Backlight module and display device

Abstract

A backlight module and a display device are disclosed, and the backlight module includes: a light source component, a wavelength selection film, and a first light emitting film laminated in sequence. The light source component is configured to emit light of a first wavelength range, the wavelength selection film transmits the light of the first wavelength range and reflect at least light of a second wavelength range, the second wavelength range does not coincide with the first wavelength range, and the first light emitting film is configured to excite and emit blue light under an illumination of the light of the first wavelength range.

1 - 20 . (canceled) 
     
     
         21 : A backlight module, comprising:
 a light source component, a wavelength selection film, and a first light emitting film laminated in sequence,   wherein the light source component is configured to emit at least light of a first wavelength range, the wavelength selection film is configured to transmit the light of the first wavelength range and reflect at least light of a second wavelength range, the second wavelength range does not coincide with the first wavelength range, and the first light emitting film is configured to excite and emit blue light under an illumination of the light of the first wavelength range.   
     
     
         22 : The backlight module of  claim 21 , wherein the light source component is a near-infrared light source component, and the first wavelength range is a near-infrared wavelength range. 
     
     
         23 : The backlight module of  claim 22 , wherein the first wavelength range is a range of 970 to 980 nm. 
     
     
         24 : The backlight module of  claim 21 , wherein the first light emitting film is an up-conversion light emitting film comprising up-conversion light emitting particles and a transparent polymer material. 
     
     
         25 : The backlight module of  claim 24 , wherein a material of the up-conversion light emitting particles comprises NaYF4 nanoparticles doped at a mass ratio of Yb:Tm of 20%:0.5%, and the transparent polymer material is polymethyl methacrylate. 
     
     
         26 : The backlight module of  claim 24 , wherein the up-conversion light emitting particles have a particle size of 10 to 30 nm.