Naked eye 3D display pixel unit and display device having 2D/3D switching function

The invention discloses a naked eye 3D display pixel unit and a display device having a 2D/3D mode display function at different areas at the same time or a full screen switching function. The naked eye 3D display pixel unit is composed of a pixel unit, an optical mixing area and an optical guide region. The pixel unit comprises at least a red light emitting unit, a green light emitting unit and a blue light emitting unit, and each of the light emitting units is composed of a substrate, a first electrode layer, a first doped layer, a second doped layer, and a plurality of second electrode layers. The pixel unit can project a 2D image at a perpendicular incidence angle, or projects two-eye parallax images to the two directions of the left and right eyes in a staggered way according to a timing sequence by means of electric field control, and then a 3D image is formed by a human brain. The naked eye 3D display pixel unit minimizes the naked eye 3D display unit to a pixel level so that the large-area display dev