EP0301703A2
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Display control system
Assignee: Sharp Corp
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Filing: 1988-06-27
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Granted: —
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Expires: 2008-06-27
Abstract
Abstract A display control system which comprises a display memory having a serial access port for sending data to a display device and a random access port for data communication with a graphic drawing device, a window buffer memory for storing image data such as sentences and graphic charts, a window controller for controlling the position of the window buffer memory content displayed on the display device, and a selection circuit for selecting a display mode or a graphic drawing mode.
Inventors
- 👤 Toshimi Kiyohara
- 👤 Toshiyam Morita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:14
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A display control system comprising: A display memory having a serial access port for sending data to a display device and a random access port for data communication with a graphic drawing device; a window buffer memory for storing image data such as sentences and graphic charts; a window controller for controlling the position of the window buffer memory content displayed on the display device; and a selection circuit for selecting a display mode or a graphic drawing mode.
Claim 2
Dependent Claim
79 words
A display control system comprising: A display memory having a serial access port for sending data to a display device and a random access port for data communication with a graphic drawing device; a window buffer memory for storing image data such as sentences and graphic charts; a window controller for controlling the position of the window buffer memory content displayed on the display device; and a selection circuit for selecting a display mode or a graphic drawing mode.
Claim 3
Dependent Claim
64 words
The system of claim 1, wherein the selection circuit is switched over for the display mode when the window buffer memory content is to be transferred directly to the display device so as to be displayed overlapping with the display memory content, and for the graphic drawing mode when the window buffer memory content is not to be displayed directly on the display device.
Claim 4
Dependent Claim
58 words
The selection circuit of claim 2, whereby in the display mode, the window buffer memory content is displayed directly on the display device in shared time, whereas in the graphic drawing mode, image data transmission between the window buffer memory and the display memory or graphic drawing in the window buffer memory is carried out without time sharing.
Claim 5
Dependent Claim
132 words
A display control system comprising: a display memory for providing image data for display by a display device; a window memory for storing window image data defining one or more image portions to be displayed by the display device; first control means operable to selectively move the display position of the image portion or portions; and second control means for controlling the supply of image data to the display device, said second control means being operable in a display mode of the system to cause window image data to be supplied direct from the window memory, the window position being changeable in said display mode by operation of said first control means, the system also being operable in a graphic drawing mode to permit data drawing and editing in the window memory.
Claim 6
Dependent Claim
132 words
A display control system comprising: a display memory for providing image data for display by a display device; a window memory for storing window image data defining one or more image portions to be displayed by the display device; first control means operable to selectively move the display position of the image portion or portions; and second control means for controlling the supply of image data to the display device, said second control means being operable in a display mode of the system to cause window image data to be supplied direct from the window memory, the window position being changeable in said display mode by operation of said first control means, the system also being operable in a graphic drawing mode to permit data drawing and editing in the window memory.
References Cited (Backward Citations)
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