Electronic photo frame is also called digital photo frame, and the main working principle is to replace the photo part into LED display screen, install power supply and storage medium. Then it can play digital photos.

There are three core parts in digital photo frame: processor, semiconductor memory and LCD display unit.

Digital photo frame is composed od three parts: LCD, PCB circuit board and frame. LCD can be either analogue or digital, and they have different sizes. PCB circuit board is the core of digital photo frame, because it includes the essential softwares. To the initial customers, frame is an important standard. The material of frame is usually plastic or wood, and some digital photo frames provide removable frames.