Gaze-Partitioned Display Scanning for Lower Power and Motion Sickness
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Solution Overview
Problem
Conventional VR/AR devices face challenges in high power consumption and motion sickness due to inconsistent user movement and screen movement, exacerbated by driving the display device at high frame rates regardless of user movement.
Innovation Solution
A display device that adjusts scan times based on user gaze and field-of-view areas, dividing the display panel into main and peripheral areas and applying different scan times to reduce power consumption and align image output with user movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display device is driven at high frame rate (e.g., 120 Hz) regardless of user movement, then motion sickness and motion blur are reduced, but power consumption increases excessively
Solution Approach 1:
The patent applies dynamics by making the frame rate adaptive rather than fixed. The display device dynamically adjusts the frame rate based on real-time detection of user movement through sensors (accelerometer, gyroscope). When user movement is detected, the frame rate increases to reduce motion sickness; when movement is minimal, the frame rate decreases to save power. This dynamic adjustment resolves the contradiction between maintaining high reliability and reducing energy consumption.
Solution Approach 2:
The patent changes the operational parameter (frame rate) based on user movement conditions. By monitoring movement parameters through sensors and adjusting the display refresh rate accordingly, the system optimizes the balance between motion sickness reduction and power consumption. The frame rate parameter is modified from a static high value to a dynamic value that responds to user behavior.
2Reliability
If the display device is driven at high frame rate continuously, then image quality and user immersion are improved, but implementation difficulty increases due to physical RC delay
Solution Approach 1:
The system dynamically adjusts frame rate based on actual user movement needs rather than maintaining a continuously high frame rate. This reduces the demand on hardware response capabilities and minimizes the impact of physical RC delays in the display system, making high-quality immersive experience more achievable with current technology constraints.
3Ease of manufacture
If the display device operates at fixed frame rate, then implementation is simpler, but power consumption increases and motion sickness is not adequately reduced
Solution Approach 1:
The patent implements a feedback mechanism where sensors continuously monitor user movement and provide this information to the control system. The system then adjusts the frame rate based on this feedback, creating a closed-loop control system. This approach maintains implementation simplicity while enabling adaptive power consumption management and motion sickness reduction.
Data Source
AI summary
A display device according to an embodiment of the disclosure may comprise a display panel displaying an input image on a screen, a user gaze determiner determining a user gaze on the display panel based on a sensor value obtained from a motion sensor, an area divider dividing the display panel into the user's main field-of-view area, peripheral field-of-view area, and outer area based on the determined user gaze, a scan time determiner determining scan times of scan signals corresponding to the main field-of-view area and the peripheral field-of-view area, and a data driver applying a data voltage to the display panel according to the determined scan time.