阅读说明：本技术 一种价签供电电路及电子价签 (Price tag power supply circuit and electronic price tag ) 是由 蒋权 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种价签供电电路及电子价签。其中,该电路包括纽扣电池的电池连接器D4、磁簧开关SW1、NMOS管Q1,其中,所述电池连接器D4的1管脚连接所述纽扣电池的正极,所述电池连接器D4的2管脚连接所述纽扣电池的负极,所述纽扣电池的Vbat网络包括稳压滤波电容C11；所述Vbat网络连接至PMOS管VT2的源极,所述PMOS管VT2的控制极连接二极管VD1的负极,所述PMOS管VT2的漏极输出电源为VBAT-SEL,所述输出电源VBAT-SEL为电子价签的供电总电源。实现了对电子价签进行动态且灵活的功耗调整,可操作性更佳,较大地提升了电子价签的续航能力,同时,也保证了入网锁网的执行效率。(The invention discloses a price tag power supply circuit and an electronic price tag. The circuit comprises a button cell battery connector D4, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a pin 1 of the battery connector D4 is connected with the anode of the button cell battery, a pin 2 of the battery connector D4 is connected with the cathode of the button cell battery, and a Vbat network of the button cell battery comprises a voltage stabilizing filter capacitor C11; the Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of the electronic price tag. The dynamic and flexible power consumption adjustment of the electronic price tag is realized, the operability is better, the cruising ability of the electronic price tag is greatly improved, and meanwhile, the execution efficiency of network access and network locking is also ensured.)

1. A price tag power supply circuit, the circuit comprising: the button cell comprises a battery connector D4 of the button cell, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a pin 1 of the battery connector D4 is connected with the anode of the button cell, a pin 2 of the battery connector D4 is connected with the cathode of the button cell, and a Vbat network of the button cell comprises a voltage stabilizing filter capacitor C11;

the Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of an electronic price tag;

an output pin OUT of the reed switch SW1 is connected to the Vbat network through a pull-up resistor R2, and the yellow-female switch SW1 is connected with the anode of the diode VD 1;

the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL through a pull-up resistor R3, the source electrode of the NMOS transistor Q1 is connected to the ground GND, and the drain electrode of the NMOS transistor Q1 is connected to the control electrode of the PMOS transistor VT 2.

2. The price tag power supply circuit of claim 1, wherein the output power source VBAT _ SEL is in an inactive state when the battery connector D4 of the electronic price tag is attached to the button cell and no magnet is proximate to the reed switch SW 1.

3. The price tag supply circuit of claim 2, wherein when the output power source VBAT _ SEL is in an inactive state, the yolk switch SW1 is in an open state, and S1 of the yolk switch SW1 device is pulled high by the R2 resistor.

4. The price tag power supply circuit of claim 3, wherein when the S1 of the yellow-female switch SW1 device is at a high level, the diode VD1 is in a forward conducting state, the control voltage of the PMOS transistor VT2 is at a high level, and when the control voltage of the PMOS transistor VT2 is at a high level, the PMOS transistor VT2 is in a switch off state, the Vbat network of the button cell cannot be output to the output power Vbat _ SEL through the PMOS transistor VT2 to supply power to the total power supply of the electronic price tag, and at this time, the network of the output power Vbat _ SEL has no power supply, and the electronic price tag is in a zero power consumption state.

5. The price tag power supply circuit of claim 1, wherein when the electronic price tag is required to be used and there is a magnet in proximity to the reed switch SW1, the output power VBAT _ SEL is activated, the yolk switch SW1 is in a connected state, and the S1 signal of the yolk switch SW1 establishes a connection with the S2 signal.

6. The price tag power supply circuit of claim 5, wherein when the S1 signal and the S2 signal of the yolk switch SW1 are connected, S1 of the yolk switch SW1 device is pulled to a low level, and during the process, when the PMOS transistor VT2 reaches a conducting threshold value and starts to operate in a switch conducting state, the Vbat network is output to the output power supply Vbat _ SEL through the PMOS transistor VT2, the output power supply Vbat _ SEL supplies power to the main power supply of the electronic price tag, and the electronic price tag starts to operate after being powered on.

7. The price tag power supply circuit of claim 6, wherein the yolk switch SW1 is in an open state when the magnet near the reed switch SW1 is removed after the electronic price tag is activated.

