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    • 3. 发明授权
    • Optical scanning technique
    • 光学扫描技术
    • US06211987B1
    • 2001-04-03
    • US09342183
    • 1999-06-29
    • Sang-Shin Park
    • Sang-Shin Park
    • G02B2608
    • H04N1/053H04N1/1135H04N1/12H04N2201/02439H04N2201/0471H04N2201/04741H04N2201/04744H04N2201/04786H04N2201/04793H04N2201/04794
    • An optical scanning system for a printer, for example, includes: an optical scanning unit for scanning light onto an image print region of a photosensitive belt; a photodetector disposed at an edge of the photosensitive belt for receiving the light emitted from the optical scanning unit, and for outputting a pulse signal in response to the received light; a belt position calculator for counting a hold time of the pulse signal output from the photodetector in order to calculate an edge point of the photosensitive belt; a memory for storing information about the delay time from an end point of the pulse signal to a point in time at which the optical scanning unit starts scanning light onto a start point of the image print region of the photosensitive belt; a delay time setting unit for accessing the memory in order to locate delay time information, corresponding to the edge point of the photosensitive belt, output from the belt position calculator; a scanning start signal generator for counting a time duration corresponding to the delay time information output from the delay time setting unit, and for outputting a scanning start signal in accordance therewith; and a scanning controller for controlling the optical scanning unit such that the optical scanning unit emits light corresponding to an image signal in synchronism with the scanning start signal.
    • 例如,用于打印机的光学扫描系统包括:用于将光扫描到感光带的图像打印区域上的光学扫描单元; 光电检测器,其设置在所述感光带的边缘处,用于接收从所述光学扫描单元发射的光,并响应于所接收的光输出脉冲信号; 带位置计算器,用于计数从光电检测器输出的脉冲信号的保持时间,以计算感光带的边缘点; 用于存储关于从脉冲信号的终点到光学扫描单元开始将光照射到感光带的图像打印区域的起始点的时间点的延迟时间的信息的存储器; 延迟时间设定单元,用于访问存储器,以便定位对应于感光带的边缘点的延迟时间信息,从带位置计算器输出; 扫描开始信号发生器,用于对与延迟时间设置单元输出的延迟时间信息相对应的持续时间进行计数,并且用于输出与之相应的扫描开始信号; 以及扫描控制器,用于控制光学扫描单元,使得光学扫描单元与扫描开始信号同步地发出与图像信号相对应的光。