Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2005-11-29
2005-11-29
Nguyen, John B (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S145000, C345S087000, C345S098000, C345S204000
Reexamination Certificate
active
06970121
ABSTRACT:
Digital to analog converters (DAC). A first MSB DAC receives MSB data of a first digital video signal in a first clock period, and outputs a first voltage range signal. A second MSB DAC receives MSB data of a second digital video signal in a second clock period, and outputs a second voltage range signal. A delay circuit receives LSB data of the first digital video signal in the first clock period, and outputs the signal in the second clock period. A LSB DAC outputs first image data according to the first voltage range signal and the LSB data of the first digital video signal in the second clock period. A first switch is connected between the first MSB DAC and the LSB DAC, and is turned on to provide the first voltage range signal to the LSB DAC in the second clock period.
REFERENCES:
patent: 6154121 (2000-11-01), Cairns et al.
patent: 6256024 (2001-07-01), Maekawa
patent: 6556162 (2003-04-01), Brownlow et al.
patent: 6750835 (2004-06-01), Azami
patent: 6756959 (2004-06-01), Fujino
AU Optronics Corp.
Nguyen John B
Thomas Kayden Horstemeyer & Risley
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