8. The price tag power supply circuit of claim 7, wherein when the yellow switch SW1 is in an off state, a voltage is present on the output power VBAT _ SEL, the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL by a pull-up resistor and is at a high level, when the control electrode of the NMOS transistor Q1 is at a high level, the NMOS transistor Q1 operates in an on state, the drain of the NMOS transistor Q1 is at a low level, the control electrode of the PMOS transistor VT2 is still at a low level, the PMOS transistor VT2 still operates in a switch on state, the VBAT network still outputs to the output power VBAT _ SEL through the PMOS transistor VT2, the electronic price tag is powered by the output power VBAT _ SEL, and the electronic price tag remains in a powered on state.

9. The price tag power supply circuit of claim 8, wherein when the electronic price tag is in an activated state, if a magnet is close to the reed switch SW1, the yolk switch SW1 is in a conducting state, a signal of an S1 pin of the yolk switch changes from a high level to a low level, and the micro control unit MCU enters a debug mode.

10. An electronic price tag, characterized in that it comprises a price tag power supply circuit according to any of claims 1 to 9.

Technical Field

The invention relates to the field of mobile communication, in particular to a price tag power supply circuit, price tag power supply equipment and a computer readable storage medium.

Background

Electronic Shelf Label (ESL) has become a trend to replace the traditional paper price Label. The price tag is a standard in new retail industry, and electronic price tags are used by large-scale merchants. The use of the electronic price tags improves the working efficiency of stores, releases the hands of employees, and can save a great deal of manpower and time cost for merchants after long-term use.

The existing problem is that when the battery is installed on the electronic price tag but the electronic price tag is not used, the electronic price tag consumes power, and the longer the electronic price tag is stored, the more the power consumption is, which seriously affects the cruising ability of the electronic price tag after the electronic price tag enters the working state.

Disclosure of Invention

In order to solve the technical defects in the prior art, the invention provides a price tag power supply circuit, which comprises: the button cell comprises a battery connector D4 of the button cell, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a pin 1 of the battery connector D4 is connected with the anode of the button cell, a pin 2 of the battery connector D4 is connected with the cathode of the button cell, and a Vbat network of the button cell comprises a voltage stabilizing filter capacitor C11.

The Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of the electronic price tag.

An output pin OUT of the reed switch SW1 is connected to the Vbat network through a pull-up resistor R2, and the yellow-female switch SW1 is connected to the anode of the diode VD 1.

The control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL through a pull-up resistor R3, the source electrode of the NMOS transistor Q1 is connected to the ground GND, and the drain electrode of the NMOS transistor Q1 is connected to the control electrode of the PMOS transistor VT 2.

Optionally, when the battery connector D4 of the electronic price tag is attached to the button battery and no magnet is near the reed switch SW1, the output power VBAT _ SEL is in an inactive state.

Alternatively, when the output power VBAT _ SEL is in an inactive state, the yolk switch SW1 is in an open state, and S1 of the yolk switch SW1 device is pulled high by the R2 resistor.

Optionally, when the S1 of the yellow-female switch SW1 device is at a high level, the diode VD1 is in a forward conducting state, the control voltage of the PMOS transistor VT2 is at a high level, and when the control voltage of the PMOS transistor VT2 is at a high level, the PMOS transistor VT2 operates in a switch off state, the Vbat network of the button cell cannot be output to the output power Vbat _ SEL through the PMOS transistor VT2 to supply power to the main power supply of the electronic price tag, at this time, there is no power on the Vbat _ SEL network, and the electronic price tag is in a zero power consumption state.

Alternatively, when the electronic price tag is required to be used and there is a magnet close to the reed switch SW1, the output power VBAT _ SEL is activated, the yolk switch SW1 is in a connected state, and the S1 signal of the yolk switch SW1 is connected with the S2 signal.

Optionally, when the S1 signal of the yolk switch SW1 is connected to the S2 signal, S1 of the yolk switch SW1 is pulled to a low level, during this process, when the PMOS transistor VT2 reaches a conducting threshold to start to operate in a switch conducting state, the Vbat network is output to the output power Vbat _ SEL through the PMOS transistor VT2, the output power Vbat _ SEL supplies power to the main power supply of the electronic price tag, and the electronic price tag starts to operate after being powered on.

Alternatively, when the magnet close to the reed switch SW1 is off after the electronic price tag starts to work, the yellow-female switch SW1 is in an off state.

