A scan driving method for a display panel is disclosed. The color filter includes a plurality of color filter units and a black matrix layer. The color filter units are arranged in a matrix form, and the position of each color filter unit corresponds to that of a sub-pixel unit of a liquid crystal display apparatus. The black matrix layer is formed between the color filter units, and a cross section of the black matrix layer between two adjacent color filter units has an upper portion with a larger width and a lower portion with a smaller width.