Stereo Glasses Shutter Control for LCD Ghosting Reduction
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Solution Overview
Problem
Time sequential stereo viewing experiences issues with liquid crystal displays (LCDs) due to slow pixel response times, causing 'ghosting' and improper image presentation, as LCDs retain previous images until updated, leading to each eye receiving content intended for the other eye.
Innovation Solution
A system and method for controlling stereo glasses shutters to remain closed during the overlap of image transitions, and increasing the vertical blanking interval to ensure each eye receives only its intended content, enhancing the stereo viewing experience by preventing unintended image overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time sequential stereo viewing is used with LCD displays, then stereo content can be displayed, but slow pixel response times cause ghosting and image retention issues
Solution Approach 1:
The system performs preliminary actions by extending the vertical blanking interval and coordinating shutter closures before image transitions occur. This prevents ghosting by ensuring both shutters are closed during the transition period, eliminating the harmful overlap of left and right eye images that occurs with standard LCD response times.
Solution Approach 2:
The patent introduces an intermediary control mechanism that coordinates between the display system and stereo glasses shutters. By controlling the shutters to remain closed during vertical blanking intervals and image transitions, this intermediary system prevents the direct harmful interaction between slow LCD pixel response and stereo image separation.
2Productivity
If standard vertical blanking interval is used, then display refresh occurs, but image overlap occurs during transition causing each eye to receive unintended content
Solution Approach 1:
The system extends the vertical blanking interval as a preliminary action before image transitions. This extended interval ensures that both shutters remain closed during the entire transition period, preventing any unintended image content from reaching either eye during the refresh cycle.
Solution Approach 2:
The patent rushes through the transition period by keeping both shutters closed during the extended vertical blanking interval. This skipping of the transition period prevents image overlap, allowing the display to maintain high refresh rates while ensuring complete image separation during critical transition moments.
3Ease of operation
If shutter timing is synchronized with standard LCD refresh, then display operation is maintained, but ghosting occurs due to pixel retention
Solution Approach 1:
The system applies preliminary anti-action by extending the vertical blanking interval and coordinating shutter closures to occur during image transitions. This counteracts the ghosting effect caused by slow pixel response times, allowing standard LCD refresh operation to continue while eliminating the harmful ghosting artifact.
Data Source
AI summary
A system, method, and computer program product are provided for controlling stereo glasses shutters. In use, a right eye shutter of stereo glasses is controlled to switch between a closed orientation and an open orientation. Further, a left eye shutter of the stereo glasses is controlled to switch between the closed orientation and the open orientation. To this end, the right eye shutter and the left eye shutter of the stereo glasses may be controlled such that the right eye shutter and the left eye shutter simultaneously remain in the closed orientation for a predetermined amount of time.