Optionally, when the yellow-female switch SW1 is in an off state, a voltage exists on the output power VBAT _ SEL, the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL by a pull-up resistor to be at a high level, when the control electrode of the NMOS transistor Q1 is at a high level, the NMOS transistor Q1 operates in an on state, the drain of the NMOS transistor Q1 is at a low level, the control electrode of the PMOS transistor VT2 is still at a low level, the PMOS transistor VT2 still operates in a switch-on state, the VBAT network still outputs to the output power VBAT _ SEL through the PMOS transistor VT2, the output power VBAT _ SEL supplies power to the total power supply of the electronic price tag, and the electronic price tag maintains the operating state after being powered on.

Optionally, after the electronic price tag is in the activated state, if a magnet is close to the reed switch SW1, the yolk switch SW1 is in the conducting state, a signal of the S1 pin of the yolk switch changes from high level to low level, and the MCU enters the debug mode.

The invention also provides an electronic price tag which comprises the price tag power supply circuit.

The price tag power supply circuit comprises a battery connector D4 of a button battery, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a 1 pin of the battery connector D4 is connected with the anode of the button battery, a 2 pin of the battery connector D4 is connected with the cathode of the button battery, and a Vbat network of the button battery comprises a voltage stabilizing filter capacitor C11; the Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of an electronic price tag; an output pin OUT of the reed switch SW1 is connected to the Vbat network through a pull-up resistor R2, and the yellow-female switch SW1 is connected with the anode of the diode VD 1; the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL through a pull-up resistor R3, the source electrode of the NMOS transistor Q1 is connected to the ground GND, and the drain electrode of the NMOS transistor Q1 is connected to the control electrode of the PMOS transistor VT 2. The dynamic and flexible power consumption adjustment of the electronic price tag is realized, the operability is better, the cruising ability of the electronic price tag is greatly improved, and meanwhile, the execution efficiency of subsequent network access and network locking is also ensured.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a circuit diagram of a first embodiment of a price tag power supply circuit of the present invention;

FIG. 2 is a circuit diagram of a second embodiment of the price tag power supply circuit of the present invention;

FIG. 3 is a circuit diagram of a third embodiment of the price tag power supply circuit of the present invention;

FIG. 4 is a circuit diagram of a fourth embodiment of the price tag power supply circuit of the present invention;

fig. 5 is a circuit diagram of a fifth embodiment of the price tag power supply circuit of the present invention.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.

Example one

Fig. 1 is a circuit diagram of a first embodiment of the price tag power supply circuit of the present invention. This embodiment proposes a price tag supply circuit, and this circuit includes: the button cell comprises a battery connector D4 of the button cell, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a pin 1 of the battery connector D4 is connected with the anode of the button cell, a pin 2 of the battery connector D4 is connected with the cathode of the button cell, and a Vbat network of the button cell comprises a voltage stabilizing filter capacitor C11.

The Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of the electronic price tag.

An output pin OUT of the reed switch SW1 is connected to the Vbat network through a pull-up resistor R2, and the yellow-female switch SW1 is connected to the anode of the diode VD 1.

The control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL through a pull-up resistor R3, the source electrode of the NMOS transistor Q1 is connected to the ground GND, and the drain electrode of the NMOS transistor Q1 is connected to the control electrode of the PMOS transistor VT 2.

Optionally, in this embodiment, the price tag power supply circuit is also applicable to power supply circuits in other Internet of things (IoT) devices.

Specifically, in this embodiment, after the electronic price tag is subjected to the production test, the battery is loaded and placed in the warehouse, the electronic price tag is in an inactive state, and the electronic price tag is in a zero power consumption state. When the electronic price tag needs to be delivered, the magnetic device is used for activating the electronic price tag to enable the electronic price tag to be in a normal working state, and after the electronic price tag is activated to be normally used, when the magnetic device is close to the electronic price tag, mechanisms such as a debugging function of the electronic price tag and a network searching are achieved. Therefore, the power consumption of the electronic price tags during the transportation process and when the electronic price tags are not used during storage is reduced, the cruising ability of the electronic price tags is delayed, and the fast network access and network locking efficiency of the electronic price tags is improved.

