Jan L Van Koesveld

Title: Jan L. Van Koesveld and Phosphor Innovations

Introduction

Jan L. Van Koesveld is an inventor associated with Eindhoven, the Netherlands, and U.S. Philips Corporation. His patent work includes display technologies that use specialized phosphors to produce efficient, carefully controlled light. The supplied information lists 2 patents.

Latest Patents

“Cathode-Ray Tube Provided with a Luminescent Indium Orthoborate” describes a cathode-ray tube with a screen containing chromium-activated luminescent indium orthoborate. The material enables efficient emission in the near-infrared spectrum. The patent also describes adding europium as an activator to produce Eu³⁺ emission alongside the chromium emission.

“Display Tube with Terbium-Activated Blue-Luminescing Phosphor Screen” concerns a display tube whose screen uses a terbium-activated blue phosphor and a filter. By selecting the phosphor’s emission characteristics and filtering specific wavelengths, the design aims to produce a well-saturated blue image with satisfactory energy efficiency.

Career Highlights

Van Koesveld’s listed inventions focus on cathode-ray tubes, display screens, phosphor materials, and the control of emitted light. Together, they illustrate approaches to improving spectral output and color performance in display technology.

Collaborations

The supplied information identifies U.S. Philips Corporation as Van Koesveld’s company and Roelof Egbert Schuil as a coworker. It does not specify the nature of their collaboration.

Conclusion

Jan L. Van Koesveld’s listed patents address phosphor-based innovations for efficient near-infrared emission and saturated blue display output.