Patent ID: 6011602
Filing Date: 2000-01-04
Classification: G02B

Abstract:
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.