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| Number | Title | Issue Date |
| 6008718 | Single-resistor-foil pressure sensitive coordinate input system The present invention relates to a single-resistor-foil pressure sensitive coordinate input system, which comprises: a resistor foil surrounded by a frame, and a base with a copper plate covered by the resistor foil and an control circuit. The frame has f... | 12/28/1999 |
| 5986223 | Touch panel with a contact conductive layer comprising a phototransparent organic conductive film This invention relates to a touch panel with improved resistance property to resolve problems of conductive layer crack by manufacturing a touch panel comprising a combined conductive film by a film coated with a conductive layer in the touch panel struct... | 11/16/1999 |
| 5923388 | Touch panel A touch panel includes a display unit having display elements which are arranged in a first lattice, and an input panel, put on the display unit, having a structure in which transparent resistive films maintained at a predetermined distance by insulating ... | 07/13/1999 |
| 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 |
| 5854448 | Coordinate input device used for inputting characters and drawings into a personal computer/word processor A coordinate input device includes (1) a pen switch sensing circuit for providing a power supply to a pen switch in a position sensing pen, and for sensing that the pen switch is turned on and off and (2) a pen switch control circuit for controlling a tim... | 12/29/1998 |
| 5854451 | Pressure sensitive resistor cell A simple-structured pressure sensitive resistor cell which is free from the influence of contact resistance when performing coordinate detection, and which permits reduction of power consumption. In a waiting state, a logic circuit makes a primary detecti... | 12/29/1998 |
| 5852260 | Pressure sensitive three-dimensional tablet and manipulation data detecting method therefor When a pair of opposed resistance sheets of a pressure sensitive 3D tablet are pressed into contact with each other by a tablet manipulation, an equal current is applied to a reference resistor RC, and the position of contact (xp,y | 12/22/1998 |
| 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 |
| 5834709 | Position sensing systems including magnetoresistive elements The present invention provides a position-sensing system which employs sensors incorporating magnetoresistive materials. The position of a magnetic information input member is determined through the resistance change of the magnetoresistive sensor in resp... | 11/10/1998 |
| 5818430 | Touch screen An touch screen of the voltage-divider type is provided which includes two substrates spaced apart from each other by a gap, each substrate including a region formed of conductive material formed in overlapping relationship to each other. A pair of strips... | 10/06/1998 |
| 5815141 | Resistive touchscreen having multiple selectable regions for pressure discrimination A resistive two sheet touchscreen that provides discrimination between objects touching the surface thereof. This is achieved by subdividing at least one sheet into a selected number of separated portions of selected configuration. Each of these portions ... | 09/29/1998 |
| 5804773 | Simplified touch screen with improved position accuracy An improved touch sensor having a resistive surface and simplified corner electrodes for introducing electrical potentials into the resistive surface. Improved positional accuracy is achieved by selectively energizing the touch sensor transversely (either... | 09/08/1998 |
| 5790105 | Pressure sensitive resistor tablet coordinate input device A pressure sensitive resistance tablet coordinate input device is provided which enables the cursor to be moved to a desired position on a PC display by pressing a tablet sheet (6) with a stylus, permits the stylus press-shift operation at the center of t... | 08/04/1998 |
| 5777898 | Method and apparatus for aligning a digitizing panel with a display device A method and apparatus for aligning a first coordinate system of a digitizing panel with a second coordinate system of a display device. The method includes the steps of displaying a plurality of reference points on the display device, each of the referen... | 07/07/1998 |
| 5760715 | Padless touch sensor The padless touch sensor is used for detecting a touch at a sensing location onto a dielectric element by a user coupled to earth. The sensor comprises a conductive plate attached under the dielectric element and in registry with the sensing location. A p... | 06/02/1998 |
| 5751229 | Angular information input system An angular information input system detects the inclined angle of a pointing device with a high accuracy without possible errors. This system is constituted so as to detect the induction voltage distribution in each axial direction generated by sensing co... | 05/12/1998 |
| 5750937 | Multi-load cell force sensing apparatus A multi-load cell force sensing apparatus includes a plurality of load cells supporting an operating surface and a controller which determines the position, as well as the magnitude, of an applied force relative to the operating surface. Impulse forces ma... | 05/12/1998 |
| 5750940 | Coordinate input tablet with notched film substrate A tablet that hardly causes the fluctuation in the sheet resistance on a film substrate despite the small size of the tablet. The edge of one side of the film substrate requiring a notch for connector insertion are provided with other notches having the s... | 05/12/1998 |
| 5736688 | Curvilinear linearization device for touch systems A contact input system with conductive segments made of a conductive ink and formed to follow a selected pattern that are located on a rectangular resistive surface. The conductive segments to the left of a T-shaped segment at the midpoint of each side ar... | 04/07/1998 |
| 5719597 | Apparatus for scanning user input devices A scanning apparatus for uniquely identifying an actuated key on a keyboard and an actuated location in a drawing tablet. The scanning apparatus includes independently actuatable switches associated with the keyboard. The scanning apparatus also includes ... | 02/17/1998 |
| 5686705 | Surface position location system and method Electrographic sensor and method for position determination of a selected position thereon. Sensor includes a conductive material layer having electrical resistivity and a surface, at least three spaced apart contact points electrically interconnected wit... | 11/11/1997 |
