Abstract: A column driver for a matrix addressed display such as a liquid crystal display (LCD) is disclosed. The column driver accepts 10-bit inputs, provides 1024 distinct output levels, and is compatible with digital gamma correction by way of, for example, an EPROM lookup table. A complete column driver includes a group of chips which are serially interconnected and receive all the external signals applied in parallel. Only one chip is made active at any instant of time, in order to save power. In each IC, selective polarity inversion of the 10-bit data is carried out before feeding it to a switched capacitor digital to analog converter (CAPDAC) which operates in either a high or low voltage range. All CAPDACs are loaded simultaneously and present a precise output for approximately 95% of each linetime. Each CAPDAC output is connected to a buffer opamp via two CMOS switches which cause the CAPDAC to simultaneously yet transparently change range and allow the opamp buffer to continue driving.

Abstract: The present invention relates to a method of converting two-dimensional images into three-dimensional images. In the present invention, a right eye image signal and a left eye image signal between which there is relatively a time difference or a luminance difference are produced from a two-dimensional image signal, thereby to convert two-dimensional images into three-dimensional images. According to the present invention, therefore, it is possible to convert the existing two-dimensional image software into pseudo three-dimensional image software to obtain three-dimensional images.

Abstract: A method for reducing colorflashing by performing residual color allocation and default colormap sharing in a computer system that employs a default colormap to display color. The residual color allocation technique copies color values from a private colormap into corresponding non-allocated (free) cells within the computer system default colormap. While copying into the free cells in the default colormap the free cells are temporarily set to have an allocated status. After copying, the copied cells are reset to a free status. In this way, other clients may allocate the default map's free cells to perform residual colormap allocation. Since the default colormap's copied cells are the same as corresponding cells in the private map they do not flash when switching color focus between the default colormap and the private colormap. The default colormap sharing technique is employed in the case in which a private colormap does not require a specific set of colors, and can adapt to a given set of colors.

Abstract: Video image information representing an immersive image up to a complete spherical field of view is utilized by a special image processor to extract a region of interest as a moveable window. The immersive image is divided into standardized pentagonal segments according to the geometry of the dodecahedron, and these segments are carried as a plurality of video channels. The image processor extracts and assembles the moveable region of interest from among the various segments of the image as they are recorded in a segmented memory, according to pointing device information from the user, such as a joystick or the tracker of a head-mounted-display. The video image information used can come from sources including a photographic camera system recording scenes from the real world, and can be either live or prerecorded. Existing methods for transmission of video channels can be used to broadcast such immersive images.

Abstract: A single chip display processor comprised of a dynamic random access memory (DRAM) for storing at least one of graphics and video pixel data, a pixel data unit (PDU) for processing the pixel data, integrated in the same integrated circuit (IC) chip as the DRAM, the IC chip further comprising a massively parallel bus for transferring blocks of pixel data at the same time from the DRAM to the PDU, whereby the PDU can process the blocks of pixel data for subsequent display of processed pixel data.

Abstract: The present invention is related to an apparatus for digital video format conversion for a decompressed digital video data outputted from a decompressor, which includes a video interpolation device processing the decompressed digital video data by way of on-the-fly interpolating and filtering procedures to obtain an interpolated and filtered digital video data, and a color space converter electrically connected to the video interpolation device for converting the interpolated and filtered digital video data processed by the on-the-fly interpolating and filtering procedures from a first color space into a second one to complete the digital video format conversion. The present apparatus processes the decompressed digital video data by way of on-the-fly interpolating and filtering procedures and therefore the resolution of an original frame can be shown on a computer monitor to obtain a good frame quality.

Abstract: An interactive display system is described using a standard TV monitor placed on a touch position sensor. A control operates with the output touch signals from the touch position sensor to produce frame number signals that are representative of the frames stored on a laser disk. The laser disk player generates the desired video frame signals which are applied to the TV monitor to display the frames. The touch signals from the touch position sensor provide an indication of where a person has made contact with the screen of the TV monitor to thus enable the person to interact with the information in the frames stored on the laser disk in a simple and rapid manner.

Abstract: The plasma display panel driver circuit disclosed includes a panel inter-electrode capacitor, a charging/discharging circuit, and a voltage clamp circuit. The panel inter-electrode capacitor is provided between scanning and sustain electrodes of a panel. The charging/discharging circuit is connected in parallel with the panel inter-electrode capacitor and formed by a combination of a coil, FET switches and reverse current blocking diodes. The voltage clamp circuit includes four switches connected to terminals of the panel inter-electrode capacitor. The panel inter-electrode capacitor, together with a series circuit of the coil and the FET switches, forms a parallel resonance circuit. The panel inter-electrode capacitor 40 is repeatedly charged and discharged through the control of the switches with switch drive inputs. In the driving of a plasma display panel, ineffective power is reduced when charging and discharging the panel inter-electrode capacitor.

