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WO2018157268A1 - Procédé et dispositif de détection de toucher - Google Patents

Procédé et dispositif de détection de toucher Download PDF

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Publication number
WO2018157268A1
WO2018157268A1 PCT/CN2017/075085 CN2017075085W WO2018157268A1 WO 2018157268 A1 WO2018157268 A1 WO 2018157268A1 CN 2017075085 W CN2017075085 W CN 2017075085W WO 2018157268 A1 WO2018157268 A1 WO 2018157268A1
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WO
WIPO (PCT)
Prior art keywords
coding mode
driving
lines
touch
touch surface
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.)
Ceased
Application number
PCT/CN2017/075085
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English (en)
Chinese (zh)
Inventor
陈小祥
周威
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Priority to PCT/CN2017/075085 priority Critical patent/WO2018157268A1/fr
Priority to CN201780000146.8A priority patent/CN109074201A/zh
Publication of WO2018157268A1 publication Critical patent/WO2018157268A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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

Definitions

  • Embodiments of the present invention relate to the field of information technology, and, more particularly, to a method and apparatus for touch detection.
  • touch-sensing technology has been widely used due to its comfortable operation and convenience.
  • consumer electronics such as notebook computers, mobile phones, and MP3s
  • touch pads, touch screens, and touch buttons are widely used in such electronic products.
  • touch technologies the more advanced one is capacitive touch technology.
  • the principle of capacitive touch sensing can be described as: detecting the capacitance between the sensing electrode itself or the two sensing electrodes through one or more capacitive sensors, and judging the change of the capacitance to determine the touch of the finger or other object on the sensing electrode ( Touch).
  • the common coding method for capacitive screens is the mutual coupling capacitance (mutual capacitance) and the self-coupling capacitance (self-capacitance).
  • Different coding methods will have different data characteristics for touch characterization.
  • the identification of water states (also known as water states) has been the most common and difficult problem facing touch screens. When there is dripping water on the screen, water film and water on the finger, the touch screen may be invalid, and the finger touch may not be accurately recognized, or abnormal clicks and scribing may occur. Therefore, how to accurately detect the water state becomes a technical problem to be solved urgently.
  • Embodiments of the present invention provide a method and apparatus for touch detection, which can accurately detect a water state.
  • a method of touch detection comprising:
  • the plurality of driving lines are coded by using a first coding mode, wherein, in the first coding mode, the first driving line of the plurality of driving lines is positive coded, and the second driving line is not coded.
  • the first driving line and the second driving line are adjacent to each other;
  • the plurality of driving lines are coded by using the first coding mode, and according to the first
  • the change value of the signal amount outputted by the plurality of driving lines in a coder mode determines whether the touch surface is in a water state.
  • the technical solution of the embodiment of the present invention can accurately detect the water state, because the change value of the semaphore of the output of the drive line is different from that of the normal touch.
  • the multiple driving lines include 2k driving lines, where k is a positive integer, and the first driving line includes the first, third, ..., 2k of the plurality of driving lines - 1 drive line, the second drive line comprising 2, 4, ..., 2k drive lines of the plurality of drive lines.
  • determining whether the touch surface is in a water state according to a change value of the signal quantity output by the plurality of driving lines in the first coding mode including:
  • the change value of the signal amount output by the second driving line is less than a predetermined threshold, determining that the touch surface is in a water state, wherein the predetermined threshold value is a negative value.
  • the method further includes:
  • the plurality of driving lines are coded by using a second coding mode, wherein, in the second coding mode, the plurality of driving lines are all playing a positive code;
  • the first coding mode and the second coding mode are alternately employed.
  • the second coding mode is employed.
  • determining the touch point on the touch surface according to the change value of the signal quantity output by the multiple driving lines in the second coding mode including:
  • a touch point on the touch surface is determined based on the data after the noise reduction process.
  • a mutual capacitance waterproofing process is performed.
  • an apparatus for touch detection comprising means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • an apparatus for touch detection including a processor and a memory.
  • the memory is used to store instructions that the processor uses to execute the instructions.
  • the processor executes the instructions stored by the memory The execution causes the processor to perform the method of the first aspect or any possible implementation of the first aspect.
  • an electronic device comprising the device of the touch detection of the second aspect or the third aspect described above.
  • a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • FIG. 1 is a schematic flowchart of a method for touch detection according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a normal touch in the first coding mode according to the embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a water state in a first coding mode according to an embodiment of the present invention.
