Setting image resolutions and refresh rates on connected devices
Set connected computers and other devices to the resolutions and refresh rates recommended in a display’s documentation to ensure the best possible image quality. See the documentation for connected computers or other devices for instructions.
Important
SMART does not assess, inspect, or test third-party products for compatibility with SMART products, and thus cannot guarantee, represent, or warranty that those products will be compatible with SMART’s products or that they will perform as represented by the supplier. SMART recommends that you test third-party products to determine their suitability with your integration scenario. Contact the manufacturer of the third-party device or application for technical support.
ResolutionsMany displays support full high definition (FHD) 1080p and 4K ultra high definition (4K UHD) resolutions, provided the source device meets the minimum requirements for such resolutions.
Resolution | Pixels | Details |
|---|---|---|
FHD (1080p) | 1920 × 1080 (2.1 megapixels) | Most modern video devices (computers, laptops, DVD players and Blu‑ray disc players) support FHD resolutions. Check a device’s specifications to see which resolutions it supports. SMART recommends a digital HDMI, DVI or Display Port connection for best results with FHD. Although an analog VGA connection might support FHD, the video quality may be degraded, particularly if the VGA cable is longer than |
4K UHD | 3840 × 2160 (8.3 megapixels) | A 4K UHD display has greater pixel density than an FHD display. A 4K UHD display can show up to four times as much visual information as FHD displays. Notes
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SMART advises against the use of an analog video connection for displaying FHD or 4K UHD because analog video connections can not display high-resolution images with adequate picture quality. Use HDMI or Display Port connections (including DP-Alt mode via USB Type-C connections) when displaying FHD or 4K UHD.
Refresh rates (30 Hz versus 60 Hz)Displays can support different refresh rates, typically 30 Hz or 60 Hz. Higher refresh rates can result in smoother, flicker-free video. This is most evident when using 4K UHD.
Most computers support a refresh rate of 60 Hz. Using the highest frame refresh rate possible will provide a better experience when using the display, provided the connected device supports the refresh rate. If it doesn’t, you may need to set the device’s display settings to a lower refresh rate or to a lower image resolution to maintain a higher refresh rate.
Note
To display 4K UHD at 60 Hz on the display, use the Display Port (if available) or HDMI 2.0 video sources as display inputs. HDMI 1.4 supports only 30 Hz at 4K UHD.
Supporting other resolutionsIf the connected device doesn’t support FHD or 4K UHD, refer to the display’s documentation for other supported resolutions. Using a resolution other than the display’s native resolution can cause the pixels to be scaled, resulting in slightly blurry text and images. If the connected computer is using a different aspect ratio than the display’s, the image can appear stretched or compressed. The image might also appear in letterbox or pillar-box, with black bars beside or above and below the image. When this occurs, the touch location may not be accurate, and the user may need to orient the touch system to the displayed image by using the Orient procedure in SMART Product Drivers.