How to connect a LCD to STM32 through long distance(2 meters)

[snkparty1]

We are developing a user interface by using STM32H743 + SDRAM + LTDC + DMA2D and connecting to LCD through an FPC cable, which is only 30 CM long. It works fine.

But there is one problem, in some of our products, the LCD can be placed at a position that is 2 meters away from the control board. So I brought a 2-meter-long FPC cable, and the test result was quite bad. Images on LCD became quite unstable and the touch function totally broke down...

Is there any solution for this problem?

[CYANG.1]

Hi,

I think it is hard to ask a control microcontroller chip to have enough strength to support a LCD at so far place. If thus condition is happened,  relay chips in the middle of cables are needed.

B.R.

[Ozone]

That won't work.

Even for a proper cable with reasonable well adapted wave impedance, attenuation is proportional to length.
The very same reason why obtainable baudrates on RS232, CAN or SPI nets get lower the longer the cables become.