CN217643325U - Touch switch circuit and active capacitance pen - Google Patents
Touch switch circuit and active capacitance pen Download PDFInfo
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- CN217643325U CN217643325U CN202123385711.XU CN202123385711U CN217643325U CN 217643325 U CN217643325 U CN 217643325U CN 202123385711 U CN202123385711 U CN 202123385711U CN 217643325 U CN217643325 U CN 217643325U
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Abstract
The utility model discloses a touch switch circuit and active electric capacity pen, the touch switch circuit includes: the touch circuit is provided with a power supply end and a signal output end, and the power supply end of the touch circuit is connected with the power supply input interface and used for triggering a power-on control signal or a power-off control signal; the switching circuit is provided with a signal input end, a battery power supply input end and a system power supply output end, the battery power supply input end is connected with the power supply input interface, and the system power supply output end is used for being connected with the main controller; the touch circuit comprises a touch circuit, a logic circuit and a switch circuit, wherein the touch circuit comprises a signal input end, a signal output end and a power supply end, the signal input end of the logic circuit is connected with the signal output end of the touch circuit, the signal output end of the logic circuit is connected with the signal input end of the switch circuit, and the power supply end of the logic circuit is connected with the power supply input interface. The utility model discloses can solve the not enough problem of available IO mouth of active electric capacity pen when increasing active electric capacity pen function.
Description
Technical Field
The utility model relates to an electric capacity pen technical field, in particular to touch switch circuit and active electric capacity pen.
Background
At present, capacitance pens are commonly used electronic equipment accessories. At present, an active capacitance pen which can be switched on and off by using finger touch, a capacitance pen which changes the line thickness along with pressure-sensitive stress and the like exist in the active capacitance pen, and the active capacitance pen provides convenience for life of people. Meanwhile, with the development of the active capacitive pen, people have more and more requirements on the functionality of the active capacitive pen, so that more and more functional modules need to be connected to the control chip of the active capacitive pen, the number of the remaining IO ports on the control chip gradually decreases, and if the control chip of the active capacitive pen is upgraded, the cost of the active capacitive pen is inevitably increased. Therefore, the shortage of available IO ports becomes an urgent problem to be solved when the active capacitance pen function is added.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a touch switch circuit aims at solving the not enough problem of available IO mouth when increasing active electric capacity pen function.
In order to achieve the above object, the utility model provides a touch switch circuit is applied to active electric capacity pen, active electric capacity pen includes main control unit, touch switch circuit includes:
the power supply input interface is used for inputting power supply voltage;
the touch circuit is provided with a power supply end and a signal output end, the power supply end of the touch circuit is connected with the power supply input interface, and the touch circuit is used for triggering a power-on control signal or a power-off control signal;
the switching circuit is provided with a signal input end, a battery power supply input end and a system power supply output end, the battery power supply input end is connected with the power supply input interface, and the system power supply output end is used for being connected with the main controller;
the touch circuit comprises a touch circuit, a logic circuit and a switch circuit, wherein the touch circuit comprises a signal input end, a signal output end and a power end;
the switch circuit is used for outputting the power supply input by the power supply input end to the main controller when the switch circuit is switched on, and cutting off the power supply output to the main controller when the switch circuit is switched off;
and the logic circuit is used for controlling the switching circuit to be switched on when receiving the starting control signal and controlling the switching circuit to be switched off when receiving the shutdown control signal.
Optionally, the touch circuit comprises a touch chip, a touch spring, and a first resistor; the touch chip is provided with a sensitivity pin, a grounding terminal, a touch signal pin, a signal output pin and a power supply pin;
the touch spring is connected with the first end of the first resistor, the second end of the first resistor is connected with the touch signal pin of the touch chip, the signal output pin of the touch chip is the signal output end of the touch circuit, the power supply pin of the touch chip is the power supply end of the touch circuit, and the grounding pin of the touch chip is grounded.
Optionally, the touch circuit further includes a first capacitor, a first end of the first capacitor is connected to the sensitivity pin of the touch chip, and a second end of the first capacitor is grounded.
