초록 ▼

To achieve a backlighting device having excellent light utilization, there is provided an edge lighting-type backlight having a light guiding member, a high-refractive-index layer formed thereon and having a higher refractive index than the light guiding member, and a scattering layer formed on the

To achieve a backlighting device having excellent light utilization, there is provided an edge lighting-type backlight having a light guiding member, a high-refractive-index layer formed thereon and having a higher refractive index than the light guiding member, and a scattering layer formed on the high-refractive-index layer. Light from a light source disposed facing the edge of the light guiding member enters the high-refractive-index layer through the light guiding member, and effectively scatters scatterers to produce high brightness, and furthermore, to achieve a color display device that eliminates color mixing in a transparent display device for decorative or various display uses, a construction is provided in which on one surface of a light guiding plate there are formed a high-refractive-index layer having a higher refractive index than the light guiding plate, a light scattering layer, and a low-refractive-index layer having a lower refractive index than the light guiding plate, one on top of another in this order, and on-top of that structure another light guiding plate is provided, on top of which a high-refractive-index layer and a light scattering layer are likewise formed, while a color filter is disposed on one edge face of each light guiding plate and a light source is disposed near each color filter.

대표청구항 ▼

[ What is claimed is:] [1.] A backlighting device comprising:a light guiding plate having a light emergence surface, a bottom surface and a light receiving edge;light source means disposed facing said edge of said light guiding plate;a substantially transparent layer having a higher refractive index

[ What is claimed is:] [1.] A backlighting device comprising:a light guiding plate having a light emergence surface, a bottom surface and a light receiving edge;light source means disposed facing said edge of said light guiding plate;a substantially transparent layer having a higher refractive index than said light guiding plate disposed on top of and immediately adjacent said light emergence surface of said light guiding plate; anda scattering layer disposed on top of said substantially transparent layer wherein the bottom surface is free of an attached reflecting layer.