That could be done in hardware. They could put a double framebuffer in it, one that contains the frames of the input signal and another with what&#x27;s currently displayed, repeatedly diff&#x27;ing them to send the right signals to the display. The video linked in this comment <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10187876" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10187876</a> shows a Nook&#x27;s display being used for video, so I think it&#x27;s quite possible.