Patent ID: 8696555
Filing Date: 2014-04-15
Classification: A61B,H04N

Abstract:
1. A light source device comprising: a light source; a diaphragm member for adjusting light quantity of illumination light supplied from the light source; and a diaphragm driving part for driving the diaphragm member to perform opening operation or closing operation; an opening/closing control part for setting electric energy to be supplied to the diaphragm driving part and controlling an opening/closing amount of the diaphragm member; a control range setting part for detecting fixed position information at a time the diaphragm member is fixed at a predetermined position, setting adjustment data for adjusting a drive signal outputted from the opening/closing control part and opening/closing positions of the diaphragm member based on the fixed position information, and regulating a control range of the opening/closing control part based on the adjustment data, wherein the predetermined position can be one of a fully-opened position and a fully-closed position of the diaphragm member; and a stopper member fixed to a base to which the diaphragm driving part is fixed and configured to restrict a rotation range of the diaphragm member is provided at the fully-opened position and the fully-closed position, wherein a voltage control range of the diaphragm driving part is set to be wider than a maximum rotation range of the diaphragm member restricted by the stopper member, and wherein the control range setting part causes the diaphragm member to be moved with an electric energy that can move the diaphragm member beyond a rotation range restricted by the stopper member on the fully-opened position, and stopped by the stopper member at the fully-opened position, detects the fixed position information on the fully-opened position based on position detection information showing the position of the diaphragm member when the diaphragm member is stopped by the stopper member, and sets the fixed position information as control range limit values of the fully-opened position of the opening/closing control part, or, the control range setting part causes the diaphragm member to be moved with an electric energy that can move the diaphragm member beyond a rotation range restricted by the stopper member on the fully-closed position, and stopped by the stopper member at the fully-closed position, detects the fixed position information on the fully-closed position based on position detection information showing the position of the diaphragm member when the diaphragm member is stopped by the stopper member, and sets the fixed position information as control range limit values of the fully-closed position of the opening/closing control part.