Mutual capacitive touch substrate, mutual capacitive touch panel, and mutual capacitive touch apparatus

A mutual capacitive touch substrate, comprising

• a matrix of a plurality of electrode units, adjacent electrode units complementarily matching each other, each electrode unit comprising:
• a first electrode having a first undulating boundary;
• a second electrode having a second undulating boundary;
• and
• a fill pattern between the first electrode and the second electrode, having an undulating boundary substantially complementary to corresponding portions of the first undulating boundary and the second undulating boundary;
• wherein:
• the first electrode, the second electrode, and the fill pattern in a same electrode unit are electrically isolated from each other;
• the fill pattern comprises a plurality of sub-patterns;
• at least one of the plurality of sub-patterns has an irregular shape;
• the matrix of the plurality of electrode units comprises a plurality of rows of electrode units along a first direction and a plurality of columns of electrode units along a second direction perpendicular to the first direction;
• a plurality of first electrodes in each row of electrode units form a first conduction channel along the first direction;
• a plurality of second electrodes in each column of electrode units form a second conduction channel along the second direction;
• and
• midlines of first conduction channels are spaced apart by a distance in the range of about 3 mm to about 6 mm.