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    • 2. 发明授权
    • Signal processing device for automatic-focusing video signal in
electronically controlled photographic camera
    • 用于电子照相相机中的自动对焦视频信号的信号处理装置
    • US4876603A
    • 1989-10-24
    • US173449
    • 1988-03-25
    • Noboru SuzukiShigeo TojiYukio Uenaka
    • Noboru SuzukiShigeo TojiYukio Uenaka
    • G02B7/34
    • G02B7/34
    • A signal processor for an AF video signal in an electronically controlled camera, comprising: a photosensor (20) of the self-scanning type having an electric charge accumulating part (PD) for accumulating signal electric charge therein which corresponds to the object brightness, an exposure monitor (M1', M2', M3') for accumulating electric charge therein which corresponds to the amount of the signal electric charge accumulated in said electric charge accumulating part, and a dark charge monitor (DM1') for accumulating dark charge therein, said photosensor being adapted to sequentially transmit the signal electric charge accumulated in said electric charge accumulating part for transfer to an A/D converter (34); and an automatic gain control circuit (37) for amplifying, thereby automatically gain-controlling, the AF video signal produced from said photosensor when said object contrast is low, in such a manner that a low-contrast corresponding level difference, which is the difference between a high-luminance corresponding level and low-luminance corresponding level of an AF video signal arising from a low-contrast object, approaches a high-contrast corresponding level difference, which is the difference between a high-luminance corresponding level and low-luminance corresponding level of an AF video signal arising from a high-contrast object.
    • 一种用于电子照相机中的AF视频信号的信号处理器,包括:具有电荷累积部分(PD)的自扫描型光电传感器(20),用于在其中累积对应于物体亮度的信号电荷, 用于累积其中对应于在所述电荷累积部分中累积的信号电荷的量的电荷的曝光监视器(M1',M2',M3')和用于在其中累积暗电荷的暗电荷监视器(DM1'), 所述光传感器适于顺序地将累积在所述电荷累积部分中的信号电荷传送到A / D转换器(34); 以及自动增益控制电路(37),用于当所述对象对比度较低时放大,从而自动增益控制从所述光电传感器产生的AF视频信号,使得对比度对应的电平差作为差值 在由低对比度对象产生的AF视频信号的高亮度对应电平和低亮度对应电平之间接近作为高亮度对应电平和低亮度之间的差的高对比度对应电平差 由高对比度物体产生的AF视频信号的相应电平。
    • 3. 发明授权
    • Image magnification control device for a camera
    • 图像放大控制装置
    • US5721976A
    • 1998-02-24
    • US649229
    • 1996-05-17
    • Noboru SuzukiShigeo TojiMasahiro Kawasaki
    • Noboru SuzukiShigeo TojiMasahiro Kawasaki
    • G02B7/10G02B7/28G03B13/00
    • G02B7/102G02B7/282
    • A lens focusing system for a camera. The camera includes a focusing lens that is movable between a first terminus point and a second terminus point. An amount required to move the focusing lens to obtain an in-focus condition is determined, which is used to drive the focusing lens to position the focusing lens at the in-focus condition. A plurality of drive signals are generated in response to the driving of the focusing lens, which are monitored. A monitored position value is established that is based upon the plurality of drive signals monitored by the monitoring means, and the monitored position value is compared with a predetermined position value corresponding to one of the first terminus point and the second terminus point after the lens has been moved by the amount determined to be required to move the focusing lens to obtain the in-focus condition. The focusing lens is then driven in a direction until the focusing lens is prevented from moving when the monitored position value corresponds to a position which is out of a range between the first terminus point and the second terminus point. When the focusing lens has been moved to one of the first terminus point and the second terminus point, the monitored position value is replaced with the predetermined position value.
    • 镜头对焦系统。 相机包括可在第一终点和第二终点之间移动的聚焦透镜。 确定移动聚焦透镜以获得对焦条件所需的量,其用于驱动聚焦透镜以将聚焦透镜定位在对焦状态。 响应被监测的聚焦透镜的驱动而产生多个驱动信号。 建立基于由监视装置监视的多个驱动信号的监视位置值,并且将监视的位置值与对应于镜头具有的第一终点和第二终点之一的预定位置值进行比较 被移动了确定为移动聚焦透镜以获得对焦条件所需的量。 然后,当监视的位置值对应于在第一终点和第二终点之间的范围之外的位置时,聚焦透镜被沿着一个方向被驱动,直到聚焦透镜被阻止移动。 当聚焦透镜已经移动到第一终点和第二终点之一时,监视的位置值被替换为预定位置值。
    • 6. 发明授权
    • Image magnification control device for a camera
    • 图像放大控制装置
    • US5740475A
    • 1998-04-14
    • US649291
    • 1996-05-17
    • Noboru SuzukiShigeo TojiMasahiro Kawasaki
    • Noboru SuzukiShigeo TojiMasahiro Kawasaki
    • G02B7/10G02B7/28G03B13/08
    • G02B7/102G02B7/282
    • An image magnification control device for a camera having a photographic lens. A defocus amount "dx" of an object is detected by analyzing a light that passed through the photographic lens. A control focal length "f1" required to maintain an image magnification is calculated that is based upon the detected defocus amount "dx". Thereafter, it is determined whether the control focal length "f1" falls within a range between a tele terminus focal length "ft" of the photographic lens and a wide terminus focal length "fw" of the photographic lens. A first controller controls a focal length of the photographic lens so as to meet the control focal length "f1" when it is determined that the control focal length falls within the range, while a second controller controls the focal length of the photographic lens so as to meet one of the tele terminus focal length "ft" and the wide terminus focal length "fw" when it is determined that the control focal length "f1" goes beyond the range.
    • 一种用于具有摄影镜头的相机的图像放大控制装置。 通过分析通过摄影镜头的光来检测物体的散焦量“dx”。 计算基于检测到的散焦量“dx”来维持图像倍率所需的控制焦距“f1”。 此后,确定控制焦距“f1”是否在摄影镜头的远端终焦焦距“ft”与摄影镜头的宽终点焦距“fw”之间的范围内。 当确定控制焦距在该范围内时,第一控制器控制摄影镜头的焦距以满足控制焦距“f1”,而第二控制器控制摄影镜头的焦距,以便 当确定控制焦距“f1”超出该范围时,满足远程终端焦距“ft”和宽终端焦距“fw”之一。