3D2010_Pres - Liquid Crystal Shutter Glasses Presented by Kara Burlinski Tony Greif Heather Pease Sam Spitz Agenda Progression of 3-D technology

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Liquid Crystal Shutter Glasses Presented by: Kara Burlinski, Tony Greif, Heather Pease, & Sam Spitz
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Agenda • Progression of 3-D technology • Overview of LC Shutter Glasses • Electrical Components • Sources of Defects • Societal Applications
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PROGRESSION OF 3D TECHNOLOGY 1838-Present
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Progression of 3-D Technology • 1838: Invention of 3-D glasses by Charles Wheatstone • 1893: 3-D motion pictures developed by Wiliam Friese-Green • 1922: Power of Love • Mid-1980s: Combination of 3-D & IMAX technologies • 2010: Release of DVDs for at home, 3-D experiences with the use of LC Shutter Glasses
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OVERVIEW OF LC SHUTTER GLASSES What do the glasses do?
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LC Shutter Glasses 12
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Overview of LC Shutter Glasses • Battery-powered glasses that work in conjunction with 3D televisions and screens
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Overview of LC Shutter Glasses • Simulate 3-dimensional images using a form of stereoscopy called alternative- frame sequencing – Special imaging that enhances depth perception
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Overview of LC Shutter Glasses • Alternative-frame sequencing – Movie is filmed with two cameras/model is generated with two angles (one left eye, one right eye) – Frames from two sets of film are alternatively sequenced onto one – Radio signals from TV/screen direct glasses when to “open” each eye (happens in sequence with refresh rate – discussed later)
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ELECTRICAL COMPONENTS How do the glasses work?
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Electrical Components Main circuitry we are concerned with
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Electrical Components • Block diagram of circuitry in glasses
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Circuit diagram of circuitry in signal receiver
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Electrical Components • Block diagram of circuitry in glasses
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Multiplexers in Lens Driver System
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Electrical/Material Components •Liquid Crystal Shutters driven by AC power •DC power allows ionic build up, destroying crystals •Utilizes square wave forms •Alternates between positive and negative to remove DC current from glass panels •Voltage between 3V-8V based on brand
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Electrical/Material Components •Frequency of 30Hz •Voltage applied for 16.7msec •Negative voltage applied for 16.7 msec •Zero voltage applied
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Electrical/Material Components •Liquid crystals placed between two plates •Voltage applied causes liquid crystals to uncoil and allow light through •Lack of voltage causes crystals to revert to original coil
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Electrical/Material Components- Effects of Voltage Application
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This note was uploaded on 01/24/2012 for the course ECE 317 taught by Professor Peck,t during the Spring '08 term at University of Illinois, Urbana Champaign.

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3D2010_Pres - Liquid Crystal Shutter Glasses Presented by Kara Burlinski Tony Greif Heather Pease Sam Spitz Agenda Progression of 3-D technology

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