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newguy
Joined: 24 Jun 2004 Posts: 1903
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OT: low power graphical LCD? |
Posted: Fri Sep 01, 2017 7:11 am |
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Has anyone found a very low power graphical LCD? I have a couple of these on the way: http://www.orientlcd.com/JAZZ_BC_W_Graphic_128x64_COG_LCD_Module_p/jazz-bc-w.htm, and their current draw is supposed to be "about" 80uA.
I also have a couple of MIP (memory in pixel) displays from Japan Display: http://www.j-display.com/english/product/reflective.html. I have yet to design a board to be able to interface to these, but they are supposed to be ~2uA draw for a static image (no backlight of course). Drawback with these types of display is that you can't address an individual display byte - you can only write an entire display line. Current draw during an update cycle is higher, and, all things considered, the slow update will probably put the battery drain budget for a display of this type close to something like a conventional graphical LCD.
Has anyone dealt with a small(ish) graphical LCD that is low power? May I ask what manufacturer/model/typical static & refresh current draw? |
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Ttelmah
Joined: 11 Mar 2010 Posts: 19359
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Posted: Fri Sep 01, 2017 8:36 am |
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Look at the EA W128W-6X8HEW.
Can use SPI, or a parallel bus mode. Neat thing is that even in SPI mode you can read the display RAM (many SPI interface LCD's don't allow this), so you can genuinely do graphics without having to have a RAM buffer for the whole display. However update is slow like this. I used the standard graphics library routines, just with SPI routines added, and it worked fine. |
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