CN219392499U - Electronic table card management and control equipment control circuit and electronic table card management and control equipment - Google Patents
Electronic table card management and control equipment control circuit and electronic table card management and control equipment Download PDFInfo
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- CN219392499U CN219392499U CN202320254819.5U CN202320254819U CN219392499U CN 219392499 U CN219392499 U CN 219392499U CN 202320254819 U CN202320254819 U CN 202320254819U CN 219392499 U CN219392499 U CN 219392499U
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Abstract
The utility model discloses an electronic table card management and control device control circuit and an electronic table card management and control device, wherein the circuit comprises a main control MCU, a networking communication module, a key detection wake-up control circuit and a power management circuit, wherein a key detection end of the main control MCU is electrically connected with a key detection feedback end of the key detection wake-up control circuit, a driving output end of the main control MCU is electrically connected with a first enabling end of the power management circuit, a power receiving end of the main control MCU is electrically connected with a power output end of the power management circuit, a table card management and control end of the main control MCU is electrically connected with an internal communication end of the networking communication module, a power input end of the power management circuit is electrically connected with a power transmission end of an internal battery, and an external communication end of the networking communication module is used for communication connection with one or more electronic table cards. According to the electronic table card management and control device, the power can be supplied to the electronic table card management and control device through the internal battery, and a user can wake the electronic table card management and control device through keys to control the electronic table card to rapidly switch or refresh pictures without operating through a PC (personal computer) terminal.
Description
Technical Field
The utility model relates to the technical field of intelligent gateways, in particular to a control circuit of electronic table card management and control equipment and the electronic table card management and control equipment.
Background
Electronic table cards can realize table card information conversion, so that the electronic table cards gradually replace the traditional table cards and are widely applied to occasions such as conferences. And a manager of the electronic table cards can issue a command to the electronic table cards through the electronic table card management and control equipment, so that refreshing of display contents of the electronic table cards is realized. However, it is found in practice that the existing electronic table card management and control device generally uses a USB interface to supply power (such as an electronic table card gateway), or uses a PoE network cable to supply power (such as an electronic table card base station), once the USB interface or the PoE network cable is unplugged, the electronic table card management and control device immediately cuts off power and loses the management and control capability of the electronic table card, and because the electronic table card management and control device generally only has data forwarding capability, if the electronic table card picture needs to be temporarily switched or refreshed, the electronic table card must be managed and controlled by a computer terminal, and once the USB interface or the PoE network cable is unplugged, the electronic table card management and control device cannot receive an instruction issued by the computer terminal, so that the electronic table card cannot switch or refresh the picture.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the electronic table card management and control equipment control circuit and the electronic table card management and control equipment, which can reduce the situation that the electronic table card management and control equipment cannot control the electronic table card due to the fact that a USB interface or a PoE network cable is pulled out.
In order to solve the technical problems, the first aspect of the utility model discloses a control circuit of electronic table card management and control equipment, which comprises a main control MCU, a networking communication module, a key detection wake-up control circuit and a power management circuit, wherein:
the key detection end of the main control MCU is electrically connected with the key detection feedback end of the key detection wake-up control circuit, the driving output end of the main control MCU is electrically connected with the first enabling end of the power management circuit, the power receiving end of the main control MCU is electrically connected with the power output end of the power management circuit, the table board management end of the main control MCU is electrically connected with the internal communication end of the networking communication module, the power input end of the power management circuit is used for being electrically connected with the power transmission end of an internal battery, and the external communication end of the networking communication module is used for being in communication connection with one or more electronic table boards;
the main control MCU is used for sending a corresponding power supply enabling signal to the power supply management circuit when receiving a key wake-up signal fed back by the key detection wake-up control circuit;
the power supply management circuit is used for stabilizing the power supply provided by the internal battery according to the power supply enabling signal to obtain a stabilized voltage power supply, and outputting the stabilized voltage power supply through a power supply output end of the stabilized voltage power supply;
the main control MCU is also used for sending first table board control data matched with the key wake-up signal to the networking communication module after the power supply of the stabilized power supply is obtained;
the networking communication module is used for issuing table card control data to one or more electronic table cards, and the table card control data comprise the first table card control data.
As an optional implementation manner, in the first aspect of the present utility model, the circuit further includes an external interface J1 and a data communication circuit, where the external interface J1 includes a USB interface J2 and/or a network transmission interface J3, where:
the external connection end of the external connection interface J1 is used for electrically connecting external equipment or an external power supply, the data transmission end of the external connection interface J1 is electrically connected with the data input end of the data communication circuit, the power transmission end of the external connection interface J1 is electrically connected with the power input end of the power management circuit, and the data output end of the data communication circuit is electrically connected with the data input end of the main control MCU;
the power supply management circuit is also used for stabilizing the voltage of the external power supply provided by the external equipment or the external power supply to obtain a stabilized voltage power supply;
the main control MCU is further used for sending second table card control data input by the external equipment to the networking communication module after the power supply of the stabilized power supply is obtained, and the table card control data further comprises the second table card control data.
