CN114063819A - Touch system gravity center signal processing circuit and electronic device comprising same - Google Patents
Touch system gravity center signal processing circuit and electronic device comprising same Download PDFInfo
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- CN114063819A CN114063819A CN202111350812.5A CN202111350812A CN114063819A CN 114063819 A CN114063819 A CN 114063819A CN 202111350812 A CN202111350812 A CN 202111350812A CN 114063819 A CN114063819 A CN 114063819A
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- 230000005484 gravity Effects 0.000 title claims abstract description 25
- 230000003321 amplification Effects 0.000 claims abstract description 46
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 46
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 49
- 238000004422 calculation algorithm Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention provides a touch system gravity center signal processing circuit and an electronic device, wherein the processing circuit comprises a signal acquisition unit, an operational amplification unit, a superposition amplification unit and a calculation unit which are sequentially connected. When a user touches a panel of the control system, the center point of the touch area and the signal value around the center point are acquired through the signal acquisition unit, the signal values around the center point and the center point are amplified through the operational amplification unit to obtain a center amplified signal value and a plurality of peripheral amplified signal values, the center amplified signal value and the plurality of peripheral amplified signal values are amplified in a superposition mode through the plurality of superposition amplification units to obtain a center point enhanced signal value, and finally the center point enhanced signal value is calculated through the calculation unit by using a calculation algorithm to obtain an accurate center point coordinate.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a touch system gravity center signal processing circuit and an electronic device comprising the same.
Background
Furthermore, a multi-channel sensor device, such as a touch sensor, an image sensor, or a multi-channel human-machine interface on a mobile device, is generally provided with a touch system to realize a touch control device, thereby improving the operation convenience of the user.
When the existing touch control system identifies a gravity center signal, a sensor senses a signal change value of a touch position, then a coordinate of a center point of the touch position is calculated according to the signal change value through an algorithm, and then a function of a corresponding position is realized according to the coordinate of the center point, so that a touch control function can be realized.
According to the gravity center signal processing mode of the control system, when the touch control force is weak, the signal change value is small, so that the coordinate of the central point cannot be accurately calculated by an algorithm, and the calculation error is large.
Disclosure of Invention
The invention aims to provide a touch system gravity center signal processing circuit and an electronic device comprising the same, so as to solve the problem that the calculation error of the center point coordinate of the existing touch system is large.
The invention provides a touch system gravity center signal processing circuit which comprises a signal acquisition unit, an operational amplification unit, a superposition amplification unit and a calculation unit which are sequentially connected, wherein the signal acquisition unit, the operational amplification unit, the superposition amplification unit and the calculation unit are sequentially connected
The signal acquisition unit is used for acquiring a central point of a touch area and signal values around the central point;
the operational amplification unit is used for amplifying the signal values of the central point and the periphery of the central point to obtain a central amplified signal value and a plurality of periphery amplified signal values;
the plurality of superposition amplifying units are used for superposing and amplifying the central amplifying signal value and the plurality of peripheral amplifying signal values to obtain a central point enhanced signal value;
and the computing unit is used for computing the central point enhanced signal value to obtain a central point coordinate.
When a user touches a panel of the control system, the center point of the touch area and the signal value around the center point are acquired through the signal acquisition unit, the signal values around the center point and the center point are amplified through the operational amplification unit to obtain a center amplified signal value and a plurality of peripheral amplified signal values, the center amplified signal value and the plurality of peripheral amplified signal values are amplified in a superposition mode through the plurality of superposition amplification units to obtain a center point enhanced signal value, and finally the center point enhanced signal value is calculated through the calculation unit by using a calculation algorithm to obtain an accurate center point coordinate.
Further, the signal acquisition unit includes a plurality of signal acquisition circuits.
Further, the signal acquisition circuit comprises a touch chip and a touch capacitor connected in series with the touch chip, wherein
The touch control capacitor is used for acquiring a central point of a touch control area and voltage change around the central point;
and the touch chip is used for obtaining the signal values of the central point and the periphery of the central point according to the voltage changes of the central point and the periphery of the central point.
Further, the operational amplification unit comprises a plurality of charge amplification circuits, and the charge amplification circuits are connected in series with the corresponding signal acquisition circuits.
Further, the charge amplification circuit includes an offset compensator and a feedback capacitance in series with the offset compensator.
