Probably everyone loves cinema. How about the idea of always having a real cinema with you? And we are not talking about a tiny display of a mobile phone, but about a full-fledged, large screen! If you like this idea, then it is worth considering buying a bluetooth projector. In this article, I will tell you how to choose it.
Mini projectors: what to look for when choosing
Matrix type. Concerning projectors, various types of matrices are used to form an image:
• DLP – mirror matrices: affordable, compact, and with high contrast, but not too high brightness and a tendency to produce the rainbow effect in its worst form. Most of the shortcomings of single-matrix DLP projectors are eliminated in devices of the same type but with three matrices.
• 3LCD – liquid crystal matrices that are somewhat inferior to DLP in terms of contrast, but often surpass them in brightness and other parameters. At the same time do not suffer from iridescent streaks in the image.
• LCoS are combined matrices that combine the design features and advantages of DLP and 3LCD matrices. Quite an expensive solution, which, however, provides the highest image quality.
Light source and light flow
Mercury or xenon lamps, LEDs, and lasers can be used as a light source in projectors. For miniature pocket models, the last two options are best suited – as the most economical and compact, even more, expensive ones.
One of the main technical parameters of a projector. The more lumens a projector generates, the brighter the image will be for the same area. To work in a darkened room, the device is enough for 100 lumens, but if you prefer to demonstrate presentations in daylight, you will need a projector with at least several hundred lumens.
Contrast and focal length
In simplified terms, contrast can be understood as the difference between a completely white and a completely black image. This parameter plays an important role in the dark, but in light, images with high and low contrast will practically not differ.
Shows how far the projector must be from the screen to create a picture. It plays a fundamental role in two cases: if the projector is installed in a very small room (for example, in a children’s house made of bedspreads, equipped somewhere under the table). Or when, during a presentation, the speaker interacts with the image and should not block the light flux. In these cases, it makes sense to pay attention to short-throw models.
Resolution determines the clarity of the picture, showing how many points it is formed from. The ideal option, of course, is 4K, that is, 3840 by 2160 pixels, but this is expensive and such a resolution is almost never found in mini-projectors. A more realistic option is a FullHD model with a resolution of 1920 by 1080 pixels or HD (1280 by 720 pixels). In principle, the resolution can be lower – it all depends on the size of the screen and the distance from which it will be viewed.