Wearable device, method, and non-transitory computer readable storage medium controlling light radiation of light source

A method performed by a wearable device comprising a plurality of light sources and a camera, the method comprising:

• performing, by the wearable device, eye tracking based on images captured by the camera while the plurality of the light sources are controlled to emit light toward an eye of a user;
• performing, by the wearable device, iris recognition based on at least one image captured by the camera while a first portion of the plurality of the light sources is controlled to emit light toward the eye of the user and a first remaining portion of the plurality of the light sources is deactivated;
• in response to the iris recognition failing based on the at least one image, selecting a second portion of the plurality of the light sources;
• and
• performing the iris recognition based on at least one other image captured by the camera while the second portion of the plurality of the light sources is controlled to emit light toward the eye of the user and a second remaining portion of the plurality of the light sources is deactivated,
• wherein the first portion of the plurality of the light sources is arranged closer to the camera than the second portion of the plurality of the light sources,
• wherein the plurality of light sources is arranged in output channels of a light source driver comprising circuitry of the wearable device,
• wherein the first portion of the plurality of the light sources is arranged in a first output channel of the output channels, and
• wherein the second portion of the plurality of the light sources is arranged in a second output channel of the output channels.

A non-transitory computer-readable storage medium storing one or more computer programs including instructions that, when executed by at least one processor individually or collectively of a wearable device comprising a plurality of light sources and a camera, cause the wearable device to:

• perform, eye tracking based on images captured by the camera while the plurality of the light sources are controlled to emit light toward an eye of a user;
• perform, iris recognition based on at least one image captured by the camera while a first portion of the plurality of the light sources is controlled to emit light toward the eye of the user and a first remaining portion of the plurality of the light sources is deactivated;
• in response to the iris recognition failing based on the at least one image, selecting a second portion of the plurality of the light sources;
• and
• performing the iris recognition based on at least one other image captured by the camera while the second portion of the plurality of the light sources is controlled to emit light toward the eye of the user and a second remaining portion of the plurality of the light sources is deactivated,
• wherein the first portion of the plurality of the light sources is arranged closer to the camera than the second portion of the plurality of the light sources,
• wherein the plurality of light sources is arranged in output channels of a light source driver comprising circuitry of the wearable device,
• wherein the first portion of the plurality of the light sources is arranged in a first output channel of the output channels, and
• wherein the second portion of the plurality of the light sources is arranged in a second output channel of the output channels.