US Patent 11231643 Directional lens having lens array

A light emitting device is provided with a first light emitter and a second light emitter. The first light emitter is provided with a first lens for making the light of the first light source wide-angle, and the second light emitter is provided with a second lens for making the light of the second light source wide-angle. A plurality of first small lenses are arranged on a first incident plane of the first lens. The first small lens has a shape in which a maximum value of an angle formed between the first incident plane and a tangent of the first small lens is larger than an angle formed between the first incident plane and first light. The second lens has substantially the same configuration.