Tunable Florescent Quantum Dot System for Eye Tracking with Virtual Reality and Augmented Reality Applications

Patent metadata

Field	Value
Publication number	US-2023359029-A1
Application number	US-202217738546-A
Country	US
Kind code	A1
Filing date	May 6, 2022
Priority date	May 6, 2022
Publication date	Nov 9, 2023
Grant date	—

Abstract

A tunable fluorescent quantum dot may be utilized for illumination of artificial reality displays or waveguides. The tunable quantum dot may include a core fluorescence quantum dot and multiple coatings that may activate based on different wavelengths of one or more activation energies.

First claim

What is claimed:

1 . A tunable fluorescent quantum dot comprising:
a core comprising a fluorescent quantum dot having a first size, wherein the core comprises a first material that is activated by a first activation energy; and a first coating layer substantially encompassing the core, wherein the first coating layer comprises a second material that is activated by a second activation energy, wherein the first activation energy is different from the second activation energy.

2 . The tunable fluorescent quantum dot of claim 1 , wherein the first activation energy does not activate the second material.

3 . The tunable fluorescent quantum dot of claim 1 , wherein the tunable fluorescent quantum dot is incorporated within an artificial reality system.

4 . The tunable fluorescent quantum dot of claim 1 , further comprising:
a second coating layer substantially encompassing the core and the first coating layer, wherein the second coating layer comprises a third material that is activated by a third activation energy, and wherein the third activation energy is different from the first activation energy and the second activation energy.

5 . The tunable fluorescent quantum dot of claim 1 , wherein the first material is activated to emit a first spectral radiance that is different from a second spectral radiance that is activated by the second activation energy.

6 . The tunable fluorescent quantum dot of claim 1 , wherein the first material is activated to emit a first spectral radiance based on the first activation energy.

7 . The tunable fluorescent quantum dot of claim 1 , wherein the first activation energy comprises electrical energy or magnetic energy.

8 . The tunable fluorescent quantum dot of claim 1 , wherein the second activation energy comprises phonon energy or chemical energy.

9 . The tunable fluorescent quantum dot of claim 1 , wherein the first activation energy comprises a first wavelength that is different than the second activation energy which comprises a second wavelength.

10 . An apparatus comprising:
one or more processors; and at least one memory storing instructions, that when executed by the one or more processors, cause the apparatus to:
transmit a first activation energy to a tunable fluorescent quantum dot, the tunable fluorescent quantum dot comprises a core comprising a fluorescent quantum dot having a first size, wherein the core comprises a first material that is activated by the first activation energy to a first spectral radiance;
receive an indication to change the tunable fluorescent quantum dot to a second spectral radiance, wherein the first spectral radiance is different than the second spectral radiance; and
transmit, based on the indication to change, a second activation energy to a first coating layer of the tunable fluorescent quantum dot, the first coating layer comprising a second material, wherein the second activation energy causes the second spectral radiance.

11 . The apparatus of claim 10 , wherein the indication to change the tunable fluorescent quantum dot is from a component of an artificial reality system.

12 . The apparatus of claim 10 , wherein the first spectral radiance or the second spectral radiance is used with an eye tracking system of an artificial reality system.

13 . The apparatus of claim 10 , wherein the first spectral radiance or the second spectral radiance to facilitate display by an artificial reality system.

14 . The apparatus of claim 10 , wherein the first activation energy comprises magnetic energy.

15 . The apparatus of claim 10 , wherein the second activation energy comprises phonon energy.

16 . A method comprising:
transmitting a first activation energy to a tunable fluorescent quantum dot, the tunable fluorescent quantum dot comprises a core comprising a fluorescent quantum dot having a first size, the core comprises a first material that is activated by the first activation energy to a first spectral radiance; receiving an indication to change the tunable fluorescent quantum dot to a second spectral radiance, wherein the first spectral radiance is different than the second spectral radiance; and transmitting, based on the indication to change, a second activation energy to a first coating layer of the tunable fluorescent quantum dot, the first coating layer comprising a second material, wherein the second activation energy causes the second spectral radiance.

17 . The method of claim 16 , the first spectral radiance or the second spectral radiance is used with an eye tracking system of an artificial reality system.

18 . The method of claim 16 , wherein the first spectral radiance or the second spectral radiance to facilitate display by an artificial reality system.

19 . The method of claim 16 , wherein the first activation energy comprises electrical energy.

20 . The method of claim 16 , wherein the second activation energy comprises chemical particles.

Assignees

• Meta Platforms Inc

Inventors

• Bismuto Alfredo
• Leard Francis Lawrence
• Hallstein Sascha

Classifications

• H10F77/1433

  Quantum dots · CPC title

• H10F77/30

  Coatings (arrangements for preventing damage to photovoltaic cells caused by corpuscular radiation H10F77/80) · CPC title

• G02B27/0172 Primary

  characterised by optical features · CPC title

• G06F3/013

  Eye tracking input arrangements (G06F3/015 takes precedence) · CPC title

• G02B27/0093

  with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking · CPC title