Image sensor

An image sensor comprising:

• a substrate including a plurality of photoelectric conversion elements;
• a variable filter layer disposed on the substrate;
• a plurality of conducting patterns providing a path for outputting an electrical signal generated by the plurality of photoelectric conversion elements;
• and
• an interlayer insulating layer covering the plurality of conductive patterns,
• wherein the variable filter layer comprises:
• a plurality of first electrodes extending in a first direction, and spaced apart from each other in a second direction;
• a first electro-optical material layer disposed on the plurality of first electrodes;
• a light-transmitting electrode disposed on the first electro-optical material layer;
• a second electro-optical material layer disposed on the light-transmitting electrode;
• and
• a plurality of second electrodes disposed on the second electro-optical material layer, extending in the second direction, and spaced apart from each other in the first direction.

An image sensor comprising:

• a substrate including a plurality of photoelectric conversion elements;
• a variable filter layer disposed on the substrate;
• a plurality of conducting patterns providing a path for outputting an electrical signal generated by the plurality of photoelectric conversion elements;
• an interlayer insulating layer covering the plurality of conductive patterns;
• and
• a plurality of microlenses focusing external light onto the plurality of photoelectric conversion elements,
• wherein the variable filter layer comprises:
• a plurality of first electrodes extending in a first direction;
• a first electro-optical material layer disposed on the plurality of first electrodes;
• a light-transmitting electrode disposed on the first electro-optical material layer and configured to receive a reference potential;
• a second electro-optical material layer disposed on the light-transmitting electrode;
• and
• a plurality of second electrodes disposed on the second electro-optical material layer and extending in a second direction,
• wherein one of a first voltage greater than the reference potential and a second voltage less than the first voltage and greater than the reference potential is applied to each of the plurality of first electrodes, and
• one of the first voltage and the second voltage is applied to each of the plurality of second electrodes.