WO2011030984A1 - Système et procédé d'entrée d'informations - Google Patents

Système et procédé d'entrée d'informations Download PDF

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Publication number
WO2011030984A1
WO2011030984A1 PCT/KR2010/001434 KR2010001434W WO2011030984A1 WO 2011030984 A1 WO2011030984 A1 WO 2011030984A1 KR 2010001434 W KR2010001434 W KR 2010001434W WO 2011030984 A1 WO2011030984 A1 WO 2011030984A1
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WIPO (PCT)
Prior art keywords
signal
information input
ultrasonic
synchronization signal
electromagnetic wave
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PCT/KR2010/001434
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English (en)
Korean (ko)
Inventor
고도영
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(주)옴니오
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Publication of WO2011030984A1 publication Critical patent/WO2011030984A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • G06F3/03545—Pens or stylus
    • 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
    • G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
    • G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
    • 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
    • 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
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves

Definitions

  • the present invention relates to an information input system and method, and more particularly to an information input system and method using electromagnetic induction and ultrasonic signals.
  • a resistive method is formed by combining two sheets of resistive components separated by a spacer and arranged to be in contact with each other by pressure, and capacitive sensing a changing position of the induced capacitance value.
  • Methods an electromagnetic induction method for detecting a pen position from a signal induced by the pen, and an ultrasonic method for detecting a change in a position where a sound is generated using a speed difference between sound and light.
  • the resistive film method detects a change in the amount of current generated by the pressure pressed in a state in which a DC voltage is applied, and the capacitive method senses a position using capacitance coupling in a state in which an AC voltage is applied. do.
  • the electromagnetic induction method detects and detects a resonance frequency resonating with an induced voltage in a selected position while a magnetic field is applied.
  • the electromagnetic induction method determines the position of the pen by signals induced in two sets of antenna coils orthogonally arranged according to the resonant frequency of the pen.
  • Ultrasonic method generates very high speed infrared signal and very low speed ultrasonic signal from electronic pen and calculates how late the ultrasonic signal arrives from infrared signal received from receiving circuit. The coordinates were calculated from the above separation distance to enable real-time location tracking of the pen.
  • the electromagnetic induction method operates only at a certain height above a special pad on which a coil of orthogonal shape is formed, and has a disadvantage in that jitter or error is generated by surrounding electromagnetic waves.
  • a circuit or a metal material is mounted on the pad to achieve electromagnetic induction, an error occurs, and a shield plate for preventing interference with other tablets or electronic devices has a disadvantage in that the back of the pad is required.
  • the ultrasonic method can operate in the air, so no special pad is required, but a separate power source for generating infrared and ultrasonic signals is required from the pen, and the infrared signal used here operates due to interference from light such as an external fluorescent lamp.
  • the disadvantage is that errors or jitter occur.
  • the above infrared signal has a disadvantage of generating mutual interference between devices when two or more ultrasonic systems are adjacent to each other.
  • the ultrasonic information input device uses the difference in the transmission time of light and sound, and calculates the position by calculating the distance from the time from the ultrasonic signal generator to the ultrasonic signal receiver. do.
  • the light reaches the receiver in a moment, but the sound has a transmission time delay of about 340m per second.
  • the transfer time of the ultrasonic signal from the ultrasonic signal generator to the receiver it is used to generate the ultrasonic signal. This is the principle of knowing the distance to wealth.
  • invisible infrared light is used as light and ultrasonic signals inaudible to sound are used.
  • the electronic pen of the ultrasonic tablet is configured to include a circuit for generating an infrared signal serving as a reference signal and a circuit for generating an ultrasonic signal together with the infrared.
  • a signal generator 10 used in a conventional information input device is implemented in the form of a pen, a power supply unit 18 for supplying power to the pen 10, and an infrared ray for generating an infrared signal as a reference signal.
  • the ultrasonic wave generation sensor 12 is installed to surround the outer circumferential surface of the pen core portion 11 so as to allow the pen core to flow while securing a space in the form of a cylinder, and converts the electrical energy applied from the ultrasonic signal generator 15 into vibration. Since it is necessary to generate an ultrasonic wave, it is preferable to implement it as a piezoelectric element such as a piezo film.
