Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7426124 | DC-AC converter | Seung Kon Kong, Tae Jin Kim | 2008-09-16 |
| 6316882 | Electronic ballast having a stable reference voltage and a multifunction input for soft dimming and ON/OFF control | Maeng-Ho Seo | 2001-11-13 |
| 6262542 | Electronic ballast system | Dae Bong KIM | 2001-07-17 |
| 6215255 | Electric ballast system | Dae Bong KIM | 2001-04-10 |
| 6178104 | Power factor correction circuit using reverse sawtooth waves | — | 2001-01-23 |
| 6175218 | Power factor correction (PFC) controller | Kyung-Hee Jang, Maeng-Ho Seo | 2001-01-16 |
| 6084451 | Pulse width modulation controller operational in both current and voltage mode | Kyung-Hee Jang, Sang-Woo Lee | 2000-07-04 |
| 5973458 | Sequential feedback control system for an electronic ballast | Maeng-Ho Seo | 1999-10-26 |
| 5949229 | Power factor correction circuit having an error signal multiplied by a current signal | Maeng-Ho Seo | 1999-09-07 |
| 5770926 | Feedback control system of an electronic ballast which detects arcing of a lamp | Maeong-Ho Seo | 1998-06-23 |
| 5764039 | Power factor correction circuit having indirect input voltage sensing | Maeng-Ho Seo | 1998-06-09 |
| 5705896 | Control electronic ballast system using feedback | — | 1998-01-06 |
| 5699238 | Zero voltage switching controller of resonance mode converter and electronic ballast using the same | Young-Sik Lee, Hyun-min Jo, Kyung-ha Jee | 1997-12-16 |
| 5648702 | Dimming control circuit having feedback frequency control | Kyung-ha Jee | 1997-07-15 |
| 5642065 | Zero-voltage switching circuitry, as for use in resonant inverters | Maeng-Ho Seo | 1997-06-24 |
| 5612609 | Continuous conduction mode switching power supply with improved power factor correction | — | 1997-03-18 |
| 5546300 | Zero voltage switching controller of resonance mode converter and electronic ballast using the same | Young-Sik Lee, Hyun-min Jo, Kyung-ha Jee | 1996-08-13 |
| 5500792 | Zero-voltage switching type electronic ballast for fluorescent lamp | Dal-Young Jeon, Kyung-ha Jee, Bok-Ki Song, Dong Myeong SHIN | 1996-03-19 |