In principle, every projector is suitable for projecting the various training units. But here, too, you get what you pay for. Projectors are available for a wide range of applications in all price ranges. I am putting together a few features that are important for a purchase decision
- Resolution
I recommend a True HD 1080p resolution (1920 x 1080). Most films are already recorded in this format and all graphics cards (notebook / PC) support this resolution. Smaller resolutions are out of date and time is not yet ripe for higher resolutions. - Luminous intensity
Nothing beats cubic capacity, just more cubic capacity. So it also stands for the light intensity of a projector. The more light a projector can emit, the brighter the ambient light may be. This applies in particular to projectors, which are also used for data presentations in training rooms. Please note that the light intensity is specified by most manufacturers in data mode. In the qualitative video mode, the light intensity is usually reduced for better color display. So compare the light intensity in video mode - Image adjustment
No projector can be placed optimally, a little too high and / or a little to the side. You will find it extremely easy to set up and adjust your projector if it has a horizontal as well as a vertical lens. Any kind of digital adjustment is strongly discouraged, as this affects the image quality negatively - Notification procedure
In principle, any type of image creation is suitable- 3-chip variants (one chip each for one of the three primary colors) are better than 1-chip variants
- Reflection systems (LCoS / DLP / D-ILA / SXRD) are better than transmitted light systems (LCD)
- Larger imaging chips are better than smaller ones
- Quiet projectors are better than loud ones …
- Contrast
With current beamers there is a wide range of contrast values. However, one must note that the contrast is either generated natively by the display method or by a so-called adaptive aperture. This increases the ON / OFF contrast, but can be noticed by optical pumping when there are fluctuations in brightness. - Note
Actually, there is only one projector display method, which I advise against. The 1Chip DLP system unfortunately used by the majority of all cheap projectors. In this system, the image reflected by the DLP chip is steered in turn by a color wheel. This rotates very quickly and thus the three primary colors are projected “unnoticed” one after the other onto the screen. However, since our eyes cannot move smoothly over a surface, but only gradually, around 20% of all viewers experience a rainbow effect. Anyone who has seen this effect once will see it again and again. This effect is worse than a dead pixel in the middle of the computer monitor. The manufacturers try to counteract this effect with an even higher rotation speed and more colors on the color wheel, but this does not cancel out the effect but only minimizes it
Conclusion: Which projector you choose is determined by personal preferences, specifications at the installation site (interchangeable lenses) and the size of the wallet. I recommend everyone to take a closer look at this WEB portal. The top 10 of the various price categories are listed there (Projector Central). You will also find the current market prices and all projector computers that show the basic parameters of the list