Optical modulation structure

An electronic device, having an optical modulation region and a non-optical modulation region and comprising:

• a first substrate;
• a first transparent electrode layer, disposed on the first substrate;
• and
• a second transparent electrode layer, disposed on the first transparent electrode layer and having an opening, wherein the optical modulation region overlaps the opening, the non-optical modulation region overlaps the first transparent electrode layer and the second transparent electrode layer, and a cell gap of the optical modulation region is greater than a cell gap of the non-optical modulation region,
• wherein the first substrate has a first thickness in the optical modulation region, the first substrate has a second thickness in the non-optical modulation region, and the first thickness is less than the second thickness.