Abstract: A digital color image display system adapted to a frame buffer for displaying color images. The system includes apparatus for color quantization. The color distribution of a color image is stored in a memory device (HISTTABLE). The memory device has address format of r0g0b0r1g1b1. . . rnbnzn, where ri is ith bit in red color bits, gi is ith bit in green color bits, and bi is ith bit in blue color bits. Thus, each pixel can be mapped into one of the addresses of the memory device according to its three basic color bits (red, green and blue); and the three basic color bits form a color universe cell in a 3-dimensional space. To select 256 colors from a color image, the color universe cell is divided into 256 color cells according to the color distribution.
Abstract: An image processor produces a cross-faded image from first and second image data and first and second control data. The cross-faded image corresponds to a product of the first image data and the first control data and a product of the second image data and the second control data. The image processor includes a first address generator which generates a first l-bit address signal made up of the upper (n-k.sub.1) bits of the first n-bit image data and the upper (m-k.sub.2) bits of the first m-bit control data. Similarly, a second address generator is provided which generates a second l-bit address signal made up of the upper (n-k.sub.1) bits of the second n-bit image data and the upper (m-k.sub.2) bits of the second m-bit control data. The number of bits l of each address signal is less than a sum of the bits n and m of each of the image data and control data. The first and second address signals are used to access a ROM which is used to generate corresponding first and second product data.
June 7, 1991
Date of Patent:
February 15, 1994
Matsushita Electric Industrial Co., Ltd.
Yoshinori Amano, Misao Kato, Yoshio Hirauchi, Mari Kimura
Abstract: A map display apparatus for displaying a wide area map and an enlarged map is disclosed. When a display mode is shifted from the mode of displaying the enlarged map to the mode of displaying the wide area map, a cursor frame is displayed on a position on a parent screen corresponding to the divided area which has been displayed in an enlarged manner just before the shift of the display mode, so that the position on the parent screen of the area which has been displayed in the enlarged manner so far can be easily discriminated.
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: An apparatus and method for displaying non-obscured pixels in a multiple-media motion video environment (dynamic image management) possessing overlaid windows. In an encoding process, only boundary values and identification values corresponding to each window on a screen are saved in memory of a hardware device. In a decoding process, the hardware device utilizes these initial boundary values saved in memory in such a way that when incoming video data enters the hardware device, the hardware device need only compare the incoming video data's identification with the identification saved in memory. The hardware device includes: compare logic devices, counters, minimal memory devices, a control logic block, and a driver.
April 22, 1992
Date of Patent:
January 4, 1994
International Business Machines Corporation
Abstract: A radiographic imaging system including image storage for storing a plurality of radiographic images and a video display for displaying one or more radiographic images in a reduced format. The radiographic images are reduced for display by means of a decimation technique which achieves processing speed and good image resolution.
Abstract: In an alpha-numerical display the segments are split up into (interconnected) sub-segments in such a way that characters can always be displayed in a manner analogous to that for a conventional matrix display. This provides the advantages of a great freedom of choice of characters with a drive mode (1:n multiplexing, n.ltoreq.4) yielding a large viewing angle and a high contrast.
Abstract: A pictorial element display assembly adapted for mounting in a matrix of similar assemblies to present a character by transmitted and/or reflected light. The assembly has a rectangular opaque panel formed with a pocket defining a window in which is set a colored plate for displaying the illuminated pixel. A pair of light spot projecting caps set in keyhole shaped slots in the colored plate have parallel, coplanar axes aligned on a central axis midway between lateral edges of the panel. A D-shaped gate is rotatable through 180.degree. by an electromagnetic device, to open and closed positions on the window and on the panel for selectively uncovering and covering the covered plate. The caps engage ends of light transmitting fiber cords which carry light from a light source to project the light as light spots in intense beams out of central holes in ends of the caps. The axis of rotation of the gate is parallel to and spaced laterally from the central axis of the colored plate, away from the colored plate.
Abstract: An electronic device with multiple functions has a base case provided with an input key unit on an upper surface and a plurality of openable cases which are openably mounted on the base case so as to be freely open and closed. The base case has an arced guide thereon. The openable cases are arranged so as to be stacked on the base case when closed. One of the openable cases has a moving member which is movably engaged with the arced guide for connecting the openable case to the base case. The openable cases each are provided with an electro-optical display unit on a rear surface. The openable cases except the outermost openable case each are provided with an input key unit on an upper surface.
Abstract: A multi-mode home terminal system utilizes a single embedded processor and a single RAM for performing modem operations, graphics/video processing and general purpose control tasks. The multi-mode home terminal system supports a wide range of video/graphics standards, modems and voice algorithms. Home terminal input data to be displayed on an associated monitor can be decoded to any display list format or directly to the system's frame buffer. The display lists, frame buffer, font area, and embedded processor memory are located in the same single random access memory, thus allowing the use of a single RAM for DSP data, display lists, video buffers, voice compression/decompression algorithms and embedded controller tasks. The system is flexible for programming the desired video standard, modem type and display list format. Since both the video function and the embedded processor are supported by the same RAM, a RAM arbiter resolves bus contention.
