Abstract: A matrixed display device comprises a plurality of monochrome optical bodies arranged in a matrix of intersecting horizontal rows and vertical columns and an optical bandpass filter element associated with each such body. The filter elements are in first, second and third arrays, passing red light, green light and blue light respectively. In each row and column of the matrix, a filter element of one of the three arrays is located between filter elements of the other two arrays. With this arrangement of filter elements, a color pixel can be formed by selectively stimulating first and second monochrome optical bodies that are adjacent each other in a first row of the matrix and a third monochrome optical body that is in a row adjacent the first row and is in the same column as one of the first and second optical bodies.

Abstract: The modem of this invention is capable of direct connection to a communication Host associated with a mainframe computer which uses a bisynchronous (bisync) protocol so that the Host believes a valid terminal is continuously connected regardless of whether the modem is online or offline. This permits communications to be established with the mainframe over the public switched telephone network.

Abstract: A data stored display device such as wrist watch comprises a central processing unit, a transmitting and receiving means for transmitting and receiving data and including a coil, RAMs written in and read out data under the control of the central processing unit, a display panel for displaying data stored in the RAMs and a stand-by switch for changing the transmitting and receiving means for non-transmitting and receiving condition to a transmitting and receiving condition so that the data stored display device can be inputted data from an external controller such as a computer having a transmitting and receiving coil and can function as a display panel of the external controller.

Abstract: A transparency designation memory is provided in parallel with color loop-up tables (CLUTs) corresponding to a plurality of frames. When color value data are set in the CLUTs, a transparency designation memory section detects if the color value is transparency or not, and writes data indicating the presence or absence of transparency designation. A frame selector is also provided, which selects a displayed image frame according to the transparency designation signal outputs stored corresponding to entry addresses and in the order of display priorities of the image frames.

Abstract: The character displaying capacity of a monitor is enhanced by operating the pixel clock at a frequency at which beam narrowing occurs so that adjacent pixels are substantially distinct from each other. The operating clock frequency exceeds the bandwidth of the video channel and is at a frequency higher than the clock frequency at which pixel smearing occurs.

Abstract: A system for hearing impaired persons for nonaudibly signalling the occurrence of monitored events such as an audible event (e.g. a baby crying), a telephone line signal, a switch closure, or a transducer output. The system includes a receiver module for producing a nonaudible signal responsive to an RF signal command, modulated by both a common and an identification frequency tone, received from one or more transmitter modules, each monitoring a predetermined set of events. The receiver and transmitter modules are configured to consume sufficiently low electric power to enable them to be battery energized. Battery energization permits the receiver module to be packaged in a pocket sized portable unit which the hearing impaired person can carry with him in his normal daytime activities.

Abstract: A computer video demultiplexer for combining a plurality of low resolution, video input signals into a plurality of higher horizontal and vertical resolution video output signals. Control signals for the video demultiplexer are coded on non-displayed video scan lines which are uniquely addressable so that several demultiplexers operated from one video signal may control a number of high resolution peripheral devices.

Abstract: A method and system for efficiently generating grayscale character fonts from bi-level master character fonts decomposed into rectangles. For each filter array to be used for converting master character fonts into grayscale characters there is generated at least one summed area filter array. Each element in each summed area filter array represents the sum of the filter array elements in a corresponding subarray of the filter array.

Abstract: A microprocessor controlled digital engine analyzer receives analog input signals from an engine being analyzed, engine parameter data entered via a keyboard, and function data, selecting one of several operating modes for the analyzer and which information is to be displayed, entered via the keyboard, and displays on a CRT screen the selected information such as cylinder firing order, RPM, Dwell, KV and DC volts, alphanumerically, information such as primary and secondary ignition and voltage, alternator and fuel injector information through the use of continuous waveform patterns, and additional information pertaining to Dwell, KV and Cylinder Shorting through the use of bar graphs.

Abstract: An electronic locking device which is particularly useful for safes in a hotel room comprises an unlocking circuit actuated when a code on a magnetic card which acts as the "key" is read by a card reader forming part of the device agrees with an unlocking code stored in the memory of the device. The unlocking code from the card is set in memory when the memory is enabled and the magnetic card is loaded into the card reader for a plurality of times within a relatively short pre-selected time interval.

Abstract: A microprocessor controlled digital engine analyzer receives analog input signals from an engine being analyzed, engine parameter data entered via a keyboard, and function data, selecting one of several operating modes for the analyzer and which information is to be displayed, entered via the keyboard, and displays on a CRT screen the selected information such as cylinder firing order,RPM, Dwell, KV and DC volts, alphanumerically, information such as primary and secondary ignition and voltage, alternator and fuel injector information through the use of continuous waveform patterns, and additional information pertaining to Dwell, KV and Cylinder Shorting through the use of bar graphs.

