CN115410507A

CN115410507A - Display device and control method thereof

Info

Publication number: CN115410507A
Application number: CN202110596582.4A
Authority: CN
Inventors: 陈立春; 谢云燕; 程前庚; 余新波; 王涵; 刘波
Original assignee: BOE Technology Group Co Ltd; Chongqing BOE Smart Electronics System Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chongqing BOE Smart Electronics System Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-11-29

Abstract

The present disclosure provides a display device and a control method thereof, the display device including: a display; an energy coil having a first terminal for providing a supply voltage and a second terminal for providing a reference voltage; a processor connected to the first and second ends of the energy coil, the processor configured to be powered by the supply voltage and the reference voltage and to generate a control signal according to the supply voltage; the energy storage circuit is connected with the first end of the energy coil and used for storing energy according to the power supply voltage; and the voltage control circuit is connected with the display, the processor and the first end of the energy coil and used 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

Display device and control method thereof

Technical Field

The disclosure relates to the technical field of display, in particular to a display device and a control method thereof.

Background

The passive electronic chest card mainly adopts the working principle that energy conversion is carried out in the electromagnetic induction process, magnetic energy is converted into electric energy, and energy is stored by utilizing a farad capacitor so as to enable each module circuit in the electronic chest card to work. In general, a passive electronic chest card may have hidden troubles in a use process that in a conversion process of electric energy and magnetic energy, due to insufficient energy, data is lost in a data transmission process and a display picture is abnormally refreshed, so that poor product experience is brought to a user.

Disclosure of Invention

An embodiment of the present disclosure provides a display device including:

a display;

an energy coil having a first terminal for providing a supply voltage and a second terminal for providing a reference voltage;

a processor connected to the first and second ends of the energy coil, the processor configured to be powered by the supply voltage and the reference voltage and to generate a control signal according to the supply voltage;

the energy storage circuit is connected with the first end of the energy coil and used for storing energy according to the power supply voltage;

and the voltage control circuit is connected with the display, the processor and the first end of the energy coil and used 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.

For example, the display device further includes:

a data coil having a first terminal for supplying a first data voltage and a second terminal for supplying a second data voltage;

near field communication circuitry 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 circuitry configured to be powered by the supply voltage and the reference voltage, to generate a data signal from the first and second data voltages, and to provide the generated data signal to the processor;

the processor is also connected to the display, the processor being further configured to control the display to display in accordance with the data signals provided by the near field communication circuitry.

For example, the tank circuit comprises a plurality of capacitors connected in parallel, a first pole of each capacitor being connected to the first end of the energy coil and a second pole of each capacitor being connected to ground.

For example, the plurality of capacitors include a first capacitor, a second capacitor, and a third capacitor, 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 second poles of the first capacitor, the second capacitor, and the third capacitor are all grounded.

For example, the voltage control circuit includes:

the first end of the inductor is connected with the first end of the energy coil, and the second end of the inductor is respectively connected with the first pole of the diode and the first pole of the transistor;

a transistor, a control electrode of the transistor is connected to the processor, a first electrode of the transistor is connected with the second end of the inductor, and a second electrode of the transistor is grounded;

and a first pole of the diode is connected with the second end of the inductor, and a second pole of the diode is connected to the display.

For example, 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 a second pole of the transistor.

For example, the processor is configured to generate a control signal for turning off the transistor in response to the supply voltage being above a preset threshold.

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

the energy coil is positioned on a first conductor layer of the circuit board, and the data coil is positioned on a second conductor layer of the circuit board;

the processor, the tank 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.

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 disposed between the first sub-layer and the second sub-layer, wherein,

the first energy sub-coil and the second energy sub-coil are located in the first sub-layer, and the third energy sub-coil is located in the second sub-layer.

For example, the first, second and third energy sub-coils have a first projection, a second projection and a third projection, respectively, 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.

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

the first projection, the second projection, and the third projection have a rectangular outline.

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

For example, the data coil extends along an edge region of the circuit board.

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

For example, the display device further comprises a non-contact identification component located on a side of the second substrate facing away from the first substrate, the non-contact identification component being configured to provide identification information of the display device.

