公开(公告)号：US4623933A

公开(公告)日：1986-11-18

申请号：US566390

申请日：1983-12-28

申请人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Nimura ,  Toshiaki Isogawa ,  Mitsuru Sato

发明人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Nimura ,  Toshiaki Isogawa ,  Mitsuru Sato

IPC分类号： H03G3/20 ,  H03G1/00 ,  H03G3/00 ,  H03G3/30 ,  H04N5/20

CPC分类号： H03G3/3036 ,  H03G1/0023 ,  H04N5/20

摘要： A circuit for controlling the gain of an amplifier typically used in a video camera has a automatic gain control circuit to provide the camera output signal within predetermined limits and a switch to permit exclusion of the automatic gain control feature and the use of a manually variable gain control having a greater range and overlapping that of the automatic gain control to provide further flexibility to the user of the camera so that objects normally too bright or too dark to be accommodated within the range of the automatic gain control circuit can be recorded. Differential amplifiers operating in conjunction with current mirror circuits are provided in both the variable gain amplifier circuit and in the circuit that provides the gain control signal thereto to provide a gain control circuit that lends itself to integrated circuit fabrication.

摘要翻译： 用于控制通常在摄像机中使用的放大器的增益的电路具有自动增益控制电路，用于将相机输出信号提供在预定限度内，并且开关允许排除自动增益控制特征和使用手动可变增益 控制具有更大的范围并且与自动增益控制的范围重叠，从而为摄像机的用户提供更多的灵活性，使得通常太亮或太暗以至于不能容纳在自动增益控制电路的范围内的物体可被记录。 在可变增益放大器电路和向其提供增益控制信号的电路中提供与电流镜电路结合操作的差分放大器，以提供一种增益控制电路，从而将其自身应用于集成电路制造。

公开(公告)号：US4630116A

公开(公告)日：1986-12-16

申请号：US579107

申请日：1984-02-10

申请人： Toshiaki Isogawa ,  Ryuji Shiono ,  Tsutomu Niimura ,  Joichi Sato ,  Mitsuru Sato

发明人： Toshiaki Isogawa ,  Ryuji Shiono ,  Tsutomu Niimura ,  Joichi Sato ,  Mitsuru Sato

IPC分类号： H04N5/14 ,  H04N5/16 ,  H04N5/262

CPC分类号： H04N5/148

摘要： A video signal inverting circuit, wherein a pedestal level of an output signal is selectively changed between a posi-mode and a nega-mode. The pedestal level of the output video signal is set equal to the pedestal level of the posi-mode output video signal in the nega-mode in accordance with a nega-mode/posi-mode control signal. In spite of the nega-mode/posi-mode control signal, a level setting circuit for the posi-mode is used during horizontal blanking period in the nega-mode.

摘要翻译： 一种视频信号反相电路，其中输出信号的基准电平在位置模式和负模式之间选择性地改变。 输出视频信号的基准电平根据负模式/位置模式控制信号被设置为等于负模式中的位置模式输出视频信号的基准电平。 尽管存在负模式/位置模式控制信号，但是在负模式的水平消隐期间使用位置模式的电平设置电路。

公开(公告)号：US4589021A

公开(公告)日：1986-05-13

申请号：US568258

申请日：1984-01-04

申请人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Niimura ,  Toshiaki Isogawa ,  Mitsuru Sato

发明人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Niimura ,  Toshiaki Isogawa ,  Mitsuru Sato

IPC分类号： H04N5/202 ,  H04N5/57 ,  H04N9/69

CPC分类号： H04N5/202

摘要： A circuit having a nonlinear response characteristic provides gamma compensation to a video luminance signal and matches any desired output response curve by selecting the number of diodes connected as series-connected circuits in the compensation circuit. The relationship among the various numbers of series-connected diodes is dependent upon having a current flowing into an output circuit which is the same as a current flowing out of a collector circuit of a differential amplifier, to which the input video luminance signal is applied, and through series-connected diode circuit. These currents are maintained equal by use of a current-mirror circuit, which provides an input current to an output transistor that has in its emitter circuit one of the series-connected diode circuits, and the compensated luminance signal flows in the collector circuit thereof. The differential amplifier is stabilized and balanced by a difference amplifier connected in feedback across the collector leads of the differential amplifier in conjunction with a pedestal clamping synchronization signal and a capacitor to provide a balancing signal at the base lead of the second transistor of the differential transistor amplifier.

