Johan Bergquist

Background

Johan Bergquist is Principal Scientist at the Display Entity of Technology Platforms, which develops imaging solutions for Nokia's business units.

Johan joined the Visual Communications Laboratory of Nokia Research Center as Senior Research Engineer in 1999. He has a background in nonlinear optics and quantum-well semiconductor physics and has worked in the area of displays since 1993.

Research Interests

• Display and liquid crystal physics
• Applied vision and ergonomics
• Colour science
• Still and moving image quality
• Display metrology

Papers

1. Johan Bergquist and Carl Wennstam, "Field-Sequential-Colour Display with Adaptive Gamut", Society for Information Display Symposium Digest, 35, 1594-1597 (2006) Download
2. Johan Bergquist, "Resolution and contrast requirements on mobile displays for different applications in varying luminous environments", Proceedings of the 2nd International Symposium on Nanovision Science, Hamamatsu, 143-145 (2005) Download
3. Johan Bergquist, "Visual Ergonomics Challenges in Information-Intensive Mobile Displays", Proceedings of the 10th International Display Workshops, Fukuoka, 1487-1490 (2003) Download
4. Johan Bergquist, "Display Requirements for Mobile Information Terminals", Proceedings of the 2nd International Display Manufacturing Conference, Seoul, Paper 22-2 (2003) Download
5. Johan Bergquist, "Next Generation Display Technologies for Electronic Books in Japan", 2nd Annual Workshop on Electronic Books, National Institute of Standards, Gaithersburg, (1999) Download
6. Y. Tomita and J. Bergquist, "Photorefractive And Thermooptic Nonlinearities In Potassium Sodium Strontium Barium Niobate Single Crystals", Optoelectronics 8(3), 357-377 (1993) Download
7. Y. Tomita, J. Bergquist, and M. Shibata, "Photorefractive Properties of Undoped, Cr-doped, and Cu-doped KNSBN crystals", Journal of the Optical Society of America B10(1), 94-99 (1993) Download
8. J. Bergquist, Y. Tomita, and M. Shibata, "Near Infrared Photorefractivity in Cr-doped Potassium Sodium Strontium Barium Niobate Single Crystal", Applied Physics A55, 61-64 (1992) Download
9. M. Shibata, Y. Tomita, and J. Bergquist, "Time-Resolved Nonlinear Absorption with Picosecond Two-Beam Excitation in Semi-Insulating Semiconductors", Kogaku 21(9), 620-628 (1992). Download Japanese, English translation
10. Y. Tomita, M. Shibata, and J. Bergquist, "Effects of Free-carrier Absorption on Time-resolved Pump-probe Two-photon Absorption in Semi-insulating Semiconductors", Journal of Applied Physics 72, 1075-1079 (1992) Download
11. Y. Tomita, M. Shibata, and J. Bergquist, "Pulsewidth Dependence of Time-Resolved Two-Photon Absorption with Picosecond Pump-Probe Excitation", Journal of Applied Physics 71(5), 2102-2105 (1992) Download
12. K. Fujii, A. Shimizu, J. Bergquist, T. Sawada, and S. Ikeda, "Two-Photon Absorption Spectra of Quantum-Well Excitons in Static Electric Fields", Modern Physics Letters B5(17), 1133-1139 (1991) Download
13. M. Shibata, Y. Tomita, and J. Bergquist, "Pico-second Photorefractive effect in Semi-insulating Semiconductors and Pulsewidth dependence on Two-photon absorption:Experiment", presented at the 52nd Meeting of the Japanese Society of Applied Physics, Toyama 1991 (In Japanese)
14. K. Fujii, A. Shimizu, J. Bergquist, T. Sawada, "Observation of Two-photon-absorption Quantum Confined Stark Effect in Quantum-well Structures", paper QPDP-15 presented at the 17th International Quantum Electronics Conference, Anaheim, May 1990
15. K. Fujii, A. Shimizu, J. Bergquist, and T. Sawada, "Electric-Field-Induced Changes in the Two-Photon Absorption Spectrum of Multiple-Quantum-Well Structures", Physical Review Letters 65(14), 1808-1811 (1990) Download
16. H. Oda, A. Ishizaki, J. Bergquist, and M. Seki, "MBE Growth of CdTe/CdMnTe Multiple Quantum Well Structure on a (001) GaAs Substrate", presented at the 2nd Conference on Advanced Process and Characterization Technology, Tokyo, 1989

Patents and Patents Pending

1. Display Circuit with Optical Sensor. Download U.S. patent application
2. Reflectors. Download U.S. patent application
3. All-Optical Light Modulating Apparatus and All-Optical Process for Modulating Light. Download U.S. and Japanese patent
4. Optical pulse shaping device and method. Download abstract in English and Japanese patent application
5. Narrow band optical filter. Download abstract in English and Japanese patent application

Conference Presentations

1. Johan Bergquist and Carl Wennstam, "Field-Sequential-Colour Display with Adaptive Gamut", Society for Information Display Symposium (2006) Download slides or slides with speech
2. Johan Bergquist, "Resolution and contrast requirements on mobile displays for different applications in varying luminous environments", 2nd International Symposium on Nanovision Science, Hamamatsu (2005) Download
3. Johan Bergquist, "Visual Ergonomics Challenges in Information-Intensive Mobile Displays", 10th International Display Workshops, Fukuoka (2003) Download
4. Johan Bergquist, "Display Requirements for Mobile Information Terminals", 2nd International Display Manufacturing Conference, Seoul (2002) Download

