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| Number | Title | Issue Date |
| 6091031 | Portable information terminal and an activating method thereof A portable information terminal is provided. The terminal includes a touch screen panel having an activation area and an activating unit. The activation unit activates the portable information terminal when the terminal is turned off and an activating pos... | 07/18/2000 |
| 6075520 | Small current detector circuit and locator device using the same The improved small current detector circuit and locator device each include a first and a second capacitor, a pulse drive circuit which drives one terminal of each capacitor by a pulse signal and charges and discharges the capacitors in synchronism with t... | 06/13/2000 |
| 6075521 | Coordinate input device A coordinate input device includes a casing having an upper surface and a lower surface which are not parallel to each other. A columnar position designating member is disposed within the casing. The angle of the position designating member as viewed from... | 06/13/2000 |
| 6028271 | Object position detector with edge motion feature and gesture recognition Methods for recognizing gestures made by a conductive object on a touch-sensor pad and for cursor motion are disclosed. Tapping, drags, pushes, extended drags and variable drags gestures are recognized by analyzing the position, pressure, and movement of ... | 02/22/2000 |
| 6005555 | Position detecting apparatus and method for detecting position pointing device A position detecting apparatus capable of detecting position pointing devices of any combination simultaneously out of plural position pointing devices, thereby providing a user a friendly apparatus. A frequency of a resonance circuit provided inside a po... | 12/21/1999 |
| 6002389 | Touch and pressure sensing method and apparatus The present invention provides a touch pad which can detect a simply stylus using a change capacitance. The touch pad is made flexible, so that the stylus pressure compresses an insulating layer between a conductive reference layer and matrix of conductiv... | 12/14/1999 |
| 5959260 | Method for entering handwritten information in cellular telephones A cellular telephone (100) has a receiver (506) and a transmitter (508) and a detachable battery (106) retrofitted for entering handwritten information and for providing power to the cellular telephone (100). The detachable battery (106) has a digitizer (... | 09/28/1999 |
| 5942733 | Stylus input capacitive touchpad sensor A capacitive touch pad comprises a substrate material, such as a PC board type laminate material, having a plurality of first parallel conductive traces running in a first (X) direction disposed on a first face thereof, and a plurality of second parallel ... | 08/24/1999 |
| 5943044 | Force sensing semiconductive touchpad A touchpad assembly and method for providing a signal to a computer indicative of the location and applied pressure of an object touching the touchpad assembly is provided. The touchpad assembly includes X and Y position and pressure sensitive semiconduct... | 08/24/1999 |
| 5929834 | Liquid crystal display device with tablet A liquid crystal display device with a tablet reduced in apparatus thickness and enhanced in display visibility. The liquid crystal display device mainly composed of a liquid crystal display upper glass plate, a liquid crystal, and a liquid crystal displa... | 07/27/1999 |
| 5926171 | Coordinate data input device A coordinate data input device comprises: a sensing board fabricated by forming a plurality of parallel first electrodes on the front surface of a film and forming a plurality of parallel second electrodes perpendicularly to the first electrodes on the ba... | 07/20/1999 |
| 5920309 | Touch sensing method and apparatus Method and apparatus for sensing the simultaneous proximity of one or more fingers or other appropriate objects to a capacitive touch sensor. A modulator/demodulator pair drive and sense either a single trace or a pair of traces. In a dual trace embodimen... | 07/06/1999 |
| 5914465 | Object position detector A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matri... | 06/22/1999 |
| 5914708 | Computer input stylus method and apparatus A system comprising a conductive stylus used in conjunction with a capacitance sensitive touch pad, said system providing at least two different signals to an associated computer system. The stylus is a pen-like device having an actuable switch which when... | 06/22/1999 |
| 5902967 | Method and apparatus for eliminating an offset signal in an electrostatic digitizing tablet A method and apparatus for detecting when a second object touches a digitizing panel while a first object is touching the digitizing panel is disclosed. The method includes the steps of generating a first composite signal when the first object touches the... | 05/11/1999 |
| 5898136 | Position detecting apparatus having a tablet and a position pointing device A position detecting apparatus includes a position point device and a tablet. The position pointing device has a simple configuration as well as an easy way of adjusting a resonance frequency, without requiring a wide range of frequencies for inputting in... | 04/27/1999 |
| 5889236 | Pressure sensitive scrollbar feature A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matri... | 03/30/1999 |
| 5886687 | Touch panel system utilizing capacitively-coupled electrodes A touch screen system includes a touch screen having a surface which is adapted to be touched by a user, a resistive substrate which spans the screen and has two opposite boundaries, and a pair of electrodes which are capacitively coupled to the resistive... | 03/23/1999 |
| 5861875 | Methods and apparatus for data input Methods and apparatus for data input. Devices are provided in accordance with this invention which utilize capacitive coupling of an object to the device to sense the object's position. The devices are comprised of a plurality of electrode strips which fo... | 01/19/1999 |
