A naked-eye 3D display pixel unit and a display device having a 2D or 3D switching function. A naked-eye 3D display pixel unit (1) consists of a pixel unit (110), an optical light mixing region (120), and an optical guiding region (130). The pixel unit (110) comprises at least red, green, and blue light emitting units (110a, 110b, 110c). The light emitting units (110a, 110b, 110c) of the colors each consist of a substrate (111), a first electrode layer (112), a first doping layer (113), a second doping layer (114), and multiple second electrode layers (115, 115a, 115b). The pixel unit (110) projects light at a direct angle to form a 2D image, or alternately projects, by controlling electric fields, light along left-eye and right-eye directions according to a time sequence to form left-eye and right-eye parallax images, and then the images are merged to form a 3D image in a human brain. The naked-eye 3D display pixel unit (1) is minimized to a pixel level, and a large-area display device (20) consists of the naked-eye 3D display pixel unit (1) is not limited by the sizes of a panel and an optical lens, can be installed to have a flat or curved screen, and has the function of displaying 2D/3D images in a split-screen mode at the same time or in a full-screen mode by switching 2D/3D modes according to content.
NAKED-EYE 3D DISPLAY PIXEL UNIT AND DEVICE HAVING 2D OR 3D SWITCHING FUNCTION