Multi-view Display Shutter Synchronization for Flicker Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current multi-view display systems, particularly 3D displays using shutter glasses, face limitations in response time and flickering, leading to suboptimal image quality and user experience due to conflicting requirements between image frame rate and shutter frequency.
Innovation Solution
A multi-view display system with a display controller and shutter device that operates at different frequencies, where the shutter frame rate is higher than the view frame rate, reducing perceived flickering by synchronizing shutter and display modes to minimize cross-talk and allow for higher brightness and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the image frame rate is increased to reduce flickering, then the perceived flickering is reduced, but the pixel response time becomes insufficient leading to image distortion and quality degradation
Solution Approach 1:
The patent applies periodic action by using a backlight that scans or activates in periodic intervals synchronized with the shutter glasses. The backlight remains off during pixel transition periods and activates only during stable display periods, creating a periodic on-off pattern that allows high frame rates without requiring pixels to respond faster than their physical capabilities.
Solution Approach 2:
The patent implements preliminary action by pre-positioning the backlight in the off state during pixel transition periods before the actual image display begins. This preliminary timing arrangement ensures that pixels have sufficient time to stabilize before the backlight activates, preventing image distortion while maintaining high frame rates.
2Speed
If the shutter frame rate is increased to reduce flickering, then the perceived flickering is reduced, but the system complexity and synchronization requirements increase
Solution Approach 1:
The patent merges the backlight control function with the existing shutter glasses synchronization mechanism. By coordinating the backlight scanning/activation with the shutter frame rate, the system achieves reduced flickering without adding independent control systems, thereby minimizing additional complexity while maintaining high shutter frame rates.
3Manufacturing precision
If the pixel response time is extended to improve image quality, then image distortion is reduced, but the maximum achievable frame rate decreases leading to increased flickering
Solution Approach 1:
The patent uses periodic backlight activation that aligns with the pixel response characteristics. The backlight remains off during the pixel transition period and activates only after pixels have stabilized, creating a periodic pattern that allows slower pixel response times to be compatible with high frame rates, thereby eliminating the need to choose between image quality and frame rate.
Data Source
AI summary
A multi-view display system comprises a display controller (307) which controls a display (301) to display a sequence of multi-view images in repeating view frames. A shutter device (311), such as shutter glasses, comprises at least two shutter elements arranged to switch between an open shutter mode and a less transparent closed shutter mode. Each shutter element is associated with a view of the plurality of views. A shutter driver (309) controls the shutter elements in repeating shutter frames (413) having a shutter time slot for each of the shutter elements. The shutter elements are in the open shutter mode during an allocated shutter time slot and otherwise in the closed shutter mode. The shutter frame rate of the repeating shutter frames is higher than a view frame rate of the repeating view frames. The invention may reduce flicker while maintaining a low frame rate, e.g. for 3D displays.