JVC DLA-RS15U - Reference Series Home Cinema... Guide d'installation

High Performance

Stereoscopic Methods for 3-D

Viewing using DILA Projectors

Rod Sterling

JVC North America R&D Center

www.jvcdig.com

3AUG2005 Rod Sterling Siggraph2005 2

Agenda

• Requirements for Stereoscopic Viewing

• Types of Stereoscopic projection

• Advantages of each type

• Efficiency of each type

• JVC Stereoscopic Projection Systems

• Credit and thanks

3AUG2005 Rod Sterling Siggraph2005 3

Key to Stereoscopic viewing

• The key to any 3-D system, is of course,

“CONTENT”, but the projection system

should enhance the content, not add

artifacts to take away from the true

experience.

• True 3-D effect requires high fidelity to

“fool” your brain into thinking the image is

three dimensional.

3AUG2005 Rod Sterling Siggraph2005 4

3-D Stereoscopic Projection

High Fidelity Viewing Requirements

• Key requirements

– Lack of projector added artifacts

• Pixel structure

• Video noise

• Flashing due to frame rate

• Black level

• Brightness

• Color

3AUG2005 Rod Sterling Siggraph2005 5

3-D Stereoscopic Projection

• Key requirements

– Good left/right eye extinction ratio

• Should be >100:1

– Optical quality screen

• Front or rear, low gain,

– Easy to wear glasses

• Light weight

• Easy to see through

• Feel like not there

• Large field of view

3AUG2005 Rod Sterling Siggraph2005 6

Types of Stereographic Projection

•Active

– May be one or two projectors

– Requires synchronous shutter glasses

• Passive

– Maybe one or two projectors

– Polarization type

•Circular

•Linear

– Anaglyphic

• Simple Red/Blue

•Infitec

3AUG2005 Rod Sterling Siggraph2005 7

Active System

• One projector approach

– Requires 2x frame rates >120Hz

– Frame double to eyes

• Active glasses each person

• LC Shutter on projector

• Two projector approach

– Fakespace Beacon system

• Duty cycle <50% for each system

• Non-polarizing screen required

3AUG2005 Rod Sterling Siggraph2005 8

Passive System

• Polarization types

– Linear – high extinction ratio, head movement

dependant

– Circular – lower extinction ratio, head

movement invariant

• Anaglyphic type

– Infitec® - Highest extinction ratio, head

movement invariant, screen independent

3AUG2005 Rod Sterling Siggraph2005 9

Advantages of each Method

Method Ext Ratio Head

movement Screen Glasses

Cost other

Active >100:1 invariant Invariant high batteries

Passive

Linear >250:1 Strong Polarizing

Required Low

Passive

Circular >100:1 Invariant Polarizing

Required Mid High

Efficiency

Passive

Infitec®>1000:1 Invariant Invariant Mid Need

color

correction

3AUG2005 Rod Sterling Siggraph2005 10

3-D Efficiencies and Crosstalk

Transmission Crosstalk

method Electronic /

timing Filter glasses net eff CR extinction

Ratio

Active

single CRT or DLP 0.45 0.55 0.65 0.16

2 DILA (beacon) 0.45 0.9 0.65 0.26

Passive

2 CRT or DLP-Polarization 1 0.45 0.84 0.38

2 CRT or DLP-Infitec 0.66 0.45 0.9 0.27

2 LCD Polarization 1 0.7 0.84 0.59

2 DILA-circular 1 0.7 0.84 0.59 50 0.0200

2 DILA-circular ColorLink 1 1.05 0.86 0.90 120 0.0083

2 DILA-linear 1 0.88983 0.73 0.65 250 0.0040

2 DILA-Infitec®0.7 0.45 0.85 0.27 1000 0.0010

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