Issued Patents All Time
Showing 26–50 of 98 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7110334 | Method for detecting servo error, apparatus therefor, disk which maintains quality of servo error signal, method of controlling servo of disk recording/reproducing apparatus, method of detecting tracking error, and method of detecting tilt error | Seong-sin Joo, In-sik Park, Byung-in Ma, Chong-sam Chung, Jung-wan Ko +2 more | 2006-09-19 |
| 7072254 | Optical pickup device and recording medium used therefor | Dae-sik Kim, Soon-kyo Hong, Chul-woo Lee, Ho-Cheol Lee, Kun-ho Cho | 2006-07-04 |
| 7072114 | Optical pickup using an optical phase plate and which is compatible with optical recording media of different types | Chul-woo Lee, Chong-sam Chung, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2006-07-04 |
| 7046611 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens | Chul-Hoo Lee | 2006-05-16 |
| 7035191 | Compatible optical pickup using light sources following a common optical path | Chul-woo Lee, Jong-ryull Kim | 2006-04-25 |
| RE39025 | 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, Chong-sam Chung, Kun-ho Cho +2 more | 2006-03-21 |
| 7016291 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Chul-woo Lee, Kun-ho Cho, Pyong-yong Seong | 2006-03-21 |
| 6985293 | Optical pickup using an optical phase plate and which is compatible with optical media for different types | Chul-woo Lee, Chong-sam Chung, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2006-01-10 |
| 6938890 | Objective lens for high-density optical focusing and an optical disk in an optical pickup | Kun-ho Cho, Seung-tae Jung, Chul-woo Lee, Dong-Ho Shin | 2005-09-06 |
| 6882614 | Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses | Chul-woo Lee | 2005-04-19 |
| 6816449 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens | Chul-woo Lee | 2004-11-09 |
| 6791933 | Optical pickup using an optical phase plate | Chul-woo Lee, Chong-sam Chung, Pyong-yong Seong, Kun-ho Cho, Hyun-seob Choi +3 more | 2004-09-14 |
| 6788636 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens | Chul-woo Lee | 2004-09-07 |
| 6765857 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Chul-woo Lee, Kun-ho Cho, Pyong-yong Seong | 2004-07-20 |
| 6721243 | METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERROR SIGNAL, METHOD OF CONTROLLING SERVO OF DISK RECORDING/REPRODUCING APPARATUS, METHOD OF DETECTING TRACKING ERROR, AND METHOD OF DETECTING TILT ERROR | Seong-sin Joo, In-sik Park, Byung-in Ma, Chong-sam Chung, Jung-wan Ko +2 more | 2004-04-13 |
| 6657942 | Optical recording and reproducing apparatus having floating swing arm and optical disk for use therewith | Chul-woo Lee, Joong-eon Seo, Seung-tae Jung, Myong-do Ro, Kun-ho Cho +2 more | 2003-12-02 |
| 6639889 | Recording/reproducing apparatus including an optical pickup having an objective lens compatible with a plurality of optical disk formats | Chong-sam Chung, Chul-woo Lee, Kun-ho Cho | 2003-10-28 |
| 6636464 | Optical pickup device capable of detecting stable error signal | Yong Jae Lee, Pyong-yong Seong, Byung-ryul Ryoo, Yong-Ki Son | 2003-10-21 |
| 6556521 | METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERROR SIGNAL, METHOD OF CONTROLLING SERVO OF DISK RECORDING/REPRODUCING APPARATUS, METHOD OF DETECTING TRACKING ERROR, AND METHOD OF DETECTING TILT ERROR | Seong-sin Joo, In-sik Park, Byung-in Ma, Chong-sam Chung, Jung-wan Ko +2 more | 2003-04-29 |
| 6556520 | METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERROR SIGNAL, METHOD OF CONTROLLING SERVO OF DISK RECORDING/REPRODUCING APPARATUS, METHOD OF DETECTING TRACKING ERROR, AND METHOD OF DETECTING TILT ERROR | Seong-sin Joo, In-sik Park, Byung-in Ma, Chong-sam Chung, Jung-wan Ko +2 more | 2003-04-29 |
| 6547398 | Projection-type image display apparatus and method | Kun-ho Cho, Seung-tae Jung, Chul-woo Lee | 2003-04-15 |
| 6480222 | Semiconductor laser and flying optical pickup for recording/reproducing using the same | Chul-woo Lee, Pyong-yong Seong | 2002-11-12 |
| 6469979 | METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERROR SIGNAL, METHOD OF CONTROLLING SERVO OF DISK RECORDING/REPRODUCING APPARATUS, METHOD OF DETECTING TRACKING ERROR, AND METHOD OF DETECTING TILT ERROR | Seong-sin Joo, In-sik Park, Byung-in Ma, Chong-sam Chung, Jung-wan Ko +2 more | 2002-10-22 |
| 6466529 | Optical pickup assembly and method of detecting tilt | Seok-jung Kim, Yong-hoon Lee, Tae Kyung Kim | 2002-10-15 |
| 6449237 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure | Chul-woo Lee, Kun-ho Cho, Pyong-yong Seong | 2002-09-10 |