Capacitive Or Inductive Stylus Patents (Class 178/19.03)
  • Patent number: 8294675
    Abstract: A touchpad assembly for use in an electronic device is provided. The touchpad assembly may include a touchpad frame operative to be placed within an opening in an electronic device frame. The touchpad assembly may include a support plate for supporting a touchpad, and a bracket for receiving a pick button. The support plate and bracket may be manufactured into a same component to increase the rigidity of the touchpad assembly. The pick button may include a varying height to prevent the pick button from deflecting and to make the pick button travel for providing a selection instruction uniform. The pick button may be coupled to the frame using any suitable approach, including using springs connected the ends of the pick button to the frame. The frame may also include pads to muffle the sound of the pick button when it returns to its initial position after having been pressed.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: October 23, 2012
    Assignee: Apple Inc.
    Inventors: Dinesh Mathew, Chris Ligtenberg, Brett William Degner, Thomas W. Wilson, Jr., John Brock
  • Patent number: 8278946
    Abstract: An apparatus and method for detecting the presence of a finger on a fingerprint sensor is disclosed in one embodiment of the invention as including transmitting a probing signal, comprising a series of probing pulses, to a fingerprint sensing area. A response signal, comprising a series of response pulses, is received from the fingerprint sensing area in response to the probing signal. An upper reference signal is generated and finger activity is detected on the fingerprint sensing area by monitoring whether the peaks of the response pulses exceed the reference signal.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: October 2, 2012
    Assignee: Validity Sensors, Inc.
    Inventors: Erik Jonathon Thompson, Gregory Lewis Dean, Jaswinder Jandu, Richard Alexander Erhart
  • Publication number: 20120228039
    Abstract: A stylus may have a flat portion on a movable tip at one end for contact with a flat surface, or a stylus may have movable pins adjustable in response to contact pressure for use with a non-flat surface.
    Type: Application
    Filed: March 9, 2011
    Publication date: September 13, 2012
    Inventors: Nigel Stephen Daniel Hinson, Thomas Matthew Bell
  • Patent number: 8232980
    Abstract: The present disclosure relates to a method of manufacturing a stylus pen configured to select one of plural pieces of content installed in advance in a communication terminal. Examples of the method comprise preparing a protective cap of a conductive fiber material by sequentially stacking nickel, copper and nickel on both sides of a polyester fiber by deposition coating, placing the protective cap on a mold, applying a bonding agent to an internal surface of the protective cap, and injecting a non-conductive liquid onto the internal upper portion of the protective cap.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: July 31, 2012
    Assignees: XG Solutions, LLC, Seoh Technology Co., Ltd.
    Inventors: Jong Woong No, Dong Sik Kim
  • Patent number: 8217918
    Abstract: A digitizer for user interaction via an object with an electronically refreshable display screen, the digitizer comprising: a transparent sensing arrangement of detectors located at said electronically refreshable display screen for detecting an electric field of said object, said detectors having outputs, and an arrangement of differential amplifiers associated with said outputs, thereby to apply differential detection between said outputs.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: July 10, 2012
    Assignee: N-trig Ltd.
    Inventors: Meir Morag, Haim Perski
  • Patent number: 8212550
    Abstract: A position indicator includes a tubular core member comprising a first magnetic core, a second magnetic core, a first coil, a second coil, a rod, a pen-pressure detecting element, a capacitor, and a switch. At least one of the first and second magnetic cores includes a recessed portion extending in the axial direction so as to form a through-hole when the first and second magnetic cores are combined, and the rod is inserted through the hole. The first coil is wound around the tubular core member, and the second coil is wound around the second magnetic core. The pen-pressure detecting element detects a pressure applied to an end of the rod (i.e., the pen tip). The capacitor is connected to the first coil to form a resonant circuit. The switch controls “on” and “off” states of the second coil to calculate a rotation angle of the position indicator.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: July 3, 2012
    Assignee: Wacom Co., Ltd.
