Touch display devices

A touch display device, comprising:

• a substrate, having a plurality of pixel units, wherein there is a pixel pitch between each two adjacent pixel units, the pixel units individually include a plurality of sub-pixels, each one of the sub-pixels has a sub-pixel area;
• and
• a first touch grid disposed on the substrate, defining a touch area of the substrate, wherein the first touch grid comprises:
• a plurality of first conductive portions, wherein each the plurality of first conductive portions has a first boundary and a second boundary opposite to the first boundary;
• a plurality of second conductive portions, wherein each the plurality of second conductive portions has a third boundary and a fourth boundary opposite to the third boundary, wherein
• the plurality of first conductive portions are substantially parallel to each other, the plurality of second conductive portions are substantially parallel to each other, and an area surrounded by two adjacent first conductive portions of the plurality of first conductive portions and two adjacent second conductive portions of the plurality of second conductive portions is defined as an open region, wherein
• an extension line of the first boundary adjacent to the open region intersects an extension line of the third boundary adjacent to the open region to form a first intersection, the extension line of the first boundary adjacent to the open region intersects an extension line of the fourth boundary adjacent to the open region to form a second intersection, an extension line of the second boundary adjacent to the open region intersects the extension line of the third boundary adjacent to the open region to form a third intersection, the extension line of the second boundary adjacent to the open region intersects the extension line of the fourth boundary adjacent to the open region to form a fourth intersection, and
• a distance between the first intersection and the fourth intersection is defined as a first pitch, wherein
• a ratio of the first pitch to the pixel pitch satisfies the following relationship:
• n×50%+25%−A %≤R1≤n×50%+25%+A %,
• wherein R1 is the ratio of the first pitch to the pixel pitch, n is a positive integer less than or equal to 30, and A is 0 or a positive integer less than or equal to 10.