US2013181603A1PendingUtilityA1

Light-Emitting Diode (LED) Devices Comprising Nanocrystals

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Assignee: NANOSYS INCPriority: Mar 19, 2007Filed: Jan 23, 2013Published: Jul 18, 2013
Est. expiryMar 19, 2027(~0.6 yrs left)· nominal 20-yr term from priority
Inventors:Robert S. DubrowJian ChenVeeral HardevH. Jurgen HoflerErnest Lee
H10H 20/0361H10H 20/8515H10H 20/8514H10H 20/8512C09K 11/565Y10S977/952H05B 33/04Y10S977/834C09K 11/025Y10T156/10G02B 6/0068Y02B20/00B32B 2457/206C09K 11/883G02B 6/0041G02B 1/02G02B 1/10Y10S977/81B82Y 20/00
59
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Claims

Abstract

The present invention provides light-emitting diode (LED) devices comprises compositions and containers of hermetically sealed luminescent nanocrystals. The present invention also provides displays comprising the LED devices. Suitably, the LED devices are white light LED devices.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A light-emitting diode (LED) device, comprising:
 (a) a blue-light emitting LED; and   (b) a hermetically sealed container comprising a plurality of luminescent nanocrystals,   
       wherein the container is placed with respect to the LED to facilitate down-conversion of the luminescent nanocrystals. 
     
     
         2 . The LED device of  claim 1 , wherein the hermetically sealed container is a plastic or glass tube. 
     
     
         3 . The LED device of  claim 1 , wherein the hermetically sealed container is a glass capillary. 
     
     
         4 . The LED device of  claim 1 , wherein the hermetically sealed container is spaced apart from the LED. 
     
     
         5 . The LED device of  claim 1 , wherein the luminescent nanocrystals emit green light and red light. 
     
     
         6 . The LED device of  claim 1 , wherein the luminescent nanocrystals comprise CdSe or ZnS. 
     
     
         7 . The LED device of  claim 1 , wherein the luminescent nanocrystals are core/shell luminescent nanocrystals comprising CdSe/ZnS, InP/ZnS, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS. 
     
     
         8 . The LED device of  claim 1 , wherein the luminescent nanocrystals are dispersed in a polymeric matrix. 
     
     
         9 . The LED device of  claim 8 , wherein the matrix comprises one or more scattering particles. 
     
     
         10 . The LED device of  claim 9 , wherein the scattering particles are metallic, polymeric, or semiconductor particles. 
     
     
         11 . The LED device of  claim 10 , wherein the scattering particles are greater than about 500 nm in size. 
     
     
         12 . A display system, comprising:
 (a) a display; and   (b) a plurality of light-emitting diode (LED) devices, the LED devices comprising:
 (i) a blue light emitting LED; and 
 (ii) a hermetically sealed container comprising a plurality of luminescent nanocrystals, wherein the container is placed with respect to the LED to facilitate down-conversion of the luminescent nanocrystals. 
   
     
     
         13 . The display system of  claim 12 , wherein the hermetically sealed container is a plastic or glass tube. 
     
     
         14 . The display system of  claim 12 , wherein the hermetically sealed container is a glass capillary. 
     
     
         15 . The display system of  claim 12 , wherein the hermetically sealed container is spaced apart from the LED. 
     
     
         16 . The display system of  claim 12 , wherein the luminescent nanocrystals emit green light and red light. 
     
     
         17 . The display system of  claim 12 , wherein the luminescent nanocrystals comprise CdSe or ZnS. 
     
     
         18 . The display system of  claim 12 , wherein the luminescent nanocrystals are core/shell luminescent nanocrystals comprising CdSe/ZnS, InP/ZnS, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS. 
     
     
         19 . The display system of  claim 12 , wherein the luminescent nanocrystals are dispersed in a polymeric matrix. 
     
     
         20 . A light-emitting diode (LED) device, comprising:
 (a) an LED;   (b) a hermetically sealed container comprising a plurality of luminescent nanocrystals optically coupled to the LED; and   (c) a light guide optically coupled to the hermetically sealed container,   
       wherein a first portion of light emitted from the LED is down-converted by the luminescent nanocrystals, and wherein a second portion of light emitted from the LED and the down-converted light from the luminescent nanocrystals are emitted from the light guide. 
     
     
         21 . A white light light-emitting diode (LED) device, comprising:
 (a) a blue light light-emitting LED;   (b) a hermetically sealed container comprising a plurality of CdSe/ZnS luminescent nanocrystals optically coupled to the LED; and   (c) a light guide optically coupled the hermetically sealed container,   
       wherein a first portion of blue light emitted from the LED is down-converted by the CdSe/ZnS luminescent nanocrystals to green light and red light, and wherein a second portion of blue light emitted from the LED, the green light and the red light, are emitted from the light guide and combine to produce white light. 
     
     
         22 . A display system, comprising:
 (a) a display;   (b) a plurality of light-emitting diode (LED) devices, the LED devices comprising:
 (i) an LED; and 
 (ii) a hermetically sealed container comprising a plurality of luminescent nanocrystals optically coupled to the LED; and 
   (c) a light guide optically coupled to the hermetically sealed container, wherein the display at least partially encloses the light guide,   
       wherein a first portion of light emitted from the LED is down-converted by the luminescent nanocrystals, and wherein a second portion of light emitted from the LED and the down-converted light from the luminescent nanocrystals are emitted from the light guide and displayed on the display. 
     
     
         23 . A light-emitting diode (LED) device, comprising:
 (a) an LED;   (b) a hermetically sealed container comprising a plurality of luminescent nanocrystals optically coupled to the LED; and   (c) a light guide optically coupled to the hermetically sealed container,   
       wherein light emitted from the LED is down-converted by the nanocrystals, and exits a surface of the light guide. 
     
     
         24 . The LED device of  claim 23 , wherein the hermetically sealed container is spaced apart from the LED. 
     
     
         25 . The LED device  claim 24 , wherein the luminescent nanocrystals are dispersed in a polymeric matrix. 
     
     
         26 . The LED device of  claim 25 , wherein the hermetically sealed container is a plastic or glass tube. 
     
     
         27 . The LED device of  claim 25 , wherein the hermetically sealed container is a glass capillary. 
     
     
         28 . The LED device of  claim 27 , wherein the matrix comprises one or more scattering particles. 
     
     
         29 . The LED device of  claim 28 , wherein the scattering particles are metallic, polymeric, or semiconductor particles.

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