Abstract: An interlaced raster-scanned color cathode ray tube display in which flicker is reduced by temporally off-setting one of the colors (preferably red) so that normally even-field data for that color is displayed in the odd field and normally odd-field data for that color is displayed in the even field. The temporal shift can be either before or during storage of the bit patterns or during or after reading of the bit patterns.The resulting positional shift of one scan line of the temporally shifted color is compensated for by using the static and/or dynamic convergence circuitry.

Abstract: An apparatus for displaying the display outputs of a plurality of simultaneously active computer processes in corresponding windows on a single screen includes a microcomputer, a display screen and display system software. The software represents a plurality of virtual terminals, one corresponding to each active process, for emulating the operation of real terminals communicating with the processes. Each virtual terminal maintains a display list comprising a set of instructions defining a display on a screen according to the output from the corresponding process. The software also includes a screen process for maintaining a subrectangle list comprising a set of instructions for allocating window portions of the screen to the displays defined by the separate display lists. A display list processor is provided for creating the windows on the screen according to the display and subrectangle lists.

Abstract: An infrared touch input system is taught. Briefly stated, the system comprises a four-sided frame having an infrared transparent bezel along the inside thereof and having infrared emitters along the top and one side of the frame with infrared detectors along the sides opposite the emitters. Darlington transitor arrays are used as source and sink drivers for driving the LED's in an array. The I/O lines of a microprocessor in conjunction with the source and sink drivers are used to selectively energize each LED. Additional I/O lines of the microprocessor in conjunction with BCD decoders are used to selectively energize corresponding infrared detecting phototransistors before, during and after LED turn-on. A host computer supplies a clocking signal for the microprocessor with programming in the microprocessor thereby automatically performing the selection and deselection of emitters and detectors.

Abstract: An information display system comprising a computer device having at least one input member for receiving video information and a processor member connected to said input member for processing and/or controlling digital video information contained in and/or obtained from the video information received from the input member and/or digital video information produced by the computer device itself in order to produce display data and control-signals, a communication channel comprising a data bus connected to the processor member of the computer device and a control bus for the transmission of the display data and the control-signals respectively, a memory device connected to the data bus for storing display data received from the data bus, a memory control-device connected to the control bus for controlling the storage of display data in and reading stored display data from the memory device in response to control-signals received from the control bus, a digital/analogue converting device connected to the memory

Abstract: A wide picture with on-the-scene feeling is displayed on multiple CRT screens by using a method which is suitable for video game machines to enhance a player's satisfaction. Data is read from a static memory and from a dynamic memory and is displayed in synchronism at corresponding points of the CRT's.

Abstract: A system for the storage, retrieval and manipulation of significantly large amounts of data to produce highly complex and visually pleasing graphics within the time constraint of a full motion video raster scanning system by storing memory data corresponding to each of the individual object elements to be displayed over a period of time, storing lists of identification and display instruction data with respect to those object elements, selecting desired identification and display instruction data for selected display elements appropriate to a particular instant of time and placing such selected data into an appropriate memory, and then creating, from those selected instructions and from the stored data relating to the selected object elements, display data which, in real time, produces the desired display. The initially stored identification and display instructions are preferably in the form of a linked list with the items in each list arranged in order of desired visible priority.

Abstract: A switchable color filter comprising a pair of twisted nematic liquid crystal devices (126 and 128) and a light polarizing system (108) which includes three color selective polarizing filters (102, 104, and 106) is incorporated as an optical subassembly in a field sequential color display system (100) to provide output states of white light and light of three different colors to form an image in full color and high brightness with strong color contrast.

Abstract: In an image displaying field where there is a tendency which will increase the data to be handled in accordance with the high integration of a display device, a CRT controller according to the present invention improves the superposed display and the responsiveness of the display and drawing operations by dividing a unit clock into a predetermined number to function with high speed and a multifunction display. When image data are to be inputted to or outputted from a refresh memory corresponding to a display frame, the memory content and the display address are assigned at a ratio of 1:n to effect the processings in parallel. As a result, the time period utilized by the display cycle of the prior art can be assigned to the drawing operation so that the processing can be speeded up while making it easier than the prior art to effect the superposed display of letters, symbols and drawings.

Abstract: An image display apparatus comprises: a computer unit for reading out dot data of an image pattern from a character generator and writing into a bit map type graphic memory; a CRT controller for reading out the dot data from this bit map type graphic memory and displaying on a CRT monitor; and a time sharing control circuit for time sharingly controlling the access from the computer unit to the bit map type graphic memory and the access from the CRT controller to this memory. The character generator is provided with a ROM which is constituted such that a dot matrix of one character pattern is segmented on a byte unit basis in the horizontal direction of raster and these segmented sub-patterns are continuously stored in this ROM in the vertical direction of raster.

Abstract: A method for controlling a plurality of windows for displaying card images wherein the card images are arranged lengthwise on a display unit. In the case where there is a window above an active window, there is a cursor displayed in the active window, the cursor is moved up and a down-scrolling operation is performed upon the active window until the first row of a card image reaches the row immediately above the boundary row between the windows. If the cursor is moved further up, the boundary row is moved up. Similarly, in the case where there is a window below an active window, the cursor is moved down and an up-scrolling operation is performed upon the active window until the bottom row of a card image reaches a row immediately below the boundary row. If the cursor is further moved down, the boundary row is moved down.