Further, the superposition amplifying unit comprises three superposition circuits connected in parallel, and the superposition circuits comprise a first switch, a second switch, a first capacitor, a second capacitor, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and an eighth switch, wherein the superposition circuits comprise a first switch, a second switch, a first capacitor, a second capacitor, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch and an eighth switch
One end of the first switch is connected to the operational amplification unit and the second switch, the other end of the first switch is connected in series with one end of the third switch and one end of the first capacitor, the other end of the third switch is grounded, the other end of the first capacitor is connected with one end of a fifth switch and one end of a seventh switch, the other end of the fifth switch is grounded, and the other end of the seventh switch is connected with the seventh switch of the other superposition circuit;
one end of the second switch is connected to the operational amplification unit and connected with the first switch, the other end of the second switch is connected with a fourth switch and one end of a second capacitor, the other end of the fourth switch is grounded, the other end of the second capacitor is connected with a sixth switch and one end of an eighth switch, the other end of the sixth switch is grounded, and the other end of the eighth switch is connected with an eighth switch of the other superposition circuit;
the three superposed circuits in the superposed amplifying unit at the central position are respectively connected with the two superposed circuits in the adjacent superposed amplifying units, one end of the superposed amplifying unit at the central position is connected with the corresponding operational amplifying unit, and the other end of the superposed amplifying unit at the central position is connected with the computing unit.
Further, a holding unit is arranged between the calculating unit and the superposition amplifying unit.
Further, the holding unit includes:
the first amplifier comprises a first input end, a second input end, a first output end and a second output end, the first input end is connected to the other end of the corresponding seventh switch, the second input end is connected to the other end of the corresponding eighth switch, two ends of the first holding capacitor are respectively and electrically connected to the first input end and the first output end, and two ends of the second holding capacitor are respectively and electrically connected to the second input end and the second output end.
Further, the holding unit further includes a first reset switch and a second reset switch for controlling the first holding capacitor and the second holding capacitor to discharge respectively.
The invention also provides electronic equipment which comprises an equipment body and the touch system arranged in the equipment body, wherein the touch system comprises the touch system gravity center signal processing circuit.
Drawings
FIG. 1 is a block diagram of a gravity center signal processing circuit of a touch system according to a first embodiment of the present invention;
FIG. 2 is a circuit diagram of a gravity center signal processing circuit of a touch system according to a second embodiment of the present invention;
FIG. 3 is a circuit diagram of an operational amplifier unit in the gravity center signal processing circuit of the touch system shown in FIG. 2;
FIG. 4 is a circuit diagram of a superposition amplifying unit in the gravity center signal processing circuit of the touch system in FIG. 2
Fig. 5 is a circuit diagram of a holding unit in the gravity center signal processing circuit of the touch system in fig. 2.
Description of the main element symbols:
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10 | Second switch | 312 | A |
51 |
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11 | First capacitor | 313 | A |
511 |
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111 | |
314 | |
512 |
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112 | Third switch | 315 | A |
513 |
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20 | The |
316 | |
514 |
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21 | |
317 | |
52 |
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211 | |
318 | |
53 |
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212 | |
319 | |
54 |
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30 | |
320 | |
55 |
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31 | |
40 | ||
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311 | |
50 |
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a center-of-gravity signal processing circuit of a touch system according to a first embodiment of the present invention includes a signal acquisition unit 10, an operational amplification unit 20, a superposition amplification unit 30, and a calculation unit 40, which are connected in sequence, wherein the signal acquisition unit, the operational amplification unit 20, the superposition amplification unit 30, and the calculation unit 40 are connected in sequence
The signal acquisition unit 10 is used for acquiring a central point of a touch area and signal values around the central point;
an operational amplifier unit 20 for amplifying the signal values at the center point and the periphery of the center point to obtain a center amplified signal value and a plurality of periphery amplified signal values;
three superposition amplifying units 30 for superposing and amplifying the central amplified signal value and the plurality of peripheral amplified signal values to obtain a central point enhanced signal value;
and the calculating unit 40 is used for calculating the central point enhanced signal value to obtain a central point coordinate.
When a user touches a panel of the control system, the center-of-gravity signal processing circuit of the touch system acquires signal values of a center point and the periphery of the center point in a touch area through the signal acquisition unit 10, amplifies the signal values of the center point and the periphery of the center point through the operational amplification unit 20 to obtain a center amplified signal value and a plurality of periphery amplified signal values, superposes and amplifies the center amplified signal value and the plurality of periphery amplified signal values through the three superposition amplification units 30 to obtain a center enhanced signal value, and finally calculates the center enhanced signal value through the calculation unit 40 by using a calculation algorithm to obtain an accurate center point coordinate.
