Color filter substrate and liquid crystal display device

A color filter substrate, comprising:

• a first substrate, a black matrix and a color film layer provided on the first substrate, wherein the color film layer comprises a plurality of pixel units arranged periodically and repeatedly in a matrix, each pixel unit comprises at least two sub-pixels of different colors, each sub-pixel comprises a color filter film, a first common electrode disposed on the color filter film, and a dielectric layer disposed on the first common electrode, wherein the thicknesses of the dielectric layer at at least two locations within each pixel unit are different,
• wherein the thicknesses of the dielectric layer at at least two locations are different in at least one sub-pixel of each pixel unit,
• wherein in each sub-pixel of each pixel unit, the dielectric layer is divided into two regions, a central region and a peripheral region surrounding the central region, which respectively have two different thicknesses, a first thickness at the peripheral region and a second thickness at the central region, and the first thickness is larger than the second thickness.