JP2012228451A5

JP2012228451A5 -

Info

Publication number: JP2012228451A5
Application number: JP2011099851A
Authority: JP
Filing date: 2011-04-27
Publication date: 2014-06-05
Anticipated expiration: 2031-04-27

Description

本発明の一態様にかかる電子内視鏡装置は、内視鏡挿入部の先端部に設けられた撮像素子と、前記先端部の第１の温度を検出する第１の温度検出部と、前記内視鏡挿入部の基端が接続される本体部に設けられ、前記撮像素子から出力される画像信号から信号成分を取り出すための相関二重サンプリング部と、前記先端部と前記本体部の間で電気信号を伝送するケーブルと、前記本体部に設けられ、前記相関二重サンプリング部を動作させるためのサンプルホールド信号及び前記撮像素子を駆動するための駆動パルス信号を発生するタイミング発生部と、前記第１の温度検出部により検出された前記第１の温度に基づいて、前記タイミング発生部が発生する前記サンプルホールド信号あるいは前記駆動パルス信号のタイミングを調整するタイミング調整部と、を備え、前記タイミング調整部は、前記タイミングを補正する補正値を記憶するテーブルを参照して、前記テーブルから読み出された前記第１の温度に対応する補正値を用いて、前記サンプルホールド信号あるいは前記駆動パルス信号のタイミングを調整することを特徴とする。 An electronic endoscope apparatus according to an aspect of the present invention includes an imaging element provided at a distal end portion of an endoscope insertion portion, a first temperature detection portion that detects a first temperature of the distal end portion, A correlated double sampling unit for extracting a signal component from an image signal output from the image sensor, provided between the proximal end of the endoscope insertion unit and the distal end unit and the main body unit. And a timing generator for generating a sample hold signal for operating the correlated double sampling unit and a driving pulse signal for driving the imaging device, provided in the main body unit, and a cable for transmitting an electrical signal at A timing for adjusting the timing of the sample hold signal or the drive pulse signal generated by the timing generator based on the first temperature detected by the first temperature detector. Comprising a grayed adjusting portion, wherein the timing adjusting section refers to a table that stores a correction value for correcting the timing, using a correction value corresponding to the first temperature read out from the table The timing of the sample hold signal or the drive pulse signal is adjusted.

Claims

An image sensor provided at the distal end of the endoscope insertion portion;
A first temperature detector for detecting a first temperature of the tip;
A correlated double sampling unit provided in a main body unit to which a proximal end of the endoscope insertion unit is connected, for extracting a signal component from an image signal output from the imaging device;
A cable for transmitting an electrical signal between the tip and the main body,
A timing generator for generating a sample hold signal for operating the correlated double sampling unit and a driving pulse signal for driving the imaging device, provided in the main body unit;
A timing adjustment unit that adjusts the timing of the sample hold signal or the drive pulse signal generated by the timing generation unit based on the first temperature detected by the first temperature detection unit ;
The timing adjustment unit refers to a table storing a correction value for correcting the timing, and uses the correction value corresponding to the first temperature read from the table, and uses the sample hold signal or the drive An electronic endoscope apparatus characterized by adjusting a timing of a pulse signal .

A second temperature detector for detecting a second temperature of the main body;
The timing adjustment unit adjusts the timing of the sample hold signal or the drive pulse signal generated by the timing generation unit based on the first and second temperatures. Electronic endoscope device.

The electronic endoscope apparatus according to claim 1, wherein the timing adjustment unit adjusts the timing of the sample and hold signal by changing a phase or a pulse width of the sample and hold signal.

The electronic endoscope apparatus according to claim 1, wherein the timing adjustment unit adjusts the timing of the drive pulse signal by changing a phase of the drive pulse signal.

The timing adjustment unit adjusts the timing of the sample and hold signal by changing the phase or pulse width of the sample and hold signal, and changes the timing of the driving pulse signal and the phase of the driving pulse signal. The electronic endoscope apparatus according to claim 1, wherein the electronic endoscope apparatus is adjusted by the adjustment.

An analog-digital conversion unit that converts the image signal of the analog signal output from the correlated double sampling unit into a digital signal;
The electronic endoscope apparatus according to claim 1, wherein the timing adjustment unit also adjusts a timing of a conversion timing signal input to the analog-digital conversion unit.

The timing adjustment unit refers to a table storing a correction value for correcting the timing, and uses a correction value corresponding to a combination of the first temperature and the second temperature read from the table. The electronic endoscope apparatus according to claim 2, wherein the timing of the sample hold signal or the drive pulse signal is adjusted.

The electronic endoscope apparatus according to any one of claims 1 to 7, characterized in that it has a temperature display unit to display the first temperature.

Provided in the distal portion, the electronic endoscope according to any one of claims 1 to 8, characterized in that it comprises a waveform shaping circuit for shaping the waveform of the drive pulse signal supplied to the image sensor apparatus.

The electronic endoscope apparatus according to any one of claims 1 to 9 , wherein timing adjustment of the sample hold signal or the drive pulse signal is performed during a blanking period of an image.