Gaze-Driven Luminance Segmentation for Projector Power Management
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Solution Overview
Problem
Portable electronic devices face challenges in managing power consumption when projecting images, especially in situations where a wired power supply is not immediately available. Lowering the luminance of projected images can conserve power but may interfere with the user's viewing experience.
Innovation Solution
An electronic device equipped with a projector, sensors, and a processor that identifies a user's gaze and dynamically adjusts the luminance of specific regions of a projected image. The device divides the projection image into regions corresponding to the user's gaze and other areas, applying different luminance values to optimize power usage while maintaining a good viewing experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the luminance value of the entire projected image is lowered to save power, then power consumption is reduced, but the user's viewing experience is interfered with
Solution Approach 1:
The patent divides the projected image into multiple regions (first image region corresponding to user gaze and second image region as remaining region) and applies different luminance values to each region. This segmentation allows the system to maintain high luminance only where needed (user gaze area) while reducing luminance in other areas, thus resolving the contradiction between power saving and viewing experience.
Solution Approach 2:
The patent implements local quality by modifying the projection image to include the first image region of a first luminance value and the second image region of a second luminance value different from the first. This allows different parts of the image to have different luminance characteristics, enabling power optimization without compromising the user's viewing experience in the critical gaze area.
2Loss of energy
If the luminance value of the entire projected image is lowered to save power, then energy efficiency is improved, but image quality for the user is degraded
Solution Approach 1:
The patent segments the image into regions and applies different luminance values accordingly. The first image region (user gaze area) maintains higher luminance for good image quality, while the second image region uses lower luminance to reduce energy consumption, thus resolving the contradiction between energy efficiency and image luminance quality.
Solution Approach 2:
The patent applies local quality by setting different luminance values for different image regions. The first image region corresponding to user gaze maintains high luminance for optimal image quality, while other regions use reduced luminance to minimize energy loss, achieving a balance between energy efficiency and image quality where it matters most.
Data Source
AI summary
An electronic device may include: a projector; at least one sensor; at least one processor; memory storing instructions that, when executed by the at least one processor, cause the at least one processor to: identify a user gaze based on first sensing data obtained through the at least one sensor; divide a projection image stored in the memory into a first image region corresponding to the user gaze and a second image region which is a remaining region other than the first image region; modify the projection image to include the first image region of a first luminance value and the second image region of a second luminance value different from the first luminance value; and control the projector to project the modified projection image.