Display device and its control method

Abstract

The present disclosure provides an isolation display device and a control method therefor. The display device includes: a display; an energy coil having a first end for providing a power supply voltage and a second end for providing a reference voltage; a processor connected to the first end and the second end of the energy coil, the processor being configured to be powered by the power supply voltage and the reference voltage and to generate a control signal according to the power supply voltage; an energy storage circuit connected to the first end of the energy coil for storing energy according to the power supply voltage; and a voltage control circuit connected to the display, the processor, and the first end of the energy coil for supplying power to the display based on the potential of the first end of the energy coil under the control of the control signal generated by the processor.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display device and a control method thereof. Background Art

[0002] The working principle of a passive electronic name tag mainly involves energy conversion during electromagnetic induction, converting magnetic energy into electrical energy, and using a farad capacitor for energy storage to supply power to each module circuit in the electronic name tag. Usually, potential hazards that may occur during the use of a passive electronic name tag are that during the conversion of electrical energy and magnetic energy, due to insufficient energy, data may be lost during data transmission and the display screen refresh may be abnormal, thus bringing a poor product experience to users. Summary of the Invention

[0003] Embodiments of the present disclosure provide a display device, including:

[0004] A display;

[0005] An energy coil having a first end for providing a power supply voltage and a second end for providing a reference voltage;

[0006] A processor connected to the first end and the second end of the energy coil, the processor being configured to be powered by the power supply voltage and the reference voltage and to generate a control signal according to the power supply voltage;

[0007] An energy storage circuit connected to the first end of the energy coil for storing energy according to the power supply voltage;

[0008] A voltage control circuit connected to the display, the processor, and the first end of the energy coil, for supplying power to the display based on the potential of the first end of the energy coil under the control of the control signal generated by the processor.

[0009] For example, the display device further includes:

[0010] A data coil having a first end for providing a first data voltage and a second end for providing a second data voltage;

[0011] A near-field communication circuit connected to the processor, the first end of the energy coil, the second end of the energy coil, the first end of the data coil, and the second end of the data coil, the near-field communication circuit being configured to be powered by the power supply voltage and the reference voltage, to generate a data signal according to the first data voltage and the second data voltage, and to provide the generated data signal to the processor;

[0012] The processor is also connected to the display, and is further configured to control the display to display according to the data signal provided by the near field communication circuit.

[0013] For example, the energy storage circuit includes a plurality of capacitors connected in parallel, a first electrode of each capacitor is connected to the first end of the energy coil, and a second electrode of each capacitor is grounded.

[0014] For example, the multiple capacitors include a first capacitor, a second capacitor and a third capacitor, the first pole of each of the first capacitor, the second capacitor and the third capacitor is connected to the first end of the energy coil, and the second pole of each of the first capacitor, the second capacitor and the third capacitor is grounded.

[0015] For example, the voltage control circuit includes:

[0016] an inductor, wherein a first end of the inductor is connected to a first end of the energy coil, and a second end of the inductor is connected to a first electrode of the diode and a first electrode of the transistor respectively;

[0017] A transistor, wherein a control electrode of the transistor is connected to the processor, a first electrode of the transistor is connected to the second end of the inductor, and a second electrode of the transistor is grounded;

[0018] A diode, a first electrode of the diode is connected to the second end of the inductor, and a second electrode of the diode is connected to the display.

[0019] For example, the voltage control circuit further includes:

[0020] a first resistor, wherein the first resistor is connected between the processor and a control electrode of the transistor;

[0021] A second resistor is connected to the second electrode of the transistor.

[0022] For example, the processor is configured to generate a control signal for turning off the transistor in response to the power supply voltage being higher than a preset threshold.

[0023] For example, the display device further includes a circuit board, the circuit board having a first substrate and a second substrate arranged opposite to each other, a first conductor layer and a second conductor layer located between the first substrate and the second substrate, and a first insulating layer located between the first conductor layer and the second conductor layer, the second conductor layer being located on a side of the first conductor layer away from the first substrate, wherein

[0024] The energy coil is located on the first conductor layer of the circuit board, and the data coil is located on the second conductor layer of the circuit board;

[0025] The processor, the energy storage circuit, the voltage control circuit, and the near-field communication circuit are located on a side of the first substrate facing away from the second substrate.

[0026] For example, the energy coil includes a first energy sub-coil, a second energy sub-coil, and a third energy sub-coil connected in series. The first conductor layer of the circuit board includes a first sub-layer and a second sub-layer. The first sub-layer is located on a side of the second sub-layer facing away from the second conductor layer, and a second insulating layer is provided between the first sub-layer and the second sub-layer. Among them,

[0027] The first energy sub-coil and the second energy sub-coil are located on the first sub-layer, and the third energy sub-coil is located on the second sub-layer.

[0028] For example, the first energy sub-coil, the second energy sub-coil, and the third energy sub-coil respectively have a first projection, a second projection, and a third projection on the first substrate of the circuit board, where the first projection and the second projection do not overlap, and the third projection partially overlaps with the first projection and the second projection respectively.