Abstract: A display device having 8-bit architecture includes a decoder for decoding 8-bit bytes of data representative of pixel intensities of 12 bits sufficiently fast to enable the display in flicker-free manner of an image having a frame of 1024.times.1024 pixels. The decoder is hardware based and consists of electronic circuitry without the use of programmed devices incorporating software logic. The decoder may be utilized in new display devices or used to retrofit existing 8-bit architecture display devices. An encoder is also disclosed for encoding 12-bit pixel data into 8-bit data for storage or transmission to the display device.
Abstract: Disclosed is a method for the control of display screens that can be applied to internal memory type screens, notably plasma display panels for which it increases the dynamic range of the adjusting of the luminosity. This method consists in controlling the cells (C1 to C16) of the screen by means of addressing commands, each one of which comprises a selective command and a semi-selective command. According to one characteristic, for the addressing of one and the same line (L1 to L4) of cells (C1 to C16), the method consists in separating the selective command (CI) from the semi-selective command (CE) by an adjustable interval of time (PL1 to PL4).
April 26, 1991
Date of Patent:
August 17, 1993
Thomson Tubes Electroniques
Michel Gay, Jacques Deschamps, Serge Salavin, Michel Specty
Abstract: A method for driving an active matrix electro-optical display having pixel electrodes arranged in a matrix with a plurality of first electrodes arranged in rows, through an active ferroelectric layer disposed between the first electrode and the pixel electrode is provided. A second electrode is disposed in a row direction on an opposed substrate with an electro-optical material in the space between the substrates. The method includes the steps of applying a selective voltage V.sub.0 to the first electrode and a data voltage V.sub.1 to the line electrode so that the range of the absolute value .vertline.V.sub.1 .vertline. of the data voltage V.sub.1 is represented by .vertline.V.sub.1 .vertline.<E.sub.c .multidot.d.sub.F (C.sub.LC +C.sub.F)/C.sub.LC in which E.sub.c is defined as the electric field of the active layer, d.sub.F is defined as the thickness of the active layer, C.sub.F is defined as the capacitance of the picture element of the active layer and C.sub.
Abstract: A control circuit comprises a combination of two or more nonlinear resistor elements having a common electrical junction and a nonlinear current/voltage characteristic, the impedance at the common electrical junction being controlled in accordance with switching voltages applied to the nonlinear resistor elements. These nonlinear resistor elements may be connected to one terminal of a load element, such as a liquid crystal element or a printing element. An array of such load elements, such as printing elements or liquid crystal elements of the microencapsulated type, combined with these nonlinear resistor elements form, respectively, a printing engine or display device. The nonlinear resistor elements are composed of semiconducting or conducting powder particles bonded together with an insulating or semiconducting binder.
Abstract: In a liquid crystal display device, MIM type nonlinear resistive swiching elements are connected to pixel electroes, respectively, counter electrodes are arranged to oppose the pixel electrodes and, a liquid crystal layer having a threshould voltage Vth (V) and a saturation voltage Vsat (V) is arranged between the pixel electrodes and the counter electrodes. A voltage having a voltage waveform constituted by a select period in which the signal voltage is applied and a nonselect period in which the signal voltage is held is generated between said electrodes, and an absolute value Vb (V) of the voltage applied between said electrodes during the nonselect period satisfies a relation of:V'/2-0.4.ltoreq.Vb.ltoreq.V'/2+0.5(where V'=Vth+Vsat).
Abstract: A liquid-crystal display apparatus having scanning electrodes and signal electrodes, both being disposed in a matrix arrangement, which divides a selection period for a scanning electrode by m and performs a display based on same data for m times, and which makes different a wave level of a scanning-electrode driving signal during each divided selection period. A liquid-crystal panel driving circuit for driving a liquid crystal panel having scanning-electrodes and signal electrodes, both being disposed in a matrix arrangement, which divides a selection period for a scanning electrode by m and performs a display based on same data for m times, and which makes different a wave level of a signal-electrode driving signal during each divided selection period.
Abstract: A personal portable computer having a fluorescent backlit LCD is provided with circuitry for mitigating noticeable flicker of the backlight. The signal driving the backlight is synchronized with the display refresh signal. More particularly, a horizontal sync signal from an LCD driver is applied to a counter which divides the horizontal sync signal by a predetermined amount. The counter is reset after each frame of the display is written by a vertical sync signal. The output of the counter is applied to a pluse width modulator, such as a monostable multivibrator, which provides a signal to the backlight, synchronized with the display refresh signal. The circuitry also allows for the duty cycle of the backlight signal to be adjusted to control the brightness of the display and consequently the power drain on the battery.
Abstract: An information processing system capable of editing images is provided. The system can easily cut out desired image information even when the system must designate an arbitrary shape region which is used to cut out and edit image information.
Abstract: An infrared touch screen device that is externally adaptable to a video monitor for serving as an input device to a computer connected to the monitor. A bezel is adapted to be releasably secured over a viewing end of a video monitor. A plurality of infrared emitters are disposed along the bezel to form a grid of vertical and horizontal infrared beams in the interior space of the bezel when the emitters are activated. A plurality of infrared sensors are disposed along the bezel. Each sensor is optically aligned with an oppositely disposed one of the emitters. An activating circuit is mounted on the bezel for sequentially activating, in a predetermined sequence, respective ones of the emitters. A scanning circuit is mounted on the bezel for sequentially scanning the sensors in a sequence corresponding to the predetermined sequence, the sensors each producing output signals corresponding to the presence and absence, respectively of an infrared beam emitted by an oppositely disposed infrared emitter.
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.