Directional color conversion using photonic crystals with quantum dots

A method, comprising:

• receiving light of a first color by a color converting device that includes an array of color conversion regions, the array of color conversion regions including color conversion regions of a first type and color conversion regions of a second type that is distinct from the color conversion regions of the first type, a respective color conversion region of the array of color conversion regions including a respective photonic crystal structure defining a respective two-dimensional pattern, the respective color conversion region including a respective color conversion matrix,
• whereby:
• the light of the first color transmitted to the color conversion regions of the first type is converted to light of a second color that is distinct from the first color;
• the light of the first color transmitted to the color conversion regions of the second type is converted to light of a third color that is distinct from the first color and the second color;
• and
• the light of the first color, the light of the second color, and the light of the third color are transmitted from the color converting device.