Samsung Display Patents an Under-Panel Light Sensing Stack for Screens

By Patentlyze Team · Updated May 16, 2026

Samsung Display is patenting a way to weave light-sensing elements directly into the dark gaps between pixels — no separate sensor cutout required. It's a structural approach to putting eyes inside the screen.

How Samsung hides light sensors inside the display itself

Imagine your phone's display not just showing you things, but also sensing the world through the screen itself — detecting a fingerprint, measuring ambient light, or tracking proximity — all without a notch, hole, or visible sensor window.

That's the core idea here. Samsung Display's patent describes a screen where the tiny dark gaps between the light-emitting pixels are used to house miniature light sensors. Instead of carving out space elsewhere on the device for sensors, the display does double duty.

The tricky part is making sure those sensors actually work — stray light from nearby pixels can wash out any reading. Samsung's answer is a carefully engineered stack of conductive and buffer layers beneath the sensors that physically blocks unwanted light before it reaches the sensing element. It's less a single invention and more a precise recipe for how to build this kind of panel without the sensors interfering with the display, or vice versa.

How Samsung's conductive layer stack blocks and captures light

The patent describes a display panel with three main layers: a substrate (the base), a circuit layer (the wiring and thin-film transistor stack), and an element layer (where the actual light-emitting and light-sensing components live).

The display area is divided into emission areas — the individual pixel sub-pixels that produce light — and a non-emission area, the dark space between them. The key innovation is that the patent carves out a display sensing area within that non-emission space, placing light sensing elements (photodetectors) there rather than wasting the real estate.

The circuit layer underneath is where the real structural engineering happens. It's built up in a specific sequence:

• Additional conductive layer — a base conductor on the substrate
• Additional buffer layer — an insulating film covering that conductor
• Light blocking conductive layer — a critical shield that prevents pixel light from leaking sideways into the sensor zones (think of it as a tiny light baffle)
• Buffer layer — another insulator on top of the shield
• First semiconductor layer — where the transistor logic for the sensors begins

The light blocking conductive layer is doing the most important work: it physically stops optical crosstalk (unwanted light spill from neighboring emitting pixels) from corrupting the sensor readings below.

What embedded display sensing means for future Samsung panels

For consumers, this kind of architecture is what enables under-display fingerprint sensors, ambient light detection, and proximity sensing without visible holes or punch-outs in the screen. The cleaner the implementation, the more of the front face can be pure display — and the more sensor functions can be packed in without hardware compromises.

For Samsung specifically, display sensing density is becoming a competitive axis. Rivals are racing toward the same goal — a screen that's also a sensor array. This patent doesn't reveal a finished product, but it does show Samsung Display is thinking carefully about how the layers are stacked, not just whether sensing is possible. That kind of materials-and-stack IP tends to be foundational to manufacturing real panels at scale.

Editorial commentary on a publicly published patent application. Not legal advice.