LIGHT-CONTROL ELEMENT, DISPLAY DEVICE, AND ILLUMINATION DEVICE

摘要

This light-control element is provided with: a plurality of light-emitting elements that are configured in a manner so as to control the amount of light that is radiated; a light-guide body that has a plurality of light extraction regions that extract any of the plurality of light beams to the outside while the light is being propagated; a first prism structure that transmits light entering from at least one of the plurality of light-emitting elements and radiates the light to the light-guide body; and a low-refractive-index body that has a lower refractive index than the refractive index of the light-guide body and that suppresses the entrance of light propagating within the light-guide body to the first prism structure. The first prism structure has at least one tilted surface having at least one type of tilt angle; the pathway of at least a portion of the plurality of light radiated from the plurality of light-emitting elements passes through the tilted surface; at least two light extraction regions from among the plurality of light extraction regions have mutually different ranges of angle of incidence at which light propagating within the light-guide body can be extracted to the outside; and each of the plurality of light beams radiated from the plurality of light-emitting elements is propagated at a different angle of propagation within the light-guide body.