Touch display panel

A touch display panel comprising:

• a pixel circuit substrate, having a display area and a peripheral area outside the display area, wherein the pixel circuit substrate comprises:
• a plurality of pixel structures, disposed in the display area, wherein each of the plurality of pixel structures has an active element and a pixel electrode electrically connected to each other;
• a plurality of data lines, electrically connected to a plurality of active elements of the plurality of pixel structures;
• a plurality of touch sensing electrodes, disposed in the display area, overlapped with a plurality of pixel electrodes of the plurality of pixel structures, and separated from each other;
• a plurality of touch signal lines, electrically connected to the plurality of touch sensing electrodes;
• and
• at least one test circuit, disposed in the peripheral area and electrically connected to at least part of the plurality of touch signal lines or the plurality of data lines, wherein the test circuit comprises:
• a peripheral line, extending from a first side of the display area to a second side of the display area, wherein the first side is opposite to the second side;
• and
• a first test pad and a second test pad, respectively disposed on the first side and the second side of the display area and electrically connected to the peripheral line;
• a color filter substrate, disposed opposite to the pixel circuit substrate;
• and
• a display medium layer, disposed between the pixel circuit substrate and the color filter substrate, wherein the plurality of touch sensing electrodes are arranged into q touch electrode strings in a first direction, the at least one test circuit are m test circuits electrically insulated from each other, and each of the q touch electrode strings is electrically connected to the m test circuits, where m and q are positive integers greater than 1, and each of them test circuits further comprises n test pads, disposed between the first test pad and the second test pad and electrically connected to the peripheral line, where n is a positive integer.

A touch display panel comprising:

• a pixel circuit substrate, having a display area and a peripheral area outside the display area, wherein the pixel circuit substrate comprises:
• a plurality of pixel structures, disposed in the display area, wherein each of the plurality of pixel structures has an active element and a pixel electrode electrically connected to each other;
• a plurality of data lines, electrically connected to a plurality of active elements of the plurality of pixel structures;
• a plurality of touch sensing electrodes, disposed in the display area, overlapped with a plurality of pixel electrodes of the plurality of pixel structures, and separated from each other;
• a plurality of touch signal lines, electrically connected to the plurality of touch sensing electrodes;
• and
• at least one test circuit, disposed in the peripheral area and electrically connected to at least part of the plurality of touch signal lines or the plurality of data lines, wherein the test circuit comprises:
• a peripheral line, extending from a first side of the display area to a second side of the display area, wherein the first side is opposite to the second side;
• and
• a first test pad and a second test pad, respectively disposed on the first side and the second side of the display area and electrically connected to the peripheral line;
• a color filter substrate, disposed opposite to the pixel circuit substrate;
• and
• a display medium layer, disposed between the pixel circuit substrate and the color filter substrate, wherein the plurality of pixel structures comprise a plurality of first pixel structures, a plurality of second pixel structures, and a plurality of third pixel structures alternately arranged in a first direction, the plurality of data lines comprise a plurality of first data lines electrically connected to the plurality of first pixel structures, a plurality of second data lines electrically connected to the plurality of second pixel structures, and a plurality of third data lines electrically connected to the plurality of third pixel structures, the at least one test circuit comprises a first test circuit, a second test circuit, and a third test circuit electrically insulated from each other, the first test circuit is electrically connected to the plurality of first data lines, the second test circuit is electrically connected to the plurality of second data lines, and the third test circuit is electrically connected to the plurality of third data lines, wherein the first side and the second side of the display area are two opposite sides of the display area in the first direction, and the first pixel structure, the second pixel structure, and the third pixel structure are respectively configured to display different colors.