Seiko Epson Corporation

Tetsuaki Otsuki

Kota Muto

A method of driving an electrophoretic display device includes changing the gradation level of image data on the basis of correction data corresponding to the gradation level, converting image data with the changed gradation level to a dithering pattern, in which the first color and the second color are combined, corresponding to the changed gradation level for each predetermined region of image data, and driving the electrophoretic particles of the first color and the electrophoretic particles of the second color on the basis of image data converted to the dithering pattern for the plurality of pixels in the display section.

Method of driving electrophoretic display device capable of displaying image data approximated to original image data, electrophoretic display device, and electronic apparatus

A file search system includes : a file analyze device including: a character string identifying unit; a first calculating unit; a second calculating unit; an analyzing unit; an output unit; and a file search device including a first obtaining unit; a second obtaining unit; an index storage unit; a file identifying unit; a ranking unit; and a notifying unit.

File search system, file search device and file search method

A device composed of structures and access methods for providing search functionalities is proposed. The structure includes a presence/absence information unit that stores bit-level items grouped in blocks. Other structures included are, a character string list that is used to store keys composed of character strings and a file specification unit that uniquely identify files from multiple files. Each element of the 2 former structures has a uniquely assigned identification number. The presence/absence information items associated with each file are ordered according to the identification numbers stated previously. The elements of the former 2 structures are many-to-many associated through the presence/absence information items, using a combination of identification numbers. An obtaining unit for search keys is provided, together with the output unit that produces file identifiers specified by the file specification unit.

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Suginami-ku, Japan

Tetsuaki Otsuki