Nothing better than using a video projector during a professional presentation. To choose yours, the contrast and the brightness of the image, the weight, and the focal length are the essential criteria to take into account.
For the comfort of your interlocutors during a professional presentation, the use of anoutdoor daylight projectoris much more convenient than simply using a computer, even with a large screen. And this with the key, most of the time, a quality of image more important than that of the pico-projectors, these miniature projectors that we presented to you in images here. The choice of material is, as is often the case for computers, mainly conditioned by the use you make of it.
In addition to our selection in pictures, here are 10 criteria to make your choice.
- The sensor
Two main display technologies share the market: the LCD (liquid crystal technology, from which the Tri-LCD derived) and the DLP (video projection method developed by Texas Instruments).
If the DLP is particularly bright – allowing presentations even in low-light environments – the Tri-LCD is often quieter and a little less expensive. But the differences both in terms of quality and price tend to decrease sharply in recent years.
As for LCOS (Liquid Crystal on Silicon), this technology is mainly proposed for Canon projectors.
- The contrast
The ratio between the brightness of an illuminated point and that of an extinct point is one of the battle horses of the manufacturers of outdoor daylight projectoras well as those of the LCD televisions. Count at least 1,000: 1, but do not hesitate to aim at models offering a contrast of 2,000: 1 or 2,500: 1. The ratios even reach 4,000: 1 to 10,000: 1 for high-end models.
- The brightness
The darker the room, the better the image of the projector. However, the higher the number of lumens (value that can measure the brightness), the more we can afford to project in a bright room. 1,000 lumens is a minimum, from 1,600 lumens, comfort is assured. The more you project a large diagonal image, the higher the brightness criterion.
- The resolution
While it makes a real difference in image quality for corporate movie projection, high definition is less essential when presenting business documents. The resolution must be equal to or greater than the resolution of the image you want to display. Thus, if a resolution of 800 × 600 SVGA (Super VGA, display standard whose definition starts at 640 × 480 pixels) was sufficient for a DVD or a simple PowerPoint presentation, a resolution of 1024 × 768 pixels (so-called XGA) will be more suitable for a richer computer screen display. It is the most commonly adopted format in business for versatile uses.
It all depends on the devices you need to connect. A VGA jack will broadcast the image from your PC, S-Video, Composite and Yuv inputs are for the DVD player or VCR. A USB port can also be practical. For high definition, check that the unit has an HDMI jack. Finally, some projectors now integrate WiFi to avoid wired connections.
- The life of the lamp
The lamp, consumable costing between 75 and 200? Must be regularly changed. The life of the lamp is generally announced by the manufacturer: it is commonly between 1,500 to 3,000 hours. Note that some projectors include Economy modes to extend the life of the lamp.
- The noise
This comes in particular from the fan. This is one of the criteria to which the builders have been much attached. If the focus on silence is more present in personal projectors, a real effort has allowed these professional devices to maintain around 30 decibels.
- The focal
Before choosing the model, you must have clearly identified the room where the projector will be used and the recoil you have. Short-throw projectors make it possible to be closer to the projection screen, the classics will obtain an image of 2m base if they are installed at 4 meters, while the projectors with long focal length will be reserved primarily for the dedicated rooms.
Smaller video projectors weighing less than 2kg are more practical for itinerant professionals, but they are generally less efficient, both in terms of image quality and size as well as from the point of view of the importance of noise. They are also often more expensive.
- The price
The range of price of the projectors depends on your expectations in terms of quality. For occasional and office uses, you can find devices under $ 500, but for regular use, it is better to invest in robust and efficient equipment, around 1.000. For high-definition screenings in large theaters, the acquisition can reach several thousand euros.