in this application further includes a wireless communication circuit. The wireless communication circuit is coupled to a controller and configured to: in response to receiving a third control command, send a second control command to the controller and a fourth control command to the power supply circuit. The fourth control command instructs the power supply circuit to supply power to the wireless communication circuit, the controller, and the display circuit. In the above embodiment, remote communication is achieved through the wireless communication circuit, allowing users to flexibly control the display content and display time remotely, further improving the flexibility of display control.

[0011] In one embodiment, the wireless communication circuit includes a near field communication (NFC) chip. In this embodiment, the NFC chip supports a passive mode, remaining in sleep mode when no signal is received, thus reducing power consumption.

[0012] In one embodiment, the power supply circuit includes a piezoelectric device and a processing circuit. The piezoelectric device converts the mechanical energy generated by the vibration of the target object into alternating current (AC). The processing circuit, coupled to the piezoelectric device, converts the AC into direct current (DC) to power the display circuit. This embodiment, through the piezoelectric device and processing circuit, converts mechanical energy into electrical energy sufficient to meet power requirements, effectively utilizing the energy generated by the vibration of the target object and reducing power supply costs.

[0013] In one implementation, the target object is a vehicle. In this implementation, the vehicle experiences continuous vibrations during operation due to starting, stopping, and road bumps. This vibration energy is used to power an in-vehicle display device, allowing others to contact the owner promptly via the contact information displayed on the self-powered device, thus preventing disputes related to vehicle congestion.

[0014] Secondly, a display board is also provided, including a housing, a magnetic suction device, and a display device as described in any of the above embodiments. The display device and the magnetic suction device are respectively coupled to the housing. The magnetic suction device is used to couple the housing to the vehicle, and the display device is used to display text or images. In the above embodiments, the display device is coupled to the vehicle via the magnetic suction device. The display device has no external wiring interface, and no tools or wiring harnesses are required during installation. It does not require alteration to the vehicle's surface structure. This avoids the problems of adhesive residue caused by bonding and the instability of vacuum suction cup fixation, providing flexible installation and adaptability to different vehicle models.

[0015] In one embodiment, a shielding layer is provided on the surface of the housing to shield against electromagnetic interference from outside the housing. This embodiment reduces the impact of external electromagnetic interference on the power supply circuit, wireless communication circuit, etc., effectively ensuring the safe and stable operation of the display device.

[0016] In one embodiment, the display device includes a wireless communication circuit for communicating wirelessly with the vehicle. This embodiment reuses existing vehicle devices (such as NFC) to achieve communication with the wireless communication circuit, further reducing costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the installation position of a display board provided for an embodiment of this application; Figure 2 This application provides a schematic diagram of the structure of a display board according to an embodiment of the present application; Figure 3 A bottom view of a display board provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a display device provided in an embodiment of this application; Figure 5 This is a schematic diagram of another display device provided in an embodiment of this application; Figure 6 A top view of a display board provided in an embodiment of this application; Figure 7 This is a flowchart illustrating a method for refreshing a display board, as provided in an embodiment of this application.

[0019] Figure label: 100. Display board; 10. Housing; 11. Mounting cavity; 20. Magnetic suction device; 30. Display device; 1. Display circuit; e. Electronic paper display; f. Driver circuit; 2. Power supply circuit; a. piezoelectric components; b. processing circuit; c. energy storage unit; d. energy management chip; 3. Controller; 4. Wireless communication circuit; 200. Vehicles. Detailed Implementation

[0020] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0021] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A and / or B" includes three combinations: A only, B only, and a combination of A and B.

[0022] In describing some embodiments, the term "connection" and its derivative expressions may be used. For example, the term "connection" may be used in describing some embodiments to indicate that two or more components have direct physical or electrical contact with each other. However, the term "connection" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. For example, A is connected to B, which can indicate that A is directly connected to B, or it can indicate that A is indirectly connected to B through C. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0023] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner. In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0024] This application provides a display board for displaying text, images, symbols, etc. Optionally, the display board includes electronic display boards, scoreboards, license plates, billboards, number plates, etc.