[0029] For example, the circuit board has a rectangular shape, and the first projection, the second projection, and the third projection are arranged along the length direction of the circuit board;

[0030] The first projection, the second projection, and the third projection have a rectangular contour.

[0031] For example, each of the first energy sub-coil, the second energy sub-coil, and the third energy sub-coil has 2 to 4 turns, and the data coil has 1 to 3 turns.

[0032] For example, the data coil extends along the edge region of the circuit board.

[0033] For example, the projection of the data coil on the first substrate of the circuit board has a rectangular contour.

[0034] For example, the display device further includes a non-contact identification component, which is located on a side of the second substrate facing away from the first substrate, and the non-contact identification component is configured to provide identification information of the display device.

[0035] For example, the display is located on a side of the first substrate facing away from the second substrate.

[0036] For example, the display is an electronic paper display.

[0037] For example, the processor is further configured to: convert a data signal received from the near-field communication circuit into display data; determine whether data transmission is successful according to the amount of the display data; and in response to successful data transmission, use the display data to control the display for display.

[0038] For example, the processor is further configured to: in response to a data transmission failure, control the near-field communication circuit to output, through the data coil, first feedback information indicating the data transmission failure; in response to receiving a data signal from the near-field communication circuit again, return to perform the operation of converting the received data signal into display data; and after using the display data to control the display for display, in response to receiving a feedback signal indicating a display refresh failure from the display, control the near-field communication circuit to output, through the data coil, second feedback information indicating the display refresh failure.

[0039] Embodiments of the present disclosure further provide a method for controlling a display device executed by a server, where the display device is the display device as described above, and the method includes:

[0040] In response to receiving a non-contact identification request including identification information of the display device, determine whether the identification information in the non-contact identification request matches pre-stored identification information;

[0041] In response to the identification information in the non-contact identification request matching the pre-stored identification information, determine whether the non-contact identification request is a write request;

[0042] In response to the non-contact identification request being a write request, generate a write control command for controlling a client to write display data to the near-field communication circuit of the display device.

[0043] Embodiments of the present disclosure further provide a method for controlling a display device executed by a client, where the display device is the display device as described above, and the method includes:

[0044] Obtain the identification information of the display device from a non-contact identification component of the display device;

[0045] Include the identification information in a non-contact identification request and send it to the server;

[0046] In response to receiving a write control command from the server, provide a signal including display data to the near-field communication circuit of the display device according to the write control command.

[0047] For example, the method further includes: after providing a signal including display data to the near-field communication circuit of the display device,

[0048] In response to receiving first feedback information indicating a data transmission failure from the display device, determine whether the number of times the first feedback information is received is less than a preset threshold;

[0049] In response to the number of times the first feedback information is received being less than the preset threshold, return to perform the operation of providing a signal including display data to the near - field communication circuit of the display device.

[0050] For example, the method further includes: in response to the number of times the first feedback information is received being greater than or equal to the preset threshold, output a first result indicating a data transmission failure to the server.

[0051] For example, the method further includes: after providing a signal including display data to the near - field communication circuit of the display device, in response to receiving second feedback information indicating a display refresh failure from the display device, output a second result indicating a display refresh failure to the server. Brief Description of the Drawings

[0052] Figure 1 A block diagram of a display device according to an embodiment of the present disclosure is shown.

[0053] Figure 2 A block diagram of a display device according to another embodiment of the present disclosure is shown.

[0054] Figure 3 A circuit diagram of a display device according to another embodiment of the present disclosure is shown.

[0055] Figure 4 A cross - sectional view of a display device according to an embodiment of the present disclosure is shown.

[0056] Figure 5 A cross - sectional view of a display device according to another embodiment of the present disclosure is shown.

[0057] Figure 6 Shows Figure 5 a plan view of an energy coil and a data coil of the display device.

[0058] Figure 7 A flowchart of a control method of a display device according to an embodiment of the present disclosure is shown.

[0059] Figure 8 A flowchart of a control method of a display device according to another embodiment of the present disclosure is shown.

[0060] Figure 9 An example diagram of a control method of a display device according to an embodiment of the present disclosure is shown. Detailed Description of the Embodiment

[0061] Although the present disclosure will be fully described with reference to the accompanying drawings that contain preferred embodiments of the present disclosure, it should be understood before this description that those of ordinary skill in the art may modify the disclosure described herein while achieving the technical effects of the present disclosure. Therefore, it should be understood that the above description is a broad disclosure to those of ordinary skill in the art, and the content thereof is not intended to limit the exemplary embodiments described in the present disclosure.

[0062] In addition, in the following detailed description, for the sake of explanation, numerous specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments may be implemented without these specific details. In other instances, well-known structures and devices are illustrated in a schematic manner to simplify the drawings.

