So I just realized that when my laptop is fully charged and plugged in, the image quality sucks?

It doesnt make sense to me. I had it plugged in to charge and seriously all these normally perfect quality photos (i even googled photography to be sure it wasnt just the image's quality) looked TERRIBLE. very matted and pasty. colors too bright, people literally looked like clowns. does this happen to you when you plug your laptop in for a while?