[0025] For example, the display board inside the vehicle that shows the owner's contact information is a number plate. In situations where the vehicle is temporarily parked and blocking the road, or when the owner is not present, others can quickly contact the owner through the number plate to arrange for the vehicle to be moved, thus reducing disputes and congestion.

[0026] Since the content displayed on physical display boards (such as cards or plastic boards) cannot be easily changed and is prone to wear and tear, they cannot meet the user's display needs when these needs change (such as driver change, phone number change, or number hiding). Electronic display boards can be used to display the vehicle owner's contact information.

[0027] In related technologies, electronic displays powered by disposable batteries require regular battery replacement and maintenance, and are less environmentally friendly. Electronic displays powered by solar panels or connected to the vehicle's power supply via external wiring harnesses increase costs, are inconvenient to install and remove, and have wiring that affects the cabin's aesthetics.

[0028] Based on this, the present application provides a simple and beautiful display board that is easy to disassemble and can be self-powered and remotely controlled. The display board can be installed on vehicles or other devices with display requirements, such as rails, bridges, street light poles, industrial machinery, etc.

[0029] For example, the display board includes a housing, a magnetic attachment device, and a display device. The display device is attached to the target object via the magnetic attachment device. Optionally, the target object includes equipment capable of generating energy through vibration, such as vehicles or industrial machinery. For example: Figure 1 As shown, the display panel 100 is coupled to the dashboard of the vehicle 200. When the display device is installed in the vehicle, the display device and the magnetic attachment device are respectively coupled to the housing, and the magnetic attachment device is used to couple the housing to the vehicle.

[0030] For example, please refer to Figure 2 Two magnetic suction devices 20 are respectively coupled to the first surface of the housing 10 for coupling the housing 10 to the vehicle. A display device 30 is coupled to the second surface of the housing 10 for displaying text or images (such as the vehicle owner's contact information). This application does not limit the number, shape, or installation position of the magnetic suction devices 20, as long as they can achieve the magnetic installation function. The structure of the display board in this application is also not limited. Figure 2 The cuboid structure shown. For example: Figure 3 As shown, the magnetic attraction device 20 has a circular shape on the first surface of the housing 10.

[0031] Optionally, the magnetic attraction device 20 is a neodymium iron boron magnet, which can be compatible with neodymium iron boron magnets in the vehicle to achieve magnetic connection, such as... Figure 5As shown, the magnetic attraction device 20 is magnetically connected to the dashboard magnet of the vehicle 200. Alternatively, the magnetic attraction device 20 can also be a ferrite, AlNiCo, or other magnets, which is not limited in this application. The housing 10 is made of acrylonitrile butadiene styrene (ABS) plastic, polycarbonate (PC) plastic, or aluminum alloy, with a thickness of 1-3 mm and a weight of ≤50 g, but is not limited to these materials.

[0032] In some embodiments, the surface of the housing 10 is provided with a mounting cavity, and the magnetic attraction device 20 is coupled to the housing 10 through the mounting cavity. For example: Figure 3 As shown, mounting cavities 11 are provided on both sides of the first surface of the housing 10. The magnetic suction device 20 is inserted into or embedded in the housing 10 through the mounting cavity 11 to ensure that the surface of the housing 10 and the surface of the target object are closely attached to each other and to prevent the housing 10 from slipping off.

[0033] In some embodiments, a shielding layer is provided on the surface of the housing 10 to shield against electromagnetic interference from outside the housing 10. For example, a shielding layer is provided on the inner wall of the mounting cavity to reduce the impact of electromagnetic interference from outside the housing 10 on the display device (such as display circuit or communication circuit) inside the housing 10. Optionally, the shielding layer can be aluminum foil, copper foil, nickel-copper alloy, etc.

