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公开(公告)号：US4680511A
公开(公告)日：1987-07-14
申请号：US845689
申请日：1986-03-28
CPC分类号： H04N5/63 , H02M3/33523 , H02M2001/0032 , Y02B70/16
摘要： An input signal for controlling a television power supply has "power-on" and "power-off" signal states. When the input signal is in the "power-on" state, it couples a clock signal to a primary winding of a transformer causing an alternating current voltage that is conductively isolated from the input signal to be developed across a secondary winding of the transformer. When the input signal is in the "power-off" state, it decouples the clock signal from the primary winding so that no alternating current voltage is developed across the secondary winding. The signal across the secondary winding is demodulated in a demodulator that produces a control signal that is conductively isolated from the input signal. The control signal is coupled to a regulator of the power supply. A power-on state of the control signal occurs when the alternating current voltage is developed at the secondary winding terminal. A power-off state of the control signal occurs when the alternating current voltage is absent.
摘要翻译： 用于控制电视电源的输入信号具有“上电”和“断电”信号状态。 当输入信号处于“上电”状态时，它将时钟信号耦合到变压器的初级绕组，导致与输入信号导电隔离的交流电压，以跨变压器的次级绕组开发。 当输入信号处于“断电”状态时，它会将时钟信号与初级绕组分离，从而在次级绕组之间不产生交流电压。 次级绕组中的信号在解调器中被解调，该解调器产生与输入信号导电隔离的控制信号。 控制信号耦合到电源的调节器。 当在次级绕组端子处产生交流电压时，发生控制信号的通电状态。 当不存在交流电压时，发生控制信号的断电状态。
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2.发明授权Television receiver having different receiver synchronizing characteristics in response to television signal 失效具有响应于电视信号的接收机同步特性不同的电视接收机
公开(公告)号：US4536794A
公开(公告)日：1985-08-20
申请号：US394038
申请日：1982-06-30
CPC分类号： H04N5/05
摘要： A television receiver incorporates synchronizing circuitry which provides different synchronizing characteristics to accommodate different program sources. Illustratively, for receivers having vertical countdown circuits, normal broadcast signal reception causes the vertical synchronizing window to be narrow and the AFC circuits to operate normally. When the video signals originate from a nonbroadcast source, such as a video tape recorder or a video disc player, the synchronizing window is caused to be wide and the AFC circuit speed is increased. The appropriate receiver synchronizing characteristic is selected in response to the selected channel input.
摘要翻译： 电视接收机包括同步电路，其提供不同的同步特性以适应不同的节目源。 说明性地，对于具有垂直倒计时电路的接收机，正常的广播信号接收使得垂直同步窗口变窄，并且AFC电路正常工作。 当视频信号来自诸如录像机或视频盘播放器之类的非广播源时，同步窗口变宽并且AFC电路速度增加。 响应于所选择的信道输入选择适当的接收机同步特性。
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公开(公告)号：US4435731A
公开(公告)日：1984-03-06
申请号：US298389
申请日：1981-09-01
摘要： A television receiver incorporates a common mechanism for disabling the receiver via the high voltage or fault protection circuit and via the remote control during normal operation. In one embodiment, the protection circuit is energized by the remote control in order to turn the receiver off. The remote control is used to reset the protection circuit in order to turn the receiver on.
摘要翻译： 电视接收机包括用于在正常操作期间通过高电压或故障保护电路以及经由遥控器禁用接收器的通用机构。 在一个实施例中，保护电路被遥控器激励以便关闭接收器。 遥控器用于复位保护电路，以打开接收器。
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公开(公告)号：US4317133A
公开(公告)日：1982-02-23
申请号：US192332
申请日：1980-09-29
CPC分类号： H04N5/126
摘要： A television horizontal AFPC system is provided including a first AFPC loop responsive to horizontal sync signals for producing a noise immune signal in phase and frequency synchronism with the horizontal sync signals. A second AFPC loop includes a phase detector responsive to a second horizontal frequency signal and flyback pulses, and produces horizontal deflection drive signals as a function of the phase relationship determined by the phase detector. A delay circuit is responsive to the noise immune horizontal frequency signal for producing the second horizontal frequency signal for the phase detector with a phase delayed with respect to the noise immune signal. A lowpass filter may be provided to delay the application of the flyback pulses to the second phase detector, its delay being chosen in accordance with the delay of the delay circuit so that a centered picture is produced on the television kinescope.
摘要翻译： 提供电视水平AFPC系统，其包括响应于水平同步信号的第一AFPC环路，用于产生与水平同步信号相位和频率同步的噪声免疫信号。 第二AFPC回路包括响应于第二水平频率信号和回扫脉冲的相位检测器，并且产生作为由相位检测器确定的相位关系的函数的水平偏转驱动信号。 延迟电路响应于噪声免疫水平频率信号，用于产生相位检测器的第二水平频率信号，其相位相对于噪声免疫信号被延迟。 可以提供低通滤波器来延迟将回扫脉冲施加到第二相位检测器，其延迟根据延迟电路的延迟来选择，使得在电视显像管上产生居中的图像。
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公开(公告)号：US5489826A
公开(公告)日：1996-02-06
申请号：US286972
申请日：1994-08-08
CPC分类号： H04N3/26
摘要： A projection television receiver has a cathode ray tube with an electron gun for emitting an electron beam incident on a screen, an electromagnetic deflection yoke and an electromagnetic focusing coil. The focusing coil is included in a resonant circuit. The resonant circuit is energized by switching operation of a switching transistor in the vicinity of a retrace interval. Variations of the focusing coil current in the vicinity of the retrace interval provide dynamic focus.
