3d display device and a driving method thereof

A 3D display device, comprising:

• a liquid crystal display panel for monochrome display, and an electroluminescence display panel for color display disposed under the liquid crystal display panel;
• wherein,
• the electroluminescence display panel comprises a plurality of regions arranged in a matrix, the plurality of regions form columns of bright regions and columns of dark regions, which are arranged alternately;
• in a 3D display portrait mode, each column of bright regions comprises bright regions with a same emitting color, and adjacent columns of bright regions have different emitting colors;
• in a 3D display landscape mode, each column of bright regions comprises bright regions, which are adjacent in a column direction, with different emitting colors, and the emitting colors of the bright regions, which are provided in a same row, of each column of bright regions are the same;
• and
• the liquid crystal display panel comprises a plurality of first sub-pixels arranged in a matrix;
• each bright region of the electroluminescence display panel corresponds to at least two first sub-pixels adjacent in a row direction of the liquid crystal display panel;
• in the 3D display mode, in each of the first sub-pixels corresponding to a same bright region, grey scales displayed by the first sub-pixels, which are configured to provide grey scale information of images of different viewpoints, are different from each other.