Abstract: Discussed is a backlight unit, including a base substrate; a partition wall on the base substrate and including a plurality of grooves; semiconductor light-emitting devices on the base substrate and in the plurality of grooves, respectively; a phosphor layer defined in each of the plurality of grooves to cover the semiconductor light-emitting devices and absorbs light in a specific wavelength band to emit light in a wavelength band different from the light in the specific wavelength band; a light diffusion layer that above the phosphor layer and diffuses light; and a spacer between the partition wall and the light diffusion layer, wherein the spacer includes: a body part attached to the partition wall; and a protruding part protruding in a direction toward the light diffusion layer and attached to the light diffusion layer, such that the light diffusion layer and the phosphor layer are spaced apart from each other.

Abstract: An image display apparatus and a method for operating same are disclosed. The method includes storing a first captured image that does not include a viewer image being an image of a viewer as a background image, calculating a position of the viewer based on a differential image between the background image and a second captured image including the viewer image, and changing multi-viewpoint images based on the position of the viewer and displaying the changed multi-viewpoint images.