Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A method of driving a head mounted display is provided. The method derives a position adjustment data by displaying a binocular position adjustment image on a left-eye panel region and a right-eye panel region, derives a size adjustment data by displaying a binocular size adjustment image on the left-eye panel region and the right-eye panel region, generates a luminance adjustment data based on a difference between a left-eye and a right-eye luminance perception data, converts an image source into an input image data based on the position adjustment data, the size adjustment data, and the luminance adjustment data, and displays an image corresponding to the input image data.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A method of driving a head mounted display is provided. The method derives a position adjustment data by displaying a binocular position adjustment image on a left-eye panel region and a right-eye panel region, derives a size adjustment data by displaying a binocular size adjustment image on the left-eye panel region and the right-eye panel region, generates a luminance adjustment data based on a difference between a left-eye and a right-eye luminance perception data, converts an image source into an input image data based on the position adjustment data, the size adjustment data, and the luminance adjustment data, and displays an image corresponding to the input image data.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: An organic light emitting diode display includes a substrate, a thin film transistor on the substrate, a first electrode on and connected to the thin film transistor, a pixel defining layer on the first electrode and defining a pixel area, an organic light emitting layer on the first electrode and contacting the first electrode exposed in the pixel area, a second electrode on the organic light emitting layer, and a light blocking layer on the second electrode and exposing the second electrode at a position corresponding to the pixel area. The light blocking layer may include a first metal layer on the second electrode and exposing the second electrode at a position corresponding to the pixel area, a first intermediate layer covering the first metal layer, a second metal layer covering the first intermediate layer, and a second intermediate layer covering the second metal layer.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A head-mounted display apparatus includes a display unit including a substrate and display elements, and an optical element. The substrate includes a plurality of display portions and a plurality of light-transmitting portions, and the display elements are on the plurality of display portions of the substrate. The optical element is in an optical path of light that is emitted from the display unit and has through-holes that respectively correspond to the plurality of light-transmitting portions.

Abstract: An organic light emitting diode display includes a substrate, a thin film transistor on the substrate, a first electrode on and connected to the thin film transistor, a pixel defining layer on the first electrode and defining a pixel area, an organic light emitting layer on the first electrode and contacting the first electrode exposed in the pixel area, a second electrode on the organic light emitting layer, and a light blocking layer on the second electrode and exposing the second electrode at a position corresponding to the pixel area. The light blocking layer may include a first metal layer on the second electrode and exposing the second electrode at a position corresponding to the pixel area, a first intermediate layer covering the first metal layer, a second metal layer covering the first intermediate layer, and a second intermediate layer covering the second metal layer.

Abstract: A printed circuit board includes an insulation layer adjacent to a high-speed signal wire layer. A low-loss material layer is provided between the high-speed signal wire layer and the insulation layer. As a result, it is possible to reduce frequency loss of a high-speed signal wire layer and improve reliability of the printed circuit board.

Abstract: A head-mounted display apparatus includes a display unit including a substrate and display elements, and an optical element. The substrate includes a plurality of display portions and a plurality of light-transmitting portions, and the display elements are on the plurality of display portions of the substrate. The optical element is in an optical path of light that is emitted from the display unit and has through-holes that respectively correspond to the plurality of light-transmitting portions.

Abstract: An organic light emitting display apparatus includes a substrate divided into a first light emission region, and a transmission region adjacent to the first light emission and through which an external light is transmitted, an organic light emitting device on the substrate and in the first light emission region, and including a pixel electrode, an intermediate layer on the pixel electrode and including an organic light emission layer, and an opposite electrode on the intermediate layer; and a light scattering layer on the substrate and in the transmission region, and configured to scatter a light incident thereto from the intermediate layer in the first light emission region.

Abstract: A lens has a refractive index of n, and 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. A distance from a center of the base to a point of the curved center-edge surface is 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. The lens satisfies A1+A2<90+sin?1(1/n), where A1 an obtuse angle between a main axis and a tangent line of the curved centermost surface, and A2 is an acute angle between a straight line linking the center of the base to the point of the curved centermost surface and the main axis.

Abstract: An organic light emitting display apparatus includes a substrate divided into a first light emission region, and a transmission region adjacent to the first light emission and through which an external light is transmitted, an organic light emitting device on the substrate and in the first light emission region, and including a pixel electrode, an intermediate layer on the pixel electrode and including an organic light emission layer, and an opposite electrode on the intermediate layer; and a light scattering layer on the substrate and in the transmission region, and configured to scatter a light incident thereto from the intermediate layer in the first light emission region.

Abstract: A display device includes: a display panel configured to display an image; a sound element on a rear side of the display panel; and a rear chassis configured to receive the display panel and protect the rear side of the display panel, and including a protruding portion protruding away from the rear side of the display panel and corresponding to the sound element. The sound element includes a pair of electrodes, and a vibration material layer between the electrodes.

Abstract: A printed circuit board includes an insulation layer adjacent to a high-speed signal wire layer. A low-loss material layer is provided between the high-speed signal wire layer and the insulation layer. As a result, it is possible to reduce frequency loss of a high-speed signal wire layer and improve reliability of the printed circuit board.

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.