公开(公告)号：EP0825785B1

公开(公告)日：2004-12-01

申请号：EP97401832.7

申请日：1997-07-31

申请人： Thomson Consumer Electronics, Inc.

发明人： Kuczer, Paul ,  Gorog, Istvan ,  Barbin, Robert Loyd ,  Holtzapple, John Alan ,  Pieri, Roger

IPC分类号： H04N9/29

CPC分类号： H04N9/29

公开(公告)号：EP0825633A1

公开(公告)日：1998-02-25

申请号：EP97401833.5

申请日：1997-07-31

申请人： Thomson Consumer Electronics, Inc.

发明人： Kuczer, Paul ,  Barbin, Robert Loyd

IPC分类号： H01J29/96

CPC分类号： H01J29/96

摘要： A cathode ray tube may utilize a focus mask color-selection structure. The focus mask structure is susceptible to localized, transient short circuit events, or breakdown events. These events may be caused by conductive particulates that become free within the cathode ray tube and provide a short circuit between first and second layers of the focus mask. The breakdown events are undesirable because they may result in cross-strand currents causing mask strand magnetization that can interfere with a video image on the screen of the cathode ray tube. A transformer rapidly senses random changes in a voltage or a current supplied to the second layer of the focus mask. A pulse waveform generator is coupled to the transformer and provides a pulse waveform responsive to the sudden change in voltage or current.

摘要翻译： 阴极射线管可以利用聚焦掩模颜色选择结构。 聚焦掩模结构易受局部，瞬态短路事件或故障事件的影响。 这些事件可能由阴极射线管内变得自由的导电颗粒引起，并且在聚焦掩模的第一和第二层之间提供短路。 击穿事件是不期望的，因为它们可能导致交叉电流引起掩模线磁化，这可能干扰阴极射线管屏幕上的视频图像。 变压器快速感测提供给聚焦掩模的第二层的电压或电流的随机变化。 脉冲波形发生器耦合到变压器，并提供响应于电压或电流的突然变化的脉冲波形。

公开(公告)号：EP0825633B1

公开(公告)日：2004-09-22

申请号：EP97401833.5

申请日：1997-07-31

申请人： Thomson Consumer Electronics, Inc.

发明人： Kuczer, Paul ,  Barbin, Robert Loyd

IPC分类号： H01J29/96

CPC分类号： H01J29/96

公开(公告)号：EP0825785A2

公开(公告)日：1998-02-25

申请号：EP97401832.7

申请日：1997-07-31

申请人： Thomson Consumer Electronics, Inc.

发明人： Kuczer, Paul ,  Gorog, Istvan ,  Barbin, Robert Loyd ,  Holtzapple, John Alan ,  Pieri, Roger

IPC分类号： H04N9/29

CPC分类号： H04N9/29

摘要： A cathode ray tube may utilize a focus mask color-selection structure. The focus mask structure is susceptible to localized, transient short circuit events, or breakdown events. These events may be caused by conductive particulates that become free within the cathode ray tube and provide a short circuit between first and second layers of the focus mask. The breakdown events are undesirable because they may result in cross-strand currents causing mask strand magnetization that can interfere with a video image on the screen of the cathode ray tube. A rapid degaussing operation is initiated during the next subsequent vertical blanking period following detection of the breakdown event.

公开(公告)号：EP0825785A3

公开(公告)日：1999-04-14

申请号：EP97401832.7

申请日：1997-07-31

申请人： Thomson Consumer Electronics, Inc.

发明人： Kuczer, Paul ,  Gorog, Istvan ,  Barbin, Robert Loyd ,  Holtzapple, John Alan ,  Pieri, Roger

IPC分类号： H04N9/29

CPC分类号： H04N9/29

摘要： A cathode ray tube may utilize a focus mask color-selection structure. The focus mask structure is susceptible to localized, transient short circuit events, or breakdown events. These events may be caused by conductive particulates that become free within the cathode ray tube and provide a short circuit between first and second layers of the focus mask. The breakdown events are undesirable because they may result in cross-strand currents causing mask strand magnetization that can interfere with a video image on the screen of the cathode ray tube. A rapid degaussing operation is initiated during the next subsequent vertical blanking period following detection of the breakdown event.

摘要翻译： 阴极射线管可以利用聚焦掩模颜色选择结构。 聚焦掩模结构易受局部，瞬态短路事件或故障事件的影响。 这些事件可能由阴极射线管内变得自由的导电颗粒引起，并且在聚焦掩模的第一和第二层之间提供短路。 击穿事件是不期望的，因为它们可能导致交叉电流引起掩模线磁化，这可能干扰阴极射线管屏幕上的视频图像。 在检测到故障事件之后的下一个垂直消隐期间开始快速消磁操作。