Interactive flat panels are brighter and simpler; interactive ultra-short-throw projectors give a much larger image for less money and are easier to ship and install. For small or very bright classrooms a panel is usually right; for standard and large classrooms, remote schools and budget-per-inch tenders, an interactive projector usually is. This guide compares them factor by factor.
Key takeaways
- Interactive flat panels (IFPs) win on brightness and simplicity; interactive UST projectors win on image size and cost per inch.
- Most IFPs are 65–86 inches; a UST projector easily makes 100 inches or more on an existing board.
- Large panels are heavy and fragile to ship and install — a real cost in remote and multi-province rollouts.
- Decide per classroom type, not per country: many successful tenders use both.
The two options in brief
An interactive UST projector mounts on a wall arm above the board and adds a touch or pen module, so teachers write directly on a large projected image. An interactive flat panel (IFP) is a large touch display — essentially a classroom-sized tablet — mounted on the wall or a trolley.
Head-to-head comparison
| Factor | Interactive UST projector | Interactive flat panel |
|---|---|---|
| Image size | Typically 80–120"; adjustable on site | Fixed, typically 65–86" (some larger) |
| Brightness in lit rooms | Needs blinds or a suitable board in very bright rooms | Strong; unaffected by ambient light |
| Cost per inch at 100"+ | Low | High; very large panels are expensive |
| Weight and installation | Light unit and wall arm | Heavy; wall must carry the panel |
| Shipping and breakage risk | Small cartons | Large glass panels; higher damage risk |
| Shadow / glare | Minimal with UST | None |
| Lifespan of light source | Laser around 20,000 h | Backlight typically rated for tens of thousands of hours |
| Repair if damaged | Replace projector or module | Damaged glass often means replacing the panel |
| Built-in computing | Usually external (PC, OPS, box) | Often built-in Android / OPS slot |
Typical characteristics; check individual specifications.
Interactivity technologies compared
| Technology | Used on | Strengths | Watch-outs |
|---|---|---|---|
| Infrared touch frame | Most IFPs | Finger and pen, many touch points | Frame can be damaged by impact |
| Infrared light curtain + camera | Interactive UST projectors | Finger touch on a large image, reuses existing board | Needs a flat surface and calibration |
| Infrared / active pen | Projectors and some panels | Precise, low cost | Pens get lost; spares needed |
Image size and the back row
A classroom of 40 students has a back row 7–9 m from the board. Using the 6× guideline for general reading (see the resolution guide), content should be about 1.2–1.5 m high. A 100-inch 16:10 projected image is 1.35 m high; an 86-inch 16:9 panel is about 1.07 m high. That difference is why large classrooms and lecture rooms often stay with projection.
Brightness and the room
Panels are emissive and look bright in any room, which is their biggest advantage. Projectors depend on the light falling on the board: with blinds and sensible lighting, 3,800–4,200 ANSI lumens is comfortable on a 100" board; in very bright rooms, use an ALR board or choose a panel. The lumens guide shows the calculation.
Software and content ecosystem
Teachers adopt the tool that makes lesson preparation easy. Check which whiteboard software is included, whether it is licensed per device or per school, which languages it supports, and whether it opens the file formats teachers already use. Panels often include an Android system and app store; projector classrooms usually run software on the classroom PC. Either can work — what matters is that the software is consistent across the schools in the tender.
Total cost of ownership for a rollout
- Equipment — compare like for like: projector + interactive module + board + wall arm versus panel + mount (+ OPS PC if needed).
- Logistics — volumetric weight and breakage for large panels, especially for inland and island deliveries.
- Installation — wall reinforcement for panels versus arm alignment and calibration for projectors.
- Energy — compare rated power at typical brightness; large panels and bright projectors are in a similar range, so check datasheets.
- Service — light-source life, filter cleaning, and the cost of the most likely failure (a cracked panel vs a replaced projector).
Decision matrix for tenders
| Situation | Better fit |
|---|---|
| Small classroom, bright windows, no blinds | Interactive flat panel |
| Standard classroom, 40+ students, image ≥ 100" | Interactive UST projector |
| Remote or island schools, difficult transport | Interactive UST projector |
| Early-years rooms, touch-first apps | Interactive flat panel |
| Existing good whiteboards to reuse | Interactive UST projector |
| Tight budget per square metre of image | Interactive UST projector |
For projector-based classrooms we recommend the PSE-4200UST with optional multi-touch, or the PSE-3800UST for non-interactive tender lots.
Training and adoption
The most expensive classroom technology is the one nobody uses. Budget for a short hands-on training session per school, a one-page quick guide in the local language and a named contact for the first term. For projector classrooms, include calibration and focus checks in the training; for panels, include software updates and account management.
Recommended models
Frequently asked questions
Questions on this topic
Are interactive projectors outdated?
Can a projector be interactive without a special board?
Which is more durable in schools?
Can one tender include both?
Building a classroom bill of quantities?
Send room types and counts — we propose the projector-based rooms with board, arm and interactive module included.