WO2011159090A2 - Étui-tablette pour appareil mobile - Google Patents

Étui-tablette pour appareil mobile Download PDF

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Publication number
WO2011159090A2
WO2011159090A2 PCT/KR2011/004356 KR2011004356W WO2011159090A2 WO 2011159090 A2 WO2011159090 A2 WO 2011159090A2 KR 2011004356 W KR2011004356 W KR 2011004356W WO 2011159090 A2 WO2011159090 A2 WO 2011159090A2
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WO
WIPO (PCT)
Prior art keywords
electronic pen
tablet
mobile device
case
case body
Prior art date
Application number
PCT/KR2011/004356
Other languages
English (en)
Korean (ko)
Other versions
WO2011159090A3 (fr
Inventor
한주훈
Original Assignee
주식회사 윈터치
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Publication date
Application filed by 주식회사 윈터치 filed Critical 주식회사 윈터치
Publication of WO2011159090A2 publication Critical patent/WO2011159090A2/fr
Publication of WO2011159090A3 publication Critical patent/WO2011159090A3/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
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • 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
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1626—Constructional details or arrangements for portable computers with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
    • G06F2200/163—Indexing scheme relating to constructional details of the computer
    • G06F2200/1632—Pen holder integrated in the computer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2200/00—Indexing scheme relating to G06F1/04 - G06F1/32
    • G06F2200/16—Indexing scheme relating to G06F1/16 - G06F1/18
    • G06F2200/163—Indexing scheme relating to constructional details of the computer
    • G06F2200/1633—Protecting arrangement for the entire housing of the computer

Definitions

  • the present invention relates to a tablet case for a mobile device, and more particularly, to a tablet case for a mobile device to which a tablet function for detailed pen input is added.
  • PCs personal computers
  • Such portable mobile devices have made great progress to effectively provide a user interface (UI) in a small device.
  • UI user interface
  • numbers were input using a keypad, and a touch panel, which is a method in which a person directly selects an input on a screen, is gradually being used.
  • resistive type touch panels and capacitive type touch panels are widely used in electronic notebooks, personal digital assistants (PDAs), portable PCs, and mobile phones.
  • Capacitive touch screens are used because they have a higher transmittance than a resistive touch screen, can be detected by light touches, and are easy to implement multi-touch and small in size.
  • An object of the present invention is to add a tablet function that enables fine pen input to a case such as a smart phone and electrically connected to a portable mobile device to enable drawing or handwriting input on a portable mobile device.
  • a tablet case for the device.
  • the case body An electronic pen with a built-in resonant circuit; A tablet provided in the case body to sense a position of the electronic pen; And a connector provided at a position where the case body and the connection terminal of the mobile device are connected to electrically connect the tablet and the mobile device.
  • the tablet is provided with a loop coil and a loop coil unit for emitting a first electromagnetic force to generate an induced voltage in the resonant circuit;
  • a sensor board having a closed loop type loop antenna disposed inside the loop coil unit and a plurality of line antennas having one end electrically coupled to the loop antenna and the other end arranged in parallel with each other to cross the loop antenna;
  • a position signal generator configured to detect a second electromagnetic force emitted from the electronic pen using the first electromagnetic force as driving energy and output a position signal of the electronic pen.
  • the tablet may include a coil driver configured to apply the driving voltage to the loop coil part; An information detecting unit detecting electronic pen information output from the electronic pen by detecting a shaking generated in the driving voltage by the second electromagnetic force; And outputting a control signal for controlling the driving voltage applied by the coil driver in a coordinate measurement mode and an electronic pen information acquisition mode in time, and using the position signal in the coordinate measurement mode.
  • the electronic device may further include a first controller configured to detect a position and detect the electronic pen information in the electronic pen information acquisition mode.
  • the sensor board may include a plurality of first line antennas arranged in parallel in one direction; And a plurality of second line antennas intersecting the first line antenna in an insulated state and arranged in parallel with each other.
  • the position signal generator may include a multiplexer for selecting the other end of at least one of the first and second line antennas.
  • the loop antenna and the plurality of line antennas may be formed of a conductive transparent material.
  • the sensor board may be provided integrally with the front portion of the case body.
  • the sensor board may be provided such that only one side of the sensor board is coupled between the front part and the rear part of the case body to allow relative rotation to the case body.
  • the electronic pen may include a comparison unit configured to compare an induced voltage generated by resonance of the resonance circuit with a predetermined reference voltage; And a second controller configured to distinguish between the coordinate measuring mode and the electronic pen information obtaining mode according to a result of the comparison, and to output the electronic pen information in the electronic pen information obtaining mode.
  • It may further include a wireless power supply device provided in the case body for wirelessly supplying power to the mobile device.
  • the case body may include a holder part provided at a side of the case body part and detachable from the electronic pen; And a switch button part provided adjacent to the holder part and pressed when the electronic pen is mounted to the holder part.
