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US 2010/0141633 A1Published application
Embedded Display Power Management
AssigneeSynaptics Incorporated
InventorDimitry Goder
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Abstract
An integrated circuit is disclosed that includes a display management circuitry configured to control the operation of a display panel in combination with a power management circuitry configured to control the power consumption of a panel backlight.
Claims12
An integrated circuit comprising:
- display management circuitry configured to control the operation of a display panel;
- and
- power management circuitry configured to control the power consumption of a panel backlight from an overvoltage and a feedback voltage measured from the panel backlight.
A method of controlling power to a display, comprising:
- starting power to a LED array;
- checking a low-frequency pulse-width modulation (LPWM) signal and, on a high condition,
- compare a feedback voltage with a first threshold voltage to provide a first digital signal,
- compare an overvoltage signal with a second threshold voltage to provide a second digital signal, and
- adjust a duty cycle and a dither for a digital pulsed width modulation (DPWM) signal in response to the first digital signal and the second digital signal;
- and
- on a low condition,
- setting the DPWM signal to low, and
- saving the SPWM duty cycle.
6 more elements
Dependencies are inferred from the claim text.