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Topic: 30 Pin LVDS LCD (Read 3962 times) previous topic - next topic

Mass1323

Recently I disassembled an old HP laptop and decided to try and use the LCD screen as a touch screen monitor.  The only thing is that the connection between the screen and the motherboard is something I have never seen before and I'm having some trouble figuring out how to control the LCD screen without the motherboard connection (i.e with an arduino), if that's even possible.  I would imagine that I would need some kind of driver or controller IC to make it all work? Anyway the datasheet for the LCD monitor is here (the pin layout is on page 19): http://www.beyondinfinite.com/lcd/Library/Auo/B170PW06_V2.pdf
Thanks
-John

Tom Carpenter

~Tom~

Mass1323


BulletMagnet83

It's not possible to use LVDS screens directly with the microcontrollers we often play with... however, there has recently been a post on hackaday about an FPGA-based module which would allow such a thing.

Tom Carpenter

#4
Oct 05, 2012, 11:01 pm Last Edit: Oct 05, 2012, 11:09 pm by Tom Carpenter Reason: 1
The arduino is simply not powerful enough to interface with such a screen. You would need a lot of seperate hardware to run the screen and act as a frame buffer.
It is possible to get boards which allow laptop screens to be connected to via VGA in which case you could get a low resolution B&W image using the timer modules, but really an Arduino is simply too slow for such a screen to get any decent resolution/colour.

Just as an example of how much data there is:

A standard 17" laptop screen has a resolution 1440 x 900 = 1296000 pixels per frame
At a standard 24bits per pixel that yeilds: 31104000 bits per frame
A normal LCD refresh rate of a laptop screen is around 75Hz = 2332800000 bits per second = 2.17 Gbit/s = 278MB/s
An arduino has a clock rate of 16MHz, so that means the ideal data rate for the screen is 2.17G/16M = 145.8 times faster than the Arduino clock.


~Tom~

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