Elan Microelectronics Corporation

Yi-Shiang Lu

Tsz-Hsuan Chao

Chia-Hsing Lin

Po-Hao Kuo

Yi-Shu Li

A clustered scan method of a capacitive touch device is disclosed. According to the method, n drive lines of the capacitive touch device are divided into multiple clusters. Each of the clusters has a same number of drive lines. The clusters are driven by a clustered scan procedure in sequence. In each clustered scan procedure, the drive lines of the present cluster are driven for b times, wherein b is equal to the number of the drive lines of each cluster. If at least one bordering drive line exists, a bordering clustered scan procedure is executed, and a bordering drive line and some of drive lines of the previous clusters are driven.

Clustered scan method of capacitive touch device

A clustered scan method of a capacitive touch device has steps of simultaneously providing driving signals in one driving cycle to multiple driving lines including the (i&#x2212;j)drive line to the (i+k)drive line, and simultaneously providing driving signals in a next driving cycle to the drive lines including some of the drive lines driven in the previous driving cycle with a sum of the driving signal in each driving cycle greater than zero. When the stimulated drive lines include a bordering drive line, the driving lines are determined according to a relationship among i, j and k. Accordingly, the signal to noise ratio of the touch device can be increased and the adverse effect for common ground occurring between a measuring system and a human body can be reduced so that the multi-finger positioning issue can be resolved.

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Tainan, Taiwan

Yi-Shiang Lu