MICRO ASSEMBLED HYBRID DISPLAYS AND LIGHTING ELEMENTS

• US 20160064363A1
• Filed: 08/26/2015
• Published: 03/03/2016
• Est. Priority Date: 08/26/2014
• Status: Active Grant

• Current Assignee: X Display Company Technology Limited (Sensinnovat BVBA)
• Original Assignee: X-Celeprint Limited
• Inventors: Bower, Christopher, Meitl, Matthew, Carter, Julian, Cok, Ronald S.
• Granted Patent: US 9,716,082 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• 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: H05B 47/10 Controlling the light source
• CPC Class Codes: H10K 59/00 Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/352 the areas of the RGB subpixels being different
• CPC Class Codes: H10K 59/70 OLEDs integrated with inorganic light-emitting elements, e.g. with inorganic electroluminescent elements
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The disclosed technology relates generally hybrid displays with pixels that include both inorganic light emitting diodes (ILEDs) and organic light emitting diodes (OLEDs). The disclosed technology provides a hybrid display that uses a mixture of ILEDs and OLEDs in each pixel. In certain embodiments, each pixel in the hybrid display includes a red ILED, a blue ILED, and a green OLED. In this instance, the OLED process would not require a high resolution shadow mask, thereby enhancing the manufacturability of OLEDs for larger format displays. Additionally, the OLED process in this example would not require any fine lithography. The OLED subpixel (e.g., green subpixel) can be larger and the ILEDs can be small (e.g., micro-red and micro-blue ILEDs). The use of small ILEDs allows for other functions to be added to the pixel, such as micro sensors and micro integrated circuits.

Claims

1. A hybrid display, comprising:

a plurality of pixels disposed on a display substrate, each pixel comprising a first subpixel that emits a first color of light and a second subpixel that emits a second color of light different from the first color of light, wherein light from the first subpixel is emitted by an inorganic light emitter and light from the second subpixel is emitted by an organic light emitter.

2. The hybrid display of claim 1, wherein the inorganic light emitter is an inorganic light emitting diode (iLED) having a native semiconductor substrate separate and distinct from the display substrate.

4. The hybrid display of claim 1, wherein the organic light emitter is an organic light-emitting diode (OLED) disposed on the display substrate.

5. The hybrid display of claim 1, comprising a third subpixel emitting a third color of light different from the first color and different from the second color, wherein light from the third subpixel is emitted by an inorganic light emitter.

6. The hybrid display of claim 5, wherein the first subpixel is a red subpixel, the second subpixel is a green subpixel, and the third subpixel is a blue subpixel.

8. The hybrid display of claim 1, wherein the display substrate is a member selected from the group consisting of polymer, plastic, resin, polyimide, PEN, PET, metal, metal foil, glass, a semiconductor, and sapphire.

9. The hybrid display of claim 1, wherein the display substrate has a thickness from 5 to 10 microns, 10 to 50 microns, 50 to 100 microns, 100 to 200 microns, 200 to 500 microns, 500 microns to 0.5 mm, 0.5 to 1 mm, 1 mm to 5 mm, 5 mm to 10 mm, or 10 mm to 20 mm.

10. The hybrid display of claim 1, wherein the inorganic light emitter has at least one of a width, length, and height from 2 to 5 μ

m, 5 to 10 μ

m, 10 to 20 μ

m, or 20 to 50 μ

m.

15. The hybrid display of claim 1, wherein the area of the non-native substrate covered with ILEDs is no greater than 50%, 40%, 30%, 20%, 10%, 5%, or 3% of the display.

20. The hybrid display of claim 1, wherein each pixel comprises a integrated circuit electrically connected to each subpixel in a respective pixel.

21. The hybrid display of claim 20, wherein the integrated circuits are on the same plane as the light emitters.

3. (canceled)

7. (canceled)

11-14. -14. (canceled)

16-19. -19. (canceled)

22-34. -34. (canceled)

35. A method of micro assembling a hybrid display having a plurality of pixels, each pixel comprising inorganic light emitting diodes (ILEDs) and organic light emitting diodes (OLEDs), the method comprising:

providing a plurality of ILEDs; and

micro transfer printing the plurality of printable ILEDs onto a display substrate separate and distinct from the semiconductor substrates of the iLEDs, wherein the ILEDs are electrically connected following printing onto the non-native substrate; and

forming an OLED in each pixel of the hybrid display; and

forming a plurality of anodes (e.g., ITO anode) for a plurality of green OLED on the surface of a display substrate, wherein the plurality of anodes are formed prior to micro transfer printing the plurality of ILEDs.

36-66. -66. (canceled)

67. A hybrid display, comprising:

a plurality of heterogeneous pixels disposed on a display substrate, each pixel comprising a first subpixel that emits a first color of light and a second subpixel that emits a second color of light different from the first color of light, wherein light from the first subpixel is emitted by a first light emitter and light from the second subpixel is emitted by a second light emitter having a different size than the first light emitter.

68. The hybrid display of claim 67, wherein the first light emitter is an inorganic light emitter and the second light emitter is an organic light emitter.

69. The hybrid display of claim 67, wherein the first light emitter is an inorganic light emitter and the second light emitter is an inorganic light emitter.

71. The hybrid display of claim 69, wherein the inorganic light emitters have at least one of a width, length, and height from 2 to 5 μ

m, 5 to 10 μ

m, 10 to 20 μ

m, or 20 to 50 μ

m.

73. The hybrid display of claim 67, comprising a third light emitter.

74. The hybrid display of claim 73, wherein the third light emitter has a different size than the first light emitter, a different size than the second light emitter, or a different size than the first light emitter and the second light emitter.

75. The hybrid display of claim 73, wherein the first light emitter is a red light emitter that emits red light, the second light emitter is a green light emitter that emits green light, and the third light emitter is a blue light emitter that emits blue light.

83. The hybrid display of claim 67, comprising a pixel controller for controlling the first and second light emitters and wherein the pixel controller comprises a control circuit that controls the first light emitter differently from the second light emitter.

70. (canceled)

72. (canceled)

76-82. -82. (canceled)

84-100. -100. (canceled)