Light emitting diode (led) devices

Patent metadata

Field	Value
Publication number	US-2015109814-A1
Application number	US-201414515814-A
Country	US
Kind code	A1
Filing date	Oct 16, 2014
Priority date	Oct 17, 2013
Publication date	Apr 23, 2015
Grant date	—

Abstract

Disclosed teem are display systems comprising light-emitting, diodes (LEDs), suitably blue light LEDs, which demonstrate increased optical power output. In embodiments, the display systems include compositions comprising phosphors, including luminescent nanocrystals.

First claim

What is claim is:

1 . A display system, comprising:
a) one or more blue light emitting diode(s) (LED); b) a light guide plate, optically coupled to the blue LED; c) a display; and d) a composition comprising a plurality of phosphors, the composition oriented between the light guide plate and the display,
wherein the display system exhibits increased optical power output as compared to a display system where the light guide plate is not optically coupled to the blue LED.

2 . The display system of claim 1 , wherein the light guide plate is optically coupled to the blue LED with, a tape or an adhesive.

3 . The display system of claim 1 , wherein the light guide plate is optically coupled to the blue LED via an ecapsulant protruding from the LED.

4 . The display system of claim 1 , wherein, the phosphors are YAG phosphors, silicate phosphors, garnet phosphors, aluminate phosphors, nitride phosphors, NYAG phosphors, SiAlON phosphors and CASN phosphors.

5 . The display system of claim 1 , wherein the phosphors are luminescent nanocrystals.

6 . The display system of claim 5 , wherein the luminescent nanocrystals comprise CdSe or ZnS.

7 . The display system of claim 5 , wherein the luminescent nanocrystals comprise CdSe/ZnS, InP/ZnS, InP/ZnSe, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS.

8 . The displays system of claim 1 , wherein the composition is a film.

9 . The display system of claim 1 , wherein the display is a liquid crystal module.

10 . The display system of claim 1 , wherein the system further comprises one or more of a diffuser, one or more brightness enhancement films (BEFs) and a reflector.

11 . The display system of claim 1 , wherein the display system exhibits at least a 10% increase in optical power output as compared to a display system where the light guide plate is not optically coupled to the blue LED.

12 . A display system, comprising:
a) one or more blue light emitting diode(s) (LED); b) a light guide plate, optically coupled to the blue LED; c) a display; and d) a film comprising a plurality of phosphors, the composition oriented between the light guide plate and die display,
wherein the display system exhibits at least a 10% increase In optical power output as compared to a display system where the light guide, plate is not optically coupled to the blue LED.

13 . The display system of claim 12 , wherein the light guide plate is optically coupled to the blue LED with a tape or an adhesive.

14 . The display system of claim 12 , wherein the light guide plate is optically coupled to the blue LED via an encapsulant protruding from the LED.

15 . The display system of claim 12 , wherein the phosphors are YAG phosphors, silicate phosphors, garnet phosphors, aluminate phosphors, nitride phosphors, NYAG phosphors, SiAlON phosphors and CASN phosphors.

16 . The display system of claim 12 , wherein the phosphors are luminescent nanocrystals.

17 . The display system of claim 16 , wherein the luminescent nanocrystals comprise CdSe or ZnS.

18 . The display system of claim 16 , wherein the luminescent nanocrystals comprise CdSe/ZnS, InP/ZnS, InP/ZnSe, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS.

19 . The displays system of claim 12 , wherein the film is a polymeric film.

20 . The display system of claim 12 , wherein the display is a liquid crystal module.

21 . The display system of claim 12 , wherein the system further comprises one or more of a diffuser, one or more brightness enhancement films (BEFs) and a reflector.

22 . A display system, comprising:
a) one or more blue light emitting diode(s) (LED); b) a light guide plate, optically coupled to the blue LED; c) a polymeric film comprising a plurality of phosphors, the polymeric film oriented above the light guide plate; d) one or more brightness enhancement films (BEFs) oriented above the polymeric film; e) a top diffuser oriented above the BEFs; and f) a liquid crystal module oriented above the top diffuser,
wherein the display system exhibits at least a 10% increase in optical power output as compared to a display system where the light guide plate is not optically coupled to the blue LED.

23 . The display system of claim 22 , wherein the light pride plate is optically coupled to the blue LED with a tape or an adhesive.

24 . The display system of claim 22 , wherein the light guide plate is optically coupled, to the blue LED via an encapsulant protruding from the LED.

25 . The display system of claim 22 , wherein the phosphors are YAG phosphors, silicate phosphors, garnet phosphors, aluminate phosphors, nitride phosphors, NYAG phosphors, SiAlGN phosphors and CASN phosphors.

26 . The display system of claim 22 , wherein the phosphors are luminescent nanocrystals.

27 . The display system of claim 26 , wherein the luminescent nanocrystals comprise CdSe or ZnS.

28 . The display system of claim 26 , wherein the luminescent nanocrystals comprise CdSe/ZnS, InP/ZnS, InP/ZnSe, PbSe/PbS, CdSe/CdS, CdTe/CdS or CdTe/ZnS.

29 . The display system of claim 22 , wherein the system further comprises a reflector oriented below the light guide plate.

30 . A method of increasing the optical power output of a blue LED in a display system, comprising optically coupling the blue LED to a light guide plate of the display system.

31 . The method of claim 30 , wherein the optical coupling comprises coupling the blue LED to the light guide plate with tape or an adhesive.

32 . The method of claim 30 , wherein the light guide plate is optically coupled to the blue LED via an encapsulant protruding from the LED.

33 . The method of claim 30 , wherein the method Increases the optical power output of the blue LED by at least 10% as compared to a display system that does not comprise the blue LED optically coupled to the light guide.

Assignees

• Nanosys Inc

Inventors

• Chen Jian
• Dubrow Robert S
• Gensler Steven
• Hartlove Jason
• Lee Ernest
• Wilson Robert Edward

Classifications

• G02B6/0073 Primary

  Light emitting diode [LED] · CPC title

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02B6/005

  provided by one optical element, or plurality thereof, placed on the light output side of the light guide · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• G02B6/0053 Primary

  Prismatic sheet or layer; Brightness enhancement element, sheet or layer · CPC title