Electronic table card system

By introducing controller and data cable connections into the electronic table card system, the traditional electronic table card battery life problem is solved, more efficient information update and synchronization is achieved, and management and maintenance are simplified.

CN222896520UActive Publication Date: 2025-05-23SHENZHEN ELECTRONIC PAPER TECH CO LTD
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Patent Information

Application Number
CN202421448076.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-24
Publication Date
2025-05-23
Estimated Expiration
2034-06-24

AI Technical Summary

Technical Problem

Traditional electronic table cards rely on battery power, which leads to battery life problems, especially in long-term use scenarios that require frequent replacement of batteries, which is inconvenient to use.

Method used

An electronic table card system is adopted, which includes a controller and multiple electronic table card. The controller receives display signals through a smart terminal and electrically connects it to the electronic table card through a data cable to refresh the display content and power supply.

Benefits of technology

It solves the battery life of traditional electronic table cards, reduces interruptions and interference, improves the efficiency of information update and synchronization, and simplifies the management and maintenance of electronic table cards.

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Abstract

The utility model relates to an electronic table card system. The electronic table card system comprises a controller which is used for being connected with an intelligent terminal, transmitting a display signal of the intelligent terminal to an electronic table card and supplying power to the electronic table card for refreshing display content; the electronic table cards are electrically connected with the controller, each electronic table card comprises a table card body and at least one electronic paper display screen arranged on the table card body, and the electronic table card displays display content corresponding to the display signals through the at least one electronic paper display screen. According to the scheme provided by the invention, the endurance problem caused by the fact that a traditional electronic table card depends on battery power supply can be solved, interruption and interference of the electronic table card in the using process are reduced, information updating and synchronization are more efficient, and the convenience and efficiency of electronic table card management are effectively improved.
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Description

Technical Field

[0001] The present application relates to the technical field of electronic table cards, and in particular to an electronic table card system. Background Art

[0002] In modern conferences and business events, traditional paper place cards are gradually being replaced by electronic place cards due to their disadvantages such as one-time use, waste of resources, and lack of flexibility.

[0003] In the related art, electronic table signs are generally powered by batteries. Due to battery life issues, when used in scenarios with longer durations, such as large-scale meetings or continuous meetings, they need to be replaced frequently, which is inconvenient to use. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related technology, the present application provides an electronic table card system, which can solve the battery life problem faced by traditional electronic table cards that rely on battery power, reduce interruptions and interference during the use of electronic table cards, and make information updating and synchronization more efficient, effectively improving the convenience and efficiency of managing electronic table cards.

[0005] The first aspect of the present application provides an electronic table card system, comprising:

[0006] A controller, used to connect to a smart terminal and transmit a display signal of the smart terminal to the electronic table card, and to supply power to the electronic table card for refreshing display content; and

[0007] A plurality of electronic table cards electrically connected to the controller, each of the electronic table cards comprising: a table card body and at least one electronic paper display screen arranged on the table card body, the electronic table card displays display content corresponding to the display signal through the at least one electronic paper display screen.

[0008] In some embodiments, the electronic table card system further includes: a wiring harness structure disposed between the controller and the plurality of electronic table cards;

[0009] The wiring harness structure includes multiple connecting data lines; the controller is provided with multiple control output interfaces corresponding to the multiple electronic table cards; the multiple connecting data lines are correspondingly connected to the multiple control output interfaces and the multiple electronic table cards, so that the multiple electronic table cards correspond one-to-one with the multiple control output interfaces.

[0010] In some embodiments, each of the electronic table cards further includes: a data connection port disposed on the table card body, the data connection port being electrically connected to at least one of the electronic paper display screens, and the connecting data line being connected to the data connection port so that the electronic table card is electrically connected to the controller.

[0011] In some embodiments, the data connection port includes: one of a USB Type-A interface, a USB Type-B interface, a USB Type-C interface, a Mini USB interface, and a Micro USB interface.

[0012] In some embodiments, each of the electronic table signs includes two electronic paper display screens, and the data connection port is electrically connected to the two electronic paper display screens at the same time.

[0013] In some embodiments, the two electronic paper display screens are symmetrically arranged along two opposite directions.

[0014] In some embodiments, the controller further comprises:

[0015] A peripheral connection interface, used to connect to a smart terminal so as to receive a display signal of the smart terminal and an input voltage of the smart terminal;

[0016] A main control circuit unit electrically connected to the peripheral connection interface and a driving circuit unit electrically connected to the main control circuit unit; the main control circuit unit is used to control the driving circuit unit to call the corresponding driving waveform signal to output to the corresponding control output interface according to the display signal, so as to update the display content of the corresponding electronic table sign.

