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

Claim 3:
4. 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;
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;
an optical liquid, configured to fill the first cavity, wherein the light-transmitting layer directly contacts the optical liquid, and part of the optical liquid is located between the light incident surface and the at least one diffusion surface;
a second substrates; and
an elasticity film, wherein the second substrate is located on the second surface of the first substrate and comprises at least one second cavity, the at least one second cavity communicates with the first cavity of the first substrate, the second substrate is located between the elasticity film and the first substrate, and the elasticity film covers the second substrate.