Touch Screen Displays

[embeddedlover]

Hi,

I want to have some pointers on present touch screen module market like,

1. Leaders in this market,
2. Type of touch screen to use
3. Interface to a processor/controller... etc.,

 

[horace1]

have a look at the Microchip touch screen information
Microchip Technology Inc. is a Leading Provider of Microcontroller and Analog Semiconductors, providing low-risk product development, lower total system cost and faster time to market for thousands of diverse customer applications worldwide.

 

[mehtadhaval]

2. Type of touch screen to use

Their mainly 2 types Touch screens that are dominant,
1). Resistive touch screen : Cheap and easy to use. Used in low-price phones and gadgets. Also, widely used in Embedded Systems
2). Capacitive touch screen : Expensive, but excellent in sensitivity and somewhat difficult to use. Used in high-priced gadgets and phones.

3. Interface to a processor/controller... etc.,

Each touch screens have different of interfacing....
You can find how to interface resistive touch screen with microcontroller here :
•••> Electronics in DAM's way: Touch Screen Interfacing with microcontroller

 

[embeddedlover]

You can find how to interface resistive touch screen with microcontroller here :

nice blog...very informative....it will be helpful to everyone if you don't mind adding schematic/BoM....

 

[mehtadhaval]

nice blog...very informative....

thank you....

it will be helpful to everyone if you don't mind adding schematic/BoM....

yes, I will upload the ckt diagram and code in a few days....

 

[embeddedlover]

Is it that i can add a touch screen sensor separately to my old LCD?

 

[mehtadhaval]

Is it that i can add a touch screen sensor separately to my old LCD?

Yes you can add touch screen to your Graphics LCD. You have to get the touch screen same in size as the Graphics LCD and fix the touch screen firmly on the Graphics LCD. And you have to add the interfacing logic of the touch screen to your program code.

 

[embeddedlover]

If a touch screen sensor is to be added any precautions to be taken?
How to interface the newly added touch sensor to my controller?

 

[mehtadhaval]

If you're adding touch screen to your project, you must be knowing which kind of touch screen you have, because there are lots of touch screens available each having different configurations.

How to interface the newly added touch sensor to my controller?

I only know how to interface a 4-wire resistive touch screen. If you want to know how to do that, go to the link I've posted earlier. I've added sample code for LPC2148 controller.