Company Filing History:
Years Active: 1997-2000
Title: Innovations of De-An Chang in Phosphor Screen Technology
Introduction
De-An Chang is a notable inventor based in Hsinchu, Taiwan. He has made significant contributions to the field of phosphor screen technology, holding a total of 5 patents. His work focuses on improving the manufacturing processes of phosphorescent screens used in various display technologies.
Latest Patents
One of his latest patents is a low-temperature method for phosphor screen formation. This process describes the manufacturing of a phosphorescent screen for use in cathode ray or field emission displays. The phosphor layer is applied as a slurry consisting of powdered phosphor, an ethylene glycol monobutyl ether acetate solvent, and a cellulose acetate butyrate binder. The composition of the slurry is critical, with phosphor concentration ranging from 30 to 60% by weight, solvent between 5 and 52.5%, and binder between 17.5 and 35%. By maintaining the firing temperature below 500 degrees Celsius, roughening of the aluminum anode layer is avoided, resulting in a more efficient screen.
Another significant patent involves the screen printing of surface layers. This formulation includes solid powder, a solvent system, a binder material, and a plasticizing agent. The accomplishment is achieved through a step-by-step process, allowing the pastes to be employed in screen printing to produce surface layer patterns with desired physical properties such as phosphorescence, electrical conductivity, mechanical adhesion, and dielectric properties.
Career Highlights
De-An Chang is affiliated with the Industrial Technology Research Institute, where he continues to innovate in the field of display technologies. His work has been instrumental in advancing the efficiency and effectiveness of phosphor screens.
Collaborations
He has collaborated with notable coworkers, including Jin-Yuh Lu and Yui-Shin Fran, who contribute to the research and development efforts in their projects.
Conclusion
De-An Chang's contributions to phosphor screen technology demonstrate his innovative spirit and commitment to advancing display technologies. His patents reflect a deep understanding of materials and processes that enhance the performance of modern displays.