HP ENVY Touchscreen: USB device

usb

I'm building a DIY tablet with Orange Pi & A20 SoC (maybe I will change for LeMaker Bass) & Android 4.2.2 (v.5 with Bass).
This is a 17.3' screen tablet. I already have a IPS screen, and all works, 4h30 autonomy

Anyway, now I'm looking for a cheap but quality solution for a touch screen. So, multitouch, and easy interface: USB is the better choice for me.

I have seen the "HP ENVY TouchSmart 17 t" touch screen. The others touch screen are about 180$, because not a serial manufacturing…
Here a pic of the PCB:

enter image description here

It seems that the chip is eGalax (so no problem for the driver: /drivers/input/touchscreen/usbtouchscreen.c), and the interface looks USB (CN1 ref VDD, D+, D-, Ground).

But, because of norms of USB which is VDD, D-, D+, Ground:

Here, D+ and D- are inversed… It distrub me a little.

So, my question: Does somebody can confirm this is really an USB device ?

Thanks

Edit: Here a second pic, but the PCB is a little different:

enter image description here

Best Answer

Some good news, after receive the touch panel (I had to try!)

The chip is Egalax 7920-SG11: enter image description here

The internal connector is very very small, (4mm x 2mm), so I had to found another solution to plug the device. Hopefully, I have found !

There are some plots on the pcb, they are indicated: (thanks HP !)

enter image description here

So, I have soldered an old laptop screen cable (need small wires, each plot is 1 mm diameter) to each point, after checking each connection with a multimeter.

enter image description here

Then, the following is not hard. Here the result, and the Windows detection :)

enter image description here enter image description here

Now, let's go on Linux and Android, the final destination. But it's another story...

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