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

For example, the display is an electronic paper display.

For example, the processor is further configured to: converting a data signal received from the near field communication circuit into display data; determining whether the data transmission is successful according to the data amount of the display data; in response to a successful data transfer, controlling the display to display using the display data.

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

An embodiment of the present disclosure also provides a control method of a display apparatus performed by a server, the display apparatus being the display apparatus as described above, the method including:

in response to receiving a contactless identification request containing identification information of the display device, determining whether the identification information in the contactless identification request matches pre-stored identification information;

in response to the identification information in the non-contact identification request being matched with the pre-stored identification information, determining whether the non-contact identification request is a write request;

and in response to the non-contact identification request being a write request, generating a write control command, wherein the write control command is used for controlling a client to write display data into a near field communication circuit of the display device.

An embodiment of the present disclosure also provides a method of controlling a display apparatus executed by a client, the display apparatus being the display apparatus described above, the method including:

acquiring identification information of the display device from a non-contact identification component of the display device;

the identification information is contained in a non-contact type identification request and is sent to a server;

in response to receiving a write control command from a server, a signal including display data is provided to near field communication circuitry of the display device in accordance with the write control command.

For example, the method further comprises: after providing signals including display data to near field communication circuitry of the display device,

in response to receiving first feedback information indicating data transmission failure from the display apparatus, determining whether the number of times the first feedback information is received is less than a preset threshold;

and in response to the number of times of receiving the first feedback information being less than a preset threshold value, returning to perform the operation of providing the signal containing the display data to the near field communication circuit of the display device.

For example, the method further comprises: and outputting a first result indicating data transmission failure to a server in response to the number of times of receiving the first feedback information being greater than or equal to a preset threshold value.

For example, the method further comprises: after providing a signal containing display data to near field communication circuitry of the display device, in response to receiving second feedback information from the display device indicating a display refresh failure, outputting a second result indicating a display refresh failure to a server.

Drawings

Fig. 1 illustrates a block diagram of a display device according to an embodiment of the present disclosure.

Fig. 2 illustrates a block diagram of a display device according to another embodiment of the present disclosure.

Fig. 3 illustrates a circuit diagram of a display device according to another embodiment of the present disclosure.

Fig. 4 illustrates a cross-sectional view of a display device according to an embodiment of the present disclosure.

Fig. 5 illustrates a cross-sectional view of a display device according to another embodiment of the present disclosure.

Fig. 6 shows a schematic plan view of the power coil and the data coil of the display device of fig. 5.

Fig. 7 illustrates a flowchart of a control method of a display apparatus according to an embodiment of the present disclosure.

Fig. 8 illustrates a flowchart of a control method of a display apparatus according to another embodiment of the present disclosure.

Fig. 9 is a diagram illustrating an example of a control method of a display apparatus according to an embodiment of the present disclosure.

Detailed Description

While the present disclosure will be described fully with reference to the accompanying drawings, which contain preferred embodiments of the disclosure, it is to be understood before this description that one of ordinary skill in the art can modify the disclosure described herein while obtaining the technical effects of the disclosure. Therefore, it should be understood that the above description is a broad disclosure to those of ordinary skill in the art and that the above description is not intended to limit the exemplary embodiments of the present disclosure.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagram form to simplify the drawing.

Further, in the description of the embodiments of the present disclosure, the terms "first level" and "second level" are used only to distinguish that the magnitudes of the two levels are different. In some embodiments, the "first level" may be an inactive level that turns on the associated transistor, and the "second level" may be an active level that turns off the associated transistor. Hereinafter, since the driving transistor is exemplified as the P-type thin film transistor, the "first level" is exemplified as the high level and the "second level" is exemplified as the low level.

The embodiment of the disclosure provides a display device, which can enable the display device to have sufficient energy supply in the working process, so that data can be normally transmitted and a display picture can be successfully refreshed.

As shown in fig. 1, the display device 100 includes an energy coil 110, a processor 120, a tank circuit 130, a voltage control circuit 140, and a display 150.

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

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

Tank circuit 130 is connected to a first terminal RFA + of the energy coil 110. The tank circuit 130 may store energy according to the supply voltage from the first terminal RFA +.

