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公开(公告)号：US5323092A
公开(公告)日：1994-06-21
申请号：US99301
申请日：1993-07-29
CPC分类号： H04N3/233
摘要： A deflection apparatus comprises a deflection amplifier coupled to a deflection waveform modulation circuit such as a diode modulator. A source for generating a modulation signal. The modulation signal comprises an AC component and a DC component, each having levels which define an amplitude ratio. An amplifier alters the amplitude ratio, and the altered amplitude ratio signal is coupled to the deflection waveform modulation circuit for deflection waveform modulation.
摘要翻译： 偏转装置包括耦合到诸如二极管调制器的偏转波形调制电路的偏转放大器。 用于产生调制信号的源。 调制信号包括AC分量和DC分量，每个分量具有限定幅度比的水平。 放大器改变振幅比，并且改变的振幅比信号耦合到用于偏转波形调制的偏转波形调制电路。
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公开(公告)号：US5355058A
公开(公告)日：1994-10-11
申请号：US099376
申请日：1993-07-29
CPC分类号： H04N3/2335
摘要： A deflection apparatus comprises a deflection amplifier coupled to a deflection waveform modulation circuit such as a diode modulator. An East-West modulation signal is generated by a digital to analog convertor in accordance with a reference potential coupled thereto. The modulation signal has a DC component for width control, and is coupled to an input of a comparator. The reference potential is also coupled to an input of the comparator to establish a reference bias therefor. The comparator has an output coupled to the deflection waveform modulation circuit to provide the East-West modulation.
摘要翻译： 偏转装置包括耦合到诸如二极管调制器的偏转波形调制电路的偏转放大器。 根据与其耦合的参考电位，由数模转换器产生东西调制信号。 调制信号具有用于宽度控制的DC分量，并且耦合到比较器的输入端。 参考电位还耦合到比较器的输入端以建立其参考偏置。 比较器具有耦合到偏转波形调制电路以提供东西调制的输出。
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公开(公告)号：US5473386A
公开(公告)日：1995-12-05
申请号：US207917
申请日：1994-03-08
CPC分类号： H04N3/27
摘要： A video display has microcomputer control via a data bus and comprises a first sync generator coupled to the data bus for control by data thereon. A second sync generator is without controllable coupling to the data bus. A deflection amplifier is coupled to a deflection coil for generating a deflection current therein. A circuit for controlling the second sync generator is coupled to the first sync generator and is responsive to a digitally controlled signal therefrom. The second generator output signal is coupled to the deflection amplifier for deflection generation responsive to the digitally controlled signal.
摘要翻译： 视频显示器经由数据总线进行微机控制，并且包括耦合到数据总线的第一同步发生器，用于通过数据进行控制。 第二同步发生器不能与数据总线的可控耦合。 偏转放大器耦合到偏转线圈，用于在其中产生偏转电流。 用于控制第二同步发生器的电路耦合到第一同步发生器，并响应于数字控制信号。 第二发生器输出信号耦合到偏转放大器，用于响应于数字控制信号的偏转产生。
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公开(公告)号：US5486866A
公开(公告)日：1996-01-23
申请号：US264132
申请日：1994-06-21
IPC分类号： H04N5/06 , G09G1/04 , G09G1/16 , H03L7/099 , H04N3/16 , H04N5/12 , H04N5/44 , H04N5/66 , H04N17/04 , H04N5/04
摘要： A free running frequency alignment method in a video display having a sync generator comprising a first oscillator having a first frequency and a second oscillator having a second frequency. The first oscillator is phase modulated by the second oscillator which has a free running frequency different from a standard frequency. The free running frequency of the first oscillator is to be controllably aligned to the standard frequency by a method comprising the steps of applying a frequency determining initial control value to the first oscillator and measuring an average free running frequency responsive to the initial control value. An absolute difference frequency is calculated between the average frequency and the standard frequency. The absolute difference frequency is tested for a frequency value less than a predetermined value which signifies an aligned condition. If the difference frequency is less than the predetermined value the alignment is complete. If the difference frequency is greater than the predetermined value the alignment is continued and a new control value is generated responsive to the difference. The new control value is applied to the first oscillator and the steps of average frequency measurement, absolute difference frequency calculation and difference frequency value testing are repeated until alignment is achieved. Upon failure of the difference frequency test, a counter is incremented and the count examined to determine if a predetermined number of alignment attempts have been exceeded. Upon exceeding the predetermined number the alignment is determined to have failed and the alignment is ended.