  • the power supply unit 18 supplies power to the ultrasonic signal generator 15, the infrared signal generator 16, and the controller 17.
  • the controller 17 generates a control signal for generating an ultrasonic signal and an infrared signal periodically every predetermined time period.
  • the ultrasonic signal generator 15 generates a signal for driving the ultrasonic wave sensor 12
  • the infrared signal generator 16 generates a signal for driving the infrared light emitting sensor 13.
  • Ultrasonic signals and infrared signals generated at the same time are received by the ultrasonic receiving sensors 31 and 32 and the infrared receiving sensor 33 included in the receiving circuit 30 of FIG. 2, but the ultrasonic signals are separated from the pen 10. Depending on the time delay is received.
  • FIG. 2 is a block diagram of a receiving circuit showing a concept for measuring the position of the pen 10 in the conventional ultrasonic tablet.
  • the receiver 30 includes an infrared signal receiving sensor 33 for receiving an infrared signal and a plurality of ultrasonic signal receiving sensors 31 and 32 for receiving an ultrasonic signal.
  • the ultrasonic signal receiving sensors 31 and 32 are spaced apart by a predetermined distance, and the separation distance between two ultrasonic signal receiving sensors is denoted by c.
  • FIG. 3 is a timing diagram illustrating a correlation between signals received by the infrared signal receiving sensor 33 and the ultrasonic signal receiving sensors 31 and 32 included in the receiving unit 30.
  • the infrared signal and the ultrasonic signal simultaneously generated by the pen 10 are received by the infrared signal receiving sensor 33 and the ultrasonic signal receiving sensors 31 and 32 included in the receiving unit 30,
  • the waveform is shown in FIG. 3.
  • the ultrasonic signal received by one ultrasonic signal receiving sensor 31 is received after a time Ta from the received infrared signal, and the ultrasonic signal received by another ultrasonic signal receiving sensor 32 spaced by c is received. It is received after the time Tb from the infrared signal.
  • Ta and Tb values change according to the movement of the pen 10, but the distance value can be detected in real time from the sound transmission time.
  • the (x, y) coordinates of the pen 10 using c, the distance value between the detected distances a and b and the predefined ultrasonic signal receiving sensors 31 and 32, are calculated using Equation 1 below. You can get it.
  • the infrared signal which is a reference signal in Equation 1
  • the infrared signal is generated by the pen 10 and simultaneously received by the infrared signal receiving sensor 33, and distances a and b correspond to the time when the infrared signal is received.
  • the ultrasonic signal can be obtained by multiplying the sound speed by the difference between the times received by the left ultrasonic signal receiving sensor 31 and the right ultrasonic signal receiving sensor 32, respectively, and the distance c is a preset value, so that a, b, and c
  • the value may be applied to the equation to obtain (x, y) coordinates, and the user's handwriting, such as a character, may be input using these coordinate values at which the pen 10 moves.
  • the ultrasonic tablet has an electronic pen which simultaneously generates infrared and ultrasonic signals as reference signals and a sensor for receiving the signals, it is possible to implement a tablet function by measuring the position of the pen in real time on any surface or space. There is an advantage.
  • the present invention is to solve the problems described above, the technical problem to be achieved by the present invention, a signal generator of a non-power source capable of generating an ultrasonic signal without a separate power source and an information input system using the same; To provide a way.
  • Another object of the present invention is to provide an information input system and method that can generate information by generating only an ultrasonic signal without separately generating a reference signal that causes interference and malfunction in a signal generator.
  • the information input system of the present invention for solving the above problems, the signal generation device including a resonant circuit therein, using the induced voltage signal generated in the resonant circuit to generate an ultrasonic signal; And an information input device for generating electromagnetic waves to generate an induced voltage signal in the resonant circuit and transmitting the electromagnetic wave to the signal generator, and receiving the ultrasonic signal to measure the position of the signal generator to generate position information.
