Capacitive Or Inductive Stylus Patents (Class 178/19.03)
  • Patent number: 6515654
    Abstract: A touch-type pointing device with wireless input capability is disclosed, which includes a touch unit and a sensing pen. The touch unit has a transparent electrode and a control circuit connected to the transparent electrode for detecting a variance of impedance in the transparent electrode to obtain a signal representing a coordinate point, and transmitting and receiving signals. The sensing pen has a plurality of switches, each being closed to form a LC loop for transmitting signals in response to the signals from the touch unit.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: February 4, 2003
    Assignee: Taiwan Regular Electronics
    Inventor: Cheng-Yuan Liao
  • Patent number: 6479768
    Abstract: Disclosed is a method and a device for obtaining precision data acquisition via hand writing/drawing without requiring the use of a transducer pad, the screen of a monitor, or a scanner. As such, writing/drawing can be applied to almost all kinds of material surfaces, including books, fabrics, labels, etc., with or without showing an ink mark. Graphic and text images can all be effectively processed. Data acquisition function is accomplished by continuously monitoring the orientation of a magnet ball installed at the tip of a magnetomechanical ball-pen device whose outlook resembles a regular pen. When powered by a battery with self data-storage capability, the disclosed method and device allow for a new class of instrumentations that data acquisition function is carried out at the same time whenever hand writing/drawing is applied in the normal manner.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: November 12, 2002
    Inventor: Hoton How
  • Patent number: 6476799
    Abstract: An apparatus is provided for the wireless capture of coordinate-shift information. The apparatus includes a pulse generator that generates a pulse signal and simultaneously distributes the pulse signal into a first signal along the first path and a second signal along the second path. The apparatus further includes a working area defined by a plurality of crossing X-axis signal lines and Y-axis signal lines, and at least one coil surrounding the working area for generating a magnetic field. The apparatus also includes a scanning circuit coupled to the working area, and a synchronic determination circuit coupled to the pulse generator and the scanning circuit for receiving the first and second signals, and for determining the time delay between the receipt of the first and second signals. The apparatus further includes a signal processing circuit coupled to the scanning circuit and the synchronic determination circuit.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: November 5, 2002
    Assignee: KYE Systems Corp.
    Inventors: Jeffrey Lee, Po-Hsun Hsien, Kenny Chien
  • Patent number: 6469696
    Abstract: There is provided a position detector including a member having a surface and a plurality of vertically and horizontally arranged antennas; a controller for sequentially driving the vertically arranged antennas in vertical positive and vertical negative directions, and for sequentially driving the horizontally arranged antennas in horizontal positive and horizontal negative directions so that the antennas sequentially radiate radio waves; a receiver for receiving the sequentially radiated radio waves on the surface of the member; and a detector for detecting the position of the receiver on the surface of the member based on the levels of the received radio waves.
    Type: Grant
    Filed: October 12, 1999
    Date of Patent: October 22, 2002
    Assignee: Sega Enterprises, Ltd.
    Inventors: Yoshifumi Ishimura, Hirotsugu Tomizawa
  • Patent number: 6441810
    Abstract: The invention relates to the transmission of telemetry data from a stylus to a host computer via a serial, asynchronous data channel. The telemetry data is encoded into code-words using a specially selected error detecting or error correcting code, the code-words are transmitted from the stylus in a continuous, homogeneous data stream without the use of framing delimiters between adjacent code-words, and the code-words are then received by the host computer which separates the code-words according to the unique characteristics of the selected code. The code may be chosen based on both the error detection/correction requirements of the system and the probability that the code will create invalid intermediate code matches between consecutive back-to-back code-words. In one embodiment, the invention provides a synchronization scheme which greatly reduces the probability that invalid intermediate code matches will be recognized in the host computer as validly transmitted code-words.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: August 27, 2002
    Assignee: LSI Logic Corporation
    Inventors: Steven K. Skoog, Gregory A. Tabor
  • Patent number: 6392638
    Abstract: The present invention discloses an information processing apparatus comprising a display device to display images and a touch panel device to output signals for a depressing position and a depressing pressure. The images of the icons that are displayed are changed depending on the output from the touch panel device. The composite icon display control is determined for the depressing pressure level information as the comparison result of the depressing pressure and reference depressing pressure and depressing position change information as the monitoring result of depressing position in addition to the depressing position information of the touch panel device. When the touch panel is depressed with a weak pressure, the icon corresponding to the depressing position is displayed in the highlight display mode.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: May 21, 2002
    Assignee: Sony Corporation
    Inventors: Mitsuru Hanajima, Jochiku Muraoka
  • Patent number: 6392639
    Abstract: An arrangement for safely keeping a stylus as the input unit in the housing of a palm-sized computer contains a guide opening formed in one side of the housing, a stylus holding channel extending from the guide opening towards the inside of the housing for holding the stylus inserted through the guide opening, the cross section of the stylus holding channel being designed to snugly receive the stylus, at least a groove formed on the circumference of the stylus, a resilient strip formed integrally with the inside of the stylus holding channel by cutting the wall of the stylus holding channel, the resilient strip elongated in the direction of the stylus holding channel and having a free end, and a hook projected from the free end of the resilient strip towards the inside of the stylus holding channel, wherein the hook may engage the groove to safely keep the stylus inserted into the stylus holding channel.
