Location History:
- Taoyuan County, TW (2011 - 2014)
- Taoyuan, TW (2014 - 2021)
Company Filing History:
2 out of 2,443 
2 out of 787 
1 out of 13 Years Active: 2011-2021
Title: Innovations by Yu-Min Chen
Introduction
Yu-Min Chen is a notable inventor based in Taoyuan, Taiwan. He has made significant contributions to the field of light-emitting devices, holding a total of 5 patents. His work focuses on enhancing the functionality and efficiency of LED technology.
Latest Patents
One of his latest patents is a light-emitting device driving apparatus and dimming control circuit. This LED driving apparatus includes a power stage circuit that drives an LED circuit, along with a dimming control circuit. The dimming control circuit features a duty ratio conversion circuit, a digital-to-analog conversion (DAC) circuit, an error amplifier (EA) circuit, and a modulation control circuit. The duty ratio conversion circuit converts a PWM dimming signal into a digital duty ratio signal. The DAC circuit then transforms this digital signal into an analog reference signal. The EA circuit generates an error amplified signal based on the difference between the analog reference signal and an output current-related signal. Finally, the modulation control circuit produces a PWM control signal to manage the power switch, allowing the output current to correspond to the dimming duty ratio. This innovative dimming control circuit effectively dims the LED circuit according to the PWM dimming signal.
Another significant patent is the control circuit and control method of a light-emitting device circuit. This invention regulates the output current to a predetermined level when the light-emitting device circuit is in normal operation. If the circuit is removed, the output voltage is adjusted to a predetermined voltage. Upon reconnection, the output current is again regulated to the predetermined level, ensuring consistent performance.
Career Highlights
Yu-Min Chen has worked with prominent companies such as HTC Corporation and Richtek Technology Corporation. His experience in these organizations has contributed to his expertise in the field of light-emitting devices.
Collaborations
He has collaborated with notable colleagues, including Chen-Kuang Liu and Leng-Nien Hsiu. Their joint efforts have further advanced the innovations in LED technology.
Conclusion
Yu-Min Chen's contributions to the field of light-emitting devices through his patents and collaborations highlight his role as a significant inventor. His work continues to influence advancements in LED technology and dimming control methods.