Optionally, the touch circuit further includes a bidirectional electrostatic tube, a first end of the bidirectional electrostatic tube is connected to the second end of the first resistor and the touch signal pin of the touch chip, respectively, and a second end of the bidirectional electrostatic tube is grounded.
Optionally, the touch circuit further includes a second capacitor, a first end of the second capacitor is connected to the power pin of the touch chip, and a second end of the second capacitor is grounded.
Optionally, the switch circuit includes a MOS transistor, a second resistor, and a third resistor;
the source electrode of the MOS tube is the battery power supply input end of the switch circuit, the source electrode of the MOS tube is connected with the first end of the second resistor, the grid electrode of the MOS tube is connected with the second end of the second resistor and the first end of the third resistor, the second end of the third resistor is the signal input end of the switch circuit, and the drain electrode of the MOS tube is the system power supply output end of the switch circuit.
Optionally, the switch circuit further includes a third capacitor, a first end of the third capacitor is connected to the drain of the MOS transistor, a second end of the third capacitor is grounded, and the third capacitor is used for filtering sharp noise.
Optionally, the logic circuit includes a logic flip chip, and the logic flip chip has a signal input pin, an LED pin, a ground pin, and a power pin;
the signal input pin of the logic turning chip is the signal input end of the logic circuit, the LED pin of the logic turning chip is the signal output end of the logic circuit, the power pin of the logic turning chip is connected with a battery power supply, and the grounding pin of the logic turning chip is grounded.
Optionally, the logic circuit further includes a fourth capacitor and a fifth capacitor, a first end of the fourth capacitor is connected to the signal input pin of the logic flip chip, a first end of the fifth capacitor is connected to the power pin of the logic flip chip, and a second end of the fourth capacitor and a second end of the fifth capacitor are grounded.
The utility model also provides an active capacitance pen, which comprises a shell, a circuit board, a main controller, a system circuit and the touch switch circuit; the output end of the touch switch circuit is connected with the power input end of the main controller and the power input end of the system circuit respectively, the touch switch circuit, the system circuit and the main controller are arranged on the circuit board, and the circuit board is arranged in the shell.
The technical scheme of the utility model is through setting up touch circuit and logic circuit, when triggering the start touch signal, the touch circuit receives the start touch signal and then outputs the start control signal to the logic circuit, the logic circuit outputs the power signal to make the switch circuit conduct, the battery power input end of the switch circuit, and the system power output end of the switch circuit outputs to the main controller, makes the active capacitance pen power-on start; when a shutdown touch signal is triggered, the touch circuit outputs a shutdown control signal to the logic circuit after receiving the shutdown touch signal, the logic circuit outputs a shutdown signal to open the switch circuit, and the battery power input by the battery power input end of the switch circuit cannot be output to the main controller through the system power output end of the switch circuit due to the open circuit of the switch circuit, so that the active capacitance pen is powered down and shutdown; through setting up touch circuit and logic circuit, make touch circuit's signal output part need not connect main control unit's IO mouth makes touch circuit pass through logic circuit and directly is connected with switch circuit, switch circuit's system power output end direct with main control unit's power end is connected to reduce main control unit's IO mouth and taken up volume under the prerequisite that does not improve chip cost, realized making available IO mouth rich when increasing active electric capacity pen function, increased active electric capacity pen's practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a functional block diagram of a touch switch circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of a touch circuit according to an embodiment of the touch switch circuit of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the touch switch circuit of the present invention.
| Reference numerals | Name(s) | Reference numerals | Name (R) |
| 10 | Power input interface | U2 | |
| 20 | Touch circuit | TP1 | |
| 30 | Switching circuit | M1 | |
| 40 | Logic circuit | D1 | Bidirectional |
| 50 | Main controller | C1～C5 | First to fifth capacitors |
| U1 | Touch chip | R1～R3 | First to third resistors |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear \8230;) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship between the components in a specific posture (as shown in the attached drawings), the motion situation, etc., and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a touch switch circuit is applied to active electric capacity pen, active electric capacity pen includes main control unit 50.
