Light emitting device

Abstract

A light emitting device includes a light emitting element adapted to emit blue light, quantum dots that absorb part of the blue light emitted from the light emitting element to emit green light, and at least one of a KSF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light and a MGF phosphor adapted to absorb part of the blue light emitted from the light emitting element to emit red light.

What is claimed is: 
     
         1 . A light emitting device, comprising:
 a light emitting element;   a light guide plate in which light from the light emitting element enters; and   a sheet-shaped or film-shaped light-transmissive material disposed facing an upper surface of the light guide plate and including green quantum dots adapted to absorb a portion of blue light emitted from the light emitting element to emit green light.   
     
     
         2 . The light emitting device according to  claim 1 ,
 wherein the light-transmissive material is organic polymers.   
     
     
         3 . The light emitting device according to  claim 1 ,
 wherein the light-transmissive material is polymethyl methacrylate resin.   
     
     
         4 . The light emitting device according to  claim 1 ,
 wherein the green quantum dots emit green light having a wavelength of a emission peak of 510 to 560 nm.   
     
     
         5 . The light emitting device according to  claim 1 ,
 wherein the green quantum dots have a half-width of an emission peak of 40 nm or less.   
     
     
         6 . The light emitting device according to  claim 1 ,
 wherein the green quantum dots have a particle size of 1 to 20 nm.   
     
     
         7 . The light emitting device according to  claim 1 ,
 wherein a reflecting plate is placed on a lower side of the light guide plate.   
     
     
         8 . The light emitting device according to  claim 1 ,
 wherein the light-transmissive material is in contact with the light guide plate.   
     
     
         9 . The light emitting device according to  claim 1 ,
 wherein the light-transmissive material is spaced apart from the light guide plate.   
     
     
         10 . A liquid crystal display device, comprising:
 the light emitting device according to  claim 1 ; and a liquid crystal cell.