What does progressive scanning do in video displays?

Progressive scanning in video displays involves drawing the video image in a sequence of lines from top to bottom. This method enhances the viewing experience by displaying the entire image at once, effectively increasing the perceived resolution and providing smoother motion for moving images. By scanning progressively, each frame is filled line by line rather than alternating lines as in interlaced scanning, which can lead to flickering and lower quality during fast action.

In progressive scanning, the display refreshes all lines in each frame, which is particularly beneficial for video content, providing a clearer and more stable picture. This is why many modern video formats, such as those used in high-definition televisions and computer monitors, favor progressive scanning over interlaced methods. It results in less flicker and a more detailed representation of fast-moving content, making it the preferred choice for many applications.