Abstract: A pattern write control circuit of the invention has a graphic memory consisting of a plurality of memory planes each storing corresponding to color data for color display, an address selector for supplying a common address to the plane memories, a register storing the color data corresponding to each memory plane and simultaneously supplying the color data to a common location of the memory planes accessed by the common address, and a decoder for producing write enable signal for writing the color data into a specified memory plane in accordance with the display color data of the dot supplied from a CPU.

Abstract: A method for displaying information within windows which are capable of overlapping on a video display of a computer controlled video display system, wherein said windows are defined by an operating environment on the video display independently of the writing of said video display data comprising the steps of:providing a memory means within said computer including at least one pseudo-screen buffer memory means for storage of display data;writing display data to said at least one pseudo-screen buffer memory means without calling said operating environment;storing current display data in said pseudo-screen buffer memory means;determining the visible display area of said windows on said video display for video display data associated with said windows; anddisplaying said video display data associated with said windows from said pseudo screen buffer memory means on said visible display area of said windows.

Abstract: An acknowledge back (ack-back) pager is provide for use in a paging system which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back data on different frequency sub-bands, a different frequency sub-band being allocated to each of the pagers in the group. The invention provides apparatus for controlling the frequency of the selected sub-band with very high accuracy.

Abstract: A computer-based digital oscilloscope includes a touchscreen mechanism for generating output signals indicating when an operator has touched the oscilloscope's screen and identifying a particular touch zone area that the operator has touched from among a plurality of touch zone areas of the screen. A computer which controls display of waveforms and other images on the screen, monitors the touchscreen output signals to determine whether the operator is touching a touch zone and to determine whether a portion of a particular image other than a waveform is displayed on the screen within boundaries of the touch zone.

Abstract: Image display apparatus reads data from an image memory to produce an image on a interlaced raster-scanned display. The image can be zoomed by producing X and Y magnifications. X magnification is produced by repeating each pixel a predetermined number of times. Y magnification is produced by repeating each display line a predetermined number of times. The number of repetitions of each display line can be varied from line to line and can be different in the two frames, so as to cope with odd-number Y magnification factors. This is achieved by using a register file which holds the required line repetition counts.

Abstract: Electro-optical display screen with control transistors wherein a cell of liquid crystal is controlled by the transistors and the row conductors set on one side of the cell as well as by the column conductors (C1, C2) set on the other side of the cell. Each transistor (T11) has its electrode gate (cg11) connected to a row conductor (L1), its source (cs11) connected to a neighbouring row conductor (L2) and its drain (cd11) connected to an electrode of the cell (E11). In a screen of this type, there is thus no intersection between conductors on one and the same side of the screen, nor between additional control conductors, an arrangement that provides for easier access to the control conductors.

Abstract: In one embodiment, an operator control panel includes an enclosure in which a liquid crystal display and a pair of lamps are disposed. A first reflective surface is located inside the enclosure, and a second reflective surface is located outside the enclosure. The lamps are positioned so that light rays from their filaments are projected rearwardly onto the first reflective surface and then forwardly onto the back of the liquid crystal display while other light rays from the lamp filaments are projected forwardly onto the second reflective surface and then downwardly onto the front of the control panel. In another embodiment of the operator control panel, the lamps are disposed outside the enclosure and the second reflective surface is omitted.

Abstract: A monitoring system using a unique remotely piloted drone with dual counter rotating propellers and carrying electric field sensing, thermal infra-red imaging, video imaging, acoustic and corona discharge sensing equipment. The compact remotely piloted drone flies along a power corridor and is maintained at a fixed distance from an outer phase conductor using on board electric field detection circuitry, video/infra-red imagery and an RF/laser altimeter.The counter rotating, twin-turbo driven configuration for the propellers mounted on coaxial vertical shafts provides a highly stable platform, unlike conventional manned helicopters presently used for routine right-of-way patrols. Dual, counter-rotating saucer-shaped auxiliary propellers provide a degree of stability far superior to a conventional helicopter, particularly in gusty winds.

Abstract: A brightness control circuit for use with Plasma and Electroluminescent displays. The circuit receives from a computer, or other driving device, video data to be displayed, an intensity signal indicating the intensity with which to display data, a video clock and horizontal and vertical sync signals. The circuit generates first and second video fields, each having some data removed from the fields defined by the input video signal. These fields are combined to form frame data which is then modulated by the intensity signal. The result is modified video data for coupling to the display which can cause the display to display data at a low intensity.

Abstract: A method and apparatus for displaying an image in each of plural display areas that are adjacently defined in a row direction on a display screen having a plurality of display rows, by defining boundary data for determining a boundary in a row direction between each adjacent display areas for each display row, and switching the image display between each adjacent display area for each display row based on the corresponding boundary data for each row, thereby enabling definition of the boundary freely and simply.

