CN112635242A - Electronic price tag power supply method and circuit and electronic price tag - Google Patents
Electronic price tag power supply method and circuit and electronic price tag Download PDFInfo
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- CN112635242A CN112635242A CN202011361630.3A CN202011361630A CN112635242A CN 112635242 A CN112635242 A CN 112635242A CN 202011361630 A CN202011361630 A CN 202011361630A CN 112635242 A CN112635242 A CN 112635242A
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- power supply
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- price tag
- electronic price
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
- H01H36/0006—Permanent magnet actuating reed switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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Abstract
The invention discloses an electronic price tag power supply method, a circuit and an electronic price tag, wherein the method detects an activation event through a sensing unit, switches to a first state when detecting the activation event, switches on a power supply circuit between a functional unit and a power supply unit of the electronic price tag to supply power to the functional unit in the first state according to the state of the sensing unit, and controls the power supply circuit between the functional unit and the power supply unit of the electronic price tag to be disconnected when the functional unit is not in the first state, so that the functional unit of the electronic price tag is not supplied with power under the condition of no activation, thereby achieving the effects of reducing or avoiding unnecessary power consumption of internal components in the process of non-use of the electronic price tag and ensuring the actual cruising ability of the electronic price tag The problem of reducing the endurance of the electronic price tag due to the consumption of electric energy in the process of long-term non-use of storage and the like.
Description
Technical Field
The invention relates to the technical field of electronic price tags, in particular to a power supply method and circuit for an electronic price tag and the electronic price tag.
Background
With the rapid development of the retail industry, in online retail sales, the traditional paper electronic price tags need to be frequently replaced, and a large amount of manpower and material resources are invested. Therefore, Electronic price tags, also called Electronic Shelf Labels (ESL), are becoming important applications in the retail industry.
The electronic price tag can be placed on a shelf, and information such as corresponding commodity price is acquired through a wired or wireless network to be displayed. However, in the prior art, no matter whether the electronic price tag is used or not, as long as the battery is arranged, the electric energy of the battery is gradually consumed, so that the electric energy of the electronic price tag is lost no matter the electronic price tag is not used for storage or transportation.
Disclosure of Invention
The invention aims to solve the technical problem that the actual cruising ability of an electronic price tag is influenced because the conventional electronic price tag consumes electric energy when not used, and provides a power supply method and circuit for the electronic price tag and the electronic price tag.
In order to solve the technical problem, the invention provides an electronic price tag power supply method, which comprises the following steps:
detecting an activation event through a sensing unit, wherein the sensing unit is switched to a first state when detecting the activation event;
when the induction unit is in a first state, a power supply circuit between the functional unit of the electronic price tag and the power supply unit is conducted to supply power to the functional unit;
and when the sensing unit is not in the first state, controlling a power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected.
Optionally, before the power supply line between the function unit for controlling the electronic price tag and the power supply unit is disconnected, the method further includes:
and detecting whether voltage exists between the functional unit of the electronic price tag and the power supply unit, if so, not controlling the power supply circuit between the functional unit of the electronic price tag and the power supply unit to be disconnected.
Optionally, the activation event includes at least one of:
the magnetic field strength is greater than a first switching threshold of the sensing unit;
the pressure is greater than a second switching threshold of the sensing unit;
the light intensity is greater than a third switching threshold of the sensing unit.
Further, the invention also provides an electronic price tag power supply circuit, which comprises an induction unit, a first power supply unit and a second power supply unit, wherein the induction unit is configured to detect an activation event and switch to a first state when the activation event is detected;
the switch unit is configured to detect the state of the induction unit, and when the induction unit is in the first state, a power supply line between the functional unit of the electronic price tag and the power supply unit is conducted; and when the induction is not in the first state, controlling a power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected.
