Abstract: A display apparatus for a vehicle by which the brightness of a display image can be varied readily without using a dimming circuit and a display image of a high contrast can be assured. The display apparatus comprises a light emitting displaying element for emitting visible light therefrom, and a reflecting member for reflecting visible light from the light emitting displaying element toward a driver of the vehicle directly or indirectly by way of a component of the vehilce such as a windshield. The reflecting member is selectively moved between a first position at which the reflecting member totally reflects visible light from the light emitting displaying means and a second position at which the reflecting member reflects visible light from the light emitting displaying element but at a comparatively low reflecting rate.

Abstract: The computer input device includes an elastic actuator button of generally hemispheric shape. An applied force causing an indentation in a curved portion of the button is transmitted via the material of the button to cause a corresponding elastic bulging of a bottom, normally flat portion of the button and of a conductive film and resistive film which are attached thereto. During such bulging, a portion of the resistive film is urged into contact simultaneously with two or three oppositely disposed conductive traces. This action can cause a cursor to be moved in a direction corresponding to the direction of force of the push when the device is attached to the proper circuitry. The amount of pressure applied to and transmitted through the elastic material of the button determines the size of the area of contact between the resistive film and the pattern of conductive traces and, ultimately, the speed and/or distance of movement of the cursor in that direction.

Abstract: A multimode input circuit comprises a input terminal, first outputting circuit including a buffer circuit, for receiving a first signal having a first amplitude variation via the input terminal and outputting the first signal of a preset potential; second outputting circuit for receiving a second signal having a second amplitude variation different from the first amplitude variation via the input terminal and outputting a third signal of a preset potential, the second outputting circuit including a power source supplying terminal for supplying the same potential as the maximum potential of the second signal, a first FET having a source connected to said power source supplying terminal, a gate supplied with a selection signal for specifying one of the input signals to be selected by the multimode input circuit and a drain, and a second FET formed to make a complementary structure together with the first FET and having a drain connected to the drain of the first FET, a gate connected to the input terminal and a

Abstract: A VGA controller having an overlay mode for displaying images formed from selective components of multiple image planes. A first image and a second image overlaying the first image are interleaved into three of four bit planes of a dynamic random access memory. When displaying the image, the controller will simultaneously read from the first and second images. If the value of the second image is non-zero, then the second image is displayed. Otherwise, the first image is displayed.

Abstract: A laser beam color image display apparatus includes a single laser beam source for emitting a laser beam from which a plurality of blue, green, and red laser beams are separated, or a plurality of laser beam sources for emitting respective blue, green, and red laser beams. The red laser beam is generated by adding a laser beam having a wavelength of 568.2 nm and a laser beam having a wavelength of 647.1 nm by way of active mixture. The laser beams are modulated in intensity with color signal components, and then deflected by a light scanner, composed of a polygon mirror and a galvanometer mirror to scan a display screen for thereby displaying a color image thereon. The laser beam having the wavelength of 568.2 nm and the laser beam having the wavelength of 647.1 nm are added at an output power ratio of 1:20, with the resultant red laser beam having a wavelength of 612 nm.

Abstract: A system for stereographic display in a computer system having a display medium has an image data file having data for right and left eye images encoded with visible signal data, so that when the right and left eye images are displayed on the display medium the corresponding visible signal is also displayed. A sensor senses the displayed visible signal and is coupled to glasses or goggles having right and left eye shutters. The right and left eye shutters open and close in response to the visible signal sensed.

Abstract: A method and apparatus for diminishing flicker of a liquid crystal display (LCD) by producing a variable temporal modulation of the fluorescent tubes providing rear illumination of the LCD matrix panel. Fluorescent tubes are placed in a sequence behind the panel, parallel to lines of pixels of the panel. A high frequency supply of each tube is modulated by a low frequency periodic pulse control signal, the chopping rate of which is modulated. The modulation in the chopping rate of each low frequency periodic pulse control signal is determined by corresponding control signal. The control signals, delivered by a generator, are T/M phase shifted between two consecutive control signals, T being the image refreshing period and M the number of tubes. The control signals are individually adjusted to cause a rear illumination substantially in phase opposition with a means optical transmission of a zone of pixels facing each tube.

