US Patent No. 9,964,841
LIGHT SOURCE DEVICE, PROJECTION DISPLAY DEVICE, AND LIGHT SOURCE CONTROL METHOD
| Patent No. | 9,964,841 |
|---|---|
| Issue Date | May 08, 2018 |
| Title | Light Source Device, Projection Display Device, And Light Source Control Method |
| Inventorship | Kenji Suzuki, Tokyo (JP) |
| Assignee | NEC Display Solutions, Ltd., Tokyo (JP) |
Claim of US Patent No. 9,964,841
1. A light source device comprising:a phosphor rotating body on which a phosphor formed on a surface and that is used in a state of rotation having an axis of rotation that is perpendicular to said surface;
a first excitation light source that irradiates first excitation light upon a first position that is separated by a predetermined distance from the center of rotation on said surface to cause emission of a first fluorescent light;
a detection light generation unit that irradiates detection light upon a second position that differs from said first position and that is separated by said predetermined distance from said center of rotation on said surface;
an optical detection unit that supplies a detection signal that corresponds to emission light that is emitted from said phosphor rotating body in response to said detection light; and
a control unit that receives said detection signal and that controls the intensity of said first excitation light on the basis of the detection signal.
a first excitation light source that irradiates first excitation light upon a first position that is separated by a predetermined distance from the center of rotation on said surface to cause emission of a first fluorescent light;
a detection light generation unit that irradiates detection light upon a second position that differs from said first position and that is separated by said predetermined distance from said center of rotation on said surface;
an optical detection unit that supplies a detection signal that corresponds to emission light that is emitted from said phosphor rotating body in response to said detection light; and
a control unit that receives said detection signal and that controls the intensity of said first excitation light on the basis of the detection signal.