[0017] In some embodiments, the controller further comprises:

[0018] A power management unit; the power management unit is arranged between the peripheral connection interface and the main control circuit unit, and the power management unit is electrically connected to the peripheral connection interface, the main control circuit unit and the plurality of control output interfaces, respectively, and is used to convert the input voltage obtained by the peripheral connection interface and maintain a preset output voltage, to supply power to the main control circuit unit and\or to supply power to the plurality of electronic table signs through the plurality of control output interfaces via the plurality of connection data lines.

[0019] In some embodiments, multiple control output interfaces are bound to multiple unique identification information of the electronic table signs, so that the driving circuit unit calls the corresponding driving waveform signal and outputs it to the corresponding control output interface according to the unique identification information, so as to update the display content of the electronic table sign corresponding to the unique identification information.

[0020] In some embodiments, the electronic table card system further includes: a smart terminal, which is electrically connected to the controller and is used to send display information to the controller and provide input voltage so that the multiple electronic table cards display corresponding display content according to the display signal.

[0021] The technical solution provided by this application may have the following beneficial effects:

[0022] The technical solution of the present application adopts an electronic table sign with an electronic paper display screen and a controller to form an electronic table sign system. The electronic table sign does not need to be controlled by the controller for display content control and power supply, which solves the battery life problem faced by traditional electronic table signs that rely on battery power supply. In scenarios of long-term use, such as large meetings or continuous meetings, the electronic table sign no longer needs to replace batteries frequently, ensuring the stable operation of the electronic table sign during the meeting and reducing interruptions and interference. At the same time, the controller can be used to achieve "one-to-many" control management, that is, one controller can connect and manage multiple electronic table signs at the same time, making information updating and synchronization more efficient, effectively improving the convenience and efficiency of managing electronic table signs.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0025] Figure 1 It is a structural schematic diagram of the electronic table card system shown in the embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of an electronic table card system in an embodiment of the present application;

[0027] Figure 3 It is a schematic diagram of the structure of the controller in the electronic table card system shown in the embodiment of the present application.

[0028] Figure numerals: 100, controller; 110, control output interface; 120, peripheral connection interface; 130, main control circuit unit; 140, drive circuit unit; 150, power management unit; 200, electronic table sign; 210, table sign body; 220, electronic paper display; 230, data connection port; 300, wiring harness structure; 310, connecting data cable; 400, smart terminal. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0030] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0031] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In the related art, electronic table signs are generally powered by batteries. Due to the battery life problem, when used in scenarios with a long duration, such as large-scale meetings or continuous meetings, they need to be replaced frequently, which is inconvenient to use.

[0034] In response to the above problems, the embodiments of the present application provide an electronic table card system that can solve the battery life problem faced by traditional electronic table cards that rely on battery power, reduce interruptions and interference during the use of electronic table cards, and make information updates and synchronization more efficient, effectively improving the convenience and efficiency of managing electronic table cards.

[0035] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0036] Figure 1 It is a structural schematic diagram of the electronic table card system shown in the embodiment of the present application; Figure 2It is a schematic diagram of the structure of the electronic table card in the electronic table card system shown in the embodiment of the present application.

[0037] See also Figure 1 and Figure 2 The electronic table card system of the present application includes a controller 100 and a plurality of electronic table cards 200 .

[0038] The controller 100 is used to connect to the smart terminal (or external control terminal) and transmit the display signal of the smart terminal to the electronic table card, and is used to power the electronic table card for refreshing the display content. In other words, the controller 100 realizes the signal control and power supply functions at the same time.

[0039] A plurality of electronic table cards 200 are electrically connected to the controller 100. Specifically, each electronic table card 200 may include a table card body 210 and at least one electronic paper display screen 220 on which the table card body 210 is disposed. The table card body 210 may refer to the outer shell of the electronic table card 200. The table card body 210 may be made of metal or plastic, and the table card body 210 may be in a triangular prism shape or a T-shape. Of course, the table card body 210 may also be in other shapes, which are not limited here. The electronic table card 200 displays the display content corresponding to the display signal through at least one electronic paper display screen 220.

