imola - imec...imola = intelligent light management for oled-on-foil applications eu-fp7 research...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 1

IMOLA a modular and interactive

OLED-based lighting system

Jan Doutreloigne, imec project coordinator

www.imola-project.eu

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 2

Outline

Facts and figures IMOLA concept Technical objectives / challenges Project demonstrators Partner involvement Driver IC design Questions & answers

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 3

Facts and figures

IMOLA = Intelligent Light Management for OLED-on-Foil Applications

EU - FP7 research project (STREP, ICT) Duration = 3 years Started on Oct. 1st, 2011 Balanced consortium of 8 partners:

3 academic and research institutes 5 private companies

6 nationalities: Belgium, Netherlands, Germany, Croatia, Italy and Israel

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 4

IMOLA concept

Current OLED technology developments focus on material research, higher efficiency, low-cost production,...

However, for fully exploiting the potential of OLED-on-foil technology in a lighting system, new developments in other domains are needed: Driving electronics Power distribution Integration & miniaturization Interaction with human environment, based on sensors ...

⇒ IMOLA wants to bridge this gap!!!

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 5

IMOLA concept

Interactive, modular, flexible, large-area, OLED-based lighting system on low-cost foil with built-in intelligent light management

Laminated together

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 6

IMOLA concept

3D impression:

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 7

IMOLA concept

Electrical connection:

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 8

IMOLA concept

Advantages of the modular architecture: HV power supply in combination with local down-conversion

to suitable OLED voltage reduces the conduction losses in the power supply tracks → increased power efficiency

Possibility of displaying patterns instead of uniform lighting Sensor-based human/ambient interaction capability: light

on a wall/ceiling can follow the position of a person or mimic a person’s gestures, touch screen, reaction to sound,…

Local control allows compensation of OLED ageing effects or compensation of brightness non-uniformity → increased life-time and better brightness uniformity

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 9

Technical objectives / challenges

Backplane technology: Development of low-cost flexible backplane (PET + Al) Process for IC mounting on backplane foil (flip-chip, UTCP) Development of suitable adhesives and ferrite pastes Lamination of OLED tiles (on foil or glass) onto the

backplane foil Reliable electrical interconnection between OLED tile,

driver IC and embedded inductor ...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 10

Technical objectives / challenges

Backplane technology: Development of low-cost flexible backplane (PET + Al) Process for IC mounting on backplane foil (flip-chip, UTCP) Development of suitable adhesives and ferrite pastes Lamination of OLED tiles (on foil or glass) onto the

backplane foil Reliable electrical interconnection between OLED tile,

driver IC and embedded inductor ...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 11

Technical objectives / challenges

Backplane technology: Development of low-cost flexible backplane (PET + Al) Process for IC mounting on backplane foil (flip-chip, UTCP) Development of suitable adhesives and ferrite pastes Lamination of OLED tiles (on foil or glass) onto the

backplane foil Reliable electrical interconnection between OLED tile,

driver IC and embedded inductor ...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 12

Technical objectives / challenges

Backplane technology: Development of low-cost flexible backplane (PET + Al) Process for IC mounting on backplane foil (flip-chip, UTCP) Development of suitable adhesives and ferrite pastes Lamination of OLED tiles (on foil or glass) onto the

backplane foil Reliable electrical interconnection between OLED tile,

driver IC and embedded inductor ...

Rigid OLED-on-glass (Philips)

Flexible OLED-on-foil (TNO-Holst)

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 13

Technical objectives / challenges

Driver IC + inductor: Design of high-performance embedded inductor based on

very tough targets (inductance, parasitic resistance and capacitance, resonance frequency,...)

Development of accurate inductor model Design of power-efficient high-frequency OLED driver IC EMC-compliance (radiated + conducted emission) ...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 14

Technical objectives / challenges

Functionality: Compensation of OLED degradation and non-uniformity based

on electrical measurements Integration of central + local intelligence for enhanced sensor-

based interaction with the human environment Inter-module communication (DALI protocol) ...

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 15

Project demonstrators

General lighting demonstrator: (Philips)

Wall light

Goal: alternative for Philips “Living Shapes” wall light, featuring reduced cost, reduced weight, reduced thickness and fully integrated electronics on a flexible backplane

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 16

Project demonstrators

Automotive lighting demonstrators: (CRP)

Tail light Dome light

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 17

Project demonstrators

Intermediate demonstrators:

INDUCTOR 1 INDUCTOR 2

INDUCTOR 3 INDUCTOR 4

ELECTRONICS

OLED 1 OLED 2

OLED 4OLED 3

+ =

Sensor-based interaction Intelligent backplane

Flexible tail light

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 18

Partner involvement

Academic and research institutes: Imec: • Project coordination • OLED driver IC design • Backplane technology development

TNO-Holst: • Supply of OLED-on-foil cells • Backplane technology development • Investigation of sensor options for interaction with human

environment

Zagreb University: • Embedded inductor design • EMC analysis • Implementation of compensation algorithm • Implementation of system-level communication

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 19

Partner involvement

Private companies: Hanita: • Supply/development of PET + Al foils

Henkel: • Supply/development of ferrite pastes • Supply/development of adhesives for lamination + interconnection

CRP: • Design/development of automotive tail

light and dome light demonstrators

Philips: • Supply of OLED-on-glass cells • Design/development of wall light demonstrator

Fundico: • Project administration • Reporting • Logistics

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 20

Driver IC design

Switching DC-DC buck converter with PWM control:

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 21

Driver IC design

Switching DC-DC buck converter with PWM control:

Current sensing + feedback to control the OLED brightness!

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 22

Driver IC design

Block diagram of OLED driver IC “COLD”:

Electrical feedback loop for OLED brightness control

DC-DC buck converter power stage

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 23

Driver IC design

Layout of OLED driver IC “COLD”: 0.35µm 80V I3T80

technology of ON Semiconductor

Die size: 12mm2

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 24

Driver IC design

Example: measured HV output pulses @5MHz

IMOLA | Final Workshop – Barcelona – 06.05.2014 | Jan Doutreloigne Slide 25

Questions & answers