Light guide structures for display backlights

An electronic device, comprising:

• a housing having a rear surface;
• a display mounted in the housing, wherein the display includes an active area surrounded by an inactive area;
• a button located in the inactive area of the display;
• and
• a backlight assembly configured to provide backlight illumination for the display, wherein the backlight assembly includes:
• a light guide plate having a surface from which the backlight illumination is provided to the display;
• a light guide structure coupled to the light guide plate;
• and
• a plurality of light sources coupled to the light guide structure, wherein the light guide structure is configured to guide light from the light sources to the light guide plate via total internal reflection, wherein the light guide structure comprises opposing upper and lower curved surfaces that curve away from the button to accommodate the button, wherein at least one of the light sources is interposed between the button and the rear surface of the housing, and wherein the at least one light source is located directly below the button in the inactive area.