METHOD FOR DIVIDED SCANNING OF TOUCH PANNEL

摘要

The present disclosure relates to a method for divided scanning of a touch panel, in which a touch panel scanning process is divided into a pre-scan process and a main scan process. According to the embodiment of the present invention, a touch panel scan process, which had been performed in existing touch panels, may be divided into a pre-scan process and a main scan process, and the performed in various manners. Thus, while power consumption is reduced, the speed of response to an external touch can be improved.

主权项

1. A method for scanning a touch panel, which scans a touch panel in order to recognize a position of a touch on the touch panel when the touch panel is touched by an external object,
wherein the process of scanning the touch panel is divided into: a pre-scan process of dividing the touch panel into a plurality of blocks and sensing in which of the blocks the touch occurred; and a main scan process of calculating an exact coordinate of the touch in the block where the occurrence of the touch was sensed, according the result of the pre-scan process, a touch coordinate calculated through the main scan process at a previous frame and a touch coordinate calculated through the main scan process at a current frame are used to calculate the motion speed of the external object, and a low-power operation mode and a high-speed response operation mode are automatically switched to each other according to the calculated motion speed of the external object, wherein in the low-power operation mode, driving lines are driven and values of respective nodes are read through input lines in the block where the touch occurred, and the other blocks in which no touch occurs are set to non-scan regions where the driving lines are not driven during a driving time of the touch panel and the values of the respective nodes are not read through the input lines, and in the high-speed response operation mode, the driving lines are driven and the values of the respective nodes are read through the input lines in the block where the touch occurred, but the driving time of the touch panel is omitted and the operation of the next frame is performed in the other blocks where no touch occurs.