Abstract: The "chip set" of a graphics adapter interface card is reduced to a monolithic integrated circuit that includes a programmable analog clock circuit for producing a video memory clock and a video dot clock. A digital graphics adapter controller is responsive to the video memory clock and the video dot clock to produce a video information stream. A random-access memory is responsive to the video information stream to produce a video display information stream, and a digital-to-analog converter is responsive to the video display information stream to convert the video display information stream to analog signals for application to a video display device.

Abstract: An active matrix type image display apparatus which includes: a plurality of data signal lines; a plurality of scanning signal lines crossing the plurality of data signal lines; and a plurality of pixel portions disposed in a matrix in areas enclosed by the plurality of data signal lines and the plurality of scanning signal lines, wherein each of the plurality of pixel portions includes: a pixel capacitor for storing electric charge supplied from at least one of the plurality of data signal lines, to display an image; storage unit connected to the pixel capacitor; and switching unit which alternately selects one of an operation for electrically connecting the pixel capacitor to the storage unit and an operation for electrically disconnecting the pixel capacitor from the storage unit.

Abstract: A 3D human interface apparatus using a motion recognition based on a dynamic image processing in which the motion of an operator operated object as an imaging target can be recognized accurately and stably.

Abstract: A pre-connected pointing device assembly retrofitable onto the keyboard of an existing computer system includes an analog input unit and a digital input unit physically and electrically interconnected to a data processing unit by flexible bands. The units and flexible bands are adhesively secured to the keyboard. The analog input unit is placed between two of the keys of the keyboard and the digital input unit is placed at the edge of the keypad area, preferably below the space bar. The data processing unit can be configured to fit in a recess at the rear of the keyboard.

Abstract: A detachable folding keyboard device includes a base frame unit consisted of a left base frame and a right base frame, a keyboard unit consisted of a left keyboard and a right keyboard respectively supported on the left and right base frames, connecting devices connected between the left and right frames for permitting the left and right keyboards to be end matched, or to be set apart and spread out like a fan, or to be folded up.

Abstract: A pointing device according to the present invention includes a trackball embedded in the case of a computer display. The trackball is placed adjacent to the display and the select buttons for the trackball are located on the backside of the display case behind the trackball. The user guides the trackball with his thumb and pushes the select buttons on the backside of the case with his index and middle fingers, allowing the user to operate the pointing device with only one hand. Alternatively, the trackball is embedded in the corner of the keyboard of a desktop system, with the select buttons on the opposite side of the keyboard behind the trackball. With the keyboard standing on legs, the user's fingers can reach the two select buttons opposite the trackball to operating the pointing device.

Abstract: A display system (500) processes an input signal to generate an image. The input signal includes successive frames of data defining lines which include image values and have a line direction. A display (100) for displaying the image has second electrodes (104) which are in a direction corresponding to the line direction. A video memory (640) which stores a frame of data includes a single line buffer (602) and a single frame buffer (608). A controller (622) controls storage of the frame of data into the video memory (640) and generates a predetermined image independent function during a time slot. A calculation engine (632) computes an image dependent output signal during the time slot which has values. Each of the values is determined from the predetermined image independent function and image values from one of the lines stored in the video memory (640).

Abstract: A coordinate input apparatus in which by indicating a desired position on a coordinate input surface by an input pen, coordinate value data of the indicated position is detected and output, includes: an output device to output the coordinate value data; a detector for detecting the down state of the input pen; a memory for storing the coordinate value data detected after the elapse of a predetermined time from the detection of the pen-down state by detector; and a controller for allowing the coordinate value data stored in the memory to be output by the output device such as a liquid crystal display. With the apparatus, the fluctuations of the coordinate value data just after the pen-down operation and just before the pen-up operation can be eliminated and the stable coordinate value data can be always output. An erroneous detection due to the fluctuation of the coordinate value data upon coordinate input can be prevented.

Abstract: A portable computer includes a flat panel display unit, a first graphics subsystem used for displaying data on the flat panel display unit, a connector for connecting an optional second graphics subsystem to the portable computer, and a switch circuit for switching the operation of the first graphics subsystem to that of the second graphics subsystem or vice versa. When the second graphics subsystem is connected to the portable computer, the switch circuit switches the operation of the first graphics subsystem to that of the second graphics subsystem, whereby data from the second graphics subsystem are displayed on the flat panel display unit.

Abstract: A display panel integrated with EL can be obtained by printing EL at the back of a light permeable substrate, and covering the front surface of the substrate and the rearface of EL with a moisture proof film for insulating and protecting the EL from the surrounding atmosphere. Alternatively, the film may cover the substrate and EL entirely. An indication mark is printed at the surface of the moisture proof film or the light permeable substrate. The light permeable front electrode, the light emission layer and the back electrode are successively printed to the rearface of the light permeable substrate. If the indication mark is printed on the surface of the substrate, the attenuation of decay of the light emission from the emission layer can be suppressed and the brightness of the display mark improved by not forming the insulation layer at the back of the substrate.

Abstract: A graphic drawing system includes a drawing surface and a stylus capable of being moved over the surface in order to simulate plotted lines. The coordinates of the stylus in the plane of the surface are determined with respect to a reference, and a digital image can be created or updated using these coordinates. This digital image can be displayed on a screen. An angle of the stylus with respect to the drawing surface can determine a line width in the image.

