Illumination lighting apparatus, illumination device, and illumination fixture
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTeruhito Takeda, Hirofumi Konishi, Shinji Makimura
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Abstract
An illumination lighting apparatus is configured to light a plurality of light-emitting elements connected in series to each other. The illumination lighting apparatus includes one photosensor and a detector. The one photosensor is configured to detect light emitted from the plurality of light-emitting elements. The detector is configured to perform detection of a light emission defect on the plurality of light-emitting elements based on the light detected by the one photosensor. Moreover, the detector performs the detection process at an initial stage of lighting of the plurality of light-emitting elements.
Claims17
An illumination lighting apparatus configured to light a plurality of light-emitting elements connected in series to each other, the illumination lighting apparatus comprising:
- one photosensor configured to detect light emitted from the plurality of light-emitting elements;
- and
- a detector configured to perform a detection process of detecting a light emission defect in the plurality of light-emitting elements based on the light detected by the one photosensor,
- the detector being configured to perform the detection process at an initial stage of lighting of the plurality of light-emitting elements,
- the one photosensor being configured to detect light which is included in the light emitted from the plurality of light-emitting elements and which is reflected off an optical component configured to guide the light emitted from the plurality of light-emitting elements,
- the plurality of light-emitting elements are divided into two or more groups each including at least one light-emitting element,
- the detector includes
- two or more switches connected in parallel to the plurality of light-emitting elements, the two or more switches corresponding to the two or more groups on a one-to-one basis, each of the two or more switches being connected in parallel to a corresponding one of the two or more groups, and
- a processor configured to turn on the two or more switches sequentially one by one during the detection process to detect the light emission defect from the plurality of light-emitting elements, and
- each of the two or more switches includes
- a light-emitting diode connected to the processor, and
- a phototransistor connected in parallel to the corresponding one.
An illumination lighting apparatus configured to light a plurality of light-emitting elements connected in series to each other, the illumination lighting apparatus comprising:
- one photosensor configured to detect light emitted from the plurality of light-emitting elements;
- a detector configured to perform a detection process of detecting a light emission defect in the plurality of light-emitting elements based on the light detected by the one photosensor;
- and
- a lighting section having a dimming function of turning on and dimming the plurality of light-emitting elements, wherein
- the detector being configured to perform the detection process at an initial stage of lighting of the plurality of light-emitting elements, and
- the detector is configured to stop the detection process while the lighting section performs dimming control on the plurality of light-emitting elements.
An illumination lighting apparatus configured to light a plurality of light-emitting elements connected in series to each other, the illumination lighting apparatus comprising:
- one photosensor configured to detect light emitted from the plurality of light-emitting elements;
- a detector configured to perform a detection process of detecting a light emission defect in the plurality of light-emitting elements based on the light detected by the one photosensor;
- and
- a lighting section having a dimming function of turning on and dimming the plurality of light-emitting elements, wherein
- the detector being configured to perform the detection process at an initial stage of lighting of the plurality of light-emitting elements, and
- the lighting section is configured to forgo dimming control on the plurality of light-emitting elements while the detector performs the detection process.
An illumination lighting apparatus configured to light a plurality of light-emitting elements connected in series to each other, the illumination lighting apparatus comprising:
- one photosensor configured to detect light emitted from the plurality of light-emitting elements;
- and
- a detector configured to perform a detection process of detecting a light emission defect in the plurality of light-emitting elements based on the light detected by the one photosensor,
- the detector being configured to perform the detection process at an initial stage of lighting of the plurality of light-emitting elements,
- the plurality of light-emitting elements are divided into two or more groups each including at least one light-emitting element,
- the detector includes
- two or more switches connected in parallel to the plurality of light-emitting elements, the two or more switches corresponding to the two or more groups on a one-to-one basis, each of the two or more switches being connected in parallel to a corresponding one of the two or more groups, and
- a processor configured to turn on the two or more switches sequentially one by one during the detection process to detect the light emission defect from the plurality of light-emitting elements, and
- the processor is configured to perform, on each of the plurality of light-emitting elements, detection of an oscillation defect as the light emission defect in the at least one light-emitting elements included in each of the two or more groups, and in the oscillation defect, the light-emitting element emitting no light although a current flows through the light-emitting element.
Dependencies are inferred from the claim text.