  • the information input device generates the electromagnetic wave including the synchronization signal at a predetermined time interval or at an arbitrary time interval
  • the signal generator detects the synchronization signal from the electromagnetic wave and ultrasonic waves at the time when the synchronization signal is detected. Can generate a signal.
  • the information input device is generated by modulating the phase of the electromagnetic wave at a predetermined time interval or at an arbitrary time interval, and the signal generator examines the phase of the induced voltage signal induced by the electromagnetic wave,
  • the ultrasonic signal may be generated to correspond to the time point at which the phase is modulated.
  • the information input device generates a synchronization signal at a predetermined time interval or a predetermined time interval to generate an electromagnetic wave including the synchronization signal, by using the time when the synchronization signal is generated and the time when the ultrasonic signal is received.
  • the position of the signal generator can be measured.
  • the information input device generates and modulates the phase of the electromagnetic wave at a predetermined time interval or at a predetermined time interval, and measures the position of the signal generator by using the time when the phase is modulated and the time when the ultrasonic signal is received. Can be.
  • the signal generator the resonance circuit for generating an induced voltage signal using electromagnetic waves;
  • a synchronization signal generator that detects a synchronization signal corresponding to a point in time at which the phase of the electromagnetic wave is modulated by examining the phase of the induced voltage signal;
  • An ultrasonic signal generator for generating an ultrasonic signal when the synchronization signal is input from the synchronization signal generator;
  • the sync signal generator may detect the sync signal by performing low band filtering on the induced voltage signal.
  • the information input device the antenna coil for generating the electromagnetic wave
  • a synchronization signal generator for generating a synchronization signal;
  • An antenna coil driver for modulating a phase of electromagnetic waves generated by the antenna coil unit when a synchronization signal is input from the synchronization signal generator;
  • Two or more ultrasonic sensors spaced apart from each other to receive the ultrasonic signals;
  • a position measuring unit configured to measure the position of the signal generator by using the time when the synchronization signal is generated and the time when the ultrasonic signal is respectively received by the ultrasonic sensor.
  • the antenna coil unit may be installed around a region where the position of the signal generator is measured, or a plurality of antenna coils may be installed inside or around the region where the position of the signal generator is measured.
  • the signal generator generates an electromagnetic wave including a synchronization signal together with the ultrasonic signal by using the resonance circuit, and the information input device detects the synchronization signal from the electromagnetic wave generated by the resonance circuit.
  • the position of the signal generator may be measured using the time at which the signal is detected and the time at which the ultrasonic signal is received.
  • the information input method of the present invention for solving the above problems, (a) the position information input device for generating an electromagnetic wave; (b) driving a signal generator to generate an induced voltage signal using the electromagnetic wave to generate an ultrasonic signal; And (c) generating the position information by receiving the ultrasonic signal and measuring the position of the signal generator.
  • the position information input device generates the electromagnetic wave including the synchronization signal at a predetermined time interval or a predetermined time interval
  • the signal generator is the induction voltage
  • the sync signal is detected from the signal, and an ultrasonic signal is generated to correspond to the time point at which the sync signal is detected.
  • the position information input device generates a time when the electromagnetic wave including the sync signal is generated. And the position information may be generated by measuring the position of the signal generator using the time at which the ultrasonic signal is received.
  • the position information input device generates the electromagnetic wave whose phase is modulated at a predetermined time interval or a predetermined time interval
  • the signal generator is the induced voltage signal
  • the ultrasonic wave signal is generated by irradiating the phase of the electromagnetic wave to correspond to the time point at which the phase of the electromagnetic wave is modulated.
  • the position information input device performs a time when the phase of the electromagnetic wave is modulated and a time when the ultrasonic signal is received.
  • the position information may be generated by measuring the position of the signal generator using the method.
  • the signal generating device generates an electromagnetic wave including the synchronization signal together with the ultrasonic signal at a predetermined time interval or a predetermined time interval
  • the information input device is The location information may be generated by detecting the synchronization signal from the electromagnetic wave generated by the signal generator, and measuring the position of the signal generator using the time when the synchronization signal is detected and the time when the ultrasonic signal is received. have.
