CAPACITIVE SENSING ARRAY DEVICE WITH HIGH SENSITIVITY AND HIGH FRAME RATE AND ELECTRONIC APPARATUS USING THE SAME

摘要

In a capacitive sensing array device and an electronic apparatus, a coupling signal source provides a coupling signal to an object, a constant voltage source provides a constant voltage to a shielding conductor group, and a vertical parasitic capacitor is formed between the shielding conductor group and each sensing electrode. Each sensing electrode is electrically connected to the constant voltage source via one corresponding switch module. When one sensing electrode is selected to perform sensing, the corresponding switch module is set as an open state such that the selected sensing electrode is disconnected from the constant voltage source, while the other sensing electrodes are electrically connected to the constant voltage source via their corresponding switch modules configured as short-circuit states, so that a horizontal parasitic capacitor is formed between the selected sensing electrode and the other sensing electrodes. The shielding conductor group comprises shielding conductor layers on shielding planes.

主权项

1. A capacitive sensing array device, comprising:
sensing electrodes separately arranged in an array, wherein a sensing capacitor is formed between the sensing electrode and an object; a shielding conductor group disposed below the sensing electrodes; a coupling signal source providing a coupling signal coupled to the object; a constant voltage source providing a constant voltage to the shielding conductor group, so that a stable vertical parasitic capacitor is formed between the shielding conductor group and each of the sensing electrodes; and multiple switch modules electrically connected to the sensing electrode and the constant voltage source in a one-to-one manner, wherein when one of the sensing electrodes is selected to perform sensing, the switch modules are configured such that the selected sensing electrode is disconnected from the constant voltage source, while the other sensing electrodes are electrically connected to the constant voltage source, so that a stable horizontal parasitic capacitor is formed between the selected sensing electrode and the other sensing electrodes, wherein the shielding conductor group comprises multiple shielding conductor layers disposed on multiple shielding planes.