Light source apparatus
US8659242B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2012 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B1/0684
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.