Abstract: A vector generator for us with an all-points-addressable frame buffer capable of the non-word aligned access, simultaneously, of a square M by N array of pixels providing fast vector drawing independently of vector slope and position in the whole screen area of an attached display monitor. The vector generator utilizes a triangular logic matrix together with a line drawing unit to generate M vector bits lying in an M by N square matrix of the screen of an attached monitor in one memory cycle of the frame buffer and uses the generated matrix to generate a direct mask for the frame buffer whereby the M bit vector may be stored in a single memory cycle.

Abstract: An application specific integrated circuit device for cooperating with a microprocessor and an input and read out station, providing timing functions, input data receipt and storage for transmition to the microprocessor, and for receiving, storing and acting upon information received from the microprocessor. The several functions which can be achieved by the circuit are carried out on command from the microprocessor using a single serial data path.

Abstract: A display memory control system is disclosed which is associated with a display system for displaying and outputting character data, graphic data and the like. In the event of displaying images on a display, a system (host computer) writes one screen of display data in one of two VRAMs. The display data are transferred to the display and to the other VRAM to be stored therein. Upon completion of the storage in the other VRAM, the display data stored therein are read out to appear on the display. To update the display data, the system makes a write access to the one VRAM within a period of time other than one for which the transfer of video data is effected from the one VRAM to the other VRAM. This increases the period of time within which the one VRAM is accessible by the system and, thereby, enhances high speed data processing and display of high resolution images on the display with a desirable quality.

Abstract: A display panel having N scanning lines to which scan signal are inputted and M data lines to which information signals are inputted, includes transistor groups each connecting in common plural (n) scanning lines among N scanning lines, and a selector for selecting one of N/n scanning line blocks divided by the transistor groups.

Abstract: A device for both entering and displaying information includes imaging circuitry in which a plurality of elements each has a visual characteristic which is visible at a writing surface and which depends on electrically stimulating the element via conductive circuitry, the imaging circuitry is arranged to produce electrical manifestations at the conductive circuitry in response to writing stimuli, and the device also includes control circuitry which delivers electrical signals to the conductive circuitry to form an image and converts the electrical manifestations into digital form.

Abstract: A flat panel display monitor which may be secured to a wall includes structure for interacting with a data input device. The monitor further includes a housing and a flat video screen attached to the housing. A support assembly is included for supporting the screen relative to the housing in any one of at least three different positions with respect to the housing.

Abstract: A color plasma display panel making use of a multiple layer substrate includes a glass plate arranged with an inverse frusto-conical discharge space, an anode formed on the upper surface of the glass plate in the inner central part of the discharge space, a thin glass plate provided with a circular hole through which the discharge space extends in its position on the glass plate, three cathodes formed annularly in the inner surface of the thin glass plate at a regular angle with the anode as the center, an insulation substrate provided with a circular hole through which the discharge space extends on the thin glass plate and a front glass substrate arranged on said insulation substrate so that a R, G, B fluorescent substance may be formed at the bottom to confront with the three cathodes.

Abstract: Apparatus and method is disclosed for automatically, or by selective response, call forwarding a message to one or more system pagers which have an acknowledge back capability.In one embodiment, disclosed apparatus automatically forwards a message to another system pager upon the initially called pager failing to acknowledge back within a predetermined time period. Such other pager is determined from a set paging hierarchy included within the paging terminal apparatus itself.In another embodiment, wherein the system pagers have multiple acknowledge back response capability, a called pager can request the received message be additionally call forwarded to one or more other system pagers in accordance with the particular acknowledge back response chosen by the called pager user.

Abstract: A segment arrangement suitable for a Celsius and Fahrenheit clinical thermometer comprises two upper digit displays and two lower digit displays. The upper digit displays can merely display four figures "3", "4", "9", and "10". The lower digit displays can display "00" through "99" figures, so as to display 35.0-42.0 degrees Centigrade and 96.8-105.8 degrees Fahrenheit. The two upper digit displays have such a specific configuration that a first digit display is provided which comprises a vertical major segment and a second digit display is provided which comprises two vertical minor segments, three horizontal segments, and one vertical major segment. The vertical major segment of the first digit display is electrically coupled to one of the two vertical minor segments.

Abstract: The touch panel system of the present invention is adapted for use with a rectangular screen for locating an object placed adjacent the face of the screen. The touch panel includes first and second sources of directional beams, first and second movable beam deflectors positioned in spaced relation to one another, and being movable in a scanning pattern for causing the first and second beams each to be deflected in a scanning pattern which sweeps angularly in a predetermined sweep time interval across the face of the rectangular screen. A reflector is positioned around the screen in such a manner as to be in the path of the beams as they are deflected by the first and second deflectors, and being capable of reflecting the beams at an angle of 180.degree. with respect to the angle at which they strike the reflector. First and second scan detectors are used to detect the end of each sweep of the beams.