Patent ID: 7477267

Claim:
A display apparatus comprising: a storing section that stores a plurality of sub-image data; a display section that displays an image, and that comprises a plurality of pixel lines juxtaposed in a direction perpendicular to a predetermined direction, each of said pixel lines comprising a plurality of pixels arranged in said predetermined direction; an on-screen image generating section which is a portion of the display section and includes a plurality of blocks; a determining section that determines whether or not a part of said sub-image data is displayed in each block of the plurality of blocks into which said pixel line is divided, when said display section displays said sub-image data; a plurality of block storing sections, each of which stores said part of said sub-image data displayed on said block; a reading out section that reads out said part of said sub-image data displayed on said block from a storing section, and then causes any one of a plurality of said block storing sections to store said read out part of said sub-image data, when said determining section determines that said part of said sub-image data is displayed; a generating section that generates compound sub-image part data obtained by compounding said parts of said respective sub-image data stored in said block storing sections, respectively, when all said parts of said sub-image data, which are determined to be displayed, are stored in a plurality of said block storing sections by said reading out section, for one block of a plurality of said divided blocks; and a superposing and outputting section that generates superposed image data obtained by superposing said compound sub-image part data corresponding to each of said blocks of said pixel line, respectively, on said main image data corresponding to said pixel line, and then outputs said generated superposed image data on said displaying section.