Eye-Tracking Scan Driver for Latency Reduction in Mobile Displays
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Solution Overview
Problem
Users of glasses-type mobile terminals, such as smart glasses or head-mounted displays, often experience dizziness due to latency in image updates corresponding to their head movements, as the current systems take time to adjust the displayed image to match the user's changing viewpoint.
Innovation Solution
A mobile terminal with a display unit comprising a display panel, a scan driver, and an eye detecting sensor, where the scan driver supplies scanning signals based on the user's eye position detected by the eye detecting sensor, allowing for real-time adjustment of the image display to match the user's motion and gaze, thereby reducing latency and dizziness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the scan driver supplies scanning signals from all stages sequentially, then the complete image can be displayed, but the display time increases causing latency and dizziness
Solution Approach 1:
The system performs preliminary action by detecting the user's eye position before completing the full image rendering process. The scan driver then prioritizes updating only the regions corresponding to the detected eye position, allowing critical visual information to be displayed faster while reducing overall display time and latency.
Solution Approach 2:
Instead of uniformly updating the entire display panel, the system applies local quality by identifying and prioritizing updates for specific regions corresponding to the user's eye position. The scan driver supplies scanning signals preferentially to these identified regions, ensuring high-quality visual feedback where the user is looking while reducing updates in other areas.
2Reliability
If the system updates the entire display panel, then all image information is provided, but the latency causes dizziness
Solution Approach 1:
The system implements feedback by continuously detecting the user's eye position and using this information to dynamically adjust the scanning signal supply. This closed-loop feedback mechanism ensures that the display updates are synchronized with the user's actual viewing direction, improving visual stability and reducing latency-induced dizziness.
Solution Approach 2:
The system applies dynamics by making the scanning signal supply adaptive rather than static. The scan driver dynamically adjusts which regions receive scanning signals based on real-time eye position detection, allowing the display system to respond flexibly to changing user gaze patterns and maintain visual stability during head movements.
3Ease of operation
If the scan driver supplies scanning signals from all stages, then the full image is rendered, but the time required increases reducing responsiveness
Solution Approach 1:
The system extracts and prioritizes the most critical portions of the image for display by identifying regions corresponding to the user's eye position. Instead of rendering the entire image uniformly, the scan driver extracts and supplies scanning signals only to these prioritized regions, significantly reducing the time required to display relevant visual information and improving responsiveness to user motion.
Data Source
AI summary
A mobile terminal according to an exemplary embodiment includes: a display unit including a display panel including a plurality of pixels, a scan driver including a plurality of stages connected to at least one of the plurality of pixels and supplying a scanning signal, and a data driver configured to supply a data voltage to the plurality of pixels; an eye detecting sensor configured to detect an eye position of a user with respect to the display panel; and a controller configured to generate a control signal that controls the display unit and outputting the control signal, wherein the scan driver is configured to supply a scanning signal from a stage corresponding to one region of the display panel where the eye of the user is directed.