Issued Patents All Time
Showing 101–125 of 125 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6275461 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-08-14 |
| 6272096 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-08-07 |
| 6266315 | Catadioptric optical system, optical pickup and optical disk drive employing the same, and optical disk | Chul-woo Lee, Yong-Moon Lee, Cheol-sung Yeon, Joong-eon Seo, Young-min Cheong +4 more | 2001-07-24 |
| 6222812 | Optical pickup using an optical phase plate | Jang-hoon Yoo, Chul-woo Lee, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2001-04-24 |
| 6198714 | Optical pickup having an objective lens compatible with a plurality of optical disk formats | Jang-hoon Yoo, Chul-woo Lee, Kun-ho Cho | 2001-03-06 |
| 6114689 | Optical pickup device | Kun-ho Cho, Jang-hoon Yoo, Yong-hoon Lee, Chul-woo Lee | 2000-09-05 |
| 6091691 | Optical pickup having an objective lens compatible with a plurality of optical disk formats | Jang-hoon Yoo, Chul-woo Lee, Kun-ho Cho | 2000-07-18 |
| 6081498 | Optical pickup compatible with recordable compact disk and digital video disk using plane parallel plates | Jang-hoon Yoo, Chul-woo Lee | 2000-06-27 |
| 6023449 | Optical pickup for adjusting focus error signal offset and having widely separated photodetector elements | — | 2000-02-08 |
| 6016293 | Method of discriminating discs having different thickness and optical pickup device adopting the same | Chul-woo Lee, Jang-hoon Yoo | 2000-01-18 |
| 5991254 | Optical pickup having a multi-coated polarization holographic element | Chul-woo Lee, Keon-ho Cho | 1999-11-23 |
| 5987924 | Lens mold and method of manufacturing a lens | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Kun-ho Cho, Pyong-yong Seong +2 more | 1999-11-23 |
| 5933401 | Optical pickup having plural optical sources and plural optical detectors | Chul-woo Lee, Dong-Ho Shin, Pyeong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 1999-08-03 |
| 5870369 | Objective lens device including an objective lens and a transparent member having two light control portions and optical pickup using the objective lens device | Chul-woo Lee, Pyong-yong Seong | 1999-02-09 |
| 5822135 | Lens device including a light controlling mechanism and an optical pickup apparatus using a lens device | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Kun-ho Cho, Pyong-yong Seong +2 more | 1998-10-13 |
| 5802037 | Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses | Chul-woo Lee, Kyung-hwa Rim, Kun-ho Cho, Jang-hoon Yoo, Soo Jung | 1998-09-01 |
| 5777973 | Reproducing and recording optical pickup compatible with discs having different thicknesses | Jang-hoon Yoo, Chul-woo Lee, Kyung-hwa Rim, Kun-ho Cho | 1998-07-07 |
| 5699340 | Method for correcting aberration due to optical disk tilt and apparatus therefor | Chul-woo Lee, Kyung-hwa Rhim, Pyong-yong Seong | 1997-12-16 |
| 5699339 | Inverse image generating method apparatus thereof and focus error detecting method using the same and apparatus thereof | Chul-woo Lee, Jang-hoon Yoo, Kyung-hwa Rim | 1997-12-16 |
| 5665957 | Lens device comprising light blocking means and an optical pickup apparatus using the lens device | Chul-woo Lee, Dong-Ho Shin, Kyung-hwa Rim, Kun-ho Cho, Pyong-yong Seong +2 more | 1997-09-09 |
| 5629514 | Critical angle focus error detector | Chul-woo Lee, Jang-hoon Yoo, Kyung-hwa Rim | 1997-05-13 |
| 5594714 | Focus error detection with two symmetrically splitted reflected beams | Chul-woo Lee, Kyung-hwa Rim, Pyong-yong Seong | 1997-01-14 |
| 5587976 | Optical pickup for optical magnetic disc | Jang-hoon Yoo, Kyung-hwa Rim, Chul-woo Lee | 1996-12-24 |
| 5537384 | Focus error detector | Chul-woo Lee, Jan-hoon Yoo, Kyung-hwa Rim | 1996-07-16 |
| 5353156 | Projection lens system | — | 1994-10-04 |