CN221303503U - Key detection circuit of remote controller - Google Patents
Key detection circuit of remote controller Download PDFInfo
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- CN221303503U CN221303503U CN202323037363.6U CN202323037363U CN221303503U CN 221303503 U CN221303503 U CN 221303503U CN 202323037363 U CN202323037363 U CN 202323037363U CN 221303503 U CN221303503 U CN 221303503U
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Abstract
The utility model provides a key detection circuit of a remote controller, which comprises: the power supply control unit, N remote control switches and a switch detection unit, wherein N is a positive integer; one end of the power supply control unit is connected with a power supply; one end of the switch detection unit is connected with the other end of the power supply control unit, the other end of the switch detection unit is connected with one end of each remote control switch, and the other end of each remote control switch is grounded, wherein the switch detection unit is used for receiving a trigger signal sent by the power supply control unit and judging the trigger state of the remote control switch according to the trigger signal; when the N remote control switches are in the lifting state, the power supply control unit is also used for controlling the power supply to stop supplying power. According to the key detection circuit of the remote controller, the triggering state of the remote control switch can be accurately detected, and the power consumption of the remote controller during standby can be greatly reduced.
Description
Technical Field
The utility model relates to the technical field of remote controllers, in particular to a key detection circuit of a remote controller.
Background
In the related art, the standby power consumption of the remote controller generally depends on the sleep standby power consumption of the internal chip itself and its peripheral circuits, and thus, the power consumption is large.
Disclosure of utility model
The utility model aims to solve the technical problems, and provides a key detection circuit of a remote controller, which not only can accurately detect the triggering state of a remote control switch, but also can greatly reduce the power consumption of the remote controller during standby.
The technical scheme adopted by the utility model is as follows:
A key detection circuit of a remote controller, comprising: the power supply control unit, N remote control switches and a switch detection unit, wherein N is a positive integer; one end of the power supply control unit is connected with a power supply; one end of the switch detection unit is connected with the other end of the power supply control unit, the other end of the switch detection unit is connected with one end of each remote control switch, and the other end of each remote control switch is grounded, wherein the switch detection unit is used for receiving a trigger signal sent by the power supply control unit and judging the trigger state of the remote control switch according to the trigger signal; when the N remote control switches are in the lifting state, the power supply control unit is also used for controlling the power supply to stop supplying power.
Specifically, the power supply control unit includes: the first pole of the first switching tube is connected with the power supply; and one end of the first resistor is connected with the second pole of the first switching tube, and the other end of the first resistor is connected with the third pole of the first switching tube.
Specifically, the first switching tube is a PMOS tube.
Specifically, the switch detection unit includes: the anodes of the N first diodes are connected with the other end of the first resistor, and the cathodes of the N first diodes are correspondingly connected with one end of the N remote control switches; the cathodes of the N second diodes are correspondingly connected with the cathodes of the N first diodes; and the first to N-th signal detection pins of the radio frequency chip are correspondingly connected with the anodes of the N second diodes.
Specifically, the key detection circuit of the remote controller further comprises a self-locking unit, a first end of the self-locking unit is connected with a third pole of the first switching tube, a second end of the self-locking unit is connected with an enabling signal output pin of the radio frequency chip, and a third end of the self-locking unit is grounded, wherein the self-locking unit is used for controlling the conduction state of the first switching tube according to an enabling signal output by the enabling signal output pin when the remote control switch is switched from a pressing state to a lifting state.
Specifically, the self-locking unit includes: one end of the second resistor is connected with the enabling signal output pin; the first pole of the second switching tube is connected with the third pole of the first switching tube, the second pole of the second switching tube is grounded, and the third pole of the second switching tube is connected with the other end of the second resistor.
Specifically, the second switching tube is a triode.
Specifically, the key detection circuit of the remote controller further comprises: the remote control switch comprises an indication unit, wherein one end of the indication unit is connected with a control signal output pin of the radio frequency chip, and the other end of the indication unit is grounded, and the indication unit is used for sending out an indication signal when the remote control switch is in a pressed state.
