iiyama LH5575UHS-B2AG 55-inch 4K commercial display

It suits a reception, a foyer, a canteen, a corridor, a retail floor or a shared office space that needs a 4K screen running all day. At 55 inches it is the middle size of this range and is meant to be read from several metres by people moving through the space, which is what the IPS panel and its wide viewing angle are for.

It is a standard slot for a plug-in compute module that sits inside the display and is powered by it. Fit one and the screen runs whatever that module runs, typically Windows, so the content platform is yours rather than the display maker's. It also removes the player box, its power supply and its cable from behind the screen, which matters on a flush wall mount in a public area. The module is bought separately.

Usually because of IT policy or an existing platform. Some organisations will not put a vendor Android device on their network, and others already run a signage or room-booking application that only exists for Windows. A compute module in the slot gives them the managed operating system they already support, on the same estate tooling, with none of the cabling of an external player. If neither applies, the built-in system is the cheaper route.

No. Android 11 is built in with iiSignage2 content management, iiControl, iiShare, EShare wireless sharing and FailOver input recovery, on 4GB of memory and 32GB of storage with a micro SD card slot for local media. Three HDMI 2.0 inputs and a DisplayPort 1.2 input are there if you would rather drive it from a player, a PC or a compute module.

Because a signage screen often becomes the only display in the space. Three HDMI 2.0 inputs plus DisplayPort 1.2 let a lectern laptop, a room PC and a player stay connected without a switcher, which is exactly what a lectern position or a small rack feed needs. Audio return channel sits on the third HDMI if sound goes back to a soundbar or an amplifier.

No. At 500 cd/m2 this is the standard indoor signage level, right for a foyer, a corridor, a canteen or a retail interior. A glazed shop front, or any position where sunlight falls on the glass, needs the high-brightness tier that starts around 800 cd/m2. Measure the light at the position first, because a washed-out window screen cannot be fixed afterwards.

Yes. iiyama rates it for 24/7 non-stop operation, it is fanless so it adds no noise to a quiet space, and anti image retention is built in for layouts with fixed elements such as a logo or a header bar. The quoted MTBF figure is 50,000 hours excluding the backlight, and the operating temperature range is 0 to 40 degrees C.

Yes. iiyama lists landscape and portrait orientation for this model, so it works as a tall wayfinding or directory panel as well as a wide menu board. Set the orientation in the display settings and lay the content out to match before the screen is fixed to the wall, and check that the bracket supports the rotated position.

It measures 1237.5 x 710 x 55mm and weighs 15.2kg, 20.6kg in its box, so it is a two-person lift onto a flat wall mount. The mounting pattern is listed in the specification table on this page. Leave the rear connections reachable, since HDMI, DisplayPort, network and control ports all sit behind the panel, and allow access to the module bay if compute is going inside.

Choose by the furthest point people will read from and the smallest text in your content, because the two are otherwise closely matched: both are 4K IPS at 500 cd/m2 and 1200:1, with 2 x 10W speakers, three HDMI inputs, Android 11, an SDM-L slot and 24/7 operation. The practical differences are physical and electrical. The 65-inch weighs 21.2kg against 15.2kg, draws 172W against 127W, and is 1456.5mm wide against 1237.5mm, so check the wall, the access route and the running cost before sizing up.