Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2008-05-27
2008-05-27
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S118000, C341S145000, C341S154000, C345S084000, C345S087000, C345S088000, C345S089000, C345S099000, C345S100000
Reexamination Certificate
active
07379004
ABSTRACT:
An LCD driving circuit and method for increasing effective bit(s) of the source driver is disclosed. A reference voltage generator generates a group of compensated reference voltage levels that are interlaced with original reference voltage level of original reference voltage generator. One of the multiple groups of reference voltage levels is selected by one or more least significant bits (LSBs), and is then inputted to digital-to-Analog converter of the source driver under control of the one or more least significant bits (LSBs), thereby effectively and economically enhancing the gray levels of the display on the LCD panel.
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Chen Chun-chieh
Hsu Chin-Hung
Lee Ming-Lin
Lu Nan-Ku
Birch & Stewart Kolasch & Birch, LLP
HannStar Display Corp.
Nguyen Khai M
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