Optionally, the method further includes:
and the activation maintaining unit is configured to detect whether the power supply unit supplies power to the functional unit, and when the power supply unit supplies power to the functional unit, the activation maintaining unit controls the switch unit to continuously conduct a power supply line between the functional unit of the electronic price tag and the power supply unit.
Optionally, the switch unit is a first switch tube, a control electrode of the first switch tube is connected to the sensing unit and the activation maintaining unit, and the other two electrodes of the first switch tube are respectively connected to the power supply unit and the functional unit of the electronic price tag;
when the sensing unit is in a first state, the switch unit is controlled to be conducted;
the activation maintaining unit detects whether a voltage exists between the power supply unit and the functional unit of the electronic price tag, and controls the switch unit to be turned on when the voltage exists between the power supply unit and the functional unit of the electronic price tag.
Optionally, the sensing unit includes a switch, the first state of the switch is closed, one end of the switch is grounded, the other end of the switch is connected to the control electrode of the first switch tube, and after the switch is closed, the level of the control electrode of the first switch tube is pulled down to enable the first switch tube to be conducted.
Optionally, the activation maintaining unit is a second switch tube, a control electrode of the second switch tube is connected between the power supply unit and the functional unit of the electronic price tag to detect whether a voltage exists between the power supply unit and the functional unit of the electronic price tag, the other two electrodes of the second switch tube are respectively connected to the control electrode of the first switch tube and the ground, the second switch tube is turned on when the control electrode of the second switch tube is at a high level, and the level of the control electrode of the first switch tube is pulled down to turn on the first switch tube.
Optionally, the sensing unit includes at least one of:
a magnetic control switch;
a voltage controlled switch;
and a light-operated switch.
Further, the invention also provides an electronic price tag, which realizes the electronic price tag power supply method and/or comprises the electronic price tag power supply circuit.
Advantageous effects
The invention provides a power supply method and a circuit of an electronic price tag and the electronic price tag, aiming at the defect that the endurance capacity is reduced due to the consumption of electric energy when the existing electronic price tag is not used, an activation event is detected through a sensing unit, the electronic price tag is switched to a first state when the activation event is detected, a power supply circuit between a functional unit of the electronic price tag and a power supply unit is conducted to supply power to the functional unit according to the state of the sensing unit when the activation event is detected, and when the activation event is not in the first state, the power supply circuit between the functional unit of the electronic price tag and the power supply unit is controlled to be disconnected, so that the functional unit of the electronic price tag is not supplied with power under the condition of no activation, the effect of reducing or avoiding unnecessary power consumption of internal components in the process of not using the electronic price tag is achieved, and the actual endurance capacity of the electronic.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a basic flowchart of an electronic price tag power supply method according to a first embodiment of the present invention;
fig. 2 is a flowchart of an electronic price tag power supply method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic price tag power supply circuit according to a third embodiment of the present invention;
fig. 4 is a circuit diagram of an electronic price tag power supply circuit according to a fourth embodiment of the 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.
First embodiment
In order to ensure the cruising ability of the electronic price tag, the present embodiment provides a power supply method for the electronic price tag,
fig. 1 is a basic flowchart of an electronic price tag power supply method provided in this embodiment, where the electronic price tag power supply method includes:
s101, detecting an activation event through a sensing unit, and switching the sensing unit to a first state when the sensing unit detects the activation event;
it should be noted that when the electronic price tag is not activated, then the electronic price tag functional unit is not powered. In this embodiment, the electronic price tag can be divided into an activated state and an inactivated state, wherein the functional unit of the electronic price tag in the inactivated state is not powered, and correspondingly, in the activated state, the functional unit of the electronic price tag is powered, and it can be understood that the functional unit is the unit that the electronic price tag completes the corresponding function in the normal operation.
It should also be noted that, when the electronic price tag is powered, it may or may not be in a normal operating state, for example, the functional unit of the electronic price tag may not be operated but still communicates with the power supply unit and can receive power supply from the power supply unit, and at this time, although the electronic price tag is not operated (may be considered to be in a sleep or standby state), some components in the functional unit still continuously consume electric energy, so that the actual cruising ability of the electronic price tag is affected.
