US 2013/0154509 A1Published application

Light source apparatus

AssigneeOlympus Medical Systems Corp.

InventorYusuke YABE

Life of this patent

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Abstract

A light source apparatus has a lighting time period measuring section measuring lighting time periods of respective LEDs, a junction temperature calculating section that calculates junction temperatures of the respective LEDs, a light intensity deterioration characteristic storing section storing light intensity deterioration characteristics based on the junction temperatures of the respective LEDs, a light source drive characteristic storing section storing characteristics of power that drives the respective LEDs and light intensities, a deteriorated light intensity calculating section calculating deteriorated light intensities based on the measured lighting time periods, the calculated junction temperatures, and the light intensity deterioration characteristics stored in the light intensity deterioration characteristic storing section, and a light source power control section controlling power that drives the light sources, based on the deteriorated light intensities calculated by the deteriorated light intensity calculating section, and the characteristics stored in the light source drive characteristic storing section.

Claims2

Dependent claims

A light source apparatus configured by a light source having a semiconductor device, a light intensity of which deteriorates with a lighting time period, comprising:

a lighting time period measuring section that measures a lighting time period of the light source;
a junction temperature calculating section that calculates a junction temperature of the light source;
a light intensity deterioration characteristic storing section that stores a light intensity deterioration characteristic based on the junction temperature of the light source;
a light source drive characteristic storing section that stores characteristics of power that drives the light source and a light intensity;
a deteriorated light intensity calculating section that calculates a deteriorated light intensity based on the lighting time period measured by the lighting time period measuring section, the junction temperature calculated by the junction temperature calculating section, and the light intensity deterioration characteristic stored in the light intensity deterioration characteristic storing section;
and
a light source power control section that controls power that drives the light source, based on the deteriorated light intensity calculated by the deteriorated light intensity calculating section, and the characteristics stored in the light source drive characteristic storing section.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/685,240Filed 26 Nov 2012
Priority: JP 2011-11819826 May 2011
Published: 20 Jun 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H05B 47/10
Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant: controlling the light source
A61B 1/00006
Characterised by electronic signal processing: of control signals
A61B 1/00057
Operational features of endoscopes: provided with means for testing or calibration
A61B 1/0638
With illuminating arrangements: providing two or more wavelengths

Family

Application13/685,240Continuation
US 8,659,242 B2Related patent
US 2013/0154509 A1This patent

From the US filing history. Foreign family members aren’t listed.

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