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  9. JVC DLA-RS15U - Reference Series Home Cinema... Installation guide

JVC DLA-RS15U - Reference Series Home Cinema... Installation guide

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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