CN214277261U - Pressure acquisition device, pressure detection device and electronic pen - Google Patents
Pressure acquisition device, pressure detection device and electronic pen Download PDFInfo
- Publication number
- CN214277261U CN214277261U CN202120530289.3U CN202120530289U CN214277261U CN 214277261 U CN214277261 U CN 214277261U CN 202120530289 U CN202120530289 U CN 202120530289U CN 214277261 U CN214277261 U CN 214277261U
- Authority
- CN
- China
- Prior art keywords
- resistor
- pressure
- circuit
- voltage signal
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a pressure acquisition device, which comprises an acquisition circuit, a reference circuit, a differential circuit and an amplification circuit, wherein a pressure signal input end of the acquisition circuit is connected with a pressure signal output end of a pressure sensing chip, a voltage signal output end of the acquisition circuit is connected with a first voltage signal input end of the differential circuit, a voltage signal output end of the reference circuit is connected with a second voltage signal input end of the differential circuit, a voltage signal output end of the differential circuit is connected with a voltage signal input end of the amplification circuit, and a voltage signal output end of the amplification circuit outputs an amplified voltage signal. The invention can more accurately identify the slight pressure change.
Description
Technical Field
The application relates to the field of electronic equipment, in particular to a pressure acquisition device, a pressure detection device and an electronic pen.
Background
With the improvement of the technological level and the quality of life, more and more intelligent devices appear in the daily work and life of people, and the touch device is one of the intelligent devices. People can directly operate on the display screen through the touch equipment without a mouse or other equipment for wired or wireless operation, and the operation is convenient and fast. Meanwhile, electronic pens capable of writing on touch devices have also come to light. People can write on the touch equipment at will by using the electronic pen.
At present, in order to make the writing effect of the electronic pen more vivid, a pressure sensing module is usually added in the electronic pen. The force application state of the user when the electronic pen is used is collected through the pressure sensing module, so that the handwriting can change along with the change of force. And the pressure acquisition mode is also diversified, for example, capacitive pressure sensing, resistive pressure sensing and the like are adopted. However, most of the methods directly send the pressure information acquired by the pressure sensor chip to the single chip for processing, the accuracy of the pressure information acquired by the methods is low, and a user cannot sense the detail change of the pressure, so that the user experience is poor.
Disclosure of Invention
In order to solve one of the above technical problems, the present invention provides a pressure collecting device, a pressure detecting device and an electronic pen.
The first aspect of the embodiment of the invention provides a pressure acquisition device, which comprises an acquisition circuit, a reference circuit, a differential circuit and an amplification circuit, wherein a pressure signal input end of the acquisition circuit is connected with a pressure signal output end of a pressure sensing chip, a voltage signal output end of the acquisition circuit is connected with a first voltage signal input end of the differential circuit, a voltage signal output end of the reference circuit is connected with a second voltage signal input end of the differential circuit, a voltage signal output end of the differential circuit is connected with a voltage signal input end of the amplification circuit, and a voltage signal output end of the amplification circuit outputs an amplified voltage signal.
Preferably, the acquisition circuit includes a first resistor R1, a second resistor R2 and a first capacitor C1, two ends of the first resistor R1 are connected to the pressure signal input terminal of the acquisition circuit and the pressure signal output terminal of the pressure sensing chip M1, one end of the first resistor R1 is connected to the power supply, the other end of the first resistor R1 is connected to the first voltage signal input terminal of the differential circuit and the one end of the first capacitor C1, the one end of the second resistor R2 and the other end of the first capacitor C1 are connected to the other end of the second resistor R2 and grounded.
Preferably, the reference circuit comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3 and a first operational amplifier U1, one end of the third resistor R3 is connected with a power supply, the other end of the third resistor R3 is simultaneously connected with one end of the fourth resistor R4 and the non-inverting input end of the first operational amplifier U1, the other end of the fourth resistor R4 is grounded, the power supply end of the first operational amplifier U1 is simultaneously connected with one end of the second capacitor C2, one end of the third capacitor C3 and the power supply, the other end of the second capacitor C2 is connected to the other end of the third capacitor C3 and to ground, the ground terminal of the first operational amplifier U1 is grounded, and the output terminal of the first operational amplifier U1 is used as the voltage signal output terminal of the reference circuit and is connected to the inverting input terminal of the first operational amplifier U1 and the second voltage signal input terminal of the differential circuit.