The price tag power supply circuit has the advantages that the price tag power supply circuit comprises a button battery connector D4, a magnetic reed switch SW1 and an NMOS (N-channel metal oxide semiconductor) tube Q1, wherein a pin 1 of the battery connector D4 is connected with the anode of the button battery, a pin 2 of the battery connector D4 is connected with the cathode of the button battery, and a Vbat network of the button battery comprises a voltage stabilizing filter capacitor C11; the Vbat network is connected to a source electrode of a PMOS tube VT2, a control electrode of the PMOS tube VT2 is connected with a negative electrode of a diode VD1, a drain electrode output power supply of the PMOS tube VT2 is VBAT _ SEL, and the output power supply VBAT _ SEL is a power supply main power supply of an electronic price tag; an output pin OUT of the reed switch SW1 is connected to the Vbat network through a pull-up resistor R2, and the yellow-female switch SW1 is connected with the anode of the diode VD 1; the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL through a pull-up resistor R3, the source electrode of the NMOS transistor Q1 is connected to the ground GND, and the drain electrode of the NMOS transistor Q1 is connected to the control electrode of the PMOS transistor VT 2. The dynamic and flexible power consumption adjustment of the electronic price tag is realized, the operability is better, the cruising ability of the electronic price tag is greatly improved, and meanwhile, the execution efficiency of subsequent network access and network locking is also ensured.

Example two

Fig. 2 is a circuit diagram of a second embodiment of the price tag power supply circuit according to the present invention, wherein, based on the above embodiment, when the battery connector D4 of the electronic price tag is connected to the button battery and no magnet is close to the reed switch SW1, the output power VBAT _ SEL is in an inactive state.

Alternatively, when the output power VBAT _ SEL is in an inactive state, the yolk switch SW1 is in an open state, and S1 of the yolk switch SW1 device is pulled high by the R2 resistor.

Optionally, when the S1 of the yellow-female switch SW1 device is at a high level, the diode VD1 is in a forward conducting state, the control voltage of the PMOS transistor VT2 is at a high level, and when the control voltage of the PMOS transistor VT2 is at a high level, the PMOS transistor VT2 operates in a switch off state, the Vbat network of the button cell cannot be output to the output power Vbat _ SEL through the PMOS transistor VT2 to supply power to the main power supply of the electronic price tag, at this time, there is no power on the Vbat _ SEL network, and the electronic price tag is in a zero power consumption state.

EXAMPLE III

Fig. 3 is a circuit diagram of a third embodiment of the price tag power supply circuit according to the present invention, based on the above embodiment, when the electronic price tag is needed and there is a magnet close to the reed switch SW1, the output power VBAT _ SEL is activated, the yellow switch SW1 is in a connected state, and the S1 signal of the yellow switch SW1 is connected to the S2 signal.

Optionally, when the S1 signal of the yolk switch SW1 is connected to the S2 signal, S1 of the yolk switch SW1 is pulled to a low level, during this process, when the PMOS transistor VT2 reaches a conducting threshold to start to operate in a switch conducting state, the Vbat network is output to the output power Vbat _ SEL through the PMOS transistor VT2, the output power Vbat _ SEL supplies power to the main power supply of the electronic price tag, and the electronic price tag starts to operate after being powered on.

Example four

Fig. 4 is a circuit diagram of a price tag power supply circuit according to a fourth embodiment of the present invention, and based on the above embodiment, alternatively, when the magnet close to the reed switch SW1 is separated after the electronic price tag starts to operate, the yellow-female switch SW1 is in an off state.

Optionally, when the yellow-female switch SW1 is in an off state, a voltage exists on the output power VBAT _ SEL, the control electrode of the NMOS transistor Q1 is connected to the output power VBAT _ SEL by a pull-up resistor to be at a high level, when the control electrode of the NMOS transistor Q1 is at a high level, the NMOS transistor Q1 operates in an on state, the drain of the NMOS transistor Q1 is at a low level, the control electrode of the PMOS transistor VT2 is still at a low level, the PMOS transistor VT2 still operates in a switch-on state, the VBAT network still outputs to the output power VBAT _ SEL through the PMOS transistor VT2, the output power VBAT _ SEL supplies power to the total power supply of the electronic price tag, and the electronic price tag maintains the operating state after being powered on.

EXAMPLE five

Based on the above embodiment, optionally, after the electronic price tag is in the activated state, if a magnet is close to the reed switch SW1, the yellow-female switch SW1 is in the conducting state, the signal of the S1 pin of the yellow-female switch changes from high level to low level, and the MCU enters the debug mode.

EXAMPLE six

Based on the above embodiments, the present invention further provides an electronic price tag, which includes the price tag power supply circuit as described in any one of the above.

It should be noted that the above-mentioned embodiment of the electronic price tag and the circuit embodiment belong to the same concept, and the specific implementation process thereof is detailed in the circuit embodiment, and the technical features in the circuit embodiment are applicable in the electronic price tag embodiment, which is not described herein again.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.