摘要翻译： 具有非线性响应特性的电路向视频亮度信号提供伽马补偿，并通过选择在补偿电路中串联连接的电路连接的二极管的数量来匹配任何期望的输出响应曲线。 各种数量的串联二极管之间的关系取决于流入输出电路的电流，该输出电路与从应用输入视频亮度信号的差分放大器的集电极电流流出的电流相同， 并通过串联二极管电路。 这些电流通过使用电流镜电路而保持相等，电流镜电路向输出晶体管提供输入电流，输出晶体管在其发射电路中具有串联二极管电路中的一个，并且经补偿的亮度信号在其集电极电路中流动。 差分放大器通过连接在差分放大器的集电极引线上的差分放大器结合基座钳位同步信号和电容器来稳定和平衡，以在差分晶体管的第二晶体管的基极引线提供平衡信号 放大器

公开(公告)号：US5386231A

公开(公告)日：1995-01-31

申请号：US983251

申请日：1992-11-30

申请人： Shuji Shimizu ,  Toshiaki Isogawa ,  Joichi Sato

发明人： Shuji Shimizu ,  Toshiaki Isogawa ,  Joichi Sato

IPC分类号： H04N5/235 ,  H04N5/243 ,  H04N5/335 ,  H04N5/351 ,  H04N5/353 ,  H04N5/357 ,  H04N5/372 ,  H04N5/376 ,  H04N5/378 ,  H04N3/14

CPC分类号： H04N5/2352 ,  H04N5/2353 ,  H04N5/243

摘要： A video camera includes a solid state image pickup element for converting a light image radiated thereon from an object to be photographed into an electric signal. The element is also operated as a shutter for controlling an amount of light radiated thereon by being controlled in its storage time. The video camera further includes a unit for inputting data for setting a storage time of the image pickup element, and a unit connected to the data inputting unit for controlling the storage time of the element in response to the inputted set data gradually to the set data by changing the storage time by a predetermined storage time for the lapse of every predetermined time period.

摘要翻译： 视频摄像机包括固态摄像元件，用于将从被拍摄对象辐射的光图像转换为电信号。 该元件还作为快门操作，通过在其存储时间中被控制来控制其上辐射的光量。 视频摄像机还包括用于输入用于设置图像拾取元件的存储时间的数据的单元，以及连接到数据输入单元的单元，用于响应于输入的设置数据逐渐地控制元素的存储时间到设置数据 通过在每个预定时间段内经过预定的存储时间来改变存储时间。

公开(公告)号：US5032909A

公开(公告)日：1991-07-16

申请号：US366616

申请日：1989-06-15

申请人： Mitsuru Sato ,  Toshiaki Isogawa ,  Toshizumi Ando ,  Shingo Nakata

发明人： Mitsuru Sato ,  Toshiaki Isogawa ,  Toshizumi Ando ,  Shingo Nakata

IPC分类号： H04N5/208

CPC分类号： H04N5/208

摘要： According to the present invention, in an image enhancer, an output of an outline extracting circuit is transmitted through a band limiting filter for suppressing bands other than an objective frequency band to be enhanced and, thereafter, it is supplied to a noise slicing circuit for eliminating micro amplitude noises. The noises near the cut-off frequency of the filter can be more effectively suppressed and the deterioration of the waveform characteristic of the outline enhancement signal due to the filter can be also improved.