In the embodiment, the functional unit is not powered when the electronic price tag is in an inactivated state, so that the power consumption of the electronic price tag during the non-operation can be completely or almost eliminated, and the actual cruising ability of the electronic price tag is ensured.
It is understood that the functional unit in this embodiment is not powered, and may be implemented by a device that implements a switching function, such as a switching tube.
When the electronic price tag needs to be used, the electronic price tag can be activated through an activation event. In this embodiment, the sensing unit detects the activation event, so it can be understood that the activation event can affect the sensing unit, and particularly in this embodiment, the sensing unit can be switched to the first state. The induction unit is arranged to detect the activation event, so that the electronic price tag can be activated when needed, and the electronic price tag can enter a working state.
S102, when the induction unit is in a first state, conducting a power supply line between the functional unit of the electronic price tag and the power supply unit to supply power to the functional unit;
the power supply unit refers to a unit which can provide electric energy by itself or can transmit external electric energy, and the power supply unit can be a built-in battery or a battery connector which can be connected with the battery, and the like. The functional unit should have an effective electrical connection to the power supply unit when it is required to operate.
And S103, when the sensing unit is not in the first state, disconnecting a power supply line between the functional unit of the electronic price tag and the power supply unit.
That is, in the case that the sensing unit does not detect an activation event, a power supply line between the functional unit of the electronic price tag and the power supply unit is disconnected, so that the functional unit of the electronic price tag is not powered, thereby reducing unnecessary power consumption of the electronic price tag due to standby of internal components in an unused state.
It should be noted that, in this embodiment, the disconnecting the power supply line between the functional unit of the electronic price tag and the power supply unit includes disconnecting the power supply line between all the functional units and the power supply unit, and further includes disconnecting some of the power supply lines when more than one power supply line is included between the functional unit and the power supply unit, for example, keeping the power supply of the functional unit for storage in which temporary information is stored, disconnecting the power supply line of the functional unit for display and communication, or selecting according to other actual requirements. In the above embodiment, even if the power supply line is only partially disconnected, since the amount of power supplied is reduced, the power consumed by the internal components of the electronic price tag can be reduced to some extent.
In some embodiments, before controlling the disconnection of the power supply line between the functional unit of the electronic price tag and the power supply unit, the method further comprises:
and S104, detecting whether voltage exists between the functional unit of the electronic price tag and the power supply unit, and if so, not controlling the power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected.
Since in practical applications the electronic price tag should be operated continuously during use, while some activation events are not continuous, the activation state of the electronic price tag should be controlled to be permanent in these cases, and not only during the triggering period of the activation event. Therefore, when the power supply unit is detected to supply power to the functional unit of the electronic price tag, namely the current electronic price tag can realize effective power supply, the power supply line is controlled to be kept on. That is, in these embodiments, the electronic price tag is caused to remain activated for a duration of operation even if the activation event disappears, as long as the sensing unit detects the activation event and the functional unit of the electronic price tag is powered.
It should be understood that in some embodiments, the activation event may be persistent, and in these embodiments, whether to implement step S104 may be arbitrarily selected.
In some embodiments, the activation event comprises at least one of:
the magnetic field intensity is larger than a first switching threshold value of the induction unit;
the pressure is greater than a second switching threshold of the sensing unit;
the light intensity is greater than the third switching threshold of the sensing unit.
It is understood that, according to the actual required activation events, the sensing units are corresponding components capable of sensing the activation events, such as a magnetic sensing element for sensing the intensity of the magnetic field, a pressure sensing element for sensing the pressure, and a photosensitive element for sensing the intensity of the light. It is understood that the sensing unit may include the above-described components or a combination thereof.