Preferably, the differential circuit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a fourth capacitor C4, a fifth capacitor C5, a diode D1, and a second operational amplifier U2, one end of the fifth resistor R5 is connected to the pressure signal output terminal of the acquisition circuit as the first pressure signal input terminal of the differential circuit, the other end of the fifth resistor R5 is connected to the inverting input terminal of the second operational amplifier U2 and one end of the eighth resistor R8, one end of the sixth resistor R6 is connected to the voltage signal output terminal of the reference circuit as the second voltage signal input terminal of the differential circuit, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the positive phase input terminal of the second operational amplifier U2, and the output terminal of the second operational amplifier U2 is connected to the voltage signal input terminal of the differential circuit as the voltage signal output terminal of the differential circuit and the voltage signal input terminal of the eighth resistor R8 and the positive phase input terminal of the operational amplifier U2, and the output terminal of the differential circuit The power supply terminal of the second operational amplifier U2 is connected to the negative electrode of the diode D1, the one end of the fourth capacitor C4, the one end of the fifth capacitor C5 and the power supply at the same time, the positive electrode of the diode D1 is connected to the power supply, the other end of the fourth capacitor C4 is connected to the other end of the fifth capacitor C5 and grounded, and the ground terminal of the second operational amplifier U2 is grounded.
Preferably, the amplifying circuit includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6 and a third operational amplifier U3, a non-inverting input terminal of the third operational amplifier U3 is connected to the voltage signal output terminal of the differential circuit as a voltage signal input terminal of the amplifying circuit, an inverting input terminal of the third operational amplifier U3 is connected to one end of the ninth resistor R9 and one end of the tenth resistor R10 at the same time, the other end of the ninth resistor R9 is connected to the output terminal of the third operational amplifier U3 and one end of the twelfth resistor R12 at the same time, the other end of the twelfth resistor R12 is connected to one end of the thirteenth resistor R13 and one end of the sixth capacitor C6 at the same time as a voltage signal output terminal of the amplifying circuit and outputs an amplified voltage signal, the other end of the thirteenth resistor R13 is connected to the other end of the sixth capacitor C6 and grounded, the other end of the tenth resistor R10 is connected to one end of an eleventh resistor R11, and the other end of the eleventh resistor R11 is grounded.
A second aspect of the embodiments of the present invention provides a pressure detection apparatus, where the pressure detection apparatus includes a pressure sensing chip, a processor, and the pressure acquisition apparatus of the first aspect of the embodiments of the present invention, a pressure signal output end of the pressure sensing chip is connected to a pressure signal input end of the pressure acquisition apparatus, and a voltage signal output end of the pressure acquisition apparatus is connected to a voltage signal input end of the processor;
the pressure sensing chip is used for acquiring a pressure signal;
the pressure acquisition device is used for processing the pressure signal acquired by the pressure sensing chip to generate an amplified voltage signal;
and the processor is used for generating pressure information according to the amplified voltage signal generated by the pressure acquisition device.
A third aspect of the embodiments of the present invention provides an electronic pen, which includes a pen head, a pen body, and the pressure detection device according to the second aspect of the embodiments of the present invention, wherein the pen head is located at a front end of the pen body, and the pressure detection device is disposed in the pen body and is configured to detect a pressure generated when the pen head contacts an external object.
The invention has the following beneficial effects: the pressure signal output by the pressure sensing chip is acquired by the acquisition circuit, the voltage signal which can be linearly changed along with the pressure signal is output according to the pressure signal, and then the voltage signal is sent to the differential circuit to be used as one path of input signal of the differential circuit. The reference circuit may be configured to output a reference voltage as another input signal of the differential circuit. In the differential circuit, the difference between the voltage output by the acquisition circuit and the reference voltage is calculated to obtain a difference voltage. And finally, amplifying the difference voltage by N times through an amplifying circuit and outputting the amplified difference voltage to a processor for subsequent processing. Therefore, the voltage value received by the processor and the change amplitude of the voltage are larger, the processor can more accurately identify the slight pressure change, and further more levels of pressure detection are realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic view of a pressure acquisition device according to embodiment 1 of the present invention;
fig. 2 is a circuit diagram of a pressure acquisition apparatus according to embodiment 1 of the present invention;
fig. 3 is a circuit diagram of an acquisition circuit according to embodiment 1 of the present invention;
FIG. 4 is a circuit diagram of a reference circuit according to embodiment 1 of the present invention;
fig. 5 is a circuit diagram of a differential circuit according to embodiment 1 of the present invention;
fig. 6 is a circuit diagram of an amplifier circuit according to embodiment 1 of the present invention;
fig. 7 is a schematic view of a pressure detection device according to embodiment 2 of the present invention;
fig. 8 is a schematic diagram of an electronic pen according to embodiment 3 of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. Moreover, in order to provide a clearer description and easier understanding of the present application, the parts in the drawings are not drawn according to their relative dimensions, some dimensions have been exaggerated compared to other relevant dimensions; irrelevant details are not fully drawn for the sake of brevity.