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 may supply power to the display 150 based on the potential of the first terminal RFA + of the energy coil 110 under the control of the control signal generated by the processor 120.

In operation, the energy coil 110 may generate a voltage based on the sensed electromagnetic signal, which may be stored by the tank circuit and power the processor 120. The processor 120, upon detecting that the voltage satisfies a predetermined condition (e.g., above a predetermined threshold), may 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, thereby enabling the display 150 to display.

In the display device provided by the embodiment of the disclosure, the energy storage circuit and the voltage control circuit controlled by the processor based on the power supply voltage are arranged, so that the display can be powered based on the power stored in the energy storage circuit under the control of the processor, and the influence on the display effect of the display due to insufficient or unstable voltage provided by the energy coil can be avoided.

As shown in fig. 2, similar to fig. 1, the display device 200 includes an energy coil 210, a processor 220, a tank circuit 230, a voltage control circuit 240, and a display 250. The above description with reference to fig. 1 is equally applicable to the display apparatus 200, except that the display apparatus 200 shown in fig. 2 further includes: a data coil 260 and near field communication circuitry 270. For the sake of simplifying the description, the following description will mainly explain the difference in detail.

Near field communication circuit 270 is connected to power coil 210, processor 220, and data coil 260, respectively. In some embodiments, processor 220 may be a microprocessor Unit (MCU).

The data coil 260 has a first terminal RFB + for supplying a first data voltage and a second terminal RFB-for supplying a second data voltage.

The near field communication circuit 270 is connected to the processor 220, the first terminal RFA of the energy coil 210 +, the second terminal RFA of the energy coil 210-, the first terminal RFB + of the data coil 260 and the second terminal RFB-of the data coil, respectively. The near field communication circuit 270 is powered by the power supply voltage and the reference voltage, generates a data signal according to a first data voltage from the first terminal RFB + of the data coil 260 and a second data voltage from the second terminal RFB-of the data coil 260, and provides the generated data signal to the processor 220. In some embodiments, near field communication circuitry 270 may be communicatively coupled to the processor 220 via an I2C protocol.

The processor 220 is connected to the first terminal RFA + and the second terminal RFA-of the energy coil 210. The processor 220 may be powered by a supply voltage from the first terminal RFA + and a reference voltage from the second terminal RFA-, and generate a control signal according to the supply voltage. The processor 220 is also coupled to the display 250, such as by a Serial Peripheral Interface (SPI) protocol to communicate with the display 250. Processor 250 may control display 250 to display in accordance with data signals received from near field communication circuitry 270.

In operation, the energy coil 210 may provide power to the processor 220 and the near field communication circuitry 270 based on the sensed electromagnetic signals. The data coil 260 may provide a data voltage to the near field communication circuit 270 based on the sensed electromagnetic signal. The near field communication circuit 270 may 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 power the display 250 based on the voltage provided by the energy coil 210 and controls the display 250 to be invisible according to the data signal received from the near field communication circuit 270.

For example, the processor 220, upon receiving a data signal from the near field communication circuit 270, may convert the data signal into display data and determine whether the data transmission was successful according to the data amount of the display data. If the data transfer is successful, the processor 220 may use the display data to control the display 250 to display. If the data transmission fails, the processor 220 may 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 the data signal from the near field communication circuit 270 again, the processor 220 may return to performing the operation of converting the received data signal into the display data to implement the data retransmission.

In some embodiments, the processor 220, after controlling the display 250 to display using the display data, may control the near field communication circuit 270 to output second feedback information indicating a display refresh failure through the data coil 260 if a feedback signal indicating a display refresh failure is received from the display 250.

In some embodiments, display 250 is an electronic paper display. The electronic paper has the characteristics of low power consumption, environmental protection, no eye injury and the like, can flexibly update display information as required, and supplies power to the electronic paper display by utilizing the energy coil, so that the display device 200 has greater display flexibility, is more environment-friendly and has lower power consumption.

As shown in fig. 3, similar to fig. 2, the display device 300 includes an energy coil 310, a processor 320, a tank circuit 330, a voltage control circuit 340, and a display 350. The above description with reference to fig. 2 is equally applicable to the display device 300.

