OLED Activities

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LETI / Display Lab | 2

Leti at a Glance Founded in 1967 as part of CEA

1,700 researchers

50 start-ups & 365 industrial partners

Over 1,880 patents

250 M€ budget

CEO Dr. Laurent Malier

210 PhD students + 30 post PhD with 85 foreign students (35%)

~ 30M€ CapEx

273 generated in 2011 40% under license

© CEA. All rights reserved

Main activities in Optoelectronics

Department of Optics and PhoTonics

Photonic on Silicon

• Photonics technologies and components for optical com.

LED

• GaN Led technologies

•LED lighting systems

•Oleds technologies

Displays

•OLED microdisplays

•Optical projection systems

Imagerie

•Vis APS

•IR HgCdTe & InSb photodiodes

•IR Bolometers

Optical sensors

•Infra red spectroscopies for gaz sensing

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LETI / Display Lab | 4

Display lab Components

High brightness 50000 cd/m², Full HD, color, Large FOV, < 50$

OLED: Keywords: OLED Microdisplays, OLED for lighting,

thermal evaporation, TFT

LCD: Keywords: picoprojectors, transparent LCD microdisplay,

LC assembly, amplitude and phase modulator

OLED microdisplay

Display size: 10 x 12 mm

5MPix, 1280x1024,

250cd/m² @ 2,5V, 300mW

Transparent

LCD

Display size:

4 x 3mm

System

Systems 3D perception, Eye tracking, AR, UI,

communication architecture

Optical design Keywords: ray tracing, image quality, innovative optics

System design (incl. Mechanical, electrical design) Keywords: conformability, compactness, versatility,

tactilisation

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LETI / Display Lab | 5

LETI - OLED Expertise In Deposition:

Substrates: Si chip (CMOS) microdisplay applications Glass and flexible substrates mainly for lighting

Deposition technologies: Thermal evaporation Solutions for hybrid OLEDs

In Stack engineering and modelling: Use of doped transport layers:

Wider choice of electrodes, performance, IC process compatibility Lower voltage drop, lower operating voltage, IC compatibility + life

time

« Top » configuration Bottom, transparent stacks. small molecules.

white, monochrome configurations.

Encapsulation and packaging

Packaging Thin-film Encapsulation : low defect density

process, ALD

Strong

background

Strong

background

Strong

background

COMPONENTS

top

bo

tto

m ~1

00

-20

0n

m

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LETI / Display Lab | 6

Focus on OLED evaporation tools

rg

Substrate holder

Shadow mask

Organic

materials sources heaters

Load

lock

Glove box

(encapsulation)

Transfer

chamber

(robot)

Buffer

chamber

Sputtering

chamber :

(ITO, SiO2) Metal

deposition

chamber

Plasma

chamber

Size : 3x5m

Organic

deposition

chamber Organic

deposition

chamber

COMPONENTS

Cluster SUNIC

LESKER Super Spectros

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LETI / Display Lab | 7

PACKAGING

Color filters

LETI has a strong background in this field

OLED microdisplays development

Substrate Si

CMOS

metal Interconnection

anode: pixels

OLED cathode

encapsulation

Startup created in 2007

Display size: 0.38’

Power Consumption 25mW (video mode)

Luminance max 250cd/m² @ 2,5V

Contrast 100000:1

Resolution / pixels 872 x 500 x 4 1.7Mpix

Potential Applications to:

3D mobile video and gaming

Viewfinder for Cameras Camcorders

Medical Applications

HD endoscopies, augmented reality

Si chip: active-matrix (high resolution; integrated drivers, signal processing, ..)

OLED : white OLED + color filter (high resolution)

Display size: 0.61’

COMPONENTS

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LETI / Display Lab | 8

OLED lighting OLED for lighting:

Transparent OLED – glass substrate – 50 x 50mm²

Partnership with OSRAM

‘ON’ state: white light emission ‘OFF’ state: transparency

Color tunable OLED: OLED stripes Substrate: Si - Dimension: 22 x 18 mm²

COMPONENTS

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LETI / Display Lab | 9

OLED flexible Flexible OLED for display and lighting:

LETI 2009 LETI 2010

COMPONENTS

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LETI / Display Lab | 10

Hybrid OLEDs

ITO/Glass

PEDOT/PSS (HIL)

Red QDs

ETL

Ag

Inkjet

Spin coating

Evaporation

Red Quantum Dots (CdSe) as emitters

Develop hybrid QD-LEDs for sources and detectors in the visible range and up to 3µm 2 layers out of solution:

COMPONENTS

HTL: Hole transport layer

HBL: Hole blocking layer

ETL: Electron transport layer

0,096cm² 4cm²

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LETI / Display Lab | 11

Display lab Components

High brightness 50000 cd/m², Full HD, color, Large FOV, < 50$

OLED: Keywords: OLED Microdisplays, OLED for lighting,

thermal evaporation, TFT

LCD: Keywords: picoprojectors, transparent LCD microdisplay,

LC assembly, amplitude and phase modulator

OLED microdisplay

Display size: 10 x 12 mm

5MPix, 1280x1024,

250cd/m² @ 2,5V, 300mW

Transparent

LCD

Display size:

4 x 3mm

System

Systems 3D perception, Eye tracking, AR, UI,

communication architecture

Optical design Keywords: ray tracing, image quality, innovative optics

System design (incl. Mechanical, electrical design) Keywords: conformability, compactness, versatility,

tactilisation

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LETI / Display Lab | 12

Before: Head Mounted Display (HMD) and Head-up display (HUD) were exclusively designed and used for avionic applications

Emerging applications for portable displays

Today: emerging applications for HUD and HMD in consumer market Augmented reality Automotive

SYSTEMS

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LETI / Display Lab | 13

Example: advanced optical design for innovative projection displays suited to harsh environments (automotive) and demanding specifications (high compactness, high brightness, conformability…)

Need for high performances optical systems

High brightness

conformable displays

Smart

windshields

SYSTEMS

Innovation for industry