公开(公告)号：US06970203B2

公开(公告)日：2005-11-29

申请号：US10225120

申请日：2002-08-22

申请人： Yutaka Otani ,  Masahiko Sasada ,  Nobuo Taketani ,  Masahiro Takeshima ,  Hiroshi Moribe

发明人： Yutaka Otani ,  Masahiko Sasada ,  Nobuo Taketani ,  Masahiro Takeshima ,  Hiroshi Moribe

IPC分类号： H04N9/73 ,  H04N9/64 ,  H04N9/72 ,  H04N5/68

CPC分类号： H04N9/645 ,  H04N9/72

摘要： The automatic cut-off system includes a video data processing circuit, a cut-off control circuit, a drive circuit, and a level control section. The video data processing circuit adds a cut-off reference pulse having a predetermined level to primary-color signals of red (R), green (G) and blue (B) at different timings within a single vertical blanking interval, and outputs latch timing signals respectively indicating the timings. The cut-off control circuit shifts a level of each primary-color signal having the cut-off reference pulse added thereto based on a corresponding cut-off control signal. The drive circuit drives each cathode of a CRT (cathode-ray tube) based on a corresponding one of the shifted primary-color signals, and outputs a voltage corresponding to each cathode current as a common feedback signal. The level control section latches the feedback signal in response to each latch timing signal, and outputs the cut-off control signal of one of the primary-color signals.

摘要翻译： 自动切断系统包括视频数据处理电路，截止控制电路，驱动电路和电平控制部分。 视频数据处理电路在单个垂直消隐间隔内的不同定时将具有预定电平的截止参考脉冲与红（R），绿（G）和蓝（B）的原色信号相加，并输出锁定定时 信号分别表示时间。 截止控制电路基于对应的截止控制信号，移动其中附加有截止参考脉冲的每个原色信号的电平。 驱动电路基于相应的一个移位的原色信号驱动CRT（阴极射线管）的每个阴极，并且输出与每个阴极电流相对应的电压作为公共反馈信号。 电平控制部分响应于每个锁存定时信号锁存反馈信号，并输出一个原色信号的截止控制信号。

公开(公告)号：US20040080617A1

公开(公告)日：2004-04-29

申请号：US10281827

申请日：2002-10-28

申请人： KONINLIJKE PHILIPS ELECTROICS N.V.

发明人： Andre Poelen

IPC分类号： H04N003/20 ,  H04N005/63

CPC分类号： H04N9/645 ,  H04N3/24 ,  H04N5/141 ,  H04N5/68

摘要： A method and apparatus for suppressing aesthetic imperfections of a video signal when displayed on a cathode ray tube (CRT) display by compensating for both the picture tube characteristics (e.g. spread, temp drift and ageing of the red, green, blue amplifier and picture tube) and the temperature behavior (e.g. a warm and a cold picture tube start-up behavior) of the picture tube.

摘要翻译： 一种通过补偿显像管特性（例如，红色，绿色，蓝色放大器和显像管的扩展，温度漂移和老化）而在阴极射线管（CRT）显示器上显示时抑制视频信号的美学缺陷的方法和装置 ）和显像管的温度行为（例如，暖和冷显像管启动行为）。

公开(公告)号：US06545717B1

公开(公告)日：2003-04-08

申请号：US09963193

申请日：2001-09-26

申请人： William G. Miller ,  Mark Laramie ,  Gregg Keck

发明人： William G. Miller ,  Mark Laramie ,  Gregg Keck

IPC分类号： H04N568

CPC分类号： H04N9/645 ,  H04N9/72

摘要： A display system (10) which includes a CRT feedback current simulating circuit (20) to simulate the cathode feedback current directly from the from the red, green and blue output biases of the video processor (13). Furthermore, the display system (10) applies blanking to the references pulses applied to the CRT output driving stage (16) so that the reference pulses will not be visible during a vertical underscanned condition. Shifting the generation of the cathode feedback current prior to the application of the blanking prevents any significant distortion, modification or skewing of the cathode feedback current sensed by the AKB sensing circuitry (19) of the video processor (13).

