The invention provides a single-layer electrode structure. The structure comprises multiple first serial electrode assemblies arranged in the first direction, multiple second serial electrode assemblies arranged in the first direction, and multiple third serial electrode assemblies arranged in the first direction, wherein each first serial electrode assembly comprises at least one first electrode arranged in the second direction, each second serial electrode assembly comprises multiple second electrodes arranged in the second direction, each second electrode corresponds to at least one first electrode, and each third electrode is located between two corresponding first serial electrode assemblies, or between two corresponding second serial electrode assemblies, or between the corresponding first serial electrode assemblies and the corresponding second serial electrode assemblies.