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Help: Which touchscreen is capacitive?

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  • Help: Which touchscreen is capacitive?

    Hi guys first time poster but I hang on another board and just discovered this a little while ago.

    I work on touchscreens at my work and we use resistive since it isn't a real need for clarity and prevention of current surges.

    I have read about xenarc lilliput and so on looking to find a spec sheet and find out if they are capacitive. Unlike other new guys to forums I did do a search and can't get a definitive answer. I am really particular about my touchscreen i will be using and price won't be an option if it means i won't have to deal with bull$%#^.

    I appreciate the help and anything I can do to help any of you let me know.

  • #2
    From what I have seen, all of the touch screens on Lilli's, Super's, Xenarc's, etc. al use 4 wire resistive panels. Capacitive panels and controlllers are more expensive.

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    • #3
      Originally posted by Motorcity
      From what I have seen, all of the touch screens on Lilli's, Super's, Xenarc's, etc. al use 4 wire resistive panels.


      Renault Megane...the OEM look

      The Lost in Europe Ford Escort

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      • #4
        Im pretty sure that everything uses 4 wire resistive except xenarc's which use 5 wire resistive.

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        • #5
          do you guys notice after time and not mounting as well as it should be they short out?

          i know it happens in the industrial world which is why we switched to capacitive, but i guess 5 wire isnt bad lot less current fluctuation.

          one more thing who offers an HD touchscreen? cause the car puter im building comes with hd tuner so just curious

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          • #6
            Computer with HD tuner will still output VGA and thats what the monitors take. Won't the TV signal be embedded in the OS?
            Carputer Progress:
            [!!'-------] 25%
            have to fabricate screen mount

            have to start over, lilliput died, 1st laptop broke, have to sell the 2nd one. damn

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            • #7
              Originally posted by mushupork5
              Computer with HD tuner will still output VGA and thats what the monitors take. Won't the TV signal be embedded in the OS?
              you are right about the os my bad,

              i appreciate it guys

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              • #8
                getting a cpacitive touch screen in 7" 15:9 aspect is damn near impossible. 3M would make me one but i needed to order a shed load! Moisture/humidity can also be a problem fromwhat i hear with capacitive but i would still liek to switch to them.

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                • #9
                  What the actual diference anyway?
                  Renault Megane...the OEM look

                  The Lost in Europe Ford Escort

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                  • #10
                    cpacitive work via a capcitive method and require a finger (slightly damp not dry - oo er missus - as they rely on conduction) or a special stylus and resisitive use a change in resistance when the overlay is pressed.

                    some info here: http://www.waspswitches.co.uk/

                    and on the 3m website.

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                    • #11
                      Originally posted by Cris
                      What the actual diference anyway?

                      Resistive Touch Screens: A small electrical current of 4-6 volts DC at less than 60 milliampsMa) is passed through the metallic-coated layers. When
                      pressure is applied to the surface, the separator dots allow the two charged surfaces to make contact. The
                      resultant signal is then sent to our controller which determines the exact point of contact and registers the
                      "touch" as a mouse would register a "click".

                      Capacitive Touch Screens: an all-glass touch screen with a transparent metallic conductive coating.An electrode pattern printed along the edges which distributes a low voltage field over the conductive layer. When a finger touches the screen and draws a minute amount of current to the point of contact, creating a voltage drop. The current flow from each corner is proportional to the distance to the touch point.
                      The X/Y location of the point of contact is calculated by the controller and transmitted to the computer.

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                      • #12
                        well lets just put it into carputer plain english for you.

                        vibration plays a key role in touchscreens especially resistive ones simply because when you touch them they change the resistance (which current changes aswell) and causes fluctuations in power distribution. When you mount a touchscreen that is resistive and you get lots of vibration then it is randomly making contact causing a spike in current. They are less reliable because of this however cheaper to manufacture.

                        hope that explains it.

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                        • #13
                          personally i think the big reliability problem is cheap overlays on the lilliputs and people pressing them when in cars and putting too much pressure on it - because of hitting bumps and not being able to give it their fullest attention.

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                          • #14
                            Thanks for the explinations guys.
                            Renault Megane...the OEM look

                            The Lost in Europe Ford Escort

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                            • #15
                              Originally posted by Cris
                              Thanks for the explinations guys.
                              no probs dumbass!



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