Touch display panel

A touch display panel having a display region and a non-display region, the touch display panel comprising:

• a first substrate;
• a pixel array located on the first substrate and in the display region;
• a plurality of first lead lines located on the first substrate and in the non-display region, the first lead lines being electrically connected to the pixel array;
• a second substrate located opposite to the first substrate;
• a display medium layer located between the first substrate and the second substrate;
• a touch device layer located on the second substrate, the touch device layer having a portion in a first touch region within the display region and the other portion in a second touch region within the non-display region, wherein the other portion of the touch device layer in the second touch region comprises at least one touch key separated from the touch device layer in the first touch region, and the touch device layer in the first touch region and the touch device layer in the second touch region being made of a same material;
• a plurality of second lead lines located on the second substrate and electrically connected to the touch device layer, the second lead lines extending from the first touch region to an edge of the second substrate through the second touch region;
• and
• a covering substrate, wherein the covering substrate having a transparent region and a non-transparent region, the transparent region corresponding to the display region, the non-transparent region corresponding to the non-display region, wherein the covering substrate has a transparent pattern corresponding to the at least one touch key.