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">11.发明授权Signal clamp for a dual function input terminal of a "one-chip" television signal processing IC 失效“单芯片”电视信号处理IC的双功能输入端子的信号钳位
公开(公告)号：US5079623A
公开(公告)日：1992-01-07
申请号：US515494
申请日：1990-04-30
CPC分类号： H04N5/57
摘要： A so-called "one-chip" television IC includes a dual purpose input terminal for receiving a control signal representing an image property, such as a contrast, and also a signal having an amplitude within a predetermined range for enabling a test mode of operation. The control signal is generated by at least first and second control circuits. The first control circuit provides a first control signal set by a user. The second control circuit provides a second control signal in response to the image content of an image-representative signal produced by the integrated circuit, and may comprise a beam current limiter responsive to the beam current drawn by an image reproducing device or a circuit responsive directly to the image-representative signal. The first and second control signals are combined to produce a combined control signal which is applied to the dual purpose input terminal. A circuit is coupled to the dual purpose input terminal to inhibit a voltage which extends into the predetermined range corresponding to the test mode from being developed at the terminal in response to the combined control signal.
摘要翻译： 所谓的“单芯片”电视IC包括用于接收表示诸如对比度的图像特性的控制信号的双重目的的输入端子，以及具有在预定范围内的振幅的信号，以实现测试操作模式 。 控制信号由至少第一和第二控制电路产生。 第一控制电路提供由用户设置的第一控制信号。 第二控制电路响应于由集成电路产生的图像代表信号的图像内容提供第二控制信号，并且可以包括响应于由图像再现装置或直接响应的电路所引起的束电流的光束电流限制器 到图像代表信号。 第一和第二控制信号被组合以产生施加到双用途输入端的组合控制信号。 电路耦合到双用途输入端子，以响应于组合的控制信号来抑制延伸到对应于测试模式的预定范围的电压，以在端子处开发。
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12.发明授权Non-linear customer contrast control for a color television with autopix 失效具有自动对焦功能的彩色电视的非线性客户对比度控制
公开(公告)号：US5317400A
公开(公告)日：1994-05-31
申请号：US887737
申请日：1992-05-22
IPC分类号： H04N5/57
CPC分类号： H04N5/57
摘要： In a TV system which includes an autopix feedback loop limiting the range over which the contrast can be controlled, there is included means for generating a non-linear contrast control voltage as a function of customer control settings in order to extend the range over which the customer can control the contrast.
摘要翻译： 在包括限制可以控制对比度的范围的自动翻转反馈回路的电视系统中，包括用于产生作为顾客控制设置的函数的非线性对比度控制电压的装置，以便扩展其范围 客户可以控制对比度。
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公开(公告)号：US5043639A
公开(公告)日：1991-08-27
申请号：US515512
申请日：1990-04-30
申请人： Thomas D. Gurley , Leroy S. Wignot
发明人： Thomas D. Gurley , Leroy S. Wignot
摘要： A television receiver includes a kinescope spot burn protection circuit comprising a capacitor coupled between a source of blanking signal and a control grid of the kinescope for applying negative grid cut-off bias to the kinescope in response to the blanking signal. The amplifier is of the cascode type having a minimum output voltage for peak white levels of a video signal applied to the cathode. The protection circuit includes a potential divider for biasing the kinescope at a positive voltage level related to the minimum output voltage of the amplifier during normal operation of the receiver to maximize the brightness of displayed images. The protection circuit also includes a breakdown device in the potential divider for limiting the maximum grid bias voltage to a level less than the minimum output level of the amplifier but greater than the positive voltage level provided by the potential divider to thereby avoid forward biasing the grid of the kinescope upon termination of the blanking signal which otherwise could occur during recharging of the capacitor.
摘要翻译： 电视接收机包括显像管点燃烧保护电路，其包括耦合在消隐信号源和显像管的控制栅格之间的电容器，用于响应于消隐信号向显像管施加负栅极截止偏压。 该放大器是具有对施加到阴极的视频信号的峰值白电平的最小输出电压的共源共栅型。 保护电路包括一个分压器，用于在接收器的正常操作期间以与放大器的最小输出电压相关的正电压电平来偏压显象管，以使显示图像的亮度最大化。 保护电路还包括在分压器中的击穿器件，用于将最大栅极偏置电压限制到小于放大器的最小输出电平的电平，但大于由分压器提供的正电压电平，从而避免向栅极偏置 在消隐信号终止时，否则可能在电容器再充电期间发生显像管。
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公开(公告)号：US4660093A
公开(公告)日：1987-04-21
申请号：US861302
申请日：1986-05-09
申请人： Randy W. Craig , Thomas D. Gurley
发明人： Randy W. Craig , Thomas D. Gurley
CPC分类号： H04N9/648
摘要： In a color television receiver including a color kinescope and plural kinescope driver stages, a control circuit is included for inhibiting the operation of the driver stages for a short interval after the receiver is energized, particularly under "hot start" conditions, to prevent disturbing artifacts from being displayed by the kinescope. In an illustrated embodiment the driver stages are disabled in response to a control signal applied to a bias point common to the plural driver stages.
摘要翻译： 在包括彩色显象管和多个显像管驱动器级的彩色电视接收机中，包括控制电路，用于在接收器通电之后，特别是在“热启动”条件下，在短时间内禁止驱动器级的操作，以防止干扰伪影 由显像管显示。 在所示实施例中，响应于施加到多个驱动级共用的偏置点的控制信号，驱动级被禁用。
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