WO2011035737A1 - 一种唤醒触摸系统的方法以及触摸系统 - Google Patents

一种唤醒触摸系统的方法以及触摸系统 Download PDF

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Publication number
WO2011035737A1
WO2011035737A1 PCT/CN2010/077404 CN2010077404W WO2011035737A1 WO 2011035737 A1 WO2011035737 A1 WO 2011035737A1 CN 2010077404 W CN2010077404 W CN 2010077404W WO 2011035737 A1 WO2011035737 A1 WO 2011035737A1
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WO
WIPO (PCT)
Prior art keywords
touch
wake
signal
touch operation
deformation
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Application number
PCT/CN2010/077404
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English (en)
French (fr)
Inventor
刘建军
叶新林
刘新斌
Original Assignee
北京汇冠新技术股份有限公司
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Publication of WO2011035737A1 publication Critical patent/WO2011035737A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3262—Power saving in digitizer or tablet
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3215—Monitoring of peripheral devices
    • 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
    • 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual

Definitions

  • the present invention relates to the field of photodetection technology, and more particularly to a method for waking up a touch system in a touch system including a touch screen. Background technique
  • Electronic displays with touch input capabilities are used in a variety of devices, including portable and handheld devices.
  • a typical touch screen is mounted on an electronic display.
  • the touch screen can be a capacitive touch screen, a resistive touch screen, an infrared touch screen, a surface acoustic wave touch screen, or a camera touch screen.
  • the increased focus on portable and handheld electronic devices has led to a proliferation of such devices. This concern has also raised concerns about the useful life of portable and handheld devices, especially in terms of power requirements.
  • the technique of reducing the power consumption in the touch input device can advantageously extend the life of the portable electronic device, and the portable electronic device can also use the touch input function in the case of recharging or replacing the battery. Summary of the invention
  • a method of waking up a touch system comprising: detecting a deformation of a touch panel or a bezel of the touch screen when a touch operation occurs on a touch screen of the touch system;
  • a touch system comprising:
  • a sensor that detects a deformation of a touch panel or a bezel of the touch screen when there is a touch operation on the touch screen
  • a wake-up device that determines whether the touch operation is an effective touch operation or an erroneous touch operation according to a deformation of the touch panel or the bezel detected by the sensor, in response to the effective touch when the touch operation is an effective touch operation Operating, generating a wake-up signal, and transmitting the wake-up signal to the control device;
  • FIG. 1 is a flow chart of a method of waking up a touch system according to an embodiment of the present invention
  • FIG. 2 is a flow chart of a specific example of the embodiment shown in FIG.
  • FIG. 3 is a flow chart showing another specific example of the embodiment shown in Figure 1;
  • FIG. 4 is a schematic structural diagram of a touch system according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of a modification of the touch system of the embodiment shown in FIG. 4.
  • FIG. 6 is a schematic structural view of another modification of the touch system of the embodiment shown in FIG. 4.
  • FIG. 7 is a view of FIG. A schematic diagram of the mounting of the sensor on the touch panel in the touch system of the embodiment;
  • Figure 8 is a schematic structural view showing an example of a wake-up device in the embodiment shown in Figures 4 to 6;
  • Figure 9 is a structural schematic view showing another example of the wake-up device in the embodiment shown in Figures 4 to 6;
  • Figure 10 is a schematic view showing an example of a control device in the embodiment shown in Figures 4 to 6
  • Figure 11 is a schematic view showing another example of the control device in the embodiment shown in Figures 4 to 6;
  • FIG. 12 is a schematic structural diagram of a touch system according to another embodiment of the present invention.
  • FIG. Figure 13 is a cross-sectional view of the touch screen of the touch system of the embodiment of Figure 12;
  • Figure 14 is a schematic view showing the mounting of the sensor on the bezel in the touch system of the embodiment shown in Figure 12; detailed description
  • the term "effective touch” refers to a touch panel or frame deformation that is desired to be interpreted as a touch input, an event that causes such a touch panel shape or frame change, and The sensor receives signals from these touch panel deformations or bezels.
  • the term “false touch” refers to a touch panel deformation or bezel that is not desired to be interpreted as a touch input, an event that causes such a touch panel deformation or bezel, and a sensor that receives these touch panel deformations or borders. signal of.
  • a false touch includes a signal generated by the deformation of the touch panel in the system due to changes in ambient temperature or air pressure, flying insects touching the touch panel, and raindrops to the touch panel.
  • the touch system of the present invention refers to a system including a touch screen. The touch system sleeps if there is no valid touch operation for a preset period of time.
  • FIG. 1 is a flow chart of a method of waking up a touch system in accordance with one embodiment of the present invention. The present embodiment will be described in detail below with reference to the accompanying drawings.
  • step 101 a deformation of a touch panel or a bezel of the touch screen in the touch system is detected.
  • a touch operation occurs on the touch screen
  • deformation of the touch panel or the frame caused by the touch operation is detected.
  • the touch operation will cause a certain degree of deformation of the touch panel or the bezel.
  • the size of the touch panel or bezel is related to the touch operation that the touch screen is subjected to. For example, when a flying insect hits a touch screen, the touch operation may only cause a small deformation of the touch panel or the bezel.
  • the deformation of the touch panel or the frame caused by an adult conscious touch screen for a touch operation is large.
  • the sensor can be used to detect the deformation of the touch panel or the bezel.
  • the sensor can be, for example, a strain gauge, a fiber optic sensor, a piezoelectric element, and any combination thereof.
  • the sensor can generally be mounted on a touch panel or bezel, the details of which will be described later.
  • the deformation of the touch panel or the frame detected by the sensor can be generally represented by one of a voltage signal, a current signal, an analog signal, and a digital signal.
  • step 105 it is determined whether the touch operation is a valid touch operation or a false touch operation according to the deformation of the touch panel or the bezel detected in step 101.
  • the above determination can be made by comparing the deformation of the touch panel or the bezel with a predetermined threshold.
