LED screen or projector: what to choose for a hall

A projector in an assembly hall, a conference room or a meeting room is a familiar solution, and it did not become a bad one just because LED screens appeared. It became a solution for a narrower set of tasks. The difference between a projector and an LED screen comes down not to “modernity” but to a few simple physical facts: what creates the image, how much light there is in the room, and what happens to the device after three years of use.

Below is a point-by-point comparison, with no attempt to declare one option right for everyone.

Light in the room

A projector draws with reflected light: the beam falls on the screen surface, which scatters it into the room. Any stray light — windows, chandeliers, stage wash — adds to the picture and lifts the black. That is why a projector needs blackout: the brighter the room, the paler the image.

An LED screen emits its own light. Every pixel is a source, and ambient light barely affects it. In our catalogue, indoor models give 350–550 cd/m² in the module series and 900–1,000 cd/m² in the 500 × 1000 mm cabinets. The first is enough under normal hall lighting, the second for panoramic windows and daytime events.

The practical consequence is simple: for a projector you turn the lights off, for a screen you do not. For a school assembly, a parents’ evening, a recorded conference or a daytime banquet, this is the decisive point. In the conference hall of the Holiday Inn Almaty hotel a screen was installed for exactly that reason: business meetings are not held in the dark.

Contrast and black

Black on a projection surface is the absence of the beam — that is, the colour of the surface itself under the current lighting. It does not go below a certain level.

Black on an LED screen is a switched-off LED. Between the LEDs there is a black mask, so the picture looks contrasty even in a bright room. The difference is most visible on dark shots, titles and graphics on a black background — precisely what is most often shown on stage and in presentations.

Size, proportions and shape

A projector is limited by geometry: to get a large diagonal you need distance from the lens to the surface or short-throw optics, and the picture is always rectangular and in a standard aspect ratio.

A screen is assembled from modules and cabinets, so:

• the size is set by the opening, not by a projection distance calculation;
• the proportions can be anything — a wide 8 × 3 m stage backdrop is as normal as a classic rectangle;
• the shape can follow the wall, and with flexible modules a column or a wave;
• there are no seams between panels, unlike a video wall of monitors.

At the I. Zhansugurov Palace of Culture in Taldykorgan we built screens with a total area of 100 m² at P3 pitch — a projector only covers that area through blackout and the depth of the hall.

Lifespan and consumables

A projector’s consumable is its light source: it degrades and at some point needs replacing, along with cleaning or replacing the filters. These are recurring planned costs.

An LED screen has no consumables. LED lifespan is 50,000–100,000 hours; the outdoor and mesh models in our catalogue are rated at 100,000 hours of round-the-clock operation. Brightness declines gradually over that time, but there is no sudden “the lamp is gone”.

Repairability works differently: if a module, power supply or receiving card fails, that particular part is replaced, not the whole device. The module comes off the front on magnets and the screen stays on the wall. We keep a stock of parts for every delivery in our Almaty store, with a warranty of 2–5 years depending on the model.

Noise and heat

A projector is cooled by a fan, and in a quiet hall you can hear it — especially from the back rows, which is usually where it hangs.

Indoor LED models work without fans: heat leaves through the aluminium housing. This matters for halls with sound recording, studios and meeting rooms with video calls. A refresh rate from 3,840 Hz across all indoor models in the catalogue means the screen appears on camera without banding or flicker — at the Eurasia TV studio in Astana the screen is right in shot.

Installation and the depth of the hall

A projector takes up the volume of the room: it needs a throw distance, a bracket, a cable run, and a clear cone of light in front of the surface. Anyone who steps up to the screen walks into that cone: part of the picture lands on the presenter’s back while the beam dazzles them. On a stage this is a permanent problem.

A screen hangs in the plane of the wall, with a construction depth of 36 to 90 mm depending on the model, plus the frame. Nothing is blocked and the presenter can stand right against it. In exchange there are new requirements: the load-bearing capacity of the wall or a frame, power and low-voltage feeds, and a weight of 30–60 kg per square metre.

Cost of ownership

Here the honest answer is this: buying an LED screen costs more than buying a projector of comparable diagonal, and that is the main argument for the projector. But the comparison should cover the whole service life, not just the first purchase. It should include:

• replacing the projector’s light source and filters — periodically, throughout its working life;
• the projection surface, blackout for the hall, sometimes reworking the lighting;
• power draw: an indoor screen averages 320 W/m² and peaks at 800 W/m² — on a large screen that is a noticeable figure on the electricity bill, whereas a projector draws less;
• repairs: for a screen, swapping a module; for a projector, servicing the whole device;
• how long the equipment stays in service.

The conclusion is not universal: a screen has a higher entry cost and lower running costs, a projector the reverse. Which works out cheaper depends on how many hours a year the equipment actually runs.

Where a projector is genuinely the better fit

• Rare events. A hall that is used a few times a year will never repay a screen through lifespan or savings on servicing.
• A very large diagonal on a limited budget. If you need to cover a whole wall and there is no money for that much screen, a projector gives the size for less — at the cost of blackout.
• A hall that is dark by nature. A cinema, a planetarium, a windowless lecture theatre: the conditions for a projector are already there.
• A temporary venue. If everything moves in a year, a permanent structure on the wall is unnecessary. For a one-off event it is easier to rent a screen — with installation and a technician on site.

Where an LED screen wins

• A school or university assembly hall. The lights are on, there are people on stage and the programme runs all day: assembly, lesson, concert, meeting. Typical tasks and the pitches chosen for them are covered on the solutions for schools page; among the sites are the assembly hall of the KIS private school and gymnasium No. 130 named after I. Zhansugurov.
• Meeting rooms and conference halls. The screen switches on like a large monitor, the lights stay on and the presenter does not walk into the beam.
• Studios and control rooms. Refresh from 3,840 Hz, no fans, a stable picture on camera.
• Bright rooms with windows. Lobbies, atriums, retail floors — places where a projector simply cannot be read.
• Daily use. The more hours a year, the more the lifespan and the absence of consumables count.

How to decide

Answer four questions and the choice usually makes itself:

1. Can you turn the lights off in the hall during events? If not — a screen.
2. How many hours a year does the equipment actually run? Tens — a projector; hundreds or more — a screen.
3. Do people stand in front of the image? If so, the projector’s cone will always be in the way.
4. Is there a wall that will carry 30–60 kg per square metre, and where can power be brought in?

Send us a photo of the hall, the dimensions of the wall or opening, and the distance to the front row, and tell us what you show and how often. We will price a screen in the calculator in several pitch and size options — and tell you honestly if a projector is enough in your case.