摘要翻译： 一种显示系统（10），其包括CRT反馈电流模拟电路（20），用于直接从视频处理器（13）的红色，绿色和蓝色输出偏压模拟阴极反馈电流。 此外，显示系统（10）对施加到CRT输出驱动级（16）的参考脉冲进行消隐，使得在垂直暗视条件下参考脉冲将不可见。 在施加消隐之前移动阴极反馈电流的产生防止由视频处理器（13）的AKB感测电路（19）感测到的阴极反馈电流的任何显着的失真，修改或偏斜。

公开(公告)号：US5835161A

公开(公告)日：1998-11-10

申请号：US804848

申请日：1997-02-24

申请人： Anton Werner Keller

发明人： Anton Werner Keller

IPC分类号： H04N5/202 ,  H04N5/66 ,  H04N5/68 ,  H04N9/64 ,  H04N9/69

CPC分类号： H04N9/645 ,  H04N9/69

摘要： An amplifier (60) provides an amplified video signal in response to a video input signal supplied thereto. A cathode current sensor (Q3), couples an output of the amplifier to the cathode of a kinescope (20) and also provides an output current (Ik) proportional to the kinescope cathode current. A feedback path (82) applies a portion of the sensed cathode current provided by the cathode current sensor to a circuit node (65 or 63) in the amplifier for imparting gamma correction to images produced by the kinescope. In one application the cathode current is apportioned (Q3, Q5) to provide gamma correction for the kinescope and to provide automatic kinescope bias (AKB) control.

摘要翻译： 放大器（60）响应于提供给其的视频输入信号提供放大的视频信号。 阴极电流传感器（Q3）将放大器的输出耦合到显像管（20）的阴极，并且还提供与显像管阴极电流成比例的输出电流（Ik）。 反馈路径（82）将由阴极电流传感器提供的感测阴极电流的一部分施加到放大器中的电路节点（65或63），以对由显像管产生的图像进行伽马校正。 在一个应用中，分配阴极电流（Q3，Q5）以提供显像管的伽马校正并提供自动显像管偏置（AKB）控制。

公开(公告)号：US4987350A

公开(公告)日：1991-01-22

申请号：US402075

申请日：1989-09-01

申请人： Uwe Hartmann ,  Fritz Ohnemus

发明人： Uwe Hartmann ,  Fritz Ohnemus

IPC分类号： H04N9/64

CPC分类号： H04N9/645

摘要： A video-display unit in which the beam current of a cathode-ray tube is measured for a predetermined time interval during display of some lines exterior to an image, for establishing automatic cutoff for the electronic beam. This electron beam is defocused during that predetermined time interval, and the defocusing is independent of the contents of the image, so that initial lines are substantially invisible. An electronic switch may be provided for decreasing the focusing voltage of the cathode ray tube. The electronic switch may be a high-vacuum tube connected to the focusing electrode of the cathode-ray tube, or this switch may be a transistor connected through a transformer to the focusing electrode. The transformer may be attenuated.

摘要翻译： 一种视频显示单元，其中在显示图像外部的一些线之前，以预定的时间间隔测量阴极射线管的束电流，以建立用于电子束的自动切断。 该电子束在该预定的时间间隔内散焦，并且散焦与图像的内容无关，使得初始线基本上是不可见的。 可以提供电子开关用于降低阴极射线管的聚焦电压。 电子开关可以是连接到阴极射线管的聚焦电极的高真空管，或者该开关可以是通过变压器连接到聚焦电极的晶体管。 变压器可能衰减。

