发明名称 PULSE MODULATION SIGNAL GENERATION UNIT, LIGHT SOURCE UNIT, OPTICAL SCANNER, AND IMAGE FORMATION APPARATUS
摘要 PROBLEM TO BE SOLVED: To provide a unit for generating a pulse modulation signal without causing any increase in power consumption. SOLUTION: A pulse modulation signal generation unit has: a circuit 219A for generating a plurality of high-frequency clock signals having phases different from each other; an image data conversion circuit 219B for determining transition timing data including information about a lighting timing at which the light emitting section of a light source transits from a lights-out state to a lighting state and an lights-out timing at which a transition is made from a lighting state to a lights-out state from external image data; and a circuit 219C for generating a pulse modulation signal from transition timing data by receiving any one of the plurality of high-frequency clock signals only during a predetermined period including the lighting timing and the lights-out timing. COPYRIGHT: (C)2009,JPO&INPIT
申请公布号 JP2009196226(A) 申请公布日期 2009.09.03
申请号 JP20080040766 申请日期 2008.02.22
申请人 RICOH CO LTD 发明人 KOZASA MADOKA
分类号 B41J2/44;H04N1/113 主分类号 B41J2/44
代理机构 代理人
主权项
地址