Referring to fig. 1 to 3, in an embodiment, the touch switch circuit includes:
a power input interface 10 for inputting a power voltage;
the touch circuit 20, the touch circuit 20 has a power end and a signal output end, the power end of the touch circuit 20 is connected to the power input interface 10, and the touch circuit 20 is configured to trigger a power-on control signal or a power-off control signal;
the switching circuit 30 is provided with a signal input end, a battery power supply input end and a system power supply output end, wherein the battery power supply input end is connected with the power supply input interface 10, and the system power supply output end is used for being connected with the main controller 50;
a logic circuit 40, wherein the logic circuit 40 has a signal input end, a signal output end and a power end, the signal input end of the logic circuit 40 is connected with the signal output end of the touch circuit 20, the signal output end of the logic circuit 40 is connected with the signal input end of the switch circuit 30, and the power end of the logic circuit 40 is connected with the power input interface 10;
the switch circuit 30 is configured to output the power input by the power input terminal to the main controller 50 when the switch circuit is turned on, and cut off the power output to the main controller 50 when the switch circuit is turned off;
the logic circuit 40 is configured to control the switching circuit 30 to be turned on when receiving the power-on control signal, and control the switching circuit 30 to be turned off when receiving the power-off control signal.
In this embodiment, when a user uses the active capacitive pen, a touch area of a pen body of the active capacitive pen is touched by a finger of the user, where the touch area may be set at the pen body or the pen tail, if the active capacitive pen is in a power-off state, the touch circuit 20 receives a power-on touch signal, and outputs a power-on control signal to the logic circuit 40 from a signal output end of the touch circuit 20 according to the power-on touch signal, after receiving the power-on control signal, the logic circuit 40 outputs a power-on signal to the switch circuit 30 from a signal output end of the logic circuit 40 according to the power-on control signal, and after receiving the power-on signal, the switch circuit 30 is turned on, and the battery power is input to a battery power input end of the switch circuit 30 and output to the main controller 50 from a system power output end of the switch circuit 30, so that the active capacitive pen is powered on; if the active capacitive pen is in the power-on state, the touch circuit 20 receives a power-off touch signal, and outputs a power-off control signal to the logic circuit 40 through the signal output end of the touch circuit 20 according to the power-off touch signal, after the logic circuit 40 receives the power-off control signal, the logic circuit 40 outputs a power-off signal to the switch circuit 30 through the signal output end of the logic circuit 40 according to the power-off control signal, and after the switch circuit 30 receives the power-on signal, the switch circuit is turned off, and because the switch circuit 30 is turned off, the battery power input through the battery power input end of the switch circuit 30 cannot be output to the main controller 50 through the system power output end of the switch circuit 30, the active capacitive pen is powered off and powered off.
The utility model discloses a set up logic circuit 40, make touch circuit 20 directly be connected with switch circuit 30 through logic circuit 40, thereby realized touch circuit 20 need not with main control unit 50 lug connection of active electric capacity pen, the last lower electricity of main control unit 50 control active electric capacity pen is passed through to output touch signal, the IO mouth that main control unit 50 among the active electric capacity pen need not be taken up to the signal output part that makes touch circuit 20, the IO mouth occupation volume that has reduced main control unit 50 under the prerequisite that does not improve the chip cost has realized making available IO mouth rich when increasing active electric capacity pen function, the practicality of active electric capacity pen has been increased.
Referring to fig. 1 to 2, in an embodiment, the touch circuit 20 includes a touch chip U1, a touch spring TP1, and a first resistor R1; the touch chip U1 is provided with a sensitivity pin, a grounding end, a touch signal pin, a signal output pin and a power supply pin;
the second end of the touch spring TP1 is connected with the first end of the first resistor R1, the second end of the first resistor R1 is connected with the touch signal pin of the touch chip U1, the signal output pin of the touch chip U1 is the signal output end of the touch circuit 20, the power supply pin of the touch chip U1 is the power supply end of the touch circuit 20, and the grounding pin of the touch chip U1 is grounded.