As shown in fig. 3, the tank 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, a ceramic capacitor, an organic capacitor, and the like. In the example of fig. 3, the tank 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 end 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 GND). In some embodiments, the tank circuit 330 may also include any number of capacitors connected in parallel, e.g., more or less than three. The embodiment of the disclosure adopts a plurality of electric capacity and voltage control circuit to combine and realize energy storage and power supply, compares farad electric capacity that adopts in traditional technology, can provide sufficient and stable supply voltage for the display when reducing occupation space, saving cost.

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

A first end of the inductor L1 is connected to respective first poles of the first ceramic capacitor C1, the second ceramic capacitor C2, and the third ceramic capacitor C3, and a second end of the inductor L1 is connected to a first pole of the diode VD1 and a first pole of the transistor T1, respectively.

A first pole of the transistor T1 is connected to the second terminal of the inductor L1 and the first pole of the diode VD1, respectively, a second pole of the transistor T1 is grounded, and a control pole of the transistor is connected to the processor 320.

A first pole of the diode VD1 is connected to the second terminal of the inductor L1 and the first pole of the transistor T1, respectively, and a second pole of the diode VD1 is connected to the display 300.

In some embodiments, the voltage control circuit 340 may further include a first resistor R1 and a second resistor R2. The first resistor R1 may be connected between the processor 320 and the control electrode of the transistor T1, and the second resistor R2 may be connected between the second electrode of the transistor T2 and the ground GND. In some embodiments, voltage control circuit 340 may also include any number of resistors, e.g., more or less than two.

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

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

When the control signal is at the first level, the transistor T1 is turned on. The supply voltage at the first terminal RFA + of the energy coil 310 charges the first, second and third ceramic capacitors C1, C2, C3 and the inductor L1. At this time, since the transistor T1 is turned on, the first electrode of the diode VD1 is grounded, and thus the diode VD1 cannot be turned on.

When the control signal is at the second level, the transistor T1 is turned off. The first pole of the diode VD1 is no longer grounded. At this time, since the energy stored in the inductor L1 cannot change abruptly, the voltage across the inductor L1 and the power voltage at the first end RFA + of the energy coil 310 are overlapped to turn on the diode VD1, thereby supplying power to the display 350. The energy is stored by the inductor L1 and is provided for the load, the load capacity of a dynamic belt can be effectively improved, and the stable output of the power supply voltage can be ensured when the display picture of the display is refreshed.

Fig. 4 illustrates 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 embodiments described above, and therefore the description of the display device in any of the embodiments described above is equally applicable to the display device 400 of fig. 4.

As shown in fig. 4, 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 between the first substrate 410 and the second substrate 450, and a first insulating layer 430 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.

In some embodiments, the power coil of the display device 400 may be located at the first conductor layer 420 of the circuit board and the data coil of the display device 400 may be located at the second conductor layer 440 of the circuit board. By arranging the energy coil and the data coil in different layers, mutual interference between the inductor coils can be avoided.

As shown in fig. 4, 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 the processor, the tank circuit, the voltage control circuit, and the near field communication circuit of the display apparatus 400 may be disposed in the first circuit layer 460.

Fig. 5 illustrates a cross-sectional view of a display device according to another embodiment of the present disclosure. Fig. 6 shows a schematic plan view of the power coil and the data coil of the display device of fig. 5.

As shown in fig. 5 and 6, similar to fig. 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 between the first substrate 510 and the second substrate 550, and a first insulating layer 530 between the first conductor layer and the second conductor layer 540, the second conductor layer 540 being on a side of the first conductor layer facing away from the first substrate 510, and the first circuit layer 560 being on a side of the first substrate 510 facing away from the second substrate 550. The above description with reference to fig. 4 is equally applicable to the display device 500, except that, in the display device 500 shown in fig. 5 and 6, the first conductor layer of the circuit board includes the first sub-layer 515 and the second sub-layer 525, and the energy coil includes the first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 connected in series. For convenience of description, the following description will mainly explain the difference in detail.