  • FIG. 4 is another schematic flowchart of a method for touch detection according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a water state in a second coding mode according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a normal touch in a second coding mode according to an embodiment of the present invention.
  • FIG. 7 is a data curve obtained by using a second coding method according to an embodiment of the present invention.
  • FIG. 8 is a graph of data noise reduction processing according to an embodiment of the present invention.
  • FIG. 9 is a schematic block diagram of an apparatus for touch detection according to an embodiment of the present invention.
  • FIG. 10 is a schematic block diagram of an apparatus for touch detection according to another embodiment of the present invention.
  • the water state represents a touch surface, such as the surface of a touch screen or touch pad, in the state of water.
  • the technical solution of the embodiment of the invention can accurately detect the water state, so that the electronic device can operate normally in the presence of water.
  • the term “coding” may also be referred to as "signaling".
  • the drive line is coded to indicate the input signal to the input of the drive line.
  • the change value of the semaphore (also referred to as a difference value) is a change value obtained by subtracting the original semaphore from the original semaphore. It should be understood that the original semaphore can be the original semaphore as a reference. It is updated with the baseline update, not every frame.
  • FIG. 1 shows a schematic flow chart of a method 100 of touch detection according to an embodiment of the present invention. As shown in FIG. 1, the method 100 can include:
  • the first driving mode is used to code a plurality of driving lines, wherein, in the first coding mode, the first driving line of the plurality of driving lines is positive code, and the second driving circuit is not playing. a code, the first driving line and the second driving line are adjacent to each other;
  • the water state detection is implemented by using the first coding mode.
  • the first coding mode is alternate coding mode, that is, one drive line is playing a positive code, the next drive line is not coded, and so on.
  • the first driving line includes the first, third, ..., 2k-1 driving lines of the plurality of driving lines
  • the second driving circuit includes 2, 4, ..., 2k driving lines of the plurality of driving lines. That is to say, the first, third, ..., 2k-1 drive lines are positive, and the 2, 4, ..., 2k drive lines are not coded.
  • FIG. 2 is a schematic diagram of a normal touch in the first coding mode.
  • TX1 is the transmitting end of the first driving line, that is, the input end
  • RX1 is the receiving end of the first driving line, that is, the output end.
  • TX1 plays a positive signal, and TX2 does not make a signal.
  • C1 will increase and a human body-to-ground capacitance C2 will appear.
  • Capacitor C1 will introduce the signal on TX1 to TX2, and RX2 will receive the signal imported through C1.
  • C2 will import the signals of TX1 and TX2 to the ground. Under normal circumstances, C2 is larger than C1. Therefore, most of the semaphores of TX1 and TX2 are introduced to the ground, and RX1 appears.
  • the value detected by RX2 is smaller than the original one, and positive values appear.
  • Fig. 3 is a schematic view showing the water state in the first coding mode.
  • TX1 is the transmitting end of the first driving line, that is, the input end
  • RX1 is the receiving end of the first driving line, that is, the output end.
  • TX1 plays a positive signal, and TX2 does not make a signal.
  • the water-to-ground capacitance can be neglected, and C1 will increase.
  • the role of C1 is to transfer the TX1 signal to TX2.
  • RX1 will receive less signal than the original, and a positive change will occur.
  • RX2 will receive more semaphores than the original, and a negative change will occur.
  • the overall characteristic of all drive lines is the phenomenon of positive and negative alternating. Based on this, the water state can be well recognized.
  • determining whether the touch surface is in a water state according to a change value of a signal amount output by the plurality of driving lines in the first coding mode.
  • a negative change value occurs at the output of the second drive line. Therefore, the water state can be determined according to the change value of the signal amount outputted by the second drive line.
  • the change value of the signal quantity output by the second driving line is less than a predetermined threshold, determining that the touch surface is in a water state, wherein the predetermined threshold value is a negative value.
  • the touch surface may be determined to be in a water state when the change value of the signal amount output by the second driving line is less than a predetermined threshold.
  • the predetermined threshold is a negative value.
  • the accuracy of the judgment can be improved by comparing with the predetermined threshold.
  • this should not be construed as limiting the embodiments of the invention. That is to say, it is also possible to determine that the touch surface is in a water state when the change value of the signal amount outputted by the second driving line is a negative value.
  • the determination may also be performed according to data of multiple frames. For example, if the change value of the semaphore output by the second driving line is less than a predetermined threshold in the data of consecutive multiple frames (such as 3 frames), it is determined that the touch surface is in a water state.
  • a predetermined threshold in the data of consecutive multiple frames (such as 3 frames)
  • the determination may be further performed in combination with a change value of the signal amount output by the first driving line.
  • the touch surface is determined to be in a water state in combination with the condition that the change value of the signal amount output by the first drive line is a positive value.
