In recent, projection display market has grown rapidly to meet the demand of high resolution and large size image in flat panel display. CRT and LCD projection displays are the main stream in the current projection. However they have a lot of limitations in making a higher definition and larger size image. So, many engineers have researched to overcome scientifically those problems. In particular, a new projection display with DLP(Digital Light Processing) had been developed and used commercially. A very important DMD(Digital Micromirror Device) chip in DLP projection was made by applying MEMS technique and had many advantages as below.
- high resolution
- high contrast
- high response time
- high efficiency
However, Texas instruments had monopolized DLP market with those many advantages and scale of this market also increases more and more. Our laboratory focused on this point with MEMS technology accumulated in many years and originally proposed and developed DMD with other structure different from TEXAS’s DMD. Figure as seen below is the SAM images of DMD being developed.
- Lee Kyung-Ho (Ph.D. Candidate, 6th year)
- Lee Joo-Hyung (Ph.D. Candidate, 4th year)
- Lee Jeung-Oen (Ph.D. Candidate, 3rd year)
- Yeun Jueng-Ho (Ph.D. Candidate, 2nd year)
- Lim Kuen-Seo (M.S. Candidate, 2nd year)
- Kim Hyeon-Don (M.S. Candidate, 1st year)
 S.-I. Chang, J.-B. Yoon, “Shape-controlled, high fill-factor microlens array fabricated by a 3D diffuser lithography and plastic replication method,” Optics Express, vol. 12, no. 25, pp. 6636-6371, 2004.
 S.-I. Chang, and J.-B. Yoon, “3D Diffuser Lithography: A Novel Method to Fabricate Various Rounded Microstructures,” The 15th International Conference on Solid-State Sensors and Actuators Tech. Dig. (Transducers’05), Seoul, Korea. vol. 2, pp 1457-1460, 2005.
 J.-W. Jeon, D.-H. Kim, J.-B. Yoon, and K.- S. Lim, “High Fill-Factor Micromirror Array and Its Fabrication Process,” IEEE/LEOS International Conference on Optical MEMS and Their Applications (OMEMS 2005 Flyer), Oulu, Finland . pp. 53-54, 2005.
 S.-I. Chang and J.-B. Yoon, “3D Integration of Microlenses to Realize a Low-Power and High-sensitivity Optical Detection System for a Disposable Lab-on-a-chip,” The Ninth International Conference on Miniaturized Chemical and Biochemical Analysis Systems (MicroTAS 2005) Boston, Massachusetts, USA. pp.449-451, 2005.
 S.-I. Chang and J.-B. Yoon, “A High Efficiency 3D Planar Microlens for Monolithic Optical Interconnection System,” The 18th Annual meeting of the IEEE Laser & Electro-Optics Society LEOS2005, Sydney, Australia. pp.733-734, 2005.
 J.-W. Jeon ,Joon-Yong Choi , J.-B. Yoon and K.- S. Lim “A new three-dimensional lithography using polymer dispersed liquid cystal (PDLC) films,” 19th IEEE International Conference on MEMS, Istanbul,Turkey, 2006.
 S.-I. Chang, J.-H. Lee and J.-B. Yoon, “High Fill-Factor Paraboloidal Microlens Arrays,” IEEE/LEOS International Conference on Optical MEMS and Their Applications (Optical MEMS 2006), Montana, USA
 Joo-Hyung Lee, Joon-Yong Choi, Sang-Min Bae, and Jun-Bo Yoon, “A Novel LCD Backlight Unit using a Light-guide Plate with High Fill-factor Microlens Array and a Conical Microlens Array Sheet,” Society For Information Display Conference 2007, Long Beach, California. vol. 38, book 1, pp. 465-468, 2008
 Jin-Wan Jeon, Jun-Bo Yoon, and Koeng-Su Lim, “Fabrication of 3-D Periodic Photoresist Microstructures for High Fill-Factor Microlens Array Replication”, HARMST 2007, 7th International Workshop on High-Aspect-Ratio Micro-Structure Technology, Besancon, France, pp. 35-36
 Joo-Hyung Lee, Hong-Seok Lee, Byung-Kee Lee, Won-Seok Choi, Hwan-Young Choi, and Jun-Bo Yoon, “Design and Fabrication of a Micropatterned Polydimethylsiloxane (PDMS) Light Guide Plate for Sheet-less LCD Backlight Unit,” Journal of the Society for Information Display, vol.16, no.2, pp.329-335, 2008
 Xing-Jiu Huang, Joo-Hyung Lee, Jong-Won Lee, Jun-Bo Yoon, and Yang-Kyu Choi, “A One-Step Route to a Perfectly Ordered Wafer-Scale Microbowl Array for Size-Dependent Superhydrophobicity,” Small, vol.4, no.2, pp.211-216. 2008
 Dae-Hyun Kim, Jin-Wan Jeon, Koeng Su Lim, and Jun-Bo Yoon, “Development of 16μm×16μm Digital Micromirror Array Suitable for Seamless-picture Projection Display System”, The 7th International Meeting on Information Display (IMID) 2007, DaeGu, Korea, pp. 1159-1162, 2007
 Joo-Hyung Lee, Won-Seok Choi, Kyung-Ho Lee and Jun-Bo Yoon, “A simple and effective fabrication method of various 3-D microstructures: Backside 3-D diffuser lithography”Journal of Micromechanics and Microengineering. doi:10.1088/0960-1317/18/12/125015
 Hong-Seok Lee, Hoon Song, Yong-Kweun Mun, Yoon-Sun Choi,Jeong-Ho Yeon, Joo- Hyung Lee, Jun-Bo Yoon,Hwan-Young Choi, Sangyoon Lee, “Improving Light Extraction Efficiency of Monolithically Fabricated Micropatterned Light Guide Plate” IDW 2008, Niigata,Japan. pp.1851-1852
 Hong-Seok Lee, Hoon Song, Yong-Kweun Mun, Yoon-Sun Choi, Jeong-Ho Yeon, Joo- Hyung Lee, Jun-Bo Yoon,Hwan-Young Choi, Sangyoon Lee, “Improving Light Extraction Efficiency of Monolithically Fabricated Micropatterned Light Guide Plate” IDW 2008, Niigata,Japan. pp.1851-1852