Tunable OLED lighting source

Patent metadata

Field	Value
Publication number	US-10177126-B2
Application number	US-201514956611-A
Country	US
Kind code	B2
Filing date	Dec 2, 2015
Priority date	Dec 16, 2014
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Described herein are devices and methods related to lighting systems that are color tunable and have a long lifetime. In certain embodiments, the device comprises two independently controlled phosphorescent OLED lighting panels coupled together in one package to emit light in one direction. In certain embodiment, aspects of the device are tunable, such as RGB color, color temperature, and luminance.

First claim

We claim:

1. An OLED device, comprising:
a first OLED unit deposited over an opaque first substrate, the first OLED unit comprising an anode, a transparent cathode, and at least one organic light emitting layer between the anode and cathode; and
a second transparent OLED unit deposited over a transparent second substrate, the second OLED unit comprising an anode, a cathode, and at least one organic light emitting layer between the anode and cathode;
wherein the first and second OLED units are hermetically sealed between the first and second substrates; and
a controller configured to drive the first and second OLED units independently to:
adjust the intensity of one or both of the first and second OLED units to modify the color temperature of the emitted light; or
adjust the luminance output of the device yet maintain a substantially consistent color temperature of the device.

2. The device of claim 1 , further comprising an empty gap between the first and second OLED units.

3. The device of claim 1 , wherein at least a portion of the second OLED unit is in direct contact with the first OLED unit.

4. The device of claim 1 , wherein one of the first or second OLED units emits blue light and the other OLED unit emits yellow or white light, and the blue emitting OLED unit emits only blue light.

5. The device of claim 1 , further comprising a reflective layer between the first substrate and the first OLED unit.

6. The device of claim 1 , wherein the first substrate is also reflective.

7. The device of claim 1 , wherein the first OLED unit emits deep blue light in a weak cavity.

8. The device of claim 1 , wherein the first OLED unit emits a light blue light shiftable to deep blue by a microcavity.

9. The device of claim 1 , further comprising a light sensor selected from the group consisting of a photoresistor, a photodiode for determining the intensity of emitted light, and a color sensor for determining the hue and temperature of light emitted from the device.

10. The device of claim 1 , wherein the at least one organic light emitting layer of the first OLED unit and the at least one organic light emitting layer of the second OLED unit are deposited over the respective substrates by organic vapor jet printing.

11. An OLED device, comprising:
a first OLED unit deposited over an opaque first substrate, the first OLED unit comprising an anode, a transparent cathode, and at least one organic light emitting layer positioned between the anode and cathode that emits blue light;
a second OLED unit deposited over a transparent second substrate, the second OLED unit comprising an anode, a cathode, and at least one organic light emitting layer positioned between the anode and cathode that emits yellow or white light; and
at least one light sensor in communication with a controller;
wherein the first and second OLED units are hermetically sealed between the first and second substrates.

12. The device of claim 11 , wherein the controller is configured to drive the first and second OLED units independently; and the controller regulates the output of the first OLED unit based on the output of the second OLED unit.

13. The device of claim 11 , further comprising a gap between the first and second OLED units.

14. The device of claim 11 , wherein at least a portion of the second OLED unit is in direct contact with the first OLED unit.

15. The device of claim 11 , wherein first OLED unit emits deep blue light in a weak cavity.

16. The device of claim 11 , wherein the first OLED unit emits a light blue light shiftable to deep blue by a microcavity.

17. The device of claim 11 , further comprising a reflective layer between the first substrate and the first OLED unit.

18. The device of claim 11 , wherein the light sensor is selected from the group consisting of a photoresistor, a photodiode for determining the intensity of emitted light, or a color sensor for determining the hue and temperature of light emitted from the device.

19. The device of claim 11 , wherein the controller adjusts the intensity of one or both of the first and second OLED units to modify the color temperature of the emitted light.

20. The device of claim 11 , wherein the controller adjusts the luminance output of the device yet maintains a substantially consistent color temperature of the device.

Assignees

• Universal Display Corp

Inventors

• Hack Michael
• Weaver Michael S

Classifications

• H10W90/00

  Package configurations · CPC title

• H01L25/167 Primary

  Electricity · mapped topic

• H01L2924/0002

  Electricity · mapped topic

• H01L2924/00

  Electricity · mapped topic

• H01L51/524

  Electricity · mapped topic