Abstract: An electrochromic system utilizes the benefit both from the continuous variability in transmission and memory in EC devices to provide a partial level of light transmission that is variable while minimizing energy usage. An electrochromic element that is responsive to a momentary application of a signal by coloring to a corresponding partial transmission level and maintaining at that level for a given period of time after removal of the drive signal, is provided with a drive signal. The drive signal has a value corresponding to a selected transmission level and is applied for a first predetermined period of time in order to color the electrochromic element to the selected transmission level and repetitively thereafter for the same or shorter periods of time. The subsequent periods are separated from each other and from the first period by holding periods of time during which the drive signal is not applied.

Abstract: A color encoder for reducing visible artifacts even when the values of the respective color signals are truncated during encoding. Since the human eye is most sensitive to luminance variations in the displayed image, luminance errors (and hence visible artifacts) are minimized by adding red and green color error signals to the blue color intensity signal prior to encoding so that luminance detail may be maintained. The blue channel is chosen for this purpose since the human eye is least sensitive to changes in blue and yellow. The color maps for the resulting encoded signals may be scaled such that the red and green values are raised and/or the blue values lowered so as to maintain the same relative intensity of luminance in the displayed image. Errors in the displayed luminance signal may thus be made up to four times smaller without increasing the amount of memory required and without adding expensive processing circuitry.

Abstract: In a video signal display apparatus having a liquid crystal display unit with liquid crystal cells arranged in a matrix for displaying a display signal developed from an input video signal, the supplying of a scanning signal to the liquid crystal display unit is inhibited during a period in which an unnecessary portion of the video signal is provided, for example, as when the input video signal is derived from a VTR in a variable speed reproducing mode, and, during such inhibition of the supplying of the scanning signal to the liquid crystal display unit, the latter is made to continuously display the display signal previously supplied to the liquid crystal cells.

Abstract: A beam-index-type color display apparatus includes an A/O modulator for emitting a first-order beam for use as an image projecting light beam and a zero-order beam for use as an index beam. The color display apparatus is light-weight and may have a large screen. An index signal can reliably be produced even if the screen is treated for a higher screen gain.

Abstract: A plasma display includes a mode discrimination/clock generator. A CRT display controller generates vertical and horizontal sync signals having polarities. The mode discrimination/clock generator discriminates the polarities of the vertical and horizontal sync signals to determine a display resolution. Anode and cathode timing generators generate display timing signals in accordance with the display resolution.

Abstract: A remote registration and calibration system for a hybrid video display. The registration and calibration functions are performed by a computer. Display mounted switches are advantageously employed. The computer system samples the state of an array of switches and then performs calibration functions based on the state of the switches.

Abstract: A method of forming a fluorescent screen for a plasma display panel provided with a front plate and a rear plate disposed parallel to each other and a cell barrier mounted on the front or rear plate and constituting a plurality of cells as display elements is characterized in that the cell barrier is located on a surface of the front or rear plate facing the other plate, a slurry solution containing a phosphor is filled in a portion defined by a cell wall of the cell barrier on the front or rear plate, only the wall surface of the cell barrier is exposed, and so a photosensitive layer containing a phosphor is formed at a portion inside the cell barrier. The fluorescent screen forming method is further characterized in another aspect in that a slurry solution containing a phosphor fills inside the cell of the cell barrier disposed on the plate, the plate is inclined immediately thereafter with an inclination of about 90.degree.

Abstract: A display apparatus is described having the capability to pan a viewport image across a world-plane image. The viewport image has defined boundaries and exhibits a cursor whose position is movable by a user operated mouse or keyboard controls. The invention comprises a method for providing a variable-rate pan action of the viewport image which includes panning the viewport image at a preset rate in the direction of a first viewport boundary, if the cursor has been moved to the first boundary. The viewport image is panned at a proportionally faster rate in the direction of the first viewport boundary, as the cursor is moved further beyond the first viewport boundary thus enabling a variable speed pan under user control.

Abstract: There is disclosed a graphics display controller for controlling a display memory, which includes a display address register temporarily storing an address which is changed in a predetermined cycle during a display period, a first circuit for producing a first signal each time less significant bits of the address becomes the same value as each other, a second circuit for producing a second signal each time a horizontal scan line to be displayed changes, and a third circuit for producing a display memory access request signal in response to the first or second signal. The controller further includes a flag register and a mask circuit, this mask circuit masking the second signal to prevent it from being transferred to the third circuit when the flag register stores first information, and allowing the second signal to be transferred to the third circuit when the flag register stores the second information.

Abstract: A planar matrix of display picture elements is operated by supplying power to the picture elements by a high current planar drive electrode connected to the picture elements, and a planar counter electrode slightly separated from the picture elements' display dots, and by addressing the picture elements with low current leads parallel to the plane of the matrix. The planes of the electrodes are parallel to the plane of the matrix. The elimination of high current power leads improves response time and resolution. The separation of the counter electrode from the display dots eliminates the need to refresh the picture elements. An isolation transistor in series with the drive transistor allows simultaneous color change of the entire matrix by simultaneous turning on and off of all isolation transistors.

Abstract: A stroke-mode CRT display having a Z channel (video) compensation circuit is disclosed. The function of the compensation circuit to correct for the lag of the X and Y channels in relation to the Z channel. The compensation circuit is designed so that transfer function characteristic is identical to that of the respective deflection amplifier and coil circuitry for the X and Y channels. With the compensation circuitry, the X, Y and Z channel signals are in proper relation to one another, and high quality symbology is achieved.

Abstract: A pointing apparatus includes a direction determination circuit for determining a moving direction of a cursor in accordance with cursor current position information and cursor moving information input from a mouth, and a cursor jump circuit for recognizing the presence/absence of an icon to be designated by the cursor near a position along the moving direction determined by the direction determination circuit, and for jumping the cursor to the position of the icon.