Touch sensor, display device, touch device, and touch system
By using a switching unit instead of external circuitry in the touch sensor, the structure is simplified, wiring difficulty and complexity of non-touch areas are reduced, and sensing accuracy and reliability are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-07-03
Smart Images
Figure CN224457369U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of sensor technology, and in particular to a touch sensor, display device, touch equipment, and touch system. Background Technology
[0002] A touch sensor is a sensor used to detect the contact or proximity of an object. It forms a sensing loop through touch electrodes in the touch area, control circuitry in the non-touch area, and external circuitry to detect the object's contact or proximity. However, touch sensors suffer from structural complexity due to the complexity of the external circuitry. Utility Model Content
[0003] To overcome the problems existing in related technologies, this disclosure provides a touch sensor, a display device, a touch equipment, and a touch system.
[0004] According to a first aspect of this disclosure, a touch sensor is provided, the touch sensor comprising:
[0005] Multiple touch electrodes, which are used to sense touch signals;
[0006] A control circuit, wherein the control circuit is electrically connected to the first end of each of the touch electrodes;
[0007] Multiple switching units, each of the switching units being electrically connected between the second ends of the two touch electrodes;
[0008] The conducting switch unit forms a sensing loop with the two electrically connected touch electrodes and the control circuit.
[0009] In some embodiments of this disclosure, the switching unit includes:
[0010] The transistor has its emitter and collector electrically connected to the second ends of two adjacent touch electrodes, and its base and collector electrically connected.
[0011] In some embodiments of this disclosure, the plurality of touch electrodes include a first electrode and a second electrode; the first electrode is electrically connected to the emitter of the transistor, and the second electrode is electrically connected to both the collector and the base of the transistor.
[0012] In some embodiments of this disclosure, the plurality of touch electrodes include:
[0013] Multiple driving electrodes are arranged at intervals along a first direction;
[0014] Multiple sensing electrodes are arranged at intervals along a second direction;
[0015] Wherein, the first direction and the second direction are perpendicular.
[0016] In some embodiments of this disclosure, the control circuit includes:
[0017] A sensing circuit is electrically connected to the first end of each of the touch electrodes. The sensing circuit is used to sense the change in self-capacitance of each of the touch electrodes and / or the change in mutual capacitance of different touch electrodes.
[0018] A driving circuit is provided, which is electrically connected to the first end of each of the touch electrodes, and is used to output a driving signal to each of the touch electrodes.
[0019] In some embodiments of this disclosure, the touch signal includes a first touch signal from the touch device and a second touch signal from the user; when all the switching units are turned on, the plurality of touch electrodes are used to sense the first touch signal; when all the switching units are turned off, the plurality of touch electrodes are used to sense the second touch signal.
[0020] In some embodiments of this disclosure, the control circuit includes:
[0021] A first control circuit, wherein the first control circuit is electrically connected to the first end of a portion of the touch electrodes;
[0022] The second control circuit is electrically connected to the first end of the other part of the touch electrode.
[0023] According to a second aspect of this disclosure, a display device is provided, the display device including a touch sensor and a display unit as described above; the display unit has a plurality of pixels, and the plurality of touch electrodes are disposed on the display unit.
[0024] According to a third aspect of this disclosure, a touch device is provided, the touch device comprising a touch sensor as described above or a display device as described above.
[0025] According to a fourth aspect of this disclosure, a touch system is provided, the touch device comprising the touch device as described above and the touch apparatus as described above.
[0026] In some embodiments of this disclosure, the touch electrode is used to provide a drive signal to the touch device and to sense a first touch signal of the touch device through the sensing circuit.
[0027] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:
[0028] A touch sensor includes multiple touch electrodes, a control circuit, and multiple switching units. The touch electrodes are electrically connected between the control circuit and the switching units. A conducting switching unit forms a sensing loop with two electrically connected touch electrodes and the control circuit. Due to the simple structure of the switching unit, the complexity of the touch sensor structure is reduced by replacing the external circuit with the switching unit to form the sensing loop.
[0029] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.
[0031] Figure 1 This is a schematic diagram of a touch sensor.
