[Arm-netbook] Interchangeable screen

[GaCuest]

En 17 de septiembre de 2015 en 1:07:53, Luke Kenneth Casson Leighton (lkcl at lkcl.net) escrito:
> On Wed, Sep 16, 2015 at 1:41 PM, GaCuest wrote:
> > Well, we are designing a handheld games console based on EOMA-68.
> 
> yay! (and yes, paul, this one:
> http://rhombus-tech.net/community_ideas/games_console/ )
> 
> > We have thought about doing an interchangeable screen. Users can buy the handheld games 
> console without a display (more cheaper, users can use the HDMI of EOMA-68), with a 480p 
> display or 720p display (more expensive) and upgrade it in a future. We would connect 
> the TFT and touch screen connector on a PCB, and user may connect it with a connector to 
> the base PCB.
> >
> > We have thought about use neodymium magnet (some of 2x1 mm of them) to connect the case 
> of the display+touch panel with the case of handheld games console. But we have some doubts 
> about how to connect both PCB.
> >
> > We've thought use a slim B2B connector like this: http://www.literature.molex.com/SQLImages/kelmscott/Molex/PDF_Images/987651-2331.PDF 
> >
> > The problem is that slim B2B connector have slow mating cycles (about 30-50 times). 
> Any can help us about a better way to connect it?
> 
> honestly, i don't recommend letting users consider it to be an
> "end-user arbitrarily replaceable" component, but more of an "end user
> *serviceable*" part i.e. they definitely definitely need some sort of
> technical skill.
> 
> encouraging that view by requiring that they use a screwdriver or
> other tool to get at the screen would, i feel, be something that you
> should deliberately push users towards so that they feel uncomfortable
> unless they are confident with tools and ESD precautions.
> 
> if the screen could be packaged in a small self-contained unit that
> had absolutely no chance of physical damage, where it was possible to
> "slot in" to a special set of guide rails where there was absolutely
> no chance that the end user could possibly get it wrong, then i would
> say "go for it".
> 
> however i think you'd agree that doing so hugely complicates the
> casework design and leaves you with a lot more to consider right now.
> 
> my advice to you therefore would be to use an FPC cable at either end
> and to have the LCD module screwed down, deliberately so that it's
> clear that this is *absolutely not* something that you should expect a
> 3-year-old or a 90-year-old infirm and elderly non-technical person to
> be able to handle.
> 
> once you have a first revision out the door, and have some cashflow,
> by all means come back to the end-user removable LCD concept, but
> right now i think you're asking too much.

Yes, obviously change the display would be for more advanced users. We would sell the console in 3 packs (without display, with 480p display, and with 720p display). And in the future, the user can update the display itself (or send the console and we update it).

However, although change the screen would be for users with more knowledge, we want to make it as simple as possible, and perhaps using FPC cables and screws complicates it too.

Thanks.