TOUCH POINT DETECTING CIRCUIT, INDUCTIVE TOUCH SCREEN AND TOUCH DISPLAY DEVICE

摘要

A touch point detecting circuit, an inductive touch screen and a touch display device are disclosed. The touch point detecting circuit includes a plurality of mutually inductive units arranged in an array, wherein each mutually inductive unit includes a first coil and a second coil which are mutually coupled inductors, the first coil of each mutually inductive unit in a same row is electrically connected to an identical first signal line, and the second coil of each mutually inductive unit in a same column is electrically connected to an identical second signal line. By adopting the touch point detecting circuit provided in the technical solution, not only may the detection precision be relatively high, but also the positions of touch points may be determined by detecting the mutual inductance change of each mutually inductive unit, so that multi-point touch is realized.

主权项

1. A touch point detecting circuit, comprising:
a plurality of mutually inductive units arranged in an array, wherein each mutually inductive unit comprises a first coil and a second coil which are mutually coupled inductors, wherein the first coil of each mutually inductive unit in a same row is electrically connected to an identical first signal line, and the second coil of each mutually inductive unit in a same column is electrically connected to an identical second signal line, wherein each first signal line is electrically connected to an input terminal of a touch scanning signal, and different first signal lines are electrically connected to different input terminals respectively; each second signal line is electrically connected to an output terminal of the touch scanning signal, and different second signal lines are electrically connected to different output terminals respectively; or each first signal line is electrically connected to an output terminal of a touch scanning signal, and different first signal lines are electrically connected to different output terminals respectively; each second signal line is electrically connected to an input terminal of the touch scanning signal, and different second signal lines are electrically connected to different input terminals respectively.