Three-dimensional display device and driving method thereof

A driving method of a three-dimensional display device, wherein the three-dimensional display device comprises a liquid crystal display panel;

• and
• an electroluminescent display panel arranged under the liquid crystal display panel,
• wherein the electroluminescent display panel comprises a plurality of first areas and a plurality of second areas, the plurality of first areas and the plurality of second areas are arranged in array and arranged alternately in row direction and column direction, under a three-dimensional display mode, the plurality of first areas are light emitting areas, the plurality of second areas are black areas, and the light emitting areas comprise repeatedly arranged R light emitting areas, G light emitting areas, B light emitting areas and X light emitting areas, and
• wherein the liquid crystal display panel comprises the plurality of first sub-pixels arranged in array, at least every two first sub-pixels adjacent in row direction correspond to a first area, under the three-dimensional display mode, first sub-pixels corresponding to a same first area are used for providing gray scale information of different viewpoint images, and gray scales displayed by the first sub-pixels corresponding to the same first area are different from each other, wherein a central position of each first area overlaps with a central position of one of at least two corresponding first sub-pixels;
• the method comprising:
• under a three-dimensional display mode, controlling a plurality of first areas in the electroluminescent display panel to perform light emitting display, and controlling the plurality of first sub-pixels of a liquid crystal display panel, so as to enable first sub-pixels corresponding to a same first area to provide gray scale information of different viewpoint images and enable first sub-pixels corresponding to a same first area to display different gray scale information.