    Inventors: Yuji Katsurahira, Hiroyuki Fujitsuka, Kimiyoshi Hosaka
  • Patent number: 8212795
    Abstract: In an exemplary embodiment, a stylus operates with a capacitive touch screen only when the stylus tip is in contact with the touch screen. The stylus is used as a sensor to determine the location where a user is touching the surface of a capacitive touch screen, but is not active until the stylus tip is pressed against the touch screen. In an exemplary embodiment, pressing the stylus tip against the touch screen activates the stylus by creating a physical separation in the circuit and disconnecting the stylus tip from ground. When the stylus tip is no longer grounded, it becomes active and is able to operate with a capacitive touch screen. In an exemplary embodiment, signal attenuation may be performed by diverting the sense signal to ground via a capacitor or other electronic component.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: July 3, 2012
    Assignee: Hypercom Corporation
    Inventor: Chris Henry
  • Publication number: 20120146958
    Abstract: A position indicator is provided for use with a position detecting sensor that carries out position detection by detecting a change in capacitance. The position indicator includes: a first electrode configured to receive an alternating-current (AC) signal from the position detecting sensor; a signal enhancing processing circuit configured to subject the AC signal received via the first electrode to determined signal enhancing processing; and a second electrode different from the first electrode and configured to be supplied with a signal output from the signal enhancing processing circuit. An enhanced signal having a determined correlation with the AC signal received via the first electrode from the position detecting sensor is formed while the enhanced signal is sent out to the position detecting sensor via the second electrode.
    Type: Application
    Filed: January 7, 2011
    Publication date: June 14, 2012
    Applicant: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Masaki Yagi
  • Patent number: 8199132
    Abstract: A position indicator is provided for use with a position detecting sensor that carries out position detection by detecting a change in capacitance. The position indicator includes: a first electrode configured to receive an alternating-current (AC) signal from the position detecting sensor; a signal enhancing processing circuit configured to subject the AC signal received via the first electrode to determined signal enhancing processing; and a second electrode different from the first electrode and configured to be supplied with a signal output from the signal enhancing processing circuit. An enhanced signal having a determined correlation with the AC signal received via the first electrode from the position detecting sensor is formed while the enhanced signal is sent out to the position detecting sensor via the second electrode.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: June 12, 2012
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuo Oda, Masaki Yagi
  • Patent number: 8184102
    Abstract: Touch sensor methods, devices and systems are disclosed. One embodiment of the present invention pertains to a method comprising monitoring a finger movement along a touch sensing surface based on position data of a finger touching the touch sensing surface, where the position data is obtained by locating a position of a force applied by the finger in a coordinate of the touch sensing surface. In addition, the method comprises generating direction data associated with the finger movement if the finger movement travels for more than a threshold distance. Furthermore, the method comprises determining a finger gesture which corresponds to the finger movement using a lookup table having multiple preconfigured finger gestures based on the direction data.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: May 22, 2012
    Assignee: Cypress Semiconductor Corporation
    Inventors: Tony Park, Luther Lu, Nelson Chow
  • Patent number: 8184109
    Abstract: A dielectric (16) is housed in a chassis (15) having an opening (22) and a main face portion (23). The dielectric (16) is formed with a hole (30) extending from a first surface (28) to a second surface (29) thereof, and the main face portion (23) of the chassis (15) is formed with a through-hole (25). A conductive pin (17) is inserted into the hole (30) and the through-hole (25) with one end portion thereof projected to the outside of the chassis (15) from the main face portion (23). Further, the electrode portion (32) of the lead electrode (18) is interposed between the second surface (29) of the dielectric (16) and the main face portion (23) of the chassis (15), and a terminal piece (33) of the lead electrode (18) is projected toward the outside from the main face portion (23) of the chassis (15). Further, a conductive elastic member (19) is arranged to approach the first surface (28) of the dielectric (16).
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: May 22, 2012
    Assignee: Wacom Co., Ltd.
    Inventors: Yasuyuki Fukushima, Hiroyuki Fujitsuka
  • Patent number: 8183476
    Abstract: In a position detection device which detects a position indicated by a position indicator, improvements are made such that signals can be received precisely and reliably even at the end portions of the detectable region. In a tablet 20 which detects the position of an input pen 10 by means of electromagnetic inductive action with the input pen 10, a shield plate is positioned below a sensor substrate having a plurality of coils, and a shield layer of a ferromagnetic material is provided to overlap with the shield plate.