As an alternative implementation manner, in the first aspect of the present utility model, the driving output terminal of the key detection wake-up control circuit is electrically connected to the second enabling terminal of the power management circuit, where the key detection wake-up control circuit includes one or more key detection units, each of the key detection units includes a key switch S1, a first switching diode D1, a filter, a first resistor R1, and a switching device Q1, where:
the first end of the key switch S1 is electrically connected with the cathode of the first switch diode D1 and the first end of the filter, the second end of the key switch S1 is electrically connected with the first pole of the switch device Q1, the second end of the key switch S1 is also used for being electrically connected with the power transmission end of the internal battery, the anode of the first switch diode D1 is electrically connected with the key detection end of the main control MCU, the second end of the filter is electrically connected with the second pole of the switch device Q1 and the first end of the first resistor R1, the third pole of the switch device Q1 is electrically connected with the second enabling end of the power management circuit, and the second end of the first resistor R1 is used for being grounded.
As an optional implementation manner, in the first aspect of the present utility model, the power management circuit includes a power supply voltage stabilizing circuit, where the power supply voltage stabilizing circuit includes a voltage stabilizing chip U1, a first common cathode diode D2, and a second common cathode diode D3, where:
the first anode of the first common cathode diode D2 is electrically connected to the power transmission end of the internal battery, the second anode of the first common cathode diode D2 is electrically connected to the power transmission end of the USB interface J2 and the enabling end of the voltage stabilizing chip U1 and the common cathode of the second common cathode diode D3, the common cathode of the first common cathode diode D2 is connected to the power input end of the voltage stabilizing chip U1, the first anode of the second common cathode diode D3 is electrically connected to the driving output end of the key detection wake-up control circuit, the second anode of the second common cathode diode D3 is electrically connected to the driving output end of the main control MCU, and the power output end of the voltage stabilizing chip U1 is electrically connected to the power receiving end of the main control MCU.
As an optional implementation manner, in the first aspect of the present utility model, the power management circuit further includes a charging circuit, where the charging circuit includes a charging control chip U2, and where:
the power input end and the enabling end of the charging control chip U2 are electrically connected with the power transmission end of the USB interface J2, the power output end of the charging control chip U2 is electrically connected with the power transmission end of the internal battery and the power input end of the power management circuit, and the battery temperature detection end and the charging current setting detection end of the charging control chip U2 are electrically connected with the charging information output end of the internal battery.
As an optional implementation manner, in the first aspect of the present utility model, the power management circuit further includes a dc EMC circuit and an isolated switching power supply step-down module, where:
the power supply transmission end of the network transmission interface J3 is electrically connected with the power supply input end of the direct-current EMC circuit, the power supply output end of the current EMC circuit is electrically connected with the power supply input end of the isolating switch power supply voltage reduction module, and the power supply output end of the isolating switch power supply voltage reduction module is electrically connected with the power supply receiving end of the main control MCU.
As an alternative embodiment, in the first aspect of the present utility model, the circuit further comprises a status indication circuit, the status indication circuit comprising one or more first light emitting diodes D4, wherein:
each state indicating end of the main control MCU is electrically connected with the anode of one of the first light emitting diodes D4, and the cathode of each first light emitting diode D4 is grounded.
As an optional implementation manner, in the first aspect of the present utility model, the networking communication module includes a networking communication chip U3, where:
the internal communication end of the networking communication chip U3 is electrically connected with the table board management and control end of the main control MCU, the power supply receiving end of the networking communication chip U3 is electrically connected with the power supply output end of the power supply management circuit, and the external communication end of the networking communication chip U3 is used for being in communication connection with one or more electronic table boards.
As an optional implementation manner, in the first aspect of the present utility model, the networking communication module further includes a second light emitting diode D5, where:
the status indication end of the networking communication chip U3 is electrically connected with the anode of the second light emitting diode D5, and the cathode of the second light emitting diode D5 is used for grounding.
The second aspect of the utility model discloses electronic table card management and control equipment, which comprises the electronic table card management and control equipment control circuit disclosed in the first aspect of the utility model.