  • the switch button unit may include a push lock that maintains the pressed state of the switch button unit even when the electronic pen is not mounted on the holder unit.
  • the present invention by adding a tablet function that enables fine pen input to a case such as a smart phone, and electrically connected to the portable mobile device, drawing or handwriting input is possible on the portable mobile device.
  • the tablet case for mobile devices is provided with a built-in wireless power supply that enables wireless power supply to mobile devices.
  • FIG. 1 is a perspective view of a tablet case for a mobile device according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged view of portion A of FIG. 1.
  • FIG. 3 is a view schematically showing the overall structure of FIG.
  • FIG. 4 is a diagram illustrating a detailed configuration of the electronic pen and the tablet of FIG. 1.
  • FIG. 5 is a diagram illustrating a driving signal and output voltages of a resonant circuit of a loop coil and an electronic pen.
  • FIG. 6 is a diagram illustrating a form of a sensed voltage output according to the position of the electronic pen with respect to the line antenna in the loop antenna.
  • FIG. 7 is a diagram for describing a method of generating a position signal using the sense voltage shown in FIG. 6.
  • FIG. 8 is a diagram illustrating a form of a position signal output from line antennas when the electronic pen is present at various positions inside the loop antenna.
  • 9 is a view showing the shape of various signals in the electronic pen and the tablet.
  • FIG. 10 is a view showing the intensity distribution of the electromagnetic force in the sensor board.
  • FIG. 11 is a diagram illustrating a configuration when the tablet case for a mobile device is connected to a wireless power supply device.
  • FIG. 12 is a perspective view of a tablet case for a mobile device according to a second embodiment of the present invention.
  • FIG. 13 is a view illustrating a usage method of FIG. 12.
  • FIG. 14 is a view schematically illustrating a circuit diagram and a signal size according to the case of FIG. 13.
  • FIG. 15 is a view illustrating still another use method of FIG. 13.
  • FIG. 16 is a view schematically illustrating a circuit diagram and a signal size according to the case of FIG. 15.
  • FIG. 17 is a perspective view of a tablet case for a mobile device according to a third embodiment of the present invention.
  • FIG. 1 is a perspective view of a tablet case for a mobile device according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of a portion A of FIG. 1
  • FIG. 3 is a diagram schematically showing the overall structure of FIG. 1
  • FIG. 4 is a diagram illustrating a detailed configuration of the electronic pen and the tablet of FIG. 1
  • FIG. 5 is a diagram illustrating a driving signal and output voltages of a loop coil and a resonant circuit of the electronic pen
  • FIG. 7 is a diagram illustrating a form of a sensing voltage output according to the position of the electronic pen with respect to the line antenna.
  • FIG. 7 is a diagram for describing a method of generating a position signal using the sensing voltage shown in FIG. 6.
  • FIG. 9 shows various forms of signals inside the electronic pen and the tablet.
  • figure 10 is a view showing the configuration when a view showing the intensity distribution of the electromagnetic force of the sensor board, the case 11 is a tablet for mobile devices connected to a wireless power supply.
  • the tablet case 1 for a mobile device includes a case body 100, an electronic pen 200 having a resonant circuit 210 therein, and a case body.
  • the tablet 300 is provided on the 100 and senses the position of the electronic pen 200, the wireless power supply 400 provided on the case body 100 to supply power to the mobile device wirelessly, and the case.
  • a connector 500 provided at a position at which the main body 100 and a connection terminal of the mobile device are connected to electrically connect the tablet 300 and the mobile device.
  • the case body 100 is manufactured for each device in accordance with the size of the mobile device to accommodate the mobile device, the tablet 300 circuit and the wireless power supply 400 is built in the size that can be mounted inside the basic It acts as a case to protect the mobile device from external shocks and prevent scratches.
  • the case body 100 is provided with a holder part 110 that can attach and detach the electronic pen 200.
  • the holder unit 110 has an inner ring-shaped inner surface having a circumference larger than a semicircle on the side of the case body 100 and is made of an elastic material to mount the electronic pen 200 with a small force. Even if the pressing unit 110 is pressed, the elastic holder unit 110 is opened, and the holder unit 110 can hold the electronic pen 200 by restoring elastic force after the electronic pen 200 is mounted. Even when the electronic pen 200 is detached from the holder 110, when the electronic pen 200 is pulled with a small force, the holder 110 is opened by elasticity and the electronic pen 200 is separated, and the holder 110 is separated. Is returned to the state before the pressing operation by the elastic restoring force.
  • the switch button unit 120 is provided at an adjacent position of the holder unit 110 in combination with a member having an elastic force and repeating the pressing and restoring operation by the elastic restoring force.
  • the switch button unit 120 is provided at a position where the switch button unit 120 can be pressed by the electronic pen 200 when the electronic pen 200 is mounted on the holder unit 110.
