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1. 发明授权

US5323092A Deflection waveform correction circuit 失效
标题翻译：偏转波形校正电路
公开(公告)号：US5323092A
公开(公告)日：1994-06-21
申请号：US99301
申请日：1993-07-29
申请人： Kenneth J. Helfrich , Joseph C. Stephens , David R. Jackson
发明人： Kenneth J. Helfrich , Joseph C. Stephens , David R. Jackson
IPC分类号： G09G1/00 , G09G1/04 , H04N3/23 , H04N3/233 , H01J29/56
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。

2. 发明授权

US5486866A Oscillator free run frequency setting by data bus control 失效
标题翻译：通过数据总线控制振荡器自由运行频率设置
公开(公告)号：US5486866A
公开(公告)日：1996-01-23
申请号：US264132
申请日：1994-06-21
申请人： Kenneth J. Helfrich , Joseph C. Stephens , Kevin E. McClain , Brian Lee
发明人： Kenneth J. Helfrich , Joseph C. Stephens , Kevin E. McClain , Brian Lee
IPC分类号： H04N5/06 , G09G1/04 , G09G1/16 , H03L7/099 , H04N3/16 , H04N5/12 , H04N5/44 , H04N5/66 , H04N17/04 , H04N5/04
CPC分类号： H04N5/44 , H04N5/126
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。

3. 发明授权

US5473386A video display device employing two SYNC generators 失效
标题翻译：视频显示设备采用两个SYNC发生器
公开(公告)号：US5473386A
公开(公告)日：1995-12-05
申请号：US207917
申请日：1994-03-08
申请人： Kenneth J. Helfrich , Joseph C. Stephens
发明人： Kenneth J. Helfrich , Joseph C. Stephens
IPC分类号： H04N5/46 , G09G1/14 , H04N3/27 , H04N9/00 , H04N5/06
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。

4. 发明授权

US5475286A Deflection waveform correction circuit 失效
标题翻译：偏转波形校正电路
公开(公告)号：US5475286A
公开(公告)日：1995-12-12
申请号：US99377
申请日：1993-07-29
申请人： David R. Jackson , Kenneth J. Helfrich
发明人： David R. Jackson , Kenneth J. Helfrich
IPC分类号： G09G1/00 , G09G1/04 , H04N3/23 , H04N3/233 , H01J29/56
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 a symmetrical periodic AC component having equal first and second portions of a trace period. A feedback amplifier alters the amplitude of a first portion of the trace period relative to a second portion of the trace period to render the AC component asymmetrical. The asymmetrical AC component 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。调制信号包括具有相同的跟踪周期的第一和第二部分的对称周期性交流分量。反馈放大器相对于迹线周期的第二部分改变跟踪周期的第一部分的幅度，以使AC分量不对称。非对称AC分量耦合到偏转波形调制电路用于偏转波形调制。

5. 发明授权

US5412290A 50 Hz parabolic signal filter 失效
标题翻译： 50 Hz抛物线信号滤波器
公开(公告)号：US5412290A
公开(公告)日：1995-05-02
申请号：US207915
申请日：1994-03-08
申请人： Kenneth J. Helfrich
发明人： Kenneth J. Helfrich
IPC分类号： H04N5/16 , H04N3/16 , H04N3/23 , H04N3/233 , H04N3/27 , H04N9/00 , G09G1/04 , H03K4/08
CPC分类号： H04N3/27 , H04N3/2335
摘要： A scanning waveform generator for operation at a first or a second scanning frequency comprises a source of a parabolic shaped signal having a frequency selectable between the first or second scanning frequency. A means for generating a switching signal indicative of a video signal operating at one of a first or a second scanning frequency. A means for generating a sawtooth shaped waveform is coupled to the switching signal for switching between the first or the second scanning frequency. A means for generating an S correction signal is coupled to the source and to the sawtooth generating means. A means for filtering the parabolic signal is controllably coupled to the switching signal generator, and is also coupled to the S correction signal generating means. The filtered parabolic signal has an substantially the same shape during the first or second scanning frequency.
摘要翻译：用于在第一或第二扫描频率下操作的扫描波形发生器包括具有可在第一或第二扫描频率之间选择的频率的抛物线形信号的源。一种用于产生指示以第一或第二扫描频率之一工作的视频信号的切换信号的装置。用于产生锯齿形波形的装置被耦合到用于在第一或第二扫描频率之间切换的切换信号。用于产生S校正信号的装置耦合到源和锯齿波产生装置。用于滤波抛物线信号的装置可控地耦合到开关信号发生器，并且还耦合到S校正信号产生装置。滤波的抛物线信号在第一或第二扫描频率期间具有基本相同的形状。

6. 发明授权

US5615092A Switching power supply regulator with an inductive pulse circuit 失效
标题翻译：开关电源调节器带有感性脉冲电路
公开(公告)号：US5615092A
公开(公告)日：1997-03-25
申请号：US535802
申请日：1995-09-28
申请人： Kenneth J. Helfrich
发明人： Kenneth J. Helfrich
IPC分类号： H04N3/18 , H02M3/28 , H02M3/335 , H04N3/185 , H01J29/70
CPC分类号： H04N3/185 , H02M3/33569
摘要： A horizontal deflection circuit couples flyback pulses from a first transformer winding to a second transformer winding. The second winding is coupled to a source of unregulated DC voltage. A switch has input, output and control terminals. The output terminal is coupled to the first winding. The switch operates with a variable duty cycle for generating a regulated DC voltage at the output terminal. An inductor and a diode are coupled to the second winding. The inductor is also coupled to the input terminal. A pulse width modulator varies the duty cycle of the switch responsive to feedback and timing signals. Drive voltage for the control terminal is supplied by a first capacitor charged during retrace intervals and a second capacitor charged at the end of the retrace intervals by the first capacitor. The second capacitor is coupled to the control terminal and the drive voltage is discharged by the pulse width modulator.
摘要翻译：水平偏转电路将来自第一变压器绕组的回扫脉冲耦合到第二变压器绕组。第二绕组耦合到未调节的直流电压源。开关有输入，输出和控制端子。输出端子耦合到第一绕组。该开关以可变占空比工作，在输出端产生稳定的直流电压。电感器和二极管耦合到第二绕组。电感器也耦合到输入端子。脉冲宽度调制器根据反馈和定时信号改变开关的占空比。控制端子的驱动电压由回扫间隔期间充电的第一电容器和由回扫间隔结束时由第一电容器充电的第二电容器提供。第二电容器耦合到控制端子，并且驱动电压由脉冲宽度调制器放电。

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