The record first. On August 11, 2020, LG Display Co., Ltd. was granted US10741621B2, "Display device with a fingerprint sensor" (CPC including H01L 27/3234 and H04M 1/0266). Named inventors include Kyoseop Choo and Buyeol Lee. The document describes building the fingerprint sensor into the panel rather than bolting it on, which is the enabling step for an uninterrupted front face.
Follow the segment line for a panel maker. Display suppliers compete to sell the highest-value module, and integration is where the value concentrates. A panel that arrives with sensing built in commands a richer price than a bare display, and it locks the handset maker into the supplier's stack. The patent is the fence around that integration value — the reason a customer pays for the module instead of sourcing the sensor separately.
The aesthetic is a spec. Consumers and reviewers reward the all-screen front; handset makers therefore demand it from suppliers. That demand flows upstream into panel-maker R&D, and the in-panel fingerprint grant is a datable marker of LG Display answering it. The business point is that the supplier captures the value of a trend the handset maker advertises.
Comparability discipline applies. "Under-display fingerprint" spans optical, ultrasonic, and capacitive approaches with very different cost and supplier structures. The filing pins this claim to a specific panel-integration method, which matters when comparing which supplier owns which approach — a distinction a spec sheet erases.
What the document does not disclose is the economics. It is a device structure, not a contract. It will not tell you module ASPs, design wins, or margin. The grant establishes a defensible integration position; the revenue it earns is undisclosed.
For investors, the throughline is this: in the device economy, panel suppliers monetize aesthetics, and the patent record shows which of them owns the integration that turns a design trend into a billable module.