interferometric modulator display

1ÉC OLE POL Y TEC H NIQU EFÉ DÉRALE D E LA USANNE

Nanotech Project 2008 / Phase 2Project:Team:

Interferometric Modulator Display

ACCOTO CelsoADHAM Mohamed

LARRIEU JeanCharles

LE GROS ChristopheMAQUEDA LÓPEZ Mariazel OTTONELLO BRIANO Floria

PIZZATO DanielSADRINI Jury

Team Members:



Outline

1. Market Analysis2. Building Blocks3. Architecture/Materials4. Product Specifications5. Time schedule (Gantt diagram)6. Conclusions



Market Evolution



Power Gap in Nowadays Market



IMOD Position in Display Market



System block diagram

Embodiment of an electronic device incorporating a 3x3 interferometric

modulator display.

Two adjacent interferometric modulators



Block Diagram illustrating an embodiment of a visual Display

Device

TPS65131 microcontroller:

• adapted for small to medium size displays

• output voltage up to 15V and negative output voltage down to -15V

• compatible with a Li-ion battery

System block diagram



Basic Architecture of an IMOD

M. Mitchell Waldrop, “Brilliant Displays”Cheng-Yao Lo et al., “MEMS-Controlled Paper-Like Transmissive Flexible Display”Jeffrey B. Sampsell, “MEMS-Based Display Technology Drives Next-Generation FPDs for Mobile Apps.”




Substrate

GLASS





Reflective surfaces

PEN





Electrodes

ITO, Al, Au, Ag, MoCr

Mark W. Miles, “Toward an iMoD ecosystem”




Posts

GLASS, SiO₂





Photonic CrystalsParallax 3D

André C. Arsenault et al., “Photonic-crystal full-colour displays”



Specifications

LCD OLED IMoD

Switching Speed [ms]

2-20 0.001 10

Power Consumption

315 401 23

Efficiency <50% - 85%

Resolution [ppi] 326 235 223

Number of colors 262 k 262 k 2^n or n+1

Size 9” 7” 5.7”



Specifications

• Parameters that are not yet estimated• Driving Voltage• Cost• Contrast• Weight• Lifetime



Conclusion

• The market seems to be very attractive.

• The fundamental blocks of the display are defined.

• The overall tasks are assigned to the different work

groups.

• Some improvements are under study.



Thank you for the attention!!!



Exemples: switching speed

Each pixel lit per 17 ms (20 Europe) before been redrawn

• LCD : 20 ms in year 2000 (useless for video apps) 2 ms modern displays.• CRT : < 1ms.• OLED : 0.001 ms.• Plasma : 0.001 ms.

• Techniques to increase the switcing speed:• Boost the driving voltage• Super sampling : built intermediate frames



Exemples: cost & resolution & weight

Cost:• OLED : ~ $24,000 per square meter • LCD : ~ $800 per square meter

• Resolution: • Iphone : 362 ppi• Mirasol IMOD : 223 ppi• Ipad : 132 ppi

• Weight : • Ipad : 132 g for 241x185mm



Exemples: Contrast & driving voltageContrast: ratio of the luminance of the brightest color (white) to

that of the darkest color (black) • LCD : 5000 : 1 Dynamic (underpower backlight)

1000 : 1 Static• CRT : >3000 : 1 Static• Plasma : 5000 : 1 Static• OLED : 2000 : 1 to 1,000,000: 1 (in a perfectly dark

room)

Driving voltage: depend of the battery:• Iphone : 3.7 V• Ipad : 3.7 V



Exemples: Power consumption (mW)Web browsing Video Messaging

LCD IMOD LCD IMOD LCD IMOD

Display 315 23 315 23 315 11

% Saved 93 % 93 % 97 %

Device 555 280 887 612 370 80

% Saved 49.6 % 31.0 % 78.4 %

• Operating Assumptions: 80% active time in an office, 10% in bright light and 10% at night (dim light)

• Display power includes the display plus backlight power for an LCD

and frontlight power for an IMOD source : Pike Research



Exemples: Number of colours

Iphone touch : 262k = 18 bit colours

interferometric modulator display

Documents

basic architecture

memscontrolled paper

generation fpds

imod position

imod electrodesito

imod postsglass

brilliant displayschengyao

imod substrateglassm