Re: 4.41 inch ePaper Display for the rPi

From	Martin Gregorie <martin@address-in-sig.invalid>
Newsgroups	comp.sys.raspberry-pi
Subject	Re: 4.41 inch ePaper Display for the rPi
Date	2015-06-18 22:39 +0000
Organization	A noiseless patient Spider
Message-ID	<mlvhb6$fi6$1@dont-email.me> (permalink)
References	<mluoqo$b9j$1@dont-email.me>

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On Thu, 18 Jun 2015 11:42:27 -0400, rickman wrote:

> There are a number of displays on the market for the Pi.  I need one
> that will work over a wide temperature range.  I would like to use an
> ePaper display, but there is very limited selection currently.  Between
> the size needed and the temperature range I find no existing ePaper
> product that will work.
> 
> I have found a couple of Kickstarter projects that seem to use the
> Aurora type of ePaper display which meets the temperature requirement,
> but they are only for the smaller displays, the largest being 2.7 inches
> I believe.  These controllers are not compatible with the larger size
> displays.
> 
> I have also found 4.3 inch displays in a different ePaper technology
> which won't meet the temperature requirements.
> 
> I am thinking about making a Pi oriented controller board for the 4.41
> inch size display.  The resolution is 400x300.  There is a controller
> chip that is promoted for the larger displays, but I haven't found
> documents explaining what it does.  I actually can't find any documents
> on exactly how to drive the larger displays other than using the eval
> controller module which uses the controller chip.  So clearly it will be
> a long row to hoe to try to get the info and design a board.
> 
> In essence, the difference between this display and others out there is
> the temperature range and the fact that the display size is not limited
> by the rPi size.  I'm wondering how much interest there might be in such
> a product if I make it.

Are any of these displays coloured ePaper? What about touch screen 
capabilities?  The 4.4" size  sounds useful for what I'd need: a display 
with low power consumption that is easily readable in direct sunlight. 
The space limitation is because that's as big as I can use in my glider 
without hiding other instruments. Touch screen would suit me better than 
a separate controller. I'd only need single touch.

I'm currently using a Medion S3747 with a transreflective screen. This  
remains readable in direct sunlight though its contrast does tend to 
reduce in very bright conditions. ePaper would be better despite its 
relatively low refresh rate. The software I run is available for both WM 
5/6 and Linux, so should work well any RPi.

-- 
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |

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Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-18 22:39 +0000
  Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-19 19:10 +0000
    Re: 4.41 inch ePaper Display for the rPi rickman <gnuarm@gmail.com> - 2015-06-19 15:34 -0400
      Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-19 20:36 +0000
        Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-19 23:22 +0000
        Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-19 23:58 +0000
          Re: 4.41 inch ePaper Display for the rPi hamilton <hamilton@nothere.com> - 2015-06-19 18:25 -0600
          Re: 4.41 inch ePaper Display for the rPi rickman <gnuarm@gmail.com> - 2015-06-19 22:44 -0400
            Re: 4.41 inch ePaper Display for the rPi rickman <gnuarm@gmail.com> - 2015-06-20 13:29 -0400
        Re: 4.41 inch ePaper Display for the rPi cl@isbd.net - 2015-07-29 10:26 +0100
          Re: 4.41 inch ePaper Display for the rPi cl@isbd.net - 2015-07-29 21:21 +0100
            Re: 4.41 inch ePaper Display for the rPi rickman <gnuarm@gmail.com> - 2015-07-29 17:18 -0400
              Re: 4.41 inch ePaper Display for the rPi cl@isbd.net - 2015-07-30 10:23 +0100
                Re: 4.41 inch ePaper Display for the rPi Rob <nomail@example.com> - 2015-07-30 11:14 +0000
                Re: 4.41 inch ePaper Display for the rPi Dom <domafp@blueyonder.co.uk> - 2015-07-30 12:55 +0100
                Re: 4.41 inch ePaper Display for the rPi cl@isbd.net - 2015-07-30 13:15 +0100
  Re: 4.41 inch ePaper Display for the rPi Theo Markettos <theom+news@chiark.greenend.org.uk> - 2015-06-19 20:27 +0100
    Re: 4.41 inch ePaper Display for the rPi rickman <gnuarm@gmail.com> - 2015-06-19 15:57 -0400
  Re: 4.41 inch ePaper Display for the rPi Martin Gregorie <martin@address-in-sig.invalid> - 2015-06-19 19:31 +0000

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