Disclosed is a pixel unit structure and display device, which belongs to the technical field of displays, and alleviates the problem that in the prior arts, a LCS design will reduce the transparency of the liquid crystal display device. The pixel unit structure comprises three different colored sub-pixels, namely a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein at least one of the three sub-pixels is divided into a primary pixel region and a secondary pixel region, and the green sub-pixel has a one-piece structure.