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JP2010012035A5 - - Google Patents

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Publication number
JP2010012035A5
JP2010012035A5 JP2008174762A JP2008174762A JP2010012035A5 JP 2010012035 A5 JP2010012035 A5 JP 2010012035A5 JP 2008174762 A JP2008174762 A JP 2008174762A JP 2008174762 A JP2008174762 A JP 2008174762A JP 2010012035 A5 JP2010012035 A5 JP 2010012035A5
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JP
Japan
Prior art keywords
detection resistor
led illumination
illumination unit
led
endoscope apparatus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2008174762A
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Japanese (ja)
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JP2010012035A (en
JP5253018B2 (en
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Publication date
Application filed filed Critical
Priority to JP2008174762A priority Critical patent/JP5253018B2/en
Priority claimed from JP2008174762A external-priority patent/JP5253018B2/en
Publication of JP2010012035A publication Critical patent/JP2010012035A/en
Publication of JP2010012035A5 publication Critical patent/JP2010012035A5/ja
Application granted granted Critical
Publication of JP5253018B2 publication Critical patent/JP5253018B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Claims (4)

直列接続された複数のＬＥＤを備え、挿入部の先端部から被写体側を照明するためのＬＥＤ照明部と、前記挿入部の先端部に前記ＬＥＤ照明部により照明された被写体からの反射光を受光して撮像する撮像素子と、
前記ＬＥＤ照明部を構成する直列接続されたＬＥＤの個数に応じた駆動電圧を前記ＬＥＤ照明部に印加して、前記ＬＥＤを発光させる可変電圧源と、前記ＬＥＤ照明部を構成するＬＥＤを発光駆動する駆動電流を一定の電流値となるように制御する定電流駆動回路部と、を備えたＬＥＤ駆動回路と、
を備え、
前記駆動電圧は、前記ＬＥＤ照明部の発光駆動に必要な最小値に近い値に設定されていることを特徴とする内視鏡装置。 A plurality of LEDs connected in series, an LED illumination unit for illuminating the subject side from the distal end portion of the insertion portion, and reflected light from the subject illuminated by the LED illumination portion at the distal end portion of the insertion portion An image sensor for imaging,
A drive voltage corresponding to the number of LEDs connected in series constituting the LED illumination unit is applied to the LED illumination unit, and a variable voltage source for causing the LED to emit light, and an LED constituting the LED illumination unit is driven to emit light A constant current drive circuit unit for controlling the drive current to be a constant current value, an LED drive circuit comprising:
With
The endoscope apparatus according to claim 1, wherein the driving voltage is set to a value close to a minimum value necessary for light emission driving of the LED illumination unit . 前記可変電圧源は、該可変電圧源の出力電圧を検知する検知抵抗を含み、この検知抵抗により検知した電圧をフィードバック制御することで、前記検知抵抗の値に応じた所定の電圧を出力するものであることを特徴とする請求項１に記載の内視鏡装置。 The variable voltage source includes a detection resistor that detects the output voltage of the variable voltage source, and outputs a predetermined voltage corresponding to the value of the detection resistor by feedback control of the voltage detected by the detection resistor. the endoscope apparatus according to claim 1, characterized in that. 前記検知抵抗は、ＣＰＵからの指示信号により、前記検知抵抗の抵抗値を変更可能なように構成されることを特徴とする請求項２に記載の内視鏡装置。   The endoscope apparatus according to claim 2, wherein the detection resistor is configured to be able to change a resistance value of the detection resistor according to an instruction signal from a CPU. 前記検知抵抗は、電子ボリューム、又は、複数の抵抗とスイッチ素子が使用されることを特徴とする請求項３に記載の内視鏡装置。   The endoscope apparatus according to claim 3, wherein an electronic volume or a plurality of resistors and a switch element are used as the detection resistor.
JP2008174762A 2008-07-03 2008-07-03 Endoscope device Expired - Fee Related JP5253018B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008174762A JP5253018B2 (en) 2008-07-03 2008-07-03 Endoscope device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008174762A JP5253018B2 (en) 2008-07-03 2008-07-03 Endoscope device

Publications (3)

Publication Number Publication Date
JP2010012035A JP2010012035A (en) 2010-01-21
JP2010012035A5 true JP2010012035A5 (en) 2011-08-11
JP5253018B2 JP5253018B2 (en) 2013-07-31

Family

ID=41698777

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008174762A Expired - Fee Related JP5253018B2 (en) 2008-07-03 2008-07-03 Endoscope device

Country Status (1)

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JP (1) JP5253018B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5175914B2 (en) * 2010-10-26 2013-04-03 富士フイルム株式会社 Wireless ultrasound diagnostic system
JP6257174B2 (en) * 2013-05-31 2018-01-10 オリンパス株式会社 Endoscope device
ES2967308T3 (en) * 2017-07-25 2024-04-29 Conmed Corp Endoscopic visualization system comprising an endoscope, a cable and a monitor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4774250B2 (en) * 2005-08-05 2011-09-14 オリンパス株式会社 Endoscope device
JP2007130085A (en) * 2005-11-08 2007-05-31 Olympus Corp Electronic endoscope

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