P3.91 Indoor Stage and Exhibition LED Wall, 500x1000mm Rental Cabinet for Conference and Trade Show Screens

Indoor audiences are close, sober and critical. A delegate sits a short distance from the backdrop and looks at it for two days; an exhibition visitor passes a stand wall at conversational range and sees every join. What such an audience notices is not a brightness figure but whether text is clean, whether a background gradient shows steps, whether the wall is quiet during a keynote, and whether the set looks finished at its edges. Indoor LED procurement is therefore a specification-and-verification exercise, and this page is an application-focused proposal for a P3.91 wall in stage and exhibition roles, subject to project review.

The hardware basis is a 500×1000×95 mm aluminium-magnesium alloy cabinet of 16 kg, built from eight 250×250 mm modules in a 2×4 layout. Each module is 64×64 pixels at 0.5 kg, so a cabinet carries 128×256 pixels, 32,768 dots, at 3.91 mm pitch and 65,536 dots per square metre. Nothing in that description tells a buyer how a finished wall will look; that depends on the sample, the content and the acceptance test agreed before the show.

Four qualities decide whether an indoor wall reads as professional. Surface evenness, because an uneven face is visible in raking light. Uniformity, because a slight colour shift between cabinets looks like a defect on a plain background. Noise, because cooling behaviour that is inaudible in a foyer is obvious in a silent plenary. Finish at the edge, because indoor walls are framed by set pieces and drapes, and a ragged line ruins the composition.

None of those can be guaranteed by a datasheet paragraph, and this page does not claim them. They are secured by a sample evaluation, by a written acceptance test on the finished wall, and by a documented baseline that later service can be compared against. Buyers should require all three in the purchase order, whatever brand they choose.

Because a cabinet is exactly 128×256 pixels, a designer can convert a proposed set into a pixel map before any hardware is discussed: N columns give N×128 pixels wide, M courses give M×256 pixels high. That arithmetic is useful during concept design, when the question is whether a given wall shape matches the content formats and the opening the set builder has drawn.

The 500×1000 mm proportion is a design input, not a promise. Buyers should confirm the finished outline with the set designer, then check the resulting pixel map against the slide format, the video assets and any camera framing that matters during the event.

Brightness is ≥1500 cd/m² in the supplied specification, which is a floor rather than a setting recommendation. In a darkened plenary the wall will usually run well below that, and 256-step brightness adjustment allows dimming to suit the room; in a lit exhibition hall the same figure determines whether graphics hold up.

Sixteen-bit grayscale with 1,024 levels per colour channel supports smooth tonal transitions in corporate backgrounds, which is what prevents visible banding on a large surface. Viewing angle is 120° horizontal and 120° vertical; whether that covers side seating in a specific room is a layout question. The supplied specification recommends a nearest viewing distance of 7 m, which is guidance for this configuration rather than a rule about where the wall may stand.

The display is specified for text, graphics and video, with a frame frequency of ≥60 frames per second. Refresh appears as 1920 Hz in the supplied setting information and should be confirmed as the final configured value before the event is promised to a broadcaster, because camera artefacts depend on refresh, shutter and content motion together.

In practice, indoor jobs switch between a presentation mode with slides and live image magnification, and an ambient mode with looping brand films at lower brightness. Buyers should test both modes at the sample stage, and should define the input list so the show operator can change sources without re-patching.

The cabinet weighs 16 kg and its modules 0.5 kg each; those are mass figures. Build sequence, crew size, access equipment and the method of getting the wall into the hall are decisions for the production company and the venue, expressed in a method statement and a risk assessment.

Service access is likewise a project decision. Whether the wall can be served from behind, whether modules can be replaced with the wall in place, and what tools are required must be confirmed with the factory, because the answers determine whether a fault during a two-day show is a short intervention or a rebuild.

Input is AC110–220V ±10% at 50/60Hz, with DC 5V output at 40A, 60A or 80A depending on the supply option. Maximum consumption is 1000 W/m²; average consumption appears as either 250 W/m² or 300 W/m² in the source data and is not treated as final here. Design against the maximum and confirm the configured average before booking the venue's power allocation.

Signal routing is usually the part that surprises a production team: runs across a hall, patching at the set, and changeover between playback, camera and graphics. Confirm control platform compatibility against the equipment the production already tours with, and document the input map in the show file.

CE, RoHS and FCC documentation is available as claimed certification and must be verified against the final shipment model and destination market; no independent third-party validation is implied. Front protection is IP54 and rear IP43, which is more than adequate indoors, where carpet dust is the realistic concern rather than water.

Operating range is −30°C to 50°C at 15%–85% humidity. MTBF is listed at 5,000 hours and lifespan at 100,000 hours; both are supplied planning figures. Where a venue or stand builder requires fire performance documentation, structural calculation or electrical certification, that must be sourced separately and stated in the enquiry. No fire rating, service-period commitment or venue approval is claimed on this page.

Define the set drawing and wall outline, viewing distances, camera use, ambient light, venue power, rigging or ground-support rules, load-in windows, service access expectation, documentation required by the venue, and the acceptance test criteria. Ask for each point to be answered against the supplied specification.

Send the set drawing, wall dimensions, camera plan and venue constraints, and we will return a specification-based proposal for your production team to review. Suitability, access and approvals remain subject to that project review.

Q1: Is this wall bright enough for a lit exhibition hall? At ≥1500 cd/m² it sits comfortably inside typical hall lighting and can be dimmed through 256 steps for evening receptions. Where daylight falls directly on the wall, expect a contrast loss and design content with stronger contrast.

Q2: Can the wall be used for camera work and live streaming? The display is specified for video at ≥60 frames per second, and refresh is listed at 1920 Hz in the supplied setting information. On-camera behaviour depends on your shutter and content, so test it with the production's camera package and confirm the final refresh configuration.

Q3: How do we handle a fault during a two-day show? That depends on the service access agreed at purchase. Confirm with the factory whether modules can be replaced with the wall installed, from which side, and with what tools — then write the procedure into the show's contingency plan.

Q4: What wall height can we specify? Any multiple of 1000 mm within the venue's rigging or ground-support limits, expressed as a pixel map so content can be designed to the native resolution. The constraint is the venue and the set, not the cabinet format.