  • the deformation information indicating the deformation of the touch panel or the frame obtained by the step 101 for example, an analog signal or a digital signal such as a voltage signal or a current signal, is compared with a predetermined threshold. If the deformation information is greater than or equal to the predetermined threshold, it is determined that the touch operation is a valid touch operation, and step 110 is performed. If the deformation information is less than the predetermined threshold, it is determined that the touch operation is a false touch operation, and step 115 is performed.
  • a wake-up signal is generated for transitioning the control of the touch system from a sleep state to an operational state.
  • the wake-up signal generated at step 110 is sent to the control device to cause the control device to transition from the sleep state to the operational state.
  • step 115 since the touch operation is determined to be an erroneous touch operation, no wake-up signal is generated, and no processing is performed.
  • Fig. 2 is a view showing a specific example of the embodiment shown in Fig. 1. The specific example will be described in detail below with reference to the accompanying drawings, wherein the same portions as those of the previous embodiment are appropriately omitted.
  • step 201 when a touch operation occurs on the touch screen, the deformation of the touch panel is detected.
  • the deformation of the touch panel can be measured by detecting the deformation of the touch panel in a direction parallel to the touch panel.
  • the detected deformation can be represented by a voltage signal, a current signal, or the like.
  • step 205 the deformation information indicating the deformation of the detected touch panel is compared with a predetermined threshold, and in step 210, it is determined whether the touch operation is a valid touch operation or a false touch operation.
  • step 215 it is determined that the touch operation is a valid touch operation
  • step 220 is performed.
  • step 215 a wake-up signal is generated for transitioning the control device from a sleep state to an operational state. Then, in step 225, the generated wake-up signal is sent to the control device.
  • the wake-up signal is first sent to the bus controller of the control device to cause the bus controller to transition from a sleep state to an operational state. Then, the bus controller determines whether it is necessary to wake up the main processor of the control device. When it is determined that the main processor needs to be woken up, the bus controller sends a second wake-up signal to the main processor to cause the main processor to switch from the sleep state to the run. status. In another embodiment, the wake-up signal can be simultaneously sent to the bus controller and main processor of the control device to enable them to transition from a sleep state to an operational state.
  • step 220 since the touch operation on the touch screen is determined to be a false touch operation in step 210, no wake-up signal is generated, and no processing is performed on the touch operation.
  • Fig. 3 is a flow chart showing another specific example of the embodiment shown in Fig. 1.
  • This specific example is basically the same as the specific example shown in Fig. 2, and the only difference is that in the specific example shown in Fig. 3, the deformation of the frame is detected. That is, in step 1301, when a touch operation occurs on the touch screen, the deformation of the bezel is detected, for example, detecting the deformation of the bezel in a direction parallel to the bezel, or detecting the deformation of the bezel in other directions.
  • the remaining steps 1305-1325 are the same as steps 205-225 in Fig. 2, and the description thereof is omitted here.
  • the method of the above embodiment detects the deformation of the touch panel or the frame caused by the touch operation, and confirms whether the touch operation is an effective touch operation or a false touch operation according to the detected deformation of the touch panel or the frame, and is effective.
  • a touch operation a wake-up signal is generated to cause the control device to be woken up, and in the case of an erroneous touch operation, no processing is performed, thereby waking up the touch system by the wake-up signal, effectively shielding the false touch operation.
  • a wake-up signal is generated to cause the control device to be woken up, and in the case of an erroneous touch operation, no processing is performed, thereby waking up the touch system by the wake-up signal, effectively shielding the false touch operation.
  • FIG. 4 is a schematic structural view of a touch system according to an embodiment of the present invention. The present embodiment will be described in detail below with reference to the accompanying drawings.
  • the touch system includes: a touch screen 301; a sensor 305 that detects deformation of a touch panel or a frame of the touch screen 301 when a touch operation is performed on the touch screen; and a wake-up device 306 that detects a touch panel or a frame according to the sensor 305 Deformation determines that the touch operation is valid a touch operation or an erroneous touch operation, and when the touch operation is a valid touch operation, generating a wake-up signal in response to the effective touch operation, and transmitting a wake-up signal to the control device 307; and a control device 307 according to the wake-up device 306 Wake up signal, transition from sleep state to running state.
  • touch screen 301 is an optical touch screen that utilizes an image sensor and uses triangulation to position the touch object.
  • the optical touch screen includes an infrared light source 303 as a light source, a retroreflective strip 302, two infrared cameras 304 as image sensors, and a touch panel.
  • the infrared camera 304 is installed at two adjacent corners of the touch panel, the infrared light source 303 is installed near the infrared camera 304, and the retroreflective strip 302 is mounted on the three edges of the touch panel for The light from the infrared source 303 is reflected back to the vicinity of the infrared source 303 to provide the infrared image head 304 with the illumination required to capture the image information of the touch object.
  • sensors 305 are included, which are respectively mounted on both edges of the touch surface of the touch panel for detecting the deformation of the touch panel.
  • Sensor 305 can be one or more of a strain gauge, a fiber optic sensor, a piezoelectric element.
  • the sensor 305 is a fiber optic sensor because the fiber sensor is highly sensitive and can detect the deformation of the touch panel well.
  • the present embodiment uses four sensors 305.
  • sensors 305 can be used.
  • the detection effect will be poor.
  • the sensor 305 is mounted on the touch surface of the touch panel to detect the deformation of the touch screen in this embodiment, the sensor 305 can be mounted at other positions of the touch panel.
  • FIGS. 5 and 6 respectively show variations of the touch system of the embodiment shown in FIG. 4, which differ from FIG. 4 in that the mounting position of the sensor 305 on the touch panel 301 is different.
  • the sensor 305 is mounted on the opposite side of the touch surface of the touch panel, that is, on the lower surface of the touch panel.
  • the sensor 305 is indicated by a broken line.
  • the sensor 305 is mounted on the side of the touch panel.
