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1. 发明申请

US20060017514A1 Ring oscillator setting apparatus and method depending on environmental changes of an image formation apparatus 失效
标题翻译：环形振荡器设定装置及方法取决于图像形成装置的环境变化
公开(公告)号：US20060017514A1
公开(公告)日：2006-01-26
申请号：US11136584
申请日：2005-05-25
申请人： Kwon-Cheol Lee , Sang-Sin Park
发明人： Kwon-Cheol Lee , Sang-Sin Park
IPC分类号： H03K3/03
CPC分类号： G06F1/06 , H03K3/011 , H03K3/0315 , H03L1/022
摘要： A ring oscillator setting apparatus and method depending on an environmental change of an image formation apparatus is provided. The apparatus includes a plurality of ring oscillators for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators selected from the plurality of ring oscillators for a predetermined unit time. Moreover, a state sensing unit is provided to detect a state of system environment of the image formation apparatus. A setting control unit is also provided to select and set one of the ring oscillators selected corresponding to change of the loopspeed detected from the loopspeed detection unit among the plurality of ring oscillators in response to the detected state of the state sensing unit. Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators selected having the optimal loopspeed to generate a video clock can be set. Therefore, it is possible to minimize degradation of image quality caused by environmental changes.
摘要翻译：提供了一种根据图像形成装置的环境变化的环形振荡器设定装置和方法。该装置包括用于产生不同振荡频率的多个环形振荡器。该装置还包括一个环速检测单元，用于通过预定单位时间内从多个环形振荡器中选择的一个环形振荡器来检测表示在振荡频率下产生的脉冲数的环速。此外，提供状态感测单元以检测图像形成装置的系统环境的状态。还提供了一种设置控制单元，用于响应于状态检测单元的检测状态，选择并设置与多个环形振荡器中的环速度检测单元检测到的环速变化相对应的选择的环形振荡器之一。因此，即使当诸如图像形成装置的温度和电压的外部环境变化改变时，可以设置选择的具有最佳环速以产生视频时钟的环形振荡器之一。因此，可以使由环境变化引起的图像质量的降低最小化。

2. 发明授权

US07307482B2 Ring oscillator setting apparatus and method depending on environmental changes of an image formation apparatus 失效
标题翻译：环形振荡器设定装置及方法取决于图像形成装置的环境变化
公开(公告)号：US07307482B2
公开(公告)日：2007-12-11
申请号：US11136584
申请日：2005-05-25
申请人： Kwon-Cheol Lee , Sang-Sin Park
发明人： Kwon-Cheol Lee , Sang-Sin Park
IPC分类号： H03K3/03 , H03B5/12 , H03L1/00
CPC分类号： G06F1/06 , H03K3/011 , H03K3/0315 , H03L1/022
摘要： A ring oscillator setting apparatus and method depending on an environmental change of an image formation apparatus is provided. The apparatus includes a plurality of ring oscillators for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators selected from the plurality of ring oscillators for a predetermined unit time. Moreover, a state sensing unit is provided to detect a state of system environment of the image formation apparatus. A setting control unit is also provided to select and set one of the ring oscillators selected corresponding to change of the loopspeed detected from the loopspeed detection unit among the plurality of ring oscillators in response to the detected state of the state sensing unit. Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators selected having the optimal loopspeed to generate a video clock can be set. Therefore, it is possible to minimize degradation of image quality caused by environmental changes.
摘要翻译：提供了一种根据图像形成装置的环境变化的环形振荡器设定装置和方法。该装置包括用于产生不同振荡频率的多个环形振荡器。该装置还包括一个环速检测单元，用于通过预定单位时间内从多个环形振荡器中选择的环形振荡器之一检测表示在振荡频率下产生的脉冲数的环速。此外，提供状态感测单元以检测图像形成装置的系统环境的状态。还提供了一种设置控制单元，用于响应于状态检测单元的检测状态，选择并设置与多个环形振荡器中的环速度检测单元检测到的环速变化相对应的选择的环形振荡器之一。因此，即使当诸如图像形成装置的温度和电压的外部环境变化改变时，可以设置选择的具有最佳环速以产生视频时钟的环形振荡器之一。因此，可以使由环境变化引起的图像质量的降低最小化。

