LIGHT EMITTING DEVICE

• US 20120098460A1
• Filed: 07/05/2010
• Published: 04/26/2012
• Est. Priority Date: 07/07/2009
• Status: Abandoned Application

• Current Assignee: CCS Corporation
• Original Assignee: CCS Corporation
• Inventors: Miyasaka, Shin, Suzuki, Hirokazu
• Application Number:
  US13/380,480
• Publication Number:
  US 20120098460A1
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: H05B 45/46 having LEDs disposed in parallel lines
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

To provide a light emitting device capable of favorably controlling a color temperature of white light and having excellent color rendering properties, the light emitting device includes: a plurality of kinds of LED elements emitting ultraviolet rays or short-wavelength visible rays of different wavelengths; a single wavelength converting member containing fluorescent substances and converting the ultraviolet rays or short-wavelength visible rays emitted from the plurality of kinds of LED elements to derive white light; and a current control part varying current values to be supplied to the plurality of kinds of LED elements.

Claims

1. A light emitting device, comprising:

a plurality of kinds of LED elements emitting ultraviolet rays or short-wavelength visible rays of different wavelengths;

a single wavelength converting member containing fluorescent substances and converting the ultraviolet rays or short-wavelength visible rays emitted from the plurality of kinds of LED elements to derive white light; and

a current control part varying current values to be supplied to the plurality of kinds of LED elements.

2. The light emitting device according to claim 1, wherein each of the LED elements has a radiation peak at a wavelength of 200 to 430 nm.

3. The light emitting device according to claim 1, wherein the plurality of kinds of LED elements are alternately arranged on the same base member.

4. The light emitting device according to claim 1, wherein the fluorescent substances include fluorescent substances emitting red light, fluorescent substances emitting green light and fluorescent substances emitting blue light.

5. The light emitting device according to claim 1 emitting white light having a color temperature varying along a black-body locus or the vicinity thereof.