LDV55-PAI400L

A vertical 4K display for continuous signage duty

The Dahua LDV55-PAI400L is a 55-inch LCD signage display designed to stand in portrait orientation on the base supplied with it. Its 2160 × 3840 panel suits menus, wayfinding boards, directories and promotional loops that read best in a tall format. The manufacturer rates the unit for operation up to 24 hours a day and describes the panel as industrial-grade, which matters in lobbies and corridors where a screen must stay lit from opening time to closing time and beyond.

Panel facts that matter once the screen is on the wall

• 700 cd/m² typical brightness for indoor viewing
• IPS/VA panel type with 178° horizontal and vertical viewing angles
• Typical contrast of 1200:1 (IPS) or 5000:1 (VA), as listed by the manufacturer
• 10-bit (8-bit + FRC) colour, 1.07 billion colours
• 8 ms typical response time and a 1% haze surface treatment

Viewing angle matters on a vertical screen because people approach from the side as well as from the front. The low-haze surface reduces reflections from nearby glass and lighting. With typical brightness rated at 700 cd/m², positioning the panel away from direct window light will keep content clear during the day.

Android playback, codecs and connections

The unit runs Android 11 on a quad-core A55 processor at 1.92 GHz, with 4 GB of RAM and 32 GB of internal storage. It decodes H.265 and VP9 up to 2160p at 60 fps, H.264 up to 2160p at 30 fps, and older formats such as MPEG-4 and WMV/VC-1 up to 1080p. Supported containers include mp4, avi, mov, mkv and wmv. Connections are one HDMI 2.1 input accepting 4K at 60 Hz, one 10/100/1000 Mbps Ethernet port, one USB 2.0 and one USB 3.0 Type-A port, a TF card slot up to 128 GB, and a 3.5 mm audio output. The HDMI port is input only, so the display cannot pass its signal on to a second screen. Wi-Fi needs an optional external module, and Bluetooth is not provided.

Scheduling, split screens and remote management

The built-in software supports split-screen layouts with freely adjustable zones, so one panel can show a clock, a timetable and a video at the same time. It uses a browser-server architecture in which content is scheduled by time and location, and operation reports are generated so facilities teams can confirm that playlists ran as planned. Devices can be controlled from a unified management platform, which means changes do not require a site visit. Two 5 W speakers are built in, and the IR receiver works with the remote control included in the box.

Where it fits in Qatar

In a private clinic in Al Sadd, a 55-inch portrait screen beside the reception desk can display department directions, queue information and health awareness content. In a shopping mall in West Bay, a pair of these screens at a store entrance can run promotions through opening hours. In a hotel lobby in Msheireb, a single unit can show an event board and a wayfinding map. Heat is the main siting constraint in Qatar. The operating range is 0 °C to +40 °C, and the manufacturer advises avoiding direct sunlight, so the unit belongs indoors in an air-conditioned space away from windows that face the afternoon sun. Outdoor or semi-enclosed sites need the environment confirmed before ordering.

Planning the installation

The unit measures 1900 × 775 × 460 mm with its base and weighs 57.6 kg net or 63.1 kg packed, so it needs at least two people to move and a level, stable floor position. Check lift dimensions, doorway widths and floor levels before delivery. The power supply accepts 100–240 VAC at 50/60 Hz, which covers Qatar's 240 V supply, and consumption is up to 220 W with standby at 0.5 W or less. The unit carries CE EMC, CE LVD and CE ERP certifications as listed by the manufacturer. Confirm that the supplied power cord suits BS 1363 sockets on site.

SmartRooms Qatar offers free site surveys across Doha and the other municipalities, and quotations are usually returned within one working day. Request a quote for the Dahua LDV55-PAI400L and include the quantity, installation location and whether you need a purchase order or tender paperwork.