[0034] In some embodiments, please refer to Figure 4 The display device includes a display circuit 1 and a power supply circuit 2, with the power supply circuit 2 coupled to the display circuit 1.

[0035] The display circuit 1 is used to display text or images.

[0036] Power supply circuit 2 is used to convert the mechanical energy generated by vehicle vibration into electrical energy, such as in microelectromechanical systems (MEMS). electro piezoelectric vibration energy harvester (MEMS).

[0037] For example, such as Figure 5 As shown, the power supply circuit 2 includes a piezoelectric device a and a processing circuit b. The piezoelectric device a is used to convert the mechanical energy generated by vehicle vibration into alternating current. The processing circuit b is coupled to the piezoelectric device a and is used to convert the alternating current into direct current to power the display circuit 1.

[0038] Optionally, the material of piezoelectric device a can be piezoelectric ceramic, piezoelectric single crystal, piezoelectric thin film, etc. When subjected to mechanical stress or strain, the positive and negative charge centers inside the piezoelectric material will undergo relative displacement, generating polarization, and thus forming equal amounts of opposite charges on the surface, realizing the conversion of mechanical energy and electrical energy. Specifically, the vibration-sensitive direction of piezoelectric device a is consistent with the main vibration direction of the vehicle mounting surface (such as the vertical direction or the horizontal direction).

[0039] For example, piezoelectric device a is connected to the housing (such as inside the mounting cavity) through an elastic buffer (such as a silicone pad, rubber pad, or spring sheet) and fits tightly against the vehicle surface to achieve accurate sensing of vehicle vibration.

[0040] Vehicle vibration is typically a periodic reciprocating motion. The piezoelectric device a outputs an AC voltage with the same vibration frequency. Therefore, a processing circuit b is needed to process the AC power generated by the piezoelectric device a. For example, the processing circuit b includes a rectifier circuit (AC-DC converter circuit), a voltage regulation circuit (such as a boost circuit or a buck circuit), and an impedance matching circuit.

[0041] In some embodiments, the power supply circuit 2 further includes an energy storage unit c and an energy management chip d.

[0042] The energy storage unit c is used to store the electrical energy output by the processing circuit b. Optionally, the energy storage unit c may include a supercapacitor, a hybrid capacitor, a micro battery, etc.

[0043] The energy management chip d is used to control the processing of the processing circuit b (such as AC-DC conversion, boost and voltage regulation) and the charging and discharging management of the energy storage unit c (such as overvoltage protection, undervoltage sleep, charging and discharging timing and low power management).

[0044] In some embodiments, the display circuit 1 includes an electronic paper display and a driving circuit. The driving circuit is coupled to the electronic paper display and the power supply circuit, and is used to control the electronic paper display to display target text or target image in response to a received first control command.

[0045] Among them, electronic paper displays, also known as electronic ink screens, can achieve paper-like visual effects using electronic ink (such as electrophoresis technology). They only consume power when refreshing the screen, and have almost zero power consumption when displaying static images. They do not require backlighting and have good visibility under strong light.

[0046] For example, such as Figure 6 As shown, the electronic paper display e is a fragmented display screen, embedded in the surface of the housing 10. The display content (such as numbers, letters, etc.) on the fragmented display screen is preset. The display content can be refreshed by controlling the preset "fields" to be displayed or not displayed through the driving circuit.

[0047] For example, such as Figure 6As shown, the electronic paper display e contains 11 seven-segment digits, each capable of displaying numbers 0-9. These 11 digits together form a phone number. Each segment of the digit is a bar-shaped electronic ink pattern, composed of colored charged particles and a suspension. When the driving circuit controls the flow of driving current, the colored charged particles rise or sink under the influence of the electric field, thus achieving color changes from white to black / from black to white.

