The embodiment of the invention provides a display panel, device and method, an
electrowetting microcavity unit and a
light control substrate. The
electrowetting microcavity unit comprises an
electrowetting cavity and electrowetting liquid, wherein the electrowetting cavity is provided with a
peripheral surface, a
first light-transmitting bottom surface and a second light-transmitting bottom surface; the
first light-transmitting bottom surface and the second light-transmitting bottom surface are used for packaging the two ends of the
peripheral surface respectively; a partial space in the electrowetting cavity is filled with the electrowetting liquid; any two adjacent surfaces of the
peripheral surface, the
first light-transmitting bottom surface and the second light-transmitting bottom surface are insulated, at least two surfaces are provided with electrodes, and the
electrode of at least one surface is a grounding
electrode. According to the embodiment of the invention, light passesthrough the electrowetting liquid, and the angle of the incident surface and / or the emergent surface of the electrowetting liquid can be adjusted by controlling the
electric field, so that the light is projected to different directions, binocular
parallax is formed, and three-dimensional
image display is realized; and moreover, light is not shielded, and the light
utilization rate is high.