Abstract: A light-emitting diode (LED) package includes an LED chip on a substrate, an adhesive phosphor film on the LED chip, a cell lens on the adhesive phosphor film, and a lateral reflective layer covering respective lateral surfaces of the LED chip, the adhesive phosphor film, and the cell lens, a lateral surface of the lateral reflective layer being coplanar with a lateral surface of the substrate.

Abstract: A light emitting diode (LED) package includes a substrate having a pair of first wiring electrodes and a pair of second wiring electrodes, an LED chip on the substrate, the LED chip being electrically connected to the pair of first wiring electrodes, a wavelength conversion film on the LED chip, an electrochromic film on the wavelength conversion film, the electrochromic film electrically connected to the pair of second wiring electrodes, and the electrochromic film being configured to have a first color before application of a voltage and to be transparent after application of the voltage, an optical lens on the electrochromic film, and a lateral structure having a reflective layer covering at least a portion of a lateral surface of each of the LED chip and the wavelength conversion film, and a color layer on the reflective layer and having a second color.

Abstract: An optical device for exit pupil expansion (EPE) for improving a field of view (FOV) and luminance uniformity, and a display apparatus including the same are provided. The optical device includes: an input part into which a virtual image is input; and an EPE part configured to receive the virtual image from the input part, perform one-dimensional (1D) EPE and two-dimensional (2D) EPE to combine the virtual image with an external real image, and output the combined image.

Abstract: Provided is a display device including a light guide plate; a reflective prism configured to reflect an imaging beam toward the light guide plate, wherein the imaging beam reflected by the reflective prism travels within the light guide plate at an angle greater than a critical angle of the light guide plate; and a diffraction grating configured to diffract the imaging beam traveling within the light guide plate to an angle less than or equal to the critical angle of the light guide plate, wherein the reflective prism includes a first surface in contact with the light guide plate, and a second surface configured to reflect the imaging beam.

Abstract: A display device includes a light guide plate; an input grating on a first surface of the light guide plate and configured to generate a diffracted transmission beam; an output grating on the first surface of the light guide plate and spaced apart from the input grating, wherein the output grating is configured to generate a first output beam emitted from the light guide plate; and an optical efficiency enhancement layer on a second surface of the light guide plate and overlapping at least one of the input grating and the output grating in a traveling direction of the input beam, the second surface being opposite to the first surface.

Abstract: A light emitting diode (LED) package includes a substrate having a pair of first wiring electrodes and a pair of second wiring electrodes, an LED chip on the substrate, the LED chip being electrically connected to the pair of first wiring electrodes, a wavelength conversion film on the LED chip, an electrochromic film on the wavelength conversion film, the electrochromic film electrically connected to the pair of second wiring electrodes, and the electrochromic film being configured to have a first color before application of a voltage and to be transparent after application of the voltage, an optical lens on the electrochromic film, and a lateral structure having a reflective layer covering at least a portion of a lateral surface of each of the LED chip and the wavelength conversion film, and a color layer on the reflective layer and having a second color.

Abstract: A light-emitting diode (LED) package includes an LED chip on a substrate, an adhesive phosphor film on the LED chip, a cell lens on the adhesive phosphor film, and a lateral reflective layer covering respective lateral surfaces of the LED chip, the adhesive phosphor film, and the cell lens, a lateral surface of the lateral reflective layer being coplanar with a lateral surface of the substrate.

Abstract: A light emitting diode (LED) module includes a substrate, an LED package, a light sensor and a lens. The LED package includes a light emitting region and is mounted on an upper surface of the substrate. The light sensor includes a light receiving region and is mounted on the upper surface of the substrate horizontally adjacent the LED package. The lens is vertically aligned over the light emitting region of the LED package and at least partially overlaps the light receiving region of the light sensor.

Abstract: A light emitting diode (LED) module includes a substrate, an LED package, a light sensor and a lens. The LED package includes a light emitting region and is mounted on an upper surface of the substrate. The light sensor includes a light receiving region and is mounted on the upper surface of the substrate horizontally adjacent the LED package. The lens is vertically aligned over the light emitting region of the LED package and at least partially overlaps the light receiving region of the light sensor.

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: 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: An optical device and a light source module including the same are provided. The optical device includes a first surface having an incident portion; a second surface emitting light incident through the incident portion outwardly; a support portion protruding from the first surface; and a blocking portion surrounding an outer portion of the support portion, the blocking portion being stepped with respect to the first surface.

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.

Abstract: There is provided a lens for a light emitter which includes: a bottom surface; an incident surface connected to the bottom surface at a central region of the bottom surface and disposed on or above a light source to allow light emitted from the light source to be made incident thereto and travel in an interior of the lens; and an output surface connected to the bottom surface at an edge of the bottom surface and configured to allow the light which has traveled in the interior of the lens to be emitted outwardly therefrom, wherein the central region of the bottom surface protrudes with respect to the other region of the bottom surface.

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.

Abstract: An optical device and a light source module including the same are provided. The optical device includes a first surface having an incident portion; a second surface emitting light incident through the incident portion outwardly; a support portion protruding from the first surface; and a blocking portion surrounding an outer portion of the support portion, the blocking portion being stepped with respect to the first surface.

Abstract: There is provided a light source module including a light emitting device, and an optical device including a first surface disposed above the light emitting device and having a hollow recessed in a light emitting direction in a central portion through which an optical axis passes, and a second surface disposed to be opposite to the first surface and configured to refract light incident through the hollow to be emitted to the outside. The optical device includes a plurality of ridges disposed on the second surface and periodically arranged in a direction from the optical axis to an edge connected to the first surface.

Abstract: An optical device includes a first surface facing alight source, and including a recess portion formed in a central portion of the first surface through which an optical axis of light passes and a concave-convex pattern disposed around the recess portion, and a second surface which is disposed to oppose the first surface and at which the light incident through the recess portion is refracted and emitted externally. The recess portion may be recessed in a direction in which the light is emitted. The concave-convex pattern includes a plurality of convex portions and a plurality of concave portions alternatively and repetitively arranged in a direction outwardly from the recess portion toward an edge at which the first surface is connected to the second surface.

Abstract: There is provided a lens for a light emitter which includes: a bottom surface; an incident surface connected to the bottom surface at a central region of the bottom surface and disposed on or above a light source to allow light emitted from the light source to be made incident thereto and travel in an interior of the lens; and an output surface connected to the bottom surface at an edge of the bottom surface and configured to allow the light which has traveled in the interior of the lens to be emitted outwardly therefrom, wherein the central region of the bottom surface protrudes with respect to the other region of the bottom surface.

Abstract: A light emitting module includes a light emitting unit including a plurality of light sources, a reflection unit disposed on the light emitting unit and configured to reflect light emitted from the light emitting unit, and a lens unit disposed on an optical path of the light reflected by the reflection unit. The reflection unit includes a plurality of reflection holes corresponding to the plurality of light sources and having inner walls which are provided as reflective surfaces. A depth of a reflection hole distant from an optical axis of the lens unit is greater than a depth of a reflection hole adjacent to the optical axis of the lens unit.