[0048] Specifically, the electronic paper display e has a microcapsule structure, containing millions of microcapsules approximately 100 micrometers in diameter per square inch. Each microcapsule contains negatively charged black particles (such as carbon black particles), positively charged white particles (such as titanium dioxide particles), and a transparent suspension (such as paraffin oil, used to suspend the particles). When a momentary voltage is applied to the electrodes on both sides of the electronic paper display e, the positive and negative particles migrate in opposite directions under the influence of the electric field. In areas where black needs to be displayed, the negatively charged black particles migrate to the top of the microcapsule (close to the upper surface of the electronic paper display e), while the positively charged white particles sink to the bottom. In areas where white needs to be displayed, the positively charged white particles migrate to the top of the microcapsule, while the negatively charged black particles sink to the bottom. When the voltage is removed, the particles do not move randomly due to the balance between gravity and liquid resistance, thus maintaining the current display state. Therefore, the electronic paper display e does not consume power when not updating phone numbers; it only needs to draw instantaneous power from the energy storage unit when the displayed content needs to be changed. In addition, electronic paper displays do not emit light themselves; their black particles absorb incident light, while their white particles reflect it. Therefore, they have high visibility in sunlight, ensuring that phone numbers can still be clearly identified in vehicles in open-air environments, which meets practical usage needs.

[0049] The driving circuit f provides different driving voltages to different areas of the electronic paper display e, controlling the display content of the electronic paper display e. Specifically, the first control command includes target text or target image. After receiving the first control command, the driving circuit f determines the magnitude and timing of the driving voltage according to the target text or target image, and provides the driving voltage to the electronic paper display e according to the determined magnitude and timing, so that the electronic paper display e displays the target text or target image.

[0050] In some embodiments, such as Figure 5 As shown, the display device provided in this embodiment of the application further includes a controller 3. The controller 3 is integrated inside the housing and electrically connected to the display circuit 1, and is used to output a first control command to the display circuit 1 in response to a received second control command.

[0051] The second control instruction carries the target text or target image. Controller 3 parses the second control instruction and directly generates a drive instruction, which is sent to drive circuit f to control the drive voltage provided by drive circuit f to electronic paper display e.

[0052] Optionally, the controller 3 can be a microcontroller unit (MCU), a microprocessor unit (MPU), a field programmable gate array (FPGA), an electronic paper controller, etc.

[0053] In some embodiments, the display device provided in this application includes a wireless communication circuit 4. The wireless communication circuit 4 is coupled to a controller 3 and is used to send a second control command to the controller 3 and a fourth control command to the power supply circuit 2 in response to a received third control command.

[0054] The fourth control command is used to instruct the power supply circuit 2 to supply power to the wireless communication circuit 4, the controller 3, and the display circuit 1.

[0055] For example, the wireless communication circuit 4 includes an NFC chip. The NFC chip is electrically connected to the controller 3 and the power supply circuit 2, as shown below. Figure 3 As shown, the NFC chip can be placed on the first surface of the housing 10, as close as possible to the vehicle surface to reduce the distance to the NFC in the vehicle.

[0056] The NFC chip is in a sleep state when no NFC signal magnetic field is detected in vehicle 200. When an NFC signal magnetic field is detected, it receives a third control command from NFC and sends a fourth control command to power supply circuit 2, so that power supply circuit 2 supplies power to wireless communication circuit 4, controller 3 and display circuit 1. At the same time, it sends a second control command to controller 3, so that controller 3 controls display circuit 1 to change the displayed content.

[0057] In some embodiments, the NFC chip is an ultra-long-range NFC chip, with a communication distance of up to 50cm. Compared to near-field communication NFC with a communication distance of ≤10cm, this better meets the distance requirements between the vehicle's built-in NFC and the display panel (dashboard). For example, the display panel can be placed on the dashboard of the vehicle 200, below the windshield, and the vehicle 200's NFC can be placed in the vehicle's armrest box.

