OCB Liquid Crystal Shutter Glasses for 3D Crosstalk Reduction

Solution Overview

Problem

Viewers experience fatigue and discomfort when using stereoscopic liquid crystal shutter glasses due to slow response times and poor angle of sight characteristics of the liquid crystal shutters, leading to 3D crosstalk and discomfort during stereoscopic image viewing.

Innovation Solution

The stereoscopic liquid crystal shutter glasses are designed with left-eye and right-eye shutters that have a response time of no more than 5 milliseconds and a contrast ratio of at least 350:1 at 30 degrees, utilizing OCB liquid crystal technology and specific optical compensation devices to optimize response time and angle of sight characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional liquid crystal shutters are used in stereoscopic glasses, then the structure is simple and easy to manufacture, but the response time is slow and angle of sight characteristics are poor, causing 3D crosstalk and viewer discomfort

Engineering Contradiction:

Improveresponse timeVSAvoid3D crosstalk and viewer discomfort

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent changes the liquid crystal mode from conventional TN or VA to OCB (Optically Compensated Bend) mode, which fundamentally alters the molecular alignment and switching characteristics. This parameter change achieves response time of 5ms or less while maintaining excellent angle of sight characteristics and suppressing 3D crosstalk, directly resolving the contradiction between speed and harmful factors

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite optical compensation structure including positive uniaxial optical compensation film and negative uniaxial optical compensation film with specific retardation values. This composite material approach compensates for the liquid crystal's optical anisotropy across different viewing angles, eliminating 3D crosstalk while maintaining fast response characteristics

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If conventional liquid crystal shutters are used, then manufacturing is easier, but angle of sight characteristics are poor leading to image quality degradation

Engineering Contradiction:

Improveoptical switching precisionVSAvoidangle of sight limitations

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The patent changes the liquid crystal mode from conventional TN or VA to OCB (Optically Compensated Bend) mode, which fundamentally alters the molecular alignment and switching characteristics. This parameter change achieves response time of 5ms or less while maintaining excellent angle of sight characteristics and suppressing 3D crosstalk, directly resolving the contradiction between speed and harmful factors

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite optical compensation structure including positive uniaxial optical compensation film and negative uniaxial optical compensation film with specific retardation values. This composite material approach compensates for the liquid crystal's optical anisotropy across different viewing angles, eliminating 3D crosstalk while maintaining fast response characteristics

Inventive Principle:

Principle #40Composite materials

3Speed

If faster response time is achieved, then 3D crosstalk is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improveresponse timeVSAvoidliquid crystal shutter structure

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent changes the liquid crystal mode from conventional TN or VA to OCB (Optically Compensated Bend) mode, which fundamentally alters the molecular alignment and switching characteristics. This parameter change achieves response time of 5ms or less while maintaining excellent angle of sight characteristics and suppressing 3D crosstalk, directly resolving the contradiction between speed and harmful factors

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This design effectively suppresses fatigue and discomfort, allowing for comfortable stereoscopic image viewing by minimizing 3D crosstalk and ensuring favorable optical switching characteristics across various angles of sight.

Implementation Method 1

liquid crystal, which has been widely applied in display devices, has a function whereby a light transmitting property can be controlled by electric signals

Methodology Applied

Scientific EffectLiquid crystal electric-optic effect: Electro-Optic Effects

Implementation Method 2

utilizing OCB liquid crystal technology and specific optical compensation devices to optimize response time and angle of sight characteristics

Methodology Applied

Scientific EffectOptically compensated bend (OCB) liquid crystal alignment: Liquid Crystals

Data Source

PatentUS8648898B2Stereoscopic liquid crystal shutter glasses and stereoscopic image display system

Publication Date: 2014.02.11 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, stereoscopic liquid crystal shutter glasses include a left-eye liquid crystal shutter and a right-eye liquid crystal shutter. Each of the left-eye liquid crystal shutter and the right-eye liquid crystal shutter has a response time not more than 5 milliseconds. Each of the left-eye liquid crystal shutter and the right-eye liquid crystal shutter has a contrast ratio not less than 350:1. The contrast ratio is a value at an angle of sight of 30 degrees in left direction and in right direction.