Inventor
WONG PITLEONG
CN41 patents
⚠️ This page may combine multiple inventors who share the name “WONG PITLEONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
JOULWATT TECH HANGZHOU CO LTD
26 patentsUS10153684B2Dec 11, 2018
Bleeder circuit
JOULWATT TECH HANGZHOU CO LTD37 citations92
US10461653B1Oct 29, 2019
Active-clamp flyback circuit and control method thereof
JOULWATT TECH HANGZHOU CO LTD14 citations86
US10505442B2Dec 10, 2019
Synchronous rectification control circuit, method and flyback switch circuit
JOULWATT TECH HANGZHOU CO LTD16 citations85
US10644604B2May 5, 2020
Flyback switching power supply
JOULWATT TECH HANGZHOU CO LTD9 citations84
US10143051B2Nov 27, 2018
Bleeder circuit and control method thereof, and LED control circuit
JOULWATT TECH HANGZHOU CO LTD7 citations84
US10205448B2Feb 12, 2019
Switch control circuit and switch circuit
JOULWATT TECH HANGZHOU CO LTD3 citations73
US10199949B1Feb 5, 2019
Active-clamp flyback circuit and control method thereof
JOULWATT TECH HANGZHOU CO LTD6 citations73
US10090750B1Oct 2, 2018
Isolating switch circuit and control method thereof
JOULWATT TECH HANGZHOU CO LTD6 citations73
US10411685B2Sep 10, 2019
Circuit and method for detecting current zero-crossing point, and circuit and method for detecting load voltage
JOULWATT TECH HANGZHOU CO LTD4 citations72
US10396658B2Aug 27, 2019
Power supply protection circuit and method
JOULWATT TECH HANGZHOU CO LTD4 citations72
US10355604B2Jul 16, 2019
Control circuit and control method for switch circuit and switching-mode power supply circuit
JOULWATT TECH HANGZHOU CO LTD5 citations72
US10320291B2Jun 11, 2019
Control circuit and device with edge comparison for switching circuit
JOULWATT TECH HANGZHOU CO LTD2 citations72
US10298129B1May 21, 2019
Power supplying circuit for drive of switching power supply and switching power supply
JOULWATT TECH HANGZHOU CO LTD4 citations72
US10218272B2Feb 26, 2019
Control circuit and control method for switch power supply, and switch power supply
JOULWATT TECH HANGZHOU CO LTD2 citations72
US11165355B2Nov 2, 2021
Clamping switch abnormality detection method, clamping switch abnormality detection circuit and switch circuit
JOULWATT TECH HANGZHOU CO LTD3 citations70
US11463079B2Oct 4, 2022
Power transistor driving method, driving circuit and switching circuit
JOULWATT TECH HANGZHOU CO LTD1 citations61
US10075152B2Sep 11, 2018
Integrated circuit with multiplexed pin and pin multiplexing method
JOULWATT TECH HANGZHOU CO LTD1 citations52
US11218136B2Jan 4, 2022
Power transistor driving method, driving circuit and switching circuit
JOULWATT TECH HANGZHOU CO LTD0 citations50
US10886913B2Jan 5, 2021
Drive method and drive circuit for power switch, and power supply system
JOULWATT TECH HANGZHOU CO LTD0 citations50
US11152866B2Oct 19, 2021
Active clamping flyback circuit and control method thereof
JOULWATT TECH HANGZHOU CO LTD0 citations49
US10506684B2Dec 10, 2019
Protection circuit and illumination driving circuit
JOULWATT TECH HANGZHOU CO LTD0 citations42
US10418910B2Sep 17, 2019
Isolated switch-mode power supply and control circuit and control method for isolated switch-mode power supply
JOULWATT TECH HANGZHOU CO LTD0 citations42
US10263610B2Apr 16, 2019
Control method and control circuit for switch circuit and switch circuit device
JOULWATT TECH HANGZHOU CO LTD0 citations41
US10715125B2Jul 14, 2020
Circuit and method for detecting current zero-crossing point and circuit and method for detecting load voltage
JOULWATT TECH HANGZHOU CO LTD0 citations40
US10411586B2Sep 10, 2019
Circuit and method for overcurrent control and power supply system including the same
JOULWATT TECH HANGZHOU CO LTD0 citations40
US10327296B2Jun 18, 2019
Dimming circuit, dimming method and LED driving circuit
JOULWATT TECH HANGZHOU CO LTD0 citations40
JOULWATT TECH CO LTD
12 patentsUS12444343B2Oct 14, 2025
LED driver circuit, multi-wire communication device and method for LED display system
JOULWATT TECH CO LTD2 citations74
US12057080B2Aug 6, 2024
Light source driving circuit and communication device for display system
JOULWATT TECH CO LTD4 citations73
US12451891B2Oct 21, 2025
Switching frequency synchronization circuit, method therefor and switching power supply
JOULWATT TECH CO LTD0 citations62
US11757367B2Sep 12, 2023
Flyback switch circuit and control method thereof
JOULWATT TECH CO LTD1 citations62
US12087243B2Sep 10, 2024
Light source driving circuit and communication device for display system
JOULWATT TECH CO LTD0 citations61
US12431786B2Sep 30, 2025
Control circuit and control method for switched capacitor converter
JOULWATT TECH CO LTD0 citations52
US12317382B2May 27, 2025
Dimming method and dimming circuit
JOULWATT TECH CO LTD0 citations52
US12477633B2Nov 18, 2025
Power conversion circuit for quick response and switching power supply
JOULWATT TECH CO LTD0 citations51
US12483148B2Nov 25, 2025
Flyback converter with high efficiency and control method thereof
JOULWATT TECH CO LTD0 citations49
US12221033B2Feb 11, 2025
Dynamic automotive turn signal circuit and dynamic automotive turn signal system
JOULWATT TECH CO LTD0 citations48
US11799310B2Oct 24, 2023
X-capacitor discharge method, X-capacitor discharge circuit and switched-mode power supply
JOULWATT TECH CO LTD0 citations45
US12407249B2Sep 2, 2025
Supply circuit and switched mode power supply
JOULWATT TECH CO LTD0 citations41