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Physical force capacitive touch sensor

A technology of capacitive sensor and touch sensor, which is applied in the field of capacitive touch sensor and can solve problems such as hindering backlighting

Active Publication Date: 2019-05-21
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that the deformable metal target layer is opaque and thus hinders its backlighting
Existing published solutions for capacitive touch sensor designs are mechanically extremely thin

Method used

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  • Physical force capacitive touch sensor
  • Physical force capacitive touch sensor
  • Physical force capacitive touch sensor

Examples

Experimental program
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Effect test

Embodiment Construction

[0061] According to the teachings of the present invention, a capacitive touch sensor includes a capacitive sensor element on a substrate, a physically deformable electrically insulating spacer above the capacitive sensor element, and a conductive deformable plane above the physically deformable electrically insulating spacer, which It is substantially parallel to the capacitive sensor element. The conductive deformable plane is connected to the power supply common point and / or grounded to form a capacitor with a capacitive sensor element and used to improve the capacitive sensor element from static electricity and electromagnetic interference and its false triggering. The protective cover can be placed over the conductive deformable plane to act as an environmental seal for improved physical and weather protection, but is not necessary for the operation of the capacitive touch sensor.

[0062] When the user presses down on the proximity area of ​​the target (for example, letters...

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Abstract

A physical force capacitive touch sensor comprises a capacitive sensor element on a substrate, a physically deformable electrically insulating spacer over the capacitive sensor element and a conductive deformable plane over the physically deformable electrically insulating spacer. A protective deformable fascia may be placed over the conductive deformable plane to provide an environmental seal for physical and weather protection, but is not essential to operation of the capacitive touch sensor. Back lighting is accomplished through a light transmissive layer(s) in the capacitive touch sensor. When the conductive deformable plane is displaced toward the capacitive touch sensor element, the capacitance value of the capacitive touch sensor element changes and that change may be detected and used as an actuation signal.

Description

[0001] Related patent applications [0002] This application is a partial continuation of the U.S. Patent Application No. 13 / 468,504 filed on May 10, 2012; the U.S. Patent Application No. 13 / 468,504 is No. 12 / 787,474 filed on May 26, 2010 A continuation of the US patent application; US patent application No. 12 / 787,474 claims priority to US provisional patent application No. 61 / 238,718 filed on September 1, 2009. [0003] This application is a partial continuation of the U.S. Patent Application No. 12 / 556,191 filed on September 9, 2009; the U.S. Patent Application No. 12 / 556,191 claims No. 61 / 108,648 filed on October 27, 2008 Priority for US provisional patent applications. The content of all said applications is hereby incorporated by reference for all purposes. Technical field [0004] The present invention relates to electronic capacitive touch sensors, such as buttons, buttons, sliders, rotations, etc.; and more specifically, to a safer capacitive touch sensor, which requires o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/96G06F3/044H03K17/975H03K17/98
CPCG06F3/03547G06F3/03548G06F3/0443G06F3/0447G06F3/04886H03K17/962H03K17/9622H03K17/975H03K17/98H03K2017/9602H03K2217/9653
Inventor 基思·柯蒂斯法尼·杜芬哈格
Owner MICROCHIP TECH INC