Abstract: An induction device includes a casing, a coil retainer, a coil that is disposed in the casing and retained to the coil retainer and a core that is disposed in the casing. The coil extends spirally around the core. The core and the coil retainer are fixed to the casing separately.

Abstract: An active clamp DC-DC converter includes a transformer having a primary coil and a secondary coil, a main switching device connected in series to the primary coil of the transformer so that the main switching device and the primary coil are connected in parallel to a DC power source, a reset capacitor, a reset switching device connected in series to the reset capacitor so that the reset switching device and the reset capacitor are connected in parallel to the primary coil of the transformer, a rectifying circuit connected to the secondary coil of the transformer, a smoothing circuit connected to the rectifying circuit, and a control circuit adjusting a dead time that elapses from the time when the reset switching device is turned off until the time when the main switching device is turned on, based on a voltage across the main switching device.

Abstract: An induction device includes a casing, a coil retainer, a coil that is disposed in the casing and retained to the coil retainer and a core that is disposed in the casing. The coil extends spirally around the core. The core and the coil retainer are fixed to the casing separately.

Abstract: An active clamp DC-DC converter includes a transformer having a primary coil and a secondary coil, a main switching device connected in series to the primary coil of the transformer so that the main switching device and the primary coil are connected in parallel to a DC power source, a reset capacitor, a reset switching device connected in series to the reset capacitor so that the reset switching device and the reset capacitor are connected in parallel to the primary coil of the transformer, a rectifying circuit connected to the secondary coil of the transformer, a smoothing circuit connected to the rectifying circuit, and a control circuit adjusting a dead time that elapses from the time when the reset switching device is turned off until the time when the main switching device is turned on, based on a voltage across the main switching device.

Abstract: A display unit for displaying first and second images includes a display device, a parallax barrier arranged facing the display device, and a lenticular lens arranged facing the parallax barrier. The parallax barrier includes a plurality of slit regions. A slit control section alternately switches each slit region between a transmitting state and a shielding state at a predetermined cycle. An image signal output section provides, in synchronization with the switching of the slit region, image data to the display device so that the plurality of pixels of the display device display an image different from the image displayed before switching of the slit region.

Abstract: A display unit includes an organic electroluminescence device having light-emitting regions, and a liquid crystal panel having pixels. The liquid crystal panel is spaced apart from the organic electroluminescence device so that the light of each light-emitting region illuminates at least two pixels. An image signal output section provides data of a first image to first pixels of the liquid crystal panel and provides data of a second image to second pixels of the liquid crystal panel. The image signal output section switches the display of the first image and the display of the second image in synchronization with a switching of the emitting of the light-emitting region and non-emitting of another light-emitting region of the organic electroluminescence device by the light-emission control section.

Abstract: An area lighting unit has an electroluminescent device, a light scattering portion on a side of a light exit surface of the electroluminescent device, and a light covering portion on a side of a light exit surface of the light scattering portion. The light converging portion includes first and second layered optical sheets, each having a planar light incidence portion through which light enters and a light exit portion through which the light exits. The light exit portion of each optical sheet forms parallel prismatic protrusions, each having a vertex angle of 90 degrees to 105 degrees. The optical sheets each are so arranged that the light incidence portion is oriented to the electroluminescent device and a direction in which the protrusions of the first optical sheet are arranged is perpendicular to a direction in which the protrusions of the second optical sheet are arranged.

Abstract: A display device that can be made to be smaller and thinner. The display device includes a light source including a plurality of emitting regions disposed in a plane, a light emission controller which performs switching control of each emitting region between an illuminating state and a blacked out state, a transmission type image display panel including a plurality of pixels through which light emitted from the light source is transmitted, an image signal output which sends each pixel a set of associated image data, and a light directing member which includes a structure for directing light that has passed through the pixels and which is disposed opposingly to the transmission type image display panel. A set of the emitting regions are arranged in the horizontal direction of the transmission type image display panel to oppose to an associated pixel of the transmission type image display panel.

Abstract: A display unit for displaying first and second images includes a display device, a parallax barrier arranged facing the display device, and a lenticular lens arranged facing the parallax barrier. The parallax barrier includes a plurality of slit regions. A slit control section alternately switches each slit region between a transmitting state and a shielding state at a predetermined cycle. An image signal output section provides, in synchronization with the switching of the slit region, image data to the display device so that the plurality of pixels of the display device display an image different from the image displayed before switching of the slit region.

Abstract: A display unit includes an organic electroluminescence device having light-emitting regions, and a liquid crystal panel having pixels. The liquid crystal panel is spaced apart from the organic electroluminescence device so that the light of each light-emitting region illuminates at least two pixels. An image signal output section provides data of a first image to first pixels of the liquid crystal panel and provides data of a second image to second pixels of the liquid crystal panel. The image signal output section switches the display of the first image and the display of the second image in synchronization with a switching of the emitting of the light-emitting region and non-emitting of another light-emitting region of the organic electroluminescence device by the light-emission control section.