    Type: Grant
    Filed: March 31, 1999
    Date of Patent: May 21, 2002
    Assignee: SamSung Electronics, Co., Ltd.
    Inventors: Kwang-Youb Lee, Jung-Woo Cha
  • Patent number: 6362440
    Abstract: A flexibly interfaceable portable computing device includes a display coupled to a processor, which is coupled or selectively coupled to either or both of a keyboard and a recording unit. The display and the keyboard provide a first user interface to the processor. The recording unit is superimposable with a removable markable surface. A stylus allows user marking on the markable surface. The stylus provides a stroke signal and a stroke mark. The recording unit, the markable surface, and the stylus provide a second user interface to the processor. Optionally, the display also contributes to providing the second user interface to the processor. Switching among viewing modes for the display, and synchronization of information between the processor and a processor of the recording unit are also provided. A casing can enfold the display, the keyboard, and the recording unit to form a relatively slim profile.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: March 26, 2002
    Assignee: International Business Machines Corporation
    Inventors: John Peter Karidis, Krishna Sundaram Nathan, Ronald Alan Smith, Robert Edward Steinbugler
  • Patent number: 6326565
    Abstract: A transmitter device is disclosed for use with a conventional pen in which the ultrasound transmitter is a cylindrical element lying coaxial with the pen and adjacent to its tip, and a jointed eraser structure. Conventional triangulation techniques are used to track the position and motion of a writer or eraser. An encoding facility associated with the pen provides the ability to distinguish whether the pen is used for marking or an as erasing implement, as well as determining the nature or character of written line width or eraser swath. A data stream thus generated can be used in a variety of ways, such as for example, to feed information into the memory of a digital computer, and/or to feed information for transmission to remote stations.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: December 4, 2001
    Assignee: Electronics for Imaging, Inc.
    Inventors: Rafi Holtzman, Isaac Zloter
  • Patent number: 6300580
    Abstract: A presentation board digitizer system for large boards preferably employs at least three spaced-apart ultrasound receivers assemblies. A current position of an ultrasound transmitter is assigned as a weighted centroid of time of-flight position measurements based on at least two pairs of receiver assemblies. The weighting used varies as a function of the position of the transmitter across the board. A preferred structure of an ultrasound receiver assembly for use in the system employs a pair of ultrasound receivers arranged side-by-side in a line perpendicular to the surface of the presentation board. The receivers are connected so as to generate a total output signal corresponding to the instantaneous sum of the ultrasound signals received at each, such that the receiver assembly is most sensitive to ultrasound signals incident from a plane adjacent to the presentation board.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: October 9, 2001
    Assignee: Electronics for Imaging, Inc.
    Inventors: Gideon Shenholz, Yitzhak Zloter
  • Patent number: 6265676
    Abstract: A method and corresponding system for tracking variations in distance D calculated from time-of-flight measurements of a sequence of pulses of a pressure wave oscillation from a transmitter to a receiver identifies a state of synchronous operation by obtaining at least two time-of-flight measurements derived from successive pressure wave pulse which satisfy given synchronicity criteria. Successive time-of-flight measurements are then monitored to identify a shifted time-of-flight measurement which varies by at least half of the wave period from a predicted time-of-flight value calculated from a number of preceding time-of-flight measurements. A shift factor is then identified corresponding to an integer multiple of the wave period by which the shifted time-of-flight measurement must be corrected to obtain a corrected time-of-flight measurement falling within half of the wave period from the predicted time-of-flight value.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: July 24, 2001
    Assignee: Electronics for Imaging, Inc.
    Inventors: Zahi Zloter, Gideon Shenholz, Ron Serber
  • Publication number: 20010006369
    Abstract: A low cost x-y digitising system is described for use in consumer electronic devices, such as portable digital assistants, mobile telephones, web browsers and the like. The digitizer includes a resonant stylus, an excitation winding for energising the resonant stylus and a set of sensor windings for sensing the signal generated by the stylus, from which the x-y position of the stylus is determined. The excitation signals applied to the excitation winding are designed to reduce the power drawn from the power supply which makes the digitising system particularly suited to battery operation.