  • the function of the tablet 300 of the tablet case 1 for a mobile device is cut off and the function of the wireless power supply 400 is operated. Therefore, when the electronic pen 200 is mounted, as the switch button unit 120 is pushed, the tablet case 1 for the mobile device operates as the wireless power supply 400, and the electronic pen 200 is moved from the holder.
  • the switch button unit 120 is restored, the tablet case 1 for a mobile device operates as the tablet 300 input device of the mobile device.
  • the switch button unit 120 is a switch button unit if you want to use the tablet case 1 for a mobile device only as a wireless power supply 400 even if the electronic pen 200 is lost or the electronic pen 200 is not mounted.
  • the push button 121 may be pressed to push the switch button unit 120 to the side so that the state of the press 120 may be maintained continuously, and the push button 121 may be fixed to the pressed state.
  • the push lock 121 is a lower portion of the switch button unit 120 to make a single layer by pressing the switch button unit 120 to push sideways so that the switch button unit 120 can be kept in a pressed state.
  • the switch button unit 120 and the push lock 121 according to the first embodiment of the present invention have been described by simplifying the structure and operation thereof, but the scope of the present invention is not limited thereto.
  • other push locks 121 may be used.
  • the push lock may be provided in a form in which the pressing state is maintained by pressing once and not restored by pressing sideways and restored by pressing once again.
  • the electronic pen 200 is used as a means for inputting a coordinate desired by the user, and includes a resonant circuit 210 resonating with an electromagnetic force (first electromagnetic force) output from the loop coil unit 310 of the tablet 300. .
  • the circuits inside the electronic pen 200 operate with energy induced voltage generated by the resonance of the resonance circuit 210.
  • the electronic pen 200 transmits the user input information and the position signal of the electronic pen 200 to the tablet 300. Circuit part is included.
  • the circuit unit of the electronic pen 200 receives a induced voltage generated by the resonance circuit 210 to generate a power source.
  • the coordinate measurement mode and the electronic pen 200 information acquisition mode according to the result of the comparison unit 230, the information input unit 240 for receiving user information, and the comparison unit 230 for comparing the induced voltage generated by the predetermined voltage.
  • a second control unit 250 for classifying and outputting the electronic pen 200 information in the electronic pen 200 information acquisition mode.
  • the resonance circuit 210 includes a resonator element 211 including an inductor and a capacitor for resonating the first electromagnetic force emitted from the tablet 300.
  • the resonance circuit 210 may further include a switching element 251 for controlling resonance.
  • a power generator 220 for receiving an induced voltage generated in the resonant circuit 210 by the first electromagnetic force is disposed.
  • the power generator 220 rectifies the induced voltage and normalizes the current and the voltage to generate the operating power of the second controller 250.
  • the power generator 220 simultaneously generates a reference voltage having a predetermined value.
  • the comparator 230 compares the induced induced voltage after output from the resonant circuit 210 with a reference voltage and outputs the result to the second controller 250.
  • the information input unit 240 may include a pen pressure sensor 241 for detecting a pressure of the user pressing the electronic pen 200 against the sensor board 320 of the tablet 300, and a plurality of buttons for inputting a user's selection. 242, a dial (not shown) for inputting the subdivided values is further provided.
  • the information input unit 240 may further include a memory 243 that stores various information such as user information about the electronic pen 200.
  • the second control unit 250 receives and drives operating power from the power generation unit 220, and processes and outputs user manipulation information by the information input unit 240 into a switching signal for driving the switching element 251. .
  • the switching signal turns the switching element 251 on and off, thereby changing the flow of current in the resonant circuit 210 and causing slight shaking in the second electromagnetic force emitted from the resonant circuit 210. This shaking causes the shaking to the driving voltage flowing through the loop coil 310 of the tablet 300.
  • the tablet 300 is provided with a coil in the form of a loop and the loop coil unit 310 for emitting a first electromagnetic force to generate an induced voltage in the resonant circuit 210 and the driving voltage to the loop coil unit 310
  • One end is electrically coupled to the coil driving unit 330 to be applied and the closed loop loop antenna 321 and the loop antenna 321 disposed inside the loop coil unit 310, and the other ends are arranged in parallel to each other to form a loop.
  • the sensor board 320 includes a plurality of line antennas 322 that cross the antenna 321, and a second electronic force that senses a second electromagnetic force emitted from the electronic pen 200 that uses the first electromagnetic force as driving energy.
  • 340 and applied from the coil drive unit 330 Outputs a control signal for controlling the driving voltage to be divided into the coordinate measuring mode and the electronic pen 200 information acquisition mode in time, and detects the position of the electronic pen 200 using the position signal in the coordinate measuring mode.
  • the pen 200 includes a first control unit 360 that detects information of the electronic pen 200 in the information acquisition mode.
  • the loop coil unit 310 is formed of a loop coil that surrounds the outer surface of the sensor board 320, which is a coordinate input surface of the tablet 300, in a closed loop shape, and is driven by the coil driver 330 described later.