As shown in fig. 5 and 6, the first sub-layer 515 is located on a side of the second sub-layer 525 facing away from the second conductor layer 540. In some embodiments, a second insulating layer 570 may be disposed between the first sub-layer 515 and the second sub-layer 525. The first and second

energetic sub-coils

611 and 612 are located at the first sub-layer 515 and the third energetic sub-coil 613 is located at the second sub-layer 525.

The first, second and third energy sub-coils 611, 612 and 613 respectively have a first projection, a second projection and a third projection on the first substrate 510 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. As shown in fig. 6, 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 a 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 profile with a length in the range of 45mm to 50mm, for example 48mm, and a width in the range of 35mm to 45mm, for example 40mm.

In some embodiments, the first, second and third energy sub-coils 611, 612 and 613 each have a number of windings between 2 and 4. For example, as shown in fig. 6, the first energy sub-coil 611, the second energy sub-coil 612, and the third energy sub-coil 613 each have a winding number of 3. In some embodiments, the first, second and third energy sub-coils 611, 612, 613 are connected in series between the first and second ends RFA + and RFA-of the energy coil. In some embodiments, as shown in fig. 6, the energy coil may further include some Dummy coils Dummy for connecting to external circuits or elements.

With continued reference to fig. 5 and 6 in combination, the data coil 614 extends along an edge region of the circuit board. The data coil 614 is located at the second conductor layer 540 of the circuit board and has a rectangular outline in projection on the first substrate 510 of the circuit board, the rectangle having a length in the range of 80mm to 90mm, for example 86mm, and a width in the range of 50mm to 60mm, for example 54mm.

In some embodiments, the line 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 0.1mm to 0.5mm, for example 0.3mm. In some embodiments, the number of turns of the data coil 614 is between 1 and 3. For example, as shown in fig. 6, the data coil 614 has 2 windings. In some embodiments, the data coil 614 is connected to first ends of the data coil RFB + and RFB-.

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

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 a side of the first substrate 510 facing away from the second substrate 550.

With the display device provided by the present disclosure, the power coil and the data coil can provide a voltage of about 5V to 5.5V. In addition, the data coil is designed to be arranged almost along the edge of the whole circuit board, so that the user experience can be improved, and mutual induction can be realized between the inductance coil of the terminal equipment of a user and the data coil of the display device. Especially, when a user does not determine the position of the inductance coil of the terminal equipment, the success rate of data transmission can be improved faster by arranging the inductance coil with a larger wiring range in the display device. The energy coil is divided into three or more coils for energy collection, mainly aiming at ensuring the continuous supply of energy when the display is refreshed, so that the user terminal equipment can effectively collect and supply energy at any position, and meanwhile, the stable collection and supply of the energy can be realized when the user terminal equipment moves in the energy coil of the display device at will. Embodiments of the present disclosure may enable black and white and red passive refresh of display devices of 4.2 inches and below, as compared to conventional passive display devices that can only enable black and white refresh of displays of 3.7 inches or less.

Fig. 7 illustrates a flowchart of a control method of a display apparatus according to an embodiment of the present disclosure. The control method may be performed by a server, and the display apparatus may be the display apparatus in any of the embodiments described above, such as the

display apparatuses

100, 200, 300, 400, and 500.

The method 700 includes steps S710 to S730.

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

For example, when a user uses a display device, the display device is brought close to a client (e.g., a mobile phone and various smart terminals for providing services, etc.), which reads identification information (e.g., an ID of the display device) from a contactless identification component (including a contactless identification coil and a contactless identification circuit) in the display device and provides it to a server in a request. The server judges whether the read identification information matches the identification information stored in the database of the server.

In step S702, it is determined whether the contactless identification request is a write request in response to the identification information in the contactless identification request matching the pre-stored identification information.

In step S703, in response to the contactless identification request being a write request, a write control command is generated, where the write control command is used to control a client to write display data into a near field communication circuit of the display device.

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

Fig. 8 illustrates a flowchart of a control method of a display apparatus according to another embodiment of the present disclosure. The control method may be performed by a client, and the display apparatus may be the display apparatus in any of the embodiments described above, such as the

display apparatuses

100, 200, 300, 400, and 500.

The method 800 includes steps S810 to S830.

