Name: In-Glass Fingerprint Reader TEARDOWN! - How does it work?!
Uploaded: 2020-03-06T20:04:09.000Z
Duration: 5 min 56 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Now the goal of this whole video is to open up the Vivo X20 Plus and see what that in-screen

fingerprint scanner looks like from the inside.

Transition words & phrases

Even though this phone survived my durability test, at the end the screen went black when

it got cracked over the top of the fingerprint scanner.

So now let's see how it's all put together and see what can be replaced.

There are two visible screws at the bottom of the Vivo X20, both of which are a T2 screw.

I'll link the toolkit I use, and any replacement parts I find in the video description like

Once those screws are out I'll slip my metal pry tool between the plastic edge of the screen

I've taken apart several other phones with a similar build to this, and it's held together

with a series of clasps around the outside.

So a few strategically placed pry tools should be able to pop the screen out of the back

Luckily, since my screen is already shattered, I don't have to worry too much about being

There is a little bit of adhesive holding the back to the front panel, but there's nothing

So I'll set it off to the side and start taking out the 3 screws holding down the large C

shaped bracket, and then I'll set that off to the side next to the screws to keep things

This phone is pretty complex inside, unfortunately.

I'll unclip the battery ribbon cable first, and then the button ribbon.

And then the charging port ribbon unsnaps like a little Lego, which is actually super

interesting because the mirco USB charging port is only held in place by two little screws

down here at the bottom, then the whole port comes out.

This is literally the easiest charging port replacement that I've ever seen.

There are two screws holding down one more silver bracket over the two extension ribbons

I'll fold those down gently, making sure not to kink anything.

And then grab the little green battery pull tab and remove it from the frame.

The 3900 milliamp power battery is actually pretty easy to remove and to replace compared

The motherboard has an incredibly small eccentric rotating mass vibration motor tucked over

You can see how it rotates and spins around on it's little motor.

I'll remove 4 more screws holding down the motherboard, and unclip one of the two main

camera ribbons over here on the side, just like a little Lego.

Same here with the earpiece resting in the center of the motherboard.

There are two wire cables, a white and a black, one on either side of the phone.

Then the motherboard can pull up and away from the phone body.

Looking at the motherboard we can get a close-up view at the SIM and SD card tray, along with

the dual camera set up – both 12 megapixel.

Vivo doesn't advertise OIS so this little movement in the lens might just be the focusing

Moseying our way down to the bottom of the phone to look for that in-screen fingerprint

I'll keep these organized by setting them on the table next to me arranged in the same

The black plastic pops off revealing the loud speaker and protective plastics.

And then all we have left attached to the phone is the extension ribbon for the headphone

Now, the screen is very permanently glued onto this metal frame, and by permanent, I

mean any attempt to remove the screen will end up breaking the display and the glass.

Luckily mine is already broken, so I don't have too much to worry about.

But it will all need to be removed in order for us to get a glimpse of how that fingerprint

I've been warming up the phone with a heat gun, getting it barely too hot to touch.

This softens the adhesive under the screen, allowing my thin metal pry tool to slip in

between the glass and the plastic edge, cutting through the soft adhesive.

The display has the fragility of a potato chip underneath that glass, so this definitely

And this is also why I only remove phone screens that are already completely broken when they're

Once my pry tool has cleared all the adhesive around the edges, the whole thing can pull

If I were to replace the screen right now, I would just clean up that frame and reuse

Finally, we get to see the backside of the display fingerprint scanner.

It's got a little latch style connector tying it into the screen ribbon cable.

I'll unlock that with my plastic pry tool and very carefully pull the fingerprint scanner

It's very lightly adhered to the slot that it's sitting in and it is pulling away with

some of the little bits of fragile AMOLED display attached to it.

You can see inside the slot, the screen has different layers.

The clear glass layer on the outside, and then that brownish display layer made up of

tiny LEDs that I compared to a fragile potato chip.

And then finally this little rectangular fingerprint scanner called the FS9500 made by a company

That little orange block in the center is the sensor that captures the image of your

fingerprint and turns it into an equation based off of the contrasting points of your

This sensor is designed to work pretty much covered and in close range, so it's not the

exact same as the colorful, normal camera sensor like the one we saw inside of the LG

Both of the cameras are designed for different tasks, but it's still interesting to see the

Let's take a closer look at the display panel since the fingerprint scanner essentially

takes a picture through the LEDs displaying the images you see with your eyes on the phone

The shards are semi-translucent and you can see light through the rectangle where the

The only reason the rest of the display is as black as it is, is because of this black

Without this black layer of tape, the rest of the panel becomes as translucent as the

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In-Glass Fingerprint Reader TEARDOWN! - How does it work?!

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