Eye Tracking Power Management Using Ready Mode
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Solution Overview
Problem
Existing eye-tracking systems in personal computer devices face challenges in power management, leading to conflicts between low energy consumption and responsiveness, as they require time to warm up and provide accurate measurements, which hampers their integration into battery-powered systems without compromising energy efficiency.
Innovation Solution
Implementing an active, ready, and idle mode for eye-tracking equipment, where the ready mode operates at lower power to maintain partial data updates, reducing wake-up time and energy consumption, and allowing for efficient power management without compromising user interaction latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If eye-tracking equipment operates in active mode to provide accurate measurements, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The eye-tracking equipment implements dynamic operational modes (active, ready, idle) that allow the system to adapt its power consumption and measurement accuracy based on current operational needs. The equipment can transition between these modes to optimize the balance between precision and energy usage.
Solution Approach 2:
The ready mode performs preliminary actions by maintaining partial data updates and warming up the system in advance. This allows the eye-tracking equipment to transition quickly to accurate measurement mode without requiring a full warm-up period, thus reducing the time spent in high-power active mode.
2Measurement precision
If eye-tracking equipment transitions from idle to active mode, then measurement accuracy is improved, but wake-up time increases
Solution Approach 1:
The ready mode performs preliminary warming-up actions and maintains partial data updates before the system needs full operational accuracy. This preliminary action reduces the time required to transition from idle to active mode, as some processing and data structures are already prepared.
Solution Approach 2:
The operational states are segmented into three distinct modes (active, ready, idle) with different levels of processing intensity. The ready mode serves as an intermediate state that performs partial updates, allowing the system to progress toward full accuracy without immediately requiring complete active mode resources.
3Speed
If eye-tracking equipment operates continuously in active mode, then responsiveness to user interaction is improved, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts its operational state based on user presence and interaction patterns. By implementing ready and idle modes, the system can reduce power consumption during periods of low activity while maintaining the capability to quickly respond when user interaction is detected.
Solution Approach 2:
The system uses feedback from user presence detection and interaction patterns to determine appropriate operational modes. When user activity is detected, the system transitions to more responsive modes; when activity ceases, it transitions to lower-power modes, thus maintaining responsiveness only when needed.
Data Source
AI summary
An imaging device adapted to provide eye-tracking data by imaging at least one eye of a viewer, wherein: the imaging device is switchable between at least an active mode and a ready mode; the imaging device is configured, in the active mode, to use active eye illumination, which enables tracking of a corneal reflection, and to provide eye tracking data which include eye position and eye orientation; and the imaging device is configured, in the ready mode, to reduce an illumination intensity from a value the illumination intensity has in the active mode.