[0032] Figure 2 This is a schematic diagram of the structure of a touch sensor provided in an exemplary embodiment of the present disclosure;
[0033] Figure 3 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0034] Figure 4 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0035] Figure 5 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0036] Figure 6 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0037] Figure 7 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0038] Figure 8 This is a schematic diagram of the structure of a touch sensor provided in another exemplary embodiment of this disclosure;
[0039] Figure 9 This is a system block diagram of a touch device provided in an exemplary embodiment of the present disclosure.
[0040] In the picture:
[0041] 10-Touch electrode; 11-First electrode; 12-Second electrode; 13-Third electrode; 14-Fourth electrode; 15-Fifth electrode; 16-Sixth electrode; 20-Control circuit; 21-Sensing circuit; 22-Drive circuit; 23-First control circuit; 24-Second control circuit; 400-Touch device; 402-Processing component; 404-Memory; 406-Power supply component; 408-Multimedia component; 410-Audio component; 412-Input / output interface; 414-Sensor component; 416-Communication component ; 420 - Processor; T - Switching unit; T1 - Transistor; T2 - Triode; T21 - First transistor; T22 - Second transistor; T23 - Third transistor; T24 - Fourth transistor; L - Control line; VCL - Common voltage line; ECL - Electromagnetic control line; TE - Drive electrode; RE - Sensing electrode; C1 - First capacitor; C2 - Second capacitor; C3 - Third capacitor; C4 - Fourth capacitor; H1 - First sensing circuit; H2 - Second sensing circuit; H3 - Third sensing circuit; H4 - Fourth sensing circuit. Detailed Implementation
[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this invention as detailed in the appended claims. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0043] Touch sensors, also known as tactile sensors, are sensitive to touch or pressure and are used to sense the contact or proximity of objects. Touch sensors include capacitive touch sensors, resistive touch sensors, and electromagnetic touch sensors, among others.
[0044] In related technologies, a touch sensor is provided, such as Figure 1As shown, the touch sensor includes a touch area and a non-touch area. The touch area includes multiple touch electrodes 10, and the non-touch area includes a control circuit 20, an external circuit, and multiple control lines L. The external circuit includes multiple transistors T1, multiple electromagnetic control lines ECL, and multiple common voltage lines VCL. The multiple touch electrodes 10, the control circuit 20, and the external circuit can form a sensing loop to sense the contact or proximity of an object. The control circuit 20 is grounded through the control lines L, the touch electrodes 10, the transistors T1, and the common voltage line VCL to form a sensing loop, and is electrically connected to the control terminal of the transistors T1 through the electromagnetic control lines ECL. When the control circuit 20 turns on the transistors T1 through the electromagnetic control lines ECL, the touch sensor can sense the contact or proximity of an object through the sensing loop. However, because the external circuit includes multiple transistors T1, multiple electromagnetic control lines ECL, and multiple common voltage lines VCL, its complex structure leads to a complex structure for the touch sensor.
[0045] Based on this, this disclosure provides a touch sensor, which includes multiple touch electrodes, a control circuit, and multiple switching units. Because the switching units have a simple structure, replacing multiple transistors, multiple electromagnetic control lines, and multiple common voltage lines with multiple switching units reduces the complexity of the non-touch area and the wiring difficulty of the touch sensor, thereby reducing the overall structural complexity of the touch sensor. Furthermore, since multiple transistors, multiple electromagnetic control lines, and multiple common voltage lines are all located in the non-touch area of the touch sensor, replacing these elements with multiple switching units reduces the area of the non-touch area, thereby increasing the area of the touch area of the touch sensor.
[0046] An exemplary embodiment of this disclosure provides a touch sensor, such as Figure 2 As shown, the touch sensor includes multiple touch electrodes 10, a control circuit 20, and multiple switching units T. The touch electrodes 10 are used to sense touch signals. The control circuit 20 is electrically connected to the first terminal of each touch electrode 10. Each switching unit T is electrically connected between the second terminals of two touch electrodes 10. A sensing loop is formed between the conducting switching unit T, the two electrically connected touch electrodes 10, and the control circuit 20.