In step S810, identification information of the display device is acquired from the contactless identification component of the display device.

In step S820, the identification information is included in the contactless identification request and transmitted to the server.

In step S830, in response to receiving a write control command from a server, a signal including display data is provided to a near field communication circuit of the display device according to the write control command.

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

At step 840, after providing a signal containing display data to near field communication circuitry of a display device, in response to receiving first feedback information from the display device indicating a data transmission failure, determining whether a number of times the first feedback information is received 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 circuitry of the display device. If not, step 850 is performed, outputting a first result indicating a data transfer failure to the server.

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

At step 860, a second result indicating a display refresh failure is output to a server in response to receiving second feedback information indicating a display refresh failure from the display device after providing a signal containing display data to near field communication circuitry of the display device.

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. And if the client receives the information indicating the data writing failure from the display device, judging whether the frequency of receiving the information indicating the data writing failure is less than a preset threshold value. If so, the client re-sends the write data to the near field communication circuit of the display device. And if the data write-in failure is higher than the preset threshold value, the client outputs information indicating data write-in failure to the server. And if the client receives information that the display screen fails to be refreshed from the display device, the client directly sends the information to the server.

Fig. 9 is a diagram illustrating an example of a control method of a display device according to an embodiment of the present disclosure. The display device may be the display device of any of the embodiments described above, such as

display devices

100, 200, 300, 400, and 500.

The method 900 includes steps S901 to 913.

In step 901, the client acquires identification information of the display device. For example, when the display device is in proximity to the client, the client may detect and retrieve identification information (e.g., an ID) in a contactless identification component of the display device.

In step 902, the client, in response to receiving the identification information of the display device, includes the identification information in a contactless identification request and transmits the contactless identification request to the server.

In step 903, the server determines, in response to receiving a contactless identification request containing identification information of a display device, whether the identification information in the contactless identification request matches identification information stored in advance in its server. And in response 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. And if the non-contact type identification request is a read request, performing corresponding operation according to the identification information. If the contactless identification request is a write request, step S904 is performed. If the contactless identification request is a read request, the server may store the identification information for subsequent operations, such as authentication, access control, and the like.

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 apparatus, and transmits the write control command to the client.

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

In step 906, the near field communication circuit of the display device acquires 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 amount of the display data, and if the data transmission is failed, step 907 is executed; if the data transmission is successful, step S910 is performed.

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

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

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

In step S910, the processor of the display apparatus uses the display data to control the display of the display apparatus to perform display, i.e., refresh the display screen of the display apparatus. If the display screen of the display fails to be refreshed, step S911 is performed.

In step S911, the display device outputs second feedback information indicating that the display refresh has failed to the client.

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

It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.

Having described preferred embodiments of the present disclosure in detail, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the appended claims, and the disclosure is not limited to the exemplary embodiments set forth herein.

Claims

1. A display device, comprising:

a display;

a processor connected to the first and second ends of the energy coil, the processor configured to be powered by the supply voltage and the reference voltage and to generate a control signal in dependence on the supply voltage;

2. The display device according to claim 1, further comprising:

near field communication circuitry 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 circuitry configured to be powered by the supply voltage and the reference voltage, to generate a data signal from the first data voltage and the second data voltage, and to provide the generated data signal to the processor;

the processor is also connected to the display, the processor being further configured to control the display to display in accordance with data signals provided by the near field communication circuitry.

3. The display device of claim 1, wherein the tank circuit comprises a plurality of capacitors connected in parallel, a first pole of each capacitor connected to the first end of the energy coil, and a second pole of each capacitor connected to ground.

4. The display device according to claim 3, wherein the plurality of capacitors comprises a first capacitor, a second capacitor, and a third capacitor, a 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 a second pole of each of the first capacitor, the second capacitor, and the third capacitor is connected to ground.

5. The display device according to claim 1, wherein the voltage control circuit comprises:

a first end of the inductor is connected with a first end of the energy coil, and a second end of the inductor L1 is respectively connected with a first pole of the diode and a first pole of the transistor;

a transistor, a control electrode of the transistor being connected to the processor, a first electrode of the transistor being connected to the second terminal of the inductor, a second electrode of the transistor being connected to ground;

6. The display device according to claim 5, wherein the voltage control circuit further comprises:

a second resistor connected to a second pole of the transistor.