  • the signal generator of the present invention by using a power source derived from the electromagnetic wave generated in the information input device to drive the signal generator and generates an ultrasonic signal, there is no need for a separate power supply signal generator Can be implemented. Therefore, the present invention can reduce the power supply replacement cost and provide an information input system which is inexpensive and has a simple circuit configuration.
  • the present invention modulates the phase of the electromagnetic wave in the information input device to transmit the synchronization signal to the signal generator, and the synchronization signal by detecting the phase modulation in the induced voltage signal induced to correspond to the phase-modulated electromagnetic wave in the signal generator Is detected to synchronize the signal generator with the information input device. Therefore, the infrared signal sensitive to the external environment is not used, and more reliable information input is possible.
  • the present invention can input information on a display without a pad including a plurality of orthogonal coil patterns formed in an orthogonal shape required for a general touch screen or tablet PC, thereby reducing the transmittance of the screen at a low cost, Tablet information can be input without any decrease in brightness or contrast.
  • 1 is a diagram illustrating a configuration of an input device using a conventional ultrasonic signal.
  • Figure 2 is a block diagram of a receiving circuit showing a concept for measuring the position of the pen in a conventional ultrasonic tablet.
  • FIG. 3 is a timing diagram illustrating a correlation between signals received by the infrared signal receiving sensor 33 and the ultrasonic signal receiving sensors 31 and 32 included in the receiving unit shown in FIG. 2.
  • FIG. 4 is a diagram showing the overall configuration of the information input system and the detailed configuration of the information input apparatus according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a configuration of a signal generator according to an exemplary embodiment of the present invention.
  • FIG. 6 is a diagram showing waveforms of signals generated periodically in an information input system, and timing of generation and reception of ultrasonic signals in one cycle.
  • FIG. 7 is a diagram illustrating in detail the configuration of the resonant circuit unit, the synchronization signal generator, and the rectifier shown in FIG.
  • FIG. 8 is a block diagram showing a configuration of a signal generator according to the second embodiment.
  • FIG. 9 is a block diagram showing the configuration of an information input apparatus according to a second preferred embodiment of the present invention.
  • FIG. 4 is a diagram illustrating the overall configuration of an information input system and a detailed configuration of an information input apparatus according to an exemplary embodiment of the present invention
  • FIG. 5 is a diagram illustrating a configuration of a signal generator according to an exemplary embodiment of the present invention.
  • 6 is a diagram showing waveforms of signals periodically generated in the information input system and timing of generation and reception of ultrasonic signals in one cycle.
  • the information input system of the present invention generates position information by measuring the position of the signal generator 20 using the signal generator 20 generating the ultrasonic signal and the ultrasonic signal, and generating the position information. And an information input device 50 for inputting the received position information.
  • the information input device 50 is an antenna coil unit 51, an antenna coil driver 52, an analog signal amplifier 54, a digital signal converter 55,
  • the position measuring unit 56, the synchronization signal generating unit 53, the external interface unit 57, and two or more ultrasonic sensors 58a and 58b installed spaced apart from each other by a predetermined distance are configured.
  • the position measuring unit 56, the synchronization signal generating unit 53, and the external interface unit 57 may be implemented by software installed in a personal computer, or may be implemented by a dedicated semiconductor chip.
  • the synchronization signal generator 53 generates a pulse train as shown in FIG. 6A, which periodically changes phase, and outputs the pulse train to the antenna coil driver 52 and the position measuring unit 56.
  • the synchronization signal generator 53 generates a synchronization signal by generating a wider pulse than other pulses within the same period at a predetermined time period as shown by reference numeral 610 of FIG. 6A.
  • the synchronization signal generator 53 may be implemented to arbitrarily change the time interval for generating the pulse train.
