Company Filing History:
1 out of 24 
2 out of 832,880 Years Active: 1995-1998
Title: Innovations of James G. Hagerman
Introduction
James G. Hagerman is an accomplished inventor based in San Diego, CA. He holds a total of 3 patents that showcase his expertise in the field of illumination measurement and image projection technology. His innovative contributions have significantly advanced the capabilities of liquid crystal light valve projectors.
Latest Patents
Hagerman's latest patents include a "Method and apparatus for measuring illumination uniformity of a liquid." This system is designed to measure the illumination uniformity of a liquid light value (LCLV) projector. It features a projection device that reflects light from the first LCLV to form an image on a screen. An image sensing device is employed to sense illumination values for various portions of the image. A processor, coupled to both the image sensing device and the projection device, determines an optimum voltage bias to maximize illumination for the image pixels. This system can independently measure illumination non-uniformity from the LCLV and other sources, thereby improving the quality of the displayed image.
Another notable patent is for "Bias drive and noise reduction in image projectors." This invention introduces improved bias drive and noise reduction techniques for liquid crystal light valve image projectors. The bias drive circuit produces a square wave-like signal to drive the liquid crystal light valve, synchronized with the vertical refresh signal of the projector. A frequency synthesizer is utilized to interlace noise, effectively reducing unwanted visual noise effects in the displayed image. The invention also includes an optional variable gain circuit to adjust the amplitude of the bias provided to the liquid crystal light valve.
Career Highlights
Throughout his career, James G. Hagerman has made significant contributions to the field of image projection technology. His work has been instrumental in enhancing the performance and quality of projection systems.
Collaborations
Hagerman has collaborated with various companies, including Hughes-JVC Technology Corporation, where he applied his innovative ideas to develop advanced projection technologies.
Conclusion
James G. Hagerman's contributions to the field of illumination measurement and image projection have established him as a notable inventor. His patents reflect a commitment to improving technology and enhancing user experience in image projection systems.