-
1.发明授权Video display apparatus comprising a bus controlled compensation circuit using a PWM control signal 失效使用脉冲宽度调制信号通过总线控制的补偿电路的图像显示装置
-
公开(公告)号：EP0910207A2
公开(公告)日：1999-04-21
申请号：EP99100463.1
申请日：1993-08-25
IPC分类号： H04N3/233
CPC分类号： H04N3/233
摘要： A deflection apparatus comprises a deflection amplifier (Q2) coupled to a deflection waveform modulation circuit (400) such as a diode modulator. A source (U1) for generating a modulation signal (E-W). The modulation signal (E-W) comprises an AC component and a DC component, each having levels which define an amplitude ratio. An amplifier (200) alters the amplitude ratio, and the altered amplitude ratio signal is coupled to the deflection waveform modulation circuit (400) for deflection waveform modulation.
摘要翻译： 偏转设备包括耦合到诸如二极管调制器的偏转波形调制电路（400）的偏转放大器（Q2）。 产生调制信号（E-W）的源（U1）。 调制信号（E-W）包括AC分量和DC分量，每个AC分量具有限定振幅比的电平。 放大器（200）改变幅度比，并且改变的幅度比信号被耦合到偏转波形调制电路（400）以进行偏转波形调制。
-
公开(公告)号：EP0367101A3
公开(公告)日：1992-06-03
申请号：EP89119877.2
申请日：1989-10-26
IPC分类号： H04N5/63
CPC分类号： H04N5/63
摘要： An input signal (from 100) at a horizontal frequency is coupled to a deflection circuit (99) through an isolation transformer (T3) during a power-on operation but not during a power-off operation. A voltage (V LIN ) at a horizontal deflection frequency is developed in a linearity inductor (L LIN ) of the deflection circuit. The voltage in the linearity inductor is rectified to produce a rectified signal (V₁₂₁) that is coupled to an input terminal (110a) of a regulator oscillator (110) of a power supply. The rectified signal (V₁₂₁) is coupled to the regulator oscillator (110) in an electrically nonisolated manner with respect to electrical shock hazard isolation, and is electrically isolated by the transformer (T3) from the input signal (from 100). The regulator oscillator (110) generates trigger pulses (S c ) for controlling the switching operation of an SCR switch (200) of the power supply to produce an output supply voltage (B+) that energizes the deflection circuit (99). The regulator oscillator (110) is energized during both power-up and power-off operation and is responsive to the rectified signal (V₁₂₁) to cause the frequency of the trigger pulses (S c ) of the oscillator (110) to increase during power-off operation. The increased frequency causes the anode-to-cathode voltage of the SCR switch (200) to be small enough to prevent latching of the SCR switch during the power-off operation. By preventing SCR switch latching, audible parasitic vibrations in the power supply are avoided.
-
-
公开(公告)号：EP0588115A3
公开(公告)日：1994-08-17
申请号：EP93113541.2
申请日：1993-08-25
IPC分类号： H04N3/233
CPC分类号： H04N3/233
摘要： A deflection apparatus comprises a deflection amplifier (Q2) coupled to a deflection waveform modulation circuit (400) such as a diode modulator. A source (U1) for generating a modulation signal (E-W). The modulation signal (E-W) comprises an AC component and a DC component, each having levels which define an amplitude ratio. An amplifier (200) alters the amplitude ratio, and the altered amplitude ratio signal is coupled to the deflection waveform modulation circuit (400) for deflection waveform modulation.
-
6.发明公开Video display apparatus comprising a bus controlled compensation circuit using a PWM control signal 失效Bildanzeigevorrichtung mit Bus-gesteuerter Kompensationsschaltung unter Verwendung eine Pulsbreitenmodulationssignales
公开(公告)号：EP0817506A2
公开(公告)日：1998-01-07
申请号：EP97110082.1
申请日：1997-06-20
IPC分类号： H04N9/29
CPC分类号： H04N9/29
摘要： A bus controlled pulse modulator receives a digitally coded signal (103) and generates a pulse-width modulated signal. The pulse-width modulated signal is coupled to a base electrode of a non-committed or open collector transistor (Q3). The transistor switches with a controlled duty cycle. The collector of the transistor is coupled to an inverting input terminal of an amplifier (U1) via a resistor (R9). The amplifier produces a compensation current in a tilt compensation coil (W1). The voltage (V3) at the inverting input terminal is maintained constant in closed loop operation. The constant voltage produces a magnitude of a collector current (i1) in the transistor that is unaffected by the duty cycle of the pulse-width modulated signal. The compensation current thereby varies linearly with the duty cycle.
摘要翻译： 总线控制脉冲调制器接收数字编码信号（103）并产生脉冲宽度调制信号。 脉冲宽度调制信号耦合到非提供或集电极开路晶体管（Q3）的基极。 晶体管以受控占空比开关。 晶体管的集电极通过电阻（R9）耦合到放大器（U1）的反相输入端。 放大器在倾斜补偿线圈（W1）中产生补偿电流。 反相输入端的电压（V3）在闭环运行中保持恒定。 恒定电压产生晶体管中不受脉冲宽度调制信号的占空比影响的集电极电流（i1）的幅度。 因此，补偿电流随占空比线性变化。
-
-
公开(公告)号：EP0370660B1
公开(公告)日：1994-04-20
申请号：EP89311611.1
申请日：1989-11-09
-
公开(公告)号：EP0370660A2
公开(公告)日：1990-05-30
申请号：EP89311611.1
申请日：1989-11-09
摘要： A horizontal deflection circuit (100) includes a flyback transformer (T1). A secondary winding (W2) of the flyback transformer (T1) is coupled in series with a diode switch (70) to produce a trace rectified supply voltage (V) that energizes a vertical deflection amplifier (40b). The diode switch (70) also provides switching operation in an East-west diode modulator (30). During, for example, service mode operation, when the vertical raster is collapsed, the current in the secondary winding (W2) during trace is substantially reduced. The reduced current during trace is sensed (by R15) for producing a control signal that causes the peak current supplied to the diode switch (70) by the diode modulator (30) to be smaller than the current in the secondary winding (W2). This ensures that the diode switch (70) remains conductive throughout horizontal trace, thereby preventing an undesirable increase in the supply voltage (V) from occuring.
摘要翻译： 水平偏转电路（100）包括回扫变压器（T1）。 回扫变压器（T1）的次级绕组（W2）与二极管开关（70）串联耦合，以产生对垂直偏转放大器（40b）通电的跟踪整流供电电压（V）。 二极管开关（70）还在东西二极管调制器（30）中提供开关操作。 例如在服务模式操作期间，当垂直光栅被折叠时，跟踪期间次级绕组（W2）中的电流显着减小。 感测跟踪期间的减小的电流（由R15），用于产生使由二极管调制器（30）提供给二极管开关（70）的峰值电流小于次级绕组（W2）中的电流的控制信号。 这确保了二极管开关（70）在整个水平迹线中保持导通，从而防止供应电压（V）的不期望的增加不发生。
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.011 秒)
