Patent ID: 7845808
Filing Date: 2010-12-07
Classification: G02B

Abstract:
1. An illuminating device, comprising: a light guide member comprising an annular main body and at least one light incident portion extending from and optically coupled to the annular main body, the annular main body being tubular and comprising a light transmitting portion bounded by an inner circumference surface and an outer circumference surface of the annular main body, the annular main body having a light emitting surface on the outer circumference surface; at least one light source optically coupled to the at least one light incident portion; and a light guiding member arranged between the at least one light source and the at least one light incident portion; wherein the annular main body has a plurality of micro protrusions formed on the light emitting surface for reducing total internal reflection of the light, thereby enabling emission of the light from the light emitting surface; and wherein the light guiding member is configured for guiding the light emitted from the at least one light source to the at least one light incident portion.