[0063] Furthermore, in the description of the embodiments of the present disclosure, the terms "first level" and "second level" are only used to distinguish the different amplitudes of two levels. In some embodiments, the "first level" may be an invalid level that turns on a relevant transistor, and the "second level" may be an effective level that turns off the relevant transistor. In the following, since the driving transistor is exemplified as a P-type thin film transistor, the "first level" is exemplified as a high level, and the "second level" is exemplified as a low level.

[0064] Embodiments of the present disclosure provide a display device, which can enable the display device to have sufficient energy supply during operation, so that data can be normally transmitted and the display screen can be successfully refreshed.

[0065] Figure 1 A block diagram of a display device according to an embodiment of the present disclosure is shown.

[0066] As Figure 1 shown, the display device 100 includes an energy coil 110, a processor 120, an energy storage circuit 130, a voltage control circuit 140, and a display 150.

[0067] The energy coil 110 has a first terminal RFA+ for providing a power supply voltage and a second terminal RFA- for providing a reference voltage.

[0068] The processor 120 is connected to the first terminal RFA+ and the second terminal RFA- of the energy coil 110. The processor 120 can be powered by the power supply voltage from the first terminal RFA+ and the reference voltage from the second terminal RFA-, and generate a control signal according to the power supply voltage.

[0069] The energy storage circuit 130 is connected to the first terminal RFA+ of the energy coil 110. The energy storage circuit 130 can store energy according to the power supply voltage from the first terminal RFA+.

[0070] The voltage control circuit 140 is connected to the display 150, the processor 120, and the first terminal RFA+ of the energy coil 110. The voltage control circuit 140 can supply power to the display 150 based on the potential of the first terminal RFA+ of the energy coil 110 under the control of a control signal generated by the processor 120.

[0071] During operation, the energy coil 110 can generate a voltage according to the induced electromagnetic signal. This voltage can be stored in the energy storage circuit and supply power to the processor 120. When the processor 120 detects that the voltage meets a preset condition (such as being higher than a preset threshold), it can generate a control signal to control the voltage control circuit 140 to supply power to the display 150 based on the voltage provided by the energy coil 110, so that the display 150 can perform a display.

[0072] In the display device provided by the embodiment of the present disclosure, by providing an energy storage circuit and a voltage control circuit controlled by a processor based on a power supply voltage, it is possible to supply power to the display based on the power stored in the energy storage circuit under the control of the processor, thereby avoiding affecting the display effect of the display due to insufficient or unstable voltage provided by the energy coil.

[0073] Figure 2 The block diagram of a display device according to another embodiment of the present disclosure is shown.

[0074] As Figure 2 shown, similar to Figure 1 , the display device 200 includes an energy coil 210, a processor 220, an energy storage circuit 230, a voltage control circuit 240, and a display 250. The above description with reference to Figure 1 also applies to the display device 200. The difference is that Figure 2 the shown display device 200 further includes: a data coil 260 and a near-field communication circuit 270. For the sake of simplicity of description, the different parts will be mainly described in detail below.

[0075] The near-field communication circuit 270 is respectively connected to the energy coil 210, the processor 220, and the data coil 260. In some embodiments, the processor 220 may be a microcontroller unit (MCU, Microcontroller Unit).

[0076] The data coil 260 has a first terminal RFB+ for providing a first data voltage and a second terminal RFB- for providing a second data voltage.

[0077] The near - field communication circuit 270 is respectively connected to the processor 220, the first end RFA+ of the energy coil 210, the second end RFA- of the energy coil 210, the first end RFB+ of the data coil 260, and the second end RFB- of the data coil. The near - field communication circuit 270 is powered by the power supply voltage and the reference voltage, and generates a data signal based on the first data voltage from the first end RFB+ of the data coil 260 and the second data voltage from the second end RFB- of the data coil 260, and provides the generated data signal to the processor 220. In some embodiments, the near - field communication circuit 270 can communicate with the processor 220 through the I2C protocol.

[0078] The processor 220 is connected to the first end RFA+ and the second end RFA- of the energy coil 210. The processor 220 can be powered by the power supply voltage from the first end RFA+ and the reference voltage from the second end RFA-, and generates a control signal based on the power supply voltage. The processor 220 is also connected to the display 250, and communicates with the display 250 through, for example, the Serial Peripheral Interface (SPI) protocol. The processor 250 can control the display 250 to display based on the data signal received from the near - field communication circuit 270.

[0079] During operation, the energy coil 210 can supply power to the processor 220 and the near - field communication circuit 270 based on the induced electromagnetic signal. The data coil 260 can provide a data voltage to the near - field communication circuit 270 based on the induced electromagnetic signal. The near - field communication circuit 270 can generate a data signal based on the received data voltage and provide the data signal to the processor 220. The processor 220 controls the voltage control circuit 240 to supply power to the display 250 based on the voltage provided by the energy coil 210, and controls the display 250 to display based on the data signal received from the near - field communication circuit 270.

