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In-molded resistive and shielding elements

A technology of resistive elements and internal resistance, applied in the field of touch-sensitive switches, can solve the problem that capacitive switches are not easily integrated into structures with contoured shapes.

Inactive Publication Date: 2013-02-13
INK LOGIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known capacitive switch production techniques are not well suited for integrating switches into three-dimensional support structures such as user interfaces such as control panels
Additionally, existing capacitive switches are not easily integrated into contoured structures—without using complex components and adjustment procedures

Method used

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  • In-molded resistive and shielding elements
  • In-molded resistive and shielding elements
  • In-molded resistive and shielding elements

Examples

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Embodiment Construction

[0026] The present invention relates to in-mold switching devices. A preferred embodiment of the present invention involves a capacitive switch that can be placed in a mold. Additionally, the capacitive switches may also be molded within the three-dimensional structure. As mentioned above, capacitive switches detect changes in capacitance caused by disturbances defined as switching events. The invention also relates to in-mold resistors and shielding elements.

[0027] In one embodiment, when a conductive or charged object such as a finger is placed close to the sensing area, the capacitance of the sensing area changes, indicating that a switching event has occurred. The capacitance change of the sensing area can be detected by the detection circuit. The detection circuit can be tuned to detect specific changes in capacitance. For example, the detection circuitry can be adjusted to detect the presence of a finger close to the sensing area, but not detect other types of dis...

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Abstract

An article of manufacture having an in-molded resistive and / or shielding element and method of making the same are shown and described. In one disclosed method, a resistive and / or shielding element is printed on a film. The film is formed to a desired shape and put in an injection mold. A molten plastic material is introduced into the injection mold to form a rigid structure that retains the film.

Description

[0001] Cross References to Related Applications [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 12 / 106,250, filed April 18, 2008, which in turn claims U.S. Provisional Patent Application 60 / 925,421 (filed Priority of April 20, 2007), both US applications are hereby incorporated by reference in their entirety. technical field [0003] This invention relates to touch sensitive switches, and more particularly, to capacitive switches built into plastic structures. The invention also relates to in-mold resistors and shielding elements. Background technique [0004] Touch-sensitive switches are used, for example, in household appliances (such as touch panels on stoves, washers and dryers, blenders, toasters, etc.) and portable devices (such as IPODs, phones). Typically touch sensitive switches utilize either resistive film sensing or capacitive sensing. Resistive film sensing utilizes two conductive resistive plates separated by a very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C1/06
CPCH03K17/962H01H11/04H03K2217/96019H03K2217/960785B29L2031/466H03K2217/96079H03K2217/960755B29C45/14639B29C2045/14237B29K2995/0011H05K9/0092H03K17/9622Y10T29/49082
Inventor 罗纳德·H·哈格杰弗里·R·恩格尔威廉·W·博迪
Owner INK LOGIX