Invention Grant
- Patent Title: Energy saving passive matrix display device and method for driving the column voltage having reduced transitions
- Patent Title (中): 节能无源矩阵显示装置和驱动具有减少的转换的列电压的方法
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Application No.: US10559914Application Date: 2004-05-27
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Publication No.: US07880704B2Publication Date: 2011-02-01
- Inventor: Christopher Rodd Speirs , Martin Lienhard
- Applicant: Christopher Rodd Speirs , Martin Lienhard
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Priority: EP03101708 20030612
- International Application: PCT/IB2004/050790 WO 20040527
- International Announcement: WO2004/111987 WO 20041223
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
Method of driving a liquid crystal display by supplying selectable column voltages Gj(t) from a predetermined number of column voltages levels, selection signals to groups of mutually orthogonal p rows (p≧1) for the duration of a row selection time p×nfrc during a supcrframe nfrc to generate grey scales. The column voltage is calculated depending on the grey scales of the p pixels in a column and on the mutually orthogonal selection signals Fi for the corresponding group of rows. The row selection time is subdivided in npwm sub selection time. The grey scales are coded in grey scale tables having nfrc phases with npwm. The superframes grey scales are generated using phase mixing. The change in the column voltage level defines a transition. The column voltage has always less transitions per row selection time than the number npwm of sub selection time of the row selection time.
Public/Granted literature
- US20060274004A1 Energy saving passive matrix display device and method for driving Public/Granted day:2006-12-07
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