It should be noted that the switching thresholds are not limited to fixed values set in advance, and may be any values as long as the sensing units can be switched to the first state. As a specific example, the sensing unit is a reed switch, and the closing is defined as a first state of the reed switch, so that in the present example, as long as the reed switch realizes the closing of the switch under the action of the magnetic field, the magnetic field intensity at the time is greater than a first switching threshold value of the reed switch; for example, for a photosensitive device, such as a photo switch formed by a photo resistor, as long as the light intensity makes the photo switch conductive, it indicates that the light intensity is greater than the third switching threshold of the sensing unit.
It should be understood that the sensing unit should not be understood as a single component, but also includes a sensing module formed by its sensing capability (e.g., the photo-switch formed by the photo-resistor cooperating with other components as described above). In the present embodiment, the same terms are distinguished by "first" and "second", and do not indicate the order or quality.
According to the electronic price tag control method, the induction unit is used for detecting an activation event, the induction unit is switched to the first state when the activation event is detected, the power supply circuit between the functional unit of the electronic price tag and the power supply unit is conducted to supply power to the functional unit when the first state is detected, and the power supply circuit between the functional unit of the electronic price tag and the power supply unit is controlled to be disconnected when the induction unit is not in the first state, so that the functional unit of the electronic price tag is not supplied with power under the condition of no activation, unnecessary power consumption of internal components in the process that the electronic price tag is not used for a long time in transportation, storage and the like can be reduced or avoided, and the actual cruising ability of the electronic price tag is ensured.
Further, in some embodiments, when there is a voltage between the functional unit of the electronic price tag and the power supply unit, the power supply line between the functional unit of the electronic price tag and the power supply unit is not disconnected, so that even if the activation event disappears after the electronic price tag is activated, the activated state can be maintained to ensure normal operation.
Second embodiment
In this embodiment, a specific implementation manner is combined to further describe the electronic price tag power supply method, and fig. 2 is a flowchart of the electronic price tag power supply method according to a second embodiment of the present invention, where the electronic price tag power supply method includes:
s201, detecting the magnetic field intensity by a magnetic reed switch, and switching the magnetic reed switch to a closed state when detecting that the magnetic field intensity is larger than a first switching threshold value;
in practical application, the magnet can be close to the area where the magnetic reed switch is arranged on the electronic price tag, so that the magnetic reed switch is closed, and the effect of activating the electronic price tag is achieved. It is understood that the first switching threshold is determined based on parameters of the reed switch itself, and if the reed switch can be changed from an open state to a closed state, the magnetic field strength at this time is greater than the first switching threshold.
S202, when the reed switch is in a closed state, a power supply line between the functional unit of the electronic price tag and the power supply unit is conducted to supply power to the functional unit;
when the reed switch is closed, a power supply line between the functional unit of the electronic price tag and the power supply unit is conducted to supply power to the functional unit, namely, the electronic price tag is activated, and normal work can be carried out. In this embodiment, all the functional units of the electronic price tag are connected with the power supply unit through a power supply line, that is, in an inactivated state, all the functional units of the electronic price tag are not powered.
S203, detecting whether voltage exists between the functional unit of the electronic price tag and the power supply unit, if so, not controlling the power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected;
s204, when the reed switch is in a disconnected state and no voltage exists between the functional unit of the electronic price tag and the power supply unit, a power supply line between the functional unit of the electronic price tag and the power supply unit is disconnected;
after the electronic price tag is activated, a power supply line between the functional unit and the power supply unit is conducted, so that voltage exists between the functional unit and the power supply unit, and at the moment, the power supply line between the functional unit of the electronic price tag and the power supply unit is controlled to be continuously conducted. The electronic price tag continues to be operable, i.e., remains activated, even when the magnet is moved away from the reed switch.
It is understood that if the reed switch is not closed, no voltage will exist between the functional unit of the electronic price tag and the power supply unit. It can be seen that only after step S202, the functional unit of the electronic price tag may be powered and enter an active state.
