IMAGE SENSOR HAVING IMPROVED LIGHT UTILIZATION EFFICIENCY

摘要

At least one example embodiment discloses an image sensor with an improved light utilization efficiency based on reflective color filters. Since the image sensors may use most of an incident light for forming an image by using reflective color filters, light loss due to light absorption may be reduced. Therefore, light utilization efficiency of the image sensors may be improved while embodying color purity.

主权项

1. An image sensor comprising:
a color filter array including a plurality of color filters configured to transmit lights of different wavelengths, the plurality of color filters being adjacent to one another; a mirror layer including a plurality of mirrors facing the color filter array such that reflective surfaces of the plurality of mirrors face toward the color filter array; a plurality of transparent light path changing elements, disposed alternately with the mirrors in the mirror layer, the plurality of transparent light path changing elements configured to tilt a light traveling direction; and a plurality of micro lenses configured to concentrate an incident light onto the plurality of light path changing elements, respectively, wherein the plurality of color filters are configured to transmit lights of corresponding wavelength bands only and reflect lights of other wavelength bands.