Privacy film, display apparatus, and method of displaying image in display apparatus

A privacy film, comprising:

• a first conductive layer;
• an emitting angle limiting spacer layer on the first conductive layer, wherein the emitting angle limiting spacer layer comprises a plurality of spacers defining a plurality of light emitting regions, a respective one of the plurality of light emitting regions is between two adjacent spacers of the plurality of spacers;
• a second conductive layer on a side of the emitting angle limiting spacer layer away from the first conductive layer, wherein the second conductive layer is spaced apart from the first conductive layer by a first distance;
• and
• a plurality of light diffuser particles in a space between the first conductive layer and the second conductive layer;
• wherein a maximum height of the plurality of spacers relative to a surface of the first conductive layer facing the second conductive layer is less than the first distance;
• the second conductive layer is spaced apart from a surface of a respective one of the plurality of spacers facing the second conductive layer by a second distance;
• and
• the first distance is greater than the second distance;
• wherein, in a first viewing mode, the plurality of light diffuser particles are present substantially throughout the space between the first conductive layer and the second conductive layer when a first voltage difference is provided between the first conductive layer and the second conductive layer;
• and
• light emitted out of the plurality of light emitting regions is limited in a first viewing angle range;
• wherein, in a second viewing mode, the plurality of light diffuser particles are enriched toward the first conductive layer as compared to in the first viewing mode, when a second voltage difference is provided between the first conductive layer and the second conductive layer;
• light emitted out of the plurality of light emitting regions is limited in a second viewing angle range;
• and
• the second viewing angle range is smaller than the first viewing angle range.