Location History:
- San Ramon, CA (US) (1987)
- Burlingame, CA (US) (1988)
Company Filing History:
Years Active: 1987-1988
Title: Chein-Hwa S Tsao: Innovator in Printing Technology
Introduction
Chein-Hwa S Tsao is a prominent inventor based in San Ramon, CA (US). She has made significant contributions to the field of printing technology, holding 2 patents that showcase her innovative approach to liquid ink printing.
Latest Patents
One of her latest patents is titled "Spot deposition for liquid ink printing." This method involves depositing spots of liquid ink on selected pixel centers of a substrate that has poor ink absorptive properties. The technique prevents the flow of liquid ink from one spot to an overlapping adjacent one. The printing process is executed in at least two passes, creating a checkerboard pattern where only diagonally adjacent pixel areas are deposited in the same pass. The complementary checkerboard pattern is then deposited on the second pass, ensuring that ink is not deposited on horizontally or vertically adjacent pixel areas during a single pass.
Another notable patent is the "Thermal transfer printing system." This system features a print scanning head equipped with a series of thermal heating elements aligned in a column perpendicular to the line of printing. A sensor determines the alignment of the scanning head relative to the line of printing. The system includes more heating elements than necessary for printing, activating only those that are properly aligned with the line of printing.
Career Highlights
Chein-Hwa S Tsao is currently employed at Xerox Corporation, where she continues to develop innovative printing solutions. Her work has significantly impacted the efficiency and quality of printing technologies.
Collaborations
Throughout her career, she has collaborated with notable colleagues, including Larry W Lin and Stuart L Claassen. These collaborations have further enhanced her contributions to the field.
Conclusion
Chein-Hwa S Tsao is a trailblazer in the printing technology sector, with her patents reflecting her commitment to innovation. Her work at Xerox Corporation and her collaborations with esteemed colleagues underscore her influence in the industry.