Does anyone know how a touch screen work? How do we program so that any icon we wanted to press will appear in the particular spot we wanted it to be? How do we use the PC to program to let the screen to receive inputs?
2007-02-24 20:29:33 · 8 answers · asked by Forward 6 in Computers & Internet ➔ Hardware ➔ Monitors
There are many technologies involved in touchscreens. Most are either resistive or capacitive. With resistive, your touch changes the resistance path across an x,y grid in the touchscreen. This is quite robust but is prone to how it is touched and what with. With capacitive, the capacitance is measured in an x,y grid. This technology can cope with gloved hands etc.
Reading your question however you seem more interested in how to interface with one.
Most I have used are equipped with a serial interface, and come with a driver that can be called by an API or as a DCOM extension. This will allow relative screen co-ordinates of where pressed and whether a click, double click or right click has occurred. Usually a separate calibration routine is provided that generates crosses on the screen for you to press.
If simply using a touchscreen with Windows, commercial drivers are usually available that act like mouse drivers.
2007-02-27 08:29:24 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The ones I have worked on use an X Y matrix, i.e. across the screen and down the screen. Signals are sent across the matrix. When you touch, the signal is interrupted, this is read and fed to the appropriate program. This much simplified, but is basically correct.
2007-02-24 20:51:27 · answer #2 · answered by Anonymous · 1⤊ 0⤋
A touch screen is a human interface device like any other. It works using a matrix of infra-red switches across the screen, so when broken, it plots where your finger is.
2007-02-24 20:36:03 · answer #3 · answered by AlexChappel 4 · 1⤊ 0⤋
have u observed the loose internet computers in the subway/broadway a number of them are touch video show. they're referred to as touch screan because of the fact u can perform them via clicking on the seen show unit including your finger. many laptops now have a similar mechanism....
2016-12-14 05:11:01 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Heat sensors in the screen.
2007-02-24 20:32:59 · answer #5 · answered by Jack Skellington 3 · 1⤊ 1⤋
you can found out more by viewing this site www.howstuffworks.com
2007-02-24 23:29:36 · answer #6 · answered by Anonymous · 1⤊ 0⤋
you touch it and it works ha ha
2007-02-24 20:37:16 · answer #7 · answered by FOGGYTHEREDMAN 2 · 2⤊ 1⤋
see this site: http://electronics.howstuffworks.com/question716.htm
2007-03-02 12:21:31 · answer #8 · answered by BigJohnny 4 · 1⤊ 0⤋