초록 ▼

A reflection layer is provided on a surface of a light guiding body on which projections are formed with intervals, except the side surfaces of the projections. A light emitting element is provided close to one end surface of a light guiding element. Most of the light from the light emitting element

A reflection layer is provided on a surface of a light guiding body on which projections are formed with intervals, except the side surfaces of the projections. A light emitting element is provided close to one end surface of a light guiding element. Most of the light from the light emitting element is input to the light guiding body through the light input surface. The light travels through the light guiding body to be output from the side surfaces of the projections. After passing through a directional change element, the light is input to the light receiving element in a direction substantially perpendicular to a light receiving element. Outside light passes through the light receiving element and is then input to a lighting apparatus. In the lighting apparatus, the outside light passes through the directional change element to be reflected by a reflection layer on the light-output-side surface of the light guiding body and then again passes perpendicularly through the directional change element toward the light receiving element. When the light passes through the light receiving element, a displayed image can be viewed. The reflection layer can reflect the light with a small loss. In addition, if the outside light is input at an angle of other than 90.degree. to the light receiving element at first, the light can be reflected by the reflection layer with a small loss.

대표청구항 ▼

[ We claim:] [1.] A lighting apparatus comprising:light guiding means provided at the back of a light receiving element; andat least one light emitting means provided at the side of said light guiding means;wherein said light guiding means comprises:wherein the light from said light emitting means i

[ We claim:] [1.] A lighting apparatus comprising:light guiding means provided at the back of a light receiving element; andat least one light emitting means provided at the side of said light guiding means;wherein said light guiding means comprises:wherein the light from said light emitting means is transmitted to the back surface of said light receiving element for lighting said light receiving element;a light guiding body having at least one light input surface facing said light emitting means, a light-output-side surface facing said light receiving element, and a flat surface which is opposite to said light-output-side surface; anda plurality of projections extending from said light-output-side surface of said light guiding body, each of said projections having a top surface which is substantially parallel to said light-output-side surface, a vertical section of each of said projections being substantially a trapezoid, and side surfaces of said projections being inclined at an angle of 10 degrees or less from a plane which is perpendicular to said light-output-side surface.