[0040] It should be understood that the electronic paper technology used by the electronic paper display screen 220 has a super-bistable characteristic. When the display content is not changed, that is, when the display screen does not need to be refreshed, the electronic paper display screen 220 can maintain the display content without consuming power. It can be understood that when the display content is not modified, the electronic paper display screen 220 does not need to be powered. By powering the electronic paper display screen 220 of the electronic table card 200 through the controller 100, a lightweight design of the electronic table card 200 can be achieved, and the super-bistable characteristic of the electronic paper display screen 220 can be used to avoid long-term power-on of the electronic paper display screen 220, that is, the electronic table card 200 only needs to be powered when the display content needs to be changed, thereby effectively extending the service life of the electronic table card 200.

[0041] The electronic table card system of the present application is electrically connected to multiple electronic table cards 200 through a controller 100. The controller 100 is used to connect to a smart terminal and receive a display signal. The controller 100 controls the multiple electronic table cards 200 to display display content corresponding to the display signal through their electronic paper display screens according to the display signal. At the same time, the multiple electronic table cards 200 are powered by the controller 100, so that the electronic table cards 200 do not need to be interrupted due to battery life issues during use.

[0042] Figure 3 It is a schematic diagram of the structure of the controller in the electronic table card system shown in the embodiment of the present application.

[0043] See also Figure 3 In some embodiments, the electronic table card system of the present application further includes a wiring harness structure 300 disposed between the controller 100 and the plurality of electronic table cards 200. Specifically, the wiring harness structure 300 includes a plurality of connection data lines 310, the controller 100 is provided with a plurality of control output interfaces 110 corresponding to the plurality of electronic table cards 200, and the plurality of connection data lines 310 are correspondingly connected to the plurality of control output interfaces 110 and the plurality of electronic table cards 200, so that the plurality of electronic table cards 200 correspond to the plurality of control output interfaces 110 one by one. It can be understood that the controller 100 is provided with multiple control output interfaces 110, and each control output interface 110 controls an electronic table card 200 and supplies power to the electronic table card 200. In this way, the difficulty of the controller 100 in controlling multiple electronic table cards 200 is effectively reduced. Moreover, through the one-to-one correspondence between the control output interface 110 and the electronic table card 200, each electronic table card 200 has a dedicated control output interface 110. Even when a large number of electronic table cards 200 are working at the same time, signal interference and power fluctuations between the electronic table cards 200 can be effectively avoided, thereby ensuring the stable operation of each table card and effectively improving the stability of the system during operation.

[0044] In some embodiments, each electronic table card 200 may also include a data connection port 230 disposed on the table card body 210, the data connection port 230 is electrically connected to at least one electronic paper display screen 220, and the connection data line 310 is connected to the data connection port 230, so that the electronic table card 200 is electrically connected to the controller 100. It can be understood that the electronic table card 200 is connected to the connection data line 310 through the data connection port 230, thereby realizing the electrical connection between the electronic table card 200 and the controller 100. In this way, the electronic table card 200 and the controller 100 are quickly and detachably connected, so that the same data connection port 230 can be replaced with different electronic table cards 200, and different electronic table cards can be replaced under different occasions and needs, which greatly improves the flexibility and adaptability of the electronic table card 200 when used. At the same time, it is convenient to maintain a single electronic table card 200 without affecting the operation of the entire system, thereby reducing the maintenance cost of the system. In some specific implementations, the data connection port 230 may include one of a USB Type-A interface, a USB Type-B interface, a USB Type-C interface, a Mini USB interface, and a Micro USB interface. In actual application, the electronic table card 200 may use different interface types according to actual application requirements.

[0045] In some embodiments, each electronic table card 200 includes two electronic paper display screens 220, and the data connection port 230 is electrically connected to the two electronic paper display screens 220 at the same time. It should be understood that the electronic table card 200 can realize the display control of the same content or different content on the two electronic paper display screens 220 through the data connection port 230. In other words, when the electronic table card 200 includes two electronic paper display screens 220, the electronic table card 200 can have two display areas corresponding to the two electronic paper display screens 220, and the electronic table card 200 can display the same or different display content through its two display areas. Among them, the sizes of the two electronic paper display screens 220 located on the same electronic table card 200 can be the same or different, which is not limited here. In some specific embodiments, the two electronic paper display screens 220 can be symmetrically arranged in two opposite directions. It can be understood that the two electronic paper display screens 220 on the same electronic table card 200 can be arranged in two opposite directions. For example, if the electronic table sign 200 has a relatively arranged side A (front) and side B (back), the two electronic paper display screens 220 can be respectively arranged on the side A (front) and side B (back), thereby realizing the double-sided display function of the electronic table sign 200, so that the user using the electronic table sign and other persons (such as other participants) can see the same or different display information displayed by the electronic table sign.