  • the sensor 305 can also be mounted at the corner of the touch panel The specific case will be described later with reference to FIG. Figure 7 shows a schematic diagram of the above three mounting arrangements of the sensor 305 mounted on the touch panel.
  • the sensor 305 can also detect the deformation of the bezel.
  • the sensor 305 is mounted on the bezel, such as on the upper, lower or side of the bezel.
  • Fig. 8 is a view showing the configuration of an example of the wake-up device 306 in the above embodiment.
  • the wake-up device 306 includes a signal amplifying circuit 601, a low-pass filter 602, a peak shaping circuit 603, a comparison circuit 604, and a threshold generating unit 605.
  • the wake-up device 306 receives a signal (e.g., a voltage signal) indicative of a deformation of the touch panel or bezel from the sensor 305, the signal is first amplified by the signal amplifying circuit 601.
  • a signal e.g., a voltage signal
  • the amplification factor of the signal amplifying circuit 900 can be adjusted according to the actual situation, usually about 30 times.
  • the signal amplified by the signal amplifying circuit 900 enters the low pass filter 901 to filter out a signal higher than the frequency of the effective signal. Usually, the effective signal is less than 1KHZ.
  • the valid signal is then shaped by peak shaping circuit 902 and provided to comparison circuit 604.
  • the peak shaped valid signal is compared to a threshold (e.g., threshold voltage signal) generated by threshold generation unit 605. If the peak-shaped effective signal is greater than or equal to the threshold, the signal output by the sensor 305 is a valid touch signal indicating a valid touch operation.
  • a threshold e.g., threshold voltage signal
  • the comparison circuit 604 generates a wake-up signal and outputs the wake-up signal, usually the wake-up signal is Low level signal. If the peak shaped signal is less than the threshold, the signal output by the sensor 305 is an erroneous touch signal indicating an erroneous touch operation, at which time the comparison circuit 604 does not generate a wake-up signal.
  • the sensitivity of the entire wake-up device 306 can be adjusted by adjusting the threshold.
  • Fig. 9 is a view showing the configuration of another example of the wake-up device 306 in the above embodiment.
  • the wake-up device 306 includes a signal amplifying circuit 601, a low pass filter 602, an A/D converter 606, and a processor 607.
  • the signal amplifying circuit 601 amplifies a signal output from the sensor 305 indicating the deformation of the touch panel or the bezel to facilitate subsequent processing.
  • the amplification factor of the signal amplifying circuit 601 can be adjusted according to actual conditions, and is usually about 30 times.
  • Signal The signal amplified by the amplifying circuit 601 enters the low pass filter 602 to filter out high frequency signals other than the effective signal, and the effective signal is usually less than 1 kHz.
  • the A/D converter 606 converts the analog signal output from the low pass filter 901 into a digital signal and supplies it to the processor 607.
  • the processor 607 determines whether the digitized signal is a valid touch signal or a false touch signal, and if it is a valid touch signal, the processor outputs a wake-up signal.
  • the processor 607 can also determine whether the signal from the sensor 305 is a valid touch signal or a false touch signal by waveform recognition.
  • Control device 307 is coupled to wake-up device 306 and can receive a wake-up signal from wake-up device 306 and transition from a sleep state to an operational state based on the wake-up signal.
  • the control device 307 is also coupled to the touch panel to receive signals from the touch panel to calculate the location of the touch object.
  • Fig. 10 shows an example of the control device 307 in the above embodiment.
  • the control device 307 includes a main processor 701, a bus 704, and an interface 705.
  • Control device 307 can communicate with the touch panel via interface 705.
  • the control device 307 can also be integrated with the touch screen 301.
  • wake-up device 306 is also coupled to host processor 701 in control device 307 via interface 705.
  • the main processor 701 is responsible for calculating the touch position of the touch object.
  • Main processor 701 also manages signal transmission between interface 705 and the touch panel and signal transmissions to and from external systems or peripherals via bus 704.
  • the main processor 701 incorporates a digital signal processor (DSP) or field programmable gate array (FPGA).
  • DSP digital signal processor
  • FPGA field programmable gate array
  • the bus 704 enables the main processor 701 to communicate with another system or device.
  • the other system or device can It is a display system that calculates a product or works in conjunction with the touch screen 301.
  • the signal sent from the touch panel to control device 307 via interface 705 is the analog current signal generated by image sensor 304. It should be understood that the analog current signal can be converted to an analog or digital voltage signal by other circuitry disposed between the touch panel and control device 307 or by circuitry of the main processor 701.
  • the wake-up device 306 is connected to the interface 705, in order to avoid the touch panel through the interface 705
  • the signals transmitted between the control device 307 and the control device 307 are adversely affected, and the wake-up device 306 is configured to have a high input impedance.
  • the main processor 701 transitions from the sleep mode to the run mode, returning to normal operation.
  • Fig. 11 shows another example of the control device 307 in the above embodiment.
  • the control device 307 includes an I/O controller 706 that is coupled to the main processor 701 via a bus 707.
  • the I/O controller 706 in this example acts as a bus controller for managing I/O signal transmissions between the bus 704 and external systems or devices. Since the I/O controller 706 is used to manage signal transmission via a high speed interface such as a serial interface or bus 704, the bus 704 can accommodate high speed serial bus architectures such as a USB (Universal Serial Bus) architecture. According to the current USB specification, the I/O controller 706 can manage the transmission of signals over the serial bus 704 using only one IRQ (interrupt), regardless of the number of devices used.
  • IRQ Interrupt
  • bus 704 provides plug-and-play connectivity in accordance with the USB specification configuration.
  • the control device 307 can be inserted and removed from different ports at any time without adverse consequences associated with the connection.
  • USB data transfer rates can reach 480 megabits per second (such as USB2.0).
  • the wake-up device 306 is connected to the I/O controller 801 and the interface 705.
  • the wake-up signal generated by the wake-up device 306 is transmitted to the I/O controller 706.
