Locke Lord LLP
In-cell touch screen and a method of driving the same
The present invention is directed to a method of driving an in-cell touch screen. Source lines underlying a current VCOM electrode are divided into n groups. A first voltage is applied at the current VCOM electrode in a conversion phase of each sensing period. A second voltage is applied at each group of the source lines underlying the current VCOM electrode in a manner such that no net charge being contributed to the VCOM electrode by the underlying source lines, thereby parasitic capacitors associated with the current VCOM electrode having no effect on touch sensing result.
HIMAX TECHNOLOGIES LIMITED
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inventional inventional inventional inventional
Yaw-Guang Wei-Song
Chang Wang