    Type: Grant
    Filed: April 25, 2006
    Date of Patent: May 22, 2012
    Assignee: Wacom Co., Ltd.
    Inventors: Masamitsu Fukushima, Toshihiko Horie
  • Patent number: 8180073
    Abstract: A system for creating and manipulating digital media integrates a graphics tablet, a touchpad, and a synthesizer chipset. The graphics tablet includes a tablet surface, a grid of wires located under the tablet surface, and a graphics tablet chipset. The graphics tablet chipset includes an interface operably connected to the grid of wires for sending power to a stylus when the stylus is positioned over the tablet surface and receiving a signal from the stylus used to determine a position of the stylus with respect to the tablet surface. The touchpad is positioned on the tablet surface such that the touchpad also detects the position of the stylus simultaneously with the graphics tablet. The synthesizer chipset creates digital sounds based on input from the touchpad. The position of the stylus is output to a graphics tablet chipset output, and the digital sounds are output to a synthesizer chipset sound output.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: May 15, 2012
    Inventor: Mark J. Grote
  • Patent number: 8164582
    Abstract: A method for using a touch display system comprises defining local distortion zones within regions of a touchscreen. Each of the local distortion zones has an associated calibration touch point and a target. Coordinates of a user touch point are distorted within a first local distortion zone based on a location of the user touch point within the first local distortion zone.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: April 24, 2012
    Assignee: Tyco Electronics Corporation
    Inventors: Kenneth J. North, Jeffery L. Bahr, Joel C. Kent
  • Patent number: 8159474
    Abstract: An untethered stylus is configured to cooperate with a location sensing device that generates a drive signal. The stylus includes transceiver circuitry disposed in a housing, which is configured to receive the drive signal and transmit a stylus signal for reception by the location sensor. Energy circuitry is disposed in the housing and energized by the drive signal. A reference frequency generator, disposed in the housing and coupled to the transceiver circuitry and energy circuitry, is configured to generate a number of reference frequencies based on a source frequency of the drive signal, the reference frequencies indicative of a number of stylus states and synchronized to the source frequency of the drive signal. The transceiver circuitry is configured to mix the reference frequencies with the stylus signal.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: April 17, 2012
    Assignee: 3M Innovative Properties Company
    Inventor: Karl P. Hauck
  • Patent number: 8134542
    Abstract: An untethered stylus is configured to cooperate with a location sensor that generates a magnetic field. The stylus include a housing having a tip and a shield. Circuitry, including a power circuit, is provided in the housing. An antenna arrangement provided at the housing includes multiple coil resonant circuits each tuned to a different frequency of the magnetic field. A first coil resonant circuit energizes the power circuit in response to the magnetic field, which provides DC power to the circuitry. One or more other coil resonant circuits are coupled between the tip and shield of the housing to define separate channels for communicatively coupling the stylus tip and the location sensor. An information signal communicated between the stylus tip and the location sensor is substantially unperturbed during provision of DC power by the first coil resonant circuit.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 13, 2012
    Assignee: 3M Innovative Properties Company
    Inventors: Kathy L. Hagen, Albert H. Libbey
  • Patent number: 8130213
    Abstract: The present disclosure relates to a stylus and a method of manufacturing the same. The stylus is configured to select one of plural pieces of content installed in advance in a communication terminal and indicate an associated operation of the selected piece of content to be performed by touching the selected piece of content with the stylus.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: March 6, 2012
    Assignees: XG Solutions, LLC, Seoh Technology Co., Ltd.
    Inventors: Jong Woong No, Dongsik Kim
  • Patent number: 8125469
    Abstract: A passive stylus for capacitive sensors comprises a tip and a shaft. The tip is configured to couple electrically with a capacitive sensing device and to couple physically and electrically with the stylus shaft. The tip comprises a contact surface, a support region, and a flexible region. The contact surface is configured to contact a device surface associated with the capacitive sensing device. The flexible region is disposed between the contact surface and the support region. The flexible region comprises a hardness gradient. The support region is configured to provide structural support to the flexible region.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: February 28, 2012
    Assignee: Synaptics, Inc.
    Inventors: Massoud Badaye, Richard R. Schediwy
  • Publication number: 20120043142
    Abstract: A method and apparatus to couple a piece of electret material to a touch-sensor device stylus, where the electret material emits an electrostatic field to be sensed by a touch-sensor device.
