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公开(公告)号：US4700114A
公开(公告)日：1987-10-13
申请号：US852358
申请日：1986-04-15
摘要： A vertical deflection amplifier of a video display apparatus includes first and second transistor amplifier output stages arranged in a totem-pole, push-pull configuration. A vertical deflection winding is coupled to the output stages at a deflection amplifier output terminal. An S-capacitor is coupled to the deflection winding at a second terminal remote from the output terminal. A source of deflection rate signals is coupled to the deflection amplifier for generating a deflection current in the deflection winding. A base current generating circuit is coupled to one of the transistor amplifier output stages for providing base current thereto. The S-capacitor voltage is applied to the base current generating circuit for enabling conduction of base current in the one amplifier output stage. When the video display apparatus is first turned on, the initially discharged S-capacitor is slowly charged from a DC voltage supply to delay generation of vertical deflection past completion of picture tube degaussing.
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2.发明授权Auxiliary kinescope beam current limiter with plural cascaded low pass filter and peak detector stages 失效辅助显像管光束限流器，具有多个级联低通滤波器和峰值检测器级
公开(公告)号：US4689668A
公开(公告)日：1987-08-25
申请号：US885163
申请日：1986-07-14
CPC分类号： H04N9/645
摘要： An auxiliary kinescope beam current limiter in a television receiver includes a control circuit responsive to a sensed signal representative of the combined instantaneous magnitudes of plural color video signals. The control circuit includes, in the order named, a first low pass filter, a first peak detector, a second low pass filter, and a second peak detector which provides a control signal to video signal processing circuits for limiting the amplitudes of the plural color video signals when a given amplitude threshold value is sensed as having been exceeded. The auxiliary beam current limiter is able to prevent warping or blistering of a shadow mask in a color kinescope due to scenes having a high beam current in, for example, an area equal to or greater than five to ten percent of the display screen area of the kinescope in both the horizontal and vertical directions.
摘要翻译： 电视接收机中的辅助显像管束电流限制器包括响应于表示多个彩色视频信号的组合瞬时幅度的感测信号的控制电路。 所述控制电路按照所述顺序包括第一低通滤波器，第一峰值检测器，第二低通滤波器和第二峰值检测器，其向视频信号处理电路提供控制信号，以限制多个颜色的幅度 当感测到给定振幅阈值已经被超过时，视频信号。 辅助光束电流限制器能够防止由于在例如等于或大于显示屏幕面积的百分之五至百分之一的区域中具有高光束电流的场景而导致的彩色显像管中的荫罩的翘曲或起泡 显像管在水平和垂直方向。
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3.发明授权Gullwing distortion corrected deflection circuitry for a square-planar picture tube 失效用于正方形显像管的垂直变形校正偏转电路
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
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。
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公开(公告)号：US4645984A
公开(公告)日：1987-02-24
申请号：US813159
申请日：1985-12-24
CPC分类号： H04N3/233
摘要： A high voltage generator develops an ultor voltage to accelerate an electron beam of a picture tube. The high voltage generator draws a resupply current in accordance with beam current loading by the picture tube. The deflection circuitry generates line and field deflection currents in respective line and field deflection windings to enable the electron beam to scan a raster. A diode modulator, including a differential amplifier input stage and an emitter-follower output stage, modulates the amplitude of the line deflection current to provide side pincushion correction. The voltage at a high voltage resupply current terminal of the high voltage generator is coupled in a nonlinear manner to the differential amplifier for nonlinearly modulating the amplitude of the line deflection current in accordance with beam current loading.
摘要翻译： 高压发生器产生阳极电压以加速显像管的电子束。 高电压发生器根据显像管的电流负载提取补充电流。 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，以使电子束能够扫描光栅。 包括差分放大器输入级和射极跟随器输出级的二极管调制器调制线偏转电流的幅度以提供侧枕形校正。 高压发生器的高电压补充电流端子处的电压以非线性方式耦合到差分放大器，用于根据束电流负载非线性地调制线偏转电流的幅度。
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