Bezel-less smartphones have been the trend for the past two years. However, the display notch become buzzword of display technology after apple introduced its iPhone X.
The entire notch exists because Apple is introducing Face ID with the iPhone X, a replacement for Touch ID that uses infrared cameras to scan your face and log you into your phone.
In a world where notches continue to flood the flagship smartphone market, manufacturers are trying their best to achieve an edge-to-edge screen with notch reduced to the smallest size, but the aim to get rid of the notch remains.
Bezels are fast becoming an endangered species as manufacturers try to find ways to shift elements from the front face of our phones. Navigation buttons have crept onto the screen, the fingerprint sensor has moved to the back, and speakers have slipped to the bottom edge or been shrunk down.
The up coming trend is
a truly all-screen design with no notch
So, where do they put the camera, speaker?
1 . Pop-up selfie camera
Vivo’s Apex concept phone has a motorised front-facing camera that rises above the phone body when you go to mug for your selfie.
Similarly, a Chinese android phone maker you’ve never heard of called Doogee, is actively working on other ways to achieve an all-screen design without copying Apple’s notch using screen-sliding mechanism for front-facing camera.
2. A camera hidden right behind the pixels
Tech giants have filled patent for hiding things like the earpiece speaker, the light sensor, the front-facing camera and Face ID.
Sooo… how do you hide a camera behind a screen? First you have an OLED screen created to be transparent when switched off. Then you back this with some window tinting. Put a small camera behind the tinting, hidden from view. Now, set up the display screen to refresh the image in a way that leaves a fraction of a second per frame that is entirely blank. Finally, synchronise the camera to capture the image when screen turns off .
3. Vibrating audio
OLED panels vibrate to create the sound for your videos, calls and gaming called sound-conduction techniques, which uses a fancy-sounding “cantilever ceramic piezoelectric actuator” to deliver sound.
“Sound on display/Crystal Sound OLED” removes the speaker at the top of the smart phone. Instead, it has a piezo electric actuator at the back of the panel that can turn the electrical signal into vibration. This is the mechanism by which the actuator vibrates the OLED panel, so you can hear the sound directly from the screen.