Light guide plate and emergency light comprising the same

Abstract

A light guide plate including a light guide casing and a reflective layer. The light guide casing includes a first surface, a second surface, and four side surfaces; the first surface is disposed opposite to the second surface; the four side surfaces are connected to the first surface and the second surface; one of the four side surfaces is defined as an incident side oriented towards a light source. The reflective layer is disposed on end faces of the light guide casing but not on the incident side. The light guide casing includes a transparent material. The first surface includes an indicator sign; the indicator sign includes a plurality of ridges. The plurality of ridges are arranged in parallel and protrude from the first surface. The plurality of ridges extend in a direction perpendicular to the incident side.

Dependencies are inferred from the claim text.