Abstract: A liquid crystal display device for displaying video data having a detection circuit for detecting a luminance distribution based on video data which is inputted, the luminance distribution being indicative of generation frequency of gradations in each of divided region which includes a plurality of gradations. The display device includes a determination circuit for determining at least one of a plurality of divided regions of higher generation frequency of gradation than that of other divided regions based on the luminance distribution, a correction circuit for correcting the video data so as to make a luminance characteristic of the at least one of the plurality of divided regions of higher generation frequency of gradation more abrupt than a luminance characteristic of the other divided regions, and a liquid crystal display panel for displaying the corrected video data. A width of the divided region is changeable.

Abstract: A luminance characteristic of inputted video data is determined by input video image characteristic detection sections, and polygonal line point master data and polygonal line point correction data are calculated based on the luminance characteristic so as to provide a satisfactory display state using a microcomputer and are outputted to the polygonal line generation sections. The polygonal line point data determining the output gradation characteristic is calculated in polygonal point generation sections and outputted to inter-point gradation operation sections, and operation processing is conducted by using the polygonal point data and the inputted video data in the inter-point operation sections to determine the inter-point gradation and outputted to a display panel.

Abstract: In a print control apparatus, even when an error such as a paper jam or the like which needs the reprint occurs in a printer, in order to perform an error recovery to generate the accurate reprint result, for preparation of the error recovery, a command buffer preserving section to preserve commands and drawing attribute parameters of each page head (or a command file preserving section or a page buffer preserving section to preserve a drawing dot image) and a preservation command buffer use redrawing/reprint preparing section to perform the error recovery by using the preserved contents (or a preservation command file use redrawing/reprint preparing section or a preservation page buffer reprinting section) are provided in the print control apparatus. When the error which needs the reprint occurs, even for a command of the type such that the drawing attribute parameters are handed over between pages, the accurate reprint is executed by using the preserved contents.

Abstract: In a print control apparatus, even when an error such as a paper jam or the like which needs the reprint occurs in a printer, in order to perform an error recovery to generate the accurate reprint result, for preparation of the error recovery, a command buffer preserving section to preserve commands and drawing attribute parameters of each page head (or a command file preserving section or a page buffer preserving section to preserve a drawing dot image) and a preservation command buffer use a redrawing or reprint preparing section to perform the error recovery by using the preserved contents (or a preservation command file uses a redrawing or reprint preparing section or a preservation page buffer reprinting section) are provided in the print control apparatus. When the error which needs the reprint occurs, even for a command of the type such that the drawing attribute parameters are handed over between pages, the accurate reprint is executed by using the preserved contents.

Abstract: An information processing system which includes at least one terminal having input apparatus for inputting data to the system and transmission apparatus for outputting the data inputted from the input apparatus, a display for displaying data, a communication line for transmitting data outputted from the terminal, and a control unit having at least one receiver buffer for storing data transmitted from the terminal via the communication line. The control unit is operable to display the data, which is stored in the receiver buffer, on the display.

Abstract: Disclosed herein is a system integrally comprising a CAD system and an electronic filing system. When vector data such as figures and their names are converted to image (raster) data for storage, the system automatically extracts, from the vector data coming from the CAD system, those data that correspond to predetermined character attributes, maximum numeric attributes, primitives of each figure and the topology thereof. The data are set as key-words and are made to correspond to the image data for registration and storage into the electronic filing system. In searching for desired image data, the corresponding key-words are input for data retrieval and output.

Abstract: An image data processing system which includes an image memory and an image processor for performing coordinate transformation of source image data expressed by two dimensional coordinates.

Abstract: A method and apparatus for file operation comprise a file operation method which enters, prior to the file operation, processing methods for exceptional events which are expected to occur during the file operation, a file operation method which, at the occurrence of an exceptional event during a file operation, holds the file operation, saves information pertinent to the held file into a memory, and inquires the user of the processing method of the held file for the exceptional event, and a file operation method which displays a list of hierarchically organized files at multiple levels so that multiple files can be designated as objects of operations.

Abstract: A bus master and a plurality of bus slaves are connected through a data bus and a control bus, and data transfer of hand shake system is performed. In the control bus, at least data strobe signal from the bus master to the bus slave and data confirmation signal from the bus slave to the bus master are transmitted. The data strobe signal from the bus master is one inputted to a bus strobe control circuit. The data confirmation signal from the bus slave is also inputted to the bus strobe control circuit, and the control circuit supervises level of the data confirmation signal being asserted and confirms negation, and then asserts the data strobe signal to the bus slave. Thereafter, a next data transfer is started.

Abstract: A central processing unit, a main memory for storing graphic or character data, an external memory, an input device for inputting the graphic or character data, a shared memory for temporarily storing the graphic or character data read by the central processing unit, a display processing means for preparing a plurality of display data displayed on a display from the graphic or character data on the shared memory, and a display memory for storing the plurality of display data are connected to a bus. The display memory, the shared memory, and the external memory have first, second and third save areas for temporarily saving the overlapped display data when the plurality of display data are overlapped. The main memory is provided with a first control table for controlling display position, mutual priority for display, and a save area during overlap, regarding each of the plurality of display data stored in the display memory.

Abstract: A print control system for controlling a computer system comprising a processing unit, a memory unit, a display unit, an input unit and a printer. The memory unit has print request blocks each for storing information necessary for printing a document, and an area for storing a print queue for defining the print execute order of the print request blocks.