Woon Ii Choi

Title: Woon Ii Choi: Innovator in Pixel Circuit Technology

Introduction

Woon Ii Choi is a notable inventor based in Sunnyvale, California. He has made significant contributions to the field of semiconductor technology, particularly in the development of advanced pixel circuits.

Latest Patents

Woon Ii Choi holds a patent for a "Tri-gate charge transfer block structure in time of flight pixel." This innovative pixel circuit incorporates a photodiode made from semiconductor material, which accumulates image charge in response to incident light. The design features a tri-gate charge transfer block that includes a single shared channel region within the semiconductor material. The circuit is equipped with a transfer gate, shutter gate, and switch gate, all strategically positioned near the shared channel region. The transfer gate is responsible for transferring the image charge from the photodiode to the shared channel region upon receiving a transfer signal. The shutter gate then moves the image charge from the shared channel region to a floating diffusion in the semiconductor material in response to a shutter signal. Finally, the switch gate connects the shared channel region to a charge storage structure in the semiconductor material when activated by a switch signal.

Career Highlights

Woon Ii Choi is currently employed at OmniVision Technologies, Inc., where he continues to work on innovative technologies in the semiconductor industry. His expertise and contributions have been instrumental in advancing pixel circuit designs.

Collaborations

Woon Ii Choi collaborates with fellow inventor Sohei Manabe, working together to push the boundaries of technology in their field.

Conclusion

Woon Ii Choi's work in pixel circuit technology exemplifies innovation and creativity in the semiconductor industry. His contributions, particularly through his patent, highlight the importance of advancements in imaging technology.