Elan Microelectronics Corporation

Tsz-Hsuan Chao

Yi-Shiang Lu

Chia-Hsing Lin

Po-Hao Kuo

Yi-Shu Li

Sheng-Tsai Huang

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.

Clustered scan method of a capacitive touch device

A method for identifying multiple touch objects has steps of reading at least one touched cluster to be identified in a sensing frame, determining a range of each one of the at least one touched cluster to be identified, comparing the range of each touched cluster to be identified with a first preset division range, if the range of the touched cluster to be identified exceeds the first preset division range, reducing a sensing value of each one of at least one middle sensing point within the first touched cluster to be divided, determining a count of center sensing points of each first touched cluster to be divided, and dividing the first touched cluster to be divided containing multiple center sensing points. Accordingly, the present invention correctly identifies multiple touch objects from a single touched cluster arising from an excessively large line-to-line space.

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Guishan, Taiwan

Tsz-Hsuan Chao