Specifically, the indication unit includes: one end of the third resistor is connected with the control signal output pin; the anode of the light-emitting diode is connected with the other end of the third resistor, and the cathode of the light-emitting diode is grounded.
The utility model has the beneficial effects that:
The utility model can accurately detect the triggering state of the remote control switch through the key detection circuit, and can greatly reduce the power consumption of the remote control during standby.
Drawings
Fig. 1 is a schematic diagram of a key detection circuit of a remote controller according to an embodiment of the present utility model;
Fig. 2 is a schematic structural diagram of a key detection circuit of a remote controller according to an embodiment of the present utility model;
Fig. 3 is a schematic structural diagram of a key detection circuit of a remote controller according to another embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but 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.
Fig. 1 is a schematic structural diagram of a key detection circuit of a remote controller according to an embodiment of the present utility model.
As shown in fig. 1, the key detection circuit of the remote controller according to the embodiment of the present utility model may include: the power control unit 100, N remote switches K y1~ KyN (only three remote switches K y1~ Ky3 are shown in fig. 1), and the switch detection unit 200, N being a positive integer.
Wherein one end of the power control unit 100 is connected to the power supply VCC; one end of the switch detection unit 200 is connected with the other end of the power supply control unit 100, the other end of the switch detection unit is connected with one end of each remote control switch K y1~ KyN, and the other end of each remote control switch K y1~ KyN is grounded, wherein the switch detection unit 200 is used for receiving a trigger signal sent by the power supply control unit 100 and judging the trigger state of the remote control switch K y1~ KyN according to the trigger signal; when the N remote switches K y1~ KyN are in the raised state, the power control unit 100 is further configured to control the power supply to stop supplying power.
Wherein, different remote control switches can correspond to different functions.
In one embodiment of the present utility model, as shown in fig. 1, the power control unit 100 may include: a first switching tube Q 1 and a first resistor R 1.
Wherein, the first pole of the first switch tube Q 1 is connected with the power supply VCC; one end of the first resistor R 1 is connected with the second pole of the first switching tube Q 1, and the other end of the first resistor R 1 is connected with the third pole of the first switching tube Q 1. The first switching tube Q 1 may be a PMOS tube.
In one embodiment of the present utility model, the switch detection unit 200 may include: n first diodes D 11~ D1N (only three first diodes D 11~ D13 are shown in the figure), N second diodes D 21~ D2N (only three second diodes D 21~ D23 are shown in the figure), and a radio frequency chip U 1.
The anodes of the N first diodes D 11~ D1N are connected with the other end of the first resistor R1, and the cathodes of the N first diodes D 11~ D1N are correspondingly connected with one end of the N remote control switches K y1~ KyN; the cathodes of the N second diodes D 21~ D2N are correspondingly connected with the cathodes of the N first diodes D 11~ D1N; the first to nth signal detection pins PB1 to PBN (only three signal detection pins PB1 to PB3 are shown in the figure) of the radio frequency chip U 1 are correspondingly connected to the anodes of the N second diodes D 21~ D2N.
Specifically, taking the first remote control switch K y1 as an example of key detection, when the remote control switch K y1 is not triggered, the first switching tube Q 1 is turned off, the power supply VCC stops supplying power, and at this time, the standby current of the remote controller is only the leakage current of the first switching tube Q 1. When the remote control switch K y1 is pressed, the first resistor R 1, the first diode D 11 and the remote control switch K y1 form a conducting loop, the power supply VCC starts to supply power, at this time, the first signal detection pin PB1 may detect a low level signal, that is, when the first signal detection pin PB1 detects a low level signal, the remote switch K y1 is considered to be in a pressed state, and at this time, the radio frequency chip U 1 starts to transmit radio frequency data. The key detection of the remaining remote switches is similar to that described above and will not be described in detail herein to avoid redundancy. Therefore, the key detection can be accurately and effectively performed, and when the remote controller is in a dormant state, the power supply VCC is cut off, the radio frequency chip U 1 and other components are in a non-power supply state, so that the power consumption of the remote controller is greatly reduced, in addition, the utility model can effectively prevent the first switch tube Q 1 from being turned off by arranging the second diode D 21~ D2N, The first resistor R 1, the first diode D 11~ D1N and the radio frequency chip U 1 form a conducting loop to generate electric leakage.