  • the antenna coil driver 52 converts the pulse string as shown in FIG. 6 (a) into an analog signal as shown in FIG. 6 (b) inputted from the synchronization signal generator 53 to convert the antenna coil 51 into an analog signal. Output through At this time, the antenna coil driver 52 modulates the phase of the analog signal at a time point 620 corresponding to the region 610 in which the synchronization signal is generated, and transmits the synchronization signal to the signal generator 20.
  • the antenna coil unit 51 is installed around the outer periphery of the area for measuring the position of the signal generator 20, that is, the area for inputting the position information, or in the vicinity of the adjacent area to generate electromagnetic waves.
  • the antenna coil unit 51 is installed around the display of the notebook computer, and the user moves the tablet while moving the signal generator 20 in the display internal area of the notebook computer.
  • Location information can be entered in the same way as a PC.
  • the user may install the antenna coil unit 51 in the outer frame region of the general monitor to input the position information while moving the signal generator 20 in the screen inner region of the monitor.
  • a plurality of antenna coil parts 51 may be provided in the area.
  • the information input device 50 transmits a synchronization signal by modulating the phase of the electromagnetic wave
  • the signal generator 20 detects the synchronization signal generated by the information input device 50 by checking the phase modulation in the induced voltage signal. And generate an ultrasonic signal immediately after the synchronization signal is detected or with a constant time difference.
  • the signal generator 20 rectifies the induced voltage signal to obtain a waveform as shown in FIG. 6 (d), and low-pass filters the waveform to obtain a waveform as shown in FIG. 6 (e).
  • the falling edge corresponding to the phase modulation time point is detected in the waveform to generate an ultrasonic signal as shown in FIG.
  • the signal generator 20 and the information input device 50 are synchronized with each other. Can be.
  • the two or more ultrasonic sensors 58a, 58b are installed to be spaced apart from each other by a predetermined distance, as shown in Figure 6 (g) and (f), respectively to receive the ultrasonic signal to the analog signal amplifier 54
  • the analog amplification unit 54 amplifies the received ultrasonic signal and outputs it to the digital signal converter 55.
  • the digital signal converter 55 converts the ultrasonic signal, which is an analog signal, into a digital signal, and then measures the position. Output to (56).
  • the position measuring unit 56 detects the time when the ultrasonic signal is received by each ultrasonic sensor from the digital signal input from the digital signal converter 55, and the time when the synchronization signal is generated and the ultrasonic signal are stored by each ultrasonic sensor 58a, The distance between the signal generator 20 and each of the ultrasonic sensors 58a and 58b is measured using the time difference A and B between the times received in 58b), and the signal generator 20 is performed in the same manner as in Equation 1 above. To generate location information.
  • the external interface unit 57 outputs the location information to an application program of a computer on which the information input system of the present invention is implemented using the location information, or outputs the location information to an external circuit or an electronic device connected to the information input system of the present invention. do.
  • the signal generator 20 resonates with electromagnetic waves generated by the antenna coil part 51 to generate an induced voltage signal 21.
  • a rectifier 22 for rectifying the induced voltage signal generated by the resonant circuit unit 21 and supplying operating power to the components of the signal generator 20, and the induced voltage signal generated by the resonant circuit unit 21.
  • the synchronous signal is detected by filtering and the synchronous signal generated by the synchronous signal generator 23 and the synchronous signal generator 23 which outputs the synchronous signal to the ultrasonic signal generator 15 to instruct the generation of the ultrasonic signal.
  • Ultrasonic signal generator 15 for generating a and ultrasonic signal generator 12 for generating an ultrasonic signal by the drive signal input from the ultrasonic signal generator 15.
  • the user may further include a pen core 11 including a stylus pen tip or an ink pen tip so that a user can directly write on paper.
  • FIG. 7 is a diagram showing in detail the configuration of the resonance circuit 21, the synchronization signal generator 23, and the rectifier 22 shown in FIG.
  • the induced voltage signal as shown in FIG. 6C is generated in the resonant circuit unit 21 by the electromagnetic wave generated by the antenna coil unit 51 to generate the synchronous signal generator 23 and the rectifier ( 22) respectively. Since the resonant circuit unit 21 basically includes a capacitor and a coil, and a configuration for generating other induction power sources can be changed, a detailed illustration is omitted.