Compared with the prior art, the embodiment of the utility model has the following beneficial effects:
in the embodiment of the utility model, the control circuit of the electronic table card management and control equipment comprises a main control MCU, a networking communication module, a key detection wake-up control circuit and a power management circuit, wherein: the key detection end of the main control MCU is electrically connected with the key detection feedback end of the key detection wake-up control circuit, the driving output end of the main control MCU is electrically connected with the first enabling end of the power management circuit, the power receiving end of the main control MCU is electrically connected with the power output end of the power management circuit, the table card management and control end of the main control MCU is electrically connected with the internal communication end of the networking communication module, the power input end of the power management circuit is used for being electrically connected with the power transmission end of the internal battery, and the external communication end of the networking communication module is used for being in communication connection with one or more electronic table cards; the main control MCU is used for sending a corresponding power supply enabling signal to the power supply management circuit when receiving a key wake-up signal fed back by the key detection wake-up control circuit; the power supply management circuit is used for stabilizing the power supply provided by the internal battery according to the power supply enabling signal to obtain a stabilized voltage power supply, and outputting the stabilized voltage power supply through the power supply output end of the stabilized voltage power supply; the main control MCU is also used for sending first table board control data matched with the key wake-up signal to the networking communication module after the power supply of the stabilized power supply is obtained; the networking communication module is used for distributing the table card control data to one or more electronic table cards, wherein the table card control data comprises first table card control data. Therefore, the electronic table card management and control device can supply power to the electronic table card management and control device through the internal battery, so that the electronic table card management and control device can still work normally when the USB interface or the network transmission interface of the electronic table card management and control device is pulled out, and after a user wakes the electronic table card management and control device through keys, the electronic table card management and control device directly controls the electronic table card to quickly switch or refresh a picture, so that the electronic table card management and control device can realize the control of the electronic table card without operating through a PC end, the main control capability of the electronic table card management and control device is improved, and convenience in controlling the picture switching of the electronic table card is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a control circuit of an electronic table card management and control device according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a control circuit of an electronic table card management and control device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a master control MCU according to an embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a key detection wake-up control circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram of a power management circuit according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a power supply voltage stabilizing circuit according to an embodiment of the present utility model;
fig. 7 is a schematic diagram of a charging circuit according to an embodiment of the present utility model;
FIG. 8 is a schematic diagram of a status indication circuit according to an embodiment of the present utility model;
fig. 9 is a schematic structural diagram of a networking communication module according to an embodiment of the present utility model;
fig. 10 is a schematic structural diagram of an electronic table card management and control device according to an embodiment of the present utility model.
Detailed Description
For a better understanding and implementation, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, unless explicitly specified and limited otherwise, the term "electrically connected" in the description of the utility model and in the claims and in the above-mentioned figures should be understood in a broad sense, for example, as a fixed electrical connection, as a removable electrical connection, or as an integral electrical connection; can be mechanically and electrically connected or can be mutually communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, the terms first, second and the like in the description and in the claims of the utility model and in the foregoing figures, are used for distinguishing between different objects and not for describing a particular sequential order, and are not intended to cover any exclusive inclusion. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a control circuit of an electronic table card management and control device according to an embodiment of the present utility model. The control circuit of the electronic table card management and control device described in fig. 1 may be applied to control an electronic table card management and control device, such as an electronic table card gateway device, an electronic table card base station device, etc., and specifically may be directly applied to the electronic table card management and control device, or may be applied to a control system of the electronic table card management and control device, where embodiments of the present utility model are not limited. As shown in fig. 1, the control circuit of the electronic table card management and control device may include a main control MCU, a networking communication module, a key detection wake-up control circuit and a power management circuit, where:
the key detection end of the main control MCU is electrically connected with the key detection feedback end of the key detection wake-up control circuit, the driving output end of the main control MCU is electrically connected with the first enabling end of the power management circuit, the power receiving end of the main control MCU is electrically connected with the power output end of the power management circuit, the table card management and control end of the main control MCU is electrically connected with the internal communication end of the networking communication module, the power input end of the power management circuit is used for being electrically connected with the power transmission end of the internal battery, and the external communication end of the networking communication module is used for being in communication connection with one or more electronic table cards;
the main control MCU is used for sending a corresponding power supply enabling signal to the power supply management circuit when receiving a key wake-up signal fed back by the key detection wake-up control circuit;
the power supply management circuit is used for stabilizing the power supply provided by the internal battery according to the power supply enabling signal to obtain a stabilized voltage power supply, and outputting the stabilized voltage power supply through the power supply output end of the stabilized voltage power supply;
the main control MCU is also used for sending first table board control data matched with the key wake-up signal to the networking communication module after the power supply of the stabilized power supply is obtained;
the networking communication module is used for distributing the table card control data to one or more electronic table cards, and the table card control data can comprise first table card control data.
Optionally, the main control MCU may output a power enable signal to the power management circuit through the GPIO; the table card control data is used for controlling the electronic table card to switch or refresh the picture.
Alternatively, the internal battery may be a lithium battery, a lead-acid battery, or the like, which is not limited by the embodiment of the present utility model.
Therefore, the circuit described in fig. 1 can supply power to the electronic table card management and control device through the internal battery, so that the electronic table card management and control device can still work normally when the USB interface or the network transmission interface of the electronic table card management and control device is pulled out, and after a user wakes up the electronic table card management and control device through a key, the electronic table card management and control device can directly control the electronic table card to quickly switch or refresh the picture, so that the electronic table card management and control device can realize the control of the electronic table card without operating through a PC end, the main control capability of the electronic table card management and control device is improved, and the convenience of controlling the picture switching of the electronic table card is improved.