摘要翻译： 投影电视接收机具有带有电子枪的阴极射线管，用于发射入射在屏幕上的电子束，电磁偏转线圈和电磁聚焦线圈。 聚焦线圈包含在谐振电路中。 谐振电路通过在回扫间隔附近的开关晶体管的开关动作而被通电。 在回扫间隔附近的聚焦线圈电流的变化提供动态聚焦。
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公开(公告)号：US5047698A
公开(公告)日：1991-09-10
申请号：US669553
申请日：1991-03-14
摘要： An ultor voltage power supply includes first and second transformer windings that are coupled in series for producing corresponding first and second flyback pulse voltages. A first protection circuit disables the generation of each of the pulse voltages when the amplitude of the first pulse voltage becomes excessive. A second protection circuit disables the generation of each of the pulse voltages when the amplitude of the second pulse voltage becomes excessive.
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公开(公告)号：US4742270A
公开(公告)日：1988-05-03
申请号：US782243
申请日：1985-09-30
CPC分类号： H04N9/29
摘要： A degaussing circuit for a video display apparatus eliminates residual degaussing current flow during operation of the video display apparatus. A capacitor is connected between coil of the degaussing relay and the source of energizing voltage. Application of the energizing voltage to the relay coil energizes the relay and initiates degaussing of the cathode ray tube of the video display apparatus, and also causes the capacitor to begin charging. As the capacitor becomes charged, the degaussing relay becomes deenergized, thereby terminating degaussing current flow. The capacitor charging time constant is selected to allow sufficient time for degaussing to occur before deenergization of the degaussing relay.
摘要翻译： 用于视频显示装置的消磁电路在视频显示装置的操作期间消除了剩余消磁电流。 电容器连接在消磁继电器的线圈和通电电源之间。 向继电器线圈施加通电电压使继电器通电，并启动视频显示装置的阴极射线管的消磁，并且还使电容器开始充电。 当电容器充电时，消磁继电器断电，从而终止消磁电流。 选择电容器充电时间常数以在消磁继电器断电之前允许有足够的时间进行消磁。
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公开(公告)号：US4396948A
公开(公告)日：1983-08-02
申请号：US233480
申请日：1981-02-11
CPC分类号： H04N5/126
摘要： A horizontal deflection turn-on circuit operates in the absence of trigger pulse normally derived by an AFPC loop. Under normal operation, the AFPC loop generates the trigger pulses based on a synchronized phase relationship with sampled flyback pulses. During receiver start-up, the flyback pulses are not present and no trigger pulses are generated. The turn on circuit provides auxiliary pulses which occur later in time than the normal occurrence of the trigger pulses. Means are provided for applying the auxiliary pulses to the horizontal deflection circuit only in the absence of normal trigger pulses.
摘要翻译： 水平偏转开启电路在没有由AFPC回路正常导出的触发脉冲的情况下工作。 在正常操作下，AFPC循环基于与采样的反激脉冲的同步相位关系产生触发脉冲。 在接收机启动期间，反激脉冲不存在，并且不产生触发脉冲。 导通电路提供在时间上比正常发生的触发脉冲发生的辅助脉冲。 提供了仅在没有正常触发脉冲的情况下将辅助脉冲施加到水平偏转电路的装置。
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公开(公告)号：US4134082A
公开(公告)日：1979-01-09
申请号：US864837
申请日：1977-12-27
申请人： Ronald E. Fernsler
发明人： Ronald E. Fernsler
CPC分类号： H04N5/126
摘要： A horizontal oscillator phase-lock loop arrangement compares synchronizing pulses with recurrent ramp signals derived from the horizontal retrace pulses to control the deflection frequency. The ramp signals are generated by a capacitor charged during the retrace interval through a diode from a reference voltage established by a clamp.
摘要翻译： 水平振荡器锁相环布置将同步脉冲与从水平回扫脉冲导出的反复斜坡信号进行比较，以控制偏转频率。 斜波信号由在钳位间隔期间通过二极管从钳位建立的参考电压充电的电容器产生。
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公开(公告)号：US5633566A
公开(公告)日：1997-05-27
申请号：US712955
申请日：1996-09-12
IPC分类号： H04N3/23 , G09G1/00 , G09G1/04 , G09G1/12 , G09G1/28 , H04N3/233 , H04N5/68 , H04N9/28 , G09C1/04 , H01J29/70
摘要： A deflection waveform correction signal generator comprises a multiplying circuit for generating a pincushion correction signal. A horizontal frequency ramp is generated by a clipped retrace pulse. The ramp generator has an output coupled to an integrating circuit for generating a parabolic shaped signal. The ramp generator and ramp integrator are reset at a horizontal rate by reset pulses of differing duration. The different duration of reset pulses results in the parabolic signal having regions of non-parabolic shape. The parabolic shaped signal is coupled to an input of the multiplying circuit. A control circuit is coupled to the parabolic shaped signal for maintaining a peak amplitude thereof by controllable coupling to the ramp generator. A control loop is coupled to the integrator for controlling an integrator input bias current to generate the parabolic shaped signal at a predetermined time interval.
摘要翻译： 偏转波形校正信号发生器包括用于产生枕形校正信号的乘法电路。 通过剪辑回扫脉冲产生水平频率斜坡。 斜坡发生器具有耦合到用于产生抛物线形信号的积分电路的输出。 斜坡发生器和斜坡积分器通过不同持续时间的复位脉冲以水平速率复位。 复位脉冲的不同持续时间导致抛物线信号具有非抛物线形状的区域。 抛物线形信号耦合到乘法电路的输入端。 控制电路耦合到抛物线形信号，用于通过与斜坡发生器的可控耦合来保持其峰值振幅。 控制回路耦合到积分器，用于控制积分器输入偏置电流，以预定的时间间隔产生抛物线形信号。
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