Electrowetting display panel with opaque insulating layer

An electrowetting display panel, comprising:

• a first substrate,
• a second substrate opposite to the first substrate,
• a plurality of baffle walls disposed on the second substrate and defining a plurality of sub-pixels, wherein the plurality of baffle walls extend from the second substrate to the first substrate,
• an opaque insulating layer disposed on the second substrate, the opaque insulating layer comprising a dielectric layer and opaque liquid elements disposed on the dielectric layer;
• a plurality of colored liquid elements corresponding to the individual sub-pixels respectively and disposed between the opaque insulating layer and the first substrate, the colored liquid elements being an electric-conductive or polar light-transmissive color solution and being independent from the opaque liquid elements;
• and
• a plurality of pixel electrodes corresponding to the individual sub-pixels respectively and disposed between the second substrate and the opaque insulating layer, wherein
• in each sub-pixel, one of the dielectric layer, the opaque liquid element and the pixel electrode is black, and
• in each sub-pixel, the opaque liquid element is capable of contracting around the baffle wall or expanding on the dielectric layer by controlling a voltage applied to the pixel electrode.