In an alternative embodiment, as shown in fig. 2, the circuit may further include an external interface J1 and a data communication circuit, where the external interface J1 may include a USB interface J2 and/or a network transmission interface J3, where:
the external connection end of the external connection interface J1 is used for being electrically connected with external equipment or an external power supply, the data transmission end of the external connection interface J1 is electrically connected with the data input end of the data communication circuit, the power transmission end of the external connection interface J1 is electrically connected with the power input end of the power management circuit, and the data output end of the data communication circuit is electrically connected with the data input end of the main control MCU;
the power supply management circuit is also used for stabilizing the voltage of external power supply provided by external equipment or external power supply to obtain a stabilized voltage power supply;
the main control MCU is also used for sending second table card control data input by the external equipment to the networking communication module after the power supply of the stabilized power supply is obtained, and the table card control data can also comprise second table card control data.
Therefore, the circuit described in the implementation fig. 2 also supports the external power supply and external control of the electronic table card management and control device through the external interface, so that the diversity and flexibility of the power supply mode of the electronic table card management and control device are improved, the electronic table card management and control device can work normally, the external interface is used for supporting the control of the electronic table card management and control device and the electronic table card, and the diversity and flexibility of the electronic table card picture switching mode are improved.
Optionally, the main control MCU is further configured to send third table card control data determined according to a preset space-time logic instruction to the networking communication module after power supply of the regulated power supply is obtained, where the table card control data may further include third table card control data.
In an alternative embodiment, as shown in fig. 2, the circuit may further include a storage unit, where a data transmission end of the storage unit is electrically connected to a storage data transmission end of the main control MCU, so that storage requirements of data, instructions and codes of the main control MCU can be met, support of program software is provided for the main control MCU, and clock logic control of the electronic table board management and control device is facilitated. Optionally, the storage content of the storage unit may include one or more picture frames, such as a propaganda frame and an advertisement frame, basic display information, such as a name of a person, an enterprise, a group, etc. corresponding to the corresponding position, and a table-board conference place configuration parameter list. The main control MCU can read the storage content in the main control MCU in a Flash mode.
Optionally, in the embodiment of the present utility model, the chip of the master MCU and the peripheral circuits (such as the serial data converters P1-P2) may refer to fig. 3, and optionally, the circuit may further include a reset circuit of the master MCU.
In another alternative embodiment, as shown in fig. 4, the driving output terminal of the key detection wake-up control circuit is electrically connected to the second enabling terminal (i.e. LDO EN terminal) of the power management circuit, where the key detection wake-up control circuit may include one or more key detection units, each of which may include a key switch S1, a first switching diode D1, a filter, a first resistor R1, and a switching device Q1, where:
the first end of the Key switch S1 is electrically connected with the cathode of the first switch diode D1 and the first end of the filter, the second end of the Key switch S1 is electrically connected with the first pole of the switch device Q1, the second end of the Key switch S1 is also used for being electrically connected with the power transmission end (namely VBat) of the internal battery, the anode of the first switch diode D1 is electrically connected with the Key detection end (namely Key1, key2 and Key 3) of the main control MCU, the second end of the filter is electrically connected with the second pole of the switch device Q1 and the first end of the first resistor R1, the third pole of the switch device Q1 is electrically connected with the second enabling end (namely LDO EN end) of the power management circuit, and the second end of the first resistor R1 is used for being grounded.
Alternatively, the push-button switch S1 may be replaced by a double-pole single-throw switch with one end grounded.
Alternatively, the switching device Q1 may be a triode, where the first pole of the switching device Q1 is the collector of the triode, the second pole of the switching device Q1 is the base of the triode, and the third pole of the switching device Q1 is the emitter of the triode.
It can be seen that, through the circuit described in fig. 4, when the key switch S1 is turned on, the reverse voltage of the cathode of the first switching diode D1 increases, the first switching diode D1 is turned off, the main control MCU detects the voltage difference or the current change through the key detection end, so as to obtain the key wake-up signal, and at the same time, the base current of the switching device Q1 increases, and the switching device Q1 is turned on, so that the key wake-up signal is enabled to the power management circuit through the LDO EN end, so that the accuracy and reliability of the key wake-up signal detection and the battery power supply enable can be improved.
In yet another alternative embodiment, as shown in fig. 4, the filter may be an RC filter, that is, the filter may include a second resistor R2 and a first capacitor C1, where a first end of the second resistor R2 is electrically connected to a first end of the first capacitor C1 and a first end of the push switch S1, a cathode of the first switching diode D1, and a second end of the second resistor R2 is electrically connected to a second pole of the switching device Q1 and a first end of the first resistor R1, and a second end of the first capacitor C1 is used for grounding.
Therefore, the RC filter can be used for filtering the high-frequency signal transmitted to the base electrode of the switching device Q1, so that the stability of the power supply enabling signal transmitted to the second enabling end of the power supply management circuit is improved, and the stability of power supply is further improved.
