nexus 7 lcd touch screen digitizer panel factory

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I have a couple of Nexus 7 screens with broken digitizers, the LCDs work fine (just the screens, the N7s have been repaired with new screen assemblies).

Has anybody any ideas on if it is possible to hook up these screens to use in display only mode with the raspi, otherwise they will just end up in landfill (which I would like to avoid if feasible).

BobRocket wrote:I have a couple of Nexus 7 screens with broken digitizers, the LCDs work fine (just the screens, the N7s have been repaired with new screen assemblies).

Has anybody any ideas on if it is possible to hook up these screens to use in display only mode with the raspi, otherwise they will just end up in landfill (which I would like to avoid if feasible).

- 1st model the older a.k.a. 2012 - this one is equipped in lcd part number 070WP03S - 1280x800px . Nexus 7 2012 have Nvidia Tegra 3 CPU and according to Nvidia tech spec, Tegra3 have MIPI-DSI interface...

If it is this display http://www.panelook.com/CLAA070WP03_CPT ... 15772.html then the spec is i.e. here (in case you have no panellook account) http://www.dragonwake.com/download/exyn ... WP03XG.pdf (but I don"t know if this is the same rev/version as the screen in the NEXUS).

Conclusion: with the right LVDS adapter board and a suitable cable adapter it should be possible to use this display with RPi. Developing an LVDS adapter is no "rocket science": viewtopic.php?f=45&t=157109

As for N7 2013 lcd, it have 31pin connector too, and the beginning of signals might have very likely that same layout as lcd for N7-2012, only last 6 signals are the question, 3 of them will be backlight power for sure (there are 2 thick tracks on FPC cable)...

I will design a small adapter PCB either for use with the original Nexus LVDS cable or go for a 31pin FFC to 2.xxmm adapter. The rest looks trivial to me when looking at the modules data sheet. Too bad that the digitizer will be just a cover lens later since its not possible to get this working without having details on it.

But ELAN don"t have any info about them on www. Driver code for linux for those ELANs is available so there shouldn"t be much trouble to port them to Pi kernel (or even just enable... - I didn"t check it - this is just assumption...). I know they works on I2C - just checked on my N7 2013:

The displays have FFC connector so we need also FPC. Generic "straight" cable cost as much as display itself (bare display without touch panel, on aliexpress: ~$14). 3-4 times cheaper are "original" FPC cables with FPC contacts and Board-to-Board connector. I tried to identify the board-to-board connector (Mezzanine connector) part number. I measured both: socket (receptacle - I"ll call it `socket`

Whilst I was clearing out I came across another 2 cheapo tablets, one I managed to resurrect by resoldering the power connector the other has a cracked digitiser (a common feature), the display is an AT07QTN93 so that one should work quite easily, the digitiser is not welded to the display like the nexus"s so it might make a good smart mirror display.

Whilst I was clearing out I came across another 2 cheapo tablets, one I managed to resurrect by resoldering the power connector the other has a cracked digitiser (a common feature), the display is an AT07QTN93 so that one should work quite easily, the digitiser is not welded to the display like the nexus"s so it might make a good smart mirror display.

AT070TN93 is a 800x480pixel module from Innolux with 24-bit RGB interface --> can be connected to the RPi GPIO directly with a suitable adapter PCB (50pin FFC to 2.54pin pinheader). This is what I"m doing here i.e. viewtopic.php?f=41&t=154571 - no "glue logic" required. But you will have to design a custom board for this screen!

BobRocket wrote:don"t know if this helps, 1st gen ME370T board layout with touch connector on p29, con5 on p23 looks like it might be the LCD connector.

aBUGSworstnightmare wrote:BobRocket wrote:don"t know if this helps, 1st gen ME370T board layout with touch connector on p29, con5 on p23 looks like it might be the LCD connector.

AS for N7 2013 - this not help much, I checked other Panasonics connectors but none fit what I measured... Anyway I"ve ordered one LCD fpc for N7 2012 and 2013 , also I ordered 5pcs (for 3,22USD with cheapest shipping) the AXT530124 from aliexpress too, so around December they should arrive

Why did I choose a DF14 series connector? Simply due to the fact that quite affordable interface cables are available for this type of connector (http://www.banggood.com/20Pin-DF14-20-2 ... 77748.html) which I can use with my LVDS add-on board.

I have added to my google-drive-share a FPC directory with few more zoomed photos of FPC ribbons and calc (excel) file with connections on FPC from LCD to PCB connector. (Link: https://drive.google.com/drive/folders/ ... jNtbnhkcTA )

Let"s take the Nexus 7 as an example. Colour depth on the Gen1 display (the one that I have on hands) is 6-bit, that"s why it has 3 differential signal pairs for data Y0 to Y2 (Y0 is the upper channel in the mapping charts and Y3 is the lower one).

Single- or dual pixel is (let"s say most of the time, there are exceptions to this as well) related with the displays resolution: single pixel (channel) LVDS is possible up to HD (1366x768) pixel.

I have added to my google-drive-share a FPC directory with few more zoomed photos of FPC ribbons and calc (excel) file with connections on FPC from LCD to PCB connector. (Link: https://drive.google.com/drive/folders/ ... jNtbnhkcTA )