  • the electromagnetic force is emitted to the outside of the sensor board 320 by the voltage.
  • the shape of the sensor board 320 has a rectangular shape
  • the loop coil of the loop coil unit 310 also has a rectangular shape to surround the outer shape of the sensor board 320.
  • the loop coil may be formed by attaching a conductive wire to a rigid or flexible substrate or by patterning using a photolithography method.
  • the sensor board 320 is disposed inside the rectangular closed loop formed by the loop coil of the loop coil unit 310 and is connected to the loop antenna 321 and the loop antenna 321 which are closed loops having the same rectangular shape as the loop coil. One end is electrically coupled and the other end has a plurality of line antennas 322 parallel to each other extending outwardly across a closed loop formed by the loop antenna 321.
  • the line antenna 322 is insulated from the loop antenna 321 except for one end coupled to the loop antenna 321.
  • the sensor board 320 is integrally provided at the front part of the case body 100, and when the user uses the tablet 300 function, the position information in the software is directly touched on the display screen of the mobile device. You can adjust the processing.
  • the loop coil of the above-described loop coil only has the form of a closed loop, and one end and the other end of the coil are electrically separated from each other, so that current may flow into one end and flow out of the other end, but the loop antenna 321 may It forms an electrical closed loop by itself and is connected to one of the inputs of the amplifier 351 of the position signal generator 350 to be described later.
  • the line antenna 322 is insulated from the line antennas 322 in the first direction and the line antennas 322 in the first direction, which are arranged in parallel at equal intervals, and the line antennas 322 in the first direction. ) And a plurality of line antennas 322 in a second direction crossing the.
  • a 1st direction and a 2nd direction are directions orthogonal to each other (for example, X-axis direction and Y-axis direction, respectively).
  • the spacing between the line antennas 322 in the first direction and the spacing between the line antennas 322 in the second direction are equal to each other, so that the entire line antennas 322 are arranged in the form of a plurality of square meshes. do.
  • the other ends of the line antennas 322 extending outside the loop antenna 321 are connected to a multiplexer of the position signal generator 350 to be described later.
  • the line antennas 322 in the X-axis direction detect the position of the electronic pen 200 in the Y-axis direction, and the line antennas 322 in the Y-axis direction.
  • the position of the electronic pen 200 in the X-axis direction can be detected, and as a result, two-dimensional plane coordinates can be obtained.
  • the coil driver 330 is a power supply circuit in which both ends of the loop coil of the loop coil unit 310 are coupled, and the driving voltage is supplied to the loop coil unit 310 according to a control signal input from the first control unit 360 to be described later. Is applied.
  • the applied voltage is preferably a square wave or sinusoidal voltage having a predetermined frequency and constant amplitude.
  • the information detector 340 detects the shaking of the voltage generated in the waveform of the driving voltage supplied from the coil driver 330 to the loop coil 310 and outputs the information as the electronic pen 200 information. Since the loop coil of the loop coil unit 310 is also affected by electromagnetic force in the form of a coil, the induced voltage is caused by an externally acting electromagnetic force (for example, an electromagnetic force emitted by the resonant circuit 210 in the electronic pen 200). In this case, the induced voltage affects the driving voltage output from the coil driver 330 to cause the driving voltage to shake.
  • the position signal generator 350 selects at least one line antenna 322 of the plurality of line antennas 322 in the X-axis direction using a multiplexer, and between the line antenna 322 and the loop antenna 321. Senses the generated voltage (induction voltage by the electronic pen 200), and simultaneously (or optionally) selects at least one line antenna 322 of the plurality of line antennas 322 in the Y-axis direction using a multiplexer The voltage generated between the line antenna 322 and the loop antenna 321 is sensed. The magnitude and phase of these voltages are processed and output to the first control unit 360 as a position signal.
  • the first controller 360 refers to a controller located on the tablet 300 side in the tablet case 1 for a mobile device according to the first embodiment of the present invention.
  • the first controller 360 inputs a control signal to the coil driver 330 to apply a driving voltage to the loop coil unit 310.
  • the pen pressure and the information transmitted from the memory 243 built in the electronic pen 200 are recognized.
  • the position or coordinates of the electronic pen 200 on the line antenna 322 are measured using the position signal output from the position signal generator 350.
  • the first controller 360 transmits the coordinates and the electronic pen 200 information measured by communicating with the mobile device through the connector 500 connected to the mobile device.
  • FIG. 4 is a diagram illustrating a detailed configuration of the electronic pen circuit unit and the tablet circuit unit in FIG. 3. Referring to these drawings, a detailed configuration of the electronic pen 200 and the tablet 300 according to the first embodiment of the present invention and the operation of the electronic pen 200 and the tablet 300 having such a configuration will be described below. same.
  • the loop coil unit 310 is formed of a loop coil connected to the coil driver 330 to receive a driving voltage.
