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Samsung · Display · Filed Feb 12, 2026 · USPTO published Jun 25, 2026 · Jun 25 release

New Display Patent Tackles Screen Flicker When Devices Slow Down to Save Battery

One of the trickiest problems in modern OLED screens is keeping the image stable when the display deliberately slows down to save power. Samsung's latest patent takes a close look at exactly how each pixel behaves during those quieter moments.

By · Updated · 3 min read

Samsung Display Patent: Low-Frequency Pixel Drive Circuit, figure from US 2026/0179569 A1
Figure from the official USPTO publication.
Publication number
US 2026/0179569 A1(US20260179569A1)
Applicant
Samsung Display Co., Ltd.
Filed · Published
Feb 12, 2026 · Jun 25, 2026
Inventors
Gyungsoon PARK, Sunhwa LEE, Hyunjoon KIM, Jaeyong JANG, Kyunghoon CHUNG
Status when we published
Waiting for an examiner
Document
20 claims
US classification
345/204
Parent application
Continuation of 19/017,187 (filed Jan 10, 2025)(19017187)

What Samsung's low-frequency pixel circuit actually does

Your phone's screen doesn't always run at full speed. When you're reading a static page or leaving your phone idle, the display can drop to a much slower refresh rate to save battery. The problem is that pixels need to hold their brightness steady during those longer gaps between updates, and that's harder than it sounds.

Samsung's patent describes a specific circuit design for each individual pixel that uses multiple transistors and two capacitors to keep the pixel lit correctly even when the screen isn't being refreshed as often. Think of it like a tiny rechargeable latch inside each dot of light: it holds its value between the moments when the screen checks in.

This kind of circuit-level work is the unglamorous backbone of the variable refresh rate displays you see on flagship phones and tablets. Getting it right means lower power draw without visible flickering or color shifts.

How the multi-transistor pixel holds its charge between scans

The patent describes a pixel circuit with five transistors, two capacitors, and a light-emitting diode (the actual light-producing element in an OLED screen).

The key idea is a two-phase scan approach. During one frame at a reduced driving frequency (meaning the screen is refreshing slower than its maximum rate), each pixel goes through:

  • One first scan period, where fresh image data is written from the data line via the second transistor.
  • One or more second scan periods, where a separate transistor (the third) connects the pixel's gate node to a reference voltage line, compensating for any electrical drift that has built up.

The two capacitors do the holding work. The first capacitor sits between the gate and the output terminal of the main driving transistor (the first transistor), locking in the brightness level. The second capacitor connects the output terminal to a voltage rail, helping stabilize the current that flows through the OLED.

A fifth control transistor (referenced in the claim as the fourth transistor) can cut or allow current to flow from a power supply line, effectively turning emission on and off in a controlled sequence. This timing separation between data-writing and light-emitting phases is standard in modern OLED pixel design and helps prevent unwanted light output during programming.

What this means for OLED battery life on phones and tablets

Variable refresh rate technology, where a screen runs at 1Hz while idle and jumps to 120Hz during scrolling, is now a standard selling point on premium phones and tablets. But the pixel circuits that make it work without visible artifacts are genuinely difficult to engineer, especially at the OLED level where each pixel drives its own current.

For you as a user, better low-frequency pixel circuits translate directly to longer battery life without the screen looking washed out or flickery when the refresh rate drops. Samsung Display supplies panels to Samsung's own Galaxy devices as well as other manufacturers, so improvements here have a wide reach across the Android ecosystem and potentially beyond.

Source: US 2026/0179569 A1 at the USPTO (PDF). Full patent text and figures are in the official publication.

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