SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND IMAGE FORMING APPARATUS

Japanese Patent JP2015221513

A

PROBLEM TO BE SOLVED: To perform signal processing with an accuracy within one clock pulse, using a group of delayed signals delayed by a delay element group delaying a clock.SOLUTION: A signal processing device that generates an output signal from image data by using a clock corresponding to the pixels of the image data, the signal processing device includes: a delayed signal group generating unit that generates a group of delayed signals with a delay element group formed with stages of delay elements, the delay element group delaying the clock in a plurality of stages within a time equivalent to one pulse of the clock; a clock adjusting unit that generates a modulation/synchronization clock from the group of delayed signals by referring to phase data matching the clock with a predetermined phase and frequency modulation coefficient data converting the clock to a predetermined frequency, the modulation/synchronization clock having a frequency and a synchronization state adjusted; and a PWM processing unit that generates a PWM signal from the group of delayed signals by referring to the phase data, the frequency modulation coefficient data, the modulation/synchronization clock, and the image data, the PWM signal having a pulse width corresponding to the value of the image data and being matched with the predetermined frequency while being synchronized with the predetermined phase.

AZUMAI MITSUO

JP2014106397A

December 10, 2015

May 22, 2014

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KONICA MINOLTA INC

B41J2/47; G02B26/10; G03G21/14; H03K5/06; H03K7/08

JP2000198235A	2000-07-18
JP2007237415A	2007-09-20
JP2001088349A	2001-04-03
JP2001268359A	2001-09-28
JP2005202161A	2005-07-28
JP2010194730A	2010-09-09
JP2004046597A	2004-02-12

Fujiharu Ijima

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