iiyama LH5565UHSB-B1 55-inch 4K commercial display

Consider it where a screen has to be read in daylight and often from an angle: a foyer or concourse wayfinding panel, a menu board over a counter, a window or entrance display, a reception wall or a bright canteen. It is a digital signage display rated for continuous unattended use, so it suits a position that runs every day without someone tending it.

800 cd/m2 is iiyama's high-brightness tier, roughly double the 350 to 500 cd/m2 of ordinary indoor signage, and it is the figure to look for when daylight falls on the screen rather than just filling the room. The caveat on this particular model is the glossy front: brightness beats washout, but it does not stop the panel mirroring whatever is opposite it, so check the reflections at the actual position.

Glossy, at haze 1 percent. That gives a punchy, saturated image and is not a diffusing surface, so a window, a spotlight or a pale wall facing the screen will show up as a reflection. If the position has strong reflections and you cannot angle them away, look instead at the 50-inch in this range, which uses a coated matt front, or at iiyama's LH66UHSB range.

Because signage is rarely read straight on. An IPS panel holds colour and contrast as the viewer moves off-axis, which is what you want for a board mounted above head height, a window seen from along the pavement or a concourse screen people approach from the side. The trade is a static contrast figure of 1200:1, lower than a VA panel would give in a dim room.

Yes. iiyama rates the maximum non-stop operating time at 24/7 and quotes a 50,000 hour MTBF figure excluding the backlight, with a metal housing, fanless cooling and a 0 to 40C operating range. That rating, not the picture quality, is the real difference between a signage display and a consumer television left switched on.

No. Android 11 is built in with 4GB of memory, 32GB of storage, iiSignage2 content management, iiControl, iiShare, EShare and FailOver, and 802.11ac WiFi, so a playlist runs on the display itself. Two HDMI 2.0 inputs and a DisplayPort 1.2 input are there if you would rather drive it from a PC or an external player, and FailOver switches to the next available input if the main feed drops.

Three ways on this size. RS-232C on a 2.5mm sub-mini jack for a control system, an RJ45 LAN port for network control and monitoring through iiControl, and a 3.5mm IR input for an external receiver, which is what you need if the display is recessed into joinery or sits behind glass where its own sensor cannot see a remote handset.

Yes. iiyama lists landscape and portrait orientation for this model, so it works as a tall directory or poster panel as well as a wide one. Plan the content for the orientation you choose, and check the mounting pattern in the specification table against your bracket before ordering.

These two are the same screen in two sizes: both are 4K IPS panels at 800 cd/m2 with 1200:1 static contrast, a glossy front, 2 x 10W speakers, Android 11 and a 24/7 rating. Choose on reading distance and on what the fabric will take. The 65-inch weighs 20.7kg against 14.6kg and draws 104W typical against 78W, and the mounting patterns differ across the range, so check both against your bracket in the specification table. If the screen also needs an external IR receiver, note that the IR input is listed on this 55-inch and not on the 65.