Abstract: A display control apparatus having an improved attribute function is disclosed. The control apparatus comprises a refresh memory having a plurality of storage addresses, each storage address storing a pattern code and an attribute code, an address circuit for selecting one of the storage addresses of the refresh memory and a video signal generator for generating a video signal in accordance with the pattern code and the attribute code, and features an attribute memory for storing a control code and a control circuit for making the attribute code from the refresh memory effective or ineffective in accordance with the content of the control code.

Abstract: A computer terminal including a cathode ray tube display in an explosion-protected electrically grounded enclosure. The front wall of the enclosure is formed by a hermetically sealed keypanel having an electrically conductive window located opposite the display for discharging, without sparking, static electricity to the grounded enclosure. The keypanel is formed from a rigid metal plate containing a pattern of several apertures in which the mounted pressure-sensitive piezoelectric switches which serve as data key input devices. A deformable metal sheet covers the rigid metal plate and apertures and has defined therein pressure points opposite corresponding apertures. The rigidity of the metal plate is sufficient to prevent pressure applied to one pressure point from affecting a switch at any other pressure point.

Abstract: The invention relates to a graphic display device. The main object of the invention is a screen display device using a combination of directed-beam scanning for drawings of patterns and frame-scanning display for surface coloring. The device of the invention comprises a microprocessor which makes real-time calculations, for each line displayed, of the starting and finishing abscissae of the various colors to be used. Real-time computing by the microprocessor makes it possible to use video memories instead of the habitually used page memories and to replace a very bulky and expensive graphic processor with a fast microporocessor. The invention can be applied chiefly to the display of three-dimensional perspective views on color screens.

Abstract: A method is described for improving the responsiveness and accuracy of a graphics system to user-initiated picking actions. In this method, the visual cueing and pick window positioning components of the graphics system tracking/picking function are temporarily separated at the time the user attempts to pick. By handling these two components of the tracking/picking function independently, both type 1 (failure to pick the desired item) and type 2 (picking an undesired item) errors are prevented. This translates into greater productivity for the graphics system user.

Abstract: An apparatus and method for color blinking in a color display system. The system of this invention comprises: a palette means for converting color codes from a processor to color video signals for ultimate display in a color display, blink color registers for storing a first color video signal representing a first color to be blinked and for storing a second color video signal representing a second color different from the first color and from any colors stored in any palette circuit register, a blink code register for storing the address of the palette register storing the first color video signal, and a control means for alternately writing the first and second color video signals into the palette register represented by the palette register address in synchronization with the cycle of a blink clock.

Abstract: The invention is directed to a telephone structure that eliminates the need for fasteners to assemble a keypad and secure the keypad in place in the telephone. This is accomplished by a telephone that comprises a hollow housing (100) having a face portion (120) that includes an array of holes (122) and a keypad assembly (400) that comprises a sandwich of a static shield (430), button member (410), and switch contact member (450). The keypad assembly is assembled on the underside of the housing by means of a locating member (300) which has upstanding collar portions (325) that register in the holes of the face portion and depending pins (328) that register in holes in the members of the keypad assembly. The keypad assembly is held in place by a base member (200) that is joined to the housing and supports a raised pedestal (210) that extends into close proximity with the underside of the face portion and presses the keypad assembly against the face portion (FIG. 1).

Abstract: A variable color display device comprises a plurality of display areas arranged in a 7-segment font. Each display area includes at least two light emitting diodes for emitting upon activation light signals of respectively different primary colors and means for blending the light signals within the display area to obtain a composite light signal of a composite color. The light emitting diodes are selectively activated by pulses of substantially constant amplitude to display desired characters. Color control selectively controls the durations of the pulses to control the portions of the primary colors, to thereby control the color of the composite light signal.

Abstract: The elimination of crosstalk between data lines and pixel cells in a thin film transistor/liquid crystal display is accomplished by applying a data signal to a given data line for a time period less than the standard scan line period of the display, and applying a crosstalk compensation signal to the given data line for the remainder of the scan line period.

Abstract: Image display apparatus comprises, a monitor (6); a monitor control system (4,5) connected to the monitor (6); and a color modifying circuit (2) for receiving from a store (1) first signals representing the color content of pixels of an image and for generating monitor control signals for each pixel which are fed to the monitor control system. The color modifying circuit (2) generates for any first signals representing a color which falls outside the gamut of colors normally displayable by the monitor (6), monitor control signals representing a respective equivalent color which falls within the monitor gamut, by applying a predetermined algorithm to the first signals which desaturates all the image colors while leaving hue and intensity unaffected.