Abstract: A color filter including a substrate and a color filter layer is disclosed. The color filter layer is disposed on the substrate and includes a red photonic crystal structures, a green photonic crystal structure and a blue photonic crystal structure. The red photonic crystal structure includes a first defect resonance cavity and has multiple first holes surrounding the first defect resonance cavity. The green photonic crystal structure includes a second defect resonance cavity and has multiple second holes surrounding the second defect resonance cavity. The blue photonic crystal structure includes a third defect resonance cavity and has multiple third holes surrounding the third defect resonance cavity. Wherein, the hole diameter of the first holes is less than the hole diameter of the second holes, and the hole diameter of the second holes is less than the hole diameter of the third holes.

Abstract: A high brightness liquid crystal display (LCD) is provided. In the LCD, plural light-focusing areas are disposed on a first substrate or a first polarizer, near the backlight module, right below the transparent areas on a second substrate to increase brightness of the LCD. Each of the light-focusing areas comprises at least a high-refractive area having higher refractive index.