Samsung's 120Hz mobile displays use variable refresh rates to save power

Ruben Fields
August 13, 2020

This technology brings a "remarkable power-saving" capability on mobile devices. Samsung aims to alleviate this drawback with its VRR display technology. "This will free up time for other smartphone operations", Lee added.

If we look back to when screens with high refresh rates first started to appear in phones, OnePlus was the first phone maker to put a 90Hz OLED display in a retail device (which followed the 90Hz LCD screen in the original Razer Phone), but Samsung Display was the company responsible for making the panel used in the OnePlus 7 Pro.

Some of the current generation high-end smartphones do offer the ability to switch between different refresh rates. Although it doesn't detail the backplane technology in use on the Galaxy Note 20 Ultra 5G, reports are that it's the LTPO (Low-Temperature Polycrystalline Oxide) backplane tech.

The Galaxy Note Ultra 5G is the primary telephone with this OLED screen. Samsung does mention that lower refresh rates result in image flickering because of luminance differences.

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Researchers at Samsung Display test the variable refresh rate of a display.

The world-leading display company also anticipates employing this cutting-edge, power-saving technology with other advanced IT products in the future, to help boost material efficiency and optimize the functionality of operating components.

Moreover, when in 10Hz mode, the display draws just about 60 percent of the operating power of existing display technologies.

Most devices featuring 120 Hz-capable displays on the market can operate at either 120 Hz or 60 Hz. Samsung Display mobile display planning VP Ho-Jung Lee said in a statement "Our Adaptive Frequency display technology is expected to considerably enhance the user experience by calibrating refresh rates in line with the requirements of a specific application and therein more precisely allocating available power".

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