3. 发明授权

US07443534B2 Video clock generation apparatus and method 有权
标题翻译：视频时钟生成装置及方法
公开(公告)号：US07443534B2
公开(公告)日：2008-10-28
申请号：US11179465
申请日：2005-07-13
申请人： Kwon-Cheol Lee
发明人： Kwon-Cheol Lee
IPC分类号： G06F15/00 , G06K1/00 , G06K15/12 , G06F3/12
CPC分类号： H04N1/053 , H04N2201/04748 , H04N2201/04767
摘要： A video clock generation apparatus and method are provided. The apparatus comprises a ring oscillator for generating an oscillation frequency; a loopspeed detection unit for detecting a loopspeed that represents the number of pulses generated at the oscillation frequency when the ring oscillator oscillates for a predetermined time; and a video clock generation unit for suppressing generation of front-end video clock signals for a predetermined initial time, and after a first predetermined time following initialization of the effective video clock signals, maintaining a clock state of back-end video clock signals for a second predetermined time, wherein the front-end video clock signals precede effective video clock signals for image formation and the back-end video clock signals follow the effective video clock signals, and wherein the maintained clock state is the clock state prior to the second predetermined time clock signals.
摘要翻译：提供了一种视频时钟产生装置和方法。该装置包括用于产生振荡频率的环形振荡器; 环速检测单元，用于检测环形振荡器在环形振荡器振荡预定时间时以振荡频率产生的脉冲数; 以及视频时钟生成单元，用于在预定的初始时间抑制前端视频时钟信号的产生，并且在有效视频时钟信号初始化之后的第一预定时间之后，维持后端视频时钟信号的时钟状态第二预定时间，其中前端视频时钟信号先于用于图像形成的有效视频时钟信号，并且后端视频时钟信号跟随有效视频时钟信号，并且其中维持的时钟状态是在第二预定时间之前的时钟状态时钟信号。

4. 发明申请

US20060017984A1 Video clock generation apparatus and method 有权
标题翻译：视频时钟生成装置及方法
公开(公告)号：US20060017984A1
公开(公告)日：2006-01-26
申请号：US11179465
申请日：2005-07-13
申请人： Kwon-Cheol Lee
发明人： Kwon-Cheol Lee
IPC分类号： H04N1/36
CPC分类号： H04N1/053 , H04N2201/04748 , H04N2201/04767
摘要： A video clock generation apparatus and method are provided. The apparatus comprises a ring oscillator for generating an oscillation frequency; a loopspeed detection unit for detecting a loopspeed that represents the number of pulses generated at the oscillation frequency when the ring oscillator oscillates for a predetermined time; and a video clock generation unit for suppressing generation of front-end video clock signals for a predetermined initial time, and after a first predetermined time following initialization of the effective video clock signals, maintaining a clock state of back-end video clock signals for a second predetermined time, wherein the front-end video clock signals precede effective video clock signals for image formation and the back-end video clock signals follow the effective video clock signals, and wherein the maintained clock state is the clock state prior to the second predetermined time clock signals.
摘要翻译：提供了一种视频时钟产生装置和方法。该装置包括用于产生振荡频率的环形振荡器; 环速检测单元，用于检测环形振荡器在环形振荡器振荡预定时间时以振荡频率产生的脉冲数; 以及视频时钟生成单元，用于在预定的初始时间抑制前端视频时钟信号的产生，并且在有效视频时钟信号初始化之后的第一预定时间之后，维持后端视频时钟信号的时钟状态第二预定时间，其中前端视频时钟信号先于用于图像形成的有效视频时钟信号，并且后端视频时钟信号跟随有效视频时钟信号，并且其中维持的时钟状态是在第二预定时间之前的时钟状态时钟信号。

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