Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2004-01-30
2008-12-30
Shankar, Vijay (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S089000, C345S690000
Reexamination Certificate
active
07471272
ABSTRACT:
A display device (1) comprising: a liquid crystal display (2) having pixels (8) which are arranged in columns C and rows R; and a gate driving arrangement (4) for activating the pixels (8) of rows (R) in dependence on a row scanning scheme; a source driving arrangement (3) for providing column voltages representing the respective image data, a number of buffers (40) depending on the number of grey levels for supplying the respective voltage levels to the columns (C), a switching unit (31) for selecting a voltage level which corresponds to the grey level to be displayed; and a control unit (32) for controlling the buffers (40). For reducing the power consumption, an analyzing unit (39) is provided which analyzes the image data to be displayed such that the control unit (32) can determine the number of required buffers in dependence on the number of grey levels to be displayed and can switch off any unused buffers.
REFERENCES:
patent: 6756961 (2004-06-01), Hector et al.
patent: 2002/0135551 (2002-09-01), Zeiter et al.
patent: 2003/0112212 (2003-06-01), Speirs
patent: 1 318 500 (2003-06-01), None
Oelhafen Patrick
Radovic Marko
Speirs Christopher Rodd
NXP B.V.
Shankar Vijay
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