  • the coil driver 330 applies a square wave voltage having a predetermined frequency to the loop coil according to a control signal provided from the first controller 360.
  • the drive voltage can be controlled independently of frequency and amplitude.
  • the information detector 340 is connected to an output terminal for applying the driving voltage, and a part of the driving voltage is also input to the information detector 340. As a result, the shaking of the driving voltage due to an external influence can be detected by the information detector 340.
  • the information detector 340 rectifies the input driving voltage through the rectifier 341, and then passes the low pass filter 342, the band pass filter 343, and the low pass filter 344 to supply the driving voltage to the electronic pen. Only the portion shaken by the second electromagnetic force output from the 200 is extracted, and the result is passed through the comparator 345 and converted into information of the electronic pen 200 having an approximately digitized form.
  • the electronic pen 200 information is input to the first control unit 360, and the first control unit 360 analyzes the electronic pen 200 information and transmits information transmitted from the electronic pen 200 such as a user's operation. Recognize.
  • one line antenna 322 is sequentially arranged from the first line antenna 322 to the nth line antenna 322. Is selected, and the amplifier 351 outputs the induced voltage generated between the selected line antenna 322 and the loop antenna 321 as the sensed voltage. At this time, the output sensed voltage passes through the bandpass filter 352 to remove noise.
  • the sensed voltage output from the amplifier 351 is a sinusoidal signal having a predetermined frequency.
  • the noise-rejected sense voltage passes through the first sample / hold circuit 353 to become a stepped signal in which the peak of the sinusoidal signal is held.
  • the first sample / hold circuit 353 performs sampling and holding in synchronization with the frequency of the sense voltage.
  • the sensed voltage is an induced voltage generated by the loop antenna 321 resonating by an electromagnetic force (second electromagnetic force) generated in the resonant circuit 210 of the electronic pen 200, and the resonant circuit 210 of the electronic pen 200 also loops. Since the resonance is caused by the first electromagnetic force output from the coil unit 310, the sensing voltage has the same frequency as that of the driving voltage.
  • the stepped signal output through the first sample / hold circuit 353 is input to the integrator 354.
  • the integrator 354 operates after a predetermined time elapses after the sensing voltage is generated by the electronic pen 200. More precisely, the coil driving unit 330 applies a driving voltage to the loop coil unit 310 and operates after a predetermined time elapses, and integrates the value of the stepped signal input.
  • the integrated value is sampled and held in the second sample / hold circuit 356, and the value is provided to the first controller 360 as a position signal.
  • the first controller 360 determines the position of the electronic pen 200 between the loop antenna 321 and the line antenna 322 selected by the multiplexer using the magnitude and phase of the input position signal. As a result, the coordinates of the electronic pen 200 with respect to any one axis can be determined, and the position by the X-axis line antenna 322 and the position by the Y-axis line antenna 322 are combined with respect to the electronic pen 200. You can create two-dimensional coordinates.
  • the first controller 360 synthesizes the position signals output by the line antennas 322 sequentially selected by the multiplexer. That is, in the vicinity of the position where the electronic pen 200 is located, there is a line antenna 322 in which the phase signal of the position signal is reversed. This position can be approximated to the position of the electronic pen 200.
  • the distance of the electronic pen 200 from the line antenna 322 may be measured by measuring the magnitude of the position signal of the.
  • FIG. 5 illustrates driving signals and output voltages of the resonant circuit 210 of the loop coil and the electronic pen 200.
  • Waveform 1 indicates a control signal output from the coil driver 330.
  • the waveform of 2 is a waveform of the first electromagnetic force emitted from the loop coil unit 310 by the driving voltage applied from the coil driver 330 to the loop coil unit 310.
  • the first coil force is emitted from the loop coil part 310 by the vibrations of the driving voltages LOW and HIGH, and when the HIGH (or LOW) is kept constant, the electromagnetic force emission from the loop coil part 310 is stopped.
  • the waveform of a is a waveform of an induced voltage generated in the resonant circuit 210 of the electronic pen 200 resonating by the first electromagnetic force, and may be a waveform of the first electromagnetic force and the second electromagnetic force emitted from the resonant circuit 210. have. As shown in FIG. 3, energy by the first electromagnetic force charged in the resonant circuit 210 of the electronic pen 200 is gradually released from the resonant circuit 210 when the first electromagnetic force is removed.
  • FIG. 6 is a diagram illustrating a form of a sensed voltage output according to the position of the electronic pen 200 with respect to the line antenna 322 in the loop antenna 321.
  • the waveform of 1 is a control signal
  • the waveform of 2 is the first electromagnetic force
  • the waveform of a is the waveform of the first electromagnetic force and the second electromagnetic force.
  • the waveform of 3 is the waveform of the sensed voltage output from the amplifier 351 of the position signal generator 350. That is, in the schematic diagram of the loop antenna 321 shown at the bottom of FIG. 4, on the left side of the line antenna 322, depending on the position of the electronic pen 200 relative to any one of the line antennas 322 selected by the multiplexer.
