Display panel

A display panel, comprising:

• a first substrate;
• a second substrate disposed opposite to the first substrate,
• wherein the second substrate comprises a substrate layer, a metal layer, a first protective layer, a nanoparticle layer, and a second protective layer arranged in a stack, and the second protective layer is disposed on a side of the second substrate facing the first substrate;
• a plurality of barrier walls disposed between the first substrate and the second substrate,
• wherein a plurality of receiving spaces are defined by the barrier walls, the first substrate, and the second substrate;
• an electrophoretic material contained in each of the receiving spaces;
• wherein the nanoparticle layer comprises metal nanoparticles distributed in an array;
• wherein the metal nanoparticles are configured to generate a structural color by plasma resonance with a metal in the metal layer, so that the second substrate reflects visible light;
• and
• wherein each of the receiving spaces comprises a plurality of first accommodation spaces, a plurality of second accommodation spaces, or a plurality of third accommodation spaces, a gap positioned between adjacent metal nanoparticles in each of the first accommodation spaces is a first pitch, a gap positioned between adjacent metal nanoparticles in each of the second accommodation spaces is a second pitch, and a gap positioned between adjacent metal nanoparticles in each of the third accommodation spaces is a third pitch, the first pitch is different from the second pitch, the first pitch is different from the third pitch, and the second pitch is different from the third pitch.