[0047] In this embodiment, the touch sensor includes multiple touch electrodes, a control circuit, and multiple switching units. The multiple touch electrodes are electrically connected between the control circuit and the multiple switching units. A sensing loop is formed between a conducting switching unit, two electrically connected touch electrodes, and the control circuit. Because the switching unit has a simple structure, replacing the external circuit with a switching unit to form the sensing loop reduces the complexity of the touch sensor structure.
[0048] For example, the control circuit 20 is electrically connected to the first end of each touch electrode 10 via a control line L.
[0049] In one embodiment, the switching unit T includes a transistor. The emitter and collector of the transistor are electrically connected to the second terminals of two adjacent touch electrodes 10, respectively, and the base and collector of the transistor are electrically connected.
[0050] In this embodiment, due to the simple structure of the transistor, the complexity of the touch sensor is reduced by setting the switching unit as a transistor. Moreover, by electrically connecting the base and collector of the transistor, the control circuit only needs to be connected to the collector and emitter of the transistor to control the switching on and off of the transistor, which reduces the difficulty of the control circuit controlling the switching on and off of the transistor.
[0051] For example, the transistor can be an NPN transistor or a PNP transistor.
[0052] For example, the switching unit T may include not only transistors, but also unidirectional conducting units such as diodes, which is not limited here.
[0053] In one embodiment, such as Figure 3 As shown, the plurality of touch electrodes 10 include a first electrode 11 and a second electrode 12. The first electrode 11 is electrically connected to the emitter of the transistor T2. The second electrode 12 is electrically connected to both the collector and the base of the transistor T2.
[0054] In this embodiment, the transistor conducts when the voltage between its base and emitter exceeds a threshold, and turns off when the voltage between them falls below a threshold. By electrically connecting the transistor's base and emitter to different touch electrodes and controlling the transistor's on / off state by outputting different level signals to the different touch electrodes through a control circuit, the complexity of touch sensor control is reduced.
[0055] For example, two transistors T2 are disposed between three adjacent touch electrodes 10. The middle touch electrode 10 is electrically connected to the base and collector of the two transistors T2, respectively, and the touch electrodes 10 on both sides are electrically connected to the emitter of the two transistors T2, respectively.
[0056] For example, such as Figure 4As shown, the multiple touch electrodes 10 also include a third electrode 13, a fourth electrode 14, a fifth electrode 15, and a sixth electrode 16. Transistor T2 includes a first transistor T21, a second transistor T22, a third transistor T23, and a fourth transistor T24. The emitter of the first transistor T21 is electrically connected to the first electrode 11, and the base and collector of the first transistor T21 are electrically connected to the second electrode 12. The base and collector of the second transistor T22 are electrically connected to the second electrode 12, and the emitter of the second transistor T22 is electrically connected to the third electrode 13. The emitter of the third transistor T23 is electrically connected to the fourth electrode 14, and the base and collector of the third transistor T23 are electrically connected to the fifth electrode 15. The base and collector of the fourth transistor T24 are electrically connected to the fifth electrode 15, and the emitter of the fourth transistor T24 is electrically connected to the sixth electrode 16.
[0057] For example, when the first transistor T21, the second transistor T22, the third transistor T23, and the fourth transistor T24 are turned on, the control circuit 20, the second electrode 12, the first transistor T21, and the first electrode 11 form a first sensing circuit H1. The control circuit 20, the second electrode 12, the second transistor T22, and the third electrode 13 form a second sensing circuit H2. The control circuit 20, the fifth electrode 15, the third transistor T23, and the fourth electrode 14 form a third sensing circuit H3. The control circuit 20, the fifth electrode 15, the fourth transistor T24, and the sixth electrode 16 form a fourth sensing circuit H4.
[0058] For example, when the control circuit 20 outputs a low-level signal to the first electrode 11 and a high-level signal to the second electrode 12, the transistor T2 is turned on. When the control circuit 20 outputs a high-level signal to both the first electrode 11 and the second electrode 12, the transistor T2 is turned off. When the control circuit 20 outputs a low-level signal to the second electrode 12, the transistor T2 is turned off.
[0059] For example, when the switching unit T is a diode, two diodes are provided on the three adjacent touch electrodes 10, the middle touch electrode 10 is electrically connected to the anodes of the two diodes respectively, and the touch electrodes 10 on both sides are electrically connected to the cathodes of the two diodes respectively.