  • the plurality of driving lines are coded by using the first coding mode, and the touch surface is determined to be in a water state according to the change value of the signal quantity outputted by the plurality of driving lines in the first coding mode.
  • the technical solution of the embodiment of the present invention can accurately detect the water state, because the change value of the semaphore of the output of the drive line is different from that of the normal touch.
  • the state of the water may affect the determination of the touch point, for example, there may be a point of occurrence, a point of elimination, or a disconnection.
  • the pointing point indicates that the screen displays a touch without a normal touch; the erasing point refers to the screen not displaying the touch in the case of a normal touch; the broken line refers to the multi-finger operation when the scribing is performed, the screen cannot completely output the drawn track.
  • the embodiment of the present invention further provides another coding mode to accurately determine the touch point.
  • the method 100 may further include:
  • the second coding mode multiple driving lines are positively coded, so that the influence of water is small, and thus the true touch point can be accurately determined.
  • FIG. 5 and FIG. 6 the working principle of the second coding mode will be described by taking two driving lines as an example.
  • Fig. 5 is a schematic view showing the water state in the second coding mode.
  • TX1 is the transmitting end of the first driving line, that is, the input end
  • RX1 is the receiving end of the first driving line, that is, the output end.
  • both TX1 and TX2 play a positive signal.
  • C1 will increase, but since TX1 and TX2 are both at the same time, the potential difference between them is relatively small, and the signal flowing on C1 will be small, so the influence on the signals received by RX1 and RX2 will be smaller.
  • FIG. 6 is a schematic diagram of a normal touch in the second coding mode.
  • TX1 is the transmitting end of the first driving line, that is, the input end
  • RX1 is the receiving end of the first driving line, that is, the output end.
  • both TX1 and TX2 play a positive signal.
  • C1 When a normal finger is touched, C1 will increase and a human body-to-ground capacitance C2 will appear.
  • the signal passed in C1 will be small, but there will be a lot of signals flowing in C2. Therefore, the semaphores received by RX1 and RX2 will change greatly, and positive changes will occur.
  • the influence of water is small, so that the water caused by the water can be suppressed, thereby accurately determining the true touch point.
  • the first coding mode and the second coding mode may be alternately adopted.
  • the current frame adopts the first coding mode
  • the next frame adopts the second coding mode.
  • the second coding mode is adopted.
  • only the second coding mode can be used to suppress the water-induced drop, thereby accurately determining the touch point.
  • the touch point on the touch surface is determined according to the change value of the signal quantity output by the plurality of driving lines in the second coding mode. For example, whether or not it is a touch point can be determined according to whether the change value of the semaphore is greater than a threshold.
  • the collected self-contained data is easily disturbed, such as interference from a liquid crystal display (LCD). Therefore, optionally, the variation value of the signal quantity output by the plurality of driving lines in the second coding mode may be first subjected to noise reduction processing; and then the data on the touch surface is determined according to the data after the noise reduction processing. Touch the point.
  • LCD liquid crystal display
  • the data in the second coding mode is first subjected to noise reduction processing, and after noise reduction, it is determined whether there is a touch according to the threshold.
  • FIG. 7 is a data curve obtained by using the second coding method when two fingers are touched
  • FIG. 8 is a curve after the data noise reduction processing of FIG. 7.
  • the data collected in the first coding mode and the second coding mode in the embodiment of the present invention is self-contained data. Therefore, the detection method in the embodiment of the present invention is a self-capacity detection mode.
  • the various embodiments described above may also be implemented in combination with mutual waterproofing.
  • the mutual resistance water repellent treatment may be performed after determining that the touch surface is in a water state.
  • the mutual-capacity waterproofing process can adopt any mutual-capacity waterproofing technology, which is not limited by the embodiment of the present invention.
  • the self-capacity reference After the initial power-on or frequency hopping, the self-capacity reference can not be restored to normal immediately. At this time, the self-capacity water state detection and point suppression can be performed, and the mutual-capacity water state detection can be turned on. After the self-capacity reference is updated, the mutual-capacity water state detection is turned off, and the self-capacity water state detection and suppression are turned on.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the apparatus in the embodiments of the present invention may perform the method in the embodiment of the present invention, and have the function of executing the corresponding method.
  • FIG. 9 shows a schematic block diagram of a device 900 for touch detection in accordance with an embodiment of the present invention.
  • the apparatus 900 can include:
  • the coding module 930 is configured to code the plurality of driving lines 920 by using a first coding mode, wherein, in the first coding mode, the first driving line of the plurality of driving lines 920 is played a positive code, the second driving line is not coded, and the first driving line and the second driving line are adjacent to each other;
