A display panel has active region, peripheral region, and includes active device array substrate, color filter substrate, spacers, and display medium. The active device array substrate includes first substrate and active device array layer. The color filter substrate includes second substrate, black matrix layer, overcoat layer, and color filter layer. The color filter layer includes color filter patterns in active region and dummy color filter patterns in peripheral region. The color filter patterns and the dummy color filter patterns define a portion of blank areas outside areas of the color filter patterns and the dummy color filter patterns arranged in a first direction. The dummy color filter patterns includes an opening to define another portion of the blank areas. The blank areas include first blank areas in active region and second blank areas in peripheral region. The first and second blank areas have different widths in the first direction.