Browse Prior Art Database

Barcode Reader Using 2D Touch Sensing

IP.com Disclosure Number: IPCOM000177036D
Publication Date: 2008-Dec-03
Document File: 5 page(s) / 43K

Publishing Venue

The IP.com Prior Art Database

Related People

Mihai Bulea: INVENTOR

Abstract

This invention describes a system for reading a DataMatrix barcode card using an imaging touch sensor. The information is stored in a DataMatrix barcode structure having all the active pixels electrically connected together and grounded either via a finger that touches the so-called “touch spot” (also electrically connected to every active pixel) or through an external connection. The DataMatrix barcode pixels are aligned to the pixels of the imaging touch sensor so that by overlapping them the capacity between the corresponding pixels can be measured by the sensor. The DataMatrix structure can be encapsulated in a card-like structure that has no active or passive components.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 30% of the total text.

Page 1 of 5

Barcode Reader Using 2D Touch Sensing Mihai Bulea

DataMatrix Barcode Reader Using 2D Touch Sensing

1. Inventor(s): Mihai Bulea
2. Synaptics Incorporated, Santa Clara, CA, USA

3. Short Summary

This invention describes a system for reading a DataMatrix barcode card using an imaging touch sensor. The information is stored in a DataMatrix barcode structure having all the active pixels electrically connected together and grounded either via a finger that touches the so-called "touch spot" (also electrically connected to every active pixel) or through an external connection. The DataMatrix barcode pixels are aligned to the pixels of the imaging touch sensor so that by overlapping them the capacity between the corresponding pixels can be measured by the sensor. The DataMatrix structure can be encapsulated in a card-like structure that has no active or passive components.

DataMatrix Barcode

Figure 1. System for reading a DataMatrix Barcode card using an imaging touch sensor - finger touching

Copyright © 2008 Synaptics Incorporated, All Rights Reserved. Page: 1 of 5

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.

Touch spot

Imaging Touch Sensor

Page 2 of 5

Barcode Reader Using 2D Touch Sensing Mihai Bulea

4. Some Problems Solved

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

This invention proposes a way of reading a DataMatrix barcode by using imaging sensing technology. The data to be read by the sensor is stored as a matrix of dispersed pixels that are electrically connected together and also connected to a touch spot. By placing a finger to the touch spot, the entire structure is grounded and the touch sensor can measure the capacities between DataMatrix pixels and the touch sensor when they are overlapped. One embodiment of this data storage structure can be a printed circuit board (PCB) card. Other embodiments could involve printing the cards with conductive ink before encapsulation. Of course, the DataMatrix structure should not be directly visible; an opaque layer should cover it.

5. General Description

An imaging sensor is able to read capacities between an array of independent touch pixels and any grounded conductive objects in their close proximity. This invention proposes using such a device to read a DataMatrix barcode embedded into a flat, card-like, assembly.

All the active pixels of the DataMatrix barcod...