  • the case where the electronic pen 200 is located is referred to as the 'X-' position, and the output at this time is represented as' X- 'in the waveform of 3, and the case where the electronic pen 200 is positioned directly above the line antenna 322 is'
  • the output at this time is represented by '0' in the waveform of 3 and the position of the electronic pen 200 on the right side of the line antenna 322 is set to the 'X +' position. It is represented by 'X +'.
  • the sensing voltage has a waveform in which the first electromagnetic force and the second electromagnetic force are in phase with the frequency of the driving voltage and smoothly attenuate.
  • the sensing voltage is detected only the driving voltage (first electromagnetic force) of the loop coil and the influence (second electromagnetic force) caused by the electronic pen 200 is weak and rapidly decreases to zero. do.
  • the detection voltage is initially affected by the first electromagnetic force because the phase of the first electromagnetic force and the second electromagnetic force by the loop coil is 180 °. Thereafter, it becomes a waveform of the second electromagnetic force, which decreases and shows a 180 ° phase difference in the first electromagnetic force. That is, a section in which the waveform suddenly decreases and the phase reverses occurs.
  • FIG. 7 is a diagram for describing a method of generating a position signal using the sensing voltage shown in FIG. 6.
  • the sensing voltage is generated as in the waveform of 4.
  • the waveform of 4 shows all three cases of 'X-', '0', and 'X +' according to the position of the electronic pen 200 with respect to the line antenna 322.
  • the first sample / hold circuit 353 is driven according to the waveform of V provided by the first control unit 360, and has a stepped shape such as 5 based on the 'X ⁇ ', '0' and 'X +' waveforms.
  • the signal is generated.
  • a stepped signal such as 5 is input to the integrator 354, and the operation of the integrator 354 is controlled by the waveform of V provided from the first control unit 360. That is, the integrator 354 does not operate in the section of T1, and generates a signal such as 6 by integrating the stepped signal input only in the section of T2.
  • the second sample / hold circuit 356 samples the signal of 6 in the section of T3 after a predetermined time (for example, after the time of the integrator 354 starts integration and approximately T2 has elapsed). Hold. The value at this time becomes a position signal.
  • FIG. 8 illustrates the form of position signals output from the line antennas 322 when the electronic pen 200 exists at various positions inside the loop antenna 321. As shown in the drawing, when the electronic pen 200 is present at the positions of 1, 2, and 3, respectively, position signals of various sizes appear in each line antenna 322.
  • the position of the phase signal inverted can be found and the position of the electronic pen is determined. It can be detected as the position of 200.
  • the method of selecting one of the plurality of line antennas 322 by the multiplexer in addition to the method of selecting each line antenna 322 one by one from the line antenna 322 of one side to the other end, Finally, various methods such as initiating a selection from a specific position where the position of the electronic pen 200 is detected can be used.
  • the input of the loop antenna 321 input to the amplifier 351 selects the line antenna 322 and the loop antenna 321 by selecting two line antennas 322 existing outside the selected line antenna 322. It is also possible to form a virtual loop antenna 321 consisting of a portion. According to this configuration, the distance between the selected line antenna 322 and the loop antenna 321 can be reduced, so that the magnitude of the signal output from the selected line antenna 322 can be accurately measured.
  • FIG. 9 is a diagram illustrating various signals in the electronic pen 200 and the tablet 300.
  • time is divided into a coordinate measuring mode and an electronic pen 200 information acquisition mode, and in the coordinate measuring mode, the coordinates of the electronic pen 200 are measured and the electronic pen In the information acquisition mode, operation information from the electronic pen 200 is recognized.
  • the driving voltage is applied as the waveform of 1.
  • the driving voltage is divided into a section of the coordinate measuring mode and a section of the electronic pen 200 information acquisition mode. That is, the section of the coordinate measuring mode has an energy supply section in which the driving voltage oscillates at a predetermined frequency and a position measuring section in which the driving voltage does not oscillate, and the section of the electronic pen 200 information acquisition mode receives data in which the driving voltage continuously oscillates. Only has a section.
  • the energy is supplied to the resonant circuit 210 by releasing the first electromagnetic force from the loop coil 310 toward the electronic pen 200 in the energy supply section in the coordinate measuring mode, and in the position measuring section.
  • the position of the electronic pen 200 is measured by using the second electromagnetic force emitted by the resonant circuit 210 charged with power.
  • the information input unit 240 controls the switching element 251 to generate a shake in the resonance of the resonance circuit 210.
  • the shaking causes the shaking of the second electromagnetic force directed toward the tablet 300, and detects the information of the electronic pen 200 by detecting the information by the information detecting unit 340 of the tablet 300.
  • the first electromagnetic force is generated only in the energy supply section in the coordinate measurement mode, in the electronic pen 200 information acquisition mode, the first electromagnetic force is the maximum output by the continuous vibration of the driving voltage It can be seen that it is released.
