Abstract: A method is provided for optimizing the contrast and the angle of view of a liquid crystal display, this method consisting in periodically energizing a given zone of the display, permanently measuring the luminance of this zone so as to obtain at all times a pair of values corresponding respectively to the luminance of the zone in the energized state and to the luminance of the zone in the de-energized state, determining the contrast from the values of each of said pairs each of the measured luminance values and adjusting the control voltage of the cell display as a function of the contrast thus defined.

Abstract: A system for computer cursor control, interactive draw graphics, and interactive data entry in which changes in the angular orientation of a computer mouse device as well as changes in its location of a flat surface are used to control the angular orientation of a cursor or pointer on a computer display screen, the angular orientation of objects and text on a computer scene, and/or values or variables in computer applications programs.

Abstract: A multicolor display system comprised of a matrix of light-emitting diodes (LEDs). Each display dot or pixel is comprised of one red LED and one green LED. The display data is stored in a selected one or more discrete locations of a random access memory as a bit map, depending upon the desired display color. Each memory location is associated with a particular primary color "field" (e.g., red or green). The bit map indicates which of the LEDs is ON and which is OFF in order to display selected data. The data associated with each field is displayed sequentially during a display cycle so that the relative mixture of red fields and green fields determines the resulting display color. The duty cycle of each LED is therefore controlled in software, which reduces the need for complex hardware such as voltage drivers and counters needed in prior art multicolor display systems.

Abstract: In a filing system having a storage device for storing image information and a display with a rectangular screen for visually displaying the stored image information, the screen is arranged to be positioned at an upright position or at a lateral position, with a motor. The switch between two positions of the screen is effected upon instruction input from a keyboard, or in accordance with the information representative of the screen position which is stored beforehand in the storage device for each of the image information. The screen is also provided with a tilting mechanism which is released while the screen rotates. There is compensate circuit compensating for a positional displacement of a displayed image caused by a difference of earth magnetism between two positions of the screen.

Abstract: An active-matrix addressed LC display device includes a row and column array of display elements (12) each controlled by two transistors (TA, TB) selectively operable by switching signals applied to respective adjacent row conductors (R) to supply to the display elements data signals from column conductors (C). Each row conductor (R) is associated with two rowss of display elements (12) and each display element has a storage capacitor (SC). The storage capacitors of each row of display elements are provided by a respective supplementary conductor (RS) extending beneath, and insulated from, electrodes (14) of the display elements. A supplementary conductor is formed as an extension of a row conductor (R) associated with a preceding pair of adjacent rows of display elements. The supplementary conductors are interconnected to their row conductors at one end of the rows, and preferably, for redundancy purposes, also at the other end, by respective bridges (30, 31).

Abstract: A picture information display device for displaying at high speed a plurality of picture in windows in a display unit. A frame memory is used for storing the display information corresponding to a display surface of the display unit. There is a window memory for storing the picture information of the window. A control circuit outputs address signal corresponding to the scanning position of the display unit to the frame memory and window memory when the movement or scrolling of the window is detected that the window is moving condition the frame memory and window memory to output the display information and stored in the address represented by the address signal and the picture information in the moving window.

Abstract: In accordance with a write address successively updated in synchronism with a dot clock, color display data is written into a memory. The memory includes three memory corresponding to three primary colors and having identical addresses thereto assigned. For the purpose of color display, the written display data is read out three times consecutively during one write clock interval. A read address generator for supplying a read address successively changed to the memory is reset when addresses have been generated up to the number of horizontal display dots. The resetting is performed when the number of horizontal display dots detected from the dot clock and a display timing signal has coincided with a read address signal outputted from the read address generator.

Abstract: A computer display screen monitoring system comprising a master station and a plurality of user stations for displaying text and graphic data appearing on one display screen in the system on one or more other display screens in the system in real time. Multiplexers are provided in each of the stations in the system for selectively transferring video as well as audio signals (when provided) between the stations in response to function codes and addresses identifying the stations.

Abstract: An electrophoretic display apparatus has grid and cathode conductors arranged as an X-Y matrix spaced from an anode with an electrophoretic dispersion in between them. Pigment particles in the dispersion become charged at selected intersection areas of the X-Y matrix and migrate towards the anode to form a display image thereon by biasing the cathode negatively with respect to the anode, and the display image is erased by oppositely biasing the cathode and anode. The anode is formed with a multiplicity of parallel anode line segments corresponding to image lines of the display, and control circuitry is provided for individually controlling the potential applied to each anode line segment in order to allow selective erasure of one or more lines and rewriting of only those lines. A new image frame having a substantial portion thereof the same as a previous frame can thus be rewritten in a shorter time.

Abstract: A method of providing IC layouts for a family of LCD drivers including the steps of separating the driver into a front end section and a driver section, determining the number of backplanes and frontplanes and the number and size of voltage levels required, generating a resistor ladder voltage generator with the required number and size of levels, generating individual cell layouts for each of the major components, and building pitch matched layouts of the components from the cells.

Abstract: In a system having a frame buffer for generating an image wherein the image is defined as an outline having an interior described by the non-zero winding rule, the system including the mehtod of providing visual images along a scan direction comprising the steps of entering into the frame buffer predetermined direction codes, determining points of intersection and points of adjacent location in the scan direction, and spatially offsetting direction codes in the scan direction for the points of intersection and points of adjacent location in the scan direction.

Abstract: A driving apparatus includes a scanning driver circuit connected to scanning electrodes and a signal driver circuit connected to signal electrodes. The scanning driver circuit includes: (1) a drive signal voltage generating unit which includes a first signal voltage generating unit for generating a scanning selection signal voltage supplied to a first bus, and a second signal voltage generating unit for generating a scanning nonselection signal voltage supplied to a second bus, (2) a switching circuit unit for selectively supplying the scanning selection signal or the scanning nonselection signal to a scanning electrode, and (3) a switching signal generating unit for supplying a switching control signal to the switching circuit unit.