Clustered scan method of a capacitive touch device

A clustered scan method of a capacitive touch device with n drive lines and m sense lines, the method comprising steps of:

• simultaneously driving multiple drive lines selected from the n drive lines in a driving cycle, wherein the multiple drive lines include the drive lines of a (i−j)th drive line to a (i+k)th drive line, and obtaining a sum of a plurality of sensing values corresponding respectively to the plurality of stimulated drive lines through one of the sense lines;
• and
• incrementing i by one and resuming the step of simultaneously driving the multiple drive lines;
• wherein i is a positive integer between 1 and n, and j and k are zero or positive integers, each of the multiple drive lines is driven by a driving signal, and a sum of all the driving signals in the driving cycle is greater than zero;
• wherein when a number of the multiple drive lines simultaneously driven in the driving cycle is even, k and j are unequal;
• wherein
• when (i−j) is less than 1, the first drive line is driven only or the first drive line to the (i+k)th drive line are simultaneously driven;
• and
• when (i+k) is greater than n, only the (i−j)th drive line to the nth drive line are simultaneously driven such that the number of the drive lines simultaneously driven when (i+k) is greater than n is less than the number of the drive lines simultaneously driven when (i+k) is equal to n.

A clustered scan method of a capacitive touch device with n drive lines and m sense lines, the method comprising:

• a single-line driving mode using a first driving signal driving bordering one of the n drive lines and obtaining a first sensing value between a stimulated bordering drive line and one of the m sense lines;
• and
• a double-line driving mode having steps of:
• simultaneously driving the ith drive line and the (i+k)th drive line in a driving cycle and obtaining a second sensing value between the two stimulated drive lines and one of the m sense lines;
• and
• incrementing i by one and resuming the step of simultaneously driving the ith drive line and the (i+k)th drive line;
• wherein i is a positive integer between 1 and n, k is equal to 1, each of the ith drive line and the (i+k)th drive line is driven by a second driving signal under the double-line driving mode, and the two second driving signals in the driving cycle respectively include a positive driving signal and a negative driving signal.