Problem:

Images on a display screen, such as a projector, LED display, or TV, are not fully displayed in photos of the screen.

Cause:

The images on a display screen are refreshed at a defined rate, which is extremely quick and imperceptible to the human eye. The shutter speed and exposure time of the phone camera is even faster than the screen refresh rate. As a result, the display image has not been refreshed completely when the shutter button is touched, resulting in the content in the photos only being partially displayed.