Inventor
Sang Hyun Cha
Inventor
Seoul, KR
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating44%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications28%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems11%
H03KPulse technique6%
G09GArrangements or circuits for control of indicating devices using static means to present variable information3%
H03HImpedance networks, e.g. resonant circuits3%
H04BTransmission3%
H04LTransmission of digital information, e.g. telegraphic communication3%
PatentTitleYear
9,780,771'Gate driving circuit including constant current sources, and switching apparatus and power supply apparatus having the same'20179,755,502'Start-up circuit and power device using the same'20179,301,353'Light emitting diode driving apparatus'20169,287,777'Average current controller, average current control method and buck converter using the average current controller'20169,204,506'Light emitting diode driving apparatus'20159,173,265'Light emitting diode driving apparatus and light emitting diode lighting apparatus'20159,083,248'PWM control circuit, flyback converter and method for controlling PWM'20159,066,399'Illumination driving apparatus for light emitting diode and method thereof'20159,024,531'Apparatus for driving light emitting diode'20158,994,281'Light emitting diode driving apparatus'20158,981,658'Apparatus for driving light emitting diode'20158,975,824'PWM driving circuit and PWM driving method'20158,975,927'Gate driver'20158,917,025'Light emitting diode driving apparatus'20148,890,431'LED driving apparatus and method'20148,816,589'Light emitting diode driving apparatus'20148,796,942'LED circuit'20148,779,682'Illumination driving apparatus'20148,749,147'LED circuit'20148,471,788'Organic light emitting diode driver'20138,030,991'Frequency tuning and direct current offset canceling circuit for continuous-time analog filter with time divided'2011Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2011–2017Patents assigned to SAMSUNG ELECTRO MECH (20)· patent assignee history
2011Based in Yongin-si, KR· patent location history
2013–2015Patents assigned to CHA SANG HYUN (7)· patent assignee history
2013–2014Patents assigned to LEE JAE SHIN (5)· patent assignee history
2013–2014Patents assigned to LEE YEUN JOONG (5)· patent assignee history
2013–2017Based in Seoul, KR· patent location history
2014–2015Patents assigned to PARK DEUK HEE (6)· patent assignee history
2015–2017Based in Suwon-si, KR· patent location history
2015Based in Kyungki-do, KR· patent location history
2015–2016Based in Gyeonggi-do, KR· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SAMSUNG ELECTRO MECH | 20 | 2011–2017 |
| CHA SANG HYUNself | 7 | 2013–2015 |
| PARK DEUK HEE | 6 | 2014–2015 |
| LEE JAE SHIN | 5 | 2013–2014 |
| LEE YEUN JOONG | 5 | 2013–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Seoul, KR | 10 | 2013–2017 |
| Suwon-si, KR | 4 | 2015–2017 |
| Kyungki-do, KR | 4 | 2015 |
| Gyeonggi-do, KR | 2 | 2015–2016 |
| Yongin-si, KR | 1 | 2011 |