In this embodiment, the touch circuit 20 further includes a second capacitor C2, a first end of the second capacitor C2 is connected to the power pin of the touch chip U1, a second end of the second capacitor C2 is grounded, and the second capacitor C2 is used for filtering sharp noise; the active capacitance pen is controlled to be started up by the low level of the signal output pin of the touch chip U1, so that the signal output pin of the touch chip U1 is normally set high when the active capacitance pen is not used; the touch spring TP1 is used for collecting a touch signal sent by a finger of a user, and the touch signal may be a single click, a double click, a long press or other touch modes.
Specifically, when a user starts up and uses the active capacitive pen, a touch area where a finger of the user touches a pen body of the active capacitive pen outputs a start-up touch signal, where the touch area may be disposed on the pen body or at a pen tail and connected to the touch spring TP 1. The touch spring TP1 receives a starting touch signal sent by a finger of a user, and a touch signal pin of the touch chip U1 outputs a starting control signal after receiving the starting touch signal, wherein the starting control signal is at a low level. When the active capacitive pen is turned off, the logic circuit 40 receives the low level and outputs a power-on control signal by level inversion, so that the switch circuit 30 is further controlled to power on the capacitive pen, and the capacitive pen is started successfully.
When the user needs to close at active capacitance pen, the touch area of the body of user's finger touch active capacitance pen outputs a shutdown touch signal, touch spring TP1 receives the shutdown touch signal that the user finger sent, and will the shutdown touch signal warp first resistance R1 outputs for touch chip U1, touch chip U1's touch signal foot receives output shutdown control signal behind the shutdown touch signal, wherein, shutdown control signal is the low level. When the active capacitive pen is powered on, the logic circuit 40 outputs a level inversion signal once when receiving a low level pulse, and when the active capacitive pen is powered on, the logic circuit 40 receives the low level and outputs a power-off control signal after outputting the level inversion signal, where the power-off control signal is used to control the logic circuit 40 to output a power-off signal, so as to further control the switch circuit 30 to power off the capacitive pen, and thus, the capacitive pen is successfully powered off. The utility model discloses a make touch circuit 20 directly be connected with switch circuit 30 through logic circuit 40, thereby realized touch circuit 20 do not need with main control unit 50 lug connection of active electric capacity pen, the last lower electricity of main control unit 50 control active electric capacity pen is passed through to the output touch signal, make touch circuit 20's signal output part need not occupy main control unit 50's IO mouth in the active electric capacity pen, the IO mouth occupation volume that has reduced main control unit 50 under the prerequisite that does not improve the chip cost has realized making available IO mouth rich when increasing active electric capacity pen function, the practicality of active electric capacity pen has been increased.
Referring to fig. 1 to 2, in an embodiment, the touch circuit 20 further includes a first capacitor C1, a first end of the first capacitor C1 is connected to a sensitivity pin of the touch chip U1, and a second end of the first capacitor C1 is grounded.
In this embodiment, when a user starts up and uses the active capacitance pen, a touch area where a finger of the user touches a pen body of the active capacitance pen triggers a start-up touch signal or a shutdown touch signal, the touch spring TP1 receives the start-up touch signal or the shutdown touch signal sent by the finger of the user, the touch signal pin of the touch chip U1 receives the start-up touch signal and then outputs a start-up control signal, and when the capacitance is larger, the sensitivity of the touch signal pin is larger, so that the sensitivity of the active capacitance pen for receiving the touch signal can be adjusted according to the user requirements, thereby increasing the practicability of the active capacitance pen.
Referring to fig. 1 to 2, in an embodiment, the touch circuit 20 further includes a bidirectional electrostatic tube D1, a first end of the bidirectional electrostatic tube D1 is respectively connected to a second end of the first resistor R1 and a touch signal pin of the touch chip U1, and a second end of the bidirectional electrostatic tube D1 is grounded.
In this embodiment, when a user uses the active capacitive pen, a finger of the user touches a touch area of a pen body of the active capacitive pen to output a power-on touch signal or a power-off touch signal, the touch spring TP1 receives the power-on touch signal or the power-off touch signal sent by the finger of the user, and static electricity carried by the power-on touch signal or the power-off touch signal is guided to the ground through the bidirectional electrostatic tube D1, so that the static electricity is released to the ground through a diode of the bidirectional electrostatic tube D1 when the static electricity is input from a physical interface, and the static electricity is stripped from the power-on touch signal or the power-off touch signal. Therefore, the logic circuit 40 can receive a more accurate power-on touch signal or power-off touch signal, and the practicability of the active capacitance pen is increased.