  • the I/O controller 706 shifts from the sleep mode to the operation mode in response to the wake-up signal.
  • the I/O controller 706 determines if it is necessary to activate other components in the control device 307, such as the main processor 701. If it is determined that other components need to be activated, the I/O controller 706 transmits a second wake-up signal to the main processor 701 via the bus 707. In other embodiments, the wake-up signal from wake-up device 306 is sent to I/O controller 706 and main processor 701 (via interface 705).
  • the touch system of the above embodiment can significantly reduce the power consumption of touch input devices including touch panels, particularly the power consumption of portable and handheld touch input systems.
  • each of the main processor 701 and the I/O controller 706 requires several hundred amps of current during normal operation. Since the touch system includes the awake device 306, the main processor 701 and the I/O controller 706 Most of the circuitry will be turned off in sleep mode, reducing the power required to a fraction of the total runtime. In addition, the wake-up device 306 requires only a small amount of power during operation.
  • the wake-up device 306 can be implemented to draw a current of less than a few hundred microamps (eg, less than 500 uA) from the 5v DC power source.
  • a few hundred microamps eg, less than 500 uA
  • the overall current draw will be less than 10011 A.
  • the wake-up device 306, the control device 307, and the touch screen 301 are separately provided, the wake-up device 306, the control device 307, and the touch screen 301 can also be integrated into one body. In this case, the wake-up device 306 is only used to acquire a signal generated by the sensor 305 indicating the deformation of the touch panel or bezel without affecting the signal transmitted between the touch panel and the control device 307.
  • FIG 12 is a block diagram showing the structure of a touch system in accordance with another embodiment of the present invention.
  • the present embodiment will be described in detail below with reference to the drawings, in which the same portions as those of the previous embodiment are appropriately omitted.
  • the touch system of the present embodiment shown in Fig. 12 includes a touch screen 301, a sensor 305, a wake-up device 306, and a control device 307.
  • the touch screen 301 is an infrared touch screen.
  • the infrared touch screen includes an infrared transmitting tube array 1201, an infrared receiving tube array 1202, a touch panel 1204, and a bezel 1203.
  • the touch panel 1204 is mounted on the bezel 1203, as shown in FIG.
  • the infrared emitter array 1201 and the infrared receiver array 1202 are located in four sides of the bezel 1203, and each of the infrared emitter arrays 1201 is opposed to an infrared receiving tube array 1202 to form an infrared mesh grid.
