US 7,249,869 B2 · Light emitting device

Abstract

A light emitting device includes a mark body, a substrate arranged in back of the mark body, an LED mounted on an opposite surface of the substrate to the mark body, and a light guide arranged on a closer side of the substrate to the LED and having an upper surface serving as a light introducing surface for introducing LED-based light, a side surface serving as a light emitting surface and a backside subjected to a light diffuse reflection process to cause diffuse reflection by the backside. Incidentally, there can be provided a light emitting device that includes a light guide arranged on a closer side of the substrate to the LED and having an upper surface serving as a light introducing surface for introducing LED-based light, a side surface serving as a light emitting surface and a backside having a plurality of protrusions in a rib form.

Claims15

Dependent claims

A light emitting device comprising:

a mark body;
a substrate, a first surface of which the mark body is arranged;
a light emitting diode (LED) mounted on a second surface of the substrate;
and
a light guide arranged on the second surface of the substrate, including a first surface for introducing a light emitted from the LED, a second surface for emitting the light and a third surface opposing the first surface on which a light is reflected in a diffused manner,
wherein the third surface of the light guide comprises a plurality of protrusions in a rib form and the plurality of protrusions are formed such that the protrusions are arranged substantially at an equal interval in a direction along the outer edge of the light guide.

3 more elements

Dependencies are inferred from the claim text.

Light emitting device

Life of this patent

Light emitting device

Life of this patent

Abstract

Claims15