Referring to fig. 1 to 3, in an embodiment, the switch circuit 30 includes a MOS transistor M1, a second resistor R2, and a third resistor R3;
the source electrode of MOS pipe M1 does switch circuit 30's battery power input end, MOS pipe M1's source electrode with second resistance R2's first end is connected, MOS pipe M1's grid with second resistance R2's second end reaches third resistance R3's first end is connected, third resistance R3's second end does switch circuit 30's signal input part, MOS pipe M1's drain electrode does switch circuit 30's system power output end.
In this embodiment, the switch circuit 30 further includes a third capacitor C3, a first end of the third capacitor C3 is connected to the drain of the MOS transistor M1, a second end of the third capacitor C3 is grounded, and the third capacitor C3 is configured to filter sharp noise; and the MOS tube M1 is a PMOS tube M1.
Specifically, when a user starts up and uses the active capacitive pen, a touch area where a finger of the user touches a pen body of the active capacitive pen triggers a start-up touch signal, the touch circuit 20 receives the start-up touch signal sent by the finger of the user and outputs a low-level pulse, that is, a start-up control signal, to the logic circuit 40, and the logic circuit 40 outputs level inversion once when receiving a low-level pulse, and outputs level inversion to enable the logic circuit 40 to output an electrifying signal, where the electrifying signal is a low level. The switch circuit 30 is turned on by a MOS transistor M1, i.e. a PMOS transistor M1, and a voltage difference V between a drain and a source of the MOS transistor M1 DS Is negative, the voltage difference V between the source electrode and the grid electrode of the MOS tube M1 GS Is also negative, when the voltage difference V between the source electrode and the grid electrode of the MOS transistor M1 is GS And when the value is less than a certain value, the MOS tube M1 is conducted.
When the switch circuit 30 inputs a power-on signal, that is, the signal input terminal of the switch circuit 30 is connected to a low level, the MOS transistor M1 is turned on, the battery power supply inputs the switch circuit 30, the voltage of the battery power supply flows out from the system power supply output terminal of the switch circuit 30 through the MOS transistor M1 from the battery power supply input terminal of the switch circuit 30 to power on the active capacitance pen, and the active capacitance pen is successfully started after the system voltage is input from the power supply terminal of the main controller 50 of the active capacitance pen.
Further, when the user needs to shut down the active capacitive pen, a shutdown touch signal is output by a touch area where the user's finger touches the pen body of the active capacitive pen, the touch circuit 20 receives the shutdown touch signal sent by the user's finger, and outputs a low-level pulse, that is, a shutdown control signal, to the logic circuit 40, and when the logic circuit 40 receives a low-level pulse once, the output level is inverted, so that the logic circuit 40 outputs a power-down signal, where the power-down signal is a high level. Switch on of switch circuit 30 is by MOS pipe M1 PMOS pipe M1 control promptly, works as switch circuit 30 inputs down the signal of telecommunication, promptly when switch circuit 30's signal input termination is high level, MOS pipe M1 does not switch on, and battery power supply inputs behind the switch circuit 30, battery power supply's voltage can't be followed through MOS pipe M1 switch circuit 30's system power output end flows out, active capacitance pen's main control unit 50 loses the electricity, thereby makes active capacitance pen successfully closes.
The utility model discloses a make touch circuit 20 directly be connected with switch circuit 30 through logic circuit 40 to realized touch circuit 20 do not need with main control unit 50 lug connection of active electric capacity pen, directly control through switch circuit 30 main control unit 50's the power from top to bottom makes touch circuit 20's signal output part need not occupy main control unit 50's IO mouth in the active electric capacity pen, has reduced main control unit 50's IO mouth occupation volume under the prerequisite that does not improve the chip cost, has realized making available IO mouth rich when increasing active electric capacity pen function, has increased active electric capacity pen's practicality.
