Reportedly, Samsung will soon use its audiocasting display technology called “Sound on Display”, both on the Galaxy Note 10 and, on the Galaxy, S11, to shave the upper frame even more than what is on the Galaxy S10+ (which is not much to start with).
The starting rumor was that it will appear in Note 10, but when looking at the renders, it has a small earpiece/speaker slot in the upper frame, so you can save an audio transmission screen for a great redesign of the Galaxy S11.
LG has a similar tech called Crystal Sound which has already pioneered in the LG G8, Sony has also had its acoustic surface for a while on TVs and Huawei has only used its acoustic screen technology in the P30 Pro.
In fact, as soon as last year’s MWC fair in February, we were able to play a little with the Vivo APEX concept which later became the Vivo NEX retail phone and, while its characteristic at that time was the finger scanning that worked in half screen, Screen SoundCasting technology was also present.
Here it is in the retail NEX, in the part of a small actuator attached to the back of the OLED panel, which sends its electromagnetic pulses directly to the panel that corrugates the air on it to transmit sound vibrations to the eardrum.
About Sound On Display
An interesting concept of Samsung’s sound emission display caught our attention when it was presented at last year’s Society of Information Display (SID). The Samsung representative explains how a panel that uses bone vibration and conduction can negate the need for a hearing aid, which helps extend the screen from top to bottom.
They had a prototype of the “Sound on Display” technology at their fingertips, which runs on what appears to be a Galaxy S9 + case, and the presenter joked that we’re actually looking at the Galaxy S10 display. It never happened, but we keep high hopes for S11.
Watch the video:
Both Samsung and LG have already sold their OLED screens that emit sounds on phones, the G8 and the Galaxy A60.
The transmission bandwidth is said to be in the range of 100 ~ 8000 Hz and, thanks to very fine vibrations, you would hear the sound only if you placed the ear in a fairly large area in the upper half of the screen, indicated with A circular symbol here.
How Does It Work?
First of all, an OLED screen is needed to position the small actuators. The LCD panels have an additional backlight layer that is not able to transfer the tiny electromagnetic vibrations that the exciter pumps through the screens, using the upper layers as a speaker diaphragm.
When we talk about speakers, you’re probably imagining those cone-shaped diaphragms that are on a magnetic space between them and the voice coils. However, the diaphragms have no cone shape, the pure nature of the vibrations produces an airwave effect sufficient to emit sounds, and that is exactly what those small actuators behind the G8 or P30 Pro display should do.
The P30 Pro actually has two circulars that look like watch batteries: the biggest one for transmitting the conversation from the top of the screen where there would be an earpiece and the smallest to vibrate in notifications and a pretty smart setup.
Samsung’s Sound on Display technology works in a similar way: one or two small actuators behind the AMOLED displays. The Galaxy A60 / M40 are those in which this Samsung technology was used for the first time, and this, together with its drilling designs, makes them get an “all screen” front similar to their much more expensive ones in the Galaxy family.
However, Samsung does not advertise it and only says screen sound technology and with good reason. They have speakers inside and the small screen exciter motors vibrate the top of the screen only during voice calls. It remains to be seen if this will happen in the next Galaxy Note 10.
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