Referring to fig. 2 to 5, a center-of-gravity signal processing circuit of a touch system according to a second embodiment of the present invention is different from the first embodiment in that a signal acquisition unit 10 of the second embodiment includes three signal acquisition circuits 11. Each signal acquisition circuit 11 comprises a touch chip 111 and a touch capacitor 112 connected in series with the touch chip 111, wherein the touch capacitor 112 is used for acquiring a central point of a touch area and voltage changes around the central point; and the touch chip 111 is configured to obtain the signal values of the central point and the periphery of the central point according to the voltage changes of the central point and the periphery of the central point.
It can be understood that, in the embodiment of the present invention, the number of the signal acquisition circuits 11 is three, and in other embodiments of the present invention, the number of the signal acquisition circuits 11 may be three or more, and each signal acquisition circuit 11 corresponds to one touch point of the touch panel to acquire the voltage change of the touch area of the user.
Specifically, in this embodiment, the operational amplification unit 20 includes three charge amplification circuits 21, and the charge amplification circuits 21 are connected in series with the corresponding signal acquisition circuits 11. Specifically, the charge amplification circuit 21 includes an offset compensator 211 and a feedback capacitor 212 connected in series with the offset compensator 211, wherein the offset compensator 211 reduces an error of a signal value acquired by the signal acquisition circuit 11, and the feedback capacitor 212 amplifies the signal value acquired by the signal acquisition circuit 11.
It is understood that, in other embodiments of the present invention, the operational amplification unit 20 may further include more than three charge amplification circuits 21, specifically, the number of the charge amplification circuits 21 is the same as the number of the signal acquisition circuits 11, and the charge amplification circuits 21 are arranged in a one-to-one correspondence manner.
Specifically, in this embodiment, the superposition amplifying unit 30 includes three superposition circuits 31 connected in parallel, where the superposition circuits 31 include a first switch 311, a second switch 312, a first capacitor 313, a second capacitor 314, a third switch 315, a fourth switch 316, a fifth switch 317, a sixth switch 318, a seventh switch 319, and an eighth switch 320, where one end of the first switch 311 is connected to the operational amplifying unit 20 and the second switch 312, the other end of the first switch is connected in series to one ends of the third switch 315 and the first capacitor 313, the other end of the third switch 315 is connected to ground, the other end of the first capacitor 313 is connected to one ends of the fifth switch 317 and the seventh switch 319, the other end of the fifth switch 317 is connected to ground, and the other end of the seventh switch 319 is connected to the seventh switch 319 of another superposition circuit 31; the second switch 312 has one end connected to the operational amplifier 20 and the first switch 311, the other end connected to a fourth switch 316 and one end of a second capacitor 314, the other end of the fourth switch 316 is grounded, the other end of the second capacitor 314 is connected to one ends of a sixth switch 318 and an eighth switch 320, the other end of the sixth switch 318 is grounded, and the other end of the eighth switch 320 is connected to the eighth switch 320 of the other superimposing circuit 31; in this embodiment, three superimposing circuits 31 in the superimposing and amplifying unit 30 at the central position are respectively connected to two superimposing circuits 31 in the adjacent superimposing and amplifying unit 30, one end of the superimposing and amplifying unit 30 at the central position is connected to the corresponding operational amplifying unit 20, and the other end of the superimposing and amplifying unit 30 at the central position is connected to the calculating unit 40, so that the signal values collected by the signal collecting units 10 around the central position are collected to the superimposing and amplifying unit 30 at the middle position through the superimposing circuits 31, and then the signal value of the touch point at the central position is increased, so that the calculation result of the calculating unit 40 is more accurate.
Specifically, in the embodiment of the present invention, a holding unit 50 is disposed between the calculating unit 40 and the superposition amplifying unit 30 to hold the signal value superposed by the superposition amplifying unit 30, so as to improve the calculation accuracy of the calculating unit 40.
Specifically, in the embodiment of the present invention, the holding unit 50 includes a first amplifier 51, a first holding capacitor 52 and a second holding capacitor 53, the first amplifier 51 includes a first input terminal 511, a second input terminal 512, a first output terminal 513 and a second output terminal 514, the first input terminal 511 is connected to the other end of the corresponding seventh switch 319, the second input terminal 512 is connected to the other end of the corresponding eighth switch 320, two terminals of the first holding capacitor 52 are electrically connected to the first input terminal 511 and the first output terminal 513, two terminals of the second holding capacitor 53 are electrically connected to the second input terminal 512 and the second output terminal 514, respectively, so as to implement a voltage stabilizing function, and further hold the signal value superimposed by the superimposing amplification unit 30.