It will be appreciated that in some embodiments, if the reed switch is open and there is no voltage on the supply line between the functional unit and the power supply unit, the electronic price tag may be caused to enter the inactive state again. If the electronic price tag is to be used again later, the magnet can be used to close the reed switch under the condition that the power supply unit supplies power for activation.
In the power supply method for the electronic price tag, the power supply line between the functional unit of the electronic price tag and the power supply unit is disconnected through the disconnection state of the magnetic reed switch when the electronic price tag is not activated, and the electronic price tag can be simply activated in a mode that the magnet is close to the magnetic reed switch to close the magnetic reed switch, so that the functional unit of the electronic price tag is powered and can start to work at any time. The power supply method for the electronic price tag is simple and reliable, and the actual cruising ability of the electronic price tag can be ensured by reducing or avoiding unnecessary power consumption of internal components when the electronic price tag is not used.
Third embodiment
The present embodiment provides an electronic price tag power supply circuit, as shown in fig. 3, which is a schematic structural diagram of the electronic price tag power supply circuit, the electronic price tag power supply circuit includes a sensing unit 11 and a switch unit 12, wherein the sensing unit 11 is configured to detect an activation event, and the sensing unit 11 is switched to a first state when detecting the activation event; the switch unit 12 is configured to detect a state of the sensing unit 11, and when the sensing unit 11 is in a first state, to turn on a power supply line between the functional unit of the electronic price tag and the power supply, and correspondingly, if the sensing unit 11 is not in the first state, to control the power supply line between the functional unit of the electronic price tag and the power supply to be turned off.
In some embodiments, the activation maintaining unit is further configured to detect whether a voltage exists between the functional unit of the electronic price tag and the power supply unit, and if so, the switch unit is not controlled to disconnect a power supply line between the functional unit of the electronic price tag and the power supply unit. In these embodiments, the electronic price tag is caused to remain activated for as long as the sensing element detects an activation event after which the functional element of the electronic price tag is powered, and continues to operate even if the activation event disappears.
It is understood that in the implementation process, if the activation event may be continuously present, the activation maintaining unit may not be provided, for example, the sensing unit is a magnetic switch, and a magnet may be provided in the corresponding area of the shelf, so that the activation state can be maintained as long as the electronic price tag is placed in the corresponding position on the shelf.
In some embodiments, the switch unit is a first switch tube, a control electrode of the first switch tube is connected with the induction unit and the activation maintaining unit, and the other two electrodes of the first switch tube are respectively connected with the power supply unit and the functional unit of the electronic price tag; when the sensing unit is in a first state, the switch unit is controlled to be conducted, and the activation maintaining unit controls the switch unit to maintain the conducted state when voltage exists between the power supply unit and the functional unit of the electronic price tag. In this embodiment, the first switching tube may be a PMOS (positive channel Metal Oxide Semiconductor) transistor.
It can be seen that the switch unit of the present embodiment can be controlled by both the sensing unit and the activation maintaining unit, and the switch unit is in a conducting state as long as at least one of the sensing unit and the activation maintaining unit controls the switch unit to be conducting. When the sensing unit enables the switch unit to be conducted, and further enables a power supply line between the power supply unit and the functional unit to be conducted and have voltage, even if the sensing unit is switched to other states due to disappearance of an activation event, the activation maintaining unit can also continuously control the switch unit to be conducted due to the voltage existing on the power supply line, so that the electronic price tag keeps an activated state and can work at any time.
In some embodiments, the sensing unit includes a switch, the first state of the switch is closed, one end of the switch is grounded, the other end of the switch is connected to the control electrode of the first switch tube, and after the switch is closed, the level of the control electrode of the first switch tube is pulled down to turn on the first switch tube. In some embodiments, the sensing unit may be embodied as at least one of a magnetically controlled switch, a voltage controlled switch, and a light controlled switch.
