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US 4,731,673 AGranted
Image output device
AssigneeCanon Kabushiki Kaisha
InventorTadashi Yamakawa
Life of this patent
Estimating the term…
Abstract
An image output device has a plurality of memories each capable of reading and writing parallel data transferred in, means for instructing reading of the image data parallelly written in parallel in the memories, and a plurality of dot forming means for forming dots in accordance with the image data read from the memories.
Claims21
An image output device comprising:
- a plurality of memory means each capable of writing or reading image data transferred in parallel, wherein each of said memory means has parallel data input terminals, parallel data output terminals, a serial data output terminal and a control signal input terminal, said parallel data output terminals are capable of connecting to parallel data input terminals of another memory means, and said memory means has a load mode for writing image data input through said parallel data input terminals and shift mode for outputting written image data from said serial output terminal, said load mode or shift mode being selected in accordance with a control signal for controlling data read, said control signal being input through said control signal input terminal;
- clock means for providing a clock signal, said clock signal being used for parallel transfer of image data between said plurality of memory means in said load mode and for serial output of image data in said plurality of memory means in said shift mode, wherein said clock signal has a first frequency in said load mode and a second frequency lower than the first frequency in said shift mode;
- and
- a plurality of dot forming means for forming dots in accordance with image data serially read from said plurality of memory means.
1 more element
An image device comprising:
- a plurality of count means having memory means capable of writing or reading image data transferred in parallel, each said count means having parallel data input terminals, parallel data output terminals and a control signal input terminal, said parallel data output terminals being capable of connecting to parallel data input terminals of another count means and said count means having a load mode for writing image data input through said parallel data input terminals and a count mode for counting written image data up or down, wherein said load mode or said count mode is selected in accordance with a control signal for controlling data read, said control signal being input through said control signal input terminal;
- clock means for providing a clock signal, said clock signal being used for parallel transfer of image data between said plurality of count means in said load mode and for counting image data in said plurality of count means up or down in said count mode, wherein said clock signal has a first frequency in said load mode and a second frequency lower than the first frequency in said count mode;
- and
- a plurality of dot forming means for forming dots in accordance with count outputs from said plurality of count means.
1 more element
An image output device comprising:
- count means capable of writing image data transferred, said count means counting data based on said written image data up or down and having a carry signal output terminal for outputting a carry signal;
- and
- a plurality of dot forming means for forming dots in accordance with said carry signal output from said count means, said dot forming means forming dots until said carry signal is output.
An image output device comprising:
- a plurality of memory means each capable of writing or reading image data transferred in parallel;
- select means for selecting a load mode for transferring image data in order between said plurality of memory means or a shift mode for serially reading image data from said memory means;
- clock means for providing a first clock signal of a first frequency used for parallel transfer of image data in said load mode and a second clock signal of a second frequency used for serial output of image data in said shift mode, said first frequency being higher than said second frequency;
- a plurality of dot forming means for forming dots in accordance with image data serially read from said plurality of memory memory means;
- and
- gating means adapted for inhibiting operation of said plurality of dot forming means.
3 more elements
Dependencies are inferred from the claim text.