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Method to Uniformly Illuminate the Length of a 1D ScrollStrip

IP.com Disclosure Number: IPCOM000175583D
Publication Date: 2008-Oct-14
Document File: 3 page(s) / 48K

Publishing Venue

The IP.com Prior Art Database

Related People

Fred Caldwell: INVENTOR

Abstract

This invention describes a method for mounting a 1-Dimensional ScrollStrip and a light guide on the same plane. The 1D ScrollStrip is divided into two parallel 1D ScrollStrips, allowing for a light guide to be inserted between the scrollstrips. This design allows for the light guide and the ScrollStrips to be mounted directly underneath a top plastic layer without having to mount the scrollstrips or light guide on top of the other.

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Method to Uniformly Illuminate the Length of a 1D ScrollStrip Fred Caldwell

Method to Uniformly Illuminate the Length of a 1D ScrollStrip

1. Inventor(s): Fred Caldwell
2. Synaptics Incorporated, Santa Clara, CA, USA

3. Short Summary

This invention describes a method for mounting a 1-dimensional ScrollStrip and a light guide on the same plane. The 1D ScrollStrip is divided into two parallel 1D ScrollStrips, allowing for a light guide to be inserted between the scrollstrips. This design allows for the light guide and the ScrollStrips to be mounted directly underneath a top plastic layer without having to mount the scrollstrips or light guide on top of the other.

Figure 1: A volume slider with even illumination along its length.

Top Plastics (Lens)

L

ED

Light Guide

PCB of MMB

Figure 2: Section view of a MultiMedia Button (MMB) with a Light Guide mounted between the MMBs and

a top plastic layer

Copyright © 2008 Synaptics Incorporated, All Rights Reserved. Page: 1 of 3

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.

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Method to Uniformly Illuminate the Length of a 1D ScrollStrip Fred Caldwell

4. Some Problems Solved

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

The described invention solves the problem of uniformly lighting the length of a 1D ScrollStrip, where the mounting of the ScrollStrip prohibits the use of either a reverse-mounted method or a mounting method that places a light guide on top of the ScrollStrip (as depicted in Figure 1). The invention provides for increased flexibility for mounting a 1D ScrollStrip when there is a need for uniform illumination along the length of the ScrollStrip. Further, this invention does not increase the distance between a ScrollStrip and a top plastic layer. When the distance between a ScrollStrip and a top plastic layer is increased, it becomes difficult to properly sense an intended interaction of an input finger. By allowing for both a ScrollStrip and light guide to be mounted directly to a top plastic layer the distance between the ScrollStrip and top plastic layer is minimized and the ScrollStrip can also be uniformly illuminated.

5. General Description

ScrollStrips

Figure 3: 1D ScrollStrip with Light-Guide in Center....