Restricting light leakage

摘要

A device with a display and a front light guide layer above the display providing illumination for the display, with a light barrier to prevent light leakage from the front light guide layer. A light source introduces light into the front light guide layer, which distributes light evenly throughout itself, and emits light from its edges. A light barrier, such as a foam or epoxy layer, prevents any extraneous light from escaping the device.

主权项

1. A device comprising:
a reflective display; a light source; a light guide layer optically coupled to the light source, and above the reflective display, wherein the light guide layer propagates light emitted from the light source for illuminating the reflective display; and a cavity between the light guide layer and a non-reflective light barrier, wherein at least a portion of the light guide layer forms at least part of a first wall of the cavity and the light barrier forms at least part of a second wall of the cavity, wherein the light barrier prevents light propagated from the light guide layer into the cavity from escaping the cavity.