Accordingly, in response to the sensing element, the activation event may include at least one of:
the magnetic field intensity is greater than a first switching threshold value of the magnetic switch;
the pressure is greater than a second switching threshold of the pressure controlled switch;
the light intensity is greater than a third switching threshold of the photoswitch.
Upon detection of these activation events, the switch switches to a closed state.
It will be appreciated that the effective activation event will vary depending on the sensing element actually used.
In some embodiments, the activation maintaining unit is a second switching tube, a control electrode of the second switching tube is connected between the power supply unit and the functional unit of the electronic price tag to detect whether a voltage exists between the power supply unit and the functional unit of the electronic price tag, the other two electrodes of the second switching tube are respectively connected with the control electrode of the first switching tube and the ground, the second switching tube is conducted when the control electrode of the second switching tube is at a high level, and the first switching tube is conducted by pulling down the level of the control electrode of the first switching tube. In this embodiment, the second switch tube may be an NMOS (Negative channel Metal Oxide Semiconductor) transistor.
It should be understood that the electronic price tag power supply circuit in this embodiment may partially or completely implement the steps of the electronic price tag power supply method in the foregoing embodiments, but it should be understood that the steps of the electronic price tag power supply method in this embodiment of the present invention are not limited to be implemented by using the electronic price tag power supply circuit provided in this embodiment, and may also be implemented by other hardware or a combination of software and hardware.
The electronic price tag power supply circuit of the embodiment controls the conduction or disconnection of a power supply line between the functional unit of the electronic price tag and power supply (or controls the activation and deactivation of the electronic price tag) through the state of the sensing unit, so that whether the functional unit of the electronic price tag is powered or not is controlled. The functional unit of the electronic price tag is not powered under the condition of no activation, so that unnecessary power consumption of internal components in the process that the electronic price tag is not used for a long time in transportation, storage and the like can be reduced or avoided, the actual cruising ability of the electronic price tag is ensured, and normal working and use can be recovered after simple activation.
Fourth embodiment
To more clearly explain the electronic price tag power supply circuit of the present invention, the present embodiment further explains a specific circuit implementation of the electronic price tag power supply circuit, please refer to fig. 4, which is a circuit diagram of the electronic price tag power supply circuit provided in the present embodiment.
In practical application, the battery connector D4 may be any battery connector D4 including but not limited to a button battery connector D4, a five-size battery (AA battery) connector, a seven-size battery (AAA battery) connector, and the like. In other embodiments, the power supply unit may be a built-in electrical energy storage unit. The switch unit is a PMOS transistor 22, the sensing unit is a magnetic control switch, and is specifically a reed switch 21 in this example, one end of the reed switch 21 is directly connected to the control electrode of the PMOS transistor 22, and the other end is grounded, a first resistor R1 is connected in parallel between the control electrode (gate) and the source electrode of the PMOS transistor 22, and the ungrounded end of the reed switch 21 is further connected to a battery connector D4 through the first resistor R1, in this embodiment, the first resistor R1 also functions as a pull-up resistor for the reed switch 21. In other embodiments, the sensing unit may also be a device or module including, but not limited to, a voltage-controlled switch, a light-controlled switch, and the like. The source electrode of the PMOS tube 22 is connected with the battery connector D4, and the drain electrode is connected with the power supply main power supply of the electronic price tag, and the power supply main power supply is used for supplying power to the functional unit of the electronic price tag.
The electronic price tag power supply circuit further includes an activation maintaining unit, which is an NMOS transistor 23 in this embodiment, and a drain of the NMOS transistor 23 is directly connected to a control electrode of the PMOS transistor 22 to control the PMOS transistor 22. The source of the NMOS transistor 23 is grounded, and the control electrode is connected between the PMOS transistor 22 and the main power supply through a second resistor R2. In the present embodiment, the second pull-up resistor functions as a pull-up resistor for the NMOS transistor 23.
It can be understood that the output end of the battery connector D4 of the present embodiment is further provided with a voltage stabilizing filter capacitor C1, and in practical applications, various other components may be further provided as needed to achieve the required functions.