  • there are four sensors 305 which are respectively mounted on the four corners of the lower surface of the bezel 1203 to detect the deformation of the bezel 1203.
  • Control device 307 is coupled to infrared transmit tube array 1201, infrared receive tube array 1202, sensor 305, and wake-up device 306, respectively.
  • the wake-up device 306, the control device 307, and the bezel 1203 are provided separately from each other, but the wake-up device 306, the control device 307, and the bezel 1203 may be integrally provided.
  • the senor 305 can also be mounted at other locations on the bezel 1203, for example, on the lower or side of the bezel 1203.
  • Figure 14 shows a schematic view of the above three mounting arrangements of the sensor 305 mounted on the bezel 1203.
  • the touch screen of the embodiment of the present invention may also be a resistive touch screen, a capacitive touch, Projected capacitive touch screen, surface acoustic wave touch screen, curved wave touch ⁇ and other touch screens.
  • the touch panel described above is employed as the touch screen, the mounting position of the sensor, the wake-up device, and the like are substantially the same as in the previous embodiment.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Position Input By Displaying (AREA)

Description

一种唤醒触摸系统的方法以^摸系统 技术领域
本发明涉及光电检测技术领域， 尤其涉及一种在包含触摸屏的触摸系 统中唤醒触摸系统的方法以 摸系统。 背景技术
采用触摸输入功能的电子显示器被应用于多种装置， 包括便携式及手 持式装置。 一种典型的触摸屏被安装在电子显示器上。 这种触摸屏可为电 容式触摸屏、 电阻式触摸屏、 红外式触摸屏、 表面声波式触摸屏、 摄像头 式触摸屏。 人们对便携式和手持式电子装置关注程度的增加导致此类装置 的激增。 这种关注也引发了人们对便携式和手持式装置使用寿命的关注， 尤其是对功率需求方面。 采用降低触摸输入装置中功耗的技术可有利地延 长便携式电子装置的使用寿命， 并且便携式电子装置在再充电或更换电池 的情况下也可使用触摸输入功能。 发明内容
本发明的目的在于提供一种唤醒触摸系统的方法和一种具有使用寿命 长、 功耗小的触摸系统， 以克服现有技术中的不足之处。
根据本发明的一个方面， 提供一种唤醒触摸系统的方法， 包括： 当在所述触摸系统的触摸屏上发生触摸操作时， 检测所述触摸屏的触 摸面板或边框的形变；
根据所检测的所述触摸面板或边框的形变确定所述触摸操作是有效触 摸操作还是误触摸操作；
当所述触摸操作是有效触摸操作时， 响应于所述有效触摸操作， 产生 唤醒信号； 以及
向所述触摸系统的控制装置发送所述唤醒信号， 以使所述控制装置从 睡眠状态转换到运行状态。 根据本发明的另一个方面， 提供一种触摸系统， 包括：
触
传感器， 其在所述触摸屏上有触摸操作时检测所述触摸屏的触摸面板 或边框的形变；
唤醒装置， 其根据所述传感器所检测的所述触摸面板或边框的形变确 定所述触摸操作是有效触摸操作还是误触摸操作， 在所述触摸操作是有效 触摸操作时， 响应于所述有效触摸操作， 生成唤醒信号， 并所述唤醒信号 发送到控制装置； 以及
控制装置， 其根据来做所述唤醒装置的所述唤醒信号， 从睡眠状态转 换到运行状态。 附图说明
图 1是根据本发明的一个实施例的唤醒触摸系统的方法的流程图； 图 2是图 1所示的实施例的一个具体例子的流程图；
图 3是图 1所示的实施例的另一个具体例子的流程图；
图 4是根据本发明的一个实施例的触摸系统的结构示意图；
图 5是图 4所示实施例的触摸系统的一个变形例的结构示意图； 图 6是图 4所示实施例的触摸系统的另一个变形例的结构示意图； 图 7是图 4至图 6所示实施例的触摸系统中传感器在触摸面板上的安 装示意图；
图 8是图 4至图 6所示的实施例中的唤醒装置的一个例子的结构示意 图；
图 9是图 4至图 6所示的实施例中的唤醒装置的另一个例子的结构示 意图；
图 10是图 4至图 6所示的实施例中的控制装置的一个例子的示意图； 图 11是图 4至图 6所示的实施例中的控制装置的另一个例子的示意 图；
图 12是根据本发明的另一个实施例的触摸系统的结构示意图； 图 13是图 12所示实施例的触摸系统中触摸屏的剖视图；
图 14是图 12所示实施例的触摸系统中传感器在边框上的安装示意图。 具体实施方式
下面结合说明书附图和具体实施方式对本发明作进一步的描述。
在本发明的各个实施例的上下文中， 术语 "有效触摸" 是指希望被解 释为触摸输入的可被检测到的触摸面板或边框形变、 引起这种触摸面板形 或边框变的事件、 以及由于传感器接收到这些触摸面板形变或边框而产生 的信号。 术语 "误触摸" 是指不希望被解释为触摸输入的可被检测到的触 摸面板形变或边框、 引起这种触摸面板形变或边框的事件、 以及由于传感 器接收到这些触摸面板形变或边框而产生的信号。 例如， 误触摸包括由于 外界温度或者气压的变化、 飞虫碰到触摸面板、 雨滴到触摸面板而引 摸系统中的触摸面板形变而产生的信号。 本发明所述的触摸系统是指包含 触摸屏的系统。 该触摸系统如果在预设的时间内没有有效的触摸操作， 就 会 睡眠状态。