[0080] For example, after receiving a data signal from the near - field communication circuit 270, the processor 220 can convert the data signal into display data, and determine whether the data transmission is successful based on the amount of data in the display data. If the data transmission is successful, the processor 220 can use the display data to control the display 250 to display. If the data transmission fails, the processor 220 can control the near - field communication circuit 270 to output first feedback information indicating the data transmission failure through the data coil 260. Thereafter, if the processor 220 receives a data signal from the near - field communication circuit 270 again, the processor 220 can return to perform the operation of converting the received data signal into display data to achieve data re - transmission.

[0081] In some embodiments, after the processor 220 uses the display data to control the display 250 for display, if a feedback signal indicating a display refresh failure is received from the display 250, it can control the near-field communication circuit 270 to output second feedback information indicating the display refresh failure through the data coil 260.

[0082] In some embodiments, the display 250 is an electronic paper display. Electronic paper has the characteristics of low power consumption, environmental friendliness, and eye protection. It can flexibly update display information as needed. By using an energy coil to power the electronic paper display, the display device 200 has greater display flexibility, is more environmentally friendly, and has lower power consumption.

[0083] Figure 3 The circuit diagram of a display device according to another embodiment of the present disclosure is shown.

[0084] As Figure 3 shown, similar to Figure 2 , the display device 300 includes an energy coil 310, a processor 320, an energy storage circuit 330, a voltage control circuit 340, and a display 350. The above description with reference to Figure 2 also applies to the display device 300.

[0085] As Figure 3 shown, the energy storage circuit 330 may include a plurality of capacitors connected in parallel between the first terminal RFA+ of the energy coil 310 and the ground terminal GND, such as but not limited to ceramic capacitors, organic capacitors, etc. In the Figure 3 example, the energy storage circuit 330 includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, and the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all ceramic capacitors. The first poles of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all connected to the first terminal RFA+ of the energy coil 310, and the second poles of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all grounded (connected to the ground terminal GND). In some embodiments, the energy storage circuit 330 may also include any number of capacitors connected in parallel, for example, more than three or less than three. The embodiments of the present disclosure use a combination of multiple capacitors and a voltage control circuit to achieve energy storage and power supply. Compared with the farad capacitors used in traditional technologies, it can provide sufficient and stable power supply voltage to the display while reducing the occupied space and saving costs.

[0086] The voltage control circuit 340 includes an inductor L1, a transistor T1, and a diode VD1.

[0087] The first end of inductor L1 is connected to the first pole of each of first ceramic capacitor C1, second ceramic capacitor C2, and third ceramic capacitor C3. The second end of inductor L1 is respectively connected to the first pole of diode VD1 and the first pole of transistor T1.

[0088] The first pole of transistor T1 is respectively connected to the second end of inductor L1 and the first pole of diode VD1. The second pole of transistor T1 is grounded, and the control pole of the transistor is connected to processor 320.

[0089] The first pole of diode VD1 is respectively connected to the second end of inductor L1 and the first pole of transistor T1. The second pole of diode VD1 is connected to display 300.

[0090] In some embodiments, voltage control circuit 340 may further include first resistor R1 and second resistor R2. First resistor R1 may be connected between processor 320 and the control pole of transistor T1. Second resistor R2 may be connected between the second pole of transistor T2 and ground terminal GND. In some embodiments, voltage control circuit 340 may further include any number of resistors, for example, more than two or less than two.

[0091] In this embodiment, when the power supply voltage received by processor 320 from the first end RFA+ of energy coil 310 is higher than a preset threshold, a control signal for turning off transistor T1 is generated.

[0092] For example, processor 320 may output a control signal of a first level when the power supply voltage at the first end RFA+ of energy coil 310 is lower than the preset threshold, and output a control signal of a second level when it is higher than the preset threshold. In some embodiments, diode VD1 may be set to conduct at a voltage of about 3V.

[0093] When the control signal is at the first level, transistor T1 conducts. The power supply voltage at the first end RFA+ of energy coil 310 stores energy in first ceramic capacitor C1, second ceramic capacitor C2, third ceramic capacitor C3, and inductor L1. At this time, since transistor T1 conducts, the first pole of diode VD1 is grounded, so that diode VD1 cannot conduct.

[0094] When the control signal is at the second level, transistor T1 is cut off. The first pole of diode VD1 is no longer grounded. At this time, since the energy stored in inductor L1 cannot change suddenly, the voltage across inductor L1 is superimposed on the power supply voltage at the first end RFA+ of energy coil 310, causing diode VD1 to conduct, thereby supplying power to display 350. By storing energy in inductor L1 to supply the load, the dynamic load-carrying capacity can be effectively improved, ensuring that the power supply voltage can be stably output when the display screen of the display is refreshed.

[0095] Figure 4 FIG. Figure 4 shows a cross-sectional view of a display device according to an embodiment of the present disclosure. The display device may have the circuit structure of any of the above embodiments, so the description of the display device in any of the above embodiments also applies to Figure 4 the display device 400.