    Type: Application
    Filed: May 9, 2008
    Publication date: February 23, 2012
    Inventor: Edward L. Grivna
  • Patent number: 8120593
    Abstract: A method of positioning a coordinate suitable for a touch panel includes following steps. When a touch event occurs, the touch panel generates a corresponding detection coordinate periodically until the touch event ends. When the touch event occurs, the detection coordinate generated by the touch panel is sequentially stored. The touch event is ignored until the number of coordinates generated by the touch panel is greater than or equal to N, and N is a positive integer. When the number of coordinates generated by the touch panel is greater than or equal to N, a touch coordinate corresponding to the touch event is generated according to the last generated N detection coordinates. The above-mentioned step of generating the touch coordinate is repeated according to a cycle of generating the detection coordinate by the touch panel so as to renew the touch coordinate until the touch event ends.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: February 21, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ming-Ta Hsieh, Chien-Ming Lin, Chih-Chung Chen, Hsueh-Fang Yin, Chia-Lin Liu
  • Patent number: 8094140
    Abstract: A position input device is provided in which signals are transmitted from a position indicator, and signals transmitted from the position indicator are received by a position detector device. According to certain embodiments, an electrical double-layer capacitor, a charging circuit which charges the electrical double-layer capacitor, and a power transmission unit which relays and supplies to the charging circuit power supplied from a power supply unit external to the position indicator, are provided in the position indicator. In other embodiments the position input device has a built-in power supply unit, transmitting units, and a control unit for switching the transmitting units between energized and de-energized states. Also provided are position input systems and computer systems including the position input device, and methods of operating the position input device and the systems.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: January 10, 2012
    Assignee: Wacom Co., Ltd.
    Inventors: Yuji Katsurahira, Masaki Matsubara
  • Patent number: 8081172
    Abstract: A retention member holds a tip of a pen received in an inner space of a unit body through an opening. A narrowed path member is placed within the inner space at a position between a large-diameter member of the pen and the opening, when the retention member holds the pen. The large-diameter member expands outward from the outer peripheral surface of the pen by a predetermined amount. The narrowed path member contacts the large-diameter member when the pen is released from the retention member, and creates enough interference to prevent the pen from falling out of the unit body, but otherwise allows the pen to be drawn out of the opening.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: December 20, 2011
    Assignee: Fujitsu Limited
    Inventors: Nagahisa Chikazawa, Masahiko Kyouzuka
  • Patent number: 8077160
    Abstract: Pre-stored no-touch or no-hover (no-event) sensor output values can initially be used when a sensor panel subsystem is first booted up to establish an initial baseline of sensor output values unaffected by fingers or other objects touching or hovering over the sensor panel during boot-up. This initial baseline can then be normalized so that each sensor generates the same output value for a given amount of touch or hover, providing a uniform response across the sensor panel and enabling subsequent touch or hover events to be more easily detected. After the initial normalization process is complete, the pre-stored baseline can be discarded in favor of a newly captured no-event baseline that may be more accurate than the pre-stored baseline due to temperature or other variations.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: December 13, 2011
    Assignee: Apple Inc.
    Inventors: Brian Richards Land, Wayne Carl Westerman, Steve Porter Hotelling
  • Patent number: 8049732
    Abstract: A touch surface device having improved sensitivity and dynamic range is disclosed. In one embodiment, the touch surface device includes a touch-sensitive panel having at least one sense node for providing an output signal indicative of a touch or no-touch condition on the panel; a compensation circuit, coupled to the at least one sense node, for generating a compensation signal that when summed with the output signal removes an undesired portion of the output signal so as to generated a compensated output signal; and an amplifier having an inverting input coupled to the output of the compensation circuit and a non-inverting input coupled to a known reference voltage.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: November 1, 2011
    Assignee: Apple Inc.