Example 1
As shown in fig. 1 and fig. 2, the present embodiment provides a pressure collecting device, which includes a collecting circuit, a reference circuit, a differential circuit and an amplifying circuit, wherein a pressure signal input terminal of the collecting circuit is connected to a pressure signal output terminal of a pressure sensing chip, a voltage signal output terminal of the collecting circuit is connected to a first voltage signal input terminal of the differential circuit, a voltage signal output terminal of the reference circuit is connected to a second voltage signal input terminal of the differential circuit, a voltage signal output terminal of the differential circuit is connected to a voltage signal input terminal of the amplifying circuit, and a voltage signal output terminal of the amplifying circuit outputs an amplified voltage signal.
Specifically, in this embodiment, the pressure-sensitive chip may be a chip implemented by any principle, such as a capacitive pressure-sensitive chip and a resistive pressure-sensitive chip. The acquisition circuit acquires a pressure signal output by the pressure sensing chip, outputs a voltage signal which can be linearly changed along with the pressure signal according to the pressure signal, and then sends the voltage signal to the differential circuit to be used as one path of input signal of the differential circuit.
The reference circuit may be configured to output a reference voltage as another input signal of the differential circuit. In the differential circuit, the difference between the voltage output by the acquisition circuit and the reference voltage is calculated to obtain a difference voltage. And finally, amplifying the difference voltage by N times through an amplifying circuit and outputting the amplified difference voltage to a processor for subsequent processing. The processor can be an electronic device with a logic processing function, such as a singlechip, an FPGA and the like.
In the above process, when the pressure sensor chip detects that pressure is applied, the acquisition circuit outputs a voltage value corresponding to the current pressure, for example, 0.5V. Meanwhile, the reference circuit is configured to output a 0.6V voltage, and then the differential circuit performs differential calculation to output a 0.1V differential voltage. Assuming that the amplification factor of the amplification circuit is set to 10 times, the amplification circuit finally outputs an amplification voltage of 1V. When a larger force is continuously applied to the pressure-sensitive chip, the voltage value corresponding to the current pressure output by the acquisition circuit can be changed into 0.6V. Then the amplified voltage of 2V is output after being processed by the differential circuit and the amplifying circuit. Therefore, after the pressure acquisition device of the embodiment, the variation of the pressure value corresponding to the pressure acquired by the pressure sensor chip is amplified from 0.1V to 1V. Therefore, the voltage value received by the processor and the change amplitude of the voltage are larger, the processor can more accurately identify the slight pressure change, and further more levels of pressure detection are realized.
More specifically, as shown in fig. 3, the acquisition circuit includes a first resistor R1, a second resistor R2, and a first capacitor C1, two ends of the first resistor R1 are used as a pressure signal input end of the acquisition circuit and connected to a pressure signal output end of the pressure sensing chip M1, one end of the first resistor R1 is connected to a power supply, the other end of the first resistor R1 is used as a voltage signal output end of the acquisition circuit and simultaneously connected to one end of the first capacitor C1, one end of the second resistor R2, and a first voltage signal input end of the differential circuit, and the other end of the first capacitor C1 is connected to the other end of the second resistor R2 and grounded.