  • the synchronous signal generator 23 rectifies the voltage signal induced using the diode 23-1 to obtain a signal as shown in FIG. 6 (d), and the low band filtering is performed by the low band filter 23-2. 6E, a signal as shown in FIG. 6E is obtained, a falling edge is detected, a synchronization signal is generated, and output to the ultrasonic signal generator 15.
  • FIG. 6E The synchronous signal generator 23 rectifies the voltage signal induced using the diode 23-1 to obtain a signal as shown in FIG. 6 (d), and the low band filtering is performed by the low band filter 23-2. 6E, a signal as shown in FIG. 6E is obtained, a falling edge is detected, a synchronization signal is generated, and output to the ultrasonic signal generator 15.
  • the rectifier 22 rectifies the induced voltage signal and supplies power to the respective components in the signal generator 20.
  • the information input device 50 modulates the phase of the electromagnetic wave to transmit the synchronization signal to the signal generator is described, but it is also possible to transmit information other than the synchronization signal.
  • the signal generator 20 may transmit information (eg, button information, writing pressure information, etc.) generated therein to the information input device 50 in the same manner as a general radio frequency recognition method.
  • the phase modulation method has been described as an example of a method of including information such as a synchronization signal in an electromagnetic wave and transmitting the information, but the information may be transmitted by applying various methods used in other communication fields.
  • FIGS. 8 and 9 an information input system according to a second preferred embodiment of the present invention will be described with reference to FIGS. 8 and 9.
  • the information input system according to the second embodiment is different from the first embodiment in that a synchronization signal is generated by the signal generator and transmitted to the information input device.
  • the second embodiment will be described centering on these differences.
  • FIG. 8 is a block diagram showing a configuration of a signal generator according to the second embodiment.
  • the functional blocks illustrated in FIG. 8 are implemented in a pen type or various types of signal generators as in FIG. 5, and are represented as functional blocks in FIG. 8 for convenience of description.
  • the signal generator 800 of the second embodiment includes a resonance circuit unit 810, a synchronization signal generator 830, an ultrasonic signal generator 840, and a rectifier 820.
  • the resonant circuit unit 810 generates AC power by using electromagnetic waves generated by the information input device 900 and provides the rectified power to the rectifier 820, and according to the control of the synchronization signal generator 830.
  • the electromagnetic wave is generated and transmitted to the information input device 900.
  • the resonant circuit unit 810 generates an electromagnetic wave including the synchronization signal when the synchronization signal is input from the synchronization signal generator 830.
  • the rectifier 820 rectifies the AC power input from the resonant circuit unit 810 and supplies power to the synchronization signal generator 830 and the ultrasonic signal generator 840.
  • the synchronization signal generator 830 receives power from the rectifier 820, generates a synchronization signal at a predetermined time interval or at an arbitrary time interval, and outputs the synchronization signal to the ultrasonic signal generator 840 and the resonant circuit unit 810.
  • the signal generator 840 generates an ultrasonic signal when a synchronization signal is input.
  • the synchronization signal generator 23 detects the synchronization signal included in the electromagnetic wave received from the information input device 50 to generate the synchronization signal to be used in the signal generation device 20.
  • the synchronization signal may be identification information of the signal generator, or may simply be a control signal for indicating only the time point at which the ultrasonic signal is generated.
  • the resonant circuit unit 810 includes the identification information in the electromagnetic wave, and in the latter case, it is sufficient to generate the electromagnetic wave of a specific frequency.
  • the signal generator 800 may include a pen nib inside, and may include pressure information sensors and buttons for measuring pen pressure, and include pressure information and button information as described above. May be included in the electromagnetic wave and transmitted to the information input device 900 in the same manner as that included in the electromagnetic wave.
  • the information input apparatus 900 may include two or more ultrasonic sensors 958, an analog amplifier 954, a digital signal converter 955, and an antenna coil unit spaced apart from each other. 951, an antenna coil driver 952, a signal detector 959, a position measuring unit 956, a controller 953, and an external interface unit 957.
