Lighting devices

• US 9,018,660 B2
• Filed: 03/25/2013
• Issued: 04/28/2015
• Est. Priority Date: 03/25/2013
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Pang, Huiqing, Ma, Ruiqing
• Primary Examiner(s): Nguyen, Cuong Q
• Assistant Examiner(s): Gebreyesus, Yosef
• Application Number:
  US13/850,084
• Publication Number:
  US 20140284555A1
• Time in Patent Office: 764 Days
• Field of Search: 257/13, 257/40, 257/94, 257/95, 257/96, 257/97, 257/98, 257/99, 257/100, 257/101, 257/102, 257/103, 257/104, 257/E51.017, 257/E51.018, 257/E51.022, 257/E51.026, 438/29, 438/69, 438/99
• US Class Current: 257/98
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]
• CPC Class Codes: H10K 2101/00 Properties of the organic materials covered by group H10K85/00
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/80 Constructional details
• CPC Class Codes: H10K 85/342 comprising iridium

Abstract

A device includes a light emitting assembly including at least one light panel including at least one phosphorescent organic light emitting device. A total light emitting area of the light emitting assembly is greater than 1000 cm². The device exhibits a luminous emittance of at least 7000 lm/m² and a peak luminance of less than 5000 cd/m². The light emitting assembly has a luminaire emissive utilization of at least 60 percent.

Claims

1. A device, comprising:

a light emitting assembly comprising at least one light panel comprising at least one phosphorescent organic light emitting device, a total light emitting area of the light emitting assembly having an area greater than 1000 cm², the device exhibiting a luminous emittance of at least 7000 lm/m² and a peak luminance of less than 5000 cd/m², the light emitting assembly having a luminaire emissive utilization of at least 60 percent.

2. The device of claim 1 wherein light emitted by the at least one light panel includes no greater than 1% light having a peak wavelength less than 440 nm.

3. The device of claim 1 wherein the device exhibiting a luminous emittance of at least 10000 lm/m² and a peak luminance of less than 5000 cd/m².

4. The device of claim 1 wherein a maximum temperature of the at least one light panel during illumination in ambient conditions is no greater than 40°

C.

5. The device of claim 1 wherein a maximum temperature of the at least one light panel during illumination in ambient conditions is no greater than 35°

C.

6. The device of claim 1 wherein a temperature variance across an area of the at least one light panel is no greater than +/−

5°

C.

7. The device of claim 1 wherein the light emitting assembly further comprises a bezel encompassing the at least one light panel, wherein the bezel is no greater than 5 mm in width.

8. The device of claim 1 wherein the light emitting assembly further comprises a bezel encompassing the at least one light panel, wherein the bezel is no greater than 3 mm in width.

9. The device of claim 1 wherein the light emitting assembly further comprises a bezel encompassing the at least one light panel, wherein the bezel is no greater than 1 mm in width.

10. The device of claim 1 wherein the light emitting assembly further comprises a bezel encompassing the at least one light panel, wherein the bezel is no greater than 0.1 mm in width.

11. The device of claim 1 wherein the at least one light panel comprises a plurality of phosphorescent organic light emitting devices and a color temperature of the at least one light panel is adjustable.

12. The device of claim 1 wherein a contrast ratio of the light emitting assembly is no greater than 1.6.

13. The device of claim 1 wherein a contrast ratio of the light emitting assembly is no greater than 1.3.

14. The device of claim 1 wherein a contrast ratio of the light emitting assembly is no greater than 1.1.

15. The device of claim 1 wherein the luminaire emissive utilization of the light emitting assembly is at least 70%.

16. The device of claim 1 wherein the luminaire emissive utilization of the light emitting assembly is at least 80%.

17. The device of claim 1 wherein the luminaire emissive utilization of the light emitting assembly is at least 90%.

18. The device of claim 1 wherein the at least one light emitting panel is flexible.

19. The device of claim 1 wherein the at least one light emitting panel is transparent.

20. The device of claim 1 wherein the at least one light panel comprises a plurality of phosphorescent organic light emitting devices and the light emitting assembly is color tunable.

21. The device of claim 1 wherein the at least one light panel comprises a plurality of organic light emitting devices emitting red light, a plurality of organic light emitting devices emitting green light and a plurality of organic light emitting devices emitting blue light, wherein at least the plurality of organic light emitting devices emitting red light and the plurality of organic light emitting devices emitting green light are phosphorescent organic light emitting devices

22. The device of claim 21 wherein the plurality of organic light emitting devices emitting blue light are phosphorescent organic light emitting devices.

23. A method of fabricating a device comprising a light emitting assembly, comprising:

forming at least one light panel comprising at least one phosphorescent organic light emitting device disposed upon a substrate such that a total light emitting area of the light emitting assembly has an area greater than 1000 cm², the device exhibiting a luminous emittance of at least 7000 lm/m² and a peak luminance of less than 5000 cd/m², and

assembling the at least one light panel into the light emitting assembly, wherein a luminaire emissive utilization of the light emitting assembly is at least 60%.

24. A method of providing lighting, comprising:

providing a device comprising a light emitting assembly comprising at least one light panel comprising at least one phosphorescent organic light emitting device, a total light emitting area of the light emitting assembly having an area greater than 1000 cm², the device exhibiting a luminous emittance of at least 7000 lm/m² and a peak luminance of less than 5000 cd/m², the light emitting assembly having a luminaire emissive utilization of at least 60%.