As shown in fig. 4, the reference circuit includes a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3, and a first operational amplifier U1, one end of the third resistor R3 is connected with a power supply, the other end of the third resistor R3 is simultaneously connected with one end of the fourth resistor R4 and the non-inverting input end of the first operational amplifier U1, the other end of the fourth resistor R4 is grounded, the power supply end of the first operational amplifier U1 is simultaneously connected with one end of the second capacitor C2, one end of the third capacitor C3 and the power supply, the other end of the second capacitor C2 is connected to the other end of the third capacitor C3 and to ground, the ground terminal of the first operational amplifier U1 is grounded, and the output terminal of the first operational amplifier U1 is used as the voltage signal output terminal of the reference circuit and is connected to the inverting input terminal of the first operational amplifier U1 and the second voltage signal input terminal of the differential circuit.
As shown in fig. 5, the differential circuit includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a fourth capacitor C4, a fifth capacitor C5, a diode D1, and a second operational amplifier U2, one end of the fifth resistor R5 is connected to the voltage signal output terminal of the acquisition circuit as the first voltage signal input terminal of the differential circuit, the other end of the fifth resistor R5 is connected to the inverting input terminal of the second operational amplifier U2 and one end of the eighth resistor R8, one end of the sixth resistor R6 is connected to the voltage signal output terminal of the reference circuit as the second voltage signal input terminal of the differential circuit, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the non-inverting input terminal of the second operational amplifier U2, and the output terminal of the second operational amplifier U2 is connected to the voltage signal input terminal of the differential circuit as the voltage signal output terminal of the differential circuit and the voltage signal input terminal of the eighth resistor R8 and the non-inverting input terminal of the second operational amplifier U2, and the output terminal of the differential amplifier U2 are connected to the voltage signal input terminal of the differential circuit as the voltage signal output terminal of the differential circuit The power supply terminal of the second operational amplifier U2 is connected to the negative electrode of the diode D1, the one end of the fourth capacitor C4, the one end of the fifth capacitor C5 and the power supply at the same time, the positive electrode of the diode D1 is connected to the power supply, the other end of the fourth capacitor C4 is connected to the other end of the fifth capacitor C5 and grounded, and the ground terminal of the second operational amplifier U2 is grounded.
As shown in fig. 6, the amplifying circuit includes a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6 and a third operational amplifier U3, a non-inverting input terminal of the third operational amplifier U3 is connected to the voltage signal output terminal of the differential circuit as a voltage signal input terminal of the amplifying circuit, an inverting input terminal of the third operational amplifier U3 is connected to one end of the ninth resistor R9 and one end of the tenth resistor R10 at the same time, the other end of the ninth resistor R9 is connected to the output terminal of the third operational amplifier U3 and one end of the twelfth resistor R12 at the same time, the other end of the twelfth resistor R12 is connected to one end of the thirteenth resistor R13 and one end of the sixth capacitor C6 as a voltage signal output terminal of the amplifying circuit at the same time and outputs an amplified voltage signal, the other end of the thirteenth resistor R13 is connected to the other end of the sixth capacitor C6 and grounded, the other end of the tenth resistor R10 is connected to one end of an eleventh resistor R11, and the other end of the eleventh resistor R11 is grounded.
Example 2
As shown in fig. 7, the present embodiment proposes a pressure detection apparatus, which includes a pressure sensing chip, a processor, and a pressure acquisition device. The pressure signal output end of the pressure sensing chip is connected with the pressure signal input end of the pressure acquisition device, and the voltage signal output end of the pressure acquisition device is connected with the voltage signal input end of the processor.
Specifically, the pressure sensing chip can acquire an externally transmitted pressure signal, and then the pressure signal is acquired by the pressure acquisition device and then is sent to the processor for subsequent processing. The specific circuit structure and the working principle of the pressure acquisition device can refer to the content recorded in embodiment 1, and are not described herein again. In this embodiment, the pressure acquisition device can convert the pressure signal acquired by the pressure sensing chip into a voltage signal and amplify the voltage signal. Therefore, the voltage value received by the processor and the change amplitude of the voltage are larger, the processor can more accurately identify the slight pressure change, and further more levels of pressure detection are realized.