The electronic price tag power supply circuit will be described below with reference to the actual operating state.
After the battery connector D4 is connected to the battery, in the case that no magnet is close to the reed switch 21 to activate the electronic price tag, the reed switch 21 is in the off state, at this time, the end of the reed switch 21 connected to the control pole of the PMOS transistor 22 (the end S1 of the reed switch 21) is at the high level, and when the control pole of the PMOS transistor 22 is at the high level, the PMOS transistor 22 operates in the off state, that is, at this time, the PMOS transistor 22 is equivalent to an off switch, the battery cannot supply power to the total power supply of the price tag, and the functional units in the electronic price tag are in the inactive state of 0 power consumption.
When an electronic price tag is required, a magnet may be used in proximity to reed switch 21 to activate the electronic price tag. When the magnet is close to the area where the reed switch 21 is arranged on the electronic price tag, the reed switch 21 is closed and conducted, the reed switch 21 is grounded at the moment, and the control electrode of the PMOS tube 22 is pulled to be at a low level. When the control electrode of the PMOS transistor 22 is at a low level, the PMOS transistor 22 is turned on, and at this time, the power supply line between the functional unit of the electronic price tag and the power supply unit is turned on, the electric energy of the battery can be supplied to the functional unit through the total power supply of the price tag, and the electronic price tag is activated by electricity, and can start to work.
When the magnet is far away from the reed switch 21, the reed switch 21 is turned off, but at this time, because a voltage exists between the power supply unit and the functional unit of the electronic price tag, the control electrode of the NMOS transistor 23 is at a high level, the NMOS transistor 23 is turned on, and at this time, the drain electrode of the NMOS transistor 23 is at a low level, so that the control electrode of the PMOS transistor 22 is kept at a low level state, and the PMOS transistor 22 is still kept on. By detecting whether there is a voltage between the power supply unit and the functional unit of the electronic price tag through the NMOS transistor 23, the activated state of the electronic price tag is maintained, and the electronic price tag can still operate even if the magnet is away from the reed switch 21 in this embodiment (i.e., the activation event in this example disappears) so that the reed switch 21 is turned off (i.e., the sensing unit is not in the first state).
The electronic price tag power supply circuit controls the on-off of the battery connector and the power supply main power supply of the electronic price tag through the magnetic reed switch, and when the electronic price tag is not activated by using a magnet, the power supply main power supply of the electronic price tag does not supply power, so that the functional unit of the electronic price tag is not supplied with power, and unnecessary power consumption of internal components in the process that the electronic price tag is not used for a long time, such as transportation, storage and the like, is reduced or avoided. In the case of a battery, the electronic price tag can be activated for normal operation by simple activation of the magnet, and the activation of the electronic price tag is maintained through the NMOS transistor, so that the electronic price tag can maintain an activated state even if the magnet is removed.
The present embodiment further provides an electronic price tag, which implements the steps of the electronic price tag power supply method in the first embodiment and the second embodiment, and/or includes the electronic price tag power supply circuit in the third embodiment and the fourth embodiment. The electronic price tag can disconnect a power supply line between the functional unit and the power supply unit under the condition of nonuse, achieves the effects of reducing or avoiding unnecessary power consumption of internal components in the process of nonuse of the electronic price tag for a long time such as transportation, storage and the like, ensures the actual cruising ability of the electronic price tag, and can be normally used after being simply activated.
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.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
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.
Claims (10)
1. An electronic price tag power supply method, comprising:
detecting an activation event through a sensing unit, wherein the sensing unit is switched to a first state when detecting the activation event;
when the induction unit is in a first state, a power supply circuit between the functional unit of the electronic price tag and the power supply unit is conducted to supply power to the functional unit;
and when the sensing unit is not in the first state, controlling a power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected.
