A display device comprising a display panel having pixels for generating light beams and an adjuster for adjusting the direction of the light beams, wherein the adjuster has an off-state and an on-state and comprises a stack of layers, wherein: - the stack comprises a first solid birefringent material layer having a first optic axis, a second solid birefringent material layer having a second optic axis, and a single layer of a switchable birefringent twisted nematic liquid crystal material or chiral nematic liquid crystal material provided between two electrodes; - a first interface between the first solid material layer and the switchable birefringent material; an alignment layer for orienting the switchable birefringent material parallel to the first optic axis at the first interface; a second interface between the second solid material layer and the switchable birefringent material; and an alignment layer for orienting the switchable birefringent material parallel to the second optic axis at the second interface; wherein the first interface and the second interface each define an array of lenticular lenses or prisms for adjusting the direction of the light beams, wherein - in the off-state, the switchable birefringent material at the first interface is configured to have an optic axis parallel to the first optic axis and the switchable birefringent material at the second interface is configured to have an optic axis parallel to the second optic axis; and - in the on-state, the switchable birefringent material at the first interface is configured to have an optic axis perpendicular to the first optic axis and the switchable birefringent material at the second interface is configured to have an optic axis perpendicular to the second optic axis, - and wherein in the on-state the display device has a multi view mode having at least two views and in the off-state the display device has a single view mode. - the stack comprises a first solid birefringent material layer having a first optic axis, a second solid birefringent material layer having a second optic axis, and a single layer of a switchable birefringent twisted nematic liquid crystal material or chiral nematic liquid crystal material provided between two electrodes; - a first interface between the first solid material layer and the switchable birefringent material; an alignment layer for orienting the switchable birefringent material parallel to the first optic axis at the first interface; a second interface between the second solid material layer and the switchable birefringent material; and an alignment layer for orienting the switchable birefringent material parallel to the second optic axis at the second interface; wherein the first interface and the second interface each define an array of lenticular lenses or prisms for adjusting the direction of the light beams, wherein - in the off-state, the switchable birefringent material at the first interface is configured to have an optic axis parallel to the first optic axis and the switchable birefringent material at the second interface is configured to have an optic axis parallel to the second optic axis; and - in the on-state, the switchable birefringent material at the first interface is configured to have an optic axis perpendicular to the first optic axis and the switchable birefringent material at the second interface is configured to have an optic axis perpendicular to the second optic axis, - and wherein in the on-state the display device has a multi view mode having at least two views and in the off-state the display device has a single view mode.