HYPOLED: VGA OLED micro-display for HMD and micro-projection Uwe Vogel1, Ian Underwood2, Gunther Notni3, Christian Zilstorff4, Klaus Meerholz5, Gunther Haas6 1Fraunhofer
Institute for Photonic Microsystems, Dresden, D-01109, Germany of Edinburgh, Edinburgh, United Kingdom; 3Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany; 4Mobintech A/S, Farum, Denmark; 5Universität zu Köln, Köln, Germany; 6Microoled SARL, Grenoble, France 2University
• Objectives • Challenges & Solutions • Summary/Outlook
© Fraunhofer IPMS Dr. Uwe Vogel
[email protected]
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Objectives: Mobile Displays complexity
Mobile Flexible Display
Main driver: Multimedia content
Mobile Projection Display
Full color PM-Display Microdisplay Monochrome PM-Display
See-through Microdisplay
Full color AM-Display
Multicolor PM-Display
time © Fraunhofer IPMS Dr. Uwe Vogel
[email protected]
Objectives: Overview HYPOLED – "High-Performance OLED-Microdisplays for Mobile Multimedia HMD and Projection Applications" Partners Fraunhofer IPMS (IPMS, D, coordinator), microoled (MOL, F), Mobintech A/S (MOBI, DK), Fraunhofer IOF (IOF, D), University of Cologne (UCO, D), University of Edinburgh (UEDIN, UK), originally co-founded by MicroEmissive Displays (MED, UK) Major targets VGA, >10knits, P-OLED & SM-OLED, LP/LV, 24 bit color , 12μm, wireless video I/F (DVB-T/H/WLAN) Duration Jan 2008 .. Jun 2010
© Fraunhofer IPMS Dr. Uwe Vogel
[email protected]
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Work packages
© Fraunhofer IPMS Dr. Uwe Vogel
[email protected]
Device properties
WP2 (IPMS) Backplane architecture Data interface
WP5 (IPMS) Video interface Video interface
WP3 (MOL) OLED integration Mechanical specification
"Application assessment, dissemination and exploitation"
WP7 (MOL)
WP1 (IPMS) Management and Coordination
Optical interface
WP4 (IOF) Optics
Optical interface
WP6 (MOBI) System Integration
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WP2: OLED microdisplay backplane (IPMS) colour VGA (640x480) OLED micro-display for HMD and micro-projection 24 bit parallel video interface color options monochrome (8 bit) full-colour (24 bit) digital pixel cell luminance control by pulse width (PWM) color, contrast and gamma correction control via I²C 0.18μm CMOS foundry process core supply 1.8V digital 1.8V I/O interfaces negative OLED cathode voltage (max. -5.5V) active area 7.68x5.76mm² 5.8mm
chip size 12x11mm² High brightness up to 10,000 nits for monochrome green (micro-projection) 1,000 nits for RGB colour (HMD) I²C interface (configuration) 50/60Hz frame rate © Fraunhofer IPMS Dr. Uwe Vogel
[email protected]
7.7mm
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WP3: OLED integration
OLED modeling (UEDIN)
AC model
DC and AC models for IPMS pin and UCO OLED derived
HMD SM-OLED, color-by-white (IPMS, MOL) MPU double-emission monochrome green pin-OLED (>10,000 nits) dummy display 100 cd/m² @ 4.35 V CIE (0.28/ 0.36) reference sample 100 cd/m² @ 3.03 V CIE (0.31/ 0.41)
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CMOS foundry CMOS top-metal modification base process (optional)
pin-OLED deposition
(thin film) encapsulation (incl. colour filter)
dicing & assembly
Current density (mA/cm²)
10
1
10
0
10
5
10
4
10
-1
10
3
10
-2
10
-3
10
2
10
-4
10
Luminance (cd/m²)
3
10
-5
10
-6
10
1
10 -5
-4
-3
-2
-1
0
1
2
3
4
5
6
Voltage (V)
LIV-characteristics of a micro-patterned double-emission white pin-OLED
Color filter/ cover glass
100000
1000
100
