-
-
公开(公告)号：EP0609514A3
公开(公告)日：1994-11-02
申请号：EP93119482.3
申请日：1993-12-03
发明人： Wilber, James Albert
摘要： A television receiver is controlled as to the degree of vertical zoom via a deflection current ramp that varies in slope and which may be delayed to achieve panning. Due to the increased slope when zoomed, the deflection current and the electron beam complete a trace in less time than the normal vertical interval. The deflection current is maintained at one extreme or the other outside the trace interval, and the beam is blanked. A retrace signal generator (10a, C17, U07) coupled in a feedback (IERROR) loop with the power supply for the deflection circuit determines the midpoint of the blanking period and generates a fast retrace (VRESET) at or near the midpoint. The feedback loop is arranged to minimize the DC average current in the deflection winding by having a current source responsive to the DC average current for charging a timing ramp (C17) that triggers retrace upon reaching a threshold. The slope of the timing ramp varies with DC loading, thus advancing or retarding retrace to center retrace in the blanking interval.
-
43.发明公开Vertical retrace circuit with zoom and centered fast retrace 失效Vertikalrücklauf-Schaltung mit Zoom und zentriertemSchnellrücklauf。
公开(公告)号：EP0609514A2
公开(公告)日：1994-08-10
申请号：EP93119482.3
申请日：1993-12-03
发明人： Wilber, James Albert
摘要： A television receiver is controlled as to the degree of vertical zoom via a deflection current ramp that varies in slope and which may be delayed to achieve panning. Due to the increased slope when zoomed, the deflection current and the electron beam complete a trace in less time than the normal vertical interval. The deflection current is maintained at one extreme or the other outside the trace interval, and the beam is blanked. A retrace signal generator (10a, C17, U07) coupled in a feedback (IERROR) loop with the power supply for the deflection circuit determines the midpoint of the blanking period and generates a fast retrace (VRESET) at or near the midpoint. The feedback loop is arranged to minimize the DC average current in the deflection winding by having a current source responsive to the DC average current for charging a timing ramp (C17) that triggers retrace upon reaching a threshold. The slope of the timing ramp varies with DC loading, thus advancing or retarding retrace to center retrace in the blanking interval.
摘要翻译： 通过斜率变化的偏转电流斜坡来控制电视接收机的垂直变焦度，并可延迟实现平移。 由于放大时斜率增加，偏转电流和电子束在比正常垂直间隔更短的时间内完成轨迹。 偏转电流保持在跟踪间隔之外的一个极端或另一个极限，并且光束被消隐。 耦合在反馈（IERROR）环路中的用于偏转电路的电源的回扫信号发生器（10a，C17，U07）确定消隐周期的中点，并在中点处或附近产生快速回扫（VRESET）。 反馈回路被布置为通过使电流源响应于DC平均电流来使偏转线圈中的直流平均电流最小化，以便在达到阈值时触发回扫的定时斜坡（C17）。 时序斜坡的斜率随直流负载而变化，因此在消隐间隔内推进或延迟回扫到中心回扫。
-
44.发明公开Picture height adjustment arrangement for a video display 失效Bild-HöheneinstellungsvorrichtungfürVideoanzeige。
公开(公告)号：EP0578142A2
公开(公告)日：1994-01-12
申请号：EP93110559.7
申请日：1993-07-02
发明人： Wilber, James Albert
IPC分类号： H04N3/22
摘要： A first voltage-to-current converter (Q07,U06A) responsive to a picture height adjustment control signal (V-SIZE) generates a first current (IURAMP) in a capacitor (C03) for producing a trace portion of a sawtooth signal (VSAW) in the capacitor having a rate of change that is adjustable in accordance with an adjustment of the control signal. A second voltage-to-current converter (Q09,U02A) responsive to the control signal generates a second current (I0) in a resistor (R09) for producing a third signal (base voltage of U01C) that is adjustable in accordance with the control signal. The sawtooth and third signals are coupled via a differential amplifier (U01B,U01C) to a vertical deflection winding (Ly,Fig. 1c) to produce a vertical deflection current (iy) in accordance with a difference between the sawtooth and third signals such that picture height adjustment does not affect vertical centering.
摘要翻译： 响应于图像高度调节控制信号（V-SIZE）的第一电压 - 电流转换器（Q07，U06A）在电容器（C03）中产生用于产生锯齿波信号的轨迹部分（VSAW）的第一电流（IURAMP） ）在电容器中具有根据控制信号的调节可调节的变化率。 响应于控制信号的第二电压 - 电流转换器（Q09，U02A）在电阻器（R09）中产生第二电流（I0），用于产生根据控制可调节的第三信号（U01C的基极电压） 信号。 锯齿波和第三信号通过差分放大器（U01B，U01C）耦合到垂直偏转绕组（Ly，图1c），以根据锯齿波和第三信号之间的差产生垂直偏转电流（iy），使得 图像高度调整不影响垂直居中。
-
公开(公告)号：EP0455146A3
公开(公告)日：1992-03-04
申请号：EP91106727.0
申请日：1991-04-25
CPC分类号： H04N3/233
摘要： A parabolic voltage generating circuit includes an arrangement (IC1) for generating a sawtooth vertical deflection current (i V ) that flows in a vertical deflection winding (L V ), in a DC blocking capacitor (C V ) and in a deflection current sampling resistor (R S ). An emitter electrode of a transistor (Q3) is coupled between the deflection winding and the capacitor. A base electrode of the transistor is coupled between the capacitor and the resistance. A collector current (i c ) of the transistor varies in a vertical rate parabolic manner and has a DC average value that is determined by a DC average value of a voltage that is developed in the capacitor. The collector current is applied to an East-West raster distortion correction circuit for modulating an amplitude of a horizontal deflection current.
-
46.发明公开
公开(公告)号：EP0455146A2
公开(公告)日：1991-11-06
申请号：EP91106727.0
申请日：1991-04-25
CPC分类号： H04N3/233
摘要： A parabolic voltage generating circuit includes an arrangement (IC1) for generating a sawtooth vertical deflection current (i V ) that flows in a vertical deflection winding (L V ), in a DC blocking capacitor (C V ) and in a deflection current sampling resistor (R S ). An emitter electrode of a transistor (Q3) is coupled between the deflection winding and the capacitor. A base electrode of the transistor is coupled between the capacitor and the resistance. A collector current (i c ) of the transistor varies in a vertical rate parabolic manner and has a DC average value that is determined by a DC average value of a voltage that is developed in the capacitor. The collector current is applied to an East-West raster distortion correction circuit for modulating an amplitude of a horizontal deflection current.
摘要翻译： 抛物线电压产生电路包括用于产生在垂直偏转绕组（LV）中流过的锯齿波垂直偏转电流（IV），隔直流电容器（CV）和偏转电流采样电阻（RS）中的布置（IC1） 。 晶体管（Q3）的发射极连接在偏转绕组和电容器之间。 晶体管的基极耦合在电容器和电阻之间。 晶体管的集电极电流（ic）以垂直速率抛物线方式变化，并且具有由在电容器中产生的电压的DC平均值确定的DC平均值。 集电极电流被施加到用于调制水平偏转电流的幅度的东西光栅失真校正电路。
-
-
-
-
-
搜索结果
46 条记录 (耗时 0.014 秒)
