PHOTOSYNTHESIS INHIBITING LIGHT SOURCE AND ILLUMINATING DEVICE THAT USES THE SAME

• US 20100232135A1
• Filed: 11/21/2008
• Published: 09/16/2010
• Est. Priority Date: 11/23/2007
• Status: Abandoned Application

• Current Assignee: Nagayama Electronic Industry Co., Ltd.
• Original Assignee: Nagayama Electronic Industry Co., Ltd.
• Inventors: Kazunori, Nagayama, Munehiro, Kawamura, Yuji, Ano, Kazumasa, Yoshimura
• Application Number:
  US12/734,769
• Publication Number:
  US 20100232135A1
• Time in Patent Office: Days
• US Class Current: 362/84
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/48257 connecting the wire to a die pad of the item
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials

Abstract

A photosynthesis inhibiting light source that emits substantially white light that does not exert an adverse influence on the human body while inhibiting/stunting the growth and propagation of photosynthetic organisms. photosynthesis inhibiting light source includes a semiconductor layer that emits near-ultraviolet light and at least one kind of fluorescent substance that emits light by being excited by the near-ultraviolet light. The near-ultraviolet light includes ultraviolet light having a light emission band in wavelengths of 300 to 380 nm and violet light having a light emission band in wavelengths of 380 to 400 nm. The mixed light of the near-ultraviolet light and light emitted by the at least one kind of fluorescent substance is substantially white.

Claims

1. A photosynthesis inhibiting light source comprising:

a semiconductor layer that emits near-ultraviolet light and a fluorescent substance that emits green light by being excited by the near-ultraviolet light, the green light having a light emission peak in wavelengths of 550 to 570 nm and hardly contributing to photosynthesis,

wherein the near-ultraviolet light includes ultraviolet light having a light emission band between a wavelength of 300 and a wavelength of 380 nm that hardly contributing to photosynthesis and violet light having a light emission band between a wavelength of 380 and a wavelength of 400 nm that hardly contributing to photosynthesis,

wherein substantially white light is made by mixing the near-ultraviolet light and the green light together, and

wherein the substantially white light does not include red light having a light emission peak in wavelengths of 640 to 680 nm.

4. The photosynthesis inhibiting light source according to claim 1, wherein the fluorescent substances are a fluorescent substance that has a light emission peak in wavelengths of 430 to 490 nm and that emits blue light and a fluorescent substance that has a light emission peak in wavelengths of 570 to 600 nm and that emits yellow light, respectively.

5. A photosynthesis inhibiting illuminating device comprising at least one photosynthesis inhibiting light source according to claim 1.

6. The photosynthesis inhibiting illuminating device according to claim 5, characterized by further comprising an optical diffuser disposed on a side toward which light of the photosynthesis inhibiting light source is emitted.

7. The photosynthesis inhibiting illuminating device according to claim 6, characterized in that the fluorescent substance is contained in or is allowed to adhere to the optical diffuser.

2. (canceled)

3. (canceled)