Specifically, in the present embodiment, the holding unit 50 further includes a first reset switch 54 and a second reset switch 55 for controlling the discharging of the first holding capacitor 52 and the second holding capacitor 53, respectively.
In an embodiment of the present invention, there is also provided an electronic device, including a device body (not shown) and a touch system (not shown) disposed in the device body, where the touch system includes a touch system gravity center signal processing circuit as described in any one of the above.
When a user touches a panel of the control system, the electronic device acquires signal values of a central point and the periphery of the central point of a touch area through the signal acquisition unit 10, amplifies the signal values of the central point and the periphery of the central point through the operational amplification unit 20 to obtain a central amplified signal value and a plurality of periphery amplified signal values, superposes and amplifies the central amplified signal value and the plurality of periphery amplified signal values through the plurality of superposition amplification units 30 to obtain a central point enhanced signal value, and calculates the central point enhanced signal value through the calculation unit 40 by using a calculation algorithm to obtain an accurate central point coordinate.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The gravity center signal processing circuit of the touch system is characterized by comprising a signal acquisition unit, an operational amplification unit, a superposition amplification unit and a calculation unit which are sequentially connected, wherein the signal acquisition unit, the operational amplification unit, the superposition amplification unit and the calculation unit are sequentially connected
The signal acquisition unit is used for acquiring a central point of a touch area and signal values around the central point;
the operational amplification unit is used for amplifying the signal values of the central point and the periphery of the central point to obtain a central amplified signal value and a plurality of periphery amplified signal values;
the plurality of superposition amplifying units are used for superposing and amplifying the central amplifying signal value and the plurality of peripheral amplifying signal values to obtain a central point enhanced signal value;
and the computing unit is used for computing the central point enhanced signal value to obtain a central point coordinate.
2. The touch system center of gravity signal processing circuit of claim 1, wherein the signal acquisition unit comprises a plurality of signal acquisition circuits.
3. The touch system center of gravity signal processing circuit of claim 2, wherein the signal acquisition circuit comprises a touch chip and a touch capacitor connected in series with the touch chip, wherein the touch capacitor is connected in series with the touch chip
The touch control capacitor is used for acquiring a central point of a touch control area and voltage change around the central point;
and the touch chip is used for obtaining the signal values of the central point and the periphery of the central point according to the voltage changes of the central point and the periphery of the central point.
4. The touch system center of gravity signal processing circuit of claim 1, wherein the operational amplifier unit comprises a plurality of charge amplifier circuits, and the charge amplifier circuits are connected in series with the corresponding signal acquisition circuits.
5. The touch-control system center of gravity signal processing circuit of claim 4, wherein the charge amplification circuit comprises an offset compensator and a feedback capacitor in series with the offset compensator.
6. The touch system gravity center signal processing circuit according to claim 1, wherein the superposition amplifying unit comprises three superposition circuits connected in parallel, and the superposition circuits comprise a first switch, a second switch, a first capacitor, a second capacitor, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, and an eighth switch, wherein
One end of the first switch is connected to the operational amplification unit and the second switch, the other end of the first switch is connected in series with one end of the third switch and one end of the first capacitor, the other end of the third switch is grounded, the other end of the first capacitor is connected with one end of a fifth switch and one end of a seventh switch, the other end of the fifth switch is grounded, and the other end of the seventh switch is connected with the seventh switch of the other superposition circuit;
one end of the second switch is connected to the operational amplification unit and connected with the first switch, the other end of the second switch is connected with a fourth switch and one end of a second capacitor, the other end of the fourth switch is grounded, the other end of the second capacitor is connected with a sixth switch and one end of an eighth switch, the other end of the sixth switch is grounded, and the other end of the eighth switch is connected with an eighth switch of the other superposition circuit;
the three superposed circuits in the superposed amplifying unit at the central position are respectively connected with the two superposed circuits in the adjacent superposed amplifying units, one end of the superposed amplifying unit at the central position is connected with the corresponding operational amplifying unit, and the other end of the superposed amplifying unit at the central position is connected with the computing unit.
7. The touch system center of gravity signal processing circuit of claim 1, wherein a holding unit is disposed between the computing unit and the superposition amplification unit.