  • the magnitude of the waveform a representing the induced voltage (or the second electromagnetic force) generated by the resonance circuit 210 of the electronic pen 200 by the first electromagnetic force is the information of the electronic pen 200 in the coordinate measuring mode. It can be seen that it has a relatively lower value than in the acquisition mode.
  • the electronic pen 200 uses the difference in electromagnetic force to distinguish between the coordinate measuring mode and the electronic pen 200 information acquisition mode. That is, the waveform of a, which is a voltage induced in the resonant circuit 210 of the electronic pen 200, is rectified by passing through the rectifier 221 to appear as a waveform of b, and the waveform of b is divided into a waveform of d. The waveform of f is generated by comparing the waveform of d with the reference voltage c. The second controller 250 can determine whether the tablet 300 is in the coordinate measuring mode or the electronic pen 200 information acquisition mode based on the waveform of f.
  • the waveform of a which is a voltage induced in the resonant circuit 210 of the electronic pen 200
  • the electronic pen 200 information acquisition mode the electronic pen 200 information is mapped to a waveform of. That is, the second control unit 250 generates a switching signal having a waveform of g based on the output of the information input unit 240.
  • the second electromagnetic force emitted from the resonant circuit 210 of the electronic pen 200 generates an instantaneous shaking such as the right side of the waveform of.
  • This shaking affects the driving voltage of the loop coil unit 310, and the affected driving voltage is shown as a waveform of 8 after passing through the rectifier 341 of the information detecting unit 340.
  • the shaking caused by the operation information appears minutely, and this portion needs to be extracted and amplified.
  • the waveform of 8 passes through the low pass filter 342, the band pass filter 343, and the low pass filter 344, and appears as waveforms of 9, 10, and ⁇ , respectively.
  • the waveform of V passes through the comparator 345, and a signal having the waveform of V is generated, and the signal is provided to the first controller 360 as information on the electronic pen 200.
  • the first controller 360 recognizes the input information of the electronic pen 200, and detects the information by the user and the memory 243 such as a pen pressure, a button 242, and a dial (not shown).
  • a mode for measuring coordinates of the electronic pen 200 and a mode for obtaining information transmitted from the electronic pen 200 are provided. By processing in time division, each operation can be performed correctly with high precision.
  • the electronic pen 200 of the tablet case 1 for a mobile device does not need to provide a power supply means such as a separate battery, the energy of the electromagnetic force by the tablet 300 Since the weight of the electronic pen 200 can be reduced, the maintenance cost for the battery and the manufacturing cost of the tablet case 1 for a mobile device can be reduced.
  • the intensity distribution of the electromagnetic force is high outside of the loop antenna 321 adjacent to the loop coil unit 310. In this state, when the electromagnetic force emitted from the electronic pen 200 is smaller than the electromagnetic force emitted from the loop coil unit 310, there is a problem in that the position measurement is difficult.
  • the release of the first electromagnetic force in the loop coil unit 310 and the release and reception of the second electromagnetic force from the electronic pen 200 are performed. Since the separation is performed in time, the problem caused by the nonuniformity of the electromagnetic force distribution can be solved, and even the second electromagnetic force having a weak size can be accurately detected.
  • FIG. 11 is a diagram illustrating a configuration when the tablet case 1 for a mobile device according to the first embodiment of the present invention is connected to a wireless power supply.
  • an induced current is generated in the loop coil part 310 by an alternating current flowing through an electromagnetic force generator (not shown).
  • the generated induced current is converted into direct current by the AC-DC converter 410 in the wireless power supply 400 and supplied to the mobile device through the connector 500.
  • the AC-DC converter 410 may be configured as one of a rectifier circuit, a bridge circuit, a rectifier capacitor, and a constant voltage circuit.
  • the output of the AC-DC converter 410 is controlled within the operational range of the mobile device according to the type of the mobile device.
  • the tablet case 1 for a mobile device of the present invention it is possible to add and use the function of the tablet 300 which is a detailed pen input to the mobile device, and the effect of wirelessly supplying power to the mobile device. There is.
  • the tablet case 1 for a mobile device according to the second embodiment of the present invention will be described with reference to the accompanying drawings. However, the same description as that described in the tablet case 1 for a mobile device according to the first embodiment of the present invention will be omitted.
  • FIG. 12 is a perspective view of a tablet case for a mobile device according to a second embodiment of the present invention
  • FIG. 13 is a view showing a method of use of FIG. 12
  • FIG. 14 is a schematic diagram of a circuit diagram and a signal size according to the case of FIG. 13.
  • FIG. 15 is a diagram illustrating still another method of use of FIG. 13, and
  • FIG. 16 is a diagram schematically illustrating a circuit diagram and a signal size according to the case of FIG. 15.
  • the tablet case 1 for a mobile device includes a first embodiment in which the sensor board 320 is integrally provided on the front part of the case body 100. In contrast, only one side of the sensor board 320 is coupled between the front and rear parts of the case body 100 to provide relative rotation to the case body 100.
