Display, LED chip therefor, pixel therefor, controlling method therefor, computer program therefor

• US 10,535,295 B2
• Filed: 10/22/2015
• Issued: 01/14/2020
• Est. Priority Date: 10/22/2014
• Status: Active Grant

• Current Assignee: META Platforms Technologies LLC (Meta Platforms, Inc. (f/k/a Facebook, Inc.))
• Original Assignee: Facebook Technologies, LLC (Meta Platforms, Inc. (f/k/a Facebook, Inc.))
• Inventors: Hughes, Padraig, Henry, William, O'Keeffe, Joseph
• Primary Examiner(s): Edouard, Patrick N
• Assistant Examiner(s): Shen, Peijie
• Application Number:
  US15/520,403
• Publication Number:
  US 20170323592A1
• Time in Patent Office: 1,545 Days
• Field of Search: None
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2330/08 Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
• CPC Class Codes: G09G 3/2088 with use of a plurality of processors, each processor controlling a number of individual elements of the matrix
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• 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: H01L 33/20 with a particular shape, e.g. curved or truncated substrate
• CPC Class Codes: H10K 59/129 Chiplets
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

A display (100) comprising a plurality of LED chips (604), each LED chip (604) comprising a plurality of light emitting elements (606a-c). Each LED chip (604) is arranged such that a first light emitting element (606a) is configured to illuminate a sub-pixel, and a second light emitting element (606b) is configured to illuminate a sub-pixel using substantially the same wavelength of light as the first light emitting element. There is also described an LED chip, a display pixel, a controlling method, a computer device and a computer program for a display.

Claims

1. A display comprising:

light emitting diode (LED) chips, each LED chip being a separate and singulated piece of semiconductor material and comprising a plurality of light emitting elements;

wherein each LED chip is arranged such that a first light emitting element is configured to illuminate a sub-pixel of a first display pixel, and a second light emitting element is configured to illuminate a sub-pixel of a second display pixel adjacent to the first pixel using the same wavelength of light as the first light emitting element, and each display pixel includes multiple sub-pixels with each sub-pixel being from a different LED chip.

2. The display according to claim 1, wherein the first and second light emitting elements are selected from any of an inorganic LED and an organic LED.

3. The display according to claim 1, wherein each LED chip comprises a plurality of Addressable Array Elements, each Addressable Array Element providing a light emitting element.

4. The display according to claim 1, wherein each LED chip is integrated with a substrate, the substrate configured to provide control and power to each LED chip.

5. The display according to claim 4, wherein the substrate comprises any of an active matrix control and a passive matrix control.

6. The display according to claim 1, further comprising an optical film disposed over the plurality of LED chips, the optical film configured to direct light from each light emitting element.

7. The display according to claim 1, wherein each LED chip has a geometric shape such that each light emitting element is located at a corner of the LED chip.

8. The display according to claim 1, wherein each LED chip is triangular, having a light emitting element located towards each corner, and each display pixel is hexagonal, each LED chip being located at an intersection of three adjacent display pixels thereby forming a sub-pixel in each of the three adjacent display pixels.

9. The display according to claim 1, wherein the first and second light emitting elements of each LED chip share a common cathode.

10. The display according to claim 1, wherein each LED chip is triangular, having a light emitting element located towards each corner, to provide a sub-pixel in each of three adjacent display pixels.

11. The LED chip according to claim 10, further comprising a plurality of Addressable Array Elements, each Addressable Array Element providing a light emitting element.

12. The LED chip according to claim 10, wherein the LED chip is integrated with a substrate, the substrate configured to provide control and power to the LED chip.

13. A method of controlling a display, the method comprising controlling power to a plurality of light emitting elements located in a display pixel of the display,

each light emitting element in the display pixel provided by a different light emitting diode (LED) chip,

each LED chip being a separate and singulated piece of semiconductor material and including multiple of light emitting elements that emit light of the same wavelength, the multiple light emitting elements of each LED chip each providing a sub-pixel of a different display pixel.

16. The method of claim 13, wherein

the plurality of light emitting elements located in the display pixel emit light at different wavelengths.

14. A computer device comprising:

a display including display pixels, wherein each light emitting element in a display pixel is provided by a different light emitting diode (LED) chip, each LED chip being a separate and singulated piece of semiconductor material and including multiple of light emitting elements that emit light of the same wavelength, the multiple light emitting elements of each LED chip each providing a sub-pixel of a different display pixel; and

a processor connected to the display and configured to control power to the light emitting elements located in the display pixel of the display.

15. The computer device of claim 14, wherein

the light emitting elements in the display pixel emit light at different wavelengths.