图 1是根据本发明的一个实施例的唤醒触摸系统的方法的流程图。 下 面结合附图， 对本实施例进行详细描述。
如图 1所示， 在步骤 101， 检测触摸系统中触摸屏的触摸面板或边框 的形变。 在该步骤中， 当在触摸屏上发生触摸操作时， 检测由该触摸操作 引起的触摸面板或边框的形变。 当触摸屏上有触摸操作时， 该触摸操作将 导致触摸面板或边框发生一定程度的形变。 触摸面板或边框的形变大小与 触摸屏所受到的触摸操作有关。 例如， 当飞虫碰到触摸屏时， 该触摸操作 可能只引起触摸面板或边框的较小形变。 当成年人有意识 触摸屏进行 触摸操作时引起的触摸面板或边框的形变则较大。 在该步骤中， 可利用传 感器检测触摸面板或边框的形变。传感器可以例如是应变片、光纤传感器、 压电元件及其任意组合。 传感器一般可安装在触摸面板或边框上， 其详情 在后面说明。 传感器所检测的触摸面板或边框的形变一般可用电压信号、 电流信号、 模拟信号、 数字信号中的一种表示。 接着， 在步骤 105， 根据在步骤 101中检测的触摸面板或边框的形变， 确定触摸操作是有效触摸操作还是误触摸操作。 在本实施例中， 可通过比 较触摸面板或边框的形变与预定阈值来进行上述确定。 具体地， 将通过步 骤 101检测获得的表明触摸面板或边框的形变的形变信息， 例如， 电压信 号、 电流信号等模拟信号或数字信号， 与预定阈值进行比较。 如果形变信 息大于或等于上述预定阈值， 则确定该触摸操作是有效触摸操作， 执行步 骤 110。 如果形变信息小于预定阈值， 则确定该触摸操作是误触摸操作， 执行步骤 115。
在步骤 110， 响应于有效触摸操作， 产生唤醒信号， 用于将触摸系统 的控制装置从睡眠状态转换到运行状态。
然后， 在步骤 120, 将在步骤 110所产生的唤醒信号发送到控制装置， 以使控制装置从睡眠状态转换到运行状态。
在步骤 115， 由于触摸操作被确定为误触摸操作， 因此， 不产生唤醒 信号， 从而不进行任何处理。
图 2是图 1所示的实施例的一个具体例子的 图。 下面结合附图， 对该具体例子进行详细描述， 其中与前面实施例相同的部分， 适当省略其 说明。
在图 2所示的具体例子中， 对触摸面板的形变进行检测。
具体地， 在步骤 201， 当在触摸屏上发生触摸操作时， 检测触摸面板 的形变。 在该步骤中， 触摸面板的形变可通过检测触摸面板在与触摸面板 平行的方向上的形变f*测。 当然， 本领域的普通技术人员能够理解， 也 可以检测触摸面板在其它方向上的形变。 同样， 所检测的形变可用电压信 号、 电流信号等表示。
接着， 在步骤 205， 将表明所检测的触摸面板的形变的形变信息与预 定阈值进行比较， 并在步骤 210中， 确定触摸操作是有效触摸操作还是误 触摸操作。 当触摸面板的形变信息大于或等于预定阈值时， 则确定该触摸 操作是有效触摸操作， 执行步骤 215。 当触摸面板的形变信息小于预定阈 值时， 则确定该触摸操作是误触摸操作， 执行步骤 220。 在步骤 215中， 产生唤醒信号， 用于将控制装置从睡眠状态转换到运 行状态。 然后， 在步骤 225中， 将所产生的唤醒信号发送到控制装置。
在一个实施例中， 唤醒信号首先被发送到控制装置的总线控制器， 以 使总线控制器从睡眠状态转换到运行状态。 接着， 总线控制器确定是否需 要唤醒控制装置的主处理器， 当确定为需要唤醒主处理器时， 总线控制器 向主处理器发送第二唤醒信号，以使主处理器从睡眠状态转换到运行状态。 在另一个实施例中， 唤醒信号可以被同时发送到控制装置的总线控制器和 主处理器， 以使它们能够从睡眠状态转换到运行状态。
在步骤 220中， 由于在步骤 210中对触摸屏的触摸操作被确定为误触 摸操作， 因此， 不产生唤醒信号， 从而不对此次触摸操作进行任何处理。
图 3示出了图 1所示的实施例的另一个具体例子的流程图。 该具体例 子与图 2所示的具体例子基本相同， 区别仅在于： 在图 3所示的具体例子 中， 对边框的形变进行检测。 也就是说， 在步骤 1301， 当在触摸屏上发生 触摸操作时， 检测边框的形变， 例如， 检测边框在与边框平行的方向上的 形变， 或者检测边框在其它方向上的形变。 其余的步骤 1305-1325与图 2 中的步骤 205-225相同， 此处省略其说明。
通过以上描述可以看出， 上述实施例的方法检测由触摸操作引起的触 摸面板或边框的形变， 根据所检测的触摸面板或边框的形变确认触摸操作 是有效触摸操作还是误触摸操作， 并在有效触摸操作的情况下产生唤醒信 号， 以使控制装置被唤醒， 而在误触摸操作的情况下， 不进行任何处理， 从而通过唤醒信号来唤醒触摸系统， 有效地屏蔽误触摸操作。 另外， 由于 间内没有操作的情况下 睡眠状态， 因
Figure imgf000007_0001
图 4是才艮据本发明的一个实施例的触摸系统的结构示意图。 下面结合 附图， 对本实施例进行详细描述。
如图 4所示， 触摸系统包括： 触摸屏 301; 传感器 305， 其在触摸屏上 有触摸操作时检测触摸屏 301的触摸面板或边框的形变； 唤醒装置 306， 其根据传感器 305所检测的触摸面板或边框的形变确定该触摸操作是有效 触摸操作还是误触摸操作， 并在触摸操作是有效触摸操作时， 响应于该有 效触摸操作， 生成唤醒信号， 并将唤醒信号发送到控制装置 307; 以及控 制装置 307， 其根据来自唤醒装置 306的唤醒信号， 从睡眠状态转换到运 行状态。
在本实施例中， 触摸屏 301是光学触摸屏， 其可利用图像传感器并使 用三角测量法对触摸物进行定位。 该光学触摸屏包括作为光源的红外光源 303、回归反射条 302、两个作为图像传感器的红外摄像头 304和触摸面板。 在本实施例中， 红外摄像头 304被安装在触摸面板的两个相邻的拐角处， 红外光源 303安装在红外摄像头 304的附近， 回归反射条 302安装在触摸 面板的三个边缘上， 用于将红外光源 303发出的光反射回红外光源 303附 近， 以便向红外才聂像头 304提供捕获触摸物的图像信息所需的光照。
在本实施例的触摸系统中， 包含四个传感器 305， 分别安装在触摸面 板的触摸面的两个边缘上， 用于检测触摸面板的形变。 传感器 305可以是 应变片、 光纤传感器、 压电元件中的一个或几个。 在本实施例中， 传感器 305 是光纤传感器， 因为光纤传感器具有高度的灵敏性， 能够很好地检测 触摸面板的形变。
为了使传感器 305能够很好地检测触摸面板 301的形变， 本实施例使 用了四个传感器 305。 当然， 本领域的普通技术人员能够理解， 也可以使 用其它数量的传感器 305， 例如一个传感器。 当然， 如果传感器 305的数 量较少， 则检测效果会较差。
