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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMasahiro Naito, Shuji Sotoda, Takuji Kurashita, Kazuhiro Sugiyama
Estimating the term…
In order to reduce the power consumed by the circuit when the image data is transferred to a memory in a display means, a write region detecting means 8 is provided to detect the address region in the graphics memory 2 accessed for writing by the image data writing means 1, and only such data that is within the region including the addresses accessed by the writing means 1 is transferred to the memory 5 in the display means 4. The region including the accessed addresses may for example a rectangular region of from the minimum vertical direction address to the maximum vertical direction address Y among the accessed addresses, and from the minimum horizontal direction address to the maximum horizontal direction address among the accessed addresses.
A display control device including an image data writing means, a graphics memory connected to the writing means, a data transfer means responsive to a command from the writing means for reading data from the graphics memory, and transferring data to a display means, and a write region detection means responsive to addresses accessed by the image data writing means for detecting a region including all the addresses, wherein when the image data writing means issues a transfer command, said transfer means transfers to the display means only such data that is in the region detected by said write region detecting means.
Dependencies are inferred from the claim text.