Illuminating device, wheel deterioration detecting method and projector
AssigneeNEC Display Solutions, Ltd.
InventorTomohiro USAMI
Life of this patent
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Abstract
An illuminating device includes: a light source emitting excitation light; a wheel including a wheel substrate transmitting the excitation light and an illuminating light generating member provided on the first surface of the wheel substrate to generate illuminating light by the excitation light; a photo detector, arranged on the second surface side that is opposite to the first surface of the wheel substrate, detects light that passed through the wheel; and a control unit that determines whether a defect or degeneration has occurred in the illuminating light generating member, based on the light detected by the photo detector.
Claims17
An illuminating device comprising:
- a light source that emits excitation light;
- a wheel that includes a wheel substrate through which the excitation light is transmitted and an illuminating light generating member that is provided on a first surface of the wheel substrate to generate illuminating light by the excitation light;
- a photo detector that is arranged on a second surface side that is opposite to the first surface of the wheel substrate to detect light that passed through the wheel;
- and
- a control unit that determines whether a defect or degeneration has occurred in the illuminating light generating member, based on the light detected by the photo detector.
A wheel deterioration detecting method of detecting deterioration of a wheel that includes:
- a wheel substrate that transmits excitation light;
- and an illuminating light generating member which is provided on a first surface of the wheel substrate to generate illuminating light by the excitation light, the method comprising:
- using a photo detector which is arranged on a second surface side that is opposite to the first surface of the wheel substrate to detect light that passed through the wheel;
- and,
- determining whether a defect or degeneration has occurred in the illuminating light generating member, based on the light that is detected by the photo detector.
Dependencies are inferred from the claim text.