Abstract: A graphics display unit providing rapid filling of predetermined areas of the display screen with one or more predefined repetitive patterns stored in the undisplayed portion of a frame buffer memory. The picture processor in executing a display list will encounter commands to load the predefined patterns(s) into the undisplayed portion of the frame buffer memory. The pattern is copied or replicated from there across the entire width of the frame buffer, with the final replication of the pattern being truncated. The display control unit fills the predetermined shapes or areas of the image to be displayed with the pattern(s) thusly loaded into the frame buffer memory, by copying sections of the scan lines of the replicated pattern up into the displayed section of the frame buffer specifically defining the shape to be filled-in. Pattern alignment between contiguous areas to be filled in with that pattern, is provided.

Abstract: An electrochromic matrix display of the kind in which the display electrodes are supported on a substrate above a corresponding matrix of transistor switches employs constant current writing and potentiostatic erasure. The transistors are switchable by signals applied on respective gate lines to pass electric current on the respective drive lines to their display electrodes. Gate and drive selection means define the active gate and drive lines During erasure, the potentiostatic erase voltage is applied to both ends of the selected drive lines simultaneously to speed up the current limited asynchronous erase operation. Optionally, the display may be driven alternately from opposite ends of the drive lines during a line-by-line writing operation.

Abstract: A method and apparatus for producing a color strip display of eddy current test data from a signal produced by an eddy current detector and which varies in amplitude and in phase relative to a reference signal as the detector is displaced relative to a test body. In order to produce the display, a signal representative of the relative displacement of the detector, a signal representative of the amplitude of the detector signal, and a signal representative of the relative phase of the detector signal are produced and the representative signals are supplied to a color display device for producing a strip display which extends along a path determined by the signal representative of the relative displacement of the detector, has an amplitude perpendicular to the path which is a function of the signal representative of the amplitude of the detector signal, and has a color the hue of which is a function of the signal representative of the relative phase of the detector signal.

Abstract: An array of addressable, electrically isolated, light emitting diodes are fabricated in the substrate of a monolithic device. Discrete regions of the array constitute respective pixels of the array. Each array pixel has at least three diodes. Two diodes are commonly addressable and a third diode interleaved between the commonly addressable diodes is separately addressable. Each diode of an array pixel, when addressed is forward biased and produces output light which is emitted from its pixel and forms a light image on a corresponding pixel of an image zone. The selectively addressing of the LEDs of the array pixels causes the addressed LEDs to emit light and provide different gray scale light images at corresponding image zone pixels.

Abstract: A color liquid crystal display device such as a television receiver employing an array of R, G and B color filters and corresponding liquid crystal display elements, having the color filters arranged in different sequences in mutually adjacent scanning lines, and having a line memory in which display data for the R, G and B display elements of each display line are successively stored and applied to a drive circuit, is provided with color signal processing circuits for controlling R, G and B digital color signals which act to set these color signals into the line memory at the start of each horizontal scanning interval in a correct array sequence for the line of display elements which will be driven during that horizontal scanning interval.

Abstract: In a matrix display device, non-linear resistance elements are coupled to each display element for controlling selective activation of display elements in response to drive signals, with each non-linear resistance element comprising sets of rectifying elements formed by thin film deposition which are connected in parallel with one another with opposing polarities. Each set comprise one or more rectifying elements formed of for example PN junctions, PIN junctions, Schottky junctions, etc., using material such as amorphous silicon as a semiconductor material, and the rectifying elements can be disposed in a multilayer configuration in order to reduce the display area occupied, or can be provided with transparent electrodes to positively utilized incident light to enhance current flow.

Abstract: A liquid crystal display system is comprised of a control system and a display circuit. The control system selectively generates first address signals and first mode control signals during a first mode of operation and second address signals and second mode control signals during a second mode of operation. The display circuit includes a matrix of display means and diode decoding means. Each of the display means comprises a field effect liquid crystal cell having first and second inputs and a diode switching array selectively coupled to the first and second inputs, with the diode decoding means selectively coupled to each diode switching array. During the first mode of operation, the first address signals and first mode control signals are selectively applied to the diode decoding means to selectively cause preselected cells to charge in a first direction through the associated diode switching arrays.

Abstract: A visual display system having a restricted data display capability incorporating a main buffer store (1) having a storage capacity for data lines greater than the display line capacity of the display (2). Status information signals from a control unit 14 are associated with each line of data as it is introduced into the display so that when the display is scrolled or racked to free data display lines for new data--the status signal effectively decides whether a line of data is discarded or fed into the main buffer store (1).

Abstract: In driving a thin film EL display panel providing the matrix arrangement of translucent data electrodes and metal scanning electrodes, the data pulse is supplied to the selected translucent data electrodes in such a relation that it rises in advance of the scanning pulse to be supplied to the opposing metal scanning electrodes. Thereby, fluctuation of brightness due to the influence of electrode resistance of the translucent data electrodes can be eliminated, and a uniform and distinct display can be attained.

Abstract: A structure for housing a data terminal device having a printer and a disk drive memory unit includes a rear portion having a cover member covering the printer and a display member rotatably mounted on a front portion of the housing structure for movement to a viewing position covering the front end of the disk drive member from view. A locking mechanism is included to allow the cover member to be unlocked using a first key member and for unlocking the display member from the viewing position using a second key member wherein the display member is moved to a position allowing access to the disk drive memory unit to occur.