Referring to fig. 1 to 3, in an embodiment, the logic circuit 40 includes a logic flip chip U2, and the logic flip chip U2 has a signal input pin, an LED pin, a ground pin, and a power pin;
the signal input pin of the logic turning chip U2 is the signal input end of the logic circuit 40, the LED pin of the logic turning chip U2 is the signal output end of the logic circuit 40, the power pin of the logic turning chip U2 is connected with a battery power supply, and the grounding pin of the logic turning chip U2 is grounded.
In this embodiment, the logic flip chip U2 may also be a programmable control chip, and since the signal output pin of the touch chip U1 is normally set high, the LED pin of the logic flip chip U2 is normally set high, so that the active capacitive pen is in a shutdown state; logic circuit 40 still includes fourth electric capacity C4 and fifth electric capacity C5, the first end of fourth electric capacity C4 with logic upset chip U2's signal input foot is connected, the first end of fifth electric capacity C5 with logic upset chip U2's power foot is connected, the second end of fourth electric capacity C4 reaches fifth electric capacity C5's second end ground connection, fourth electric capacity C4 and fifth electric capacity C5 are used for filtering sharp clutter.
Specifically, when the user starts up the active capacitive pen, the finger of the user touches the touch area of the pen body of the active capacitive pen to output a start-up touch signal, and the touch circuit 20 receives the start-up touch signal sent by the finger of the user and outputs a low-level pulse, i.e., a start-up control signal to the logic circuit 40 according to the start-up touch signal. When the logic circuit 40 receives a low level pulse, the output level is inverted once, and when the signal input pin of the logic inversion chip U2 inputs a power-on control signal, the LED pin of the logic inversion chip U2 correspondingly outputs a power-on signal, i.e., a low level, which controls the switch circuit 30 to be turned on, so that the main controller 50 of the active capacitive pen is powered on, thereby starting the active capacitive pen.
When a user needs to close the active capacitive pen, a touch area where a finger of the user touches the pen body of the active capacitive pen outputs a power-on touch signal, the touch circuit 20 receives a power-off touch signal sent by the finger of the user, and outputs a low-level pulse, i.e., a power-off control signal to the logic control circuit according to the power-off touch signal. When the logic circuit 40 receives a low level pulse, the output level is inverted once, and when the signal input pin of the logic inversion chip U2 inputs a shutdown control signal, the LED pin of the logic inversion chip U2 correspondingly outputs a lower electrical signal, i.e., a high level, which controls the switch circuit 30 to open, so that the main controller 50 of the active capacitive stylus is powered off, thereby closing the active capacitive stylus.
The utility model discloses a logic circuit 40 is connected touch circuit 20 and switch circuit 30 to realized touch circuit 20 need not with main control unit 50 lug connection of active electric capacity pen, but directly through logic circuit 40 control switch circuit 30 right main control unit 50's power supply makes touch circuit 20's signal output part need not occupy main control unit 50's IO mouth in the active electric capacity pen, has reduced main control unit 50's IO mouth and has occupied the volume under the prerequisite that does not improve the chip cost, has realized making available IO mouth rich when increasing active electric capacity pen function, has increased active electric capacity pen's practicality.
The utility model also provides an active electric capacity pen, this active electric capacity pen include casing, circuit board, main control unit 50, system circuit and foretell touch switch circuit, and this touch switch circuit's concrete structure refers to above-mentioned embodiment, because this active electric capacity pen has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and here is no longer repeated.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent structure transformation of the content of the specification and the attached drawings, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A touch switch circuit applied to an active capacitive pen, the active capacitive pen comprising a main controller, the touch switch circuit comprising:
the power supply input interface is used for inputting power supply voltage;
the touch circuit is provided with a power supply end and a signal output end, the power supply end of the touch circuit is connected with the power supply input interface, and the touch circuit is used for triggering a power-on control signal or a power-off control signal;
the switching circuit is provided with a signal input end, a battery power supply input end and a system power supply output end, the battery power supply input end is connected with the power supply input interface, and the system power supply output end is used for being connected with the main controller;
the logic circuit is provided with a signal input end, a signal output end and a power supply end, the signal input end of the logic circuit is connected with the signal output end of the touch circuit, the signal output end of the logic circuit is connected with the signal input end of the switch circuit, and the power supply end of the logic circuit is connected with the power supply input interface;
the switch circuit is used for outputting the power supply input by the power supply input end to the main controller when the switch circuit is switched on, and cutting off the power supply output to the main controller when the switch circuit is switched off;
and the logic circuit is used for controlling the switching circuit to be switched on when receiving the starting control signal and controlling the switching circuit to be switched off when receiving the shutdown control signal.
