Method of addressing an LED array with light intensity adaptive LED sidewalls

Patent metadata

Field	Value
Publication number	US-11489095-B2
Application number	US-202016912496-A
Country	US
Kind code	B2
Filing date	Jun 25, 2020
Priority date	Dec 21, 2017
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A first pixel with a first pixel sidewall is disclosed. A second pixel with a second pixel sidewall facing the first pixel sidewall is also disclosed. A first dynamic optical isolation material between the first pixel sidewall and the second pixel sidewall and configured to change an optical state based on a state trigger such that a light behavior at the first pixel sidewall for a light emitted by one of the first pixel and the second pixel is determined by the optical state, is also disclosed.

First claim

The invention claimed is:

1. A method comprising:
addressing a first contiguous group of pixels in an array of pixels causing pixels in the first group of pixels to emit light, each pixel in the array of pixels comprising a semiconductor light emitting structure and dynamic optical isolation material attached to sidewalls of each pixel, the dynamic optical isolation material switchable between a plurality of optical states based on a state trigger; and
sending a state trigger to the dynamic optical isolation material located between two pixels in the first group of pixels causing the dynamic optical isolation material located between pixels in the first group of pixels to switch from a state that hinders transmission of light to a transparent state while dynamic optical isolation material located between two pixels of the array of pixels not in the first group of pixels remains in a state that hinders transmission of light.

2. The method of claim 1 comprising
addressing a second contiguous group of pixels in the array of pixels causing the semiconductor light emitting structures of the pixels in the second group of pixels to emit light; and
sending a state trigger to the dynamic optical isolation material located between two pixels in the second group of pixels causing the dynamic optical isolation material located between pixels in the second group of pixels to switch from a state that hinders transmission of light to a transparent state.

3. The method of claim 1 , wherein the dynamic optical isolation material is a thermochromic material and the state trigger is a change in a temperature of the dynamic optical isolation material.

4. The method of claim 3 , wherein the change in the temperature of the dynamic isolation material is caused by heat dissipated by a pixel adjacent to the dynamic optical isolation material.

5. The method of claim 1 , wherein the dynamic optical isolation material is a thermochromic material and the state trigger is heating the optical dynamic isolation material to a threshold temperature.

6. The method of claim 5 , wherein heating the dynamic isolation material to a threshold temperature is caused by a pixel adjacent to the dynamic optical isolation material.

7. The method of claim 5 , wherein heating the dynamic optical isolation material to a threshold temperature is caused by pixel to which the dynamic optical isolation material is attached.

8. The method of claim 5 , wherein heating the dynamic optical isolation material to a threshold temperature is caused by a pixel adjacent to the dynamic optical isolation material and a pixel to which the dynamic optical isolation material is attached.

9. The method of claim 1 , wherein the dynamic optical isolation material is a photochromic material and the state trigger a light-based trigger.

10. The method of claim 9 , wherein the light-based trigger is UV light.

11. The method of claim 1 , wherein the transparent state is at least 95% transparent.

12. A method comprising:
addressing a first contiguous group of pixels in an array of pixels causing pixels in the first group of pixels to not emit light, each pixel in the array of pixels comprising a semiconductor light emitting structure and dynamic optical isolation material attached to sidewalls of each pixel, the dynamic optical isolation material switchable between a plurality of optical states based on a state trigger; and
sending a state trigger to the dynamic optical isolation material located between two pixels in the first group of pixels causing the dynamic optical isolation material located between pixels in the first group of pixels to switch from a transparent state to a state that hinders transmission of light while dynamic optical isolation material located between two pixels of the array of pixels not in the first group of pixels remains in a transparent state.

13. The method of claim 12 , wherein the dynamic optical isolation material is a thermochromic material and the state trigger is a change in a temperature of the dynamic optical isolation material.

14. The method of claim 12 , wherein the dynamic optical isolation material is a thermochromic material and the state trigger is cooling the optical isolation material to a threshold temperature.

15. The method of claim 14 , wherein cooling the dynamic optical isolation material to a threshold temperature is caused by a pixel adjacent to the dynamic optical isolation material.

16. The method of claim 15 , wherein cooling the dynamic optical isolation material to a threshold temperature is caused by pixel to which the dynamic optical isolation material is attached.

17. The method of claim 15 , wherein cooling the dynamic optical isolation material to a threshold temperature is caused by a pixel adjacent to the dynamic optical isolation material and a pixel to which the dynamic optical isolation material is attached.

18. The method of claim 15 , wherein the dynamic optical isolation material is a photochromic material and the state trigger a light-based trigger.

19. The method of claim 18 , wherein the light-based trigger is UV light.

20. The method of claim 12 , wherein the transparent state is at least 95% transparent.

Assignees

• Lumileds Llc

Inventors

• Shimizu Kentaro
• Bohmer Marcel Rene
• Estrada Daniel
• Heuts Jacobus Johannes Franciscus Gerardus

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• G02F2203/01

  transmissive · CPC title

• B60Q1/1423

  Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic · CPC title

• G02F1/0147

  based on thermo-optic effects (G02F1/132 takes precedence) · CPC title

• F21V23/005

  the substrate is supporting also the light source · CPC title