Samsung Electronics Co., Ltd.

Yae Kyung Son

Young Chol Lee

Seung Jae Lee

Jong Cheol Lee

Hyun Yong Choi

Yong-Hun Kwon

Jae Hak Cho

Cheoul Young Kim

Keun Bum Lee

A direct-type reflective diffusion lens and a lighting installation including the reflective diffusion lens. The reflective diffusion lens includes a first reflective surface concave and having a longitudinal cross-section with a parabola shape or normal distribution shape to totally reflect incident light, and a bottom surface comprising a light incident surface concave toward the first reflective surface. The reflective diffusion lens includes a second reflective surface having a longitudinal cross-section inclined by a first angle with respect to a central axis of the lens to totally reflect incident light and a refractive surface connecting the first reflective surface with the bottom surface. The refractive surface includes a first refractive surface having a longitudinal cross-section inclined by a second angle with respect to the central axis and a second refractive surface having a longitudinal cross-section inclined by a third angle with respect to the central axis.

Reflective diffusion lens and lighting installation including the reflective diffusion lens

This is provided a display apparatus. The display apparatus a light source configured to emit a light; and a reflective diffusion lens configured to emit a light emitted from the light source to an upper direction or a lower direction with respect to a direction perpendicular to an optical axis of the light source through an incident surface, a lateral surface, and a reflective diffusion surface.

Reflective diffusion lens, display apparatus having the same

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Uiwang-si, South Korea

Yae Kyung Son