Company Filing History:
Years Active: 2003
Title: Innovations of Charles M C Tan
Introduction
Charles M C Tan is a notable inventor based in Santa Clara, CA. He has made significant contributions to the field of imaging technology, holding a total of 3 patents. His work primarily focuses on enhancing the capabilities of image sensors, which are crucial in various applications.
Latest Patents
One of his latest patents is for a CMOS active pixel sensor having in-pixel local exposure control. This innovative system and method for imaging a scene of interest utilize variable exposure periods based on detecting a fixed voltage drop. This approach allows for determining the scene segment radiance, where high radiant scene segments yield faster voltage drops than lower radiant scene segments. The variable exposure period is determined within each pixel of the pixel array, enabling the gathering of exposure periods from different segments of the scene being imaged. The measured exposure periods are translated into grayscale information, which can be used to generate a composite image representative of the imaged scene. Each pixel includes a photo sensor, an analog-to-digital converter, and a memory to measure, digitize, and store the exposure period. The memory contains a number of memory cells with a three-transistor configuration, allowing for non-destructive read-outs of data stored in the memory cells.
Another significant patent is for a photo diode pixel sensor array having a guard ring. This image sensor array includes a substrate with an array of photo diode sensors electrically interconnected to it. The photo diode sensors conduct charge at a rate proportional to the intensity of light they receive. A ring of guard diodes is located around the periphery of the array, enhancing the performance and reliability of the image sensor.
Career Highlights
Charles M C Tan is currently employed at Agilent Technologies, Inc., where he continues to innovate and develop advanced imaging technologies. His work has had a profound impact on the field, contributing to the advancement of image sensor technology.
Collaborations
Throughout his career, Charles has collaborated with notable colleagues, including Frederick A Perner and Min Cao. These collaborations have further enriched his work and led to significant advancements in imaging technology.
Conclusion
Charles M C Tan is a distinguished inventor whose contributions to imaging technology have been recognized through his patents and collaborations. His innovative work continues to influence the field and drive advancements in image sensor technology.