[0060] In one embodiment, such as Figure 5 As shown, the plurality of touch electrodes 10 include a plurality of driving electrodes TE and a plurality of sensing electrodes RE. The plurality of driving electrodes TE are arranged at intervals along a first direction. The plurality of sensing electrodes RE are arranged at intervals along a second direction. The first direction and the second direction are perpendicular.
[0061] In this embodiment, when the switching unit is turned on, multiple driving electrodes can serve as paths for multiple sensing loops in the first direction, and multiple sensing electrodes can serve as paths for multiple sensing loops in the second direction. Since the first and second directions are perpendicular, the control circuit can determine the position where the object contacts or approaches in the first and second directions respectively, thereby improving the accuracy of the touch sensor sensing.
[0062] For example, the first direction can be horizontal, and the second direction can be vertical.
[0063] For example, a predetermined capacitance is formed at the intersection between the driving electrode TE and the sensing electrode RE. For example, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, etc.
[0064] For example, such as Figure 4 As shown, when the control circuit 20 determines that the position of the object contacting or approaching in the first direction is on the first sensing loop H1, and the control circuit 20 determines that the position of the object contacting or approaching in the second direction is on the third sensing loop H3, it can determine that the position of the object contacting or approaching is point A.
[0065] In one embodiment, such as Figure 6 As shown, the control circuit 20 includes a sensing circuit 21 and a driving circuit 22. The sensing circuit 21 is electrically connected to the first terminal of each touch electrode 10, and is used to sense the change in self-capacitance of each touch electrode 10. The driving circuit 22 is electrically connected to the first terminal of each touch electrode 10, and is used to output a driving signal to each touch electrode 10.
[0066] In this embodiment, by setting up a sensing circuit and a driving circuit, the touch sensor can not only sense the contact and proximity of objects, but also the user's touch, thereby improving the reliability of the touch sensor. Furthermore, the sensing circuit and driving circuit enable the sensing of the user's touch using a self-capacitance method. By multiplexing the driving circuit, the touch sensor can sense both the user's touch and the contact and proximity of objects, thus improving the reliability of the touch sensor.
[0067] In one embodiment, the control circuit 20 includes a sensing circuit 21 and a driving circuit 22. The sensing circuit 21 is electrically connected to the first terminal of each touch electrode 10, and is used to sense the change in mutual capacitance of different touch electrodes 10. The driving circuit 22 is electrically connected to the first terminal of each touch electrode 10, and is used to output a driving signal to each touch electrode 10.
[0068] In this embodiment, by setting up a sensing circuit and a driving circuit, the touch sensor can not only sense the contact and proximity of objects, but also the user's touch, thereby improving the reliability of the touch sensor. Furthermore, by multiplexing the sensing circuit and the driving circuit, the user's touch can be sensed using mutual capacitance. By multiplexing the driving circuit, the touch sensor can sense both the user's touch and the contact and proximity of objects, thus improving the reliability of the touch sensor.
[0069] In one embodiment, the control circuit 20 includes a sensing circuit 21 and a driving circuit 22. The sensing circuit 21 is electrically connected to the first terminal of each touch electrode 10, and is used to sense the change in self-capacitance of each touch electrode 10 and the change in mutual capacitance of different touch electrodes 10. The driving circuit 22 is electrically connected to the first terminal of each touch electrode 10, and is used to output a driving signal to each touch electrode 10.
[0070] In this embodiment, by setting up a sensing circuit and a driving circuit, the touch sensor can not only sense the contact and proximity of objects, but also the user's touch, thereby improving the reliability of the touch sensor. Furthermore, by multiplexing the sensing circuit and the driving circuit, the user's touch can be sensed using both self-capacitance and mutual capacitance methods. By multiplexing the driving circuit, the touch sensor can sense both the user's touch and the contact and proximity of objects, thus improving the reliability of the touch sensor.
