[KwartzLab] Laser-cuttable "screen protector" material for capacitive touchscreens?

[Bob DeGregory]

Well your target device appears to use a Gorilla Glass sandwiched LCD panel.

http://en.wikipedia.org/wiki/List_of_devices_with_Gorilla_Glass

 I can't say for sure, but probably the sandwich cannot be "opened" as one
might hope. See Nexus 7 teardown below.
http://www.ifixit.com/Teardown/Nexus+7+Teardown/9623/3

FWIW, if you were to have a barebones LCD panel (and some $$ to burn),
apparently you can buy Gorilla Glass in .5mm - 2mm thickness.  See:
http://www.diybookscanner.org/forum/viewtopic.php?f=1&t=440

Perhaps you could even use a second layer of Gorilla Glass, but the fact
that OEM bonds the "protective" layer to the "functional" layer is
suggestive that you might need to as well.

Corning has plenty of info on Gorilla Glass. For example:
http://www.corninggorillaglass.com/sites/all/files/GG2%20PI%20Sheet%20Rev%20b_050912.pdf

 I'm not completely comprehending the design you have in mind, but some
folks like to "protect" their scratch-resistant glass with a (replaceable)
plastic film. For this application 3M are the people to see:

http://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu7zK1fslxtUOY_Blxm9ev7qe17zHvTSevTSeSSSSSS--&fn=TransCondBrochure.pdf


Finally, what ever material you choose you're either gonna need to test it
for laser cutting, or you're gonna need to get OEM to advise you on the
matter.


On Thu, Nov 1, 2012 at 12:01 PM, JR Nelson <jrnelson at studiojrn.com> wrote:

> How thin are you willing to have this material be? Any number of plastics
> would still let the capacitive screen register touch; it's when you get too
> thick that you start having issues.
>
>
> On Thu, Nov 1, 2012 at 11:55 AM, Darcy Casselman <dscassel at gmail.com>wrote:
>
>> I'm still toying with whether this is a workable idea at all.
>>
>> But right now I'm toying with the idea of getting a Nexus 10, stuffing
>> it behind a sheet of this hypothetical material that I've got to fit
>> inside a larger enclosure.
>>
>> Darcy.
>>
>> On Thu, Nov 1, 2012 at 11:34 AM, Bob DeGregory <bob.degregory at gmail.com>
>> wrote:
>> > Darcy,
>> >
>> > Capacitive touchscreen actually covers a number of design approaches at
>> the
>> > component level
>> >
>> > Do you have a specific component or integrated assembly in mind?
>> >
>> > You can purchase material which claims to work as protection (primarily
>> > scratch protection) for touch screens in a variety of sizes and "device"
>> > compatability, but the engineering parameters involved in answering your
>> > specific question cannot be accurately determined from the information
>> at
>> > hand.
>> >
>> > On Thu, Nov 1, 2012 at 10:30 AM, Darcy Casselman <dscassel at gmail.com>
>> wrote:
>> >>
>> >> Is there such a thing? I want to build a seamless frame for a
>> >> touchscreen device.
>> >>
>> >> Can I put a sheet of material (that I've cut on the laser) over a
>> >> touchscreen and still have the touchscreen work?
>> >>
>> >> Darcy.
>> >>
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