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

Claim 1:
2. A light source device for generating incident light of a microlens array that comprises a plurality of microlenses arranged in two directions orthogonal to each other and that irradiates an image forming device, that performs optical modulation, with the output light, the light source device comprising:
a plurality of light sources that emits laser 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 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 are parallel to the direction of the second axis or 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.