[0071] For example, the touch electrode 10 includes a driving electrode TE and a sensing electrode RE. When the touch sensor senses a user's touch, the driving circuit 22 can provide a driving signal to the driving electrode TE and the sensing electrode RE, and the sensing circuit 21 can obtain the change in self-capacitance of the driving electrode TE and the sensing electrode RE respectively to sense the user's touch. The driving circuit 22 can also provide a driving signal to the driving electrode TE, and the sensing circuit 21 can obtain the change in mutual capacitance between the driving electrode TE and the sensing electrode RE to sense the user's touch. When the touch sensor senses the contact and proximity of an object, the driving circuit 22 can provide a driving signal to the driving electrode TE and the sensing electrode RE to form a sensing loop to sense the contact and proximity of the object.
[0072] For example, when the touch sensor senses the user's touch and when the touch sensor senses the contact and proximity of an object, the drive signal output by the drive circuit 22 can be the same or different.
[0073] In one embodiment, the touch signal includes a first touch signal from the touch device and a second touch signal from the user. When all switching units T are turned on, the plurality of touch electrodes 10 are used to sense the first touch signal. When all switching units T are turned off, the plurality of touch electrodes 10 are used to sense the second touch signal.
[0074] In this embodiment, when the switch unit is on, the touch sensor can sense the contact and proximity of an object; when the switch unit is off, the touch sensor can sense the user's touch. By controlling the on and off states of the switch unit to switch the type of touch sensor sensing, the difficulty of switching sensing types is reduced.
[0075] In one embodiment, such as Figure 7 As shown, the control circuit 20 includes a first control circuit 23 and a second control circuit 24. The first control circuit 23 is electrically connected to the first end of a portion of the touch electrodes 10. The second control circuit 24 is electrically connected to the first end of the other portion of the touch electrodes 10.
[0076] In this embodiment, since the non-touch area of the touch sensor surrounds the touch area, the touch area is used to house the touch electrodes, and the non-touch area is used to house the control circuit and control lines, etc., the control circuit is electrically connected to the touch electrodes through the control lines. By setting the control circuit as a first control circuit and a second control circuit, multiple control lines are connected to the touch electrodes through different paths via different control circuits, reducing the wiring difficulty in the non-touch area.
[0077] For example, the first control circuit 23 may include a sensing circuit 21 and a driving circuit 22. The second control circuit 24 may include a sensing circuit 21 and a driving circuit 22.
[0078] An exemplary embodiment of this disclosure provides a touch sensor, such as Figure 8 As shown, the touch sensor includes multiple driving electrodes TE, multiple sensing electrodes RE, multiple transistors T2, a first control circuit 23, and a second control circuit 24. The first control circuit 23 and the second control circuit 24 each include a sensing circuit 21 and a driving circuit 22. The multiple driving electrodes TE are arranged at intervals along a first direction, and the multiple sensing electrodes RE are arranged along a second direction, with the first and second directions perpendicular to each other. The sensing circuit 21 and the driving circuit 22 in the first control circuit 23 are electrically connected to a portion of the driving electrodes TE and a portion of the sensing electrodes RE, respectively. The sensing circuit 21 and the driving circuit 22 in the second control circuit 24 are electrically connected to another portion of the driving electrodes TE and another portion of the sensing electrodes RE, respectively. Two transistors T2 are disposed on three adjacent sensing electrodes RE. The middle sensing electrode RE is electrically connected to both the base and collector of the two transistors T2, respectively, while the sensing electrodes RE on both sides are electrically connected to the emitters of the two transistors T2, respectively. Two transistors T2 are set on the three adjacent driving electrodes TE. The driving electrode TE in the middle is electrically connected to the base and collector of the two transistors T2 respectively, and the driving electrodes TE on both sides are electrically connected to the emitter of the two transistors T2 respectively.
