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LDC2114: LDC2114 or relative parts alternative for touch screen capability?

daisuke kawasaki
Expert 4545 points
Part Number: LDC2114

Hi expert,

My customer is looking into TI LDC parts especially LDC2114 touch on metal buttons for a display panel.

Is LDC2114 or relative LDC parts capable for a kind of touch volume "bar" slider or touch volume "dial" function on a display screen by a sort of plastic sheet with evaporated aluminum material as similar concept of capacitive touch?

If we could offer such a reference design or guidance, it would be highly appreciated.

Thank you and best regards,

Daisuke KAWASAKI

  • 0
    TI__Intellectual 2725 points

    Hello Kawasaki-san,

    The LDC2114 is the correct device for any inductive touch or metal touch applications. There are a few design guides in the product folder for the LDC2114 that will be helpful but the reference designs are still a few weeks from being available online. If your customer has any specific questions regarding the technology or how to implement it, please let us know.

    Regards,

    Varn,

  • 0 in reply to Varn Khanna
    TI__Expert 4545 points

    Hello Varn-san,

     

    Thank you for your advice.

    A plastic sheet with evaporated aluminum material would be an just idea as an optional.

    Since customer’s form fact will be thick metal plate, I am not sure how much enough bend they can obtain in case just touching on the surface as we describe in the paper of touch on metal application.

    Which guidance will be helpful for such a use case?

     

    Best regards,

    Daisuke KAWASAKI

  • 0 in reply to daisuke kawasaki
    TI__Intellectual 2725 points

    Hi Kawasaki-san,

    Apologies for the delay in getting back to you. The LDC_Tools spreadsheet has helpful spreadsheet that can calculate deflection for a given amount of force in different materials.

    In addition you refer to touch on metal user guide for addition guidance. Generally speaking we have supported <1 mm thick stainless steel metal plates in the past.

    Regards,

    Varn.

  • 0 in reply to Varn Khanna
    TI__Expert 4545 points
    Hello Varn-san,

    Thank you for your replay. Can we have a direct contact to identify what the best solution to approach? so We can share the application info.

    Thank you and best regards,
    Daisuke KAWASAKI