LCOS_ The Technology for High Performance HDTV_ short.ppt

7/27/2019 LCOS_ The Technology for High Performance HDTV_ short.ppt

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LCOS - the Technology for

High Performance HDTV

R. L. Melcher

Chief Technology Officer

Brillian Corp.

[email protected]


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What is the LCOS Advantage?

It is not TVs on the wall

Its not cheaper HDTV products

LCoS provides the Perfect PictureNo com prom ise image quali ty

Like look ing out a window

Like being there!


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HDTV

Digital Bandw idth eff ic iency

PC/TV convergence

New appl icat ions

Format agnostic Inter laced/ pro gress ive

Mult i -resolut ion

Mult i -aspect rat io

Wide screen (16:9) Encourages larger sc reens

Technolog ical revolu t ion


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A Few Digital TV Formats

Format Columns Rows Aspect

Ratio

Frame

Rate (Hz)

Bit Rate

(Mbps)

1080p 1920 1080 16:9 60 1991

1080i 1920 1080 16:9 30 995

720p 1280 720 16:9 60 885

480p 704 480 16:9

(non-sqr)

60 324

480p 640 480 4:3 60 295


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format 4:3

area=1

format 16:

area=0.89

WideScreenFormatWideScreenFormat(smallerscreenforequivalent screendiagonal)(smallerscreenforequivalent screendiagonal)

diagonal=1

diagonal=1


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format 4:3

area=1

format 1

:

area=1.

WideScreenFormatWideScreenFormat

(largerscreenforequivalent screenheight)(largerscreenforequivalent screenheight)

diag.=1

diag.=1.22


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Frequency (cycle/deg.)

0

100

200

300

(after Infante, SID'93, Seminar F-6)

Contrast Sensitivity of the Eye

0 1 10 100

Res. = 0.3mRad


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3H16/9H

16.5 deg

Res. = 0.3mRad

-> 1920 horizontal pixels

How many Pixels Required to Achieve Eye Resolution?

1920p format requ ired


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Projection TV - Market Forecast

0

1,000

2,000

3,000

4,000

5,000

6,000

2004 2005 2006 2007 2008

Units

(000s)

iSuppli MD Mkt

iSuppli CRT Mkt

RPTVs dom inated by m icrodisplays in

2006 and beyond


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Microdisplays


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LCoS

Physical Size uncoupled from Image Size

The Magic of Microdisplays

Large, high resolution imageat low cost

Multiple applications withcompact size

Optics


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RPTV


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LCoS Microdisplay Technology

Glass

LiquidCrystal

SiliconCMOS

Leverage Two Major

Technologies:

Sil icon CMOS

Liqu id Crystal


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Electrode Mirrors8-12

CMOS Circuitry

LCoS Back Plane


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LCOS-Liquid Crystal On Silicon

Liquid Crystal

Glass Substrate

SourceGate

Drain Capacitor Diffusion

Capacitor Polysilicon

Silicon Substrate

First Metal

Second Metal

Third Metal

Alignment Layer

ITO Electrode


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LC Controls Polarization of Light


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Brillian LCOS Response Curve

1.E-05

1.E-04

1.E-03

1.E-02

1.E-01

1.E+00

0 0.5 1 1.5 2 2.5 3 3.5 4

Voltage

Brightness(normalized)

CR > 10 000:1


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Basic LCoSProjector

PBSProjection Lens

LCoS Device

Light Source

Video Signal

P&S

S

P

Condensing Lens


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3-Panel LCOS Light Engine

Integration Rod

Pre-polarizerArc Lamp

PBS

Projection Lens

LCOS Imagers

High brightness, High contrast

No video artifacts

No moving parts


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Brillian Cardon Light Engine


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Why does LCOS win?

Resolut ion

Color op t im izat ion

Grayscale opt im izat ion Absence of art ifacts associated w ith

co lor wheel, sc reen door effect ,

grayscale and co lor


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>2million pixelsin 0.7" device

Small Pixels enable high

Resolution at Low Cost


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Color

0.000

0.100

0.200

0.300

0.400

0.500

0.600

0.700

0.800

0.900

0.000 0.200 0.400 0.600 0.800x

y

ITU 709

D65Black Body

Spectral locus

Y

Y

X


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Input level

LightoutputBright

GammaBright

Area

Analog Pixels Provide

Optimal Gamma Correction

Dark

Low High

Dark Area


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Competition-DLP

Video artifacts

Color sequential

Digital grayscale Limited resolution

Sole source (TI)

Source: TI

DLP - Trademark of TI


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Competition-HTPS

Pixelated

Low contrast Motion smear

Sole source (Seiko

Epson)


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Gen II LCoS

Features

High aperture ratio (>92%)

Smoo th analog grayscale

Ful l co lor p alette

Small pixel geometry

True 1080p resolu t ion

Plus

Exceptional dark state perform anceHigher cont rast (Up to 4000:1)

Faster response time (~


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Brillian 1080p LCOS HDTV


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It is not the strongest of thespecies that survive, nor the

most intelligent, but the onesmost responsive to change

-Charles Darw in


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LCOS_ The Technology for High Performance HDTV_ short.ppt

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