It makes the first impression on the user as per its resolution. So, we can say that a good quality digital photo frame also has a high-resolution display unit. Most of them are LCD (Liquid Crystal Diode) type. This type of display is thin enough that the digital frame is not much thicker than an ordinary photo frame.
Central Processing Unit in a Digital Photo Frame is similar to an electronic handheld game. As we know this gadget performs some predefined intensive tasks like downloading the image from our integrated user account by using the internet, scrolling images, etc. The rest of the time, it does normal functions like synchronizing hardware units.
This gadget also has some Read-Only Memory (ROM) to store the Operating System (OS) to perform their operations. It also has some Flash Memory to store the running configuration, photos, and some small-sized operating software. Both types of memory are persistent, it means that no data is lost if the gadget is unplugged.
Not all but some of the Digital photo frames are working to an advanced level. And they are using a control board to hold a particular operating system to perform more tasks by using this display device. And a common Digital photo frame contains an OS to execute its limited functions.