Optical scanner having a variable resolution

Details Optical scanner having a variable resolution Optical scanner having a variable resolution

1994-03-16

1996-03-26

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358443, 358455, 358483, 2502081, 348312, H04N 140, H04N 104, H04N 314, H01L 2700

Patent

active

055025781

ABSTRACT:
An optical scanner having a variable resolution wherein an optical detecting unit controlled by a pixel clock signal generates a discrete signal representing pixels scanned in a region. An analog-to-digital converter converts the signal to a digital signal with a preselected resolution controlled by a sample clock generator. The sample clock generator receives the pixel clock signal, and through a counter and a store, operates an addressed, binary data word which is sent to a register. The register is coupled to a further periodic clock generator that controls reading from the register and provides a clock signal with pulses when the bits of the data word assume a first binary state, and no pulses when the bits assume a second binary state. The clock signal is passed to the analog-to-digital converter as a sample clock signal.

REFERENCES:
patent: 4934821 (1990-06-01), Morton
patent: 5303064 (1994-04-01), Johnson et al.
patent: 5402234 (1995-03-01), Deck
patent: 5452109 (1995-09-01), Compton

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