虽然在本实施例中传感器 305被安装在触摸面板的触摸面上以检测触 摸屏的形变， 但传感器 305也可以安装在触摸面板的其它位置上。
例如， 图 5和图 6分别示出了图 4所示实施例的触摸系统的变形例， 它们与图 4的区别在于传感器 305在触摸面板 301上的安装位置不相同。 在图 5所示的变形例中， 传感器 305被安装在触摸面板的触摸面的对面， 即在触摸面板的下面， 为了表示传感器 305安装在触摸面板的下面， 传感 器 305用虚线进行表示。 在另一个变形例中， 如图 6所示， 传感器 305被 安装在触摸面板的侧面。 此外， 传感器 305还可以安装在触摸面板的拐角 处，其具体情况将在后面参照图 12描述。 图 7给出了传感器 305在触摸面 板上安装的上述三种安装方式的示意图。
在本实施例中， 如果触摸屏 301还包括边框， 则传感器 305还可以检 测边框的形变。 在这种情况下， 传感器 305被安装在边框上， 例如在边框 的上表面、 下表面或侧面。
传感器 305的输出 （触摸面板或边框的形变信息）被提供给唤醒装置 306， 以确定触摸操作是有效触摸操作还是误触摸操作。 图 8示出了上述实 施例中的唤醒装置 306的一个例子的结构示意图。 如图 8所示， 唤醒装置 306包括信号放大电路 601、 低通滤波器 602、 峰值整形电路 603、 比较电 路 604和阈值产生单元 605。 当唤醒装置 306从传感器 305接收表明触摸 面板或边框的形变的信号（例如电压信号） 时， 首先由信号放大电路 601 对该信号进行放大。 信号放大电路 900的放大倍数可根据实际情况进行调 整，通常在 30倍左右。通过信号放大电路 900放大的信号进入低通滤波器 901 , 以将比有效信号的频率高的信号滤除。 通常， 有效信号小于 1KHZ。 然后， 有效信号通过峰值整形电路 902进行整形， 并提供给比较电路 604。 在比较电路 604中， 经过峰值整形后的有效信号与阈值产生单元 605所产 生的阈值（例如阈值电压信号）进行比较。 如果经过峰值整形后的有效信 号大于或等于阀值， 则传感器 305输出的信号是表示有效触摸操作的有效 触摸信号， 此时， 比较电路 604产生唤醒信号， 并输出该唤醒信号， 通常 唤醒信号为低电平信号。 如果经过峰值整形后的信号小于阈值， 则传感器 305输出的信号是表示误触摸操作的误触摸信号， 此时， 比较电路 604不 产生唤醒信号。 在该例子中， 通过调节阈值， 可以调节整个唤醒装置 306 的灵敏度。
图 9示出了上述实施例中的唤醒装置 306的另一个例子的结构示意图。 如图 9所示， 唤醒装置 306包括信号放大电路 601、 低通滤波器 602、 A/D 转换器 606和处理器 607。 信号放大电路 601对从传感器 305输出的表明 触摸面板或边框的形变的信号进行放大， 以方便随后的处理。 信号放大电 路 601的放大倍数可根据实际情况进行调整，通常在 30倍左右。经由信号 放大电路 601放大的信号进入低通滤波器 602中， 以将有效信号之外的高 频信号滤除， 有效信号通常小于 1KHZ。 然后， A/D转换器 606将低通滤 波器 901输出的模拟信号转变成数字信号， 并提供给处理器 607。 处理器 607 判断数字化的信号是有效触摸信号还是误触摸信号， 如果是有效触摸 信号， 则处理器输出唤醒信号。 另外， 处理器 607也可以通过波形识别来 判断来自传感器 305的信号是有效触摸信号还是误触摸信号。
控制装置 307与唤醒装置 306相连， 可接收来自唤醒装置 306的唤醒 信号， 并基于该唤醒信号， 从睡眠状态转换到运行状态。 另外， 控制装置 307还与触摸面板相连， 可接收来自触摸面板的信号， 以计算触摸物的位 置。
图 10示出了上述实施例中的控制装置 307的一个例子。 为简化起见， 图 10仅示出了相关的元件。如图 10所示，控制装置 307包括主处理器 701、 总线 704和接口 705。控制装置 307可通过接口 705与触摸面板进行通信。 尽管在特定设计中可以根据需要将控制装置 307的一些或全部元件设置在 触摸屏 301的外部， 但是控制装置 307也可以与触摸屏 301集成为一体。 另外， 唤醒装置 306也通过接口 705与控制装置 307中的主处理器 701连 接。
在上述的控制装置 307中，主处理器 701负责计算触摸物的触摸位置。 主处理器 701还管理经由接口 705与触摸面板之间的信号传输和经由总线 704与外部系统或外设之间的信号传输。 优选地， 主处理器 701结合有数 字信号处理器（ DSP )或现场可编程门阵列（ FPGA )„ 总线 704使主处理 器 701能够与另一个系统或装置通信连接， 该另一个系统或装置可以是计 算积 4殳备或与触摸屏 301协同工作的显示系统。
典型地， 从触摸面板经由接口 705发送到控制装置 307的信号是图像 传感器 304所产生的模拟电流信号。 应当理解， 该模拟电流信号可以由设 置在触摸面板和控制装置 307之间的其它电路或由主处理器 701的电路转 换成模拟或数字电压信号。
唤醒装置 306与接口 705相连， 为了避免对通过接口 705在触摸面板 与控制装置 307之间传输的信号造成不利影响， 唤醒装置 306被构造为具 有高输入阻抗。
响应于接收到来自唤醒装置 306的唤醒信号， 主处理器 701从睡眠模 式转换成运行模式， 恢复正常运行。
图 11示出了上述实施例中的控制装置 307的另一个例子。在该例子中， 如图 11所示， 控制装置 307包括 I/O控制器 706， 其通过总线 707与主处 理器 701相连。 该例子中的 I/O控制器 706作为总线控制器， 用于管理通 过总线 704与外部系统或装置之间的 I/O信号传输。 由于 I/O控制器 706 用于管理经由诸如串行接口或总线 704的高速接口进行的信号传输，因此， 总线 704可以适应高速串行总线架构， 如 USB (通用串行总线）架构。 根 据现在的 USB规范， 无论使用多少个装置， I/O控制器 706都可仅用一个 IRQ (中断）来管理通过串行总线 704进行的信号传输。 另外， 根据 USB 规范配置， 总线 704提供了即插即用连接能力。 这样， 控制装置 307可以 在任何时刻从不同端口插入和拔出， 而不会出现与连接相关的不利结果。 目前， USB数据传输速率可达每秒 480兆比特（如 USB2.0 )。
