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How to choose an interactive projector

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As the name suggests, interactive projectors allow you to interact directly with the projected image on the screen. This means you can change or move content within a presentation as if the canvas was a touch screen. All of this works thanks to a system of sensors and an electronic pen.

Jak vybrat interaktivní projektor
Advantages and disadvantages
  • Interat directly with the projected image during a presentation
  • Perfect for business or educational presentations
  • A cheaper alternative to interactive whiteboards
  • Require a smooth, hard projection surface

Frequently asked questions when choosing an interactive projector

What are interactive projectors best suited for?

Interactive projectors are a good way to spice up educational or business presentations. As you can make direct changes to the projected image during presentations, you no longer need to fiddle around with a computer, as is the case with conventional projectors.

How do interactive projectors work?

Interactive projectors have a built-in sensor that detects the position of an electronic pen. The sensor transfers the pen strokes to a computer, and then from the computer onto the screen via the projector. This closed loop system allows the user to write on the projected image in real time.

Can I project onto a wall, or it is necessary to use a special screen?

In order for the electronic pen to glide smoothly, the surface should be smooth and hard. Some surfaces such as soft plaster are therefore unstuitable for interactive projectors.

What is the difference between native and maximum image resolution?

Native resolution is often confused with maximum resolution. Maximum resolution is not the resolution of the projector but an indication of the highest possible resolution that the projector can convert to its native resolution. A film with a resolution higher than the maximum resolution of the projector cannot, therefore, be converted and displayed by the projector.

What is the difference between DLP and LCD technologies?

DLP projectors offer quality colour reproduction, high contrast, and low maintenance. One downside is the occasional presence of the so-called 'rainbow effect'. DLP projectors either have a halogen lamp (larger size and higher luminosity) or LEDs (lower power consumption and smaller dimensions).

LCD projectors provide excellent colour reproduction and high durability, but offer lower contrast than DLP projectors as well as higher maintentance.

What other devices can I connect to an interactive projector?

Interactive projectors can be connected to other devices via various cables or wireless technologies.


- To connect to a notebook or PC - HDMI, DVI or VGA
- To connect to a mobile or tablet - WiFi technology
- For multimedia playback on a network - LAN connector


TIP: Before buying, check what types of connection are supported by your device. If the projector has no common connector, use a reduction cable.

Interactive projectors

  • Allow you to interact directly with the image
  • Ideal for teaching or business presentations
Interaktivní projektory

What else should I consider when choosing an interactive projector?

Rozlišení

Resolution and optimal viewing distance

Native resolution is based on the basic resolution of the image element (DMD chips for DLP projectors, LCD panels for LCD projectors). However, besides the basic resolution, projectors can display resolution lower or higher than native. In terms of quality, however, the picture will be worse, although this may not be visible to the human eye. The optimum viewing distance is derived from the native resolution; the closer you sit to the projector screen or wall, the higher the resolution should be. If the resolution is too low, the image quality will blur and pixelate.

Optimal viewing distanceProjection sizeSuitable native resolution
2 m1 to 1.6 mHD or higher
3 m1.6 to 2.4 mHD or higher
4 m2 to 3.2 mFull HD or higher
5 m2.5 to 4 mFull HD or higher

Read about the difference between native and maximum projector resolution.

Světelný tok

Luminous flux (luminosity)

Luminous flux is measured in lumens (lm) and indicates the brightness of the projected image. The darker the room, the less bright the projector needs to be.

  • Up to 2,000 lm - suitable for darkened rooms with minimal lighting.
    2000-3 000 lm - more suited to dimly lit rooms.
    Over 3,000 lm - provides highly visible projections, even in daylight.

Technologie promítání

Projection technology

DLP projectors offer quality colour reproduction, high contrast, and low maintenance. One downside is the occasional presence of the so-called 'rainbow effect'. DLP projectors either have a halogen lamp (larger size and higher luminosity) or LEDs (lower power consumption and smaller dimensions).

LCD projectors provide excellent colour reproduction and high durability, but offer lower contrast than DLP projectors as well as higher maintentance.

Užitečné funkce a vlastnosti

Useful functions and features

Remote control - for simple setup and operation of the projector from anywhere in the room.
Keystone correction - a function that corrects the output image if a projector is not placed perpendicular to the horizontal centerline of the screen (too high or too low).
Zoom - changes the image size without moving the projector.
PiP (Picture in Picture) - the projection of two images (video or photo) next to each other from two different sources.
Integrated battery - allows a projector to be used without mains electricity for several hours.
Built-in speaker - offers basic audio. Higher quality sound can be achieved by coupling the projector with a home theatre system.

Glossary - Projectors

Keystone correction

Keystone correction is a function that corrects the output image if a projector is not placed perpendicular to the horizontal centreline of the screen (too high or too low).

FOV

FOV (Field of view) is the angle formed between your view and the projected image. The closer you are to the image and the longer the diagonal, the greater the angle, and vice versa.

PiP

Picture in Picture (PIP) means displaying two images (video or photo) from two different sources next to each other.

Glossary
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