초록 ▼

A light guide having a non-light emitting portion made up of multiple layers of first and second substantially non-absorptive longitudinally specular light reflector materials. The index of refraction of each layer differs from the indices of refraction of the immediately adjacent layers, such that

A light guide having a non-light emitting portion made up of multiple layers of first and second substantially non-absorptive longitudinally specular light reflector materials. The index of refraction of each layer differs from the indices of refraction of the immediately adjacent layers, such that the layers collectively have high longitudinally specular reflectivity. The light guide also has a light emitting portion made of prism light guide wall material. A substantially non-absorptive light scattering mechanism is positioned within the non-light emitting portion in opposition to the light emitting portion.

대표청구항 ▼

1. A light guide, comprising in cross-section:(a) a non-light emitting portion comprising multiple layers of: (i) a first substantially non-absorptive longitudinally specular light reflector; (ii) a second substantially non-absorptive longitudinally specular light reflector; each one of said layers

1. A light guide, comprising in cross-section:(a) a non-light emitting portion comprising multiple layers of: (i) a first substantially non-absorptive longitudinally specular light reflector; (ii) a second substantially non-absorptive longitudinally specular light reflector; each one of said layers having a selected index of refraction which differs from the indices of refraction of layers immediately adjacent said one of said layers, such that said multiple layers collectively have high longitudinally specular reflectivity; (b) a light emitting portion comprising prism light guide wall material; and, (c) a substantially non-absorptive light scattering means positioned within said non-light emitting portion in opposition to said light emitting portion.