Appeal No. 2003-1482
Application No. 09/156,816
variable active vertical and horizontal resolution of the display controller and
scales the output of the display controller to the fixed resolution of the display.
The system determines the variable active horizontal resolution of the controller
by counting the pixel clock and the active vertical resolution by counting the
active horizontal lines between vertical sync pulses; see page 3 of appellants’
specification.
Claim 1 is representative of the invention:
1. A method for automatic mode detection and scaler control for a
display device digitally coupled to a display controller, the display
controller having a variable active horizontal resolution and a variable
active vertical resolution, the display device having a fixed horizontal
resolution and a fixed vertical resolution, comprising:
determining the variable active horizontal resolution of the display
controller by counting a pixel clock;
determining the variable active vertical resolution of the display
controller by counting active horizontal lines between vertical sync pulses;
and
scaling the output of the display controller, correlative to the
determined variable active horizontal resolution and the determined
variable active vertical resolution, to match the fixed horizontal resolution
and the fixed vertical resolution of the display device.
References
Reddy 5,953,074 Sep. 14, 1999
(filed Oct. 10, 1997)
Kesatoshi 5,874,937 Feb. 23, 1999
(filed Oct . 10, 1996)
2
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