In yet another alternative embodiment, as shown in fig. 4, each key detection unit may further include a third resistor R3 and a fourth resistor R4, where a first end of the third resistor R3 is electrically connected to the second end of the key switch S1, and a second end of the third resistor R3 is electrically connected to the first pole of the switching device Q1; the first end of the fourth resistor R4 is electrically connected to the third pole of the switching device Q1 and the second enabling end of the power management circuit, and the second end of the fourth resistor R4 is grounded. It can be seen that the magnitude of the current and voltage transmitted to the switching device Q1 can be reduced by R3, the occurrence of breakdown of the switching device Q1 can be reduced, and the emitter can be prevented from being suspended by R4.
In yet another alternative embodiment, as shown in fig. 5, the power management circuit may include a power regulator circuit, and optionally, as shown in fig. 6, the power regulator circuit may include a regulator chip U1, a first common cathode diode D2, and a second common cathode diode D3, where:
the first anode of the first common cathode diode D2 is electrically connected to the power transmission end of the internal battery, the second anode of the first common cathode diode D2 is electrically connected to the power transmission end of the USB interface J2 and the enable end (i.e., EN pin) of the voltage stabilizing chip U1, the common cathode of the second common cathode diode D3 is electrically connected to the power input end (i.e., VIN pin) of the voltage stabilizing chip U1, the first anode of the second common cathode diode D3 is electrically connected to the driving output end (i.e., LDO EN) of the key detection wake-up control circuit, the second anode of the second common cathode diode D3 is electrically connected to the driving output end (i.e., LDO SET) of the main control MCU, and the power output end (i.e., VOUT pin) of the voltage stabilizing chip U1 is electrically connected to the power receiving end (i.e., V33) of the main control MCU.
As can be seen, through the circuit of fig. 6, when the USB interface J2 is not connected to the power supply, if the key detection wake-up control circuit detects that the user presses the key, the LDO EN end and the LDO SET end are SET high and flat, two diodes in the second common cathode diode D3 are both turned on, at this time, the voltage stabilizing chip U1 is enabled, the voltage stabilizing chip U1 stabilizes the power supply input by the internal battery through the VBat end and the first common cathode diode D2, and outputs the stabilized voltage-stabilized power supply (e.g., 3.3V power supply) through the Vout end; when the USB interface J2 is connected with a power supply, two diodes in the second common cathode diode D3 are cut off, the power supply connected with the USB interface is enabled to the voltage stabilizing chip U1, the voltage stabilizing chip U1 is used for stabilizing the power supply connected with the USB interface J2 and outputting the stabilized voltage-stabilized power supply through the Vout end, meanwhile, the power supply connected with the USB interface J2 enables the voltage of the common cathode of the second common cathode diode D3 to be higher than the voltage input by the internal battery through the VBat end, and the diode connected with the internal battery in the first common cathode diode D2 is cut off, so that the internal battery does not need to be powered.
In yet another alternative embodiment, as shown in fig. 6, the power supply voltage stabilizing circuit may further include a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth resistor R5, where:
the first end of the second capacitor C2 is electrically connected with the common cathode of the first common cathode diode D2 and the power input end of the voltage stabilizing chip U1, the first end of the third capacitor C3 is electrically connected with the power output end of the voltage stabilizing chip U1, the first end of the fourth capacitor C4 is electrically connected with the reference noise bypass end (namely BP pin) of the voltage stabilizing chip U1, and the second end of the second capacitor C2, the second end of the third capacitor C3 and the second end of the fourth capacitor C4 are all used for grounding; the first end of the fifth resistor R5 is electrically connected to the second anode of the first common cathode diode D2 and the power transmission end of the USB interface J2, and the second end of the fifth resistor R5 is electrically connected to the enable end of the voltage stabilizing chip U1 and the common cathode of the second common cathode diode D3.
Therefore, implementing the circuit of fig. 6, the second capacitor C2 may perform filtering processing on the power source connected to the USB interface J2 and the power source provided by the internal battery, and perform filtering processing on the power source output after voltage stabilization through the third capacitor C3, so as to improve the stability of the input/output power source, and the second capacitor may further perform discharging processing on the current in the loop at the moment of inserting or disconnecting the USB interface J2, so as to reduce the occurrence of the breakdown of the first common cathode diode D2, and in addition, the fifth resistor R5 may perform current limiting and voltage dividing processing on the power source connected to the USB interface J2, so as to reduce the occurrence of the breakdown of the second common cathode diode D3 and the occurrence of the overlarge voltage at the enabling end of the voltage stabilizing chip U1, and improve the security of the circuit element.
In yet another alternative embodiment, as shown in fig. 5, the power management circuit may further include a charging circuit, and optionally, as shown in fig. 7, the charging circuit may include a charging control chip U2, where:
the power input end and the enabling end of the charging control chip U2 are electrically connected with the power transmission end of the USB interface J2, the power output end of the charging control chip U2 is electrically connected with the power transmission end of the internal battery (namely the port 1 of CN 1) and the power input end of the power management circuit, and the battery temperature detection end and the charging current setting detection end of the charging control chip U2 and the charging information output end of the internal battery (namely the port 2 of CN 1) are grounded.
It can be seen that the circuit described in fig. 5 and fig. 7 can be inserted into the USB interface J2, and the charging control chip U2 can supply power to the electronic table board management and control device and charge the internal battery, so that the diversity and convenience of charging and power supply modes are improved.
