Displaying a single pixel on LED display showed two LEDs lit up

Processing
1

In my processing program, I am setting just a single pixel to red, however on my LED screen, two LED lights lit up red, with one dimmer than the other. How can I make sure that only 1 LED light lights up?

I have set the processing P2D canvas to exactly the same size as the external display (at least i think the external display is indeed 2468 * 64). Therefore I think that 1 pixel in processing should correspond to 1 led light on the screen. But this is clearly not the case now.

Thanks in advance.

2

This might be because smooth() is on by default.

Try adding noSmooth() to setup() and see if that helps.

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3

thanks, but i found that my LED display was actually not displaying at the resolution I thought it was.

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