Patent ID: 11967290
Assignee: APPLE INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. A method comprising:
receiving a target brightness for a plurality of light-emitting diode rows of a backlight of an electronic display;
determining a transition curve between a present brightness and the target brightness;
interpolating, on the transition curve, a sloped brightness for the plurality of light-emitting diode rows based at least in part on the present brightness, the target brightness, and a temperature of the plurality of light-emitting diode rows;
estimating a power consumption for a light-emitting diode row of the plurality of light-emitting diode rows based at least in part on the sloped brightness;
receiving stored power consumption for other light-emitting diode rows of the plurality of light-emitting diode rows;
determining a total power consumption for the plurality of light-emitting diode rows based on the power consumption estimated for the light-emitting diode row and the stored power consumption for the other light-emitting diode rows;
determining that the total power consumption for the plurality of light-emitting diode rows exceeds a threshold power consumption;
in response to determining that the total power consumption for the plurality of light-emitting diode rows exceeds the threshold power consumption:
receiving or determining a current to supply to one or more light-emitting diodes of the plurality of light-emitting diode rows;
determining a reduced voltage level to supply to the one or more light-emitting diodes based on the current of the one or more light-emitting diodes, wherein the reduced voltage level is less than a uniform voltage used for other light-emitting diodes of the plurality of light-emitting diode rows and is greater than a minimum voltage of the one or more light emitting diodes of the plurality of light-emitting diode rows; and
supplying the current and the reduced voltage level to the one or more light-emitting diodes; and

in response to receiving an indication of a new image frame comprising one or more pixel values to be written to one or more pixels of a liquid crystal display panel:
sending an interrupt, via a controller of the liquid crystal display panel, to the backlight to prevent updating the one or more light-emitting diodes of the plurality of the light-emitting diodes, wherein the one or more light-emitting diodes corresponds to the one or more pixels of the liquid crystal display panel;
cancelling the interrupt, via the controller of the liquid crystal display panel, after the one or more pixel values are written to the one or more pixels of the liquid crystal display panel and the one or more pixels settling; and
in response to cancelling the interrupt, updating the one or more light-emitting diodes corresponding to the one or more pixels based on the one or more pixel values.