Abstract: In a lighting device, a first LED is formed by sealing a blue LED element by a first resin, the first resin having a first phosphor included in the first resin so as to raise a correlation color temperature of an emitted light color; and a second LED is formed by sealing a blue LED element by a second resin, the second resin having a second phosphor included in the second resin so as to lower a correlation color temperature of an emitted light color. The lighting device emits light from white light of a color having a first correlation color temperature to white light of a color having a second correlation color temperature, and the first correlation color temperature is higher than the second correlation color temperature. Consequently, various tones of white light can be more easily adjusted and controlled over a long period.

Abstract: An LED apparatus includes a base having thermal conductivity, an insulative substrate provided on one surface of the base and including electrodes provided on a surface of the substrate, at least one base-mounting area that is an exposed part of the base, exposed within a pass-through hole provided in the substrate, a plurality of LED elements mounted on the base in the base-mounting area and some of the LED elements in a unit electrically connected to the electrodes in series, a plurality of the units are electrically connected in parallel, and a frame disposed to surround the base-mounting area and configured to form a light-emitting area.

Abstract: An LED light source apparatus comprises a circular base having thermal conductivity, an insulative substrate concentric with the base and including a pass-through hole provided to pass through an upper surface and a lower surface of the substrate, at least one mounting area formed having a central portion of an upper surface of the base exposed from the pass-through hole of the substrate, and a plurality of LED elements mounted on the mounting area and electrically connected to electrodes provided on the upper surface of the substrate, the pass-through hole being formed in a circular shape concentric with the base and the substrate.

Abstract: A projector includes an optical element and a cooling device configured to supply cooling air along the surface of the optical element. The cooling device supplies the cooling air in two supply directions crossing each other and extending from one edge to the other edge of two opposed edges of the optical element.

Abstract: A projector includes: a plurality of light modulating devices; a light combining optical device having a plurality of light incidence planes that faced a corresponding one of the light modulating devices, the light combining optical device configured to combine the color lights modulated by the plurality of light modulating devices; and fixing members each having a plate-like base in which an opening is formed, the fixing members configured to fix the light modulating devices to the light combining optical device, the light modulating devices are fixed to the fixing members in a state in which the light modulating devices are inserted in the openings.

Abstract: A projector includes: a cooling device which supplies cooling air to a cooling target, wherein the cooling device includes a plurality of cooling fans each of which discharges cooling air, and a plurality of ducts each one end of which is connected with the corresponding one of the plural cooling fans to introduce the cooling air toward the cooling target in directions different from each other, and the plural ducts communicate with each other at the other end and have an outlet port through which the cooling air flows out.

Abstract: An LED light source apparatus comprises a circular base having thermal conductivity, an insulative substrate concentric with the base and including a pass-through hole provided to pass through an upper surface and a lower surface of the substrate, at least one mounting area formed having a central portion of an upper surface of the base exposed from the pass-through hole of the substrate, and a plurality of LED elements mounted on the mounting area and electrically connected to electrodes provided on the upper surface of the substrate, the pass-through hole being formed in a circular shape concentric with the base and the substrate.

Abstract: An LED apparatus includes a base having thermal conductivity, an insulative substrate provided on one surface of the base and including electrodes provided on a surface of the substrate, at least one base-mounting area that is an exposed part of the base, exposed within a pass-through hole provided in the substrate, a plurality of LED elements mounted on the base in the base-mounting area and some of the LED elements in a unit electrically connected to the electrodes in series, a plurality of the units are electrically connected in parallel, and a frame disposed to surround the base-mounting area and configured to form a light-emitting area.

Abstract: An illumination device includes a circuit board (11), an LED element (12) mounted on the circuit board, a light-transmitting sealing resin (16) covering the LED element and containing a fluorescent material, a light reflector (14) covering the light-transmitting sealing resin and reflecting light emitted from the LED element, and a light-guiding part (13) comprising a light-transmitting plate connected to the light-transmitting sealing resin, the light-guiding part guiding the light emitted from the LED element and including a light emission surface (13a) configured to emit the light.

Abstract: A semiconductor light-emitting device includes: a printed-wiring board; a light-emitting diode element mounted on the printed-wiring board; and a resin body for sealing the light-emitting diode element. The resin body is composed of a first resin body arranged around the light-emitting diode element, and a second resin body, which seals the light-emitting diode and the first resin body. An upper edge of the first resin body disposed at a lower position of the PN-junction is configured to be at least on or beyond an imaginary line that connects the PN-junction and a lower edge of the second resin body.

Abstract: In a lighting device, a first LED is formed by sealing a blue LED element by a first resin, the first resin having a first phosphor included in the first resin so as to raise a correlation color temperature of an emitted light color; and a second LED is formed by sealing a blue LED element by a second resin, the second resin having a second phosphor included in the second resin so as to lower a correlation color temperature of an emitted light color. The lighting device emits light from white light of a color having a first correlation color temperature to white light of a color having a second correlation color temperature, and the first correlation color temperature is higher than the second correlation color temperature. Consequently, various tones of white light can be more easily adjusted and controlled over a long period.

Abstract: A light-emitting diode includes a circuit board, a pair of electrodes provided on the circuit board, at least one light-emitting diode element electrically connected to the pair of electrodes, a central electrode for heat-dissipation, provided between the pair of electrodes on the circuit board, and a heat-dissipation plate disposed on the central electrode for heat-dissipation and including a reflection surface. The central electrode for heat-dissipation includes an upper central electrode disposed on the upper surface of the circuit board and a lower central electrode disposed on the lower surface of the circuit board and the upper central electrode thermally connected to the lower central electrode.

Abstract: An illumination device includes a circuit board (11), an LED element (12) mounted on the circuit board, a light-transmitting sealing resin (16) covering the LED element and containing a fluorescent material, a light reflector (14) covering the light-transmitting sealing resin and reflecting light emitted from the LED element, and a light-guiding part (13) comprising a light-transmitting plate connected to the light-transmitting sealing resin, the light-guiding part guiding the light emitted from the LED element and including a light emission surface (13a) configured to emit the light.

Abstract: An LED includes a printed circuit board, at least one LED element including a junction and mounted on the printed circuit board, a first sealing member disposed to cover side surfaces of the LED element, and a second sealing member disposed to cover side surfaces of the LED element. The first sealing member is configured to reflect and shield light emitted from the junction of the LED element, and the second sealing member is configured to transmit light emitted from the LED element.

Abstract: A semiconductor light-emitting device includes: a printed-wiring board 3; a light-emitting diode element 2 mounted on the printed-wiring board 3; and a resin body for sealing the light-emitting diode element 2. The resin body is composed of a first resin body 7 arranged around the light-emitting diode element 2, and a second resin body 8 which seals the light-emitting diode 2 and the first resin body 7. An upper edge of the first resin body 7 disposed at a lower position of the junction is configured to be at least on or beyond an imaginary line that connects the junction and a lower edge of the second resin body.