Spatial light modulator and display device

A spatial light modulator, comprising:

• an array substrate and an upper substrate, which are arranged opposite to each other, and a liquid crystal layer and a photo spacer, which are located between the array substrate and the upper substrate;
• wherein a plurality of pixel electrodes arranged in a matrix, a planarization layer covering the pixel electrodes, and reflecting electrodes located on the planarization layer and corresponding to each of the pixel electrodes are arranged on the array substrate, and each of the reflecting electrodes is electrically connected with its corresponding pixel electrode through a first through-hole running through the planarization layer;
• and
• 2*2 adjacent pixel electrodes are a pixel group, the first through-hole corresponding to each of the pixel electrodes is located proximate to a center of the pixel group, and the photo spacer is located at the center of the pixel group.