US Patent 7432899 Driving scheme for cholesteric liquid crystal display

Patent 7432899 was granted and assigned to Industrial Technology Research Institute on October, 2008 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Industrial Technology Research Institute

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7432899

Patent Inventor Names

David M. Johnson0

Date of Patent

October 7, 2008

Patent Application Number

10845704

Date Filed

May 14, 2004

Patent Primary Examiner

‌

David L Lewis

Patent abstract

A drive scheme is described for a display capable of gray scale. Multiple two-level pulses are used in conjunction with dynamic relaxation techniques to write pixels ON or OFF and to adjust the gray level of pixels. Only two voltage levels are used, a maximum level U, and a minimum level 0. This reduces the complexity of the electronics so that the only one voltage generator is needed for the display.