公开(公告)号：US4723158A

公开(公告)日：1988-02-02

申请号：US863223

申请日：1986-05-14

申请人： Michael G. White

发明人： Michael G. White

IPC分类号： H04N9/64 ,  H04N9/73 ,  H04N5/68 ,  H04N9/16 ,  H04N9/20

CPC分类号： H04N9/645 ,  H04N9/73

摘要： A disclosed last-line overscan system and method allow for sampling of video display characteristics such as RGB cathode currents during each frame of displayed video for an underscanned video monitor without distortion of the visual display. Detection of the initiation of the vertical sync signal operates to overscan the last display line by driving the trace off the visual display area and away from the active raster. Sampling may then occur during an interval in which no visual display is possible thereby preventing distortion of visual information and preventing undesired brightness in the active raster. Subsequent to the interval for sampling of the RGB beam currents, vertical retrace is effectuated for display of the succeeding video frame. The video trace of the raster is bumped from the video display area and beyond the normal viewing area or escutcheon of the CRT screen during last-line overscan by providing a current surge for a preselected interval sufficient to allow for desired diagnostic sampling and testing, such as cathode current sampling.

摘要翻译： 所公开的最后一行过扫描系统和方法允许在不显示视觉显示的失真的情况下，对显示视频的每帧期间的视频显示特性（例如RGB阴极电流）进行采样，用于视频监视器。 垂直同步信号的启动的检测通过将迹线从视觉显示区域驱动而远离有效光栅来过扫描最后的显示线。 然后可以在没有可视显示可能的间隔期间进行采样，从而防止视觉信息的变形并防止有效光栅中的不期望的亮度。 在RGB束电流采样的间隔之后，实现垂直回扫以显示后续的视频帧。 光栅的视频轨迹在视频显示区域被撞击，并且在最后一行过扫描期间超出CRT屏幕的正常观看区域或锁孔，通过提供足以允许期望的诊断采样和测试的预选间隔的电流浪涌，例如 作为阴极电流采样。

公开(公告)号：US4518986A

公开(公告)日：1985-05-21

申请号：US454446

申请日：1982-12-29

申请人： Werner Hinn ,  Hans-Rudolf Fecht

发明人： Werner Hinn ,  Hans-Rudolf Fecht

IPC分类号： H04N9/64 ,  H04N9/72 ,  H04N9/62

CPC分类号： H04N9/72 ,  H04N9/645

摘要： Apparatus for adjusting the black image current bias of a kinescope in a video signal display system includes means for developing a control signal representative of the black current bias condition of the kinescope. The control signal is developed in response to a sample of an integrated group of sensed bias representative signals developed over several horizontal line intervals which are significant in number relative to the number of horizontal line intervals associated with a vertical field interval. In the case of a color kinescope having plural electron guns, plural groups of signals respectively representative of the black current bias of each electron gun are developed. The plural signal groups exhibit a mutually time sequential relationship and are processed by a common signal processor to develop an integrated version of each of the bias representative signal groups.

摘要翻译： 用于调整视频信号显示系统中显像管的黑色图像电流偏压的装置包括用于开发代表显像管的黑色电流偏置状态的控制信号的装置。 控制信号响应于在几个水平线间隔上产生的感测到的偏置代表信号的集合的样本而被开发，其数量相对于与垂直场间隔相关联的水平线间隔的数量是有意义的。 在具有多个电子枪的彩色显象管的情况下，分别表示各电子枪的黑电流偏置的多组信号。 多个信号组表现出相互时间顺序的关系，并且由公共信号处理器处理以形成每个偏置代表信号组的集成版本。

公开(公告)号：US4387390A

公开(公告)日：1983-06-07

申请号：US205820

申请日：1980-11-10

申请人： Daniel L. Reneau ,  Christopher M. Engel

发明人： Daniel L. Reneau ,  Christopher M. Engel

IPC分类号： H04N9/31 ,  H04N9/64 ,  H04N9/20

CPC分类号： H04N9/31 ,  H04N9/645

摘要： An automatic beam current limiting circuit for a color television receiver comprises means for individually monitoring the three cathode currents developed in response to the green, blue and red video drive signals. The video processing unit of the receiver is automatically adjusted in response to any one of the cathode currents exceeding a predetermined level for reducing the video drive signals to limit the excessive cathode current to the predetermined level. As a result, the individual cathode currents are limited to the predetermined level while the combined cathode currents are allowed to substantially exceed this level.