2. The touch switch circuit of claim 1, wherein the touch circuit comprises a touch chip, a touch spring, and a first resistor; the touch chip is provided with a sensitivity pin, a grounding terminal, a touch signal pin, a signal output pin and a power supply pin;
the touch spring is connected with the first end of the first resistor, the second end of the first resistor is connected with the touch signal pin of the touch chip, the signal output pin of the touch chip is the signal output end of the touch circuit, the power supply pin of the touch chip is the power supply end of the touch circuit, and the grounding pin of the touch chip is grounded.
3. The touch switch circuit as recited in claim 2, wherein the touch circuit further comprises a first capacitor, a first terminal of the first capacitor is connected to the sensitivity pin of the touch chip, and a second terminal of the first capacitor is connected to ground.
4. The touch switch circuit as claimed in claim 2, wherein the touch circuit further comprises a bidirectional electrostatic tube, a first end of the bidirectional electrostatic tube is respectively connected to the second end of the first resistor and the touch signal pin of the touch chip, and a second end of the bidirectional electrostatic tube is grounded.
5. The touch switch circuit as recited in claim 2, wherein the touch circuit further comprises a second capacitor, a first terminal of the second capacitor being connected to the power pin of the touch chip, and a second terminal of the second capacitor being connected to ground.
6. The touch switch circuit of claim 1, wherein the switch circuit comprises a MOS transistor, a second resistor, and a third resistor;
the source electrode of the MOS tube is the battery power supply input end of the switch circuit, the source electrode of the MOS tube is connected with the first end of the second resistor, the grid electrode of the MOS tube is connected with the second end of the second resistor and the first end of the third resistor, the second end of the third resistor is the signal input end of the switch circuit, and the drain electrode of the MOS tube is the system power supply output end of the switch circuit.
7. The touch switch circuit as claimed in claim 6, wherein the switch circuit further comprises a third capacitor, a first terminal of the third capacitor is connected to the drain of the MOS transistor, and a second terminal of the third capacitor is grounded.
8. The touch switch circuit of claim 1, wherein the logic circuit comprises a logic flip chip having a signal input pin, an LED pin, a ground pin, and a power pin;
the signal input pin of the logic turning chip is the signal input end of the logic circuit, the LED pin of the logic turning chip is the signal output end of the logic circuit, the power pin of the logic turning chip is connected with a battery power supply, and the grounding pin of the logic turning chip is grounded.
9. The touch switch circuit of claim 8, wherein the logic circuit further comprises a fourth capacitor and a fifth capacitor, wherein a first terminal of the fourth capacitor is connected to the signal input pin of the logic flip chip, a first terminal of the fifth capacitor is connected to the power pin of the logic flip chip, and a second terminal of the fourth capacitor and a second terminal of the fifth capacitor are grounded.
10. An active capacitance pen, comprising a housing, a circuit board, a main controller, a system circuit and a touch switch circuit according to any one of claims 1 to 9; the output end of the touch switch circuit is connected with the power input end of the main controller and the power input end of the system circuit respectively, the touch switch circuit, the system circuit and the main controller are arranged on the circuit board, and the circuit board is arranged in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385711.XU CN217643325U (en) | 2021-12-29 | 2021-12-29 | Touch switch circuit and active capacitance pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123385711.XU CN217643325U (en) | 2021-12-29 | 2021-12-29 | Touch switch circuit and active capacitance pen |
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| Publication Number | Publication Date |
|---|---|
| CN217643325U true CN217643325U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123385711.XU Active CN217643325U (en) | 2021-12-29 | 2021-12-29 | Touch switch circuit and active capacitance pen |
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| CN (1) | CN217643325U (en) |
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