Privacy mode-switchable display system and operation method thereof

Abstract

A privacy mode-switchable display system can include an array of controllable lenses. Each controllable lens can receive, as received light, light emitted from a light-emitting diode (LED) of an array of LEDs. Each controllable lens can control an angular width of the received light to form width-controlled light that can propagate away from the lenses in an angular distribution having a controllable angular width. In some examples, each controllable lens can direct the respective received light through a curved interface between a first interface material, having a controllable refractive index, and a second interface material, having a fixed refractive index. In some examples, a controllable lens, positioned to receive light from a specified LED, may also receive off-axis light from an LED adjacent to the specified LED, to form spurious light. An optional cover layer can use total internal reflection to block the spurious light.

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