Extended power management via frame modulation control
AssigneeATI Technologies, Inc.
InventorI-Cheng Chen
Life of this patent
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Abstract
Power consumption in a portable computer device that provides true-color simulation on a liquid crystal display can be realized by selectively operating a graphics controller that drives the LCD to selectively enable or disable true color simulation. Disabling dithering which provides true color simulation in an LCD, can significantly reduce power consumption by a portable computer device.
Claims19
A method for providing user-specified power management in a portable computer device having a graphics controller and a liquid crystal display on which content is displayed comprised of:
- enabling a user to select either a dithering mode of operation for said graphics controller or a non-dithering mode of operation for said graphics controller so as to reduce power consumption by said liquid crystal display;
- and
- wherein the dither mode of operation includes changing a color of a pixel in successive frames.
A method for providing user-specified power management in a portable computer device having a graphics controller and a liquid crystal display on which content is displayed comprised of:
- providing a software-controlled user interface for said graphics controller;
- enabling a user, via said user interface, to control said graphics controller to be operable in a graphics dithering mode providing at least a simulated true-color output on said liquid crystal device, or in a reduced-power-consumption, non-dithering mode of operation for said liquid crystal device.
A method for providing user-specified power management in a portable computer device having a graphics controller and a liquid crystal display comprised of:
- detecting when said portable computer device is operated from a battery;
- selectively operating the graphics controller in either a true-color simulating graphics dithering mode or a non-dithering mode of operation so as to reduce power consumption by said liquid crystal display.
A method for providing user-specified power management in a portable computer device having a graphics controller and a liquid crystal display comprised of:
- detecting when said portable computer device is operated from a battery;
- determining when said portable computer device is displaying on said liquid crystal display, content that contains color;
- if said content contains color, selectively operating the graphics controller in either a graphics dithering mode to render true-color simulation, or a non-dithering mode of operation for so as to reduce power consumption by said liquid crystal display.
A portable computer device having a liquid crystal display comprised of:
- a central processor means, providing a software controlled power management user interface;
- a graphics controller operably coupled to the central processor, said graphics controller being operable via said user interface in a graphics dithering mode to provide a true-color simulation by said liquid crystal display, or a non-dithering mode of operation to reduce power consumption by said liquid crystal display.
A method for providing user-specified power management in a portable computer device having a graphics controller and a liquid crystal display on which content is displayed comprised of:
- enabling a user to select either a dithering mode of operation for said graphics controller or a non-dithering mode of operation for said graphics controller so as to reduce power consumption by said liquid crystal display;
- wherein the dither mode of operation includes changing a color of a pixel in successive frames;
- and
- wherein said graphics controller dithering modes display successive frames of differently-colored shades so as to provide a true-color simulation.
Dependencies are inferred from the claim text.