Project HILASE: Next-generation UHD/4K solid-

state illuminated projection

Industry Science Meeting, Drammen

Dr. M. Nadeem AkramProfessor at IMS USN, Photonics/Optics Group

5/28/2018

5/28/2018 Project HILASE 2

An Industry-University Project, Funded by RCN, Barco AS(Total Funding: 27MNOK, Funding by RCN: 11 MNOK)

Develop 20000+ Lumen Laser/Phosphor 4K single-chip TRP DMD projector:

1- Using efficient laser/phosphor hybrid light sources to replace lamp-based sources in Display Projectors, for better lifetime, wider colour gamut, lower powerconsumption, lower maintenance cost

2- Compact optics engine (hybrid illumination, reduced stray light, higher contrast, higher MTF)

3- Optical super-imposition and digital upscaling of images from 2K to 4K and beyond, algorithms and evaluation methods

Main Objectives:

5/28/2018 Project HILASE 3

Main Parts of a Projector:

Lamp: White Light SourceDigital MicroMirror Device(from Texas Instruments)

Optics

Electronics/Image Processing

5/28/2018 Project HILASE 4

DMD Pixel Size Reduction

5.4 x 5.4 um pixel size for higher resolution and TRP technology.

13.7 um600 nm CMOS

10.8 um420 nm CMOS

7.6 um420 nm CMOS

5.4 um180 nm CMOS

Reoslution: FHD 1920x1080, 4K (3840x2160) pixels

5/28/2018 Project HILASE 5

TRP DMD Pixel Architecture

• New 17 Degree TRP Design

+17 Deg

12 DegIlluminationf/1.7 @ 34 deg

Off-state

On-state

-17 Deg

DMD Efficiency

• Contrast Ratio (Theoretical)– Scaled diffraction effects degrade contrast

7.6 um Pixel 1269:1

5.4 um Pixel 769:1 40% drop

On Off Contrast Ratio

6Project HILASE5/28/2018

DMD Efficiency

• Brightness Efficiency (Theoretical)– TRP provides ~1.3x to 2X brightness over BTP design

BTP (12 Deg)

on

off

flat

on

off

TRP (17 Deg)

on

off

flat

on

off

> Etendue

Project HILASE 75/28/2018

5/28/2018 Project HILASE 8

Classical Single DMD Light Engine

(PhD Student: Burak Cunbul)

1) Light source and collection/condensation optics

2) Relay optics and TIR prism

3) Projection Lens

4) Simulations, Design, Prototype,

measurements

5/28/2018 9

Blue photon from laser Green photon from Phosphor

Green Phosphor

Heat

Phosphor Spectral Response

0

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

380 430 480 530 580 630 680 730 780

Wavelength (nm)

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

R31 (44.3 lm/w )

G34 (201 lm/w )

Y31 (214 lm/w )

Blue Laser

Phosphor for Green/Red Light, Excited

by Blue Laser Diodes (~200Watt)

Project HILASE

5/28/2018 Project HILASE 10

Ce:YAG, Ce:LuAG, Ce:GAGG, and Ce:GdYAG Single Crystal Phosphors

Shifted superimposition

PhD Student: Svein Arne Hansen

Project HILASE 115/28/2018

Superimposition: A cheap way to enhance resolution above

the native resolution of DMD

Project HILASE 125/28/2018

Work done so far:

5/28/2018 Project HILASE 13

• Prototype Laser/Phosphor Projector Built with Superimposition

• Setup for Phosphor Measurements (PL, QE, Em,Exc, Abs, high power excitation)

• New Optical Simulation Tools developed (opto thermal simulations, superimpositioning)

• New Phosphor materials evaluated (Eu Mn ZnO)

• Both PhD students passed their Midterm Evaluations

Publications: 1. Balci, Mustafa H.; Chen, Fan; Cunbul, Ahmet Burak; Svensen, Øyvind; Akram, Muhammad Nadeem; Chen, Xuyuan. Comparative study of blue laser diode driven cerium-doped single crystal phosphors in application of high-power lighting and display technologies. Optical Review 2017 p. 1-92. Balci, Mustafa H; Chen, Fan; Cunbul, Ahmet Burak; Svensen, Øyvind; Akram, Muhammad Nadeem; Chen, Xuyuan. Comparative Study of Blue Laser Diode driven Ce:YAG, Ce:LuAG, Ce:GAGG, and Ce:GdYAG Single Crystal Phosphors in Application of High-Power Lightning and Projectros. The 6th Laser Display and Lighting Conference 2017 (LDC'17), Yokohama Japan; 2017-04-01 - 2017-04-063. Cunbul, Ahmet Burak; Balci, Mustafa H; Chen, Xuyuan; Svensen, Øyvind; Akram, Muhammad Nadeem. Laser Driven Phosphor Light Engine for High Lumen DMD Projector. The 6th Laser Display and Lighting Conference 2017 (LDC'17), Yokohama, Japan; 2017-04-01 - 2017-04-054. Cunbul, Ahmet Burak; Balci, Mustafa H; Chen, Xuyuan; Svensen, Øyvind; Akram, Muhammad Nadeem. Laser Driven Static Light Engine Based on LuAG: Ce Single Crystal Phosphor. International Optical Design Conference; 2017-07-09 - 2017-07-145. S. A. J. Hansen, J. Y. Hardeberg, and M. N. Akram, “Resolution enhancement through superimposition of projected images how to evaluate the quality?,” in Electronic Imaging, Image Quality and System Performance XIV, pp. 141–146(6), Society for Imaging Science and Technology (2017) 6. Resolution enhancement through superimposition of projected images how to evaluate the quality?,” in Electronic Imaging 2017, Image Quality and System Performance XIV“4K Native vs Pixel shifted 4K vs WQXGA@120”, Display Summit 2017. Insight Media Conference, Oct 20177. Svein Arne Jervell Hansen, Muhammad Nadeem Akram, Jon Yngve Hardeberg, Marius Pedersen, "Preferred image quality metric for shifted superimposition-based resolution-enhanced images," J. Electron. Imaging 27(3), 033017 (2018), 8. R. Byanju, M. N. Akram, S. A. J. Hansen “A comparative study of superimposition techniques for enhancing the projector resolution: Simulations and Experiment”, 2018, Under review in Displays Journal by Elsevier

5/28/2018 Project HILASE 14

Previous Projects:

1- HICFODS (2007-2010)- To develop understanding of Laser Speckle phenomenon and its

mitigation methods

(USN, IgnisDisplay, NTNU, Funded by KMB Program)

2- MEMSDeSpeck (2011)- Develop MEMS based low-cost devices for Speckle reduction

(USN, MEMSCAP, ProjectionDesgin, Funded by Oslofjordfond)

3- LasePro (2011-2015)- Develop high lumen Laser/Phosphor hybrid DMD Projector, mitigate

speckle effects

(USN, ProjectionDesign, Cyviz, Funded by BIA Program)

4- BTHE (2014-2017)- Beat the Human Eye, Tunable MicoLenses for mobile phone cameras

(USN, PoLight, funded by BIA program, Lead by Prof. Einar Halvorsen)

Thank you for your attention

Project HILASE 155/28/2018