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How to choose a short-throw projector

Catalogue

These models can project from short distances of 1 metre or less, making them ideal for use in smaller rooms where space it tight. When projecting at short distances, it is very important to use a smooth projection surface, preferably a canvas screen.

Jak vybrat projektor s krátkou projekční vzdáleností
Advantages and disadvantages
  • Suitable for small rooms
  • Project from a distance of 1 m or less
  • Perfect for presentations 
  • Suitable for use with interactive whiteboards
  • Require very smooth projection screens

Frequently asked questions when choosing a short-throw projector

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 a short-throw projector?

Short-throw projectors can be connected to multiple devices via various cables or wireless technologies.


- To connect to a notebook or PC - HDMI, DVI or VGA
- To connect to a DVD / Blu-Ray or other players - HDMI, component or composite connector
- To connect to a mobile or tablet - WiFi


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

Are short-throw projectors able to produce sufficiently large projections?

Yes, absolutely. Furthermore, a native resolution of WXGA or Full HG will ensure sharp images even in larger projections.

Why is it necessary to project onto a smooth surface?

As viewers will see the projection from relatively close up, and sometimes from narrow angles, any small creases in the projection surface will distort the image.

Short-throw projectors

  • Ideal for small rooms
  • Able to project from a very short distance
  • Require a smooth projection surface
Projektory s krátkou projekční vzdáleností

What else should I consider when choosing a short-throw 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.

Hlučnost

Noise

Projectors create a small amount of noise due to the fan that cools the projector body. The smaller the room, the more important it is to have a quieter projector. An acceptable level is up to 30 decibels.

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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