![]() The light output from a projector is also commonly measured in lumens. Lumens are commonly used in light bulb product specifications to describe how bright the light is. Luminous flux is a measurement of how much light is emitted by a source measured in lumens. The lumen (lm) is the unit of measurement for luminous flux in the International System of Units (SI). We sell Sunlight Readable displays and IPS displays designed with high brightness LED backlights for outdoor applications. For LCD displays used outside, 400-700 nits are minimum for use in daylight conditions, andĪt least 1000 nits to view in bright, direct sunlight. In simpler terms, nit is just a different name for candela.Īverage consumer LCD displays have a luminance of 200 to 350 nits. Light measurement units - Lumen, Lux and Candela. The most common units used to measure light are Lumen, Lux and Candela. ![]() We can measure light based on the brightness seen by the human eye. Some of the highest candela ratings are seen in spotlights or lasers since most of its light is concentrated in one direction. The light from one candle is roughly one candela. A candela measures the amount of luminance intensity from any point in a single direction. Candela: The unit measurement for light intensity.The candela is the SI unit for luminous intensity. Luminous intensity: Amount of visible light emitted from a source in a particular direction per unit solid angle.Luminous Flux (Lux): The amount of light emitted in every direction and measured in lumens.Lumen: The total amount of visible light emitted from a light source.Luminance is also referred to as brightness. Luminance: The perceived amount of light emitted from an object.Illuminance: The amount of light that hits a surface.The basic mode on my review unit was also tinted slightly too yellow with an average deltaE of 6346K.Before we compare light measuring units, it's essential to understand some concepts: Here the S9+ hovers around a deltaE of 2.0, which is decent, though not as accurate as the best Pixel 2 modes. With the basic mode enabled, color performance is improved and again, the Galaxy S9+ is slightly more accurate than the Galaxy S8+. The AMOLED Photo and AMOLED Cinema modes still use gamuts larger than sRGB and are therefore useless in most situations. For most people, the default mode will look fine as you'll get that vibrant look, but if you want accuracy, you'll need to switch to the 'basic' mode in the device settings. The Galaxy S9+ is slightly more accurate by default compared to the Galaxy S8+, though when we're talking about deltaE's above 5.0, it doesn't make much difference. Samsung goes hard with oversaturation and expanding the color gamut above sRGB, which does look good in some situations, but larger gamuts are not properly supported by the vast majority of Android apps. In terms of accuracy, it won't surprise you that the Galaxy S9+'s display is not accurate under the default settings. My only slight concern are some distortions along the curved edges, and I'm still not sure why Samsung needs to curve the edges as they don't really serve any purpose except distorting the image and making the phone more fragile. That's essentially dead accurate across the display. The panel also has excellent uniformity, which really should be expected on a small high-end display, with a maximum deltaE deviation of just 1.5 relative to the center. I also measured up to 864 nits at 10% white, which makes the Galaxy S9+ very suitable for HDR content and it's no surprise HDR is supported on this handset.Īs expected, the Galaxy S9+'s black point is 0, so you achieve effectively infinite contrast. This remains the highest 100% white brightness I've seen from an AMOLED display, thanks to Samsung's brightness boost feature in strong sunlight. In terms of brightness, the Galaxy S9+ is capable of the same 574 nits at 100% white as the Galaxy S8+, with excellent viewing angles. We set every phone we test to the native display resolution where possible for an apples-to-apples comparison, too. The full resolution does provide a slight increase in clarity and overall display quality, and there's not much point having such a high resolution display on a high-end phone if you're not going to use its native resolution. The Galaxy S8+ ships with the display set to a non-native 2280 x 1080 resolution, so one of the first things we did is increase that to its full 2960 x 1440 for all testing. ![]() The Galaxy S9+ retains the 6.2-inch 2960 x 1440 Super AMOLED with curved edges and rounded corners, and it appears that the technology that's been used for this display is largely the same as what went in to the Galaxy S8 displays. Not a lot has changed compared to the Galaxy S8 and S8+ on the display front which is a pretty good thing.
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