John S Prince

Title: John S. Prince: Innovator in Video Display Technology

Introduction

John S. Prince is a notable inventor based in Vestal, NY (US), recognized for his contributions to video display technology. He has been instrumental in developing systems that enhance the performance of cathode ray tube (CRT) displays. His innovative approach has led to the creation of a patent that addresses the challenges of brightness control in video displays.

Latest Patents

John S. Prince holds a patent for a "Brightness Control System for CRT Video Display." This invention features a video brightness control system designed for high-performance CRT displays. It includes a buffer amplifier that receives high-speed video information and applies it to a gain control variable resistor, which serves as a contrast control. The system utilizes an ambient light sensor that drives a nonlinear amplifier to provide an ambient light signal proportional to the logarithm of the ambient light level over a wide range. Additionally, a manual brightness control potentiometer is adjustable to maintain a constant brightness signal. The combination of video information, ambient light signal, and manual brightness control signal is processed by a summing device, resulting in a signal that approximates a logarithmic characteristic. This output is then applied to a gamma correction amplifier, which drives a video driver amplifier, ultimately controlling the CRT. The system achieves automatic brightness control based on ambient light levels, minimizes interaction between brightness and contrast controls, and approximates the brightness difference threshold of the human eye.

Career Highlights

Throughout his career, John S. Prince has made significant contributions to the field of video technology while working at General Electric Company. His innovative work has not only advanced CRT display technology but has also set a foundation for future developments in video display systems.

Collaborations

John has collaborated with esteemed colleagues such as Harold L. Herz and Edward P. Coleman, Jr. Their combined expertise has contributed to the successful development of advanced technologies in the field.

Conclusion

John S. Prince's innovative work in video display technology, particularly his patented brightness control system, showcases his commitment to enhancing user experience in visual technology. His contributions continue to influence the industry and pave the way for future advancements.