    Inventors: Steve Porter Hotelling, Brian Richards Land
  • Patent number: 8040329
    Abstract: An untethered device, configured to inductively couple to a source device, includes a tunable resonant circuit having a resonance frequency and configured to generate a supply voltage for the untethered device in response to a varying magnetic field produced by the source device. The tunable resonant circuit includes an inductive coil comprising a center tap and a capacitive circuit coupled to the inductive coil. The capacitive circuit includes an anti-series arrangement of varactor diodes that behave as a capacitance when placed in reverse bias. A frequency control circuit is coupled to the tunable resonant circuit and includes a control voltage source coupled to the center tap of the inductive coil. The control voltage source produces a control signal to place the varactor diodes in reverse bias and to change the capacitance of the capacitive circuit, thereby effecting a change in the resonance frequency of the tunable resonant circuit.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: October 18, 2011
    Assignee: 3M Innovative Properties Company
    Inventor: Martin J. Vos
  • Patent number: 8022317
    Abstract: An X-Y digitizer system is described for embedding within a host device, such as a tablet PC, a mobile telephone, a personal digital assistant or the like. The digitizer is configurable so that it can detect and track the position of different types of position indicator. The digitizer also includes novel digitizer windings and novel excitation circuitry for energizing the windings.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: September 20, 2011
    Assignee: Synaptics (UK) Limited
    Inventor: David Thomas Eliot Ely
  • Publication number: 20110192658
    Abstract: A position pointer is provided, which includes a housing having an opening, a bar-like rod disposed in the housing such that one end thereof projects from the opening, and a variable capacitor having a capacitance value which varies in response to pressure applied thereto through the rod. The capacitor includes a dielectric member having a first face portion opposite a second face portion, a first electrode section disposed on the first face portion of the dielectric member, a conductive member facing the second face portion of the dielectric member and forming a second electrode section when brought into contact with the second face portion of the dielectric member, and an elastic member coupled with the conductive member and adapted for biasing the conductive member away from the second face portion. A contact area between the conductive member and the second face portion varies depending on the pressure applied thereto through the rod.
    Type: Application
    Filed: February 10, 2010
    Publication date: August 11, 2011
    Applicant: WACOM CO., LTD.
    Inventors: Yasuyuki Fukushima, Hiroyuki Fujitsuka
  • Publication number: 20110162894
    Abstract: A stylus for entering data on a touch-screen computing device. The stylus includes a conductive tip that creates capacitive coupling between the stylus and the touch-screen of the computing device. The conductive tip may also be heated and include a passive or active heating element. Additionally, a dock for the stylus may be provided for the computing device to recharge the battery of the stylus and also provide storage for the stylus when not in use.
    Type: Application
    Filed: January 6, 2010
    Publication date: July 7, 2011
    Applicant: Apple Inc.
    Inventor: Douglas Weber
  • Patent number: 7956851
    Abstract: An untethered device is configured to inductively couple to a source device. The source device includes a driver circuit configured to generate a varying magnetic field and comprising a drive coil circuit. A phase detector is coupled to the driver circuit and configured to detect a phase of an input impedance of the driver circuit in response to the source device inductively coupling with the resonant circuit of the untethered device. A controller is coupled to the phase detector and the driver circuit, and is configured to adjust a frequency of a source voltage applied to the driver circuit in response to an output signal of the phase detector. The controller adjusts the source voltage frequency so that the phase of the input impedance as indicated by the output signal of the phase detector is substantially zero.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: June 7, 2011
    Assignee: 3M Innovative Properties Company
    Inventor: Martin J. Vos
  • Publication number: 20110115753
    Abstract: A position indicator for use in a pen tablet device includes a coil for emitting a position indicating signal. The coil includes: a first conductive wire wound from a distal end portion thereof to a proximal end portion thereof in a predetermined rotational direction; and a second conductive wire wound from a proximal end portion thereof to a distal end portion thereof in the predetermined rotational direction, wherein the first conductive wire and the second conductive wire are connected to each other at the proximal end portions thereof, and the wound first conductive wire and the wound second conductive wire are disposed alternately adjacent to each other.
    Type: Application
    Filed: October 26, 2010
    Publication date: May 19, 2011
    Applicant: WACOM CO., LTD.