[0096] As Figure 4 shown, the display device 400 includes a circuit board having a first substrate 410 and a second substrate 450 disposed opposite to each other, a first conductor layer 420 and a second conductor layer 440 located between the first substrate 410 and the second substrate 450, and a first insulating layer 430 located between the first conductor layer 420 and the second conductor layer 440. The second conductor layer 440 is located on a side of the first conductor layer 420 facing away from the first substrate 410.

[0097] In some embodiments, the energy coil of the display device 400 may be located on the first conductor layer 420 of the circuit board, and the data coil of the display device 400 may be located on the second conductor layer 440 of the circuit board. By disposing the energy coil and the data coil on different layers, mutual interference between the inductance coils can be avoided.

[0098] As Figure 4 shown, the circuit board further includes a first circuit layer 460 located on a side of the first substrate 410 facing away from the second substrate 450. In some embodiments, at least one of a processor, an energy storage circuit, a voltage control circuit, and a near-field communication circuit of the display device 400 may be disposed in the first circuit layer 460.

[0099] Figure 5 FIG. Figure 5 shows a cross-sectional view of a display device according to another embodiment of the present disclosure. Figure 6 FIG. Figure 6 shows Figure 5 a plan view of the energy coil and the data coil of the display device.

[0100] As Figure 5 and Figure 6 shown, similar to Figure 4 FIG. Figure 4 , the display device 500 includes a circuit board having a first substrate 510 and a second substrate 550 disposed opposite to each other, a first conductor layer and a second conductor layer 540 located between the first substrate 510 and the second substrate 550, and a first insulating layer 530 located between the first conductor layer and the second conductor layer 540. The second conductor layer 540 is located on a side of the first conductor layer facing away from the first substrate 510, and a first circuit layer 560 is located on a side of the first substrate 510 facing away from the second substrate 550. The above description with reference to Figure 4 FIG. Figure 4 also applies to the display device 500, except that in Figure 5 FIG. Figure 5 and Figure 6In the display device 500 shown, the first conductor layer of the circuit board includes a first sub-layer 515 and a second sub-layer 525, and the energy coil includes a first energy sub-coil 611, a second energy sub-coil 612, and a third energy sub-coil 613 connected in series. For ease of description, the different parts will be mainly described in detail below.

[0101] Combined with Figure 5 and Figure 6 shown, the first sub-layer 515 is located on the side of the second sub-layer 525 away from the second conductor layer 540. In some embodiments, a second insulating layer 570 may be provided between the first sub-layer 515 and the second sub-layer 525. The first energy sub-coil 611 and the second energy sub-coil 612 are located on the first sub-layer 515, and the third energy sub-coil 613 is located on the second sub-layer 525.

[0102] The first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 respectively have a first projection, a second projection, and a third projection on the first substrate 510 of the circuit board, where the first projection and the second projection do not overlap, and the third projection partially overlaps with the first projection and the second projection respectively. As Figure 6 shown, the circuit board has a rectangular shape, and the first projection of the first energy sub-coil 611, the second projection of the second energy sub-coil 612, and the third projection of the third energy sub-coil 613 are arranged along the length direction of the circuit board. In some embodiments, the first projection of the first energy sub-coil 611, the second projection of the second energy sub-coil 612, and the third projection of the third energy sub-coil 613 have a rectangular contour, the length of the rectangle is in the range of 45 mm to 50 mm, for example, 48 mm, and the width of the rectangle is in the range of 35 mm to 45 mm, for example, 40 mm.

[0103] In some embodiments, the number of turns of each of the first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 is between 2 and 4. For example, as Figure 6 shown, the number of turns of each of the first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 is 3. In some embodiments, the first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 are connected in series between the first end RFA+ and the second end RFA- of the energy coil. In some embodiments, as Figure 6 shown, the energy coil may further include some dummy coils Dummy for connecting external circuits or components.

[0104] Continuing to refer to in combination with Figure 5 and Figure 6, the data coil 614 extends along the edge region of the circuit board. The data coil 614 is located in the second conductor layer 540 of the circuit board, and the projection on the first substrate 510 of the circuit board has a rectangular profile. The length of the rectangle is in the range of 80 mm to 90 mm, for example, 86 mm, and the width of the rectangle is in the range of 50 mm to 60 mm, for example, 54 mm.

[0105] In some embodiments, the wire widths of the first energy sub-coil 611, the second energy sub-coil 612, the third energy sub-coil 613, and the data coil 614 are each in the range of 0.1 mm to 0.5 mm, for example, 0.3 mm. In some embodiments, the number of turns of the data coil 614 is between 1 and 3. For example, as Figure 6 shown, the number of turns of the data coil 614 is 2. In some embodiments, the data coil 614 is connected to the first ends RFB+ and RFB- of the data coil.