Abstract: In an addressable matrix device, for example an active matrix liquid crystal display device comprising a panel (10) having a row and column array of addressable picture elements (12), in which the elements are addressed via sets of row and column address conductors (14,16) by row and column drive circuits (24,26) providing sequential outputs, at least one of the circuits (24,26) consists of a sequence generator (28,29) comprising an electro-optic switching arrangement having light sensitive means including light sensitive elements (42), e.g. photodiodes, integrated on the panel and controlling the outputs of individual output stages (38) and light emitting means (35) including a plurality of light emitting elements (36) cooperating with the light sensitive elements, the light emitting elements being selectively operable to produce a sequence of outputs from the output stages, for example in order to scan the row address conductors.

Abstract: A video circuit which enables three full color VDU's (6a, 6b, 6c) to be driven by only one color graphics generator (2). The Circuit has many uses including the generation of head down displays for flight simulators.

Abstract: A triode-type electrophoretic display includes a fluid-tight envelope for containing an electrophoretic fluid with suspended pigment particles and has a glass viewing window upon which has been deposited a plurality of parallel cathode members. An electrically continuous grid member with a plurality of pores therein is deposited upon a layer of insulation overlying the cathode members. The grid pores preferably extend through the grid and the insulation layer to allow the fluid to contact the cathode members. A glass backplate seals the rear of the envelope and serves as a substrate for a plurality of parallel anode members. The cathode and anode members form a matrix with a plurality of intersections and are selectively electrically chargeable to induce movement of the particles within the fluid to or away from the individual intersections, localized concentrations of particles at the intersections being visible through the viewing window.

Abstract: A system for manipulating video image signals, in which digitized composite video signals (i.e. D2 digitally encoded PAL or NTSC) are converted to component video signals (i.e. luminance and color difference signals) allowing selected pixels to be modified. In addition, the unconverted composite video signals are also stored and a key signal is generated which indicates which of the converted (i.e. component) pixels have been modified. An output signal is then produced by combining the manipulated signals and the unmanipulated signals in proportions determined by said key signal.

Abstract: An interactive video display system with tight coupling between user-input and the images displayed to provide a feeling of real control by the user. A library of frames of video data is stored in randomly accessible data locations, such as an optical video disc. The video data in each frame in the library is assigned a virtual position in a pre-defined data space, such that the visual image in each frame is related to visual images in other frames by virtual position in the data space. User input is provided through track ball or mouse generating displacement signals. The input signal is translated to an updated virtual position in the data space relative to a previous virtual position and the next frame having the updated virtual position is displayed next.

Abstract: An existing analog two-wire transmitter has a sensor module, an analog excitation circuit, and an analog detector circuit which provides an output representative of a sensed process variable, such as pressure, to a two-wire current loop. The analog detection circuit is removed and replaced with apparatus including a digital converter that digitally calculates the transmitter's output. The output is improved by calculating correction for linearity. The analog excitation circuit may also be replaced with a replacement excitation circuit. The replacement excitation circuit and the digital converter can be energized in series to control energization current. A charge pump can be coupled to the loop to balance the current in the series circuit. The digital converter can also provide electrical span and zero adjustments.

Abstract: An improved railroad signal system is described in which a train is allowed to approach a block even if a red light is activated for the block. A white numbered light is activated indicating the maximum permissible speed of the train. The system includes a home clearing relay and a station timing relay which are activated by two separate circuits thereby eliminating a wire loop.

Abstract: A prism is installed at a lower part of the windshield near the dashboard with a first surface of the prism directed toward a viewing point of a driver and a second surface held in contact with the inner side of the windshield. The first or second surface of the prism is made a reflecting surface. The third surface is formed with a dark paint layer. The apex of the prism where the first and second surfaces join is tilted toward the driver seat in such a manner that the second surface becomes a total reflection surface for light from the third surface with respect to the viewing point of a driver. The display image of an indicator installed in the dashboard below the prism is reflected either by the first or second reflecting surface of the prism toward the driver's viewing point. Light from the dark third surface of the prism is totally reflected by the second surface toward the driver to provide a dark background for the display, enhancing the display contrast.