Abstract: A strobe lighting unit including a detecting circuit can reliably detect degradations of a xenon light source, which can flash as a light source for devices having a shooting with camera such as a smart phone, etc. The strobe lighting unit can include at least one xenon discharge tube as the xenon light source and at least one lighting circuit to flash the xenon discharge tube. The strobe lighting unit can also include at least one light-detecting circuit to detect degradations of the xenon discharge tube without a photo detector by monitoring an anode electrode of the xenon discharge tube at a flash thereof, and can be configured to output the monitoring result into the devices. Thus, the strobe lighting unit can result in an increase in the possible range of the devices, and can be employed for various devices including a thin mobile phone, a thin smart phone, etc.

Abstract: A strobe lighting unit including a detecting circuit can reliably detect degradations of a xenon light source, which can flash as a light source for devices having a shooting with camera such as a smart phone, etc. The strobe lighting unit can include at least one xenon discharge tube as the xenon light source and at least one lighting circuit to flash the xenon discharge tube. The strobe lighting unit can also include at least one light-detecting circuit to detect degradations of the xenon discharge tube without a photo detector by monitoring an anode electrode of the xenon discharge tube at a flash thereof, and can be configured to output the monitoring result into the devices. Thus, the strobe lighting unit can result in an increase in the possible range of the devices, and can be employed for various devices including a thin mobile phone, a thin smart phone, etc.

Abstract: There is provided a light-emitting element which includes a first semiconductor layer, a second semiconductor layer having an electrical conductivity that is different from that of the first semiconductor layer and an active layer disposed between the first and second layers, and a first and second electrodes respectively disposed on surfaces of the first and second semiconductor layers. The first electrode comprises a plurality of electrode pieces separated from each other; and each of the electrode pieces comprises a power feed pad, and an extended portion connected to the pad and that extends in a direction away from the pad, and a terminal end portion of the extended portion of an electrode piece is opposed to a terminal end portion of the extended portion of the other electrode piece across a gap.

Abstract: There is provided a light-emitting element which includes a first semiconductor layer, a second semiconductor layer having an electrical conductivity that is different from that of the first semiconductor layer and an active layer disposed between the first and second layers, and a first and second electrodes respectively disposed on surfaces of the first and second semiconductor layers. The first electrode comprises a plurality of electrode pieces separated from each other; and each of the electrode pieces comprises a power feed pad, and an extended portion connected to the pad and that extends in a direction away from the pad, and a terminal end portion of the extended portion of an electrode piece is opposed to a terminal end portion of the extended portion of the other electrode piece across a gap.

Abstract: An electronic flash apparatus includes a flash device, a light emitting device which is different from the flash device, and a concave reflector configured to reflect light beams from the flash device and the light emitting device. The concave reflector includes a flash-device reflecting surface configured to reflect the light beams from the flash device and a light-emitting-device reflecting surface configured to reflect the light beams from the light emitting device. The flash device is disposed inside the concave reflector, and the light emitting device is disposed outside the concave reflector. The light-emitting-device reflecting surface is disposed at a position where a light path of the light beams from the flash device does not exist. The apparatus further includes a light guiding member configured to guide the light beams from the light emitting device to the light-emitting-device reflecting surface positioned inside the concave reflector.

Abstract: An electronic flash apparatus includes a flash device, a light emitting device which is different from the flash device, and a concave reflector configured to reflect light beams from the flash device and the light emitting device. The concave reflector includes a flash-device reflecting surface configured to reflect the light beams from the flash device and a light-emitting-device reflecting surface configured to reflect the light beams from the light emitting device. The flash device is disposed inside the concave reflector, and the light emitting device is disposed outside the concave reflector. The light-emitting-device reflecting surface is disposed at a position where a light path of the light beams from the flash device does not exist. The apparatus further includes a light guiding member configured to guide the light beams from the light emitting device to the light-emitting-device reflecting surface positioned inside the concave reflector.