2. The method for supplying power to an electronic price tag according to claim 1, wherein before the step of controlling the power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected, the method further comprises:
and detecting whether voltage exists between the functional unit of the electronic price tag and the power supply unit, if so, not controlling the power supply circuit between the functional unit of the electronic price tag and the power supply unit to be disconnected.
3. The electronic price tag power supply method of claim 1, wherein the activation event comprises at least one of:
the magnetic field strength is greater than a first switching threshold of the sensing unit;
the pressure is greater than a second switching threshold of the sensing unit;
the light intensity is greater than a third switching threshold of the sensing unit.
4. An electronic price tag power supply circuit, comprising:
the sensing unit is configured to detect an activation event and switch to a first state when the activation event is detected;
the switch unit is configured to detect the state of the induction unit, and when the induction unit is in the first state, a power supply line between the functional unit of the electronic price tag and the power supply unit is conducted; and when the induction is not in the first state, controlling a power supply line between the functional unit of the electronic price tag and the power supply unit to be disconnected.
5. The electronic price tag power supply circuit of claim 4, further comprising:
and the activation maintaining unit is configured to detect whether the power supply unit supplies power to the functional unit, and when the power supply unit supplies power to the functional unit, the activation maintaining unit controls the switch unit to continuously conduct a power supply line between the functional unit of the electronic price tag and the power supply unit.
6. The electronic price tag power supply circuit of claim 4, wherein the switch unit is a first switch tube, a control electrode of the first switch tube is connected with the induction unit and the activation maintaining unit, and the other two electrodes of the first switch tube are respectively connected with the power supply unit and the functional unit of the electronic price tag;
when the sensing unit is in a first state, the switch unit is controlled to be conducted;
the activation maintaining unit detects whether a voltage exists between the power supply unit and the functional unit of the electronic price tag, and controls the switch unit to be turned on when the voltage exists between the power supply unit and the functional unit of the electronic price tag.
7. The electronic price tag power supply circuit of claim 6, wherein the sensing unit comprises a switch, the first state of the switch is closed, one end of the switch is grounded, the other end of the switch is connected with the control electrode of the first switch tube, and after the switch is closed, the level of the control electrode of the first switch tube is pulled down to conduct the first switch tube.
8. The electronic price tag power supply circuit of claim 7, wherein the activation maintaining unit is a second switch tube, a control electrode of the second switch tube is connected between the power supply unit and the functional unit of the electronic price tag to detect whether a voltage exists between the power supply unit and the functional unit of the electronic price tag, two other poles of the second switch tube are respectively connected to the control electrode of the first switch tube and ground, the control electrode of the second switch tube is turned on when the control electrode is at a high level, and the control electrode of the first switch tube is turned on when the control electrode is pulled down.
9. The electronic price tag power supply circuit of claim 7, wherein the sensing element comprises at least one of:
a magnetic control switch;
a voltage controlled switch;
and a light-operated switch.
10. An electronic price tag, characterized in that it implements the electronic price tag power supply method of any of claims 1-4 and/or comprises the electronic price tag power supply circuit of any of claims 5-9.
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| CN202011361630.3A CN112635242B (en) | 2020-11-27 | 2020-11-27 | Electronic price tag power supply method and circuit and electronic price tag |
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| CN202011361630.3A CN112635242B (en) | 2020-11-27 | 2020-11-27 | Electronic price tag power supply method and circuit and electronic price tag |
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| CN112635242A true CN112635242A (en) | 2021-04-09 |
| CN112635242B CN112635242B (en) | 2023-04-07 |
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| US6376932B1 (en) * | 2001-03-21 | 2002-04-23 | Tai-Her Yang | Solar cell-powered battery charging system in which battery output is controlled in response to charging current supplied by solar cell to battery |
| DE102011005414A1 (en) * | 2011-03-11 | 2012-09-13 | Robert Bosch Gmbh | Charging device with safety shutdown |
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| CN112635242B (en) | 2023-04-07 |
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