公开(公告)号：US5929909A

公开(公告)日：1999-07-27

申请号：US718824

申请日：1996-09-24

申请人： Herbert Hoelzemann ,  Bernhard Seegert ,  Manfred Spruck

发明人： Herbert Hoelzemann ,  Bernhard Seegert ,  Manfred Spruck

IPC分类号： H04N5/238 ,  H04N5/235 ,  H04N7/14 ,  H04N5/222 ,  H04N5/225

CPC分类号： H04N5/2357 ,  H04N5/235 ,  H04N7/141

摘要： A videophone system having an electronically controlled shutter to vary the amount of light falling onto the target by a shutter, e.g., for a greater or lesser length of time during a short exposure time rather than b y means of a controlled mechanical aperture. Data reduction is used for the transmitted signal, a control circuit is used for the exposure time, and the mains power supply, which produces ambient light, are coupled by means of a PLL circuit so that the exposure time occurs at the same phase of the mains voltage. In this way, interference occurring when data reduction is used for the signal to be transmitted is avoided and macroblocks are not formed when no difference signal is present.

摘要翻译： 一种具有电子控制的快门的可视电话系统，其通过快门改变落在目标上的光量，例如在短曝光时间期间更长或更短的时间长度，而不是控制的机械孔径。 数据减少用于发送信号，控制电路用于曝光时间，而产生环境光的市电电源通过PLL电路耦合，使得曝光时间发生在相同的相位 电源电压。 以这种方式，避免当要发送的信号使用数据缩减时发生的干扰，并且当不存在差分信号时，不形成宏块。

公开(公告)号：US5528297A

公开(公告)日：1996-06-18

申请号：US296082

申请日：1994-08-25

申请人： Bernhard Seegert ,  Fang Lei ,  Dieter Probach ,  Manfred Spruck

发明人： Bernhard Seegert ,  Fang Lei ,  Dieter Probach ,  Manfred Spruck

IPC分类号： G02F1/13 ,  G03B17/48 ,  G03B21/00 ,  H04N5/225 ,  H04N5/232 ,  H04N5/64 ,  H04N5/74

CPC分类号： G03B17/54 ,  G03B17/48 ,  G03B21/006 ,  H04N5/23293 ,  H04N5/7441 ,  H04N9/3176 ,  H04N5/64

摘要： A video camera which is convertable into a projector includes a detachable view finder having an eye-piece for viewing a scene to be recorded and an opto-electrical converter which converts the scene into an electronic image. A coupling supports the view finder during use as a camera or a light source during use as a projector. A display screen receives the electronic image and converts the electronic image into a visible image. A switch selectively connects the display screen to input terminals during use as a camera and to output terminals during use as a projector. The opto-electronic converter is pivotable away from the display screen when the camera is used as a projector.

摘要翻译： 可转换成投影仪的摄像机包括具有用于观看要记录的场景的眼睛的可拆卸取景器和将场景转换为电子图像的光电转换器。 在使用期间，耦合器在作为照相机或光源使用期间支持取景器作为投影仪。 显示屏幕接收电子图像并将电子图像转换成可见图像。 在作为照相机使用期间，开关选择性地将显示屏连接到输入端子，并且在使用期间作为投影仪输出端子。 当相机用作投影机时，光电转换器可以远离显示屏。