[0106] In some embodiments, as Figure 5 shown, the display device 500 may further include a non-contact identification component 580 for providing identification information of the display device 500. The non-contact identification component 580 may be located on the side of the second substrate 550 facing away from the first substrate 510, for example, disposed in the second circuit layer 580 on this side. In some embodiments, the non-contact identification component may be an M1 card.

[0107] In some embodiments, the display may be located on either side of the circuit board of the display device. For example, the display is located on the side of the first substrate 510 facing away from the second substrate 550.

[0108] Through the display device provided by the present disclosure, the voltage that the energy coil and the data coil can provide is about 5V to 5.5V. Additionally, designing the data coil to be arranged almost along the entire edge of the circuit board can enhance the user experience, enabling mutual induction between the inductive coil of the user's terminal device and the data coil of the display device. Especially when the user is unsure of the position of the inductive coil of their terminal device, setting an inductive coil with a larger wiring range in the display device can more quickly improve the success rate of data transmission. And dividing the energy coil into three or more coils for energy collection is mainly to ensure the continuous supply of energy when refreshing the display, allowing the user's terminal device to effectively collect and supply energy at any position, and at the same time ensuring that the user's terminal device can stably collect and supply energy when moving arbitrarily within the energy coil of the display device. Compared with conventional passive display devices that can only achieve black-and-white refreshing of displays below 3.7 inches, the embodiments of the present disclosure can achieve black-and-white-and-red passive refreshing of display devices of 4.2 inches and below.

[0109] Figure 7The flowchart of the control method of the display device according to an embodiment of the present disclosure is shown. The control method can be executed by a server, and the display device can be the display device in any of the above embodiments, such as display devices 100, 200, 300, 400, and 500.

[0110] The method 700 includes step S710 to step S730.

[0111] In step S701, in response to receiving a non-contact identification request including the identification information of the display device, it is determined whether the identification information in the non-contact identification request matches the pre-stored identification information.

[0112] For example, when the user uses the display device, the display device is brought close to the client (such as a mobile phone and various smart terminals for providing services, etc.). The client reads the identification information (such as the ID of the display device) from the non-contact identification component (including the non-contact identification coil and the non-contact identification circuit) in the display device and includes it in the request and provides it to the server. The server determines whether the read identification information matches the identification information stored in the server's database.

[0113] In step S702, in response to the identification information in the non-contact identification request matching the pre-stored identification information, it is determined whether the non-contact identification request is a write request.

[0114] In step S703, in response to the non-contact identification request being a write request, a write control command is generated, and the write control command is used to control the client to write display data to the near-field communication circuit of the display device.

[0115] For example, if the identification information in the request from the client matches the identification information stored in the server's database, the server determines whether the request from the client is a read request or a write request. If it is a read request, the server reads the identification information and performs subsequent processing according to the read identification information, such as but not limited to access control, etc. If it is a write request, the server controls the client to perform a data writing operation on the display device.

[0116] Figure 8 The flowchart of the control method of the display device according to another embodiment of the present disclosure is shown. The control method can be executed by the client, and the display device can be the display device in any of the above embodiments, such as display devices 100, 200, 300, 400, and 500.

[0117] The method 800 includes step S810 to step S830.

[0118] In step S810, obtain the identification information of the display device from the non-contact identification component of the display device.

[0119] In step S820, include the identification information in a non-contact identification request and send it to the server.

[0120] In step S830, in response to receiving a write control command from the server, provide a signal containing display data to the near-field communication circuit of the display device according to the write control command.

[0121] In some embodiments, the method 800 may further include: step 840 and step 850.

[0122] In step 840, after providing a signal containing display data to the near-field communication circuit of the display device, in response to receiving first feedback information indicating data transmission failure from the display device, determine whether the number of times of receiving the first feedback information is less than a preset threshold. If so, return to step 830 to perform the operation of providing a signal containing display data to the near-field communication circuit of the display device. If not, perform step 850 to output a first result indicating data transmission failure to the server.

[0123] In some embodiments, the method 800 may further include step 860.

[0124] In step 860, after providing a signal containing display data to the near-field communication circuit of the display device, in response to receiving second feedback information indicating display refresh failure from the display device, output a second result indicating display refresh failure to the server.

[0125] For example, in response to receiving a write control command from the server, the client sends electromagnetic waves to power the display device, and then sends write data to the near-field communication circuit of the display device via the data coil of the display device. If the client receives information indicating data write failure from the display device, it determines whether the number of times of receiving the information indicating data write failure is less than a preset threshold. If so, the client resends the write data to the near-field communication circuit of the display device. If it is above the preset threshold, the client outputs information indicating data write failure to the server. If the client receives information indicating display screen refresh failure from the display device, it directly sends the information to the server.

[0126] Figure 9 An example diagram of a control method for a display device according to an embodiment of the present disclosure is shown. The display device may be the display device in any of the above embodiments, such as display devices 100, 200, 300, 400, and 500.

[0127] The method 900 includes steps S901 to step 913.

