Samsung Electronics Co., Ltd.

Jong Pil Won

Tetsuo Ariyoshi

Sang Woo Ha

Jun Ho Jung

Jong Sup Song

Won Soo Ji

Ji Hoon Yun

Kyung Mi Moon

Cheon Ho Park

Ariyoshi Tetsuo

An optical device is provided. The optical device includes a first surface that defines a concave light incident surface facing a central axis and a light source; a second surface disposed opposite the first surface which is configured to reflect light incident on the concave light incident surface; and an inclined light exit surface between the first surface and the second surface. The second surface includes a concave first reflective portion curving toward the first surface, and a substantially flat second reflective portion which portion is interposed between a first reflective portion edge of the first reflective portion and an outer second surface edge of the second surface. The first reflective portion is configured to totally reflect light incident at a predetermined angle or more with respect to a top surface of the light source once to the light exit surface.

Optical device and light source module including the same

An optical device and a light source module including the same are provided. The optical device includes a first surface including an incident portion through which light that is emitted from a light source is incident, and a second surface through which the light incident through the incident portion is emitted. The incident portion may include a curved surface that is recessed toward the second surface, and a pointed vertex to which the curved surface is recessed, the pointed vertex being in a central portion of the optical device, and the central portion being through which an optical axis of the optical device passes.

A light source module including a substrate, a plurality of light emitting devices installed on the substrate, and a plurality of lenses installed on the substrate to cover the plurality of light emitting devices, respectively, and each of the plurality of lenses having a pair of open end portions facing one another, the plurality of lenses arranged such that an open end portion of one lens faces an opened end portion of an adjacent lens is provided.

Light source module and lighting device having the same

A light source module includes a substrate, a plurality of light emitting devices disposed along a line on the substrate, and a lens. The lens extends in a long-axis direction in which the plurality of light emitting devices are aligned to cover the substrate and the plurality of light emitting devices, and has end sides opened at opposing ends of the lens in the long-axis direction. The lens has a first surface to which light from the plurality of light emitting devices is made incident, and a second surface allowing light made incident through the first surface to be radiated outwardly. The lens has a variable thickness, measured as a distance between the first surface and the second surface, in a cross-section of the lens along a plane orthogonal to the long-axis direction.

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Hwaseong-si, South Korea

Jong Pil Won