    Inventor: Yuji Katsurahira
  • Patent number: 7940251
    Abstract: A first planar input unit includes a transparent first substrate and a transparent second substrate that are stacked on each other. On an electrode formation surface of the first substrate, transparent Y-driving electrodes and transparent shielding layers are formed. On an electrode formation surface of the second substrate, X-driving electrodes and first detection electrodes are formed. At the rear of the first substrate, a display unit, such as a liquid crystal panel, is provided. Since the shielding layers are located between the display unit and the first detection electrodes, a change in the potential of the first detection electrodes is prevented from being adversely affected by noise emitted from the display unit.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: May 10, 2011
    Assignee: Alps Electric Co., Ltd.
    Inventor: Junji Hashida
  • Patent number: 7898532
    Abstract: A force sensor particularly suited for use in an electronic stylus that senses the contact force on its nib for recording pen strokes and handwriting recognition. The sensor has a housing for a load bearing member for receiving an input force to be sensed and associated circuitry for converting the input force into an output signal indicative of the input force. A coupling transmits the input force to the load bearing member and, a compressible reservoir containing dilatant fluid mounted between the housing and the coupling restricts the input force to the load bearing member caused by shock loading to the coupling. This protects the force sensor from damage by sharp impact loads such as dropping the stylus on its nib.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: March 1, 2011
    Assignee: Silverbrook Research Pty Ltd
    Inventors: Paul Lapstun, Kia Silverbrook
  • Patent number: 7868876
    Abstract: An untethered device is configured to inductively couple to a source device. The source device includes a driver circuit configured to generate a varying magnetic field and comprising a drive coil circuit. A phase detector is coupled to the driver circuit and configured to detect a phase of an input impedance of the driver circuit in response to the source device inductively coupling with the resonant circuit of the untethered device. A controller is coupled to the phase detector and the driver circuit, and is configured to adjust a frequency of a source voltage applied to the driver circuit in response to an output signal of the phase detector. The controller adjusts the source voltage frequency so that the phase of the input impedance as indicated by the output signal of the phase detector is substantially zero.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: January 11, 2011
    Assignee: 3M Innovative Properties Company
    Inventor: Martin J. Vos
  • Patent number: 7830156
    Abstract: A method for measuring a velocity of a conductor pressing on a capacitive sensor. The method includes: sampling a capacitance of a sensing electrode at each preset time; providing a threshold value; and determining the velocity of the conductor pressing on the capacitive sensor according to a specific period, wherein the specific period is defined as a period of time ranging from the time when the capacitance reaches the threshold value to the time when the capacitance reaches a peak value.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: November 9, 2010
    Assignee: Generalplus Technology Inc.
    Inventors: Tung-Tsai Liao, Li Sheng Lo
  • Patent number: 7825911
    Abstract: A touch sensor includes a contact sensor and a pressure sensor. The contact sensor includes a first electrode and a first switching element connected to the first electrode, and detects a change in an electric potential when an object contacts a surface. The pressure sensor includes a second electrode and a second switching element connected to the second electrode, and detects a change in a pressure when an object depresses the surface. The touch sensor includes a plurality of the contact sensors and a plurality of the pressure sensors disposed regularly in an array.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: November 2, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takeshi Sano, Keiichi Kuramoto, Hiroyuki Fujii, Kenichiro Wakisaka
  • Patent number: 7812268
    Abstract: An X-Y digitizer system is described for embedding within a host device, such as a tablet PC, a mobile telephone, a personal digital assistant or the like. The digitizer is configurable so that it can detect and track the position of different types of position indicator. The digitizer that is described also includes novel digitizer windings and novel excitation circuitry for energizing the windings.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: October 12, 2010
    Assignee: Synaptics (UK) Limited
    Inventor: David Ely
  • Patent number: 7773076
    Abstract: Motion of a writing instrument is tracked from sensors located in the vicinity. The signals generated from the sensors are processed and used in a wide variety of ways.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: August 10, 2010
    Assignee: CandleDragon Inc.
    Inventors: Arkady Pittel, Ilya Schiller, Garry Shleppi, Vladimir V. Subach, Andrew M. Goldman, Simon Selitsky, Mario A. Stein
  • Publication number: 20100170726
    Abstract: An electronic stylus emits an excitation signal to apply to a trace of a capacitive touchpad module near a touch point when the electronic stylus touches the capacitive touchpad module, so as to change a waveform of a charging/discharging signal in the trace, and depending on the waveform variation, the capacitive touchpad module can identify the touch point.