Abstract: A displaying apparatus using a raster scanning type display such as a CRT, wherein vertical and horizontal positions are addressed respectively by an address counter for displaying an image stored in a character memory containing a matrix of horizontal and vertical dot information. Start address data, for locating the position of the image on the display, is loaded into vertical address and horizontal address counters which are then incremented by a carry output from horizontal and vertical adders respectively associated with the horizontal and vertical counters. The adder for the vertical address counter repeats adding operations according to predetermined addend data four times in one horizontal blanking period and twice in one vertical blanking period. The adder for the horizontal address counter repeats adding operations according to predetermined addend data at intervals selected to be a fraction, e.g. 1/4th, the usual horizontal dot interval.

Abstract: In a computer system comprising a computer having a keyboard, and a display device connected to the computer, an improved position indicator means comprising a mouse having means responsive to movement thereof over a support surface for generating electrical signals indicating the positioning of the mouse, power source means carried by the mouse, circuit means powered by said power source means for generating and transmitting radio signals corresponding to said electrical signal, and processing means associated with said computer for receiving said radio signal and converting said radio signal into a display on said display device positioned corresponding to the positioning of said mouse.

Abstract: In a color liquid crystal type electronic instrument panel, the quantity of light to be radiated from a background light source is changed in accordance with a color to be displayed. The color liquid crystal type electronic instrument panel is of the type that a plurality of plural-primary-color stripe filters are disposed on each segment of a display element in the longitudinal direction of the segment; a voltage is applied to electrodes corresponding to the stripe filters having a color selected based on the contents to be displayed, and the background light source is positioned at the back of the display element to enable color-displaying. A device for detecting the brightness of outdoor light is further provided in the liquid crystal display type electronic instrument panel, wherein the quantity of light to be radiated from the background light source is changed in accordance with a detected signal by the detecting device.

Abstract: A dot character display apparatus includes a control circuit for transferring data corresponding to character body and upper and lower symbols from first to third character generators to image buffers, a drive circuit for driving a dot matrix display section on the basis of the data stored in the image buffers. The dot matrix display section has an upper display area to display the upper symbol, a central display area to display the charcter body, and a lower display area to display the lower symbol. The drive circuit has a first drive section to drive the central display area of the dot matrix display section in accordance with data indicative of the character body from the first character generator, and a secod drive section to drive the upper and lower display areas of the dot matrix display section in accordance with data representative of the upper and lower symbols from the second and third character generators.

Abstract: The present invention is a technique for changing the contrast in a limited area of a digital image having a plurality of pixels of differing tone levels and at the same time maintaining a constant average level intensity of the pixels within the limited area by isolating a portion of the pixels and selectively altering the contrast of tone levels between pixels.

Abstract: A display device for displaying numerical results of athletics and/or games and the like formed from a rear support panel attached to a front cover of colored transparent sheet material by a surrounding frame forming a shallow box. The transparent sheet material is removable by sliding from the overall unit to reveal the printed circuit boards laid out there below.Within the box printed circuit boards are removably secured each having mounted thereon a plurality of light emitting diodes arranged in the form of a bisected parallelogram so that by selectively energizing groups of the light emitting diodes, different sections of the bisected parallelogram can be illuminated to display different numerals in the range 0 to 9.A control unit is connected to the display unit having switching devices which can be set to cause different patterns of light emitting diodes to become illuminated.

Abstract: A method is disclosed for creating simultaneously viewable coarse and fine resolution displays, respectively presenting an "entire image" with coarse resolution of detail and a selected portion of that image in an enlarged view with fine resolution of detail. The method also provides for creation of cursor and crosshair images overlying the portion of the coarse display selected for enlarged viewing, and creation of an enlarged crosshair image overlying the enlarged display. The cursor image is in the form of a rectangle outlining the portion selected for "magnified" viewing in the fine display segment. The crosshairs provide relatively scaled position references on the coarse and fine views for enabling operators to accurately locate points within fine segments for specification to a computer system.

Abstract: A visual display system that provides a high speed method for reading data from a pixel memory, modifying it if desired, and then writing data into the memory. This READ/MODIFY/WRITE is accomplished by providing a RAM look-up table having a number of addressable locations. The output from one addressable location is data representative of the color/intensity of the vector being drawn, the output from other addressable locations is data representative of a desired highlight color/intensity, and the addresses of the table correspond to the data representative of the different colors/intensities. The portion of the pixel memory corresponding to the pixel to be drawn is read to an address to the RAM, and the resulting data output from the RAM is written into the pixel memory register.

Abstract: Method and apparatus for generating data for a skeleton pattern of a character and/or a painted character pattern are provided. A dot matrix pattern representative of a character pattern is stored in a memory and it is displayed on a display device, positions of a plurality of skeleton points for defining a skeleton line position of each of line segments on the displayed dot matrix pattern are specified on the display screen. Kinds of basic elements for the respective line segments are entered by an operator. Lines connecting the skeleton points of the respective line segments are superimposed on the dot matrix pattern as skeleton lines and they are displayed in a distinguishable form. A character outline pattern corresponding to the skeleton lines or a painted pattern thereof is generated based on the input skeleton point positions and the kinds of line segments.

Abstract: A drive circuit for sequentially driving electrodes of a matrix display device such as a liquid crystal display panel comprises a shift register divided into a plurality of groups of shift register stages and means for selectively applying a first clock signal and a second signal to the groups of stages, so that the groups become successively operative and so that power consumption of the currently inoperative groups is minimized. The second signal can comprise a low-frequency refresh clock signal, in the case of a dynamic type of shift register, or a DC potential in the case of static-type shift registers. During changeover between adjacent groups of shift register stages, the first clock signal is applied simultaneously to both groups, in order to ensure stable operation.