Wearable display

• US 8,766,531 B1
• Filed: 12/14/2012
• Issued: 07/01/2014
• Est. Priority Date: 12/14/2012
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Ma, Ruiqing, Pang, Huiqing
• Primary Examiner(s): RALEIGH, DONALD L
• Application Number:
  US13/715,135
• Publication Number:
  US 20140167602A1
• Time in Patent Office: 564 Days
• Field of Search: 313498-512
• US Class Current: 313/504
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/125 specially adapted for multicolour light emission, e.g. for emitting white light

Abstract

OLED displays capable of operation at a sunlight readable luminance value are disclosed. Devices as disclosed may be wearable such that the display is flexible and the operating temperature rise due to the display operation is below a threshold. Displays with an operating power consumption density of not more than 65 mW/cm² when operating at 78 mW/cm² at 100% full white are also provided.

Claims

1. A wearable device comprising:

a flexible display comprising a phosphorescent first emissive layer;

wherein the display is capable of operation at a luminance value of at least 700 cd/m² without exceeding an operating temperature increase of 26°

C.

2. The device as recited in claim 1, wherein the display comprises a plurality of pixels with a combined resolution of at least 200 dpi.

3. The device as recited in claim 1, further comprising a second emissive layer having a peak emission wavelength different from the first emissive layers.

4. The device as recited in claim 3, further comprising a third emissive layer having a peak emission wavelength different from the first and second emissive layers.

5. The device as recited in claim 4, wherein the second emissive layer has a deep blue peak emission wavelength, and wherein the third emissive layer has a light blue peak emission wavelength.

6. The device as recited in claim 4, further comprising a fourth organic emissive layer having a peak emission wavelength different from the first, second, and third emissive layer.

7. The device of claim 6, wherein the fourth organic emissive layer has an infra-red emission wavelength.

8. The device of claim 6, wherein the fourth organic emissive layer has a light blue emission wavelength.

9. The device of claim 6, wherein the fourth organic emissive layer has a dark blue emission wavelength.

10. The device as recited in claim 1, wherein the display dims to operate at a luminance value less than 700 cd/m² based on ambient lighting conditions.

11. The device as recited in claim 1, wherein the display dims to operate at a luminance value less than 700 cd/m² based on one or more factors selected from the group consisting of:

the amount of battery power available to the device, a user selected setting, a time, a location, a height, and the content displayed on the device.

12. The device as recited in claim 1, further comprising a touch sensitive surface.

13. The device as recited in claim 12, wherein the touch sensitive surface is responsive to multiple touch inputs.

14. The device as recited in claim 1, wherein a backplane of the display is fabricated on a substrate selected from the group consisting of a plastic substrate, a metal substrate, and a glass substrate.

15. The device as recited in claim 1, wherein a backplane of the display is fabricated on a substrate selected from the group consisting of a thin metal substrate and a thin glass substrate.

16. The device as recited in claim 1, wherein the display is encapsulated by a single layer barrier.

17. The device as recited in claim 3, wherein the first and second emissive layer are disposed in a vertical stack.

18. The device as recited in claim 17, further comprising a color filter disposed over the first and second emissive layers.

19. The device as recited in claim 1, wherein the display comprises a full-color display having an operating power consumption density of not more than about 78 mW/cm² when operating at 700 cd/m² at 100% full white.

20. The device as recited in claim 19, wherein the display has an operating power consumption density of not more than about 65 mW/cm² when operating at 700 cd/m² at 100% full white.

21. The device as recited in claim 1, wherein the device comprises a device type selected from the group consisting of:

a full-color display, a flexible display in a consumer device, a mobile phone, a pad computer, a smartphone, a portable computer, a monitor, a television, and a consumer device including a flexible display.

22. The device as recited in claim 1, further comprising:

a second emissive layer disposed in a vertical stack with the first emissive layer;

a third emissive layer deposited in a vertical stack with the first emissive layer and the second emissive layer to form a white emissive stack; and

a color filter disposed in a vertical stack with the white emissive stack.