摘要翻译： 根据本发明，在图像增强器中，轮廓提取电路的输出通过用于抑制要增强的目标频带以外的频带的频带限制滤波器来发送，然后提供给噪声限制电路 消除微振幅噪声。 可以更有效地抑制滤波器的截止频率附近的噪声，并且还可以提高由于滤波器引起的轮廓增强信号的波形特性的劣化。

公开(公告)号：US06633731B2

公开(公告)日：2003-10-14

申请号：US09883234

申请日：2001-06-19

申请人： Yusuke Nanjo ,  Toshiaki Isogawa

发明人： Yusuke Nanjo ,  Toshiaki Isogawa

IPC分类号： G03B1720

CPC分类号： G03B13/02

摘要： Provided is an electronic view finder for use in a video camera apparatus that by making the relative position between an LCD and an ocular lens unit proper can decrease the rotatory polarization characteristic and can thereby enhance the contrast of the image. When a liquid crystal image screen surface has the characteristic of Viewing-Angle that this screen surface is seen with its contrast or brightness being different according to the direction in which to see the screen surface, the center of an eye-cup opening portion (6) on the light emission side of an ocular lens unit (2) is shifted from an optical axis (3) of the ocular lens unit (2). Thereby, an observer's eye is guided to a position detached from the position corresponding to the optical axis (3) to see the liquid crystal image screen surface (1) from an oblique direction. It has been thereby arranged to enable the liquid crystal image screen surface to be observed with an excellent contrast.

摘要翻译： 提供了一种用于摄像机装置中的电子取景器，其通过使LCD和眼镜透镜单元本身之间的相对位置可以降低旋转偏振特性，从而增强图像的对比度。 当液晶图像屏幕表面具有视角的特征时，可以看到该屏幕表面的对比度或亮度根据观看屏幕表面的方向而不同，眼杯开口部分的中心（< 在眼镜片单元（ 2 ）的光出射侧的HIL> 6 ）从光轴（ 眼镜片单元（ 2 ）的 3 ）。 由此，观察者的眼睛被引导到从与光轴对应的位置（ 3 ）分离的位置，以观察液晶图像屏幕表面（ 1 ）。 由此，能够以良好的对比度观察液晶影像屏幕的表面

公开(公告)号：US5483280A

公开(公告)日：1996-01-09

申请号：US320376

申请日：1994-10-11

申请人： Yoshikazu Takahashi ,  Toshiaki Isogawa ,  Yutaka Satoh ,  Shuji Shimizu

发明人： Yoshikazu Takahashi ,  Toshiaki Isogawa ,  Yutaka Satoh ,  Shuji Shimizu

IPC分类号： H04N5/235 ,  H04N5/238

CPC分类号： H04N5/2352 ,  H04N5/238

摘要： A light amount control apparatus including an iris (2) for adjusting an amount of a light from a lens (1) and supplying the adjusted light amount to a CCD element (3), an iris driving unit (9) for driving the iris (2), an iris position detecting unit (10) for detecting an aperture value of the iris (2), a shutter driving unit (8), and a microcomputer (11) for controlling the iris (2) through the shutter driving unit (8) and the iris driving unit (9). The aperture value of the iris (2) can be prevented from being increased after the position of the iris (2) detected by the iris position detecting unit (10) is located a little ahead of the position at which a diffraction phenomenon occurs. After the iris position detecting unit is located a little ahead of the position at which the diffraction phenomenon occurs, the aperture value of the iris (2) can be prevented from being increased. Therefore, when the cameraman takes a picture of bright scene, for example, even if the iris is closed considerably, the diffraction phenomenon can be prevented and a satisfactory shooting can be effected.

