公开(公告)号：US5237246A

公开(公告)日：1993-08-17

申请号：US889713

申请日：1992-05-28

申请人： Gunter Gleim ,  Friedrich Heizmann ,  Jaques Chauvin

发明人： Gunter Gleim ,  Friedrich Heizmann ,  Jaques Chauvin

IPC分类号： H04N3/22 ,  H04N5/74 ,  H04N9/28

CPC分类号： H04N9/28 ,  H04N3/22 ,  H04N5/74

摘要： A system for adjusting the position and size of a picture generated by deflecting a light source in response to a deflection current and displayed in a picture area larger than the picture includes sensors for sensing the picture arranged outside the picture and within the picture area. First and second differential amplifier both have an inverting and noninverting input terminal. A deflection voltage proportional to the deflection current is applied to the noninverting input terminal of the first differential amplifier and to inverting input terminal of the second differential amplifier. A first reference voltage is applied to the inverting input terminal of the first differential amplifier to produce a positive correction pulse in accordance with the difference between the deflection voltage and the first reference voltage. A second reference voltage is applied to the noninverting input terminal of the second differential amplifier to produce a negative correction pulse in accordance with the difference between the deflection voltage and the second reference voltage. A correction signal generator is responsive to the correction pulses and provides correction signals to the deflection circuit.

摘要翻译： 用于调整通过响应偏转电流偏转光源并显示在比图像大的图像区域中显示的图像的位置和尺寸的系统包括用于感测布置在图像外部和图像区域内的图像的传感器。 第一和第二差分放大器都具有反相和同相输入端。 与偏转电流成比例的偏转电压被施加到第一差分放大器的非反相输入端子和第二差分放大器的反相输入端子。 第一参考电压被施加到第一差分放大器的反相输入端，以根据偏转电压和第一参考电压之间的差产生正校正脉冲。 第二参考电压被施加到第二差分放大器的非反相输入端子，以根据偏转电压和第二参考电压之间的差产生负校正脉冲。 校正信号发生器响应校正脉冲并向偏转电路提供校正信号。

公开(公告)号：US5283504A

公开(公告)日：1994-02-01

申请号：US920360

申请日：1992-07-29

申请人： Jaques Chauvin ,  Rainer Schweer ,  Gunter Gleim ,  Friedrich Heizmann

发明人： Jaques Chauvin ,  Rainer Schweer ,  Gunter Gleim ,  Friedrich Heizmann

IPC分类号： H04N3/22 ,  H04N3/23 ,  H04N9/28 ,  H04N17/04 ,  H01J29/56

CPC分类号： H04N3/22

摘要： A grid correction circuit for a television receiver includes a first memory for storing correction values for correcting the deflection current of the television receiver. A second memory perodically provides a test signal to a correction coil to correct the deflection of the television receiver. A switch periodically selectively connects the first memory to the correction coil and a correction current flows through the correction coil. The switch also periodically connects the second memory to the correction coil and a test current flows through the correction coil. An impedance is responsive to the correction coil and produces a correction voltage and a test voltage in response to the correction current and the test current respectively. A comparator receives the test voltage and compares the test voltage to a reference voltage and provides an output voltage having a first level when the test voltage is below the reference voltage and a second level when the test voltage is above the reference voltage. A processor receives the output voltage and changes the correction voltage to incrementally reciprocate above and below the reference voltage by a preslected increment to maintain the correction voltage at substantially the same level as the reference voltage over a long time period.

摘要翻译： 用于电视接收机的格栅校正电路包括用于存储用于校正电视接收机的偏转电流的校正值的第一存储器。 第二存储器向校正线圈提供测试信号以校正电视接收机的偏转。 开关周期性选择性地将第一存储器连接到校正线圈，并且校正电流流过校正线圈。 开关还周期性地将第二存储器连接到校正线圈，并且测试电流流过校正线圈。 阻抗响应于校正线圈并分别响应于校正电流和测试电流产生校正电压和测试电压。 比较器接收测试电压并将测试电压与参考电压进行比较，并且当测试电压低于参考电压时提供具有第一电平的输出电压，并且当测试电压高于参考电压时提供第二电平。 处理器接收输出电压并改变校正电压以在参考电压之上和之下递增地往复运动一个预设的增量，以将校正电压维持在与参考电压相当长的时间段基本相同的水平。