摘要翻译： 用于彩色电视接收机的自动光束电流限制电路包括用于单独监视响应于绿色，蓝色和红色视频驱动信号而产生的三个阴极电流的装置。 响应于任何一个阴极电流超过预定电平，接收器的视频处理单元被自动调整，以减少视频驱动信号，以将过量的阴极电流限制到预定的电平。 结果，单个阴极电流被限制到预定电平，同时允许组合的阴极电流基本上超过该电平。

公开(公告)号：US4209808A

公开(公告)日：1980-06-24

申请号：US023964

申请日：1979-03-26

申请人： Leopold A. Harwood

发明人： Leopold A. Harwood

IPC分类号： H04N5/57 ,  H04N5/59 ,  H04N9/64 ,  H04N5/68

CPC分类号： H04N5/59 ,  H04N9/645

摘要： A video signal processing system is disclosed including a sample and hold comparator arranged in a closed control loop with a video channel including a video amplifier for the purpose of providing automatic brightness control, and an automatic kinescope beam current limiter. The beam current limiter is coupled to a first point in the amplifier for controlling the amplifier signal gain to limit excessive beam current demand in a first control mode. In a second control mode, the beam current limiter cooperates with the automatic brightness control network to control the D.C. output level of the video amplifier in the presence of excessive beam current demand. The comparator response time is slow relative to transient variations of the D.C. level at the amplifier output induced by beam limiter action in the first control mode, but is otherwise sufficient to permit compensation of relatively long term variations in the output D.C. level. Compensation of the transient D.C. variations is provided by coupling transient beam limiter control voltages developed in the first control mode to a second point in the amplifier, for opposing transient D.C. level variations which would otherwise appear at the amplifier output in response to beam limiter action.

摘要翻译： 公开了一种视频信号处理系统，其包括一个采样和保持比较器，该采样和保持比较器配置在具有包括视频放大器的视频通道的封闭控制回路中，用于提供自动亮度控制，以及一个自动显像管电流限制器。 光束电流限制器耦合到放大器中的第一点，用于控制放大器信号增益以在第一控制模式中限制过大的束电流需求。 在第二控制模式中，光束电流限制器与自动亮度控制网络配合，以在存在过大的光束电流需求的情况下控制视频放大器的直流输出电平。 比较器响应时间相对于在第一控制模式中由光束限制器动作引起的放大器输出处的直流电平的瞬态变化是缓慢的，但是否则足以允许补偿输出直流电平中的相对长期变化。 通过将在第一控制模式中产生的瞬态束限制器控制电压耦合到放大器中的第二点来提供瞬态D.C.变化的补偿，用于响应于束限制器动作将出现在放大器输出处的相反的瞬时直流电平变化。

公开(公告)号：US4017681A

公开(公告)日：1977-04-12

申请号：US608393

申请日：1975-08-27

申请人： Wouter Smeulers ,  Willem Hendrik Amsen

发明人： Wouter Smeulers ,  Willem Hendrik Amsen

IPC分类号： H04N3/18 ,  H04N5/14 ,  H04N5/59 ,  H04N9/64 ,  H04N5/68

CPC分类号： H04N9/645 ,  H04N5/141

摘要： A circuit measures the beam current of a cathode ray tube and derives a control signal from it to prevent overdriving and defocussing of the CRT. The circuit can measure both peak and average values and has an isolation circuit, such as an emitter follower, to prevent loading of the cathode circuit of the CRT.

摘要翻译： 电路测量阴极射线管的射束电流，并从中得到控制信号，以防止CRT的过驱动和散焦。 电路可以测量峰值和平均值，并具有隔离电路，例如射极跟随器，以防止CRT阴极电路的负载。