Company Filing History:

23 out of 21,361

Koninklijke Philips Corporation N.v.

patents

17 out of 838

Philips Electronics North America Corporation

U.S. Philips Corporation

patents

Years Active: 1998-2013

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44 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8427126 - Digital control of PWM converters with nonlinear gain scheduling (2013-04-23),

2. 8344703 - Variable on-time control method for high light-load efficiency, small output voltage ripple, and audible-noise-free operation (2013-01-01),

3. 7593567 - Transformation structures for approximating color matching functions (2009-09-22),

4. 7508182 - Method and apparatus for improved current mode control for large conversion ratio synchronous buck converter with lossless current sense (2009-03-24),

5. 7443209 - PWM LED regulator with sample and hold (2008-10-28),

6. 6992803 - RGB primary color point identification system and method (2006-01-31),

7. 6894675 - Seamless highlighting in LCD monitors and LCD-TV (2005-05-17),

8. 6888529 - Control and drive circuit arrangement for illumination performance enhancement with LED light sources (2005-05-03),

9. 6784867 - Voltage-fed push LLC resonant LCD backlighting inverter circuit (2004-08-31),

10. 6768047 - Autonomous solid state lighting system (2004-07-27),

11. 6753661 - LED-based white-light backlighting for electronic displays (2004-06-22),

12. 6734639 - Sample and hold method to achieve square-wave PWM current source for light emitting diode arrays (2004-05-11),

13. 6635817 - Solar cell array having lattice or matrix structure and method of arranging solar cells and panels (2003-10-21),

14. 6621235 - Integrated LED driving device with current sharing for multiple LED strings (2003-09-16),

15. 6600562 - Method of extended color sense and estimation for RGB LED illuminants (2003-07-29),

Title: Innovations by Chin Chang: Pioneering Advances in Power Converter Technology

Introduction

Chin Chang is a notable inventor based in Yorktown Heights, NY, with an impressive portfolio of 44 patents. His contributions to the field of power electronics have significantly advanced the efficiency and performance of power converters. Chang's innovative approaches are characterized by their ability to address both engineering challenges and practical applications in various electronic devices.

Latest Patents

Among his latest patents, two stand out for their ingenuity and technical depth:

1. **Digital Control of PWM Converters with Nonlinear Gain Scheduling** - This patent describes a system and method for controlling a digital pulse-width modulated power converter. It achieves a fast large-signal transient response while maintaining stability in the system near steady-state operating points. The invention incorporates a gain scheduling block that employs a non-linear gain function, resulting in a delicate balance of strong and weak loop responses. This ensures the converter maintains a quick transient response to large error signals while minimizing noise and improving loop stability.

2. **Variable On-Time Control Method for High Light-Load Efficiency** - This apparatus and method address the efficiency of power converters, particularly at light loads. The invention ensures reduced output voltage ripple while providing operation free from audible noise. The variable on-time control circuit can be applied across various switching mode converters, including boost, buck, buck-boost, and single-ended primary inductor (SEPIC).

Career Highlights

Chin Chang has worked with prominent companies in the electronics sector, notably Koninklijke Philips Corporation N.V. and Philips Electronics North America Corporation. His work at these firms has laid the foundation for his innovative contributions, placing him at the forefront of technological advancements in power conversion.

Collaborations

Throughout his career, Chin has collaborated with talented individuals such as Gert W. Bruning and Subramanian Muthu. These partnerships have enriched his work, fostering an environment conducive to collaboration and innovation in the area of power electronics.

Conclusion

Chin Chang's contributions to the development of efficient and stable power converter technologies exemplify his dedication and expertise in the field. With 44 patents to his name, he continues to pave the way for innovation in electronics, making a profound impact on both the industry and its future developments. His work not only enhances device performance but also reflects the ongoing transformation within power management technologies.

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