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Carl Fredrik Ahl

Why Under-Display Fingerprint Sensors Require OLED?

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It's not quite true to say that under-display fingerprint requires OLED screens, it's just that the current sensor used (Synaptic Clear ID) only works on OLED. It works by effectively bouncing light off of your finger and analysing the light reflected through the gap between the OLEDs. It's not the only technology, Samsung (known for their OLED screens) has a tech patented that works using ultrasonic detection of the ridges and grooves in your finger, and theoretically doesn't require a certain type of screen as long as the screen used allows the waves to pass through effectively, but we can't test that because the phones that will have this new tech will all come with OLED screens. 

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26 minutes ago, 0&1 said:

Hi,

I've heard that under-display fingerprint sensors require OLED panels. Why is this?

OLED's can be transparent/partially-transparent allowing light to be passed through from a sensor and are also much thinner than LCD. 

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Posted · Original PosterOP
15 hours ago, FlappyBoobs said:

It's not quite true to say that under-display fingerprint requires OLED screens, it's just that the current sensor used (Synaptic Clear ID) only works on OLED. It works by effectively bouncing light off of your finger and analysing the light reflected through the gap between the OLEDs. It's not the only technology, Samsung (known for their OLED screens) has a tech patented that works using ultrasonic detection of the ridges and grooves in your finger, and theoretically doesn't require a certain type of screen as long as the screen used allows the waves to pass through effectively, but we can't test that because the phones that will have this new tech will all come with OLED screens. 

Okey thx for the answer. I know how Synaptic Clear ID work, but why can't the light go through all types of screen panels?

 

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