Abstract:
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.
Abstract:
A light emitting device package is provided. The package includes a light emitting device including a substrate, and a light emitting structure having a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer stacked on the substrate; and a wavelength conversion film disposed in a path of light emitted by the light emitting device and having phosphor layers stacked on each other. A portion of the phosphor layers includes phosphor structures including a wavelength conversion material receiving light emitted from the light emitting device and converting a wavelength thereof and a binding resin binding the wavelength conversion material, and a transparent resin filling spaces between the phosphor structures.
Abstract:
A manufacturing method of a light emitting diode (LED) and a manufacturing method of an LED module are provided. The manufacturing method of the LED may include manufacturing a plurality of LED chips, manufacturing a phosphor pre-form including a plurality of mounting areas for mounting the plurality of LED chips, applying an adhesive inside the phosphor pre-form, mounting each of the plurality of LED chips in each of the plurality of mounting areas, and cutting the phosphor pre-form to which the plurality of LED chips are mounted, into units including individual LED chips.
Abstract:
A light source module includes a light source, a light guide plate on the light source and including at least one recess portion in an upper surface thereof, and a filter sheet on an upper surface of the light guide plate and having a pattern. The pattern may be configured to partially reflect and partially transmit light emitted from the light source through the light guide plate.