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Data-processing-system-and-apparatus-and-display-system-with-image-information-memory-control

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Data processing system and apparatus and display system with image information memory control

Details

Inventors: Inoue, Hiroshi; Mizutome, Atsushi; Enomoto, Aiko;
Assignee: Canon Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Brier; Jeffery
Assistant Examiner:
Attorney, Agent or Firm: Fitzpatrick, Cella, Harper & Scinto

A data processing apparatus includes a controller for controlling an image information storage memory. The controller controls the storage memory so that received image information is stored in the image information storage memory as scanning line address information and display information, with the scanning line address information designating scanning lines of a display device which accesses different areas in the image information storage memory. The controller also controls the storage memory so that the scanning line address information and the display information stored in different areas are serially transferred to a drive control in the display device, and so that the scanning address information which is transferred to the drive control accesses the designated scanning lines only. In addition, the image information storage memory is controlled so that a partial rewriting, which scans only scanning lines of the display device corresponding to a rewriting area formed by a partial rewriting of image information stored in the image information storage memory, is executed in a non-interlace scanning and where the rewriting area does not exist, the image information rewriting is executed in an interlace scanning.

DETAILED DESCRIPTION An object of the present invention is to provide a data processing system and apparatus suitable for an image display maintaining a real-time operability as a man-machine interface of a ferroelectric liquid crystal display apparatus.
Another object of the present invention is to provide a data processing system and apparatus using a ferroelectric liquid crystal display apparatus capable of a smooth high-speed display movement of a display font from a pointing device in a scroll display window in a display picture.
Another object of the present invention is to provide a data processing system and apparatus capable of a high-speed cursor movement and mouse movement under scanning drive at a frame frequency as low as 30 Hz or below.
According to a principal aspect of the present invention, there is provided a data processing apparatus, comprising: (a) means for receiving image data having a plurality of graphic events; (b) means for controlling an image data storage memory so that the received image data is stored in the memory in the order of from a higher display priority level of the graphic events based on prescribed display priority levels of the graphic events; and (c) means for controlling the image data storage memory so that the stored image data is transferred in the order of from a higher priority level of the graphic events to drive control means.
According to another aspect of the present invention, there is provided a data processing apparatus, comprising: (a) means for controlling an image data storage memory so that received image data is stored in the image data storage memory; (b) means for serially receiving from the image data storage memory and transferring to drive control means scanning line address data for selecting a scanning line and display data for controlling display data signals applied to data lines associated with the selected scanning line; and (c) means for memorizing the scanning line address data.
These and other objects, features and advantages of the present invention will become more apparent upon a consideration of the following description of the preferred embodiments of the present invention taken in conjunction with the accompanying drawings

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