Example 3
As shown in fig. 8, the present embodiment provides an electronic pen, which includes a pen head, a pen body, and a pressure detection device. The electronic pen can be operated on touch equipment and can also be remotely operated in a wireless mode. The pen point is positioned at the front end of the pen body, and the pressure detection device is arranged in the pen body and used for detecting pressure generated when the pen point is in contact with an external object. The pressure-sensitive chip can be arranged at a position close to the tail end of the pen point as much as possible, so that the pressure can be more easily and accurately transmitted to the pressure-sensitive chip.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (7)
1. The utility model provides a pressure acquisition device, its characterized in that, the device is including acquisition circuit, reference circuit, difference circuit and amplifier circuit, acquisition circuit's pressure signal input part is connected with the pressure signal output part of pressure sense chip, acquisition circuit's voltage signal output part with difference circuit's first voltage signal input part is connected, reference circuit's voltage signal output part with difference circuit's second voltage signal input part is connected, difference circuit's voltage signal output part with amplifier circuit's voltage signal input part is connected, amplifier circuit's voltage signal output part output voltage signal after the amplification.
2. The apparatus of claim 1, wherein the acquisition circuit comprises a first resistor R1, a second resistor R2 and a first capacitor C1, two ends of the first resistor R1 are connected to a pressure signal input end of the acquisition circuit and a pressure signal output end of the pressure sensing chip M1, one end of the first resistor R1 is connected to a power supply, the other end of the first resistor R1 is connected to one end of the first capacitor C1, one end of the second resistor R2 and a first voltage signal input end of the differential circuit as a voltage signal output end of the acquisition circuit, and the other end of the first capacitor C1 is connected to the other end of the second resistor R2 and grounded.
3. The apparatus of claim 1, wherein the reference circuit comprises a third resistor R3, a fourth resistor R4, a second capacitor C2, a third capacitor C3, and a first operational amplifier U1, one end of the third resistor R3 is connected with a power supply, the other end of the third resistor R3 is simultaneously connected with one end of the fourth resistor R4 and the non-inverting input end of the first operational amplifier U1, the other end of the fourth resistor R4 is grounded, the power supply end of the first operational amplifier U1 is simultaneously connected with one end of the second capacitor C2, one end of the third capacitor C3 and the power supply, the other end of the second capacitor C2 is connected to the other end of the third capacitor C3 and to ground, the ground terminal of the first operational amplifier U1 is grounded, and the output terminal of the first operational amplifier U1 is used as the voltage signal output terminal of the reference circuit and is connected to the inverting input terminal of the first operational amplifier U1 and the second voltage signal input terminal of the differential circuit.
4. The apparatus of claim 1, wherein the differential circuit comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a fourth capacitor C4, a fifth capacitor C5, a diode D1, and a second operational amplifier U2, one end of the fifth resistor R5 is connected to the pressure signal output terminal of the acquisition circuit as the first pressure signal input terminal of the differential circuit, the other end of the fifth resistor R5 is connected to the inverting input terminal of the second operational amplifier U2 and one end of the eighth resistor R8 as the second pressure signal input terminal of the differential circuit, one end of the sixth resistor R6 is connected to the voltage signal output terminal of the reference circuit as the second voltage signal input terminal of the differential circuit, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the non-inverting input terminal of the second operational amplifier U2, and the output terminal of the second operational amplifier U2 is connected to the voltage signal output terminal of the differential amplifier circuit as the non-inverting input terminal of the differential circuit The voltage signal input end of the large circuit is connected with the other end of the eighth resistor R8, the power supply end of the second operational amplifier U2 is connected with the negative electrode of the diode D1, one end of the fourth capacitor C4, one end of the fifth capacitor C5 and the power supply at the same time, the positive electrode of the diode D1 is connected with the power supply, the other end of the fourth capacitor C4 is connected with the other end of the fifth capacitor C5 and is grounded, and the grounded end of the second operational amplifier U2 is grounded.
5. The apparatus of claim 1, wherein the amplifying circuit comprises a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a sixth capacitor C6 and a third operational amplifier U3, wherein a non-inverting input terminal of the third operational amplifier U3 is connected to the voltage signal output terminal of the differential circuit as a voltage signal input terminal of the amplifying circuit, an inverting input terminal of the third operational amplifier U3 is connected to one terminal of the ninth resistor R9 and one terminal of the tenth resistor R10, the other terminal of the ninth resistor R9 is connected to the output terminal of the third operational amplifier U3 and one terminal of the twelfth resistor R12 simultaneously, the other terminal of the twelfth resistor R12 is connected to one terminal of the thirteenth resistor R13 and one terminal of the sixth capacitor C6 simultaneously as a voltage signal output terminal of the amplifying circuit and outputs an amplified voltage signal, the other end of the thirteenth resistor R13 is connected to the other end of the sixth capacitor C6 and grounded, the other end of the tenth resistor R10 is connected to one end of an eleventh resistor R11, and the other end of the eleventh resistor R11 is grounded.
