×

Fluorescence-reddening membrane and red-emitting device using same

  • US 6,455,176 B2
  • Filed: 01/03/2001
  • Issued: 09/24/2002
  • Est. Priority Date: 02/09/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A flurescence-reddening membrane which comprises a light-transmittable medium and, dispersed therein, (a) a rhodamine base fluorescence pigment and (b) a fluorescence pigment which has absorptions in the blue region and induces energy transfer to and reabsorptions from the rhodamine base fluorescence pigment wherein the (b) fluorescence pigment had absorptions in the blue region at a wavelength of 520 nm or less and has an optical density OD of 1.0 or more at a wavelength in the range of 420 to 490 nm, wherein a rhodamine base fluorescence pigment and a naphthalimide base fluorescence pigment are dispersed in a light-transmittable medium.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×