Touch display panel

A touch display panel, comprising:

• a display structure comprising a plurality of pixels, the pixels having a first pitch P1;
• and
• a touch structure comprising a touch layer, the touch layer having a plurality of slits and a plurality of dummy clefts, each of the slits having a plurality of vertices, wherein the slits defines a plurality of traces and a plurality of touch regions, and the dummy clefts are disposed in the touch regions,
• wherein the slits have a second pitch P2 in a first direction, the dummy clefts have a third pitch P3 in the first direction, and adjacent two of the vertices of each of the slits define a line segment, wherein the line segment has a first length Ly in a second direction perpendicular to the first direction;
• wherein a first moire ratio MR1 is defined as
• P
• 
• 
• 2
• P
• 
• 
• 1
• ,
• and the first moire ratio MR1 substantially satisfies a formula (1):
• 20.7%×A1+8.5%×B1−3%≦MR1≦12.7%×A1+16.5%×B1+3% (1),
• wherein A1 is an integer from 0 to 3, B1 is an integer from 1 to 3, and 0≦B1−A1≦1;
• wherein a second moire ratio MR2 is defined as
• P
• 
• 
• 3
• P
• 
• 
• 1
• ,
• and the second moire ratio MR2 substantially satisfies a formula (2):
• 20.7%×A2+8.5%×B2−3%≦MR2≦12.7%×A2+16.5%×B2+3% (2),
• wherein A2 is an integer from 0 to 3, B2 is an integer from 1 to 3, and 0≦B2−A2≦1;
• wherein an arrangement ratio LR is defined as
• Ly
• P
• 
• 
• 1
• ,
• and the arrangement ratio LR substantially satisfies a formula (3):
• (2C+1)×25%−20%≦LR≦(2C+1)×25%+20% (3),
• wherein C is an integer from 0 to 11.