Color substrate including retroreflective layer and display device including the color substrate

A color substrate comprising:

• a substrate having first and second pixel regions spaced apart from each other, and a light shielding region between the first and second pixel regions;
• a first color conversion layer over the first pixel region and configured to convert incident light into first color light;
• a second color conversion layer over the second pixel region and configured to convert the incident light into second color light;
• and
• a retroreflective layer over the light shielding region to retroreflect light incident through the first color conversion layer and/or light incident through the second color conversion layer back into the first color conversion layer and/or the second color conversion layer,
• wherein the first color conversion layer is configured to convert the retroreflected light from the retroreflective layer into the first color light, and/or the second color conversion layer is configured to convert the retroreflected light from the retroreflective layer into the second color light.

A display device comprising:

• a display unit comprising first and second pixels;
• and
• a color substrate over the display unit and having first and second pixel regions respectively overlapping the first and second pixels, the color substrate comprising:
• a substrate comprising the first and second pixel regions, and a light shielding region between the first and second pixel regions;
• a first color conversion layer over the first pixel, the first color conversion layer being configured to convert incident light into first color light;
• a second color conversion layer over the second pixel, the second color conversion layer being configured to convert the incident light into second color light;
• a base material layer over the light shielding region;
• and
• beads in the base material layer to retroreflect light incident through the first color conversion layer and/or light incident through the second color conversion layer back into the first color conversion layer and/or the second color conversion layer,
• wherein the first color conversion layer is configured to convert the retroreflected light into the first color light, and/or the second color conversion layer is configured to convert the retroreflected light into the second color light.