[0079] For example, at time t1, the touch sensor is used to sense the user's touch, and at times t2-t3, the touch sensor is used to sense the touch and proximity of an object. At time t1, the first control circuit 23 and the second control circuit 24 control all transistors T2 to turn off by outputting high-level signals to all driving electrodes TE and sensing electrodes RE, respectively. The first control circuit 23 and the second control circuit 24 can sense the user's touch through the sensing electrodes RE and driving electrodes TE in a self-capacitance and mutual capacitance manner, respectively. At times t2-t3, the first control circuit 23 and the second control circuit 24 turn on all transistors T2 by outputting high-level signals to the driving electrodes TE and sensing electrodes RE connected to the collector and base of transistors T2, and by outputting low-level signals to the driving electrodes TE and sensing electrodes RE connected to the emitter of transistors T2. At time t2, the first control circuit 23 and the second control circuit 24 provide a first driving signal to the touch device through the driving electrodes TE and sensing electrodes RE. At time t3, the first control circuit 23 and the second control circuit 24 stop providing the first drive signal to the touch device through the drive electrode TE and the sensing electrode RE, and the touch device outputs a coding signal. The first control circuit 23 and the second control circuit 24 output a second drive signal to the drive electrode TE and the sensing electrode RE. The first control circuit 23, the second control circuit 24, multiple transistors T2, and multiple drive electrodes TE form multiple sensing loops, such as the first sensing loop H1 and the second sensing loop H2. The first control circuit 23, the second control circuit 24, multiple transistors T2, and multiple sensing electrodes RE also form multiple sensing loops, such as the third sensing loop H3 and the fourth sensing loop H4. The coupling signal formed by the coupling of the sensing signal output from the sensing loop and the coding signal can determine the position of the touch device. After time t3 ends, the steps from time t1 to time t3 are repeated.
[0080] For example, during the process of the touch device contacting or approaching the touch sensor, the first control circuit 23 and the second control circuit 24 detect the coupling signal located in the first sensing loop H1 and the third sensing loop H3, and can determine that the position of the touch device contacting or approaching the touch sensor is point A.
[0081] In one exemplary embodiment, a display device is provided, which includes a touch sensor and a display unit as described above. The display unit has a plurality of pixels, and a touch electrode 10 is disposed on the display unit.
[0082] In this embodiment, since the display device includes a display unit and a touch sensor to realize the functions of displaying images and touch, the complexity of the touch sensor structure is reduced by replacing the external circuit with a switching unit through the touch sensor, thereby reducing the complexity of the display device structure.
[0083] In one exemplary embodiment, a touch device is provided, which includes a touch sensor as described above.
[0084] In this embodiment, since the touch device includes a touch sensor, replacing the external circuit with a switching unit by the touch sensor reduces the complexity of the touch sensor structure, thereby reducing the complexity of the touch device structure.
[0085] In one exemplary embodiment, a touch device is provided, which includes the display device as described above.
[0086] In this embodiment, since the touch device includes a display device and the display device includes a touch sensor, replacing the external circuit with a switching unit by the touch sensor reduces the complexity of the touch sensor structure, thereby reducing the complexity of the touch device structure.
[0087] In one exemplary embodiment, a touch system is provided, which includes a touch sensor and a touch device as described above.
[0088] In this embodiment, the touch sensor can be touched by a touch device. By including a touch sensor in the touch system, and replacing the external circuitry with a switching unit, the complexity of the touch sensor structure is reduced, thereby reducing the complexity of the touch system structure.
[0089] For example, the touch device can be a stylus.
[0090] In one embodiment, the touch electrode 10 is used to provide a drive signal to the touch device and to sense a first touch signal of the touch device through a sensing circuit.
[0091] In this embodiment, since the touch electrodes can be used to drive the touch device and form a sensing circuit, the complexity of the touch system structure is reduced by reusing the touch electrodes.
[0092] In one embodiment, at a first moment when all switching units T are turned on, the touch electrode 10 provides a drive signal to the touch device. At a second moment when all switching units T are turned on, the touch electrode 10 senses a first touch signal from the touch device through a sensing circuit. The second moment is later than the first moment.
[0093] In this embodiment, the touch electrode provides a drive signal to the touch device at a first moment to power the touch device, enabling the touch device to operate. At a second moment, the touch electrode stops providing the drive signal to the touch device. Since the touch device is still drivable, it outputs a coding signal, and the touch electrode forms a sensing loop through a transistor and control circuit to output a sensing signal. By coupling the sensing signal and the coding signal, the position of the touch device can be determined, thereby improving the reliability of the touch system.
[0094] In one exemplary embodiment, the touch device is, for example, a mobile phone, a laptop, a tablet computer, and a wearable device.