  • the tablet 300 may be directly touched on the display screen of the mobile device. Function is available.
  • the sensor board 320 is located on the lower surface of the case body 100 as shown in FIG. 15, the sensor board 320 may be used independently of the mobile device.
  • the sensing output from the amplifier 351 of the position signal generator 350 and the position of the electronic pen 200 accordingly are detected. Since the waveform of the voltage is 180 degrees out of phase, it is possible to determine the position of the sensor board 320 in software. As a result, the sensor board 320 can be freely positioned so that the tablet 300 function can be used more conveniently.
  • FIG. 17 is a perspective view of a tablet case 1 for a mobile device according to a third embodiment of the present invention.
  • the tablet case 1 for a mobile device of the present embodiment basically has the same configuration and operation as the second embodiment, and unlike the second embodiment, the short side of the sensor board 320 is coupled to the case body 100 so that the case body The relative rotation with 100 is provided.
  • the tablet case 1 for a mobile device of the present invention can be variously designed to meet the user's needs for user convenience.
  • the present invention is recognized in the field of mobile communication terminal equipment.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Electromagnetism (AREA)
  • Position Input By Displaying (AREA)
  • Telephone Set Structure (AREA)

Abstract

La présente invention concerne un étui-tablette destiné à un appareil mobile. L'étui-tablette pour appareil mobile selon la présente invention comprend un corps d'étui, un stylo électronique avec un circuit de résonance intégré, une tablette disposée dans le corps d'étui pour détecter la position du stylo électronique, et un connecteur disposé à l'endroit auquel le corps d'étui et une partie de borne de raccordement de l'appareil mobile doivent être connectés, afin de raccorder ensemble électriquement la tablette et l'appareil mobile. Selon la présente invention, un étui pour un smartphone ou similaire est doté d'une fonction de tablette permettant une saisie précise par le biais de stylets, et l'étui est relié électriquement à l'appareil mobile portable, permettant ainsi aux utilisateurs de dessiner des images ou de tracer des caractères cursifs sur l'appareil mobile portable.
PCT/KR2011/004356 2010-06-16 2011-06-14 Étui-tablette pour appareil mobile WO2011159090A2 (fr)

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KR1020100056885A KR101124522B1 (ko) 2010-06-16 2010-06-16 모바일 기기용 타블렛 케이스
KR10-2010-0056885 2010-06-16

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US20150049052A1 (en) * 2013-07-31 2015-02-19 Broadcom Corporation Wireless Device With Touch-Based Stylus
KR20170059456A (ko) * 2014-09-15 2017-05-30 마이크로소프트 테크놀로지 라이센싱, 엘엘씨 유도성 주변기기 보유 디바이스

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KR101960063B1 (ko) 2012-09-10 2019-03-19 삼성전자주식회사 터치 입력 디바이스 및 터치 입력 방법
KR102108915B1 (ko) 2013-08-30 2020-05-12 엘지전자 주식회사 터치 패널
KR102219857B1 (ko) * 2014-03-18 2021-02-24 삼성전자주식회사 전자 장치 및 그 동작 방법
KR101655371B1 (ko) * 2014-06-27 2016-09-08 이청명 휴대용 전자기기를 위한 케이스
KR101618286B1 (ko) * 2015-02-12 2016-05-04 주식회사 더한 정전용량 및 전자기유도 방식에 의한 위치검출이 가능한 디스플레이 모듈 및 이를 구비한 디스플레이 장치
KR102381445B1 (ko) * 2015-02-16 2022-04-01 삼성전자주식회사 전자 장치의 플립 커버 인식 방법, 전자 장치, 및 플립 커버
KR102453528B1 (ko) 2015-10-14 2022-10-13 삼성디스플레이 주식회사 전자기 유도 패널, 이를 포함하는 전자기 유도 장치 및 이를 포함하는 표시 장치
KR101716059B1 (ko) * 2015-12-16 2017-03-23 성균관대학교산학협력단 주파수 트래킹을 이용한 압력 감응 포인팅 장치 및 정보 처리 장치
KR20220030426A (ko) 2020-08-31 2022-03-11 삼성디스플레이 주식회사 표시 장치 및 이를 포함하는 전자장치
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KR20220078929A (ko) * 2020-12-04 2022-06-13 삼성전자주식회사 전자 펜을 이용하는 전자 장치 및 그 방법
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US20150049052A1 (en) * 2013-07-31 2015-02-19 Broadcom Corporation Wireless Device With Touch-Based Stylus
KR20170059456A (ko) * 2014-09-15 2017-05-30 마이크로소프트 테크놀로지 라이센싱, 엘엘씨 유도성 주변기기 보유 디바이스
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WO2011159090A3 (fr) 2012-03-15
KR101124522B1 (ko) 2012-03-19

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