[0128] In step 901, the client obtains the identification information of the display device. For example, when the display device is close to the client, the client can detect and obtain the identification information (such as ID) in the non-contact identification component of the display device.

[0129] In step 902, in response to receiving the identification information of the display device, the client includes the identification information in a non-contact identification request and sends it to the server.

[0130] In step 903, in response to receiving the non-contact identification request containing the identification information of the display device, the server determines whether the identification information in the non-contact identification request matches the identification information pre-stored in its server. In response to the identification information in the non-contact identification request matching the pre-stored identification information, it is determined whether the non-contact identification request is a write request. If the non-contact identification request is a read request, corresponding operations are performed according to the identification information. If the non-contact identification request is a write request, step S904 is executed. If the non-contact identification request is a read request, the server can save the identification information for subsequent operations such as authentication, access control, etc.

[0131] In step S904, the server generates a write control command for controlling the client to write display data to the near-field communication circuit of the display device, and sends the write control command to the client.

[0132] In step 905, in response to receiving the write control command from the server, the client provides a signal containing display data to the near-field communication circuit of the display device according to the write control command.

[0133] In step 906, the near-field communication circuit of the display device obtains the data signal sent by the client through the data coil, and provides the data signal to the processor of the display device. The processor converts the data signal into display data, and determines whether the data transmission is successful according to the data volume of the display data. If the data transmission fails, step S907 is executed; if the data transmission is successful, step S910 is executed.

[0134] In step S907, the display device outputs first feedback information indicating data transmission failure to the client through the near-field communication circuit and the data coil.

[0135] In step 908, in response to receiving first feedback information indicating data transmission failure from the display device, the client determines whether the number of times the first feedback information is received is less than a preset number of times, such as 3 times. If the number of data transmission failures is less than three times, step S905 is re-executed, that is, a signal containing display data is provided to the near-field communication circuit of the display device again. If the number of data transmission failures reaches three or more times, step S909 is executed.

[0136] In step S909, the client outputs a first result indicating data transmission failure to the server.

[0137] In step S910, the processor of the display device uses the display data to control the display of the display device, that is, refreshes the display screen of the display device. If the refresh of the display screen of the display fails, step S911 is executed.

[0138] In step S911, the display device outputs second feedback information indicating display refresh failure to the client.

[0139] In step S912, in response to receiving the second feedback information indicating display refresh failure from the display device, the client outputs a second result indicating display refresh failure to the server.

[0140] Those skilled in the art can understand that the embodiments described above are all exemplary, and those skilled in the art can make improvements to them. The structures described in various embodiments can be freely combined without conflicts in structure or principle.

[0141] After the preferred embodiments of the present disclosure are described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the appended claims, and the present disclosure is not limited to the implementation manners of the exemplary embodiments described in the specification.

Claims

1. A display device, comprising: A display; An energy coil having a first end for providing a power supply voltage and a second end for providing a reference voltage; A processor connected to the first end and the second end of the energy coil, the processor being configured to be powered by the power supply voltage and the reference voltage and to generate a control signal based on the power supply voltage; An energy storage circuit connected to the first end of the energy coil for storing energy based on the power supply voltage; A voltage control circuit connected to the display, the processor, and the first end of the energy coil for supplying power to the display based on the potential of the first end of the energy coil under the control of the control signal generated by the processor; The display device further includes a circuit board having a first substrate and a second substrate disposed opposite to each other and a first conductor layer located between the first substrate and the second substrate; The energy coil includes a first energy sub-coil, a second energy sub-coil, and a third energy sub-coil connected in series. The first conductor layer of the circuit board includes a first sub-layer and a second sub-layer. The first sub-layer is located on a side of the second sub-layer away from the second substrate, and a second insulating layer is provided between the first sub-layer and the second sub-layer. Wherein, The first energy sub-coil and the second energy sub-coil are located on the first sub-layer, and the third energy sub-coil is located on the second sub-layer; The first energy sub-coil, the second energy sub-coil, and the third energy sub-coil respectively have a first projection, a second projection, and a third projection on the first substrate of the circuit board, wherein the first projection and the second projection do not overlap, and the third projection partially overlaps with the first projection and the second projection respectively.

2. The display device according to claim 1, further comprising: A data coil having a first end for providing a first data voltage and a second end for providing a second data voltage; A near-field communication circuit connected to the processor, the first end of the energy coil, the second end of the energy coil, the first end of the data coil, and the second end of the data coil. The near-field communication circuit is configured to be powered by the power supply voltage and the reference voltage, generate a data signal based on the first data voltage and the second data voltage, and provide the generated data signal to the processor; The processor is further connected to the display, and the processor is further configured to control the display to perform display based on the data signal provided by the near-field communication circuit.

3. The display device according to claim 1, wherein, The energy storage circuit includes a plurality of capacitors connected in parallel. The first pole of each capacitor is connected to the first end of the energy coil, and the second pole of each capacitor is grounded.