8. The touch system center of gravity signal processing circuit of claim 1, wherein the holding unit comprises:
the first amplifier comprises a first input end, a second input end, a first output end and a second output end, the first input end is connected to the other end of the corresponding seventh switch, the second input end is connected to the other end of the corresponding eighth switch, two ends of the first holding capacitor are respectively and electrically connected to the first input end and the first output end, and two ends of the second holding capacitor are respectively and electrically connected to the second input end and the second output end.
9. The touch-control system gravity center signal processing circuit of claim 8, wherein the holding unit further comprises a first reset switch and a second reset switch for controlling the discharge of the first holding capacitor and the second holding capacitor, respectively.
10. An electronic device comprising a device body and a touch system provided in the device body, wherein the touch system comprises the touch system gravity center signal processing circuit according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111350812.5A CN114063819A (en) | 2021-11-15 | 2021-11-15 | Touch system gravity center signal processing circuit and electronic device comprising same |
| TW111101807A TWI819464B (en) | 2021-11-15 | 2022-01-17 | Touch system core signal processing circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111350812.5A CN114063819A (en) | 2021-11-15 | 2021-11-15 | Touch system gravity center signal processing circuit and electronic device comprising same |
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| CN114063819A true CN114063819A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111350812.5A Pending CN114063819A (en) | 2021-11-15 | 2021-11-15 | Touch system gravity center signal processing circuit and electronic device comprising same |
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| Country | Link |
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| CN (1) | CN114063819A (en) |
| TW (1) | TWI819464B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114063819A (en) * | 2021-11-15 | 2022-02-18 | 深圳天德钰科技股份有限公司 | Touch system gravity center signal processing circuit and electronic device comprising same |
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| GB201207712D0 (en) * | 2012-05-02 | 2012-06-13 | Binstead Ronald P | Touch sensor |
| US20130234988A1 (en) * | 2010-10-15 | 2013-09-12 | Murata Manufacturing Co., Ltd. | Touch-type inputting device and method for controlling the same |
| US20140347317A1 (en) * | 2013-05-27 | 2014-11-27 | Japan Display Inc. | Touch detection device, display device with touch detection function, and electronic apparatus |
| CN108572761A (en) * | 2017-03-09 | 2018-09-25 | 三星电子株式会社 | Touch screen controller, system and method |
| CN113064524A (en) * | 2021-04-13 | 2021-07-02 | 合肥松豪电子科技有限公司 | Touch detection system and method and display module |
| CN113507287A (en) * | 2021-06-18 | 2021-10-15 | 深圳天德钰科技股份有限公司 | Sample-and-hold circuit and electronic device with same |
| TW202223612A (en) * | 2021-11-15 | 2022-06-16 | 大陸商深圳天德鈺科技股份有限公司 | Touch system gravity center signal processing circuit and electronic device comprising same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112602046B (en) * | 2019-08-01 | 2022-06-07 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit, touch chip and electronic equipment |
| WO2021128209A1 (en) * | 2019-12-26 | 2021-07-01 | 深圳市汇顶科技股份有限公司 | Capacitance measurement circuit, touch-control chip and electronic device |
| CN111600590B (en) * | 2020-07-21 | 2020-11-03 | 深圳市汇顶科技股份有限公司 | Capacitance detection circuit and touch chip |
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2021
- 2021-11-15 CN CN202111350812.5A patent/CN114063819A/en active Pending
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- 2022-01-17 TW TW111101807A patent/TWI819464B/en active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130234988A1 (en) * | 2010-10-15 | 2013-09-12 | Murata Manufacturing Co., Ltd. | Touch-type inputting device and method for controlling the same |
| GB201207712D0 (en) * | 2012-05-02 | 2012-06-13 | Binstead Ronald P | Touch sensor |
| US20140347317A1 (en) * | 2013-05-27 | 2014-11-27 | Japan Display Inc. | Touch detection device, display device with touch detection function, and electronic apparatus |
| CN108572761A (en) * | 2017-03-09 | 2018-09-25 | 三星电子株式会社 | Touch screen controller, system and method |
| CN113064524A (en) * | 2021-04-13 | 2021-07-02 | 合肥松豪电子科技有限公司 | Touch detection system and method and display module |
| CN113507287A (en) * | 2021-06-18 | 2021-10-15 | 深圳天德钰科技股份有限公司 | Sample-and-hold circuit and electronic device with same |
| TW202223612A (en) * | 2021-11-15 | 2022-06-16 | 大陸商深圳天德鈺科技股份有限公司 | Touch system gravity center signal processing circuit and electronic device comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI819464B (en) | 2023-10-21 |
| TW202223612A (en) | 2022-06-16 |
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