In yet another alternative embodiment, as shown in fig. 7, the charging circuit may further include a fifth capacitor C5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, where a first end of the fifth capacitor C5 is electrically connected to the power output end of the charging control chip U2 and the power transmission end of the internal battery, and the power input end of the power management circuit, a first end of the sixth resistor R6 is electrically connected to the battery temperature detection end of the charging control chip U2, the seventh resistor R7 is electrically connected to the charging current setting detection end of the charging control chip U2, a second end of the fifth capacitor C5, a second end of the sixth resistor R6, and a second end of the seventh resistor R7 are all used for grounding, and a first end of the eighth resistor R8 is electrically connected to the power transmission end of the USB interface J2, and a second end of the eighth resistor R8 is electrically connected to the power input end of the charging control chip U2 and the enable end.
Therefore, the voltage and current of the power supply input to the charging control chip U2 can be reduced through the eighth resistor R8, the breakdown of the charging control chip U2 is reduced, the power supply input to the internal battery can be stabilized and filtered through the fifth capacitor C5, and the charging stability and safety are improved, so that the service life of the battery is prolonged, the power supply and voltage of the detection signal input to the charging control chip U2 can be reduced through the sixth resistor R6 and the seventh resistor R7, and the charging stability and safety are further improved.
In yet another alternative embodiment, as shown in fig. 7, the charge completion indicator (i.e., the charge ok pin) of the charge control chip U2 is used to electrically connect to the charge completion indicator, and the charge status indicator (i.e., the charge sta pin) of the charge control chip U2 is used to electrically connect to the charge status indicator.
Therefore, the charging condition of the internal battery can be displayed, and a user can conveniently determine whether the external power supply needs to be disconnected or not.
In yet another alternative embodiment, as shown in fig. 5, the power management circuit may further include a dc EMC circuit and an isolated switching power supply buck module, where:
the power supply transmission end of the network transmission interface J3 is electrically connected with the power supply input end of the direct-current EMC circuit, the power supply output end of the direct-current EMC circuit is electrically connected with the power supply input end of the isolating switch power supply voltage reduction module, and the power supply output end of the isolating switch power supply voltage reduction module is electrically connected with the power supply receiving end of the main control MCU.
Alternatively, the network transmission interface J3 may be a PoE interface.
Therefore, the circuit described in fig. 5 can be implemented by integrating the direct current EMC circuit and the isolating switch power supply voltage reducing module in the electronic table board management and control device, so that the situations of complicated equipment, inconvenient carrying, high system cost and high maintenance cost caused by the fact that a corresponding switch and a corresponding power plug are required to be equipped when a network transmission interface is used as a power supply are reduced, and the situations of current backflow and voltage mismatch can be reduced.
In yet another alternative embodiment, as shown in fig. 2, the circuit may further comprise a status indication circuit, optionally, as shown in fig. 8, the status indication circuit may comprise one or more first light emitting diodes D4, wherein:
each state indicating end of the main control MCU is electrically connected with anodes of one or more first light emitting diodes D4, and cathodes of the first light emitting diodes D4 are grounded.
Optionally, the status indication circuit may further include one or more ninth resistors R9, where each status indication terminal (i.e. LED1, LED2, LED3, LED4 pins) of the master MCU is electrically connected to a first terminal of one of the ninth resistors R9, and a second terminal of each of the ninth resistors R9 is electrically connected to an anode of one of the first light emitting diodes D4.
The main control MCU is also used for controlling the corresponding first light emitting diode of the key wake-up signal to lighten when the key wake-up signal matched first table control data is sent to the networking communication module, for example, the key wake-up signal corresponds to different broadcast instruction contents, each broadcast instruction content corresponds to different picture serial numbers, and the main control MCU controls the electronic table to display pictures corresponding to a certain broadcast instruction content and simultaneously controls the corresponding first light emitting diode of the broadcast instruction content to lighten as a state indicator lamp so as to facilitate the user to know the pictures of the current electronic table.
In yet another alternative embodiment, as shown in fig. 9, the networking communication module may include a networking communication chip U3, where:
the internal communication end of the networking communication chip U3 is electrically connected with the table card management and control end of the main control MCU (namely Zgb Tx and Zgb Rx pins), the power supply receiving end of the networking communication chip U3 is electrically connected with the power supply output end (namely V33) of the power supply management circuit, and the external communication end of the networking communication chip U3 is used for being in communication connection with one or more electronic table cards.
Optionally, the networking communication chip U3 may communicate with the electronic table board in a wired manner or a wireless manner, where the wireless manner may include a wireless long-distance communication manner or a wireless short-distance communication manner, and the wireless short-distance communication manner may include a bluetooth communication technique, a ZigBee communication technique, a UWB ultra-wideband communication technique, and the like, and the embodiment of the present utility model is not limited.