In one embodiment of the present utility model, as shown in fig. 2, the key detection circuit of the remote controller may further include a self-locking unit 300. The first end of the self-locking unit 300 is connected to the third pole of the first switch Q 1, the second end of the self-locking unit 300 is connected to the enable signal output pin PA1 of the radio frequency chip U 1, and the third end of the self-locking unit 300 is grounded, where the self-locking unit 300 is configured to control the on state of the first switch Q 1 according to the enable signal output pin PA1 when the remote switch K y1~ KyN is switched from the pressed state to the lifted state.
In one embodiment of the present utility model, as shown in fig. 2, the self-locking unit 300 may include: a second resistor R 2 and a second switching tube Q 2.
One end of the second resistor R 2 is connected with the enable signal output pin PA 1; the first pole of the second switching tube Q 2 is connected to the third pole of the first switching tube Q 1, the second pole of the second switching tube Q 2 is grounded, and the third pole of the second switching tube Q 2 is connected to the other end of the second resistor R 2. The second switching transistor Q 2 is a triode.
Specifically, taking the first remote control switch K y1 as an example, when the first remote control switch K y1 is in a pressed state and needs to be switched to a lifted state, the rf chip U 1 may send a high level signal to control the second switching tube Q 2 to be turned on through the enable signal output pin output PA1, at this time, the on state of the first switching tube Q 1 is no longer affected by the lifted state of the first remote control switch K y1, that is, even if the first remote control switch K y1 is in the lifted state, the first switching tube Q 1 is still in the on state, so as to form self-locking to the first switching tube Q 1 until the rf data transmission is completed, and the rf chip U 1 sends a low level signal to control the second switching tube Q 2 to be turned off through the enable signal output pin output PA1, at this time, the first switching tube Q 1 is turned off. Therefore, the integrity of radio frequency data sent by the remote controller can be ensured by arranging the self-locking unit, so that the reliability of remote control of the remote controller is greatly improved.
In one embodiment of the present utility model, as shown in fig. 3, the key detection circuit of the remote controller further includes: and an indication unit 400, wherein one end of the indication unit 400 is connected with the control signal output pin PA7 of the radio frequency chip U 1, and the other end of the indication unit 400 is grounded, and the indication unit 400 is used for sending out an indication signal when the remote control switch K y1~ KyN is in a pressed state.
In one embodiment of the present utility model, as shown in fig. 3, the indicating unit 400 may include: a third resistor R 3 and a light emitting diode D 3.
One end of the third resistor R 3 is connected with the control signal output pin PA 7; the positive electrode of the light emitting diode D 3 is connected to the other end of the third resistor R 3, and the negative electrode of the light emitting diode D 3 is grounded.
Specifically, when a certain remote control switch is in a pressed state, the control signal output pin PA7 may output a high level signal to control the light emitting diode D 3 to be turned on so as to send out a corresponding indication signal.
Of course, in other embodiments of the present utility model, the indication unit 400 may also include other structures, for example, a buzzer, which emits an audible indication signal when a certain remote control switch is in a pressed state.
It should be noted that, as shown in fig. 1 to 3, the key detection circuit of the remote controller may further include a peripheral circuit composed of a first capacitor C 1~C4, a fourth resistor R 4 and a crystal oscillator Z 1, where the peripheral circuit is respectively connected to corresponding pins of the radio frequency chip U 1.
