公开(公告)号：EP1619796A3

公开(公告)日：2008-12-03

申请号：EP05254414.5

申请日：2005-07-14

申请人： Samsung Electronics Co., Ltd

发明人： Lee, Kwon-cheol ,  Park, Sang-sin

IPC分类号： H03K3/00

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 (100) for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit (120) to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators (100) selected from the plurality of ring oscillators (100) for a predetermined unit time. Moreover, a state sensing unit (140) is provided to detect a state of system environment of the image formation apparatus. A setting control unit (160) is also provided to select and set one of the ring oscillators (100) selected corresponding to change of the loopspeed detected from the loopspeed detection unit (120) among the plurality of ring oscillators (100) in response to the detected state of the state sensing unit (140). Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators (100) 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.

公开(公告)号：EP1619796A2

公开(公告)日：2006-01-25

申请号：EP05254414.5

申请日：2005-07-14

申请人： Samsung Electronics Co, Ltd

发明人： Lee, Kwon-cheol ,  Park, Sang-sin

IPC分类号： H03K3/00

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 (100) for generating different oscillation frequencies. The apparatus further includes a loopspeed detection unit (120) to detect a loopspeed representing the number of pulses generated at the oscillation frequency by one of the ring oscillators (100) selected from the plurality of ring oscillators (100) for a predetermined unit time. Moreover, a state sensing unit (140) is provided to detect a state of system environment of the image formation apparatus. A setting control unit (160) is also provided to select and set one of the ring oscillators (100) selected corresponding to change of the loopspeed detected from the loopspeed detection unit (120) among the plurality of ring oscillators (100) in response to the detected state of the state sensing unit (140). Therefore, even when external environment changes such as temperature and voltage of the image formation apparatus change, the one of the ring oscillators (100) 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： 本发明提供一种环形振荡器设置装置和方法根据到图像形成装置的环境变化。 该装置包括用于生成不同的振荡频率环形振荡器的多个（100）。 该装置还包括一个loopspeed检测单元（120）通过从环形振荡器（100）的多个用于以预定单位时间中选择的环形振荡器（100）中的一个来检测表示在振荡频率产生的脉冲的数目的loopspeed。 更上方，状态感测单元（140）设置用于检测所述图像形成设备的系统环境的状态。 因此，一个设置控制单元（160）被提供给选择和设置所选择的环形振荡器的一个（100）中的对应响应于改变环形振荡器（100）的多元性中从loopspeed检测单元（120）检测到的loopspeed的 上述状态检测单元（140）的检测到的状态。 因此，即使当外部环境的变化：诸如图像形成装置的变化的温度和电压，所选择的环形振荡器（100），所述一个具有loopspeed以生成视频时钟的最佳可设定。 因此，可以最小化由环境改变而造成图像质量下降。