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    • 2. 发明授权
    • Endoscopic imaging system and endoscope system
    • 内窥镜成像系统和内窥镜系统
    • US07355625B1
    • 2008-04-08
    • US09523332
    • 2000-03-10
    • Akihiko MochidaKatsuyuki SaitoHideki TashiroKotaro OgasawaraMakoto TsunakawaNoboru Kusamura
    • Akihiko MochidaKatsuyuki SaitoHideki TashiroKotaro OgasawaraMakoto TsunakawaNoboru Kusamura
    • H04N7/18
    • H04N7/183A61B1/042H04N5/232H04N2005/2255
    • An imaging apparatus having an imaging device for imaging an object in cooperation with an endoscope is connected to a video processing unit for producing a standard video signal so that it can be disconnected freely. A signal delay occurs over a signal line linking the imaging device and the video processing unit. For this reason, a timing generator and a phase adjustment circuit are incorporated in the imaging apparatus. The timing generator generates driving signals used to drive the imaging device, and the phase adjustment circuit adjusts the phases of the driving signals so that an output signal of the imaging device will be input to the video processing unit according to predetermined timing. Even when the signal line has a different length from any other or the imaging device offers a different number of pixels from any other, the difference can be readily coped with owing to the imaging apparatus. This leads to alleviation of a load incurred by the video processing unit.
    • 具有用于与内窥镜协作的物体成像的成像装置的成像装置连接到用于产生标准视频信号的视频处理单元,使得其可以自由地断开。 在连接成像设备和视频处理单元的信号线上发生信号延迟。 因此,定时发生器和相位调整电路并入成像装置。 定时发生器产生用于驱动成像装置的驱动信号,并且相位调整电路调节驱动信号的相位,使得成像装置的输出信号将根据预定定时输入到视频处理单元。 即使当信号线与任何其它信号线具有不同的长度或成像装置提供与任何其他像素不同数量的像素时,由于成像装置也可以容易地应对差异。 这导致减轻由视频处理单元产生的负担。
    • 4. 发明授权
    • Endoscopic apparatus
    • 内窥镜装置
    • US06456317B1
    • 2002-09-24
    • US09198850
    • 1998-11-24
    • Kanichi MatsumotoKatsuyuki SaitoMakoto TsunakawaAkihiko MochidaKotaro OgasawaraShinji YamashitaNoboru KusamuraWataru OhnoKuniaki KamiHideki Tashiro
    • Kanichi MatsumotoKatsuyuki SaitoMakoto TsunakawaAkihiko MochidaKotaro OgasawaraShinji YamashitaNoboru KusamuraWataru OhnoKuniaki KamiHideki Tashiro
    • H04N318
    • H04N5/2354H04N5/2352H04N9/045H04N2005/2255
    • In an endoscopic apparatus, when the dynamic range expansion on/off switch is turned on, a CPU changes a switch from one contact over to another. Red, green, and blue digital signals sent from a knee and gamma circuit are output to respective dynamic range expanding circuits. Thus, the dynamic ranges for the digital signals are expanded. On the other hand, when the CPU changes another switch from one contact over to the other, a light adjustment signal output from an operational amplifier is then driven to a level causing a diaphragm in a light source unit to open further. Consequently, an increased amount of illumination light is supplied to the incident end of a light guide running through an endoscope. Thus, when a dynamic range is expanded, a halation effect will not occur in imaging of an object located at a point near the distal end of the endoscope. Moreover, insufficiency of illumination light will not occur in the imaging of an object located at a point far from the endoscope distal end. The dynamic range can therefore be expanded efficiently. An endoscopic image of the interior of a body cavity can be viewed with the body cavity set to a desired brightness level all points ranging from a near point to a far point within the body cavity.
    • 在内窥镜装置中,当动态范围扩大开/关开关打开时,CPU将开关从一个触点切换到另一个触点。 从膝盖和伽马电路发送的红色,绿色和蓝色数字信号被输出到相应的动态范围扩展电路。 因此,扩展了数字信号的动态范围。 另一方面,当CPU将另一个开关从一个触点切换到另一个触点时,从运算放大器输出的调光信号被驱动到导致光源单元中的隔膜进一步打开的水平。 因此,向穿过内窥镜的导光体的入射端供给增加量的照明光。 因此,当动态范围扩大时,在位于内窥镜远端附近的物体的成像中不会发生晕影效果。 此外,在位于远离内窥镜远端的点的物体的成像中不会发生照明光的不足。 因此可以有效地扩展动态范围。 体腔内部的内窥镜图像可以被观察到,其体腔被设置为期望的亮度级别,其范围从体腔内的近点到远点。
    • 5. 发明授权
    • Image pickup system
    • 摄像系统
    • US07821529B2
    • 2010-10-26
    • US10670114
    • 2003-09-24
    • Akihiko MochidaKatsuyuki SaitoMakoto TsunakawaNoboru KusamuraKotaro OgasawaraHideki Tashiro
    • Akihiko MochidaKatsuyuki SaitoMakoto TsunakawaNoboru KusamuraKotaro OgasawaraHideki Tashiro
    • A62B1/04
    • H04N5/335A61B1/05H04N2005/2255
    • To provide an image pickup system having CCDs 25 driven at different frequencies respectively which can drive each CCD 25 with a predetermined frequency if a detachable camera head (or electronic endoscope) 28 is used and also can process a signal processing clock of a video processing circuit 29 with one type of clock. A drive signal of the predetermined frequency supplied to the CCD is produced via a generating circuit CXO 155 in the video processing circuit 29, a frequency dividing circuit 132 and a timing generator (T.G.) 131. A CCD signal outputted from the CCD 25 is inputted to a line memory 139 in a floating circuit 135. As a writing clock (WCK) of the line memory 139, the one which is divided in the frequency dividing circuit 132 to a frequency in accordance with the CCD 25 to be used is used, and as a reading clock (RCK), the one of one type of frequency is used without regard to the CCD 25 to be used. Hence, it is possible to perform the signal processing of a secondary circuit 136 of the line memory 139 and following ones always with a common generating clock.
    • 为了提供具有以不同频率驱动的CCD25的图像拾取系统,其可以使用可拆卸的相机头(或电子内窥镜)28来以预定频率驱动每个CCD 25,并且还可以处理视频处理电路的信号处理时钟 29与一种类型的时钟。 通过视频处理电路29,分频电路132和定时发生器(TG)131中的发生电路CX0 155产生提供给CCD的预定频率的驱动信号。输入从CCD 25输出的CCD信号 作为浮置电路135中的行存储器139.作为行存储器139的写入时钟(WCK),使用在分频电路132中划分为与要使用的CCD 25相对应的频率的存储器, 并且作为读取时钟(RCK),使用一种类型的频率中的一种,而不考虑要使用的CCD 25。 因此,可以对行存储器139的次级电路136进行信号处理,并且可以执行以下公式的公共生成时钟。