Patent ID: 11940719
Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A light source device for generating excitation light that is irradiated to a phosphor, comprising:
a plurality of light sources that emits laser light; and
a microlens array that comprises a plurality of microlenses arranged in two directions orthogonal to each other, wherein the laser light emitted from the light source is incident on the microlens array and exits the microlens array as output light, and that irradiates the phosphor with the output light as an excitation light, wherein:
the light source image of the light source on an irradiated surface of the microlens array is elliptical;
a long axis direction of the light source image intersects with both the two directions; and
in a coordinate system comprising: a first axis that is parallel to a principal ray of the laser light incident on the microlens array; a second axis, in a direction in which the laser light emitted from the microlens array or the fluorescence emitted from the phosphor is reflected, that is an orthogonal direction to the first axis; and a third axis that is orthogonal to the first axis and the second axis, respectively,
the two directions intersect with the direction of the second axis and the direction of the third axis, respectively,
wherein when a width of a short axis direction of the light source image is c, and a length of a microlens of the microlens array parallel to the short axis direction of the light source image is L,
L≤3.0c.