    Type: Application
    Filed: February 6, 2001
    Publication date: July 5, 2001
    Inventor: David T.E. Ely
  • Patent number: 6246393
    Abstract: A wireless type coordinate reading apparatus, in which a coordinate value of a position indicated by a coordinate indicator can be calculated in high resolution, the coordinate indicator can be made simple, and further widths of a pen shaft and a pen tip can be narrowed is disclosed. A coordinate reading apparatus is constituted by AC magnetic field generating means for generating an AC magnetic field; a coordinate indicator having a magnetic material for producing a magnetic pulse caused by the Large Barkhausen effect when the magnetic material is positioned in the magnetic field generated from the AC magnetic field generating means; magnetic field detecting means for detecting the magnetic pulse caused by the Large Barkhausen effect; and coordinate calculating means connected to the magnetic field detecting means, for calculating a position indicated by the coordinate indicator in response to a signal produced based upon the magnetic pulse detected by the magnetic field detecting means.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: June 12, 2001
    Assignee: Seiko Instruments Information Devices Inc.
    Inventors: Toshiaki Watanabe, Yoshiyuki Morita
  • Patent number: 6229102
    Abstract: A small-sized pen-shaped input apparatus precisely detects handwriting input. The apparatus compensates for the effects of the inclination of the pen-shaped input apparatus. An initial inclination angle calculating section calculates the initial value of the inclination angle of a pen shaft in a gravity coordinate system. The inclination angle variation calculating section calculates a variation value of the inclination angle of the pen shaft. A handwriting inclination angle calculating section calculates the inclination angle of the pen shaft when writing. A coordinates conversion calculating section converts the coordinate system of the acceleration from the pen shaft coordinate system to the gravity coordinate system. A movement amount calculating section calculates the movement direction and the movement distance of the pen's tip end. Finally, a handwriting detecting section detects a state of handwriting or non-handwriting.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: May 8, 2001
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuhiro Sato, Takao Inoue, Etsuko Fujisawa, Takashi Kitaguchi, Toshiyuki Furuta, Norihiko Murata, Mitsuru Shingyouchi
  • Patent number: 6222522
    Abstract: A position sensor is used in conjunction with one or more batons, each baton having a transmitter that transmits a distinct radio frequency signal at a position in space. The position sensor determines the current position of each baton transmitter in terms of X, Y, and Z coordinates. The position sensor includes a tablet having a flat support member, with at least two pairs of electrodes coupled to the flat support member. Each of the electrodes is a separate antenna. A first pair of the electrodes is shaped so that the amount of capacitive coupling between each baton transmitter and the first pair of electrodes corresponds to the position of the baton transmitter with respect to the X axis. A second pair of the electrodes is shaped so that the amount of capacitive coupling between each baton transmitter and the second pair of electrodes corresponds to the position of the baton transmitter with respect to the Y axis.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: April 24, 2001
    Assignee: Interval Research Corporation
    Inventors: Max V. Mathews, Thomas E. Oberheim
  • Patent number: 6204457
    Abstract: A digitizer pen includes a barrel section, a nose section removably attached to the barrel section, and an ink cartridge disposed in the barrel section and having a writing tip protruding from an end of the nose section, a cylindrical ferrite core disposed in the nose section, a first portion of the ferrite core being rigidly attached to the nose section. A coil surrounding a second portion of the ferrite core is attached to the barrel section. A writing tip end of the ink cartridge extends through the ferrite core. The first portion of the ferrite core is separable from the coil, so that when the nose section is removed from the barrel section the first portion of the ferrite core is separated from the coil, leaving the coil attached in fixed relation to the barrel section and also leaving exposed a portion of the ink cartridge initially covered by the first portion of the ferrite core, whereby a user can easily grasp the exposed portion of the ink cartridge and remove it without the aid of a tool.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: March 20, 2001
    Assignee: Fine Point Innovations, Inc.
    Inventors: Alexander B. Shekhel, Stephen R. Caldwell
  • Patent number: 6188392
    Abstract: A marking device is provided. The marking device (MD) includes an elongated housing that has a tip configured to contact a surface. The MD also includes a pressure sensor disposed within the housing. The pressure sensor is coupled to the tip and is configured to detect when the tip contacts the surface. The MD further includes first and second acceleration sensors disposed within the housing and adjacent the tip of the MD. The first and second acceleration sensors are configured to sense acceleration of the tip in first and second directions. Responsive to the sensing of acceleration, first and second acceleration sensors generate a signal indicative of acceleration in first and second directions. The MD also includes a conversion device configured to receive first and second signals and convert first and second signals into at least one computer readable signal.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: February 13, 2001
    Assignee: Intel Corporation
    Inventors: Michael O'Connor, David S. Vannier