In summary, the key detection circuit of the remote controller according to the embodiment of the utility model includes: the power supply control unit, N remote control switches and the switch detection unit are used for receiving the trigger signals sent by the power supply control unit and judging the trigger state of the remote control switches according to the trigger signals. Therefore, the key detection circuit not only can accurately detect the triggering state of the remote control switch, but also can greatly reduce the power consumption of the remote controller during standby.
In the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The meaning of "a plurality of" is two or more, unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; 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. 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.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.
Claims (9)
1. A key detection circuit of a remote controller, comprising: the power supply control unit, N remote control switches and a switch detection unit, wherein N is a positive integer; wherein,
One end of the power supply control unit is connected with a power supply;
one end of the switch detection unit is connected with the other end of the power supply control unit, the other end of the switch detection unit is connected with one end of each remote control switch, and the other end of each remote control switch is grounded, wherein the switch detection unit is used for receiving a trigger signal sent by the power supply control unit and judging the trigger state of the remote control switch according to the trigger signal; when the N remote control switches are in the lifting state, the power supply control unit is also used for controlling the power supply to stop supplying power.
2. The key detection circuit of a remote controller according to claim 1, wherein the power supply control unit includes:
The first pole of the first switching tube is connected with the power supply;
And one end of the first resistor is connected with the second pole of the first switching tube, and the other end of the first resistor is connected with the third pole of the first switching tube.
3. The key detection circuit of a remote controller according to claim 2, wherein,
The first switching tube is a PMOS tube.
4. The key detection circuit of a remote controller according to claim 2, wherein the switch detection unit includes:
The anodes of the N first diodes are connected with the other end of the first resistor, and the cathodes of the N first diodes are correspondingly connected with one end of the N remote control switches;
The cathodes of the N second diodes are correspondingly connected with the cathodes of the N first diodes;
And the first to N-th signal detection pins of the radio frequency chip are correspondingly connected with the anodes of the N second diodes.
5. The key detection circuit of a remote controller according to claim 4, further comprising a self-locking unit, wherein a first end of the self-locking unit is connected to a third pole of the first switching tube, a second end of the self-locking unit is connected to an enable signal output pin of the radio frequency chip, and a third end of the self-locking unit is grounded, and the self-locking unit is configured to control a conducting state of the first switching tube according to an enable signal output by the enable signal output pin when the remote switch is switched from a pressed state to a lifted state.
6. The key detection circuit of a remote controller according to claim 5, wherein the self-locking unit comprises:
One end of the second resistor is connected with the enabling signal output pin;
The first pole of the second switching tube is connected with the third pole of the first switching tube, the second pole of the second switching tube is grounded, and the third pole of the second switching tube is connected with the other end of the second resistor.
7. The key detection circuit of a remote controller according to claim 6, wherein,
The second switching tube is a triode.
8. The key detection circuit of a remote controller according to claim 4, further comprising:
the remote control switch comprises an indication unit, wherein one end of the indication unit is connected with a control signal output pin of the radio frequency chip, and the other end of the indication unit is grounded, and the indication unit is used for sending out an indication signal when the remote control switch is in a pressed state.
9. The key detection circuit of a remote controller according to claim 8, wherein the indication unit includes:
One end of the third resistor is connected with the control signal output pin;
the anode of the light-emitting diode is connected with the other end of the third resistor, and the cathode of the light-emitting diode is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323037363.6U CN221303503U (en) | 2023-11-10 | 2023-11-10 | Key detection circuit of remote controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323037363.6U CN221303503U (en) | 2023-11-10 | 2023-11-10 | Key detection circuit of remote controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221303503U true CN221303503U (en) | 2024-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323037363.6U Active CN221303503U (en) | 2023-11-10 | 2023-11-10 | Key detection circuit of remote controller |
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| Country | Link |
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| CN (1) | CN221303503U (en) |
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- 2023-11-10 CN CN202323037363.6U patent/CN221303503U/en active Active
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