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Improved Performance for Large Surface Clickpads

IP.com Disclosure Number: IPCOM000241549D
Publication Date: 2015-May-08
Document File: 4 page(s) / 105K

Publishing Venue

The IP.com Prior Art Database

Related People

Chao-Wei Lin: INVENTOR

Abstract

Capacitive input devices such as touchpad are made of different sizes, depending on usability and/or industrial design requirements of a laptop system. However, a trend of large touchpads results in thin and/or long printed circuit boards and other sensor substrates which require some structural support to provide the desired functionality. This problem is addressed below.

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Improved Performance for Large Surface Clickpads

Chao-Wei Lin

Improved Performance for Large Surface Clickpads


1. Inventor(s): Chao-Wei Lin

2. Synaptics Incorporated, San Jose, CA, USA


3. Short Summary

Capacitive input devices such as touchpad are made of different sizes, depending on usability and/or industrial design requirements of a laptop system. However, a trend of large touchpads results in thin and/or long printed circuit boards and other sensor substrates which require some structural support to provide the desired functionality. This problem is addressed below.


4. Some Problems Solved

Examples of some of the problems addressed by the invention include:

Capacitive input devices such as touchpad are made of different sizes, depending on usability and/or industrial design requirements of a laptop system. However, a trend of large touchpads results in thin and/or long printed circuit boards and other sensor substrates which require some structural support to provide the desired functionality. Additionally, the support bracket requires tolerances which are problematic for large input devices.

This problem is addressed below.


5. General Description

The click pad includes a Printed Circuit Board with dome switch, a bracket, a Flexible Printed Circuit which is bond on the PCB through ACF process, a small plate which is attached on the FPC. The FPC is bonded on PCBA by ACF process. The small plate is in floating status in module state.

The following is one example for FPC location and geometry. Just example, it can be one end of FPC ACF with board and the other side with small plate is floating. By using two separate brackets also bring the following advantage:


• Reduce the manufacture operations and tooling complexity.

• Can use different material for hinge function (flexible steel like stainless steel) and support plate (Rigid steel like SECC/SGCC)


2. The other advantage is we provided an FPC which is bonded with PCBA. The FPC geometry can be customized that this FPC also can be extended to plug into the system connector.

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Information contained in this publication is provided as-is, with no express or implied warranties, including any warranty of merchantability, fitness for any particular purpose, or non-infringement. Synaptics Incorporated assumes no liability whatsoever for any use of the information contained herein, including any liability for intellectual property infringement. This publication conveys no express or implied licenses to any intellectual property rights belonging to Synaptics or any other party. Synaptics may, from time to time and at its sole option, update the information contained herein without notice.

Copyright © 2015 Synaptics Incorporated, All Rights Reserved.


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Improved Performance for Large Surface Clickpads

Chao-Wei Lin

Explode view

Figure 2. Structure.

Same assemble way in current system. Secure screw to match boss location. The small plate is fixed after securing scr...