Walk the independent claim. LG Display's grant US10613677B2, "Touchscreen device with integrated fingerprint sensor" (issued April 7, 2020; inventors Jiho Cho, Kyoseop Choo, Manhyeop Han), is a granted patent. Its three-way classification — G06F 3/0416, G06F 3/044, and G06K 9/0002 — tells you immediately that it sits at the junction of touch input and biometric sensing.
The operative limitation is co-location. A phone could carry a touchscreen and a separate fingerprint reader; the claim's contribution is making one stack do both. That is hard because the optimal electrode geometry, drive frequency, and signal processing for capacitive touch differ from what fingerprint ridge imaging needs — reconciling them in a shared layer is the defensible engineering.
What it reads on is the full-screen-display phone, the form factor that eliminated the bezel and the physical fingerprint button by pushing biometric sensing into the display area. The claim covers the structural integration that makes that possible, which is why a display manufacturer rather than a phone brand holds it.
Scope discipline: the claim protects the recited integrated structure, not the broad idea of fingerprint authentication on a phone. A competitor using a discrete optical sensor module beneath the panel — a genuinely different architecture — may not read on this co-location claim. The element that matters is the shared-layer integration.
Granted status makes this enforceable rather than aspirational. For anyone designing an in-display sensor, US10613677B2 is prior art and a potential obstacle in one document, and the analysis should focus on whether their stack co-locates touch and fingerprint sensing the way the claim recites.
The portfolio context is the same one visible across LG Display's 2020 filings: a display maker capturing the sensing function inside the panel. This grant is the touchscreen-side companion to its OLED-side fingerprint family, and together they map a coherent integration thesis.