Browse Prior Art Database

Resistive Planes Touch LCD

IP.com Disclosure Number: IPCOM000123572D
Original Publication Date: 1999-Jan-01
Included in the Prior Art Database: 2005-Apr-05
Document File: 1 page(s) / 25K

Publishing Venue

IBM

Related People

Kanzaki, E: AUTHOR [+3]

Abstract

Disclosed is a device for providing touch input function inside of LCD module with forming resistive planes between the backside of polarizer and the top of color filter glass. Usually the additional plastic films or glasses which have touch input function is added on the top of LCD module. Using both polarizer film and the color filter glass avoids to add the plastic films and/or glasses for touch input function. This means this method enables to provide thinner, light weight, and low cost LCD module with touch input function.

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Resistive Planes Touch LCD

   Disclosed is a device for providing touch input function
inside of LCD module with forming resistive planes between the
backside of polarizer and the top of color filter glass.  Usually
the additional plastic films or glasses which have touch input
function is added on the top of LCD module.  Using both polarizer
film and the color filter glass avoids to add the plastic films
and/or glasses for touch input function.  This means this method
enables to provide thinner, light weight, and low cost LCD module
with touch input function.

   Two resistive planes are required to provide the touch
function.  1st resistive plane is formed on the back side of
polarizer.  2nd resistive plane is formed on the color filter glass.
Two of them are sandwiched with a lot of spacers and pasted at the
edges.  Also resistive planes have the electrical contacts which are
made of a conductive material.  From the edges and/or the corners,
sensing signals are wired to the sensing circuits.  Sensing circuits
may be including in the LCD control circuits.