    Type: Application
    Filed: January 4, 2010
    Publication date: July 8, 2010
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: I-HAU YEH, CHI-TEIN YEH, TSUN-MIN WANG, CHUN-CHUNG HUANG, CHUNG-HAN CHENG, HUNG-MING HUANG
  • Patent number: 7705837
    Abstract: A computer tablet includes a wireless receiver, and a pen is configured to be manipulated by a person to ride against the computer tablet and thereby provide input to the computer tablet. The pen includes a wireless transmitter. A processor associated with the computer tablet outputs an alarm when a signal from the transmitter of the pen is not sensed by the computer tablet within a time period.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: April 27, 2010
    Assignee: Lenovo (Singapore) Pte. Ltd.
    Inventors: Howard Jeffrey Locker, Daryl Carvis Cromer, Robert Jacob Herman, Thomas R. Hildner, Jeffrey Michael Samitt
  • Patent number: 7696444
    Abstract: Disclosed is a device for varying capacitance which pertains to the field of application of electronic devices and components. The technical essentials of the present invention lie in that: two dielectrics are disposed in parallel with an isolation layer interposed therebetween; the two dielectrics each are connected to an electrode at the same one end face thereof; the other end face of each of the two dielectrics is provided with an elastic conductive pad; a gasket is provided between the two dielectrics and the elastic conductive pads. The relative position and compressed area between the elastic conductive pads and the dielectrics vary according to the magnitude of the external force so that the capacitance between the electrodes of the dielectrics is varied accordingly within a certain range.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: April 13, 2010
    Assignee: Hanwang Technology Co., Ltd.
    Inventors: Yingjian Liu, Honggang Wang, Bojun Song, Liang Zhao
  • Publication number: 20100006350
    Abstract: Methods and apparatus adapted to ensure that contact from a stylus will be detected on a low resolution touch sensor panel irrespective of the location of the region of contact upon the touch surface. In some embodiments, a metallic or otherwise conductive disk may be attached to one end of the stylus. The disk may be sized so as to guarantee sufficient electrical interaction with at least one sensory element of the touch sensor panel. In some embodiments, the stylus may be powered so as to provide a stimulus signal to the capacitive elements. Optionally, one or more force and/or angle sensors disposed within the stylus can supply additional data to the touch panel.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 14, 2010
    Inventor: John G. Elias
  • Patent number: 7643013
    Abstract: A capacitive input device, capable of stably adjusting the sensitivity of a counter electrode to improve the operability of the input device, and of improving the appearance of an electric apparatus is provided. In the input device, a conductive material is arranged between a counter electrode and an inner surface of a casing.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: January 5, 2010
    Assignee: Alps Electric Co., Ltd.
    Inventors: Masahiro Soma, Kunio Sato
  • Publication number: 20090283342
    Abstract: A touch pad module to implement user input functions to an electronic device is disclosed. The touch pad module includes a sensor layer which, when used in conjunction with an insulative layer and contiguous conductive layer enable the touch pad module to sense both finger and stylus input data to the electronic device.
    Type: Application
    Filed: July 23, 2009
    Publication date: November 19, 2009
    Applicant: SYNAPTICS INCORPORATED
    Inventors: Richard Robert Schediwy, Federico Faggin
  • Patent number: 7612767
    Abstract: A pen or stylus for use with a finger activated computer touchpad uses capacitively coupled voltage signals to simulate the capacitive effect of a finger on the touchpad. In addition, the pen has buttons that can be utilized to capacitively couple control signals to the touchpad that are interpreted by application software as specific user-defined inputs. The pen has a conductive tip that is placed into contact with the touchpad. By biasing the touchpad electrodes with a properly timed voltage signal, the pen alters the charging time of the electrodes in the touchpad. This alteration in charging time is interpreted by the touchpad as a change in capacitance due to the presence of a user's finger. Thus, the pen can be used with touchpads that were designed to only detect finger movements.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: November 3, 2009
    Assignee: Griffin Technology, Inc.
    Inventors: Paul Griffin, Cameron Boone
  • Publication number: 20090260900
    Abstract: An untethered electrostatic pen/stylus for use with capacitive touch sensors, described herein, allows for a single device like the iPhone to receive input via both finger touches and a stylus. Stylus input is more precise for various uses including, for example, text input and drawing input.