[0046] In some embodiments, the controller 100 may further include an external device connection interface 120, a main control circuit unit 130, and a driving circuit unit 140. The external device connection interface 120 is used to connect to an intelligent terminal so as to receive a display signal of the intelligent terminal and an input voltage of the intelligent terminal. The external device connection interface 120 may be provided on the table card body 210. The main control circuit unit 130 is electrically connected to the external device connection interface 120, and the driving circuit unit 140 is electrically connected to the main control circuit unit 130, wherein the main control circuit unit 130 is used to control the driving circuit unit 140 to call a corresponding driving waveform signal according to the display signal received by the external device connection interface 120, and output the driving waveform signal to the corresponding control output interface 110, so as to update the display content of the corresponding electronic table card 200. The main control circuit unit 130 is provided with a main control chip, and specifically, the main control chip in the related technology may be used to realize the control and data processing functions of the active circuit unit 130, which is not limited here.

[0047] Further, the peripheral connection interface 120 may include one of a USB Type-A interface, a USB Type-B interface, a USB Type-C interface, a Mini USB interface, and a Micro USB interface. Specifically, the peripheral connection interface 120 may use the same interface type as the data connection port 230 .

[0048] In some embodiments, the controller 100 further includes a power management unit 150. The power management unit 150 is disposed between the peripheral connection interface 120 and the main control circuit unit 130. The power management unit is electrically connected to the peripheral connection interface 120, the main control circuit unit 130, and a plurality of control output interfaces 110, respectively, and is used to convert the input voltage obtained by the peripheral connection interface 120 and maintain a preset output voltage, to supply power to the main control circuit unit 130, and / or to supply power to a plurality of electronic table cards 200 through a plurality of control output interfaces 110 via a plurality of connection data lines 310. Among them, the power management unit 150 can be provided with one or a combination of two or more of a rectifier circuit, a filter circuit, a voltage stabilizing circuit, and a protection circuit using relevant technologies. The power management unit 150 is used to convert the input voltage obtained by the peripheral connection interface 120, thereby realizing power supply to the controller 100 itself and the electronic table cards 200. That is to say, both the controller 100 and the electronic table card 200 do not need to be equipped with a power supply. When the display content of the electronic table card 200 needs to be changed, the smart terminal used for control is connected, and the input voltage is provided by the smart terminal to activate the electronic table card system, effectively reducing the system energy consumption, and the low-voltage power supply (such as 5V power supply) provided by the smart terminal can support the operation of the system. When the display content of the electronic table card 200 needs to be changed, the user only needs to connect to the smart terminal, and the input voltage provided by the terminal can activate the entire system, realizing plug-and-play, improving the convenience of user operation of the system, without the need for additional power configuration, simplifying the operation process, and further improving the convenience of system application.

[0049] In some embodiments, multiple control output interfaces 110 are bound to unique identification information of multiple electronic table cards 200, so that the driving circuit unit 140 calls the corresponding driving waveform signal and outputs it to the corresponding control output interface 110 according to the unique identification information, so as to update the display content of the electronic table card 200 corresponding to the unique identification information. Specifically, the unique identification information of the electronic table card 200 can be the ID code information of the electronic table card 200, and it should be understood that the ID code information is unique. When applying the electronic table card system of the present application, multiple control output interfaces 110 can be extended to different table card setting positions through multiple connecting data lines 310. It can be understood that by binding multiple control output interfaces 110 with the unique identification information of multiple electronic table cards 200, multiple electronic table cards 200 are bound to the table card setting positions. In this way, the installation position of the electronic table cards 200 is limited, that is, each electronic table card 200 is applied to the installation position, so as to facilitate independent use management and tracking of different electronic table cards 200, thereby improving the operational difficulty of system maintenance management. For example, the usage time of the electronic table card 200 at each installation position is tracked. When the usage time period reaches the preset maintenance period, the electronic table card 200 can be maintained or replaced individually. In addition, by binding the control output interface 110 with the unique identification information of the electronic table sign 200, the driving circuit unit 140 can output a driving waveform signal to the corresponding control output interface 110 according to the unique identification information, thereby achieving precise driving of the electronic table sign 200 and ensuring that the system accurately updates the display content of the electronic table sign 200 during the working process.