Abstract: The present invention provides an image display apparatus including an image bearing web in the form of an endless belt on which an erasable image is formed, the image being carried into an image display section for observation. If the image bearing web is photosensitive, it is affected by the light, resulting in the deterioration of the image formed. To avoid this, the length of the image bearing web which is used to form one complete image is made equal to the full length thereof divided by an integer. Therefore, that position on the image bearing web which is used to form an image to be displayed is not changed for each display to limit the portions of the photosensitive web exposed to light to predetermined areas, thereby avoiding the occurrence of the difference in image quality within each of the predetermined areas.

Abstract: A field effect display system is comprised of a control system and display circuitry. The display circuitry includes an m by n array of field effect picture elements, a plurality of associated diode arrays respectively coupled to the array of field effect picture elements and diode decoder circuitry selectively coupled to the plurality of diode arrays. The control system is controlled by a microcomputer to selectively develop P-column address, N-column address and row address signals in P and N modes of operation. Drive decoder circuitry in the control system is responsive to each row address selectively generated during either a P- or an N-mode of operation for selectively causing an associated one of m drive circuits to enable all of the field effect picture elements in an associated one of m rows of field effect picture elements.

Abstract: A high-speed electro-optical light gate (40) includes a pair of matched variable optical retarders (54 and 56) positioned between a pair of light polarizing filters (42 and 44) to promote rapid switching between optical transmission states for light rays of the wavelength to which the variable optical retarders are tuned. The projections (62 and 66) of the optic axes of the variable optical retarders are orthogonally aligned so that the response time characteristics of the transitions between optical transmission states of the light gate reflect only the turn-on time response characteristic of the variable optical retarders. A field sequential color display system (78) incorporates a switchable color filter (80) which utilizes the alignment configuration of the variable optical retarders of the light gate to provide light output states of white light and light of three different colors to form an image in full color.

Abstract: A method and apparatus for producing a display of eddy current test data from signals produced by an eddy current detector which is supplied with an alternating current signal composed of alternating currents at several different frequencies, the detector signals including a respective signal associated with each current frequency and varying in amplitude and in phase relative to its associated alternating current as the detector is displaced relative to a test body.

Abstract: A color cathode ray tube has raster scan color zones defined by X and Y positional signals derived from a stroke vector generator and stored in a digital memory. Raster scan and stroke vector displays are alternately presented in a hybrid display. The display face of the tube is scanned by a plurality of raster lines and a color transition point is defined by the intersection of a stroke vector with a raster line. The X and Y addresses of the intersection points define the raster line, pixel element, and color at the transition point. The system is arranged so that the X and Y addresses are provided by the stroke vector generator in synchronous relation with the color transition points, and read into memory during the stroke vector refresh period. During the raster scan refresh period, the memory contents are recalled in synchronism with the raster scan, passed through a digital to analog converter, and then applied to the display tube to provide filled-in color zones superposed on the stroke vector display.

Abstract: A method of driving a matrix display device in which each display element (e.g. a liquid crystal display element) is connected in series with a non-linear resistance element, utilizing row scanning signals which vary periodically between 4 different potentials, the potentials being selected such that an alternating bias potential is applied to each display element both in the non-activated and in the activated state thereof, and such that satisfactory operation can be attained using non-linear resistance elements having a threshold voltage which is considerably lower than has been practicable in the prior art, e.g. with the threshold voltage of a single PN junction being utilizable.

Abstract: The present invention includes a microprocessor which acts to generate groups of its signals from its read only memory (ROM) thereby forming character representations of groups of coded signals, such as ASCII coded signals, coming from a main data processing device. The groups of bit signals are temporarily stored in a buffer which at a subsequent time transmits, in parallel, groups of said bit signals to a bit map memory through some logic circuitry. The group, or block, transfer of said bit signals in parallel, occurs during horizontal or vertical blank periods. The parallel transfer during the blank periods provides part of the basis for acceleration of the data to a display device as compared with the prior art. In addition, the microprocessor provides address information signals to a graphic display controller, which in turn provides starting addresses, for the locations of the bit signals.

Abstract: A thin-film transistor circuit used to drive a liquid crystal display device is disclosed, which circuit includes a plurality of circuit components which are arranged in the form of a matrix as to be connected with data lines for supplying an image signal and with address lines for supplying a gate pulse signal, whereby the circuit components control the picture element display in the unit picture element region of the LCD device. Each circuit component has a capacitor connected to the unit picture element region for temporarily storing the image signal, and a TFT transfer gate having a gate electrode connected to one of the address lines, a source electrode connected to one of the data lines, and a drain electrode connected to the capacitor. The transfer gate performs the switching operation in response to the gate pulse signal, thereby transferring the image signal to the capacitor.

Abstract: A graphic display unit having a shifting circuit for shifting a picture image to a designated position on or off a display panel, the shifting circuit including a signal delaying circuit for delaying a divided clock signal obtained by dividing a main clock signal and for delaying a display timing signal in accordance with the designated amount of shift of the picture image, whereby, in response to the delayed divided clock signal and the delayed display timing signal, the data of the picture image is read from a graphic random access memory.

Abstract: A liquid crystal display device having a first transparent substrate, a second transparent substrate and a liquid crystal composition sandwiched between the first and second transparent substrates. The first transparent substrate has a plurality of first main electrodes and a plurality of first auxiliary electrodes extending from the first main electrodes. The second transparent substrate has a plurality of second main electrodes. The second main electrodes are positioned so that the second main electrodes have mutually confronting portions with the first main electrodes, defining main pixels therebetween, and with the first auxiliary electrodes defining auxiliary pixels therebetween. The presence of the liquid crystal composition between the first transparent substrate and the second transparent substrate in the regions of the main pixels and auxiliary pixels allow an image display in the main pixel and auxiliary pixel regions.