    Type: Application
    Filed: April 16, 2008
    Publication date: October 22, 2009
    Inventor: Michael J. Ure
  • Patent number: 7605805
    Abstract: An electrical touch sensor is provided. The electrical touch sensor includes: a touch detection part having at least one touch pad and generating a first signal having a same delay time regardless of whether the object is in contact with the touch pad and a second signal having a varied delay time according to whether the object is in contact with the touch pad; and a contact signal generator generating a contact signal in response to the delay time-difference between the first and second signals. Therefore, it is possible to increase operation reliability by precisely determining whether the object is in contact with the pad, when the object has charge accumulation characteristics more than a certain level, although its conductive is insufficient. In addition, the electrical touch sensor can determine whether the object is in contact with the pad using only one pad to reduce a layout area of a product.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: October 20, 2009
    Assignee: Atlab Inc.
    Inventors: Deok-Young Jung, Jae-Surk Hong, Young-Ho Shin
  • Publication number: 20090211821
    Abstract: This invention provides a capacitive stylus pen including a conductive plate, a joint and a conductive pen body is provided, wherein the joint is connected between the conductive plate and the conductive pen body such that the conductive pen body could move around the conductive plate. In another embodiment, a capacitive stylus pen includes a conductive pen body and a universal joint connected to the conductive pen body, wherein the universal joint has at least a quasi-flat surface such that the universal joint has both functions of the conductive plate and the joint mentioned above. Thus, the capacitive stylus pens mentioned above both provide convenience to use by position input.
    Type: Application
    Filed: April 11, 2008
    Publication date: August 27, 2009
    Applicant: J TOUCH CORPORATION
    Inventors: YU-CHOU YEH, KUO-YI YEN, YU-HONG YEN, YU-CHUNG HUANG, CHU-CHIA HUANG
  • Patent number: 7570253
    Abstract: A pen-type computer includes a pen barrel, a sensor, a primary processor, and a storage device. The pen barrel has a writing tip. The sensor is disposed in the pen barrel, sensing movement of the writing tip and generating a tracking signal corresponding to the movement of the writing tip. The primary processor is disposed in the pen barrel, encoding the tracking signal into data and storing the data in the storage device.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: August 4, 2009
    Assignee: Fortemedia, Inc.
    Inventor: Yen-Son Paul Huang
  • Publication number: 20090114459
    Abstract: A dielectric (16) is housed in a chassis (15) having an opening (22) and a main face portion (23). The dielectric (16) is formed with a hole (30) extending from a first surface (28) to a second surface (29) thereof, and the main face portion (23) of the chassis (15) is formed with a through-hole (25). A conductive pin (17) is inserted into the hole (30) and the through-hole (25) with one end portion thereof projected to the outside of the chassis (15) from the main face portion (23). Further, the electrode portion (32) of the lead electrode (18) is interposed between the second surface (29) of the dielectric (16) and the main face portion (23) of the chassis (15), and a terminal piece (33) of the lead electrode (18) is projected toward the outside from the main face portion (23) of the chassis (15). Further, a conductive elastic member (19) is arranged to approach the first surface (28) of the dielectric (16).
    Type: Application
    Filed: October 24, 2008
    Publication date: May 7, 2009
    Applicant: WACOM CO., LTD.
    Inventors: Yasuyuki Fukushima, Hiroyuki Fujitsuka
  • Publication number: 20090115745
    Abstract: A handheld electronic device comprising a main body, a stylus and a non-contact sensor is provided. The main body has a containing slot, and the stylus having a sensing region is suitable for being inserted into the containing slot. The non-contact sensor is disposed beside the containing slot. The non-contact sensor outputs a sensing signal for identifying the position of the stylus when the stylus moves in the containing slot and the sensing region of the stylus passes the non-contact sensor. By detecting the position of the stylus in a non-contact manner, the reliability and the lifetime of the handheld electronic device are improved, and a higher sensing precision is also provided.
    Type: Application
    Filed: May 29, 2008
    Publication date: May 7, 2009
    Applicant: HIGH TECH COMPUTER, CORP.
    Inventors: I-Cheng Chuang, Yu-Jing Liao, Ying-Yen Cheng