摘要翻译： 一种光量控制装置，包括用于调节来自透镜（1）的光量并将调整后的光量提供给CCD元件（3）的光圈（2），用于驱动光圈的光圈驱动单元（9） 2），用于检测光圈（2）的光圈值的光圈位置检测单元（10），快门驱动单元（8）和用于通过快门驱动单元（2）控制光圈（2）的微计算机（11） 8）和虹膜驱动单元（9）。 在由虹膜位置检测单元（10）检测到的虹膜（2）的位置位于发生衍射现象的位置之前可以防止虹膜（2）的孔径值增加。 在虹膜位置检测单元位于发生衍射现象的位置之前的一点处，可以防止虹膜（2）的孔径值增加。 因此，摄像师拍摄明亮场景时，即使光圈相当闭合，也能够防止衍射现象，能够进行令人满意的拍摄。

公开(公告)号：US06466196B1

公开(公告)日：2002-10-15

申请号：US09472294

申请日：1999-12-27

申请人： Toshiaki Isogawa ,  Kazuo Hashimoto ,  Toshitake Terada

发明人： Toshiaki Isogawa ,  Kazuo Hashimoto ,  Toshitake Terada

IPC分类号： G09G336

CPC分类号： H05B41/2824 ,  G09G3/3406 ,  G09G2320/0606 ,  G09G2320/0626 ,  G09G2320/064 ,  H05B41/3927

摘要： In an apparatus equipped with a display panel having displayed thereon an image of a video signal input thereto and a backlight for use for the display panel, there are provided a level-setting means (19) for outputting a signal having a level corresponding to the adjusting level of brightness of the image displayed on the display panel, a thinning means (20) for thinning a signal having a periodic waveform at every pseudo random period that has been set in correspondence with an output level of the level-setting means (19), and a drive means (13), (Q1) for generating a drive signal for driving the backlight based on an output signal of the thinning means (20). With this construction, it is arranged to enable the maintenance of an excellent state of display of the image and to enable the adjustment of the brightness of the backlight to be performed over a wide range without generating any noises.

摘要翻译： 在配备有在其上显示有输入的视频信号的图像的显示面板和用于显示面板的背光的装置中，设置有电平设定装置（19），用于输出具有对应于 调整在显示面板上显示的图像的亮度水平，减薄装置（20），用于在已经根据电平设定装置（19）的输出电平设置的每个伪随机周期中稀疏具有周期性波形的信号 ）和驱动装置（13），（Q1），用于基于所述稀疏装置（20）的输出信号产生用于驱动背光的驱动信号。 利用这种结构，能够保持良好的图像显示状态，能够在不产生任何噪声的情况下，在宽范围内进行背光源的亮度的调整。

公开(公告)号：US5689676A

公开(公告)日：1997-11-18

申请号：US746878

申请日：1996-11-18

申请人： Harumi Hirose ,  Toshizumi Ando ,  Yoshiki Takekawa ,  Toshiaki Isogawa ,  Shingo Nakata

发明人： Harumi Hirose ,  Toshizumi Ando ,  Yoshiki Takekawa ,  Toshiaki Isogawa ,  Shingo Nakata

IPC分类号： G11C16/10 ,  G11C16/34 ,  G06F12/02

CPC分类号： G11C16/105 ,  G11C16/102 ,  G11C16/349 ,  G11C16/3495

摘要： A storage device incorporating an electrically erasable read only memory (EEPROM) or other data storage device having a limited number of total times of rewriting, has its useful like extended by the method of storing a pointer corresponding to the capacity of the memory, which pointer identifies a start position in the data storage device at which rewriting is to occur, and incrementing the pointer sequentially with each writing of the data storage device. The method and associated apparatus may be used to maintain a record of on-time of electronic apparatus, and/or to maintain data for correcting the white balance of a video camera under various light conditions.

摘要翻译： 包含电可擦除只读存储器（EEPROM）或其他具有有限数量的重写次数的数据存储设备的存储设备通过存储与存储器的容量相对应的指针的方法来扩展，这是有用的，哪个指针 识别要进行重写的数据存储装置中的开始位置，并且在数据存储装置的每次写入时依次递增指针。 该方法和相关装置可以用于维护电子设备的准时记录，和/或维护用于在各种光条件下校正摄像机的白平衡的数据。