Abstract: A new and improved display control system which includes a logic arrangement for causing a displayed image indicative of a portion of a corresponding larger image to be displayed upon an input command from a user. A line control circuit responsive to user input commands enables the displayed image to be shifted visually from a current visualization position, up or down, row by row for line pan visualization of corresponding portions of the larger image. A pixel control circuit also responsive to user input command enables the displayed image to be shifted visually from a current visualization position right or left, column by column, for column pan visualization of corresponding portions of the larger image. The line control circuit and the pixel control circuit operate independently of one another or in combination with one another to achieve any desired panning effect.

Abstract: A liquid crystal display device providing a multi tone control function is disclosed, permitting a multi-colored display to be provided by using an analogue display data input, while regulating stepwise the brightness by varying the level of the applied voltage. The liquid crystal display device is composed of serial/parallel converter having a high sampling speed, into which liquid crystal display data are inputted, with function of converting serial image data into parallel image data, and an X axis direction driver having a low sampling speed, into which the liquid crystal display data for one pixel are inputted, with a function of outputting the liquid crystal display data of one line in the horizontal direction, synchronized with a display line signal for a Y axis direction driver. The S/P converter and the X axis direction driver are disposed separately.

Abstract: A system and method for detecting when an operator selects one of multiple objects from a projected image. Image data, object data and relative position data drive a liquid crystal unit to form on a screen a composite display of both image and objects. When the operator presses a switch, a signal including the state of brightness from an optical sensor is entered into a brightness determinator of a personal computer. The brightness determinator initiates the determination of the brightness and then the object controller varies the brightness of each object. Along with the change in the brightness of objects, the brightness determinator decides the object indicated based on the brightness detected by the optical sensor to cause an object correspondence processor to effect the processing (conversion of a display) corresponding to the object selected by the operator.

Abstract: A method and system for producing a finely textured display image of a gradation of high color resolution color shading. The high color resolution system is adapted to be coupled to a relatively inexpensive high speed active matrix display panel employing single-bit LCD drivers and a plurality of sub-pixel elements. The system includes a sub-pixel activation circuit for generating single-bit digital signals for driving individual ones of the sub-pixel elements. A duty cycle circuit arrangement controls the sub-pixel activation circuit to cause desired ones of the sub-pixel elements to be activated selectively an average number of times over a large number of consecutive frame time intervals to generate sub-pixel images having desired perceived color shading levels.

Abstract: A method and circuit of driving a flat display panel formed of a plurality of cells each having a memory function, where the cells are formed at cross points of a plurality of X-electrodes and a plurality of Y-electrode orthogonal to the X-electrodes, a period of a frame for displaying a single picture is divided into a plurality of sequential subframes. Each of the subframes comprises: an addressing period during which cells to be lit later in a display period are selected from all the cells by being written by having a wall charge therein; and the display period subsequent to the address period for lighting the selected cells by applying sustain pulses to all the cells. A number of the sustain pulses included in each display period is predetermined differently for each subframe according to a weight given to each subframe.

Abstract: A display apparatus of a simple matrix type displays an intermediate tone on a liquid panel by a data thinning-out system. As a modulated alternating inverted signal for determining a polarity of a driving voltage is applied to each pixel of the liquid panel, employed is a signal whose phase is inverted by 180.degree. every tone representing cycle which is a predetermined period of a plurality of frames, and it is structured such that a polarity of the driving voltage to be applied to each pixel is changed according to polarity of the modulated alternating inverted signal. Therefore, a positive polarity portion and a negative polarity portion of an effective voltage to be applied to a pixel in an arbitrary tone representing cycle are completely canceled by a negative polarity portion and a positive polarity portion of the driving voltage to be applied to the pixel in a tone representing cycle adjacent to said arbitrary tone representing cycle respectively.

Abstract: A thin-film EL display device of red luminescent color having high luminous intensity and high reliability is disclosed. The thin-film EL display device has a first transparent electrode, a first transparent insulating layer, a light-emitting layer of zinc sulfide (ZnS) with the addition of manganese (Mn), a red-light transmitting filter of amorphous silicon (a-Si), a second transparent insulating layer, and a second transparent electrode (second electrode), which are successively deposited one on top of another on a glass substrate. The EL display device produces red light from orange light emission from the light-emitting layer. High temperature resistance of the filter permits the insertion of the filter to a desired position during the fabrication process for the thin-film EL display device.

Abstract: A frame buffer including an array of memory cells for storing data indicating pixels to be displayed on the output display, row addressing decoding apparatus and column address decoding apparatus for selecting memory cells positioned in the array, apparatus for transferring a row address to the row addressing decoding apparatus upon the assertion of a row address strobe signal, apparatus for transferring a column address to the column address decoding apparatus for decoding upon the assertion of a first column address strobe signal, apparatus for latching a column address and any data necessary to complete the access during the first column address strobe signal, apparatus for accessing the particular column the address of which has been latched during the latching of a next subsequent address of a column to be accessed along with any data necessary to complete the next access during the next subsequent column address strobe signal following the first column address strobe signal.

Abstract: A display unit in which a black level is set to a predetermined level in a first display screen having a first aspect ratio and a black level is set to a predetermined level in a second display screen having a second aspect ratio is provided. A darkest signal of a video signal is detected from an image area corresponding to the second display screen. The darkest signal is lowered to a predetermined level in an image area corresponding to the first display screen. In accordance with the principles of the present invention, the situation where a video signal of the second display screen that is to be lowered will not be lowered can be prevented.