| 5670755 | Information input apparatus having functions of both touch panel and digitizer, and driving method thereof An information input apparatus having both functions of touch panel and digitizer is disclosed including a stylus pen for applying a power source and for touching, a panel having upper and lower substrates, a first resistive layer formed on the upper subs... | 09/23/1997 |
| 5668353 | Input panel avoiding interference pattern and method of forming the same An input panel of a resistance layer type includes a first board having a first transparent conductive layer on its surface and a second board having a second transparent conductive layer on its surface. The first board and the second board are arranged s... | 09/16/1997 |
| 5659154 | Method and apparatus for coordinate detection A digitizing tablet includes stacked X and Y coordinate resistance boards (X-board and Y-board) with insulating beads therebetween. A CPU controls input and grounding switches of both X- and Y-boards and a selector switch. The selector switch connects an ... | 08/19/1997 |
| 5627347 | Digitizer having improved signal to noise characteristics A digitizer includes a flat panel medium with which a stylus contacts for information input, an outputting device for visualizing and outputting information according to the information input by the stylus, and a resistor installed between the outputting ... | 05/06/1997 |
| 5589857 | Coordinate input device A coordinate input device includes an input surface in the form of a rectangle and a face-plate switch. The input surface is formed by overlapping a first input detecting member and a spaced second input detecting member. When the input surface is pressed... | 12/31/1996 |
| 5568409 | Tablet with system power saving features including reactivation by pen contact after inactive period A tablet system has an improved operation for saving power. During a digitizing period, the tablet supplies power to resistive sheets that produce analog pen position signals and to the sample and hold circuit and the analog to digital converter that oper... | 10/22/1996 |
| 5559504 | Surface shape sensor, identification device using this sensor, and protected system using this device A device for performing identification by sensing the fingerprint of a finger includes an input unit. The input unit is constituted by a plurality of linear contact electrodes formed on a substrate, and a pressure-sensitive sheet formed on the linear cont... | 09/24/1996 |
| 5550329 | Apparatus for driving a resistance film type input device There are provided a first transistor for applying voltage to the Y-axis electrode, a second transistor for applying voltage to the Y-axis electrode and discharging electric charges accumulated at the Y-axis electrode, a third transistor for applying volt... | 08/27/1996 |
| 5541370 | Pressure-sensitive pad and production thereof A writing pad having a construction wherein two substrates each having electrodes formed on one of the surfaces are disposed in parallel in such a way that their electrodes face one another with a predetermined gap between them. The gap is defined by insu... | 07/30/1996 |
| 5539159 | Handwriting capture device A handwriting capture device which employs a highly sensitive digitizer to accurately capture signature information entered using a writing force greater than or equal to a predetermined writing force. The handwriting capture device includes a housing hav... | 07/23/1996 |
| 5530209 | Coordinate input device and method for manufacturing same A coordinate input device including a flexible upper substrate mounted on a rigid lower substrate and having a centrally-located input operating portion. The upper substrate includes a first resistance layer laminated thereon and X-axis electrodes formed ... | 06/25/1996 |
| 5518078 | Coordinates input device In a panel member of a coordinates input device, a first input unit and a second input unit are set on a pair of transparent electrodes and the first input unit only allows input by a member of a relatively large pressing pressure such as by using a pen. ... | 05/21/1996 |
| 5516113 | Resistive matrix targeting system The invention is a target system capable of determining projectile entrance by detecting loss resistors formed by a graphic colloidal suspension coating of conductive ink placed beneath a graphic target. The target is a low cost sheet of flexible paper po... | 05/14/1996 |
| 5496974 | Apparatus for detecting the coordinate position of a contact point on touch panel In an apparatus for detecting a coordinate position of a contact point in a touch panel, a resistance layer having a pair of electrodes opposed in a X direction and another resistance layer having a pair of electrodes opposed in a Y direction are opposed ... | 03/05/1996 |
| 5466895 | Wear resistant improved tablet for a digitizer An improved tablet for a digitizer including a stylus and a tablet for digitizi An 5 Vt pV:stylus position on the tablet as a function of the stylus current distribution over the tablet includes a first resistive coating on the face of the tablet for cond... | 11/14/1995 |
| 5455574 | Touch panel device including resistance material and position detecting unit A touch panel device comprises a resistance material on which a potential gradient is formed extended along an X axis, a contact electrode to be pushed to contact with the resistance material, a potential supplying unit for selectively supplying to the co... | 10/03/1995 |
| 5453941 | Method and device for detecting and measuring pressure and coordinates in pressure-sensitive pads A data input resistance pad for measuring coordinates and pressure of a stylus pressed on the pad has X and Y-coordinate resistance boards. The X and Y-coordinate resistance boards are connectable by respective switches to high and low voltage sources at ... | 09/26/1995 |
| 5451724 | Touch panel for detecting a coordinate of an arbitrary position where pressure is applied A touch panel to detect a coordinate of an arbitrary position where pressure is applied. The touch panel includes a substrate, a resistor layer provided on the substrate, a spacer layer made of an insulator material, a conductor layer confronting the resi... | 09/19/1995 |
| 5440079 | Object-background discrimination using analog VLSI circuit An analog VLSI circuit having a network of resistive elements and switches is provided for discriminating between an object and the background in a sensor image of a scene. A sensor system captures two-dimensional visual images and identifies edges of obj... | 08/08/1995 |