6. A pressure detection device, characterized in that, the pressure detection device comprises a pressure sensing chip, a processor and the pressure acquisition device of any one of claims 1 to 5, the pressure signal output end of the pressure sensing chip is connected with the pressure signal input end of the pressure acquisition device, and the voltage signal output end of the pressure acquisition device is connected with the voltage signal input end of the processor;
the pressure sensing chip is used for acquiring a pressure signal;
the pressure acquisition device is used for processing the pressure signal acquired by the pressure sensing chip to generate an amplified voltage signal;
and the processor is used for generating pressure information according to the amplified voltage signal generated by the pressure acquisition device.
7. An electronic pen, comprising a pen head, a pen body and the pressure detection device of claim 6, wherein the pen head is located at the front end of the pen body, and the pressure detection device is disposed in the pen body and is used for detecting the pressure generated when the pen head contacts with an external object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120530289.3U CN214277261U (en) | 2021-03-15 | 2021-03-15 | Pressure acquisition device, pressure detection device and electronic pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120530289.3U CN214277261U (en) | 2021-03-15 | 2021-03-15 | Pressure acquisition device, pressure detection device and electronic pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214277261U true CN214277261U (en) | 2021-09-24 |
Family
ID=77793980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120530289.3U Active CN214277261U (en) | 2021-03-15 | 2021-03-15 | Pressure acquisition device, pressure detection device and electronic pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214277261U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115525176A (en) * | 2022-04-01 | 2022-12-27 | 荣耀终端有限公司 | Data transmission method, touch control pen and storage medium |
-
2021
- 2021-03-15 CN CN202120530289.3U patent/CN214277261U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115525176A (en) * | 2022-04-01 | 2022-12-27 | 荣耀终端有限公司 | Data transmission method, touch control pen and storage medium |
| CN115525176B (en) * | 2022-04-01 | 2023-07-25 | 荣耀终端有限公司 | Data transmission method, touch pen and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10216293B2 (en) | Active pen for a touch module, a touch input system and a driving method thereof | |
| US10949041B2 (en) | Capacitance detection circuit, capacitance detection method, touch detection apparatus, and terminal device | |
| CN101799734B (en) | Key detection method of capacitive touch screen | |
| CN101666830B (en) | Capacitance measurement circuit and electronic device applying same | |
| CN102681743B (en) | Micro impedance change detection device | |
| US9940501B2 (en) | Method and system for processing fingerprint sensing signals and fingerprint identification terminal | |
| CN103323153B (en) | A kind of piezoresistive pressure transmitter | |
| JP2019516141A (en) | Truth handwriting touch pen and touch device | |
| CN214277261U (en) | Pressure acquisition device, pressure detection device and electronic pen | |
| US9891724B2 (en) | Circuit and stylus for capacitive touchscreen | |
| TWI659349B (en) | A fingerprint sensing circuit and a fingerprint sensing apparatus are provided | |
| CN203323928U (en) | Piezoresistive pressure transmitter | |
| CN105653296B (en) | Electronic equipment wakes up system | |
| KR101210991B1 (en) | Touch-screen controller integrated circuit | |
| TWI479400B (en) | Sensing circuit relating to capacitive touch panel and mehod thereof using the same | |
| CN214373019U (en) | Pressure sensing device for electronic pen and electronic pen | |
| CN210038752U (en) | Infrared detection circuit, electronic pen position state detection device and writing equipment | |
| CN105528094A (en) | Active type touch pen | |
| CN214251326U (en) | Resistance bridge type pressure sensor signal processing circuit and active pen | |
| CN209513895U (en) | A kind of current sampling circuit for motor control | |
| CN207751970U (en) | A kind of miniature air mass sensor support circuit | |
| CN110308827B (en) | Infrared detection circuit, electronic pen position state detection device and writing equipment | |
| CN110456924A (en) | A kind of E-pen position condition detection method and device | |
| CN214096195U (en) | Novel detect electromagnetic flowmeter circuit | |
| CN211043525U (en) | Measuring instrument with phase sequence testing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |