Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LIGHT-EMITTING DEVICE AND DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2005063687
Kind Code:
A
Abstract:

To provide a light-emitting device and a display device capable of effectively exerting a biological rhythm control function by utilizing a light-emitting body for emitting light having a wavelength of 445 to 480 nm as a blue light source which has an influence on biological rhythm at all times when lighted.

The light-emitting device has a plurality of red light-emitting LEDs 103, green light-emitting LEDs 104, LEDs 105 emitting blue light having a peak wavelength of 470 nm, and LEDs 106 emitting blue light having a peak wavelength shorter than that of the LED 105. The LED 105 emits blue light which exerts influence on the biological rhythm by a melatonin restriction effect. The LED 106 emits the light with a weak melatonin restriction effect, having a wavelength shorter than that of the LED 105. The light-emitting device can effectively control the biological rhythm by a control circuit 107 for switching the lighting of LEDs 106 and the LEDs 105 depending on circumstances.


Inventors:
WAKABAYASHI YASUTAKA
IWAUCHI KENICHI
Application Number:
JP2003000207172
Publication Date:
March 10, 2005
Filing Date:
August 11, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SHARP KK
International Classes:
G04G11/00; A61M21/00; A61N5/06; G09F9/30; G09F9/33; G09F13/00; G09F13/20; G09F13/22; H01L27/32; H01L51/50; H05B33/14; H05B37/02; (IPC1-7): H05B37/02; A61M21/00; A61N5/06; G04G11/00; G09F9/30; G09F9/33; G09F13/00; G09F13/20; G09F13/22; H05B33/14
Attorney, Agent or Firm:
原 謙三
木島 隆一
金子 一郎