Display device and control method thereof

A display device, comprising:

• a display assembly comprising a plurality of rows of pixel units;
• a phase retarder on a light exit side of the display assembly, the phase retarder being configured to modulate polarized light from adjacent rows of pixel units of the display assembly so that it has different directions of rotation of polarization orientation;
• a polarizer between the display assembly and the phase retarder;
• and
• a visible range adjuster between the display assembly and the polarizer, the visible range adjuster having a first electrode layer, a second electrode layer and a liquid crystal layer, the liquid crystal layer being divided into at least one first region and at least one second region, an orthographic projection of the first region on the display assembly overlapping a portion between the adjacent rows of pixel units,
• wherein the visible range adjuster is configured to apply a voltage to the first region of the liquid crystal layer through the first electrode layer and the second electrode layer in response to a first signal, to provide a first visible range for the display device, the first visible range being greater than a second visible range of the display device with the first electrode layer and the second electrode layer electrically de-energized, and
• wherein the first region is configured such that a polarization orientation of an exit light of the display assembly transmitted through the first region is a first polarization orientation after the voltage is applied to the first region,
• the second region is configured such that a polarization orientation of an exit light of the display assembly transmitted through the second region is a second polarization orientation, and
• the polarizer is configured to transmit the polarized light having the second polarization orientation through the polarizer and to block the polarized light having the first polarization orientation.