7. A display apparatus according to claim 5, wherein the processor is configured to generate a control signal for switching the transistor off in response to the supply voltage being above a preset threshold.

8. The display device according to claim 2, further comprising a circuit board having a first substrate and a second substrate arranged opposite to each other, a first conductor layer and a second conductor layer between the first substrate and the second substrate, and a first insulating layer between the first conductor layer and the second conductor layer, the second conductor layer being located on a side of the first conductor layer facing away from the first substrate, wherein,

the processor, the tank 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.

9. A display device according to claim 8, wherein the energy coil comprises a first, a second and a third energy sub-coil connected in series, the first conductor layer of the circuit board comprises a first and a second sub-layer, the first sub-layer being on a side of the second sub-layer facing away from the second conductor layer, and a second insulating layer being provided between the first and second sub-layers, wherein,

the first energy sub-coil and the second energy sub-coil are located on the first sublayer, and the third energy sub-coil is located on the second sublayer.

10. The display device of claim 9, wherein the first, second and third energy sub-coils have a first projection, a second projection and a third projection, respectively, on a first substrate of the circuit board, wherein the first and second projections do not overlap, the third projection partially overlapping the first and second projections, respectively.

11. The display device of claim 10, wherein the circuit board has a rectangular shape, the first projection, the second projection, and the third projection are aligned along a length direction of the circuit board;

12. The display device of claim 9, wherein the first, second and third energy sub-coils each have 2 to 4 turns, and the data coil has 1 to 3 turns.

13. The display device of claim 8, wherein the data coil extends along an edge region of the circuit board.

14. A display device according to claim 11 or 13, wherein the projection of the data coil on the first substrate of the circuit board has a rectangular outline.

15. The display device of claim 8, further comprising a non-contact recognition component located on a side of the second substrate facing away from the first substrate, the non-contact recognition component configured to provide identification information of the display device.

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

17. A display device according to any one of claims 1 to 16, wherein the display is an electronic paper display.

18. The display device of any one of claims 1 to 17, wherein the processor is further configured to:

converting a data signal received from the near field communication circuit into display data;

determining whether the data transmission is successful according to the data amount of the display data;

in response to a successful data transfer, controlling the display to display using the display data.

19. The display device of claim 18, wherein the processor is further configured to:

in response to a data transmission failure, controlling the near field communication circuit to output first feedback information indicating the data transmission failure through the data coil;

in response to receiving the data signal from the near field communication circuit again, returning to perform the operation of converting the received data signal into display data; and

after controlling the display to display using the display data, in response to receiving a feedback signal from the display indicating a display refresh failure, controlling the near field communication circuit to output second feedback information indicating the display refresh failure through the data coil.

20. A control method of a display apparatus executed by a server, the display apparatus being the display apparatus according to any one of claims 1 to 19, the method comprising:

in response to receiving a non-contact recognition request containing identification information of the display device, determining whether the identification information in the non-contact recognition request matches pre-stored identification information;

determining whether a non-contact type identification request is a write request or not in response to identification information in the non-contact type identification request matching pre-stored identification information;

21. A control method of a display apparatus executed by a client, the display apparatus being the display apparatus according to any one of claims 1 to 19, the method comprising:

22. The method of claim 21, further comprising: after providing signals including display data to near field communication circuitry of the display device,

in response to receiving first feedback information indicating data transmission failure from the display apparatus, determining whether a number of times the first feedback information is received is less than a preset threshold;

and in response to the number of times of receiving the first feedback information being smaller than a preset threshold value, returning to execute the operation of providing the signal containing the display data to the near field communication circuit of the display device.

23. The method of claim 22, further comprising: and outputting a first result indicating data transmission failure to a server in response to the number of times of receiving the first feedback information being greater than or equal to a preset threshold value.

24. The method of claim 23, further comprising: after providing a signal containing display data to near field communication circuitry of the display device, in response to receiving second feedback information from the display device indicating a display refresh failure, outputting a second result indicating a display refresh failure to a server.