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| Number | Title | Issue Date |
| 5194852 | Electro-optic slate for direct entry and display and/or storage of hand-entered textual and graphic information A portable interactive electro-optic data input/output, processing, storage, and display device responsive to hand printed text and hand drawn graphics. The device preferably comprises a combined flat panel display and input pen sensing surface constructe... | 03/16/1993 |
| 5151688 | Input/output display panel with light pen An information input and output apparatus includes an active matrix type display device and switching device. In the information input and output apparatus, the display device displays an image according to an image signal, and has plural pixel electrodes... | 09/29/1992 |
| 5073770 | Brightpen/pad II A scanning and digitizing device where the same photodetectors are used in a scanning mode and in a digitizing mode. In the scanning mode graphic information is scanned. In the digitizing mode coordinate positions of a stylus is determined. The photodetec... | 12/17/1991 |
| 5003167 | Document reader The invention concerns a photosensitive device (1) enabling the formation of the image of a document (10) and the conversion of this image into electrical signals with a view to its reproduction or transmission. To this effect, the photosensitive device (... | 03/26/1991 |
| 4977315 | Liquid crystal position determining system and wand device A coordinate position determining system and method includes a liquid crystal material separating first and second groups of conductors. The tablet is at least partially light transmissive, but may include a partially reflective layer. The first and secon... | 12/11/1990 |
| 4872000 | Coordinate input apparatus A coordinate input apparatus which comprises a display unit having a display layer, and a protecting layer disposed on said display layer and having two-dimensionally arranged light guides for transmitting light from the display layer in the direction sub... | 10/03/1989 |
| 4846694 | Computer controlled, overhead projector display Apparatus for demonstrating the use of a computer terminal comprises a projection module supported on a standard overhead projector. The projection module includes a frame which is adapted to rest on an illumination window of the overhead projector. A tra... | 07/11/1989 |
| 4841290 | Display unit In a display unit comprising a plate-shaped display panel with X-Y matrix electrodes consisting of two groups of electrodes, X-axis electrodes and Y-axis electrodes, display signals are applied to the X-Y matrix electrodes, a.c. current is applied to at l... | 06/20/1989 |
| 4794634 | Position-sensitive photodetector and light transmissive tablet and light-emitting pen The data input device comprises a tablet portion made of a two-dimensional position-sensitive photodetector and a planar display element laid one on the other, and a light emitting pen forming a light spot on a light-receiving surface of the position-sens... | 12/27/1988 |
| 4785564 | Electronic notepad An electronic notepad comprises a wire/display area for receiving and displaying graphic information, a control for the device and a keyboard for entering information and/or instructions. Two types of liquid crystal display arrays, both fabricated on a se... | 11/22/1988 |
| 4730186 | Input integrated flat panel display system A system using an input integrated flat panel display of an integrated structure, having an input device for inputting through handwriting characters, graphics, or points and a flat panel display laid upon the input device for displaying in accordance wit... | 03/08/1988 |
| 4679909 | Liquid crystal input/output matrix panel Numerous photoelectric translation cells are arranged to correspond to associated picture elements in an active type matrix LCD display system. When a light pen is used as an input means, the system allows detection of light beam positions, enabling it to... | 07/14/1987 |
| 4525707 | Gas panel interrogation by selective sustain A gas panel can provide optical data readout in an essentially serial manner for copying, communication, interaction and indication. This is accomplished by using substitute sustain cycles for reading particular addresses. A complement sustain signal obta... | 06/25/1985 |
| 4405921 | Liquid crystal display device A light crystal display device which includes a liquid crystal panel and a light pen. The liquid crystal panel includes a plurality of display dots defined by spaced electrodes having a twisted nematic liquid crystal therebetween. The display dots are sel... | 09/20/1983 |
| 4277783 | Light pen tracking method and apparatus An initial location of a light pen (150) placed on the surface of an ac plasma panel (100) is determined by scanning the panel with a two-step finder mode. In the first step, the display sites of every seventh row of display sites of the panel are caused ... | 07/07/1981 |
| 4205304 | Two dimensional light beam selection system A position selection system comprising a map of a plurality of selection positions arranged in columns and rows with a normally unenergized light emitter and a respective normally disabled light detector positioned at opposie ends of each of the columns a... | 05/27/1980 |
| 4188566 | Method for detecting coordinates of gas discharge panels and apparatus for carrying out the same A method and an apparatus for determining coordinates in a self-shift type gas discharge panel by means of a light pen, the panel comprising a group of X electrodes connected in common at periodic intervals and a group of Y electrodes crossing said X elec... | 02/12/1980 |
| 4139803 | Method and apparatus for detecting the location of a light detecting pen on a gas discharge display panel In conjunction with an AC plasma display panel a light detecting pen is employed to designate coordinate points on the panel. Circuitry is employed to scan the electrodes of the panel with sustain voltage pulses at predetermined intervals and determine th... | 02/13/1979 |
| 4117471 | Light pen detection and tracking with AC plasma display panel A light pen detection and tracking scheme for detecting and tracking both "on" and "off" cells with a single cursor voltage waveform in an AC gas discharge display panel. The special cursor voltage waveform is applied to the panel during the sustain cycle... | 09/26/1978 |
| 4099170 | Light pen detection for plasma panels using specially timed and shaped scan pulses An enhanced light pen capability for plasma display panels is provided by applying specially timed scan write and scan erase pulses to the cells of the panel, the pulses being shaped and positioned relative to the normal sustain pulse sequence such that a... | 07/04/1978 |
| 3976992 | Gas display panel with light pen An improved light pen is provided for a gas display panel of the type in which an alternating polarity sustain voltage produces a succession of brief light flashes in a matrix of light emitting cells. The timing for the sustain voltage is disturbed along ... | 08/24/1976 |
| 3967267 | Light pen detection for plasma panels using specially timed scanning address pulses An enhanced light pen capability is provided in plasma display panels by applying specially timed write and erase pulses in a scanning manner over the panel, the pulses being shaped and positioned relative to the normal sustain pulse sequence in such mann... | 06/29/1976 |
| 3958234 | Interactive stylus sensor apparatus for gas panel display Sensor apparatus for taking position signals from either ignited or extinguished cell positions at intersections of the column and row coordinate conductors of a gas tube display screen associated with an information handling system. The sensor apparatus ... | 05/18/1976 |
| 3949391 | Plasma panel light pen tracking using adaptive tracking scan A light pen tracking system and method particularly adapted for use with a plasma panel in which a first plurality of display sites on a display device are sequentially excited in such manner as to generate a signal which may be detected by a light pen. U... | 04/06/1976 |
| 3938137 | Plasma panel light pen tracking using adaptive tracking scan A light pen tracking system and method particularly adapted for use with a plasma panel in which a first plurality of display sites on a display device are sequentially excited in such manner as to generate a signal which may be detected by a light pen. U... | 02/10/1976 |
