Lighting devices

• US 10,514,136 B2
• Filed: 03/25/2013
• Issued: 12/24/2019
• Est. Priority Date: 03/25/2013
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Ma, Ruiqing, Pang, Huiqing
• Primary Examiner(s): Song, Zheng
• Application Number:
  US13/850,028
• Publication Number:
  US 20140286008A1
• Time in Patent Office: 2,465 Days
• Field of Search: 362 84, 362614, 36224902
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21S 6/00 Lighting devices intended to be free-standing F21S9/00, F21S10/00, F21S13/12 take precedence lighting devices specially adapted to be transported from place to place, e.g. lighting devices carried on wheeled supports F21L; details of supports for lighting devices F21V21/00
• CPC Class Codes: F21V 23/0485 the sensor sensing the physical interaction between a user and certain areas located on the lighting device, e.g. a touch sensor
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2115/15 Organic light-emitting diodes [OLED]
• CPC Class Codes: H05B 45/60 Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

A device includes a light emitting assembly including at least one light panel including one or more phosphorescent organic light emitting devices. The device may, for example, be a personal lighting device. The at least one light panel has a peak luminance less than 5,000 cd/m², an efficiency of greater than 30 lm/W, and a maximum surface temperature during illumination in ambient conditions of no greater than 40° C., At least a portion of the light emitting assembly is touch sensitive to provide control of the device.

Claims

1. A device, comprising:

a light emitting assembly comprising at least one light panel comprising one or more phosphorescent organic light emitting devices, the at least one light panel having a peak luminance greater than substantially 1000 cd/m² and less than substantially 5,000 cd/m², an efficiency of greater than 30 lm/W, and a maximum surface temperature during illumination in ambient conditions of no greater than 40°

C., wherein at least a portion of an active area of the at least one light panel is touch sensitive to provide control of the device,

wherein the portion of the active area that is touch sensitive includes a first section to control a color temperature of at least one light panel of the light emitting assembly and a second section to control dimming of at least one light panel of the light emitting assembly, wherein another portion of the active area of the at least one light panel displays a color space of the light emitting assembly.

2. The device of claim 1 wherein touch sensitivity is provided by sensing a change in resistance, by sensing a change in an acoustic wave, by sensing a change in capacitance, by sensing a disruption of infrared light, by sensing piezoelectricity or by sensing an acoustic pulse, or by sensing pressure to the panel.

3. The device of claim 1 wherein at least a portion of a surface of the light emitting assembly from which light is not emitted is touch sensitive.

4. 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.

5. The device of claim 1 wherein control of the device via touch sensitivity includes on/off control.

6. The device of claim 1 wherein control of the device via touch sensitivity includes color control.

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 3 mm in width.

8. The device of claim 7 wherein the bezel is no greater than 1 mm in width.

9. 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.

10. The device of claim 1 wherein the device is a personal lighting device.

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

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

13. The device of claim 1 wherein a luminaire emissive utilization of the light emitting assembly is greater than 50%.

14. The device of claim 1 wherein a luminaire emissive utilization of the light emitting assembly is greater than 60%.

15. The device of claim 1 wherein a luminaire emissive utilization of the light emitting assembly is greater than 75%.

16. The device of claim 1 wherein a luminaire emissive utilization of the light emitting assembly is greater than 85%.

17. The device of claim 1 wherein a luminaire emissive utilization of the light emitting assembly is greater than 90%.

18. The device of claim 1 wherein an overall thickness of the light emitting assembly of the device is no greater than 5 mm.

19. The device of claim 1, wherein the device emits greater than 150 lumens of light during illumination.

20. The device of claim 1, wherein the device emits the peak luminance without glare.

21. The device of claim 1, wherein a third section controls a color temperature of at least one light panel of the light emitting assembly and a forth section controls total light output of at least one light panel of the light emitting assembly.

22. A method of providing personal lighting, comprising:

providing a device comprising a light emitting assembly comprising at least one light panel comprising one or more phosphorescent organic light emitting devices, the at least one light panel having a peak luminance greater than substantially 1000 cd/m² and less than substantially 5,000 cd/m², an efficiency of greater than 30 lm/W, and a maximum surface temperature during illumination in ambient conditions of no greater than 40°

C.; and

providing a touch sensitive surface on at least a portion of an active area of the at least one light panel to provide control of the device,

wherein the portion of the active area that is touch sensitive includes a first section to control a color temperature of at least one light panel of the light emitting assembly and a second section to control dimming of at least one light panel of the light emitting assembly, wherein another portion of the active area of the at least one light panel displays a color space of the light emitting assembly.

23. The method of claim 22 wherein touch sensitivity is provided by sensing a change in resistance, by sensing a change in an acoustic wave, by sensing a change in capacitance, by sensing a disruption of infrared light, by sensing piezoelectricity or by sensing an acoustic pulse.

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

forming at least one light panel comprising disposing a plurality of phosphorescent organic light emitting devices upon a substrate, the at least one light panel having a peak luminance greater than substantially 1000 cd/m² and less than substantially 5,000 cd/m², an efficiency of greater than 30 lm/W, and a maximum surface temperature during illumination in ambient conditions of no greater than 40°

C.;

assembling the at least one light panel into the light emitting assembly of the device, and

providing a touch sensitive surface on at least a portion of an active area of the at least one light panel to provide control of the device,

wherein the portion of the active area that is touch sensitive includes a first section to control a color temperature of at least one light panel of the light emitting assembly and a second section to control dimming of at least one light panel of the light emitting assembly, wherein another portion of the active area of the at least one light panel displays a color space of the light emitting assembly.