公开(公告)号：US4742270A

公开(公告)日：1988-05-03

申请号：US782243

申请日：1985-09-30

申请人： Ronald E. Fernsler ,  George C. Waybright

发明人： Ronald E. Fernsler ,  George C. Waybright

IPC分类号： H04N9/29 ,  H01J29/06

CPC分类号： H04N9/29

摘要： A degaussing circuit for a video display apparatus eliminates residual degaussing current flow during operation of the video display apparatus. A capacitor is connected between coil of the degaussing relay and the source of energizing voltage. Application of the energizing voltage to the relay coil energizes the relay and initiates degaussing of the cathode ray tube of the video display apparatus, and also causes the capacitor to begin charging. As the capacitor becomes charged, the degaussing relay becomes deenergized, thereby terminating degaussing current flow. The capacitor charging time constant is selected to allow sufficient time for degaussing to occur before deenergization of the degaussing relay.

摘要翻译： 用于视频显示装置的消磁电路在视频显示装置的操作期间消除了剩余消磁电流。 电容器连接在消磁继电器的线圈和通电电源之间。 向继电器线圈施加通电电压使继电器通电，并启动视频显示装置的阴极射线管的消磁，并且还使电容器开始充电。 当电容器充电时，消磁继电器断电，从而终止消磁电流。 选择电容器充电时间常数以在消磁继电器断电之前允许有足够的时间进行消磁。

公开(公告)号：US4345275A

公开(公告)日：1982-08-17

申请号：US225811

申请日：1981-01-16

申请人： George C. Waybright

发明人： George C. Waybright

IPC分类号： H04N3/20 ,  H04N5/68

CPC分类号： H04N3/20

摘要： A high voltage generator of a television receiver is responsive to an alternating voltage, such as a retrace pulse voltage, and develops an ultor voltage at an ultor terminal. A high voltage protection circuit includes a comparator that, when activated, disables normal television display. A sense voltage representative of the ultor voltage is coupled to an input terminal of the comparator so as to activate the comparator when the ultor voltage exceeds a predetermined threshold level. A sense voltage representative of the ultor beam current is also coupled to an input terminal of the comparator so as to vary the threshold ultor voltage level at which the comparator is activated in accordance with beam current variations. When the ultor beam current exceeds a level indicative of high voltage generator overload, a switch that is coupled to an input terminal of the comparator changes states to activate the comparator and shut down the high voltage generator.

摘要翻译： 电视接收机的高电压发生器响应诸如回扫脉冲电压的交流电压，并在阳极电极端产生阳极电压。 高电压保护电路包括一个比较器，当被激活时，禁止正常的电视显示。 代表阳极电压的感测电压被耦合到比较器的输入端，以便当阳极电压超过预定阈值电平时激活比较器。 表示高阳光束电流的感测电压也耦合到比较器的输入端，以便根据电流的电流变化来改变比较器被激活的门槛阳极电压电平。 当高阳光束电流超过表示高电压发生器过载的电平时，耦合到比较器的输入端子的开关改变状态以激活比较器并关断高电压发生器。

公开(公告)号：US4682085A

公开(公告)日：1987-07-21

申请号：US733661

申请日：1985-05-10

申请人： Peter E. Haferl ,  Hugh F. Sutherland, II ,  David W. Luz ,  James A. McDonald ,  George C. Waybright ,  Donald H. Willis

发明人： Peter E. Haferl ,  Hugh F. Sutherland, II ,  David W. Luz ,  James A. McDonald ,  George C. Waybright ,  Donald H. Willis

IPC分类号： H04N3/233 ,  H01J29/56

CPC分类号： H04N3/233

摘要： Line and field deflection circuits generate line and field deflection currents in respective line and field deflection windings to scan a raster on the phosphor screen of a square-planar picture tube having an aspherical faceplate. The asphericity of the faceplate subjects the scanned raster to gullwing distortion. A gullwing distortion correction circuit is responsive to signals repeating at line and field rates, respectively, for modulating the field deflection current during a line deflection period within the field deflection trace interval in a manner that corrects gullwing distortion of a corresponding raster scan line.

摘要翻译： 线偏转电路和场偏转电路在相应的线和场偏转绕组中产生线偏转电流和场偏转电流，以扫描具有非球面面板的正方形显像管的荧光屏上的光栅。 面板的非球面性使扫描光栅变为鸥翼变形。 鸥翼畸变校正电路分别响应于以线速率和场速率重复的信号，以便以校正相应的光栅扫描线的鸥翼畸变的方式在场偏转轨迹间隔期间的线偏转期间调制场偏转电流。