Lighting unit, a display and three-dimensional display

In the scanning system, it provides all the lighting unit, a display and three-dimensional display having high reliability, high luminance, and low power consumption in the circuit board. Bonded to the light guide plate (10) of the light modulation device (30) is provided on the light guide plate through (10) the light propagating the light modulation layer exhibits scattering or transparency (34). The light modulation layer (34) is disposed between the lower electrode (32) and an upper sheet electrodes (36) by a plurality of partial electrodes (. 32A) extending in a direction parallel to the light incident surface (10A) thereof. The drive circuit (50) sequentially driving said plurality of electrode portions (32A), to scan in the direction of the light incident surface (10A) perpendicular to the light modulation layer (34) exhibits a scattering region.