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	Laser exposing system and laser printer using the same
	NAKATSUKA, SHINICHI; SAKAMOTO, JYUNSHIN; INENAGA, HIROSHI; SAITO, SUSUMU
	2005-08-04
著作权人	RICOH PRINTING SYSTEMS CO., LTD.
专利号	US20050169329A1
国家	美国
文献子类	发明申请
其他题名	Laser exposing system and laser printer using the same
英文摘要	When a semiconductor laser is energized, a virtual junction temperature rises to reduce a threshold current, which fluctuates a light output by the unit of a several microseconds, thereby causing printing irregularity. An object of the invention is to prevent the fluctuation in light output occurring due to the temperature change caused by the energization of the semiconductor laser with a simple circuit structure and under the driving condition of a small bias current. A constant voltage driving is performed with a circuit or device having negative resistance characteristics being arranged In series with the semiconductor laser. Thus, the reduction in light output of the semiconductor laser due to the temperature rise is compensated for by an increase in driving current thanks to a reduction in rising voltage of current/voltage characteristics.
公开日期	2005-08-04
申请日期	2004-06-21
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/61102]
专题	半导体激光器专利数据库
作者单位	RICOH PRINTING SYSTEMS CO., LTD.
推荐引用方式 GB/T 7714	NAKATSUKA, SHINICHI,SAKAMOTO, JYUNSHIN,INENAGA, HIROSHI,et al. Laser exposing system and laser printer using the same. US20050169329A1. 2005-08-04.

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