Light source apparatus

• US 20100157573A1
• Filed: 12/22/2009
• Published: 06/24/2010
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Electric Works Company Limited (Panasonic Holdings Corporation)
• Inventors: Toda, Naohiro, Noguchi, Hiroki, Tanaka, Kenichiro
• Granted Patent: US 8,405,299 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A light source apparatus includes a first light emitter, a second light emitter, and a third light emitter. The first light emitter has a peak wavelength within the range from 600 nm to 660 nm and a wavelength range at half peak intensity wider than the range from 600 nm to 660 nm, the second light emitter has a peak wavelength within the range from 530 nm to 570 nm and a wavelength range at half peak intensity wider than the range from 530 nm to 570 nm, and the third light emitter which a peak wavelength is 420 nm-470 nm in a spectral power distribution thereof.

Claims

1. A light source apparatus comprising:

a first light emitter having a peak wavelength within the range from 600 nm to 660 nm and a wavelength range at half peak intensity wider than the range from 600 nm to 660 nm;

a second light emitter having a peak wavelength within the range from 530 nm to 570 nm and a wavelength range at half peak intensity wider than the range from 530 nm to 570 nm;

a third light emitter which a peak wavelength is 420 nm-470 nm in a spectral power distribution thereof.

2. The light source apparatus of claim 1, wherein each of the first and second light emitter includes a light emitting diode serving as a light source having a peak wavelength below 530 nm, and a visible light component below 480 nm of the first light emitter is substantially zero.

3. The light source apparatus of claim 1, wherein a visible light component below 480 nm of the second light emitter is substantially zero.

4. The light source apparatus of claim 2, wherein a visible light component below 480 nm of the second light emitter is substantially zero.

5. The light source apparatus of claim 1, wherein each of the first and the second light emitter includes a light source having a peak wavelength below 530 nm and a color converting member provided near the light source.

6. The light source apparatus of claim 5, wherein the light source is a light emitting diode and the light emitting diode is covered by a resin made of a color converting material containing a component absorbing a visible light component below 480 nm.

7. The light source apparatus of claim 5, wherein the color converting member includes an optical multi-layered film or a fluorescent material.

8. The light source apparatus of claim 5, wherein each of the first and the second emitter further includes a lens provided on the color converting member, the lens including a short wavelength cutoff filter which cuts off a visible light component below 480 nm.