AR/VR Display Power Control Using Eye-Tracking Blink Detection

Solution Overview

Problem

Existing augmented and virtual reality systems face challenges in efficiently managing power consumption, particularly during periods when the user is unable to see, such as during blinking or saccades, leading to unnecessary current drain.

Innovation Solution

Implementing an inward-facing sensor, such as an eye-tracking camera, to detect changes in the user's eye status, and adjusting the display system's power consumption by dimming or turning off the light source, skipping frames, or reducing the refresh rate based on detected eye movements like blinking or saccades.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the display operates continuously at full brightness and refresh rate, then the user experiences high visual quality and responsiveness, but the power consumption increases significantly

Engineering Contradiction:

Improvepower consumptionVSAvoidvisual quality

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The display system dynamically adjusts its operating parameters (brightness, refresh rate) based on real-time eye state detection. When the user is not looking at the display, the system reduces brightness and/or refresh rate to lower power consumption. When the user looks at the display, the system restores full brightness and refresh rate to maintain visual quality. This dynamic adaptation resolves the contradiction by making the display characteristics variable rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses an eye-tracking sensor to continuously monitor the user's eye position and state, providing feedback to the display controller. Based on this feedback, the controller adjusts display parameters in real-time. The feedback loop ensures that power consumption is reduced when the user is not viewing, while visual quality is maintained when the user is viewing, thus resolving the contradiction between these two opposing requirements.

Inventive Principle:

Principle #23Feedback

2Use of energy by moving object

If the display reduces brightness and refresh rate to save power, then energy consumption decreases, but the visual quality and responsiveness deteriorate

Engineering Contradiction:

Improvepower consumptionVSAvoidvisual quality

Core Design Contradiction:

Use of energy by moving objectVSProductivity

Solution Approach 1:

The display system dynamically adjusts its operating parameters (brightness, refresh rate) based on real-time eye state detection. When the user is not looking at the display, the system reduces brightness and/or refresh rate to lower power consumption. When the user looks at the display, the system restores full brightness and refresh rate to maintain visual quality. This dynamic adaptation resolves the contradiction by making the display characteristics variable rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses an eye-tracking sensor to continuously monitor the user's eye position and state, providing feedback to the display controller. Based on this feedback, the controller adjusts display parameters in real-time. The feedback loop ensures that power consumption is reduced when the user is not viewing, while visual quality is maintained when the user is viewing, thus resolving the contradiction between these two opposing requirements.

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If the system continuously monitors eye status to optimize power management, then energy efficiency improves, but the device complexity increases

Engineering Contradiction:

Improveenergy efficiencyVSAvoidsystem complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The eye-tracking sensor serves multiple functions: it monitors eye position for display optimization, detects eye state for power management, and can provide input for interaction modes. By making the sensor multi-functional, the system achieves improved energy efficiency through continuous monitoring without proportionally increasing device complexity, as the same hardware component serves multiple purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses the eye-tracking data to automatically control display parameters and power consumption without requiring additional complex control mechanisms. The eye state itself serves as the control signal, allowing the system to self-regulate based on user behavior. This self-service approach improves energy efficiency while avoiding the need for additional complex user input interfaces or control systems.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12632108B2Current drain reduction in AR/VR display systems

Publication Date: 2026.05.19 MAGIC LEAP INC

AI summary

In some embodiments, eye tracking is used on an AR or VR display system to determine if a user of the display system is blinking or otherwise cannot see. In response, current drain or power usage of a display associated with the display system may be reduced, for example, by dimming or turning off a light source associated with the display, or by configuring a graphics driver to skip a designated number of frames or reduce a refresh rate for a designated period of time.