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Touch-sensing device

A technology for touch devices and sensing electrodes, which is applied in instruments, electrical digital data processing, electrical components, etc., and can solve problems such as reduced touch performance, complex shapes, and electric field distortion

Inactive Publication Date: 2016-03-30
INNOLUX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] refer to figure 1 , when the electrode pattern of the known square touch device is applied to the circular touch device 1, the irregular electrode part 2 will be formed on the edge of the circular touch device 1, so electric field distortion and touch performance degradation will occur
The shape of the irregular electrode part 2 is very complex and special, and these various electrode shapes result in electric field distortion and reduced touch performance

Method used

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Examples

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Embodiment Construction

[0054] Figure 2A A circuit diagram showing a mutual capacitance sensing input device according to an embodiment of the present disclosure, Figure 2B show Figure 2A operation of the circuit. refer to Figure 2A And 2B, in the mutual capacitance sensing input device, the control circuit of the driving electrode (Tx) includes a voltage source and a switch to provide a step input to the driving electrode (Tx) for scanning, on the other hand, the receiving electrode (Rx) It includes a charge amplifier (Op-Amp), capacitors and switches to convert a charge to a voltage for an analog-to-digital converter ADC. The charge transferred from the driving electrode (Tx) to the receiving electrode (Rx) is equal to the amount of capacitive coupling between the two, which is affected (reduced) by the conductor (eg finger) as a shielding effect. Therefore, measuring the voltage output of the charge amplifier can realize finger detection.

[0055] Figure 3A A touch device 100 a accordin...

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PUM

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Abstract

A touch-sensing device is provided. The touch-sensing device includes a central sensing pad and a plurality of first sensing pads. The central sensing pad consists of a single sensing pad. The first sensing pads are arranged along a first annular path surrounding the central sensing pad.

Description

technical field [0001] The present disclosure relates to a touch device, in particular to a touch device with fewer receiving electrodes. Background technique [0002] Capacitive touch devices have been widely used in portable electronic devices. In general, when two conductive elements are close to each other but not in contact, the electric fields of the two interact to create capacitance. In capacitive touch devices, when an object (such as a finger) touches the touch surface, a small capacitance is generated between the object and the sensing points of adjacent objects. By sensing the change in capacitance at each sensing point and recording the positions of these sensing points, the sensing circuit can identify multiple objects and determine their position, pressure, direction, velocity, and acceleration as they move across the touch surface . [0003] refer to figure 1 , when the electrode pattern of the known square touch device is applied to the circular touch de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCH03K17/9622H03K2017/9604H03K2217/960715H03K2217/960775G06F3/0443G06F3/0448
Inventor 桥本和幸
Owner INNOLUX CORP