Stereo Glasses Shutter Control for LCD Ghosting

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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

Implementing a system to control stereo glasses shutters such that they remain closed during the overlap of image transitions, and extending the vertical blanking interval to ensure each eye only receives its intended image, enhancing the stereo viewing experience by preventing unintended image content from being viewed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If time sequential stereo viewing is implemented on LCDs, then stereo viewing capability is achieved, but ghosting occurs due to slow pixel response time

Engineering Contradiction:

Improvestereo viewing capabilityVSAvoidimage accuracy

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent extends the vertical blanking interval to occur before the pixel response time is complete, ensuring that the display medium has fully transitioned from displaying one eye's image to the other eye's image before the next image begins to be displayed. This preliminary timing adjustment prevents ghosting by ensuring complete image transition before switching shutters.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If LCD pixels retain previous images until updated, then capacitive storage function is maintained, but each eye receives unintended image content

Engineering Contradiction:

Improvecapacitive storage functionVSAvoidcross-eye image interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by extending the vertical blanking interval to occur before the pixel transition is complete. This timing adjustment prevents the harmful effect of cross-eye image interference by ensuring that the display medium has fully transitioned from one image to the next before the shutters switch, thereby preventing unintended image content from reaching the wrong eye.

Inventive Principle:

Principle #9Preliminary anti-action

3Duration of action of moving object

If shutters are switched immediately after image transmission, then viewing time is maximized, but unintended image content is displayed during transition

Engineering Contradiction:

Improveshutter open durationVSAvoidimage purity

Core Design Contradiction:

Duration of action of moving objectVSLoss of information

Solution Approach 1:

The patent extends the vertical blanking interval to occur before the pixel response time is complete, ensuring that the display medium has fully transitioned from one image to the next before the shutters switch. This preliminary timing adjustment prevents ghosting and image contamination while maintaining optimal shutter open duration for clear stereo viewing.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8581833B2System, method, and computer program product for controlling stereo glasses shutters

Publication Date: 2013.11.12 NVIDIA CORP

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.