System and method for restoring color perception to the blind

Patent metadata

Field	Value
Publication number	US-12558545-B2
Application number	US-202118026443-A
Country	US
Kind code	B2
Filing date	Sep 24, 2021
Priority date	Sep 24, 2020
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A system and method are disclosed for causing or enhancing the perception of color in a blind or visually impaired person. The system may comprise: an electromagnetic stimulation device associated with the blind or visually impaired person; and a visualization device for receiving an image and detecting a color of an object in the image, wherein the electromagnetic stimulation device is configured to stimulate the blind or visually impaired person based on a parameter of electromagnetic stimulation that varies based on the color detected by the visualization device. The method may comprise: varying a parameter of electromagnetic stimulation of an electromagnetic stimulation device, associated with an eye of the blind or visually impaired person, based on which color is detected by a visualization device that is used in conjunction with the electromagnetic stimulation device; and stimulating the eye with the electromagnetic stimulation device according to the parameter of electromagnetic stimulation.

First claim

We claim:

1 . A method of causing or enhancing the perception of color, the method comprising:
varying a parameter of electromagnetic stimulation of an electromagnetic stimulation device based on which color is detected by a visualization device that is used in conjunction with the electromagnetic stimulation device; and stimulating a hearing pathway, a smell pathway, or a taste pathway of a blind or visually impaired person with the electromagnetic stimulation device according to the parameter of electromagnetic stimulation.

2 . The method of claim 1 , wherein varying the parameter of electromagnetic stimulation further comprises controlling the variation of the parameter of electromagnetic stimulation via a wireless signal to the electromagnetic stimulation device.

3 . The method of claim 2 , wherein the wireless signal is provided in response to what is detected by the visualization device wherein the wireless signal is one of: a radio frequency signal and an optical signal.

4 . The method of claim 1 , wherein the parameter of electromagnetic stimulation is a frequency of stimulation, and wherein varying the parameter of electromagnetic stimulation of the electromagnetic stimulation device comprises frequency modulation of stimulation of the electromagnetic stimulation device.

5 . The method of claim 4 , further comprising personalized tuning of the parameter of electromagnetic stimulation, such that the frequency of stimulation provides optimal perception of a color detected by the visualization device for each individual blind or visually impaired person.

6 . The method of claim 5 , comprising:
showing the blind or visually impaired person a known color; optimizing a preferred frequency of stimulation by repeating the process of:
setting the frequency of stimulation to a first frequency;
setting the frequency of stimulation to a second frequency;
obtaining feedback from the blind or visually impaired person as to which of the first frequency and the second frequency caused better perception of the known color, and using the feedback to set a preferred frequency; and
setting the frequency of stimulation at the preferred frequency.

7 . The method of claim 5 , comprising:
tuning a first preferred frequency for a first color, based on a first known color, to an optimal frequency for an individual to perceive the first known color; saving the first preferred frequency for the first color; tuning a second preferred frequency for a second color, based on a second known color, to an optimal frequency for the individual to perceive the second known color; saving the second preferred frequency for the second color; and varying the frequency of stimulation of the electromagnetic stimulation device based on the saved first preferred frequency when the first color is viewed by the visualization device, and based on the saved second preferred frequency when the second color is viewed by the visualization device.

8 . The method of claim 4 , wherein the frequency of stimulation is in the range of 15 Hz to 25 Hz for the color yellow, and wherein the frequency of stimulation is in the range of 60 to 120 Hz for the color blue.

9 . The method of claim 1 , wherein the stimulating is through electrodes connected with an ear or an acoustic nerve.

10 . The method of claim 1 , wherein the stimulating is through electrodes connected with a nose.

11 . The method of claim 1 , wherein the stimulating is through electrodes connected with a mouth or a tongue.

Assignees

• Univ Southern California

Inventors

• Humayun Mark S
• Yue Lan

Classifications

• A61N1/37217

  characterised by the communication link, e.g. acoustic or tactile · CPC title

• A61N1/36196

  Frequency modulation · CPC title

• A61N1/0543

  Retinal electrodes · CPC title

• A61F9/08 Primary

  Devices or methods enabling eye-patients to replace direct visual perception by another kind of perception · CPC title

• G09B21/008

  using visual presentation of the information for the partially sighted · CPC title