[0050] In some embodiments, the electronic table card system of the present application further includes an intelligent terminal 400, which is electrically connected to the controller 100, and is used to send display information to the controller 100 and provide input voltage so that the multiple electronic table cards 200 can display corresponding display content according to the display signal. Specifically, the intelligent terminal 400 can include a smart phone, a smart tablet, or a computer. Of course, the intelligent terminal 400 can also be other smart devices, which is not limited here.

[0051] In this embodiment, the electronic table sign system of the present application adopts an electronic table sign with an electronic paper display screen and a controller to form an electronic table sign system. The electronic table sign does not need to be controlled by the controller to display content and power the electronic table sign, which solves the battery life problem faced by traditional electronic table signs that rely on battery power supply. In scenarios where long-term use is used, such as large meetings or continuous meetings, electronic table signs no longer need to frequently replace batteries, ensuring stable operation of electronic table signs during meetings and reducing interruptions and interference. At the same time, the controller can be used to achieve "one-to-many" control management, that is, one controller can connect and manage multiple electronic table signs at the same time, making information updating and synchronization more efficient, effectively improving the convenience and efficiency of managing electronic table signs.

[0052] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0053] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electronic table card system, characterized in that: include: A controller, used to connect to a smart terminal and transmit a display signal of the smart terminal to an electronic table card, and to supply power to the electronic table card for refreshing display content; A plurality of electronic table cards electrically connected to the controller, each of the electronic table cards comprising: a table card body and at least one electronic paper display screen disposed on the table card body, the electronic table card displays display content corresponding to the display signal through the at least one electronic paper display screen; A wiring harness structure disposed between the controller and the plurality of electronic table signs; The wiring harness structure includes a plurality of connection data lines; the controller is provided with a plurality of control output interfaces corresponding to the plurality of electronic table cards; the plurality of connection data lines are correspondingly connected to the plurality of control output interfaces and the plurality of electronic table cards, so that the plurality of electronic table cards correspond one to one with the plurality of control output interfaces; The controller further comprises: A peripheral connection interface, used to connect to a smart terminal so as to receive a display signal of the smart terminal and an input voltage of the smart terminal; a main control circuit unit electrically connected to the peripheral connection interface and a driving circuit unit electrically connected to the main control circuit unit; the main control circuit unit is used to control the driving circuit unit to call a corresponding driving waveform signal to output to the corresponding control output interface according to a display signal, so as to update the display content of the corresponding electronic table card.

2. The electronic table card system according to claim 1, characterized in that: Each of the electronic table cards also includes: a data connection port arranged on the table card body, the data connection port is electrically connected to at least one of the electronic paper display screens, and the connecting data line is connected to the data connection port to electrically connect the electronic table card to the controller.

3. The electronic table card system according to claim 2, characterized in that: The data connection port includes: one of a USB Type-A interface, a USB Type-B interface, a USB Type-C interface, a Mini USB interface, and a Micro USB interface.

4. The electronic table card system according to claim 2, characterized in that: Each of the electronic table signs includes two electronic paper display screens, and the data connection port is electrically connected to the two electronic paper display screens at the same time.

5. The electronic table card system according to claim 1, characterized in that: The two electronic paper display screens are symmetrically arranged along two opposite directions.

6. The electronic table card system according to claim 1, characterized in that: The controller further comprises: A power management unit; the power management unit is arranged between the peripheral connection interface and the main control circuit unit, and the power management unit is electrically connected to the peripheral connection interface, the main control circuit unit and the plurality of control output interfaces, respectively, and is used to convert the input voltage obtained by the peripheral connection interface and maintain a preset output voltage, to supply power to the main control circuit unit and\or to supply power to the plurality of electronic table signs through the plurality of control output interfaces via the plurality of connection data lines.

7. The electronic table card system according to claim 1, characterized in that: The multiple control output interfaces are bound to the unique identification information of the multiple electronic table signs, so that the driving circuit unit calls the corresponding driving waveform signal and outputs it to the corresponding control output interface according to the unique identification information, so as to update the display content of the electronic table sign corresponding to the unique identification information.

8. The electronic table card system according to any one of claims 1 to 7, characterized in that: The electronic table card system also includes: an intelligent terminal, which is electrically connected to the controller and is used to send display information to the controller and provide input voltage so that the multiple electronic table cards display corresponding display content according to the display signal.