Grating regulating device and 3D displaying device

A grating regulating device, wherein the grating regulating device is applied to a 3D displaying device, the 3D displaying device comprises a display panel, the display panel comprises a first polarizing unit, the grating regulating device is provided on one side of the display panel away from the first polarizing unit, and the grating regulating device comprises:

• a first substrate and a second substrate, wherein the first substrate and the second substrate face each other;
• a second polarizing unit provided on one side of the second substrate away from the first substrate;
• and
• a third polarizing unit provided on one side of the first substrate away from the second substrate;
• and
• an absorption axis of the first polarizing unit and an absorption axis of the second polarizing unit are perpendicular, and the absorption axis of the second polarizing unit and an absorption axis of the third polarizing unit are perpendicular;
• wherein the grating regulating device further comprises an electrode layer, and the electrode layer is provided on one side of the first substrate away from the third polarizing unit;
• and
• an included angle θ between the absorption axis of the third polarizing unit and an extension direction of the electrode layer satisfies 0°<θ<180°, and θ≠90°;
• wherein the absorption axis of the third polarizing unit is parallel to the first substrate, and the electrode layer comprises a plurality of electrode parts, and neighboring instances of the plurality of electrode parts are electrically connected;
• and
• each of the plurality of electrode parts comprises a first sub-electrode part and a second sub-electrode part, the first sub-electrode part and the second sub-electrode part are electrically connected, and an extension direction of the first sub-electrode part and an extension direction of the second sub-electrode part are different.