Abstract: A backlight assembly includes a light source unit a light guiding plate and an optical changing pattern. The light source unit includes a light source, a first lens portion enclosing the light source and a second lens portion positioned on the first lens portion. The second lens portion has a concave shape at an upper face. The light guiding plate includes an upper face and a lower face. The light guiding plate has a groove formed on the lower face to enclose at least a portion of the light source unit. The light guiding plate guides the light generated from the light source unit. The optical path changing pattern is formed on the upper face of the light guiding plate, and faces the light source unit. As a result, an optical distribution of the backlight assembly may be uniformized, and a size of the backlight assembly may be reduced.

Abstract: A backlight assembly that improves color uniformity is presented. The backlight assembly includes a plurality of point light sources, an optical member on the point light sources, and a reflecting plate that is positioned to receive light that is reflected by the optical member. The point light sources includes a red light emitting diode generating red light, a green light emitting diode generating green light, and a blue light emitting diode generating blue light. The optical member transmits white light formed by mixing at least some of the red, green and blue lights and reflects the untransmitted portion of the red, green and blue lights. The reflecting plate, which receives the reflected light from the optical member, includes a plurality of patterns that reflect the incident red, green and blue lights, essentially “recycling” the light that did not get transmitted in the first pass.

Abstract: A backlight unit is provided. The backlight unit includes a point light source circuit board and a point light source group row comprised of a plurality of point light source groups arranged in the point light source circuit board in a line. In addition, at least a part of the point light source groups have a different rotating angle with respect to each other.

Abstract: An LCD includes an LCD panel, a light guiding plate disposed at a rear of the LCD panel and having a light incident surface on which a curved surface pattern is formed, and a point light source facing the light incident surface and disposed closer to the LCD panel than to a center of thickness of the light incident surface. Accordingly, the LCD including the point light source has excellent light efficiency and brightness uniformity.

Abstract: In an optical package capable of guiding light, and an optical lens and a backlight assembly having the optical package, the optical package includes a plurality of light emitting parts and a lens plate. The lens plate defines a plurality of lens parts corresponding to the light emitting parts, respectively. The lens plate has a plurality of light guiding portions extended from the lens parts in a side direction of the optical package.

Abstract: An optical lens refracts and reflects a light to increase a luminance in a top direction of the optical lens and to decrease a luminance in a horizontal direction of the optical lens. The optical lens includes a central portion and a peripheral portion. The central portion has a convex shape. The peripheral portion has a concave shape. The peripheral portion surrounds the central portion. Therefore, a power consumption and a manufacturing cost are decreased.

Abstract: A backlight unit comprises a light source part, and a reflective partition for dividing the light source part into a plurality of areas and reflecting light from the light source part. The light source part comprises a light emitting diode and a circuit board on which the light emitting diode is disposed. The reflective partition has a greater height than the light emitting diode.

Abstract: An optical lens has a first curved surface. The first curved surface has a first variable curvature. The optical lens has a second curved surface. The second curved surface has a second variable curvature. The second variable curvature forms a protrusion on the second curved surface. A first end of the first curved surface is connected to a first end of the second curved surface at an outer edge of the lens.

Abstract: A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.

Abstract: A display device includes an optical module, a receiving container and a display panel. The optical module includes a substrate, point light sources and an optical lens. The point light sources are disposed on the substrate, each of which generates light using power applied thereto through the substrate. The optical lens includes a first lens part having a receiving part receiving each of the point light sources, a second lens part disposed at a peripheral portion of the first lens part and having a different shape from that of the first lens part, and a connecting part connecting the first and second lens parts. The light from each of the point light sources sequentially passes through the first lens part and the second lens part. The receiving container receives the optical module. The display panel displays an image using the light. Thus, optical luminance and optical luminance uniformity of an image display panel are improved.

Abstract: A cooling apparatus comprises a casing, a heat sink and a cooling fan. The casing comprises a first opening and a second opening to provide an air path. The heat sink is received in the casing. The heat sink includes a recession part. The cooling fan is disposed in the recession part.

Abstract: A light generating device including a circuit board, and a plurality of light source groups provided on the circuit board, each of the light source groups comprising three main light sources and at least one sub light source emitting light having a peak wavelength that is different from a peak wavelength of each of the main light sources.

Abstract: A lens for a light emitting diode is formed with a material having a refractive index of n, and the lens includes a base, a first curved circumferential surface extending from the base, a curved center-edge surface extending from the first curved circumferential surface, and a curved centermost surface extending from the curved center-edge surface. The base includes a groove for receiving a light emitting chip therein. In the lens, a distance from a center of the base to a point of the curved center-edge surface is always shorter than the radius of curvature for the point of the curved center-edge surface. The curved centermost surface has a concave shape with respect to the base.