23. A wearable display system comprising:

a flexible display comprising an organic first emissive layer with a first peak wavelength operating at an efficiency of 30 cd/A at sunlight readable luminance level;

wherein the display is sunlight-readable; and

wherein the system exhibits an operating temperature rise of 29°

C. or less.

24. The system as recited in claim 23, wherein the display operates at an efficiency of 45 cd/A, and the system exhibits an operating temperature rise of 26 C or less.

25. The system as recited in claim 23, wherein the first emissive layer has a peak emission wavelength of 580-700 nm.

26. The system as recited in claim 23, wherein the display comprises a plurality of pixels with a combined resolution of at least 200 dpi.

27. The system as recited in claim 23, further comprising a second organic emissive layer having a peak emission wavelength different from the organic first emissive layers.

28. The system as recited in claim 23, further comprising a third organic emissive layer having a peak emission wavelength different from the first and second emissive layers.

29. The system as recited in claim 28, wherein the second emissive layer has a deep blue peak emission wavelength, and wherein the third emissive layer has a light blue peak emission wavelength.

30. The system as recited in claim 28, further comprising a fourth organic emissive layer having a peak emission wavelength different from the first, second, and third emissive layer.

31. The system of claim 30, wherein the fourth organic emissive layer has an infra-red emission wavelength.

32. The device of claim 30, wherein the fourth organic emissive layer has a light blue emission wavelength.

33. The device of claim 30, wherein the fourth organic emissive layer has a dark blue emission wavelength.

34. The system as recited in claim 23, wherein the display dims to operate at a luminance value less than 700 cd/m² based on ambient lighting conditions.

35. The system as recited in claim 23, wherein the display dims to operate at a luminance value less than 700 cd/m² based on one or more factors selected from the group consisting of:

the amount of battery power available to the device, a user selected setting, a time, a location, a height, and the content displayed on the device.

36. The system as recited in claim 23, further comprising a touch sensitive surface.

37. The system as recited in claim 36, wherein the touch sensitive surface is responsive to multiple touch inputs.

38. The system as recited in claim 23, wherein a backplane of the display is fabricated on a substrate selected from the group consisting of a plastic substrate, a thin metal substrate, and a thin glass substrate.

39. The system as recited in claim 23, wherein the display is encapsulated by a single layer barrier.

40. The system as recited in claim 27, wherein the first and second emissive layer are disposed in a vertical stack.

41. The system as recited in claim 40, further comprising a color filter disposed over the first and second emissive layers.

42. The system as recited in claim 23, wherein the display comprises a full-color display having an operating power consumption density of not more than about 78 mW/cm² when operating at sunlight readable luminance conditions.

43. The system as recited in claim 42, wherein the display has an operating power consumption density of not more than about 65 mW/cm² when operating at sunlight readable luminance conditions.

44. The system as recited in claim 23, wherein the device comprises a device type selected from the group consisting of:

a full-color display, a flexible display in a consumer device, a mobile phone, a pad computer, a smartphone, a portable computer, a monitor, a television, and a consumer device including a flexible display.

45. The system as recited in claim 23, wherein the device weighs no more than 95 grams.

46. The system as recited in claim 23, wherein the device weighs no more than 140 grams.

47. The system as recited in claim 23, wherein the device comprises at least one dimension which is no more than 8 mm thick.

48. The system as recited in claim 23, wherein the device comprises at least one dimension which is no more than 15 mm thick.

49. The system as recited in claim 23, further comprising a processor adapted to operate the display.

50. The system as recited in claim 23, further comprising a thin film battery.

51. The system as recited in claim 23, further comprising a solar cell.

52. The system as recited in claim 23, further comprising at least one sensor selected from the group consisting of an accelerometer, temperature sensor, sound sensor, a motion sensor, a position sensor, a light sensor and an orientation sensor.

53. The system as recited in claim 52, wherein the system is configured to enter a power save mode based on the input of the at least one sensor.

54. The system as recited in claim 52, wherein the at least one sensor is configured to increase the luminance of the display based on a change in sensor input.

55. The system as recited in claim 23, further comprising:

a second emissive layer disposed in a vertical stack with the first emissive layer;

a third emissive layer deposited in a vertical stack with the first emissive layer and the second emissive layer to form a white emissive stack; and

a color filter disposed in a vertical stack with the white emissive stack.