Abstract: A display monitor includes a conventional CRT and associated display drive circuitry together with conventional horizontal and vertical deflection systems. A high voltage system is operated in response to the horizontal deflection system to produce a CRT accelerating potential. A display size control responds to changes of high voltage system current to produce an error signal which is used to produce compensating amplitude changes of vertical and horizontal deflection currents in order to maintain substantially constant image size.

Abstract: An active matrix board comprising: an electrically insulating transparent substrate; a pixel electrode disposed in two dimensions on the substrate for each pixel; a scanning electrode arranged in common to the pixel electrodes disposed along a predetermined direction; and a switching element disposed between each of the pixel electrodes and the scanning electrode. The switching element is constituted from a thin film two-terminal element which is composed of a first conductor, a second conductor, and a hard carbon film. The hard carbon film is disposed between the first and second conductors. The element has a standard deviation of current distribution in a surface of the substrate when applied with a predetermined voltage which deviation is less than 35% of the current average.

Abstract: A video memory includes a data storage section having a predetermined bit width of data writing and reading. A data input terminal has a predetermined bit width and is subjected to input data which represents at least a write start position and a write end position. Mask data are generated on the basis of the write start position and the write end position represented by input data. The mask data are fed to the data storage section. Write data are generated. The write data are fed to the data storage section. The bit width of data writing and reading of the data storage section is greater than the bit width of the data input terminal.

Abstract: A large scale electronic display board system for displaying images in response to an image signal. The system has a light emitting diode (LED) display for displaying images in multiple gray levels. The LED display has an N.times.M array of LEDs. Each LED has a corresponding driving circuit which linearly controls the gray level of the LED.

Abstract: A method and apparatus that distinguish a valid touch from an optical aberration caused by unwanted objects and/or scratches in the light plane of an optical touch panel device is disclosed. During a training mode the device learns the relative position of "aberration dropouts" caused by the unwanted objects. During normal operating mode the relative positions of "touch and aberration dropouts" are generated and compared with the relative position of aberration dropouts to distinguish between aberration dropout signals and touch dropout signals. The touch dropout signals are subjected to further processing to determine the precise location of a touch while the aberration dropout signals are discarded.

Abstract: A cursor display control in a graphic display system is provided in which a storage range is provided for exclusive use for a cursor pattern and a desired shape is defined in the storage range to thereby perform a high-speed cursor movement. A display control apparatus in the graphic display system includes a memory for storing a cursor pattern, shift register for performing a shift processing in a non-display period of the cursor for positioning in the display screen, and parallel-serial converter for performing parallel to serial conversion at the display timing of the cursor, whereby the apparatus is suitable to be integrated in the form of an LSI and the cursor can be moved at a high speed on the screen.

Abstract: A low power, dual mode BIMOS circuit generates a required drive voltage for illuminating an electroluminescent display panel from a low voltage, preferably a single cell. The BIMOS circuit comprises at least one bipolar transistor, at least one MOS transistor, an output voltage sensor, and a controller operating in a complementary fashion to disable a first clock signal coupled to the at least one bipolar transistor subsequent to enabling operation of the at least one MOS transistor for controlling the charging current used to generate the output voltage.

Abstract: The touch panel mof the present invention comprises a plurality of beam emitter-detector pairs disposed around the perimeter of a video display area. The emitters direct energy beams toward the detectors which are located directly opposite across the display area from the emitters. A programmed central processor is connected to the emitters and is programmed to serquentially scan the emitters for actuating the emitters one at a time to create a modulated energy beam which is intermittently turned on and off for predetermined periods of time at a predetermined frequency. The detectors sense the modulated energy beams and create an electrical signal which is fed through a comparator and then to the central processor so that the central processor can analyze and determine the location of any blockage which appears on the screen.

Abstract: An active display device with picture elements (9) arranged in a matrix is driven via active switches (1). Part of the picture electrodes (9) are driven via light per actuated switches (9) between the picture electrodes and a read-out electrode (5).

Abstract: A bus structure for coupling pixel data to control a raster-type display of objects that are represented by the pixel data in storage operates in real time to assemble pixel data for each pixel-count interval from the pixel data in a plurality of memory segments that are connected in cascade. Priority of displayable overlapping images is restored by comparing priority data stored with associated pixel data to transfer from memory and along the bus structure the pixel data for a pixel-count interval that has the highest associated priority data.

Abstract: A data communication apparatus comprises: a memory to store data which is sent from a station for requesting the repeating multiple-address transmission; a transmitter to transmit the data stored in the memory to a repeating multiple-address reception station; a discriminating circuit to discriminate whether the transmission from the request station has been performed via a first route or via a second route; and a deciding circuit to decide whether the repeating multiple-address transmission is performed to the repeating multiple-address reception station or not on the basis of the discrimination by the discriminating circuit. The first route is the route via the telephone network for use in communication of voice and data. The second route is the route via the data communication network only for use in data communication.

