Scanning device and image forming apparatus

OPT OpenIR > 半导体激光器专利数据库

	Scanning device and image forming apparatus
其他题名	Scanning device and image forming apparatus
	HOTOGI, TATSUYA; MORI, ATSUNOBU
	2017-12-21
专利权人	CANON KABUSHIKI KAISHA
公开日期	2017-12-21
授权国家	美国
专利类型	发明申请
摘要	A CPU is provided which controls a first light emission state in which a light source is controlled to emit a light beam to scan a full-scanning region and a second light emission state in which the light source is controlled to emit a light beam to scan a non-image region in a period from start of activation of a scanning motor to when the number of rotations of the scanning motor reaches a target number of rotations. The CPU acquires BD cycle values of BD signals generated by a main-scanning synchronization sensor, determines a second timing for changing from the first light emission state to the second light emission state on the basis of the two serial BD cycle values, and changes the semiconductor laser from the first light emission state to the second light emission state according to the second timing.
其他摘要	提供CPU，其控制第一发光状态，其中控制光源以发射光束以扫描全扫描区域;以及第二发光状态，其中控制光源以发射光束以进行扫描在从扫描电机的启动开始到扫描电机的转数达到目标转数的时段中的非图像区域。 CPU获取由主扫描同步传感器产生的BD信号的BD周期值，基于两个串行BD周期值确定用于从第一发光状态改变到第二发光状态的第二时序，并且改变半导体激光器根据第二时序从第一发光状态到第二发光状态。
主权项	A scanning device comprising: a light source configured to emit a light beam; a deflecting unit configured to deflect and scan the light beam emitted from the light source; a driving unit configured to drive the deflecting unit to scan the light beam in a full-scanning region; a generating unit disposed in a second region of the full-scanning region, wherein the second region is excluding a first region on which the light beam based on image data is scanned, and the generating unit is configured to generate a signal in response to reception of the light beam; and a control unit configured to control a first light emission state and a second light emission state in an activation period from start of activation of the driving unit to when the number of rotations of the driving unit reaches a target number of rotations, the control unit controlling the light source to emit light such that the light beam scans the first region and the second region in the first light emission state and controlling the light source to emit light such that the light beam scans the second region, wherein the control unit acquires cycles of the signals generated by the generating unit, determines a timing for changing from the first light emission state to the second light emission state on the basis of the cycles of two serial signals, and changes the light source from the first light emission state to the second light emission state according to the timing.
申请日期	2017-06-01
专利号	US20170363862A1
专利状态	授权
申请号	US15/611608
公开（公告）号	US20170363862A1
IPC 分类号	G02B26/12 \| B41J2/44 \| B41J2/47
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/59151
专题	半导体激光器专利数据库
作者单位	CANON KABUSHIKI KAISHA
推荐引用方式 GB/T 7714	HOTOGI, TATSUYA,MORI, ATSUNOBU. Scanning device and image forming apparatus. US20170363862A1[P]. 2017-12-21.