Company Filing History:
Years Active: 1999-2002
Title: Jeffrey Herbert Harrell: Innovator in Electrophotographic Screen Technology
Introduction
Jeffrey Herbert Harrell is a notable inventor based in Marion, Indiana, recognized for his contributions to the field of electrophotographic screen technology. With a total of 2 patents to his name, Harrell has developed innovative methods that enhance the manufacturing processes of luminescent screens for cathode-ray tubes (CRTs).
Latest Patents
Harrell's latest patents include a groundbreaking method for manufacturing a luminescent screen assembly for CRTs. This invention involves a filming process for electrophotographic screen (EPS) formation, where color-emitting phosphors are sequentially deposited on the interior surface of a CRT faceplate panel. The filming composition used in this process is electrostatically sprayed and consists of an acrylic polymer dissolved in a mixture of high-volatility and low-volatility solvents.
Another significant patent by Harrell details a method for manufacturing a phosphor screen for CRTs. This method includes the steps of coating the interior surface of a viewing faceplate panel to create a volatilizable organic conductive (OC) layer, followed by the formation of a volatilizable organic photoconductive (OPC) layer. The OPC layer is electrostatically charged, and selected areas are exposed to light to create a charge image, which is then developed with phosphor material.
Career Highlights
Throughout his career, Jeffrey Harrell has worked with prominent companies such as Thomson Licensing S.A. and Thomson Consumer Electronics Inc. His experience in these organizations has contributed to his expertise in the field of electrophotographic technologies.
Collaborations
Harrell has collaborated with notable individuals in his field, including Himanshu Mukundray Patel and Charles Henry Knepfler. These collaborations have likely enriched his work and contributed to the development of his innovative patents.
Conclusion
Jeffrey Herbert Harrell's contributions to electrophotographic screen technology demonstrate his innovative spirit and dedication to advancing manufacturing processes. His patents reflect a deep understanding of the complexities involved in creating high-quality luminescent screens for CRTs.