Unlike outdoor screens, meeting room and lobby media walls are viewed up close, for long periods, often with text. A single step in pitch is immediately visible, and so is the cost difference. Based on our indoor lineup (P1.25 / P1.53 / P1.86 / P2), here's what suits which space.
In short: P1.25–P1.5 for executive meeting rooms and control rooms, P1.5–P1.86 for lobbies and showrooms, and P2 for auditoriums and event venues.
1. Start by measuring the distance
The reference is the distance between the screen and the closest viewer.
Minimum viewing distance (m) ≈ pitch (mm) applies indoors as well. If the end of the meeting table is 2.4m from the screen, you need P1.5–P1.86; at 1.5m, P1.25. Pass-by spaces like lobbies are based on 3–4m, so P1.5–P1.86. Auditorium stage screens have front rows 4m or more away, so P2 is enough.
2. Screen size and resolution
It depends on whether you'll show 4K documents or just video.
If viewers need to read small text such as spreadsheets, drawings or split CCTV feeds, use P1.25–P1.5 for a 4m-wide screen (2,600+ horizontal pixels). For mostly video and images, P1.86–P2 is enough. To show 4K content pixel for pixel, P1.5 on a 6m-wide screen is the benchmark.
| Screen size | P1.25 | P1.5 | P1.86 | P2 |
|---|---|---|---|---|
| 3m × 1.7m | 2,400 × 1,350 | 2,000 × 1,125 | 1,613 × 907 | 1,500 × 850 |
| 4m × 2.25m | 3,200 × 1,800 | 2,667 × 1,500 | 2,150 × 1,210 | 2,000 × 1,125 |
| 6m × 3.4m | 4,800 × 2,700 | 4,000 × 2,250 (near 4K) | 3,226 × 1,815 | 3,000 × 1,700 |
3. Lower screen brightness in meeting rooms; account for windows in lobbies
Indoor 800–1,200 nit modules are fine, but the brightness you actually use differs.
In meeting rooms, dim to around 300–500 nit under the lighting for comfortable viewing. In lobbies with large windows, raise it to 800 nit or more during the day. If direct sunlight hits the window area, indoor modules aren't enough, so we look at semi-outdoor specs (2,500 nit or more). Running at lower brightness also extends lifespan.
4. Easily overlooked in meeting room media walls
Beyond pitch, these four determine satisfaction.
Aspect ratio: to show a laptop screen (16:9) as is, match 16:9 in module multiples (e.g., 3.84m × 2.16m)- Inputs · switching: multiple HDMI sources, wireless mirroring, video conferencing camera position (top center of the screen)
- Heat · noise: fan noise is distracting in meeting rooms, so use fanless or low-noise cabinets with ventilation space at the back
- Maintenance access: for flush wall recesses, front-service modules are a must
① Which setup for which space
With examples from our projects.
| Space | Recommended setup | Reference project |
|---|---|---|
| Executive meeting rooms · control rooms (1.5–3m) | P1.25–P1.5, 16:9, low noise, front service | — |
| Lobbies · showrooms (2–4m) | P1.5–P1.86, higher brightness near windows, touch option | Kosco Dongtan media wall (touch, 8m×3m) |
| Exhibitions · mobile | P1.25–P2.5 cubes, demountable structure | EXCO 3-tier cube · anamorphic cube |
| Auditoriums · event venues (4m+) | P2; check brightness against stage lighting | — |
② Selection checklist
Decide in this order.
- Closest viewing distance (m) → maximum pitch
- Content to display (documents, CCTV, video) and screen width → check resolution
- Window and lighting conditions → brightness spec
- Laptop and video conferencing connections → input setup
- Wall recess or not → front-service modules and ventilation
Indoor pitch, distance and 4K: DOIT Vision, How to Choose LED Pixel Pitch · DGI, Choosing Pixel Pitch for a Video Wall · Christie, Understanding Pixel Pitch · Planar, Recommended Viewing Distance (PDF) / Brightness: Litemax. Lineup specs are typical values from LO-GIN IT product pages; projects are from installation records. Materials from domestic competitors were not cited, and figures vary by manufacturer, model and site.
Recommended specs for this guide
- Meeting rooms · control rooms: P1.25–P1.5
- Lobbies · showrooms: P1.5–P1.86
- Auditoriums · event venues: P2
- Check 16:9 · front service · low noise