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Of the Luminous flow determines how powerful the projector’s image is projected onto the screen. The lower it is, the darker the environment should be. The maximum luminous flux is indicated in the product data of the projector, but in normal operation only two thirds or half of this is often achieved. 3000 lumens and above is a very good value, even with a light output of 2000 lumens you can still use the projector in daylight. From around 1500 lumens it should at least be twilight.

LED projectors cannot match the color brilliance of an OLED display, for example. High-quality devices create around 85% of the DCI-P3 color space area that is relevant for HDR content, but often only 74% coverage is common. At least the standard sRGB color space should be fully covered.

Native UHD projectors, like those found in cinemas, are big and expensive. That’s why JVC developers chose a cheap one for home theater projectors. rise in powerdevised a trick that many manufacturers now use: they place a vibrating glass in the beam path between the DLP chip or LCD panel and the lens. Each image is thus projected diagonally offset by half a pixel, together they are perceived by the slow human eye as a quasi-UHD image.

JVC calls this technology “4K E-Shift”, DLP device makers call it “XPR-Shift”, and LCD projector maker Epson calls it “4K Enhancement”. The increase in resolution is indeed visible. Projectors with a native resolution of 2,716 by 1,528 pixels do this especially well, as a single shift is enough to double the resolution to Ultra HD. 4K projectors that run natively at Full HD resolution need more than one shift to produce a UHD image. Technically, the upscaling is now well advanced and produces a very good screen image. However, the native 4K resolution still looks sharper and more vivid.

Regardless of the lamp technology used by the projector: waste heat always arises. The size of fans required is limited, especially with compact designs – and smaller fans usually make more noise. As long as the movie sound is playing, you usually don’t hear anything, you shouldn’t sit directly next to the projector during silent movie passages. The noise level for most devices is between 30 and 40 decibels in normal mode, and of course slightly lower in eco mode. This corresponds to whisper volume or normal ambient noise. Above 40 decibels, it’s annoying.

Many projectors have built-in projectors speaker, usually two pieces with 5 or in the best case 10 watts of power. However, you should generally expect no more than an understandable message tone here. Home theater enthusiasts will connect an external sound system.

Connections for source devices such as Blu-ray players or games consoles are the same for most devices: There are usually HDMI interfaces for this, although you should pay attention to the standards here – that is- i.e. at least HMDI 2.0 and HDCP 2.2 copy protection, so you can play UHD Blu-rays and stream some content. Other elements include audio interfaces, USB, component input and LAN network connection. WLAN and Bluetooth audio are also becoming more widespread. Support for 3D content was in high demand for a while, but like TVs, it’s already outdated

If you want to mount your projector permanently, the “overhead method” is a good idea: the device is fixed using a special assembly hung from the ceiling, mostly upside down. You can then adjust this position in the menu so that the image is displayed in the correct direction. With compact devices, a tripod nut like on the camera makes sense, so that you can also mount it on a photo tripod, for example. You also need a sufficiently long connection cable. Or you rely on a wireless HDMI set for wireless image transmission – but that will cost a lot more.

At correct orientation of the image on the screen, an optical lens shift in the horizontal and vertical direction makes sense. Many home theater devices have them. You will also find a grid test image in the projector menu, which makes alignment easier. Only if there is no other option should you use keystone correction which is also offered by all devices. This function degrades the resolution and the projection appears blurry. Automatic projection alignment and focus is becoming increasingly popular, especially for mobile devices whose locations change frequently.
Throw ratio, the quotient of distance and image size, tells you how far the front lens of the objective should be from the projection surface for a certain image size. For example, with a ratio of 1.2, the distance for a 1 meter wide image is 1.2 meters. If two values ​​are given in the technical data, it is a zoom.

In the beginning, a white wall is enough for the projection, but to be able to really benefit from the quality of your video projector, it is necessary to use a better one if possible. projection area deploy. A good screen costs more than 200 euros – an integrated motor makes it even more expensive. However, with mobile projectors it can be very interesting to try completely unconventional projection surfaces, especially if the focus is on enjoyment and not image quality.

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