如图 11所示，唤醒装置 306与 I/O控制器 801和接口 705相连。这样， 唤醒装置 306所产生的唤醒信号被传输到 I/O控制器 706。此时， I/O控制 器 706响应于该唤醒信号而从睡眠模式转换到运行模式。 然后， I/O控制 器 706判断是否需要激活控制装置 307中的其它部件， 例如主处理器 701。 如果判断为需要激活其它部件， 则 I/O控制器 706通过总线 707将第二唤 醒信号发送给主处理器 701。 在其它实施例中， 来自唤醒装置 306的唤醒 信号被发送到 I/O控制器 706和主处理器 701 (通过接口 705)。
上述实施例的触摸系统能够明显地减小包括触摸面板的触摸输入装置 的功耗，尤其是便携式和手持式触摸输入系统的功耗。例如，主处理器 701 和 I/O控制器 706的每一个在正常工作时需要几百亳安的电流， 由于触摸 系统中包括唤醒装置 306， 因此， 主处理器 701和 I/O控制器 706大部分 电路将在睡眠模式下关闭， 从而可将所需要的功率减小到全部运行时的一 小部分。 另外， 唤醒装置 306在运行时也只需要较小的功率。 例如， 在触摸系 统的控制装置 307处于睡眠模式时，唤醒装置 306可被实现为从 5v直流电 源提取小于几百微安电流（例如， 小于 500uA )的电流。 这样， 当唤醒装 置 306工作而控制装置 307处于睡眠模式时，整体电流提取会小于 10011 A。
在图 4的实施例中， 虽然唤醒装置 306、 控制装置 307和触摸屏 301 分开设置， 但唤醒装置 306、 控制装置 307和触摸屏 301也可以集成为一 体。 在这种情况下， 唤醒装置 306仅用于获取传感器 305所产生的表示触 摸面板或边框的形变的信号， 而不会影响在触摸面板和控制装置 307之间 传输的信号。
图 12是根据本发明的另一个实施例的触摸系统的结构示意图。下面结 合附图， 对本实施例进行详细说明， 其中与前面实施例相同的部分， 适当 省略其说明。
与图 4所示的实施例类似，图 12所示的本实施例的触摸系统包括触摸 屏 301、 传感器 305、 唤醒装置 306以及控制装置 307。 但在本实施例中， 触摸屏 301是红外触摸屏。如图 12所示， 红外触摸屏包括红外发射管阵列 1201、 红外接收管阵列 1202、 触摸面板 1204和边框 1203, 其中触摸面板 1204安装在边框 1203上， 如图 13所示。 红外发射管阵列 1201和红外接 收管阵列 1202位于边框 1203的四个边中， 每一个红外发射管阵列 1201 都与一个红外接收管阵列 1202相对，以形成红外网状栅格。在本实施例中， 有四个传感器 305， 分别安装在边框 1203的下表面的四个拐角上， 以检测 边框 1203的形变。 控制装置 307分别与红外发射管阵列 1201、 红外接收 管阵列 1202、传感器 305和唤醒装置 306相连。在图 12中，唤醒装置 306、 控制装置 307与边框 1203相互分离地设置， 但也可以将唤醒装置 306、 控 制装置 307与边框 1203一体化地设置。
另夕卜， 传感器 305也可以安装在边框 1203的其它位置， 例如， 在边框 1203的下表面或侧面。 图 14给出了传感器 305在边框 1203上安装的上述 三种安装方式的示意图。
另外， 本发明的实施例的触摸屏还可以是电阻触摸屏、 电容触 、 投射式电容触摸屏、 表面声波触摸屏、 弯曲波触 ^^等其它触摸屏。 当采 用上述触摸屏作为触摸屏时， 传感器的安装位置、 唤醒装置等基本与前面 的实施例相同。
本发明并不限于具体实施方式中所述的实施例。 本领域技术人员根据 本发明的技术方案得出的其它实施方式， 同样属于本发明的范围。

Claims

权利要求
1. 一种唤醒触摸系统的方法， 包括：
当在所述触摸系统的触摸屏上发生触摸操作时， 检测所述触摸屏的触 摸面板或边框的形变；
根据所检测的所述触摸面板或边框的形变确定所述触摸操作是有效触 摸操作还是误触摸操作；
当所述触摸操作是有效触摸操作时， 响应于所述有效触摸操作， 产生 唤醒信号； 以及
向所述触摸系统的控制装置发送所述唤醒信号， 以使所述控制装置从 睡眠状态转换到运行状态。
2. 根据权利要求 1 所述的唤醒触摸系统的方法， 其中， 所述检测所 述触摸屏的触摸面板或边框的形变的步骤包括：
检测所述触摸面板在与所述触摸面板平行的方向上的形变； 或者 检测所述边框在与所述边框平行的方向上的形变。
3. 根据权利要求 1 所述的唤醒触摸系统的方法， 其中， 所述根据所 检测的所述触摸面板或边框的形变确定所述触摸操作是有效触摸操作还是 误触摸操作的步骤包括：
将表明所述形变的形变信息与预定阈值进行比较；
如果所述形变信息大于或等于所述预定阈值， 则确定所述触摸操作是 有效触摸操作； 以及
如果所述形变信息小于所述预定阈值， 则确定所述触摸操作是误触摸 操作。
4. 根据权利要求 1 所述的唤醒触摸系统的方法， 其中， 所述控制装 置包括总线控制器和主处理器；
其中， 所述向所述触摸系统的控制装置发送所述唤醒信号， 以使所述 控制装置从睡眠状态转换到运行状态的步骤包括：
向所述总线控制器发送所述唤醒信号， 以使所述总线控制器从睡眠状 态转换到运行状态； 所述总线控制器确定是否需要唤醒所述主处理器； 以及
当确定为需要唤醒所述主处理器时， 向所述主处理器发送第二唤醒信 号， 以使所述主处理器从睡眠状态转换到运行状态。
5. 一种触摸系统， 包括：
触
传感器， 其在所述触摸屏上有触摸操作时检测所述触摸屏的触摸面板 或边框的形变；
唤醒装置， 其根据所述传感器所检测的所述触摸面板或边框的形变确 定所述触摸操作是有效触摸操作还是误触摸操作， 并在所述触摸操作是有 效触摸操作时， 响应于所述有效触摸操作， 生成唤醒信号， 并将所述唤醒 信号发送到控制装置； 以及
控制装置， 其根据来自所述唤醒装置的所述唤醒信号， 从睡眠状态转 换到运行状态。
6. 根据权利要求 5 所述的触摸系统， 其中， 所述传感器是应变片、 光纤传感器、 压电元件中的一个或多个。
7. 根据权利要求 5 所述的触摸系统， 其中， 所述传感器安装在所述 触摸面板的触摸面上或者所述触摸面的对面。
8. 根据权利要求 7 所述的触摸系统， 其中， 所述传感器安装在所述 触摸面板的拐角处。
9. 根据权利要求 5 所述的触摸系统， 其中， 所述传感器安装在所述 边框的上表面或下表面。
10.根据权利要求 5 所述的触摸系统， 其中， 所述传感器安装在所述 触摸面板或所述边框的侧面。
11.根据权利要求 5至 10任意一项所述的触摸系统， 其中， 所述触摸 屏是电阻触摸屏、 电容触摸屏、 投射式电容触摸屏、 红外触摸屏、 光学触 摸屏、 表面声波触摸展、 弯曲波触摸展中的一种。
PCT/CN2010/077404 2009-09-28 2010-09-28 一种唤醒触摸系统的方法以及触摸系统 WO2011035737A1 (zh)

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