| 5861583 | Object position detector An object proximity sensor includes a capacitive touch-sensitive transducer including row conductive lines insulated from column conductive lines to from a matrix. An insulating layer is disposed over the matrix and has a thickness selected to achieve sig... | 01/19/1999 |
| 5854625 | Force sensing touchpad A force sensing touchpad comprises a substantially rigid touch surface; a substantially rigid frame; a plurality of spring structures formed integrally with the touch surface and mechanically connected to the reference frame; and a circuit for deriving fo... | 12/29/1998 |
| 5841078 | Object position detector A proximity sensor system includes a sensor matrix array having a characteristic capacitance between horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor ... | 11/24/1998 |
| 5841427 | Method and apparatus for canceling an offset signal in an electrostatic digitizing tablet A method and apparatus for generating an output signal in a digitizer. The method includes the steps of generating a first signal when a user contacts a sensor panel wherein the first signal has a first component and a second component, generating a secon... | 11/24/1998 |
| 5801682 | Tactile designation device with high-resolution transparent capacitive surface A tactile designation device comprises a continuous transparent capacitive surface supported at its corners by flexible strips to which there are attached strain gauges, a HF supply source, a series capacitor, a multiplexer, a detection circuit and a comp... | 09/01/1998 |
| 5790106 | Coordinate input apparatus with pen and finger input detection A coordinate input apparatus which performs an input operation with high precision by use of either an operator's finger or an input pen. The input apparatus includes a tablet having a plurality of X electrodes and Y electrodes arranged in the form of a m... | 08/04/1998 |
| 5790107 | Touch sensing method and apparatus Method and apparatus for determining small variations in capacitance, typically in a capacitive touch sensing device, includes a reference signal of a first frequency and a sample signal of a second frequency. The reference and sample signals are mixed an... | 08/04/1998 |
| 5650597 | Capacitive touch sensor The present invention relates to a capacitive touch sensor including a plurality of horizontal sensor bars arranged in a single direction. The touch sensor preferably receives differential sensor signals from the sensor array to reduce proximity effects a... | 07/22/1997 |
| 5648642 | Object position detector A proximity sensor system includes a sensor matrix array having a characteristic capacitance between horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor ... | 07/15/1997 |
| 5642134 | Integrated tablet device having position detecting function and image display function A coordinate defining signal is applied to an counter electrode in a period different from a writing period of voltages to pixel electrodes, and detected by way of an electrostatic capacitive coupling to determine a coordinate. Concurrently, to avoid a ma... | 06/24/1997 |
| 5579036 | Touch screen device and shielding bracket therefor A bracket for shielding a capacitive touch screen from external noise arising from stray capacitance comprises upper and lower complementary rectangular conductive metal shield elements which are joined together inside a housing with a transparent touch s... | 11/26/1996 |
| 5565658 | Capacitance-based proximity with interference rejection apparatus and methods Apparatus and method for a capacitance-based proximity sensor with interference rejection. A pair of electrode arrays establish a capacitance on a touch detection pad, the capacitance varying with movement of a conductive object near the pad. The capacita... | 10/15/1996 |
| 5543590 | Object position detector with edge motion feature A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matri... | 08/06/1996 |
| 5543588 | Touch pad driven handheld computing device A handheld computing device comprises a thin enclosure having two opposing major faces. A display screen is disposed on a first one of the major opposing faces of the enclosure and a touch-sensitive object position detector input device is disposed on a s... | 08/06/1996 |
| 5541371 | Palpably controllable digital plate A cost-effective and/or convenient digital plate being palpably controllable is provided. The digital plate includes an induction plate capable of inducing a change of a parameter when in contact with an object having a reactant property, a measurer for s... | 07/30/1996 |
| 5528267 | Tablet integrated with display A tablet integrated with a display comprising a matrix panel having row and column electrodes, a detecting conductor, a row electrode driver, a column electrode driver, a row coordinate detecting circuit and a column coordinate detecting circuit, in case ... | 06/18/1996 |
| 5495077 | Object position and proximity detector A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matri... | 02/27/1996 |
| 5488204 | Paintbrush stylus for capacitive touch sensor pad A proximity sensor system includes a touch-sensor pad with a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or obj... | 01/30/1996 |
| 5457289 | Frontally shielded capacitive touch sensor system A frontally shielded capacitive touch sensor system includes a capacitive touch sensor having a touch sensitive surface; a front shield mounted in front of the touch sensor and extending peripherally about the surface surrounding an exposed accessible are... | 10/10/1995 |
| 5374787 | Object position detector A proximity sensor system includes a sensor matrix array having a characteristic capacitance on horizontal and vertical conductors connected to sensor pads. The capacitance changes as a function of the proximity of an object or objects to the sensor matri... | 12/20/1994 |
| 5369228 | Data input device with a pressure-sensitive input surface A data input device having an arrangement of deformable layers including at least a dielectric material above a resistive layer. The material is elastically deformable so that, when pressure is applied to an input surface, the distance between the input s... | 11/29/1994 |
