Pieter Grootes

Title: The Innovations of Pieter Grootes

Introduction

Pieter Grootes is a notable inventor based in Best, Netherlands. He has made significant contributions to the field of LED technology, particularly in the development of backlighting systems for LCDs. With a total of two patents to his name, Grootes has demonstrated a commitment to enhancing the performance and longevity of LED lighting solutions.

Latest Patents

Grootes' latest patents include an innovative LED backlight for LCDs that features color uniformity recalibration over its lifetime. This invention describes an LED light source that recalibrates itself over time to maintain color and brightness uniformity across the backlight. The design incorporates clusters of red, green, and blue LEDs, each generating a white point. Each color in a cluster has its own controllable driver, allowing for separate control of brightness. Optical sensors are arranged within the backlight to detect light output, and processing circuitry adjusts the currents to the RGB LEDs to achieve the target levels. This recalibration process occurs at various intervals throughout the backlight's lifespan to counteract LED degradation.

Another patent by Grootes involves an LED backlight structure with integrated electronics for setting voltages and currents for LEDs. In this design, red, green, and blue LEDs are connected in series with voltage regulators and controllable current sources. The current sources balance the three colors to achieve a target light output using a light detection chamber. PWM controllers manage transistor switches across groups of LEDs, controlling brightness levels and ensuring optimal performance for applications such as LCD televisions.

Career Highlights

Throughout his career, Pieter Grootes has worked with prominent companies in the lighting industry, including Philips Lumileds Lighting Company and Koninklijke Philips Corporation. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking advancements in LED technology.

Collaborations

Grootes has collaborated with notable professionals in the field, including Noboru Kaito and Robert F. M. Hendriks. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Pieter Grootes is a distinguished inventor whose work in LED backlighting technology has significantly impacted the industry. His innovative patents reflect a deep understanding of the challenges associated with LED performance and longevity. Through his contributions, Grootes continues to pave the way for advancements in lighting solutions.