Display Circuitry with Dynamic Pixel Backlight and Backlight Sloping Control

A method of operating a system that includes a display having a backlight unit, the method comprising:

• operating the backlight unit in a dynamic pixel brightness mode, wherein the backlight unit is configured to output backlight levels that change between consecutive frames;
• operating the backlight unit in a fixed pixel brightness mode, wherein the backlight unit is configured to output a substantially constant backlight level;
• and
• enabling backlight ramping control only when the backlight unit is operating in the fixed pixel brightness mode.

A system, comprising:

• a graphics controller;
• and
• a display that is operable in first and second modes and that is coupled to the graphics controller via a display port, wherein the display comprises:
• a display timing controller;
• and
• a backlight unit that receives an enable signal from the display timing controller, wherein the display timing controller is configured to assert the enable signal while the display is transitioning from the first mode to the second mode.