[0058] For example, the communication distance of an NFC chip can be increased by improving the power of the transmitter, increasing the number of turns of the NFC coils at the transmitter and receiver, adding a noise amplifier to amplify the induced current signal, and using a semi-active communication mode.

[0059] The semi-active mode of the NFC chip means that the NFC chip is powered by its energy storage unit, without relying on the magnetic field of the vehicle's NFC transmitter for power. Meanwhile, the NFC chip enters a sleep state after completing active communication (successfully sending the second and fourth control commands).

[0060] In some embodiments, such as Figure 5 As shown, the user inputs display control commands through the vehicle's infotainment system. After receiving the display control commands from the infotainment system, the NFC of the vehicle 200 sends a third control command to the NFC chip of the display board, thereby changing and refreshing the display content of the display board, or controlling the display board to turn on (display content) or off (not display content).

[0061] In some embodiments, users can communicate remotely with the vehicle via mobile devices (such as mobile phones or smartwatches) to remotely control the opening and closing of the display board and the content displayed.

[0062] In some embodiments, please refer to Figure 7 The present application provides a method for refreshing a display board, which includes: Step S701: Vehicle vibration generates mechanical energy.

[0063] Step S702: The piezoelectric device vibrates, converting mechanical energy into alternating current.

[0064] Step S703: Convert AC power into DC power through processing circuit, and perform voltage boosting and / or voltage regulation.

[0065] Step S704: Store the generated DC power through the energy storage unit.

[0066] Step S705: When it is necessary to refresh the display content, the NFC chip controls the energy storage unit to supply power to the NFC chip, controller, and display circuit via the fourth control command. Simultaneously, the NFC chip wakes up the controller via the second control command, causing the controller to control the drive circuit to provide driving voltage to the electronic paper display.

[0067] Step S706: The driving circuit drives the electronic paper display to refresh the displayed content based on the driving voltage.

[0068] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0069] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display device, characterized in that, The display device, for setting on a target object, includes: Display circuitry is used to display text or images; A power supply circuit, coupled to the display circuit, is used to convert the mechanical energy generated by the vibration of the target object into electrical energy to power the display circuit.

2. The display device according to claim 1, characterized in that, The display circuit includes: Electronic paper display; A driving circuit, coupled to the electronic paper display and the power supply circuit respectively, is used to control the electronic paper display to display target text or target image in response to a received first control command, wherein the first control command includes the target text or the target image.

3. The display device according to claim 2, characterized in that, Also includes: The controller, coupled to the display circuit, is configured to output a first control command to the display circuit in response to a received second control command.

4. The display device according to claim 3, characterized in that, Also includes: A wireless communication circuit, coupled to the controller, is configured to: in response to a received third control command, send a second control command to the controller and a fourth control command to the power supply circuit; the fourth control command instructs the power supply circuit to supply power to the wireless communication circuit, the controller, and the display circuit.

5. The display device according to claim 4, characterized in that, The wireless communication circuit includes a near field communication (NFC) chip.

6. The display device according to claim 1, characterized in that, The power supply circuit includes: Piezoelectric devices are used to convert the mechanical energy generated by the vibration of the target object into alternating current. A processing circuit, coupled to the piezoelectric device, is used to convert the alternating current into direct current to power the display circuit.

7. The display device according to any one of claims 1-6, characterized in that, The target object is a vehicle.

8. A display board, characterized in that, The device includes a housing, a magnetic attraction device, and a display device as described in any one of claims 1-7; the display device and the magnetic attraction device are respectively coupled to the housing, the magnetic attraction device is used to couple the housing to a vehicle, and the display device is used to display text or images.

9. The display board according to claim 8, characterized in that, The surface of the housing is provided with a shielding layer, which is used to shield the electromagnetic interference outside the housing.

10. The display panel according to claim 8, characterized in that, The display device includes a wireless communication circuit for communicating wirelessly with the vehicle.

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