4. The display device according to claim 3, wherein, The plurality of capacitors include a first capacitor, a second capacitor, and a third capacitor. The first poles of the first capacitor, the second capacitor, and the third capacitor are all connected to the first end of the energy coil, and the second poles of the first capacitor, the second capacitor, and the third capacitor are all grounded.

5. The display device according to claim 1, wherein, The voltage control circuit includes: An inductor, the first end of the inductor is connected to the first end of the energy coil, and the second end of the inductor L1 is respectively connected to the first pole of a diode and the first pole of a transistor; A transistor, wherein a control electrode of the transistor is connected to a processor, a first pole of the transistor is connected to a second end of an inductor, and a second pole of the transistor is grounded; A diode, wherein a first pole of the diode is connected to the second end of the inductor, and a second pole of the diode is connected to a display.

6. The display device according to claim 5, wherein, The voltage control circuit further includes: A first resistor connected between the processor and the control electrode of the transistor; A second resistor connected to the second pole of the transistor.

7. The display device according to claim 5, wherein, The processor is configured to generate a control signal for turning off the transistor in response to the power supply voltage being higher than a preset threshold.

8. The display device according to claim 2, wherein the circuit board has a second conductor layer located between the first substrate and the second substrate and a first insulating layer located between the first conductor layer and the second conductor layer, and the second conductor layer is located on a side of the first conductor layer away from the first substrate, wherein, The data coil is located on the second conductor layer of the circuit board; The processor, the energy storage circuit, the voltage control circuit, and the near-field communication circuit are located on a side of the first substrate away from the second substrate.

9. The display device according to claim 8, wherein, The circuit board has a rectangular shape, and the first projection, the second projection, and the third projection are arranged along the length direction of the circuit board; The first projection, the second projection, and the third projection have a rectangular contour.

10. The display device according to claim 9, wherein, The projection of the data coil on the first substrate of the circuit board has a rectangular contour.

11. The display device according to claim 8, wherein, Each of the first energy sub-coil, the second energy sub-coil, and the third energy sub-coil has 2 to 4 turns, and the data coil has 1 to 3 turns.

12. The display device according to claim 8, wherein, The data coil extends along the edge region of the circuit board.

13. The display device according to claim 12, wherein, The projection of the data coil on the first substrate of the circuit board has a rectangular contour.

14. The display device according to claim 8, further including a non-contact identification component located on a side of the second substrate away from the first substrate, and the non-contact identification component is configured to provide identification information of the display device.

15. The display device according to claim 8, wherein, The display is located on a side of the first substrate away from the second substrate.

16. The display device according to any one of claims 1 to 15, wherein, The display is an electronic paper display.

17. The display device according to any one of claims 1 to 15, wherein, The processor is further configured to: Convert a data signal received from the near-field communication circuit into display data; Determine whether data transmission is successful according to the data volume of the display data; In response to successful data transmission, use the display data to control the display to perform a display.

18. The display device according to claim 17, wherein, The processor is further configured to: In response to a data transmission failure, control the near-field communication circuit to output first feedback information indicating the data transmission failure through the data coil; In response to receiving a data signal from the near-field communication circuit again, return to perform the operation of converting the received data signal into display data; And After using the display data to control the display to perform a display, in response to receiving a feedback signal indicating a display refresh failure from the display, control the near-field communication circuit to output second feedback information indicating the display refresh failure through the data coil.

19. A control method for a display device executed by a server, where the display device is the display device according to any one of claims 1 to 18, and the method includes: Responding to a non-contact identification request containing the identification information of the display device, determining whether the identification information in the non-contact identification request matches the pre-stored identification information; Responding to the identification information in the non-contact identification request matching the pre-stored identification information, determining whether the non-contact identification request is a write request; Responding to the non-contact identification request being a write request, generating a write control command for controlling the client to write display data to the near-field communication circuit of the display device.

20. A control method for a display device executed by a client, where the display device is the display device according to any one of claims 1 to 18, and the method includes: Obtaining the identification information of the display device from the non-contact identification component of the display device; Including the identification information in a non-contact identification request and sending it to the server; Responding to receiving a write control command from the server, providing a signal containing display data to the near-field communication circuit of the display device according to the write control command.

21. The method according to claim 20, further comprising: After providing a signal containing display data to the near-field communication circuit of the display device, Responding to receiving first feedback information indicating data transmission failure from the display device, determining whether the number of times of receiving the first feedback information is less than a preset threshold; Responding to the number of times of receiving the first feedback information being less than the preset threshold, returning to execute the operation of providing a signal containing display data to the near-field communication circuit of the display device.

22. The method according to claim 21 further comprises: Responding to the number of times of receiving the first feedback information being greater than or equal to the preset threshold, outputting a first result indicating data transmission failure to the server.

23. The method according to claim 22 further comprises: After providing a signal containing display data to the near-field communication circuit of the display device, responding to receiving second feedback information indicating display refresh failure from the display device, outputting a second result indicating display refresh failure to the server.

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