Abstract: The integration of Video and Graphics Rasterization along with associated functional blocks provides a balanced MultiMedia/Graphics solution to the technology/bandwidth problem of today's higher density memories. Video rasterization, graphic rasterization, and window identifier functionality are contained on the same chip, fast Random Access Memory for each is provided for each, and the wide bus and high speed accesses to within the chip are shared and contained. The problem is therefore solved in a manner beneficial to both rasterization and video components of Multi-Media and Graphics. Window identification and control functions are added into the memory module, thus permitting both video and graphics rasterization functionality to be closely coupled to an independent high speed SRAM within the Memory Module, and thus applying the full internal wide bus bandwidth of the Frame Buffer memory to both real time video Multi-Media and graphics rasterization functions.

Abstract: A display (10) has pixels organized into groups (11, 41) that operate in parallel. Each group (11, 41) distributes the frame time (25) of the display over the number of active pixels within the group thereby maximizing the amount of time each pixel to be illuminated can be active.

Abstract: Individual pixels in a display formed of a plurality of pixels are controlled using a plurality of mixers, with each mixer having first and second inputs and an output. The mixers are connected to correspond to a matrix of rows and columns. The first inputs of all mixers corresponding to a particular, individual row in the matrix are connected to a common row lead, there being an equal number of row leads to the number of rows in the matrix. The second inputs of all mixers corresponding to a particular, individual column in the matrix are connected to a common column lead, there being an equal number of column leads to the number of columns in the matrix. A distinctive alternating signal is fed to each of the row leads, wherein the signal fed to one row lead differs from any signal fed to any other row lead by a predetermined, set frequency.

Abstract: A data driver circuit for an LCD including a switching circuit for transferring a data signal from a data channel to a first data line and a second data line. Also included is a sample circuit which alternately samples the data signal from the first data line and the second data line to produce and store respectively a first and second sampling data signal during a respective first and second time period. A data driver retrieves from the sample circuit the first sample data signal during the second time period and the second sampled data signal during the first time period. Then, the data driver transfers a driving pulse corresponding to one of the first sampled data signal and the second sampled data signal to the display.

Abstract: A gray voltage generator for liquid crystal display can control a viewing angle of the liquid crystal via a shift of a gray reference voltage by adjusting a size of the gray reference voltage level, can compensate kick back voltage and threshold voltage of the liquid crystal by fine adjustment of the gray reference voltage level, and can prevent an abnormal screen displayed in the liquid crystal display during an internal setup time when a video signal is not produced after power is applied to electrical equipment including its liquid crystal display.

Abstract: An apparatus for interfacing the movement of a shaft with a computer includes a support, a gimbal mechanism having two degrees of freedom, and three electromechanical transducers. When a shaft is engaged with the gimbal mechanism, it can move with three degrees of freedom in a spherical coordinate space, where each degree of freedom is sensed by one of the three transducers. A fourth transducer can be used to sense rotation of the shaft around an axis.

Abstract: A liquid crystal display device includes: a multiple number of scan electrodes disposed parallel to each other; a plurality of signal electrodes disposed parallel to each other and perpendicular to the scan electrodes; and a ferroelectric liquid crystal disposed at crossing points of the scan electrodes and the signal electrodes to form pixels. In the device each of the pixels is provided with a plurality of scan electrodes so as to form a multiple number of sub-pixels constituting the pixel and a pixel dividing device is constructed such that, with a multiple number of scan electrodes A, B and C (three or more) constituting a single pixel, a line width ratio A:B:C of the scan electrodes is 1: N.sup.P -1:1 (N and P are integers of 2 or more) and these scan electrodes are displayed always in the order of A.fwdarw.B.fwdarw.C.

Abstract: The drive voltage (V.sub.DATA -V.sub.REF) across an active matrix liquid crystal display module (24) is reversed on alternate frames or alternate lines by using a fixed voltage level (V.sub.REF) at one side of the LCD module and shifting the level of a base component (V.sub.BASE) on the other side of the module between higher and lower voltage levels that are respectively higher than the fixed reference level and lower than the fixed reference level. All voltages have the same polarity so that polarity shifting of any applied voltage is not required. An intensity level component from a digital to analog converter (40a), controlled by a digital input code (41), is combined with the base component in the same sense in alternate frames, but with the digital input code inverted in alternate frames.

Abstract: The objectives of this invention are to improve the method of supplying power from an operating power source and thus implement a liquid crystal drive device with an internal display data storage device that consumes less power and is also larger. A signal electrode drive circuit (X driver) is made up of a low-voltage-amplitude operating portion that operates on the supply of a first power voltage group, and a high-voltage-amplitude operating portion that operates on the supply of a second power voltage group. A frame memory that stores display data is provided in the high-voltage-amplitude operating portion, with the configuration being such that the operating power source for the frame memory is supplied from the second power voltage group.

Abstract: A data driver circuit and system driving scheme that can be integrated directly onto an LCD display substrate to reduce the cost of the peripheral integrated circuits and the hybrid assembly needed by unscanned active matrix liquid crystal displays to connect them to the array. A demultiplexer circuit is deposited on the display for demultiplexing a group of Y columns of multiplexed video data input signals to X groups of Y pixel capacitors that are also deposited on the substrate in Z rows. In addition, a data driver circuit provides voltage signals to precharge the pixel capacitors to a first voltage level in a first time period such that video data input signals coupled thereto in a multiplexed fashion during a second time period causes the pixel capacitors to store to a second predetermined voltage level to provide a video display as the rows of pixels are sequentially scanned.