[0095] refer to Figure 9 As shown, the touch device 400 may include one or more of the following components: a processing component 402, a memory 404, a power supply component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416.
[0096] Processing component 402 typically controls the overall operation of touch device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.
[0097] Memory 404 is configured to store various types of data to support operation on touch device 400. Examples of this data include instructions for any application or method operating on touch device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.
[0098] Power supply component 406 provides power to various components of touch device 400. Power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to touch device 400.
[0099] Multimedia component 408 includes a screen that provides an output interface between touch device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera module and / or a rear-facing camera module. When the touch device 400 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera module and / or the rear-facing camera module may receive external multimedia data. Each front-facing camera module and rear-facing camera module may be a fixed optical lens system or have focal length and optical zoom capabilities.
[0100] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when the touch device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.
[0101] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.
[0102] Sensor assembly 414 includes one or more sensors for providing state assessments of various aspects of touch device 400. For example, sensor assembly 414 may detect the on / off state of touch device 400, the relative positioning of components such as the display and keypad of touch device 400, changes in the position of touch device 400 or a component of touch device 400, the presence or absence of user contact with touch device 400, the orientation or acceleration / deceleration of touch device 400, and temperature changes of touch device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.
[0103] Communication component 416 is configured to facilitate wired or wireless communication between touch device 400 and other terminals. Touch device 400 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
[0104] In an exemplary embodiment, the touch device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.
[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0107] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.
[0108] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.
Claims
1. A touch sensor, characterized in that, The touch sensor includes: Multiple touch electrodes, which are used to sense touch signals; A control circuit, wherein the control circuit is electrically connected to the first end of each of the touch electrodes; Multiple switching units, each of the switching units being electrically connected between the second ends of the two touch electrodes; The conducting switch unit forms a sensing loop with the two electrically connected touch electrodes and the control circuit.
2. The touch sensor according to claim 1, characterized in that, The switching unit includes: The transistor has its emitter and collector electrically connected to the second ends of two adjacent touch electrodes, and its base and collector electrically connected.
3. The touch sensor according to claim 2, characterized in that, The plurality of touch electrodes include a first electrode and a second electrode; the first electrode is electrically connected to the emitter of the transistor, and the second electrode is electrically connected to both the collector and the base of the transistor.
4. The touch sensor according to claim 1, characterized in that, The plurality of touch electrodes include: Multiple driving electrodes are arranged at intervals along a first direction; Multiple sensing electrodes are arranged at intervals along a second direction; Wherein, the first direction and the second direction are perpendicular.
5. The touch sensor according to claim 1, characterized in that, The control circuit includes: A sensing circuit is electrically connected to the first end of each of the touch electrodes. The sensing circuit is used to sense the change in self-capacitance of each of the touch electrodes and / or the change in mutual capacitance of different touch electrodes. A driving circuit is provided, which is electrically connected to the first end of each of the touch electrodes, and is used to output a driving signal to each of the touch electrodes.
6. The touch sensor according to claim 1, characterized in that, The touch signal includes a first touch signal from the touch device and a second touch signal from the user; when all the switching units are turned on, the plurality of touch electrodes are used to sense the first touch signal; When all the aforementioned switch units are disconnected, the plurality of touch electrodes are used to sense the second touch signal.
7. The touch sensor according to any one of claims 1 to 6, characterized in that, The control circuit includes: A first control circuit, wherein the first control circuit is electrically connected to the first end of a portion of the touch electrodes; The second control circuit is electrically connected to the first end of the other part of the touch electrode.
8. A display device, characterized in that, The display device includes a touch sensor and a display unit as described in any one of claims 1 to 7; the display unit has a plurality of pixels, and the plurality of touch electrodes are disposed on the display unit.
9. A touch device, characterized in that, The touch device includes a touch sensor as described in any one of claims 1 to 7 or a display device as described in claim 8.
10. A touch system, characterized in that, The touch system includes the touch device and touch apparatus as described in claim 9.
11. The touch system according to claim 10, characterized in that, The touch electrode is used to provide a drive signal to the touch device and to sense a first touch signal of the touch device through the sensing circuit.