Patent ID: 11917339
Assignee: LARGAN PRECISION CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 21:
22. A light engine, comprising:
an image surface, comprising a first image area, a second image area, and a third image area;
a projected light surface, comprising a first light source, a second light source, and a third light source, wherein the first light source, the second light source, and the third light source provide light with different wavelengths;
a projection lens assembly;
a plurality of folding elements, comprising a first folding element, a second folding element, and a third folding element that are arranged along a light emitting axis; and
an image providing device, having a front surface and a rear surface, the image surface is located on the front surface of the image providing device, and the image providing device comprises a light reducing layer with an anti-reflection subwavelength structure;
wherein the image surface and the projected light surface are substantially in parallel with the light emitting axis, and there is an air gap located between the image surface and the projected light surface;
wherein the first light source corresponds to the first folding element and the first image area, the second light source corresponds to the second folding element and the second image area, and the third light source corresponds to the third folding element and the third image area; the light emitting axis and the projection lens assembly are disposed on a same optical path.