摘要翻译： 一种具有同步发生器的视频显示器中的自由运行频率对准方法，该同步发生器包括具有第一频率的第一振荡器和具有第二频率的第二振荡器。 第一振荡器由第二振荡器进行相位调制，其具有与标准频率不同的自由运行频率。 第一振荡器的自由运行频率通过一种方法可控地与标准频率对准，该方法包括以下步骤：响应于初始控制值，将频率确定初始控制值应用于第一振荡器并测量平均自由运行频率。 在平均频率和标准频率之间计算绝对差分频率。 对于小于表示对准状态的预定值的频率值来测试绝对差频率。 如果差分频率小于预定值，则对齐完成。 如果差异频率大于预定值，则对准继续进行，并响应于该差产生新的控制值。 将新的控制值应用于第一振荡器，并且重复平均频率测量，绝对差频计算和差频测试的步骤，直到达到对准。 在差频测试失败时，计数器递增，并且检查该计数以确定是否已经超过预定数量的对齐尝试。 当超过预定数量时，对准被确定为失败并且对准结束。
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公开(公告)号：US4812719A
公开(公告)日：1989-03-14
申请号：US183950
申请日：1988-04-20
CPC分类号： H04N3/185
摘要： A switch regulator includes a controllable SCR switch that is coupled in series with a filter inductor and a horizontal deflection generator, and the series combination is coupled across a source of unregulated direct voltage for providing a path for an increasing current flow in the inductor during a portion of a trace interval in which the switch is closed. Horizontal rate signals are coupled from the deflection generator to the switch via a first winding for controlling the opening of the switch. A catch diode is coupled to the filter inductor to form a path for a decreasing current flow in the first inductor during at least a portion of a retrace interval. The first winding is coupled in series with a second inductor to form an arrangement that is coupled between the unregulated voltage and the SCR switch. A current in the second inductor maintains the switch conductive during a portion of retrace that varies in accordance with a beam current for improving regulation of an ultor voltage.
摘要翻译： 开关调节器包括与滤波电感器和水平偏转发生器串联耦合的可控SCR开关，并且串联组合跨越不受调节的直流电压源耦合，以在一段时间内提供用于电感器中增加的电流的路径 开关关闭的跟踪间隔的一部分。 水平速率信号通过用于控制开关开度的第一绕组从偏转发生器耦合到开关。 捕捉二极管耦合到滤波电感器以在回扫间隔的至少一部分期间形成用于在第一电感器中减小的电流的路径。 第一绕组与第二电感器串联耦合以形成耦合在未调节电压和SCR开关之间的布置。 第二电感器中的电流在回扫的一部分期间保持开关导通，该部分根据用于改善阳极电压调节的束电流而变化。
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公开(公告)号：US5013980A
公开(公告)日：1991-05-07
申请号：US265846
申请日：1988-11-01
CPC分类号： H04N5/63
摘要： An input signal at a horizontal frequency is coupled to a deflection circuit through an isolation transformer during a power-on operation but not during a power-off operation. A voltage at a horizontal deflection frequency is developed in a linearity inductor of the deflection circuit. The voltage in the linearity inductor is rectified to produce a rectified signal that is coupled to an input terminal of a regulator oscillator of a power supply. The rectified signal is coupled to the regulator oscillator in an electrically nonisolated manner with respect to electrical shock hazard isolation and is electrically isolated by the transformer from the input signal. The regulator oscillator generates trigger pulses for controlling the switching operation of an SCR switch of the power supply to produce an output supply voltage that energizes the deflection circuit. The regulator oscillator is energized during both power-up and power-off operation and is responsive to the rectified signal to cause the duty cycle of an output signal of the oscillator to increase during power-off operation. The increased duty cycle causes the anode-to-cathode voltage of the SCR switch 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.
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公开(公告)号：US4916366A
公开(公告)日：1990-04-10
申请号：US273529
申请日：1988-11-21
摘要： A horizontal deflection circuit includes a flyback transformer. A secondary winding of the flyback transformer is coupled in series with a diode switch to produce a trace rectified supply voltage that energizes a vertical deflection amplifier. The diode switch also provides switching operation in an East-West diode modulator. During, for example, service mode operation, when the vertical raster is collapsed, the trace current in the secondary winding is substantially reduced. The reduced trace current is sensed for producing a control signal that causes the peak current supplied by the diode switch to the diode modulator to be smaller than the trace current in the secondary winding. This ensures that the diode switch remains conductive throughout horizontal trace, thereby, preventing an undesirable increase in the supply voltage from occuring.
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