Preferably, the networking communication chip U3 can communicate with the electronic table card through the ZigBee communication technology, the networking communication chip U3 can adopt the ZigBee communication chip to obtain a wireless transparent transmission module integrating the ZigBee protocol stack, so that the self-networking and automatic networking are realized, and the data packet can be transmitted and forwarded in a transparent way, thereby the electronic table card management and control equipment does not need to know the network ID parameter of the new electronic table card, and can also automatically configure the newly networked electronic table card.
Optionally, the networking communication module further includes one or more sixth capacitors C6, the power receiving end of the networking communication chip U3 is electrically connected to the power output end of the power management circuit and the first end of each sixth capacitor C6, and the second end of each sixth capacitor C6 is used for grounding.
In yet another alternative embodiment, the networking communication module may further include a tenth resistor R10 and a seventh capacitor C7, where a first end of the tenth resistor R10 is electrically connected to the power output terminal of the power management circuit, a second end of the tenth resistor R10 is electrically connected to the reset terminal of the networking communication chip U3 and a first end of the seventh capacitor C7, and a second end of the seventh capacitor C7 is used for grounding.
It can be seen that implementing the circuit described in fig. 9 also enables the reset function to the networking communication chip U3 through the tenth resistor R10 and the seventh capacitor C7, so as to perform the reset when the networking communication chip U3 is abnormal.
In yet another alternative embodiment, as shown in fig. 9, the networking communication module may further include a second light emitting diode D5, where:
the status indication end (i.e. the LED5 pin) of the networking communication chip U3 is electrically connected to the anode of the second light emitting diode D5, and the cathode of the second light emitting diode D5 is used for grounding.
It can be seen that implementing the circuit described in fig. 9 can also show the operating state of the networking communication module through LEDs, so that the user can check the operating state of the networking communication module.
Example two
Referring to fig. 10, fig. 10 is a schematic structural diagram of an electronic table card management and control device according to an embodiment of the present utility model, and as shown in fig. 10, the electronic table card management and control device includes a control circuit of the electronic table card management and control device according to an embodiment of the present utility model.
Therefore, the electronic table card management and control device described in fig. 10 can supply power to the electronic table card management and control device through the internal battery, so that the electronic table card management and control device can still work normally when the USB interface or the network transmission interface of the electronic table card management and control device is pulled out, and after a user wakes up the electronic table card management and control device through a key, the electronic table card management and control device can directly control the electronic table card to quickly switch or refresh the picture, so that the electronic table card management and control device can realize the control of the electronic table card without operating through a PC end, the main control capability of the electronic table card management and control device is improved, and the convenience for controlling the picture switching of the electronic table card is improved.
The control circuit of the electronic table card management and control device and the electronic table card management and control device disclosed in the embodiments of the present utility model are described in detail, and specific embodiments are applied to illustrate the principles and implementation manners of the present utility model, but the preferred embodiments are not intended to limit the present utility model, and the description of the preferred embodiments is only used to help understand the method and core idea of the present utility model; also, it is apparent to those skilled in the art from this disclosure that many changes can be made in this embodiment and this application without departing from the spirit and scope of the utility model, which is set forth in the following claims.
Claims (10)
1. The utility model provides an electronic table tablet management and control equipment control circuit which characterized in that, the circuit includes master control MCU, network deployment communication module, button detection wake-up control circuit and power management circuit, wherein:
the key detection end of the main control MCU is electrically connected with the key detection feedback end of the key detection wake-up control circuit, the driving output end of the main control MCU is electrically connected with the first enabling end of the power management circuit, the power receiving end of the main control MCU is electrically connected with the power output end of the power management circuit, the table board management end of the main control MCU is electrically connected with the internal communication end of the networking communication module, the power input end of the power management circuit is used for being electrically connected with the power transmission end of an internal battery, and the external communication end of the networking communication module is used for being in communication connection with one or more electronic table boards;
the main control MCU is used for sending a corresponding power supply enabling signal to the power supply management circuit when receiving a key wake-up signal fed back by the key detection wake-up control circuit;
the power supply management circuit is used for stabilizing the power supply provided by the internal battery according to the power supply enabling signal to obtain a stabilized voltage power supply, and outputting the stabilized voltage power supply through a power supply output end of the stabilized voltage power supply;
the main control MCU is also used for sending first table board control data matched with the key wake-up signal to the networking communication module after the power supply of the stabilized power supply is obtained;
the networking communication module is used for issuing table card control data to one or more electronic table cards, and the table card control data comprise the first table card control data.
2. The electronic table card management and control device control circuit according to claim 1, characterized in that the circuit further comprises an external interface (J1) and a data communication circuit, the external interface (J1) comprising a USB interface (J2) and/or a network transmission interface (J3) wherein:
the external connection end of the external connection interface (J1) is used for electrically connecting external equipment or an external power supply, the data transmission end of the external connection interface (J1) is electrically connected with the data input end of the data communication circuit, the power transmission end of the external connection interface (J1) is electrically connected with the power input end of the power management circuit, and the data output end of the data communication circuit is electrically connected with the data input end of the main control MCU;
the power supply management circuit is also used for stabilizing the voltage of the external power supply provided by the external equipment or the external power supply to obtain a stabilized voltage power supply;
the main control MCU is further used for sending second table card control data input by the external equipment to the networking communication module after the power supply of the stabilized power supply is obtained, and the table card control data further comprises the second table card control data.
