Abstract: A nanophosphor sheet is presented. The nanophosphor sheet may include a base layer, a plurality of core-shell phosphors dispersed in the base layer, and a coating layer surrounding at least one core-shell phosphor among the plurality of core-shell phosphors. Also presented is a backlight device that includes a light source emitting light, a light guide plate receiving the light, and a plurality of core-shell phosphors positioned to receive the light and convert the light to white light. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.

Abstract: A flexible secondary battery includes an electrode assembly, a first external cover that is located on a first surface of the electrode assembly, and a second external cover that is located on a second surface of the electrode assembly, the second external cover and the first external cover including a sealing portion where edges of the first external cover and the second external cover are attached to each other to seal the electrode assembly. At least one of the first external cover and the second external cover includes a stress-relief pattern in a center portion.

Abstract: A display device includes a display panel including a display area in which an image is displayed, and a light unit that includes: a light guide plate including a light receiving surface and a light emitting surface; a light source spaced apart from the light receiving surface while facing the light receiving surface and overlapping the display area; and a light diffusion member extending between the light receiving surface and the light source. The light diffusion member includes at least one of a first pattern formed on a surface of the light diffusion member facing the light emitting surface, and a second pattern formed on another surface of the light diffusion member, thereby implementing uniform brightness across the whole surface of the display panel.

Abstract: A flexible secondary battery and a method of manufacturing the flexible secondary battery are disclosed. In one aspect, the flexible secondary battery comprises an electrode assembly including a plurality of curved sections that are continuously formed in a first direction. Each of the sections includes upper and lower portions connected to each other. Each upper portion comprises a left upper portion and a right upper portion spaced apart from each other, wherein the left and upper portions of each section are continuously formed with the adjacent sections. The lower portion of each section is spaced apart from the lower portions of the adjacent sections.

Abstract: A backlight unit including an optical pattern sheet and a liquid crystal display are provided. The backlight unit includes a light guide plate, a light source portion arranged adjacent to a side surface of the light guide plate to emit light, a mold frame having an extension portion that covers an upper portion of the light source portion and a part of an upper portion of the light guide plate, and an optical pattern sheet arranged on a lower portion of the extension portion to shade or diffuse incident light, wherein the optical pattern sheet includes a base film and an optical pattern portion positioned on the base film.

Abstract: A wavelength converter and a liquid crystal display having the same, the wavelength converter including a first pattern that converts a wavelength of light into red light, and a second pattern that converts a wavelength of light into green light. The first pattern and the second pattern are alternately disposed, and an optical path length La of each of the first pattern and the second pattern is given by Equation (1): La=(?a/2)×m, wherein La is an optical length of an a-th pattern, ?a is a wavelength of light converted by the a-th pattern, a is one or two, and m is a natural number.

Abstract: A flexible secondary battery includes an electrode assembly and external material surrounding the electrode assembly having at least one bonding portion, wherein the external material is bonded to itself at the at least one bonding portion, and the at least one bonding portion extends in a lengthwise direction of the electrode assembly at an edge of the electrode assembly.

Abstract: A flexible secondary battery includes an electrode stack assembly including a first electrode layer, a second electrode layer, and a separator between the first and second electrode layers; wherein the electrode stack assembly has a first end portion and a second end portion located opposite to the first end portion; and a fixing member fixing the first electrode layer, the separator, and the second electrode layer together; wherein the electrode stack assembly includes a fixing member region in which the fixing member is formed, the fixing member region being located between the first and second end portions of the electrode stack assembly in a first direction, and wherein the first electrode layer, the separator, and the second electrode layer are flexible at both sides of the fixing member.

Abstract: An optical sheet includes a base film, a prism pattern formed in a first area of the base film, and a diffusion member formed in a second area of the base film. The prism pattern has a plurality of parallel prisms on a light-exiting surface. The diffusion member includes a plurality of scatter members in the base film to scatter light, or a plurality of irregularly arranged lenses on one or more of the light-incident surface and the light-exiting surface.

Abstract: A backlight unit includes a light source which generates light, a light guide plate which guides the light substantially in an upward direction, a first frame member which holds the light source and diffuses the light traveling substantially in the upward direction between the light source and the light guide plate, a second frame member which holds the light guide plate, a third frame member which holds the light guide plate, a reflective plate disposed under the light guide plate and which reflect the light leaked downwardly from the light guide plate substantially to the upward direction, and an optical sheet disposed on the light guide plate and the first to third frame members and which diffuses the light provided from the first frame member and the light guide plate and condenses the light substantially in the upward direction.

Abstract: Display apparatuses are provided. The display apparatus includes a light source package generating light, a circuit board including a recessed region in which the light source package is disposed, a display panel displaying images, and a light guide plate directing the light generated from the light source package onto the display panel. The light guide plate includes a top surface, a bottom surface, and a plurality of sidewall surfaces. One of the sidewall surfaces of the light guide plate is a light incident surface on which the light from the light source package is irradiated. A distance between the light source package and the light incident surface is less than a width of the circuit board.

Abstract: A display device includes a display panel including a display area in which an image is displayed, and a light unit that includes: a light guide plate including a light receiving surface and a light emitting surface; a light source spaced apart from the light receiving surface while facing the light receiving surface and overlapping the display area; and a light diffusion member extending between the light receiving surface and the light source. The light diffusion member includes at least one of a first pattern formed on a surface of the light diffusion member facing the light emitting surface, and a second pattern formed on another surface of the light diffusion member, thereby implementing uniform brightness across the whole surface of the display panel.

Abstract: An optical sheet includes a base film, a prism pattern formed in a first area of the base film, and a diffusion member formed in a second area of the base film. The prism pattern has a plurality of parallel prisms on a light-exiting surface. The diffusion member includes a plurality of scatter members in the base film to scatter light, or a plurality of irregularly arranged lenses on one or more of the light-incident surface and the light-exiting surface.

Abstract: A nanophosphor sheet is presented. The nanophosphor sheet may include a base layer, a plurality of core-shell phosphors dispersed in the base layer, and a coating layer surrounding at least one core-shell phosphor among the plurality of core-shell phosphors. Also presented is a backlight device that includes a light source emitting light, a light guide plate receiving the light, and a plurality of core-shell phosphors positioned to receive the light and convert the light to white light. The core-shell phosphors may be incorporated into the light guide plate or be positioned on the light guide plate as a separate layer.