Seminar Slides

1. Display-induced motion artefacts. Download
   Seminar at the Media Technology Laboratory, Helsinki University of Technology, Mar 27th, 2007
2. Direct-view field-sequential display technologies for portable devices. Download (in Japanese)
   Seminar at the Information Display Technology Research Committee, Foundation for the Advancement of Science, Tokyo, March 9th, 2007.
3. OLEDs vs LCDs. Download
   Seminar at the Advanced Display Research Center, Kyunghee University, Seoul, February 22nd, 2007.
4. Digital convergence and its service development in Japan and Northern Europe. Download (in Japanese)
   Seminar at the Japanese Insitute of Scandinavian Studies, March 25th, 2004. Video
5. Experiences from Basic and Applied Research at Domestic and Foreign Organisations in Japan. Download
   Seminar arranged by Chalmers Advanced Management Programs, International Management of Technology Program, Tokyo, November 21st, 2003.
6. Mobila internettjänster i tredje generationens mobiltelefoni och andra trådlösa nätverk. Download (in Swedish)
   Seminar for the Board of Regional Research in West Sweden, Tokyo, April 3rd, 2003.
7. Bildskärmen viktigast i framtidens mobiltelefoner. Download (in Swedish)
   Seminar at the inauguration of the Swedish LCD Center, June 2nd, 2002.
8. Creating Value through Innovation - Mobile e-Business. Download
   Seminar at FPD/LCD International, October 27th, 2000.
9. Next Generation Mobile Terminals and their Display Requirements. Download (in Japanese)
   Seminar at FPD/LCD International, October 26th, 2000.
10. Requirements for Organic Electroluminescent Displays (OLEDs) in Mobile Phones. Download (in Japanese)
    Seminar arranged by Electronic Journal, May 30th, 2000.
11. Displayteknik för presentationsystem idag och i framtiden. Download (in Swedish)
    Seminar at the Physics Department, Chalmers University of Technology, May 9th, 2000.

Professional Activities

• Member of Technical Committee 110, Working Group 2 (liquid crystal displays), International Electrotechnical Commission
• Member of Technical Committee 110, Working Group 5 (organic electroluminencence displays), International Electrotechnical Commission
• Member of Organic Electroluminencence Displays (OLED) Committee, Japan Electronics and Information Technology Industries Association
• Member of Liquid Crystal Display Committee, Japan Electronics and Information Technology Industries Association
• Member of Electronic Display Committee, Japan Electronics and Information Technology Industries Association
• Member of Applied Vision and Human Factors Programme Committee, International Display Workshops
• Member of Applied Vision Programme committee, Society for Information Display International Symposium
• Visiting Associate Professor at Cooperative Research Center, Shinshu University, April 1999 - March 2000
• Member of the Public Relations Committee, The Japan Society of Applied Physics, April 1998 - March 1999
• Member of the Oyo Buturi International Editorial Board, The Japan Society of Applied Physics, December 1997 - March 1999
• Member of the Science and Technology Action Group (STAG), British Chamber of Commerce in Japan, 1994-1997. STAG published a book on foreign scientists working in Japan.

Memberships

• Society for Information Display
• Optical Society of America
• Japanese Liquid Crystal Society
• The Japan Society of Applied Physics
• National Japanese Committee of Commission Internationale de l'Éclairage (CIE)
• The Illuminating Engineering Institute of Japan
• The Institute of Image Information and Television Engineers
• The Institute of Electronics, Information, and Communication Engineers
• Forum for advancement of three dimensional image technology and arts
• Holographic Display Artists and Engineers Club
• Plasma Display Technology Evaluation Group

Education

• Doctor of Philosophy in physics, School of Physics and Physics Engineering, Chalmers University of Technology, Göteborg, Sweden, 1994. Dissertation: Two-Photon Absorption in Semiconductors and Ferroelectrics Download
• Master of Science in physics engineering, School of Physics and Physics Engineering, Chalmers University of Technology, 1988. Thesis: Experimental Study of Optical Nonlinearity by Giant Dipole Moment of Virtual Excitons in DC-biased AlGaAs/GaAs Multiple Quantum Wells
• Russian grammar and literature, 10 credits, Department of Slavic Languages, University of Göteborg, Sweden, January - June 1988
• Swedish Defense Language School for Interpreters, Uppsala, June 1985 - August 1986
• Russian grammar and literature, 20 credits, Department of Slavic Languages, Uppsala University, Sweden, August 1985 - June 1986
• Eastern European politics and economics, 20 credits, Department of Eastern European Studies, Uppsala University, August 1985 - June 1986
• High school programme in natural sciences specialising in computer technology, Hvitfeldtska Gymnasiet, Göteborg, September 1980 - June 1983

Experience

• Senior Technology Analyst, Asian Technology Information Program, Tokyo, September 1995 - August 1999
• Technology Analyst, Asian Technology Information Program, Tokyo, September 1995 - September 1998
• Research Associate, Department of Electronics Engineering, University of Electro-Communications, Tokyo, July 1994 - August 1995
• Strategic R&D Analyst, R&D Headquarters, Canon Inc., Kawasaki, Japan, April 1992 - February 1993
• Research Scientist, Quantum Electronics Laboratory, Exploratory Research Division, Canon Research Centre, Atsugi, Japan, January 1990 - March 1992
• Research Scientist, Electro-Optics Division, Canon Research Centre, April - December 1989
• Trainee, Theory Exploratory Division, Canon Research Centre, August 1988 - February 1989
• Lecturer in BASIC programming (part time), Medborgarskolan (Open University), Göteborg, 1983 - 1985
• Lecturer in assembler programming (part time), Datainterface Inc., Göteborg, 1983 - 1984
• Software Developer (part time), Datainterface Inc., 1983 - 1984
• Practical training at the Volvo Genuine Parts Supply Centre, summer of 1986
• Holiday work at Lion Ferry AB, 1981-1983