  • the processing module 940 is configured to determine, according to the change value of the signal quantity output by the plurality of driving lines 920 in the first coding mode, whether the touch surface is in a water state.
  • the multiple driving lines 920 include 2k driving lines, where k is a positive integer, and the first driving line includes the first and third of the plurality of driving lines. , ..., 2k-1 drive lines, the second drive line comprising 2, 4, ..., 2k drive lines of the plurality of drive lines.
  • the processing module 940 is configured to: if the change value of the semaphore output by the second driving line is less than a predetermined threshold, determine that the touch surface is in a water state, wherein The predetermined threshold is a negative value.
  • the coding module 930 is configured to code the multiple driving lines 920 by using a second coding mode, where, in the second coding mode, The plurality of driving lines 920 are all positively coded;
  • the processing module 940 is configured to determine a touch point on the touch surface according to a change value of a signal quantity output by the plurality of driving lines 920 in the second coding mode.
  • the coding module 930 is configured to alternately adopt the first coding mode and the second coding mode.
  • the coding module 930 is configured to adopt the second coding mode after determining that the touch surface is in a water state.
  • the processing module 940 is configured to perform noise reduction processing on a change value of a signal quantity output by the multiple driving lines in the second coding mode;
  • the subsequent data determines touch points on the touch surface.
  • the processing module 940 is configured to perform mutual capacitance waterproof processing after determining that the touch surface is in a water state.
  • the touch detection device 900 of the embodiment of the present invention may correspond to the execution body of the touch detection method of the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the touch detection device 900 are respectively for the foregoing respective methods.
  • the corresponding process, for the sake of brevity, will not be described here.
  • FIG. 10 shows a schematic block diagram of a device 1000 for touch detection according to another embodiment of the present invention.
  • the apparatus 1000 includes a plurality of drive lines 1020, a processor 1030, and a memory 1040.
  • the memory 1040 is for storing programs. Specifically, the program may include program code, the process The sequence code includes computer operating instructions. Memory 1040 can include read only memory and random access memory and provides instructions and data to processor 1030. The memory 1040 may include a high-speed random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
  • RAM high-speed random access memory
  • a program for implementing the method of touch detection of the embodiment of the present invention described above may be stored in the memory 1040.
  • the processor 1030 executes a program stored in the memory 1040 for performing the touch detection method of the embodiment of the present invention described above.
  • Processor 1030 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 1030 or an instruction in a form of software.
  • the processor 1030 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc., or may be a digital signal processor (DSP), dedicated. Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 1040, and the processor 1030 reads the information in the memory 1040 and performs the steps of the above method in combination with its hardware.
  • the embodiment of the invention further provides an electronic device, which may include the device for touch detection in the above embodiment of the invention.
  • the term "and/or” is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and/or B may indicate that A exists separately, and A and B exist simultaneously, and B cases exist alone.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un procédé et un dispositif de détection de toucher. Le procédé consiste : à utiliser un premier mode d'entrée de signal pour faire entrer des signaux dans une pluralité de lignes d'excitation, dans le premier mode d'entrée de signal, un signal positif étant entré dans la première ligne d'excitation de la pluralité de lignes d'excitation, aucun signal n'étant entré dans la deuxième ligne d'excitation, la première ligne d'excitation et la deuxième ligne d'excitation étant adjacentes (110) ; à déterminer, en fonction de la valeur d'un changement de la quantité de signaux émis par la pluralité de lignes d'excitation dans le premier mode d'entrée de signal, si une surface de toucher est dans un état de veille (120). Le procédé et le dispositif de détection de toucher peuvent détecter avec précision un état de veille.
PCT/CN2017/075085 2017-02-28 2017-02-28 Procédé et dispositif de détection de toucher Ceased WO2018157268A1 (fr)

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PCT/CN2017/075085 WO2018157268A1 (fr) 2017-02-28 2017-02-28 Procédé et dispositif de détection de toucher
CN201780000146.8A CN109074201A (zh) 2017-02-28 2017-02-28 触摸检测的方法和装置

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PCT/CN2017/075085 WO2018157268A1 (fr) 2017-02-28 2017-02-28 Procédé et dispositif de détection de toucher

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CN103995626A (zh) * 2013-02-19 2014-08-20 比亚迪股份有限公司 一种用于触摸屏的触摸点定位方法及装置
CN104423736A (zh) * 2013-08-29 2015-03-18 天津富纳源创科技有限公司 触摸屏触摸识别方法
US8982097B1 (en) * 2013-12-02 2015-03-17 Cypress Semiconductor Corporation Water rejection and wet finger tracking algorithms for truetouch panels and self capacitance touch sensors
CN104063101A (zh) * 2014-05-30 2014-09-24 小米科技有限责任公司 触摸屏控制方法和装置
CN105844262A (zh) * 2016-04-25 2016-08-10 广东欧珀移动通信有限公司 一种湿手操作模式下结合指纹判断触摸位置的方法及装置

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