  • the antenna coil driver 952 converts a series of pulse trains input from the controller 953 into an analog signal and outputs the analog signal through the antenna coil unit 951.
  • the antenna coil unit 951 generates an electromagnetic wave corresponding to an analog signal input from the antenna coil driver 952 to supply power to the signal generator 800, and receives the electromagnetic wave generated by the resonance circuit unit 810. Output to the detection unit 959.
  • the signal detector 959 detects a synchronization signal from the electromagnetic wave received from the signal generator 800 and outputs the synchronization signal to the controller 953. Since the synchronization signal of the present invention is to allow the information input device 900 to know the time when the ultrasonic signal is generated, the signal generator 800 generates the electromagnetic wave at a predetermined frequency without transmitting special information and inputs the information. When notifying only the generation time of the ultrasonic signal to the device 900, the signal detector 959 detects only the electromagnetic wave of the corresponding frequency and outputs the fact that the electromagnetic wave of the corresponding frequency is received to the controller 953 to detect the synchronization signal. Can be.
  • the signal generator 800 when the signal generator 800 generates an electromagnetic wave including specific information such as its own identification information (pen pressure information, button information, etc.), the signal detector 959 is used by the signal generator 800. According to the modulation method described above, the electromagnetic wave can be demodulated to detect information and output the detected information to the controller 953.
  • the method of detecting information may be variously applied according to a method in which a signal is modulated in the signal generating apparatus, and similarly to the first embodiment, phase modulation may be detected and detected.
  • the controller 953 generally controls the functions of the components included in the information input device 900, and in particular, supplies the power to the signal generator 800 by controlling the antenna coil driver 952 to generate electromagnetic waves.
  • the synchronization signal input from the signal detection unit 959 or time information when the synchronization signal is detected is output to the position measurement unit 956.
  • the position measuring unit 956 receives time information when the synchronization signal or the synchronization signal is received from the control unit 953, and at each of the ultrasonic sensors 958 inputted by the digital signal converter 955 and the time when the information is input.
  • the position of the signal generator 800 is measured using the time difference between the times when the ultrasonic signals are received. Since the method of generating the location information by measuring the location of the signal generator 800 is the same as in the first embodiment, a detailed description thereof will be omitted.

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

La présente invention concerne un système d'entrée d'informations et un procédé d'entrée d'informations pour entrer des informations d'emplacement en mesurant un emplacement d'un dispositif de génération de signal. Le dispositif de génération de signal de la présente invention est réalisé en tant que dispositif de génération de signal sans alimentation qui ne nécessite pas de sources d'alimentation individuelles spéciales, en générant un signal ultrasonore et en étant commandé avec la puissance qui est induite par une onde électromagnétique générée par un dispositif d'entrée d'informations. Ainsi, l'invention est peu coûteuse du fait de la réduction des coûts de commutateur d'alimentation, et fournit le système d'entrée d'informations avec une configuration de circuit simple. En outre, l'invention synchronise le dispositif de génération de signal avec le dispositif d'entrée d'informations en permettant au dispositif d'entrée d'informations de moduler la phase de l'onde électromagnétique et de transmettre un signal de synchronisation au dispositif de génération de signal, de sorte que le dispositif de génération de signal puisse détecter le signal de synchronisation en détectant la modulation de phase d'un signal de tension induit qui est induit pour correspondre à l'onde électromagnétique dont la phase est modulée. Par conséquent, étant donné qu'un signal infrarouge qui est sensible à l'environnement externe n'est pas utilisé, l'invention est capable d'entrer des informations de manière plus fiable.
PCT/KR2010/001434 2009-09-10 2010-03-08 Système et procédé d'entrée d'informations WO2011030984A1 (fr)

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KR102108915B1 (ko) * 2013-08-30 2020-05-12 엘지전자 주식회사 터치 패널
CN109949622A (zh) * 2017-12-21 2019-06-28 北京丰信达科技有限公司 一种智慧黑板的电子白板
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