3. The electronic table card management and control device control circuit of claim 2, wherein a drive output of the key detection wake-up control circuit is electrically connected to a second enable of the power management circuit, wherein the key detection wake-up control circuit comprises one or more key detection units, each comprising a key switch (S1), a first switching diode (D1), a filter, a first resistor (R1) and a switching device (Q1), wherein:
the first end of key switch (S1) with the negative pole of first switch diode (D1) the first end electricity of wave filter is connected, the second end of key switch (S1) with the first pole electricity of switch device (Q1) is connected, the second end of key switch (S1) still is used for the electricity to connect the power transmission end of internal battery, the positive pole of first switch diode (D1) with master MCU' S button detection end electricity is connected, the second end of wave filter with the second pole of switch device (Q1) and the first end electricity of first resistance (R1) is connected, the third pole of switch device (Q1) with the second enabling end electricity of power management circuit is connected, the second end of first resistance (R1) is used for ground connection.
4. A control circuit of an electronic table card management and control device according to claim 3, wherein the power management circuit comprises a power supply voltage regulator circuit, wherein the power supply voltage regulator circuit comprises a voltage regulator chip (U1), a first common cathode diode (D2), a second common cathode diode (D3), wherein:
the first anode of the first common cathode diode (D2) is used for being electrically connected with the power transmission end of the internal battery, the second anode of the first common cathode diode (D2) is electrically connected with the power transmission end of the USB interface (J2) and the common cathode of the second common cathode diode (D3), the common cathode of the first common cathode diode (D2) is electrically connected with the power input end of the voltage stabilizing chip (U1), the first anode of the second common cathode diode (D3) is electrically connected with the driving output end of the key detection wake-up control circuit, the second anode of the second common cathode diode (D3) is electrically connected with the driving output end of the main control MCU, and the power output end of the voltage stabilizing chip (U1) is electrically connected with the power receiving end of the main control MCU.
5. The electronic table card management and control device control circuit of any of claims 2-4, wherein the power management circuit further comprises a charging circuit comprising a charging control chip (U2), wherein:
the power input end and the enabling end of the charging control chip (U2) are electrically connected with the power transmission end of the USB interface (J2), the power output end of the charging control chip (U2) is electrically connected with the power transmission end of the internal battery and the power input end of the power management circuit, and the battery temperature detection end and the charging current setting detection end of the charging control chip (U2) are electrically connected with the charging information output end of the internal battery.
6. The electronic table card management and control device control circuit of any of claims 2-4, wherein the power management circuit further comprises a dc EMC circuit and an isolated switching power supply buck module, wherein:
the power supply transmission end of the network transmission interface (J3) is electrically connected with the power supply input end of the direct-current EMC circuit, the power supply output end of the current EMC circuit is electrically connected with the power supply input end of the isolating switch power supply voltage reduction module, and the power supply output end of the isolating switch power supply voltage reduction module is electrically connected with the power supply receiving end of the main control MCU.
7. The electronic table card management apparatus control circuit of any of claims 1-4, further comprising a status indication circuit comprising a first light emitting diode (D4), wherein:
each state indicating end of the main control MCU is electrically connected with the anode of one of the first light emitting diodes (D4), and the cathode of each first light emitting diode (D4) is used for being grounded.
8. The electronic table card management and control device control circuit according to any one of claims 1-4, wherein the networking communication module comprises a networking communication chip (U3), wherein:
the internal communication end of the networking communication chip (U3) is electrically connected with the table board management and control end of the main control MCU, the power supply receiving end of the networking communication chip (U3) is electrically connected with the power supply output end of the power supply management circuit, and the external communication end of the networking communication chip (U3) is used for being in communication connection with one or more electronic table boards.
9. The electronic table card management and control device control circuit of claim 8, wherein the networking communication module further comprises a second light emitting diode (D5), wherein:
the state indicating end of the networking communication chip (U3) is electrically connected with the anode of the second light emitting diode (D5), and the cathode of the second light emitting diode (D5) is used for being grounded.
10. An electronic table card management and control device, characterized in that the electronic table card management and control device comprises an electronic table card management and control device control circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320254819.5U CN219392499U (en) | 2023-02-17 | 2023-02-17 | Electronic table card management and control equipment control circuit and electronic table card management and control equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320254819.5U CN219392499U (en) | 2023-02-17 | 2023-02-17 | Electronic table card management and control equipment control circuit and electronic table card management and control equipment |
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| CN219392499U true CN219392499U (en) | 2023-07-21 |
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| CN202320254819.5U Active CN219392499U (en) | 2023-02-17 | 2023-02-17 | Electronic table card management and control equipment control circuit and electronic table card management and control equipment |
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| CN (1) | CN219392499U (en) |
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