LCD question

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#1
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Hi,

is there anyone who understands german and could have a look at the datasheet here? I don't really get how that display can have up to 512 colors when it states that each scanline consists of 2400 subpixels for 800 pixels width ... To me that means every pixel has 3 subpixels (RGB). But the interface has 8 Bit and it is said that you have to send 300 "packages" to the display. So that would mean every subpixel is consisting of just 1 Bit per R/G/B color -> 8 colors and not 512.

I would be really thankful if anyone could help me with that issue.

Regards,
Alloc

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Your statement is correct that one pixel consists of three subpixels (R/G/B) and has one Bit per color resulting in 8 colors. To generate more colors the subpixels are not litt in every picture that is send to the display. So you can control the brightness in the pixel.
->Helligkeitsstufen werden dargestellt, indem manche Bildinhalte nur bei jedem 2., 3., etc. Mal ausgegeben werden.
By doing this you can get up to 512 colors as the datasheet states.

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Hi,

thx for your reply =)
So I assume I can't "directly" use that LCD with the LCDC and Linux? Do you (or anyone else of course ;) ) know any place where I can get a LCD that can be used and which is not too expensive? (vendor from germany if possible ;) ).

Alloc

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Alloc86 wrote:
So I assume I can't "directly" use that LCD with the LCDC and Linux?
Depends how you go about lighting sub-pixels (or not) but yes, I assume you can't use it directly too.
Alloc86 wrote:
Do you (or anyone else of course Wink ) know any place where I can get a LCD that can be used and which is not too expensive? (vendor from germany if possible Wink ).
We scrapped a bunch of Nokia Communicator phones for their LCD, though that turned out to be a bastard of a thing as we couldn't get docco so had to reverse engineer all the timing data and control sequences. Not recommended.

Small quantitiy LCDs tend to be a bit of a tricky issue. The best thing I've found is to get in touch with a few of your distributors who sell LCDs (here in Aus we use Glyn, Soanar, Braemac etc) and ask them whether they have any broken packs in their warehouse from previous orders etc. That way you might not get exactly the LCD you're after but at least you'll get quantities <1k!

The other way to do it is to find some likely-looking part numbers and hit the gray market (hkinventory.com etc). Or get a sourcing agent to do it for you, here in Aus Braemac are good at sourcing parts on the gray market.

-S.