Light guide plate with blunt edges

摘要

Electronic devices may include displays. A display may include display layers having an array of display pixels and a backlight unit that provides backlight illumination to the display pixels. The backlight unit may include a light guide plate that distributes light across the display layers and a stack of optical films that may be used to enhance backlight performance. The optical films may be interposed between the light guide plate and the display layers. The light guide plate may be provided with one or more rounded edges formed from curved surfaces and/or one or more beveled edges formed from chamfered surfaces. Providing the light guide plate with rounded or beveled edges may minimize abrasive contact between the light guide plate and the adjacent optical films. An injection molding tool may be used to mold a light guide plate with rounded or beveled edges.

主权项

1. A backlight assembly configured to provide backlight illumination to display layers in a display, comprising:
a light guide plate having a surface from which the backlight illumination is provided to the display layers, wherein the surface has a planar portion and a curved portion and wherein the curved portion forms a rounded edge, wherein the light guide plate has a straight edge on an opposing side of the light guide plate from the rounded edge, and wherein the light guide plate has a vertical sidewall that forms the straight edge; at least one optical film adjacent to the surface of the light guide plate; and a plurality of light-emitting diodes mounted on a substrate, wherein the light-emitting diodes are configured to emit light into the straight edge and wherein the light guide plate is attached to the substrate.