LIGHT SOURCE AND LIGHT IRRADIATING DEVICE

• US 20100060195A1
• Filed: 11/29/2007
• Published: 03/11/2010
• Est. Priority Date: 12/08/2006
• Status: Abandoned Application

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Uchiumi, Tadashi, Kaneko, Takashi, Tsuboi, Masanori, Yamanaka, Atsushi
• Application Number:
  US12/515,672
• Publication Number:
  US 20100060195A1
• Time in Patent Office: Days
• US Class Current: 315/294
• CPC Class Codes: A61M 2021/0044 by the sight sense
• CPC Class Codes: A61M 21/00 Other devices or methods to cause a change in the state of consciousness; Devices for producing or ending sleep by mechanical, optical, or acoustical means, e.g. for hypnosis
• CPC Class Codes: A61N 2005/0642 Irradiating part of the body at a certain distance
• CPC Class Codes: A61N 2005/0662 Visible light
• CPC Class Codes: A61N 2005/0663 Coloured light
• CPC Class Codes: A61N 5/0618 Psychological treatment
• CPC Class Codes: F21S 6/002 Table lamps, e.g. for ambient lighting
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21Y 2113/10 of different colours
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

A light source and a light irradiating device are provided to efficiently regulate a biological rhythm of a user without changing a color temperature of illumination light, an average color-matching index (Ra) or both. The light irradiating device is comprised of a blue emitter (11) that emits light with major energy in a wavelength region adjacent to a wavelength to minimize a value of M(λ)/z(λ), where M(λ) is a relative sensitivity in an antisecretory characteristic of melatonin and z(λ) is a relative sensitivity of a color matching function, a blue emitter (12) that emits light with major energy in a wavelength different from the wavelength of the blue emitter (11), a red emitter (13), a green emitter (14), a diffusing plate (15) that diffuses light from each emitter, a controller (16); that controls the light emission intensity of each emitter, an information input device (17) that inputs information on adjustment of the degree of biological reaction of each emitter, information on an illumination color temperature and the like, a switch (18) that can turn on or off each emitter, and a memory device (19) that stores the light emission intensity of each emitter and its adjusting methods.

Claims

1. A light source comprising:

an emitter that emits light having a large quantity of energy in a range A; and

an emitter that emits light having a large quantity of energy in a range B, wherein

the range A represents a wavelength range of 430 [nm] to 470 [nm] and the range B represents a wavelength range of 380 [nm] to 440 [nm] and that of 460 [nm] to 510 [nm].

3. A light source comprising the light source as defined in claim 1, wherein

the light source is capable of separately controlling a light emission intensity of each of emitters making up the light source.

10. A light irradiating device at least comprising:

the light source of claim 1;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

12. A light irradiating device at least comprising:

the light source of claim 3;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

2. A light source comprising:

an emitter that emits light having a peak at least in a range A; and

an emitter that emits light having a peak at least in a range B, wherein

the range A represents a wavelength range of 430 [nm] to 470 [nm] and the range B represents a wavelength range of 380 [nm] to 440 [nm] and that of 460 [nm] to 510 [nm].

11. A light irradiating device at least comprising:

the light source of claim 2;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

4. A light source at least comprising:

a blue emitter that emits light having a large quantity of energy in a wavelength range near a wavelength that makes M(λ

)/z(λ

) a minimum; and

a blue emitter that emits light having a large quantity of energy in a wavelength range other than the wavelength range, wherein

M(λ

) represents a relative sensitivity in melatonin secretion inhibition characteristics, and z(λ

) represents a relative sensitivity on a color matching function for human eyesight.

5. The light source as defined in claim 4, wherein

the light source adjusts a light emission intensity of the blue emitter to keep a chromaticity substantially constant, and adjusts a biological rhythm of a user based on melatonin secretion inhibition characteristics of light.

6. The light source as defined in claim 5, further comprising:

a red emitter that emits red light; and

a green emitter that emits green light.

7. The light source as defined in claim 6, wherein

the light source adjusts a light emission intensity of each of the blue emitter, the red emitter, and the green emitter to form white light and keep a color temperature substantially constant, and adjusts a biological rhythm of a user based on melatonin secretion inhibition characteristics of light.

8. The light source as defined in claim 7, wherein

the light source adjusts a light emission intensity of each of the blue emitter, the red emitter, and the green emitter to form white light, and keeps a general color rendering index of the white color from becoming lower than a given value.

9. The light source as defined in claim 7, wherein

the light source adjusts a light emission intensity of each of the blue emitter, the red emitter, and the green emitter to form white light, and keeps luminance substantially constant.

13. A light irradiating device at least comprising:

the light source of claim 4;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

14. A light irradiating device at least comprising:

the light source of claim 5;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

15. A light irradiating device at least comprising:

the light source of claim 6;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

16. A light irradiating device at least comprising:

the light source of claim 7;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

17. A light irradiating device at least comprising:

the light source of claim 8;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.

18. A light irradiating device at least comprising:

the light source of claim 9;

a controller that controls a light emission intensity of an emitter making up the light source; and

an information input device that inputs information on a biological effect level, a color temperature, luminance, etc., of irradiating light emitted from the light source.