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How does the digitizer work?

Hi, this is a generic question about digitzers. From what I see on all the guides, you have an LCD screen connected to the phone, that does nothing but display an image, right?

And the on top of that you have a digitizer that is only a piece of glass (say, like this for example). This one is supposed to monitor touching i'm guessing.

But HOW?! There is no connector. This really just looks like a piece of protective glass.

What am I getting wrong ?

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Usually, the glass is called front glass or touch panel but not the digitizer. The real digitizer is the one between the front glass and LCD, which also is crystal colored and with the flex cable. You can see the picture, one is the front glass with digitizer and the other is the front glass only.

Block Image

And nowadays, the glass, the digitizer and the LCD are integrated all together with professional machine. That's why it's more and more difficult to replace the glass or LCD only.

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But if everything works fine on the touch & lcd, but the glass is broken, then my "unconnected glass" is fine for a repair, right?

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Yes, you can replace the glass only. For example https://www.youtube.com/watch?v=S_BadHtL...

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Check this out: How the iPhone screen works

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