I cracked my screen and thought for sure something inside of my iPhone XR was broke, but the tech came to my apartment and 30 minutes later, my phone was back to new.
It got me wondering, how does the screen really work? Is the picture in the glass itself and that’s why it can just be replaced and back to normal? Is there something behind that glass that had to be replaced too? Where the hell does the picture even come from.
Sorry if I’m asking too many questions but I’m so intrigued after my screen was literally cracked and there were black spots and green and black lines all over it, and just by replacing the glass it’s back to normal.
In: Technology
The phone screen consists of a bunch of components that are all stacked and glued together.
On the outer most layer you obviously have the glass that keeps things feeling nice. Behind that glass you have the digitizer which is what handles the touchscreen part, and the OLED or LCD display. All of these are stacked and adhered together so “replacing the screen” is swapping out all of these parts.
[This Samsung page has a nice image showing how LCD screens are built up and all the layers used to create the image](https://pid.samsungdisplay.com/en/learning-center/blog/lcd-structure). In an OLED phone everything from the color filter back is replaced by the [OLED assembly](https://www.oled-info.com/files/OLED-device-structure-img_assist-400×295.jpg) which doesn’t need the back reflector or light guides because an OLED produces the light rather than filtering the light
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