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Title:
PICKUP SYSTEM
Document Type and Number:
WIPO Patent Application WO/2003/077560
Kind Code:
A1
Abstract:
A pickup system includes CCD (25) driven by different frequencies. Each of the CCD (25) can be driven with a predetermined frequency even by using an attachable&sol detachable camera head (or an electronic endoscopy). Furthermore, a signal processing clock of a video processing circuit (29) can be processed by one type of clock. The drive signal of the predetermined frequency supplied to the CCD is generated via an oscillation circuit CXO (155), a frequency divider circuit (132), and a timing generator (T.G) (131) in the video processing circuit (29). A CCD signal output from the CCD (25) is supplied to a line memory (139) in a floating circuit (135). The write−in clock (WCK) of the line memory (139) used has been divided into a frequency corresponding to the CCD 25 used in the frequency divider circuit (132). The read−out clock (RCK) of one frequency is used regardless of the CCD (25) used. Thus, signal processing in a secondary circuit (136) after the line memory (139) can always be processed by a common oscillation clock.

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Inventors:
MOCHIDA AKIHIKO (JP)
SAITO KATSUYUKI (JP)
TSUNAKAWA MAKOTO (JP)
KUSAMURA NOBORU (JP)
OGASAWARA KOTARO (JP)
TASHIRO HIDEKI (JP)
Application Number:
PCT/JP2002/002400
Publication Date:
September 18, 2003
Filing Date:
March 14, 2002
Export Citation:
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Assignee:
OLYMPUS OPTICAL CO (JP)
MOCHIDA AKIHIKO (JP)
SAITO KATSUYUKI (JP)
TSUNAKAWA MAKOTO (JP)
KUSAMURA NOBORU (JP)
OGASAWARA KOTARO (JP)
TASHIRO HIDEKI (JP)
International Classes:
A61B1/04; A62B1/04; G02B23/24; H04N5/225; H04N5/232; H04N7/18; A61B1/05; (IPC1-7): H04N7/18; H04N5/225; H04N5/232
Foreign References:
JPH1147087A1999-02-23
JPH04186988A1992-07-03
JPH0678212A1994-03-18
JPH04313984A1992-11-05
US5614943A1997-03-25
US5541651A1996-07-30
EP0984628A12000-03-08
Other References:
See also references of EP 1492350A4
Attorney, Agent or Firm:
Itoh, Susumu (Nishishinjuku 7-chome Shinjuku-ku, Tokyo, JP)
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