LED Device with Re-Emitting Semiconductor Construction and Coverging Optical Element

Abstract

A light source is provided comprising an LED component having an emitting surface, which may comprise: i) an LED capable of emitting light at a first wavelength; and ii) a re-emitting semiconductor construction which comprises a second potential well not located within a pn junction having an emitting surface; or which may alternately comprise a first potential well located within a pn junction and a second potential well not located within a pn junction; and which additionally comprises a converging optical element.

1 . an article comprising:
 a construction absorbing light at a first wavelength and emitting light at a longer second wavelength and comprising a first potential well and an emitting surface; and   an optical element extracting light that would otherwise be totally internally reflected and comprising a side and a base, the base substantially matching the emitting surface in size.   
   
   
       2 . The article of  claim 1 , wherein the construction comprises a quantum well. 
   
   
       3 . The article of  claim 1 , wherein the construction comprises a II-VI semiconductor. 
   
   
       4 . The article of  claim 1 , wherein the construction comprises a Cd(Mg)ZnSe alloy. 
   
   
       5 . The article of  claim 1 , wherein the construction further comprises an absorbing layer absorbing light at the first wavelength and transmitting light at the second wavelength. 
   
   
       6 . The article of  claim 1 , wherein the construction further comprises a support layer that is substantially transparent at the first and second wavelengths. 
   
   
       7 . The article of  claim 1 , wherein the optical element comprises at least two converging sides. 
   
   
       8 . The article of  claim 1 , wherein the optical element comprises a regular shape. 
   
   
       9 . A plurality of articles of  claim 1  arranged in an array. 
   
   
       10 . A light source comprising:
 the article of  claim 1 ; and   a second potential well emitting light at the first wavelength in response to an applied electric current.   
   
   
       11 . A backlight comprising the article of  claim 1 . 
   
   
       12 . The backlight of  claim 11  being a direct-lit backlight. 
   
   
       13 . The backlight of  claim 11  being an edge-lit backlight. 
   
   
       14 . The backlight of  claim 11  further comprising a reflective polarizer.