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LG 27UQ850 with 60Hz 4K UHD IPS Black panel

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‘4K’ UHD IPS models are popular and versatile choices, providing an excellent pixel density and strong ‘desktop real estate’ potential. The LG 27UQ850 (27UQ850-W due to mainly white rear) provides this, with an enhanced contrast ‘IPS Black’ panel. The styling is in-keeping with many other modern LG models, including those in the ‘UltraFine’ series to which this belongs. The top and side bezels are dual-stage with slender panel border flush with the rest of the screen and slim hard plastic outer part. The OSD (On Screen Display) is controlled by a joystick which faces downwards in the central region of the bottom bezel.

Simple and modern design

A 27″ 3840 x 2160 (‘4K’ UHD) LG Display ‘IPS Black’ panel is used, most likely the LM270WR9-SSA1. This model has a specified static contrast ratio of 2000:1, twice the usual specified for an IPS model. Other aspects of note include a very light matte anti-glare screen surface, 178°/178° viewing angles and 10-bit (8-bit + FRC) colour support. A 60Hz refresh rate is supported alongside Adaptive-Sync, including AMD FreeSync with 40 – 60Hz VRR range. Hardware calibration is supported using LG Calibration Studio software and a compatible colorimeter, allowing the LUT of the monitor to be directly addressed and custom calibrated presets loaded onto the monitor. A flicker-free (‘flicker safe’) WLED backlight provides a 98% DCI-P3 colour gamut and 400 cd/m² typical maximum luminance.

VESA DisplayHDR 400 support is included, allowing a basic response to HDR10 content. The generous DCI-P3 coverage can be put to good use with 10-bit colour processing. But the brightness is limited by HDR standards and local dimming isn’t required to enhance contrast. A 5ms grey to grey response time is specified (pinch of salt required), with ‘Dynamic Action Sync’ (DAS) included as a nod towards low input lag. The included stand attaches centrally and can be easily removed via a quick-release mechanism. It offers tilt, height adjustment and pivot into portrait. Removing the stand reveals provision for 100 x 100mm VESA mounting. The ports face backwards in a recessed area to the right of the stand attachment point and include; USB-C (90W PD, DP Alt Mode, upstream data), DP 1.4, 2 HDMI 2.0 ports, 2 USB 3.0 ports plus Type-B upstream, a 3.5mm headphone jack and DC power input (external ‘power brick’). 2 x 5W Maxx Audio speakers are included.

A white rear

Further details can be found on the manufacturer’s website. The monitor is listed for ~$700 USD. A variant with included calibration sensor is also available for ~$800 USD, the 27UQ85R.

LG 27UQ850