Multi-view display device and method

A display device which is switchable between a single view mode and a multiple view mode, comprising:

• a display panel,
• wherein the display device has rows and columns of sub-pixels and a display output side,
• wherein the display panel is arranged to produce a display output;
• and
• a lenticular lens arrangement,
• wherein the lenticular lens arrangement is disposed over the display panel on the display output side,
• wherein the lenticular lens arrangement comprises an array of lenticular lens elements,
• wherein the lenticular lens elements comprise an electro-optic material,
• wherein the lenticular lens elements have a lenticular shape,
• wherein the lenticular lens elements are adjacent to a non-switchable optically transparent layer,
• wherein the non-switchable optically transparent layer has an inverse lenticular shape,
• wherein the electro-optic material comprises a first cholesteric liquid crystal component,
• wherein the first cholesteric liquid crystal component has an effective refractive index which is controllable by application of an electrical stimulus,
• wherein the first cholesteric liquid crystal component has a first ordinary refractive index and a first extra-ordinary refractive index,
• wherein the first ordinary refractive index differs from the first extra-ordinary refractive index by a first difference,
• wherein the first cholesteric liquid crystal component comprises a first helical structure,
• wherein the first helical structure is defined by a first pitch,
• wherein the first pitch is selected such that a first product of the first pitch and the first difference is equal to or less than a visible light wavelength of the display output.