Issued Patents 2005
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6977876 | Apparatus for and method of detecting defocus error signal for optical pickup and apparatus for and method of detecting seek direction | In-sik Park, Chong-sam Chung, Jin-hoon Jeon, Tae-yong Doh, Byoung-ho Choi | 2005-12-20 |
| 6977982 | Differential phase detection device and tracking error signal detection apparatus using the same | In-sik Park, Joong-eon Seo, Sung-ro Go, Soo-yul Jung, Chang-jin Yang | 2005-12-20 |
| 6961292 | Apparatus generating a seek direction detecting signal for an optical pickup using track cross and track error signals | Chong-sam Chung, In-sik Park, Byoung-ho Choi, Tae-yong Doh | 2005-11-01 |
| 6940799 | Method for generating a signal for detecting the direction of movement of a laser spot, and apparatus therefor | Byoung-ho Choi, Tae Youn LEE | 2005-09-06 |
| 6885621 | Error signal detection apparatus and method for optical recording/reproducing system including comparing phases of sum signals | Byoung-ho Choi, Chong-sam Chung, In-sik Park, Tae-yong Doh | 2005-04-26 |