Patent ID: 8879026

Claim:
An electronic device, comprising: a light source, providing a light beam; a light guide, comprising a light emitting surface and a light entering surface, wherein the light beam enters the light guide through the light entering surface, emitted from the light emitting surface, the light guide has an image light area and an invalid light area, and a decay ratio of the light beam in the invalid light area is 0˜15% or 85˜100%; a display unit, corresponding to the light emitting surface, wherein the light beam is partially emitted from the image light area, and passes through the display unit to display an image; an ambiance light guiding unit, corresponding to the light guide; and a frame, covering the display unit and the light guide, wherein the frame has a display portion and a transparent portion, the image is displayed in the display portion, and a portion of the light beam is sequentially emitted from the light emitting surface, guided by the ambiance light guiding unit and is emitted from the transparent portion.