The Zenfone 11 Ultra features a 6.78-inch Flexible AMOLED display, with a resolution of 2400 x 1080 pixels and a pixel density of approximately 388 ppi. It is equipped with an 8-bit E6 Samsung panel supporting LTPO technology that allows dynamic refresh rate adjustment from 1Hz to 120Hz for power efficiency, with the possibility of reaching 144Hz specifically for gaming. The panel supports HDR10 and HDR10+ for improved dynamic range and color performance. Peak brightness officially reaches up to 2,500 nits, with a high brightness mode rating of around 1,600 nits. In practical tests, the phone has achieved about 1,773 nits in auto mode under bright light, and around 831 nits at max slider brightness. Its minimum brightness can go as low as 3 nits with an extra dim mode enabled. For color accuracy, it covers around 107% of the DCI-P3 color gamut and 145.65% of sRGB, delivering vivid and immersive color reproduction. The screen is protected by Corning Gorilla Glass Victus 2 and offers a screen-to-body ratio near 88%. The device is also certified for Widevine L1, ensuring full HD streaming from services like Netflix, with hardware support for HDR10, HDR10+, and HLG content, but lacks Dolby Vision support. The display brightness adapts automatically with ambient conditions, and the phone supports different refresh rate modes: 60Hz, 120Hz, and auto which switches between them using LTPO technology. The 144Hz refresh rate, however, is limited mostly to gaming scenarios through a dedicated Game Genie feature.
The Galaxy S24 Ultra features a 6.8-inch Dynamic AMOLED 2X display, with a resolution of 3200 x 1440 pixels (WQHD+) and a pixel density around 516 ppi, which is significantly higher than the Zenfone 11 Ultra. It supports HDR10+ and offers an adaptive refresh rate technology capable of scaling refresh rates dynamically from as low as 1Hz up to 120Hz depending on content and usage, similar to LTPO but Samsung's own implementation. The display can reach peak brightness levels up to approximately 2,300 nits under typical conditions, and sometimes slightly higher in peak highlights for HDR content. Samsung is renowned for its excellent calibration, delivering very accurate colors and strong contrast, with claimed coverage over 100% of the DCI-P3 color space and calibrated to near-perfect standards, often with a Delta E below 1. The display uses HDR10+ for improved dynamic tone mapping, offers deep blacks and high contrast due to OLED technology, and features strong outdoor visibility. The screen is also protected by the latest Corning Gorilla Glass Victus 2 or similar. Additionally, the higher resolution translates to sharper images and text, particularly noticeable on large screen sizes like 6.8 inches. Samsung's display also includes advanced features like Vision Booster for high brightness and better visibility in direct sunlight [web:search results supplemented by prior knowledge].
Display Size and Resolution
The Zenfone 11 Ultra has a 6.78-inch AMOLED display with a full HD+ resolution of 2400 x 1080 pixels, giving it a pixel density close to 388 pixels per inch. The Galaxy S24 Ultra offers a slightly larger 6.8-inch AMOLED screen but with a much higher WQHD+ resolution of 3200 x 1440 pixels, resulting in a sharper pixel density of around 516 ppi. This means the Galaxy S24 Ultra will deliver crisper and more detailed visuals compared to the Zenfone 11 Ultra, noticeable especially in reading text and viewing high-resolution images.
Refresh Rate and Adaptive Technology
Both phones use advanced adaptive display refresh rate technologies to optimize power consumption and smoothness. The Zenfone 11 Ultra uses an LTPO 1~120Hz OLED panel that dynamically adjusts refresh rates down to 1Hz when idle or static content is displayed, reaching up to 120Hz in normal use and 144Hz capped for gaming apps via Game Genie. The Galaxy S24 Ultra has a Dynamic AMOLED 2X panel with adaptive refresh rates ranging from 1Hz to 120Hz depending on content, dynamically adjusting without user intervention. Samsung's implementation similarly balances smoothness and battery efficiency but does not specifically advertise a 144Hz mode; it peaks at 120Hz for general use.
Brightness and Visibility
The Zenfone 11 Ultra's display boasts a very high peak brightness capable of 2,500 nits (as per official specs), which ensures excellent visibility even under direct sunlight. Real-world measurements showed around 1,773 nits in bright light and about 831 nits with manual brightness maxed. The phone also has a low minimum brightness option (3 nits) for comfortable use in very dark environments. Galaxy S24 Ultra also performs excellently in brightness, with peak typical brightness levels around 2,300 nits, enabling outstanding outdoor visibility and HDR highlights, aided by Samsung's Vision Booster technology that enhances screen brightness in bright conditions.
Color Accuracy and Gamut
The Zenfone 11 Ultra covers 107% of the DCI-P3 color gamut and 145.65% of sRGB, which means it offers vibrant and rich colors. It targets a Delta E below 1, indicating high color accuracy. Samsung's displays are industry-leading in color accuracy, with the Galaxy S24 Ultra reportedly offering near-perfect calibration, deep blacks, and very accurate color rendering, often considered the benchmark in the industry. It supports HDR10+ with dynamic tone mapping for superior highlight and shadow detail in HDR content. The difference in color representation will be subtle but Samsung has a slight edge due to its longer history in premium display technology and fine tuning.
HDR and Content Support
Both displays support HDR10 and HDR10+ standards for enhanced dynamic range in video content. The Zenfone 11 Ultra additionally supports HLG and is certified for Widevine L1, ensuring high-quality streaming of HDR content from major platforms like Netflix. The Galaxy S24 Ultra supports HDR10+ and is well known for excellent HDR video playback with smooth tone mapping and contrast. One difference is the Zenfone 11 Ultra lacks Dolby Vision support, which is often found in other flagship competitors including some Samsung models (though not all Galaxy handsets support Dolby Vision by default).
Build and Protection
Both phones use high-quality protective glass on their displays, specifically Corning Gorilla Glass Victus 2 for the Zenfone 11 Ultra and Samsung's latest Gorilla Glass Victus 2 or equivalent for the S24 Ultra, offering excellent scratch and drop resistance.
Specific Use Case Notes
The Zenfone 11 Ultra's display is optimized heavily for gaming scenarios with a 144Hz mode accessible through a dedicated gaming feature, while daily use caps at 120Hz or less. Samsung's display provides smooth refresh rate transitions across all types of content but peaks at 120Hz, focusing on a balanced experience for all use cases rather than a specialized gaming mode.
In low light environments, the Zenfone 11 Ultra's display might appear slightly too bright when viewing HDR10 content without adjustments, while Samsung's display adjusts brightness finely for better comfort in darker surroundings.
The Zenfone 11 Ultra also supports an Extra Dim mode to lower minimum brightness down to 3 nits for comfortable night viewing, which is a notable feature for those sensitive to bright screens in darkness. Samsung phones have similarly low brightness capabilities, but specifics vary by model.
Overall, the Galaxy S24 Ultra's display offers higher resolution, finer detail, industry-leading color calibration, and very strong HDR10+ support, while the Zenfone 11 Ultra provides a very bright screen with excellent color coverage, gaming-specific high refresh rate options, and very competitive brightness levels designed for outdoor visibility and all-day usability.
This detailed comparison highlights the core technical differences and performance characteristics between the Zenfone 11 Ultra and Galaxy S24 Ultra displays based on official specs, expert measurements, and manufacturer claims.