Patent ID: 11899196
Assignee: CORETRONIC CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 12:
13. A light homogenizing element, having a light incident surface and at least one diffusion surface, and comprising:
a first substrate, having a first surface and a second surface opposite to each other, and comprising a first cavity, wherein the first cavity penetrates from the first surface to the second surface;
a carrier layer, located on the first surface of the first substrate and having a light passing region penetrating the carrier layer, wherein the carrier layer comprises a protruding structure, and the protruding structure encloses the light passing region;
a piezoelectric film, located on the carrier layer;
a driving electrode, located on the carrier layer and configured to drive the piezoelectric film, wherein the driving electrode applies a driving voltage to the piezoelectric film, such that the piezoelectric film is stretched and deformed, pulling the protruding structure to bend and deform;
a light-transmitting layer, overlapped and provided on the protruding structure, wherein a surface of the light-transmitting layer covering the light passing region is the light incident surface; and
a plurality of light diffusion microstructures, provided on the at least one diffusion surface, wherein projections of the plurality of light diffusion microstructures on the light-transmitting layer are located in the light passing region,
wherein the driving electrode is ring-shaped, and the driving electrode surrounds the light passing region.