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System and method to share electrodes between capacitive touch controller and gesture detection device

A touch controller, gesture detection technology, applied in the direction of instruments, electrical digital data processing, data processing input/output process, etc., can solve the problems of incompatibility, separate sensors, etc.

Active Publication Date: 2015-01-07
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with regard to the sensors, the two systems are generally not compatible and thus in conventional systems a combined touch and gesture detection system requires a separate sensor

Method used

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  • System and method to share electrodes between capacitive touch controller and gesture detection device
  • System and method to share electrodes between capacitive touch controller and gesture detection device
  • System and method to share electrodes between capacitive touch controller and gesture detection device

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Embodiment Construction

[0023] According to various embodiments, two main concepts and two variants of sharing electrodes between a gesture detection controller and a capacitive touch controller can be provided. The first concept implemented with SPDT (Single Pole Double Throw) multiplexers is generally applicable in other situations as well to share signals between two or more devices. Another concept and its variants are specified for gesture detection systems. The other concept and its variants can be implemented without any additional devices or only with SPST (Single Pole Single Throw) switches. According to various embodiments, the electrodes for gesture detection can be shared with the capacitive touch controller by using a low-cost solution that also provides good performance with respect to settling time and signal strength. According to various embodiments, the gesture detection system works with the touch controller in a time multiplexed mode. This means that gesture detection and touch ...

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Abstract

A system may have a touch controller, a gesture detection device, and a capacitive sensor having at least one first and at least one second electrode, wherein the at least one first electrode is coupled with a controllable generator for supplying an AC signal to the first electrode. Furthermore, a configurable coupling is provided between the at least one second electrode, an input of the touch controller and an input of the gesture detection device, wherein the coupling can be configured to allow the system to perform a touch detection from signals received from the second electrode by the touch controller in a first configuration mode and to perform a gesture detection from signals received from the second electrode by the gesture detection device in a second configuration mode.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 609,538, filed March 12, 2012, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to capacitive touch technology and, in particular, to a system and method for sharing electrodes with a capacitive touch controller. Background technique [0004] Capacitive sensors are commonly used in touch sensing systems. In such systems, the user is required to touch the operator panel to allow such touch to be sensed by the system's corresponding detection circuitry. More advanced systems do not require touch, but sense gestures made in the area above the operator panel. For example, there is the generation of this electric field, e.g. using a signal in the 100 kHz range and a plurality of detection electrodes designed to measure the disturbance of the electric field to allow determination of, fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F2203/04101G06F3/0416G06F3/044
Inventor 张策
Owner MICROCHIP TECH INC