Abstract: Disclosed is an X-Y direction input device for moving a cursor on a screen in a suitable direction, the device comprising a rotatable rotation operating member, a first rotary type electric part for detecting a rotational amount of the rotating operating member, a slide operating member capable of being reciprocated in a direction of a rotational axis of the rotation operating member, and a second rotary type electric part for detecting an amount of movement of the slide operating member.

Abstract: A modulated touch entry system and corresponding method for detecting the presence and location of a member within an irradiated field. A touch entry system and corresponding method are disclosed which utilize modulated pulses of light from light emitters, such as light emitting diodes, which are detected by corresponding light detectors, such as phototransistors. The light emitters and the corresponding light detectors are arranged around a frame to provide an irradiated field. The system utilizes circuitry to precondition a signal from the light detectors prior to analyzing the presence of a "hit"; i.e., the presence of a member within the irradiated field. The circuitry includes a differential amplifier and a programmable amplifier, which consists of a digital to analog converter, a current to voltage converter, and a gain stage, to precondition the signal from the light detectors.

Abstract: A system and method for translating vector description displays into raster images writes the vector description image, having some number of displayable colors, into more than one intermediate image file. Each intermediate image file can define only a number of colors which is smaller than the number of colors in the original display. Separate color translation tables are used to generate each intermediate file. Proper selection of the color translation tables causes each intermediate file to contain a portion of the full color information. The intermediate files are translated to intermediate raster files which are then combined into a single raster image which retains all of the colors of the original vector description image.

Abstract: The graphics data processor of the present invention offers as a single instruction in its instruction set a draw and advance operation. A first data register stores a set of X and Y coordinates. In a first embodiment, a predetermined color code is stored at the pixel address of a bit mapped display memory indicated by the X and Y coordinates the first data register upon execution of the the draw and advance instruction. The X and Y coordinates stored in the first data register are then advanced by addition of X and Y coordinates stored in a second data register. A second embodiment is similar except that the color code stored at the X and Y coordinates of the first date register is recalled for combining with the predetermined color code and the combined result stored at that pixel location. The predetermined color code is preferrably stored in another data register.

Abstract: This invention relates to a display apparatus for alphanumeric displays having a display panel. A controllable light source illuminates a bundle of optical fibers and in which one switch element is triggerable from a control line. The switch element is introduced into each light path leading from an optical fiber to a display element, and with the switch element the associated light path can be selectively opened or blocked. A multi-color representation of the displays is attained by each display element of the display panel having a variable number of light paths. The display elements are disposed in the same variable number of internested matrices. The optical fibers associated with one matrix are joined into bundles and are illuminated by separate light sources.

Abstract: A point-of-purchase illuminating display comprises a vertical display panel having three sets of lights mounted to its front surface. A first set of lights is spacially arranged around a left side of the display panel perimeter. A second set of lights is spacially arranged around a right side of the display panel perimeter. The third set of lights is arranged in the shape of an arrow pointing upward and is positioned on an upper portion of the display panel between the first and second sets of lights. A digital control circuit controls sequential illumination of the first and second sets of lights beginning from the bottom middle of the display panel and sequencing around the left and right sides of the panel to the top mmiddle portion of the panel. Following the sequential illumination of the first and second sets of lights, the third set of lights is simultaneously illuminated twice by the digital circuit control. The control circuit then resets to or repeat the cycle.

Abstract: A computer system having a digitizing tablet overlaying the display screen. The tablet serves as a user's primary input device. Various features of the system make it possible for the user to run and interact with standard programs designed for keystroke and mouse input and not designed for use with a tablet. In addition to the main processor, on which the user's programs are executed, there is an interface processor. In addition to a standard display buffer, there is an ink plane buffer for interface display data that is combined with the data from the standard display buffer on a pixel-by-pixel basis according to data from a mask plane buffer. The interface processor manages input from the tablet, presents feedback to the user by means of the ink and mask planes, and provides keystroke and mouse data to the main processor as if from a standard keyboard controller. The interface processor presents the user with a collection of simulated devices, including standard devices such as a keyboard and a mouse.

Abstract: A process for regulating the brightness of a microdot fluorescent screen and apparatus for performing this process. The screen is of the matrix type and is addressed by a scan of the rows, a pixel being formed at each row-column intersection. For an illuminated pixel, for a selection time T of the corresponding row, a quantity of charges is emitted by the associated microdots. The brightness is regulated during the selection time of each row by controlling the quantity of charges emitted by the microdots of each pixel to be illuminated, the charge quantity being identical for each pixel.

Abstract: A driver IC of a light-emitting diode array head for an electronic photograph printer includes a current mirror circuit having a reference element and at least an output element so as to produce a reference current by use of a digital signal as an input thereto, a reference current source capable of outputting a plurality of reference current values, a selection circuit for specifying and selecting one of a plurality of reference current values from the reference current source, to be applied as an input current to the current mirror and an output control circuit for controlling the on and off states of an output current to be supplied to the output element of the current mirror circuit in accordance with a light emission control signal externally supplied.