US Patent No. 10,084,999
ILLUMINATING DEVICE, WHEEL DETERIORATION DETECTING METHOD AND PROJECTOR
| Patent No. | 10,084,999 |
|---|---|
| Issue Date | September 25, 2018 |
| Title | Illuminating Device, Wheel Deterioration Detecting Method And Projector |
| Inventorship | Tomohiro Usami, Tokyo (JP) |
| Assignee | NEC DISPLAY SOLUTIONS, LTD., Tokyo (JP) |
Claim of US Patent No. 10,084,999
1. 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, at a side of the first surface, effective light as illuminating light by the excitation light;
a photo detector that is arranged on a side of a second surface 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 a degeneration has occurred in the illuminating light generating member, based on the light detected by the photo detector.
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, at a side of the first surface, effective light as illuminating light by the excitation light;
a photo detector that is arranged on a side of a second surface 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 a degeneration has occurred in the illuminating light generating member, based on the light detected by the photo detector.