US 2024/0206030 A1 · A LIGHT OUTPUT SYSTEM AND DESIGN METHOD

Abstract

The invention provides a light output system for delivering light to a region of interest, for providing at least a minimum light intensity to all of the region of interest. The system has more light sources of a particular kind than are needed to reach the minimum light intensity (to all of the region of interest), and they are operated with a duty cycle. The duty cycle ratio is reduced by a factor which is greater than the factor by which the number of light sources in increased above the minimum number, so that energy savings are obtained as well as an increased lifetime of the system.

Claims15

Dependent claims

A light output system for delivering light to a region of interest, for providing at least a minimum light intensity to all of the region of interest, characterized in that the system comprises:

a first number of light sources each delivering a respective operational light output flux, wherein a second number of said light sources, less than the first number of light sources, operated at said operational light output flux and at 100% duty cycle, would be sufficient to provide said minimum light intensity to all of the region of interest, and the first number is a multiple α of the second number;
and
a controller for operating each one of the first number of light sources with a duty cycle during a light output period, thereby to reduce a lowest light intensity provided within the region of interest towards the minimum light intensity, wherein the duty cycle ratio β is less than 1/α.

Dependencies are inferred from the claim text.

A light output system and design method

Life of this patent

A light output system and design method

Life of this patent

Abstract

Claims15