The necessary knowledge of projector selection, teach you how to choose a projector.

As the projector gradually enters the public eye, more and more netizens are interested. Today, I will popularize some basic knowledge of projectors. What should beginners know about projectors? Let's move on.

A projector, also known as a projector, is a device that can project images or video onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signals. Projectors are widely used in homes, offices, schools, and entertainment venues. Depending on the way they work, there are different types of CRT, LCD, and DLP. Pay attention to the process of purchasing the projector:

I. resolution of the projector

The resolution of the projector is expressed by multiplying the number of horizontal pixels in the picture by the number of vertical pixels. Common resolutions and representations are as follows:

SVGA: 800x600 economical office projector common resolution

XGA: Resolution for 1024x768 mainstream business and educational projector

SXGA+: 1400x1050 resolution for high-end projectors for high-end professional applications such as images

480p: Resolution for 852x480 low-end home projectors

720p: Resolution for 1280x720 or 1280x768 mid-range home projectors

1080p: Resolution for 1920x1080 or 1920x1200 high-end home projector

Uniformity

This is a concept related to brightness, the ratio of the intermediate brightness of the projected picture to the surrounding brightness, which is generally defined as 100%. The brightness of the image projected onto the screen by the projector is not completely uniform. In some places, the brightness will be higher, and in some places, the brightness will be lower. Of course, the more uniform the brightness distribution of the projector, the better.

Three. Contrast

The ratio of black to white in the projected image of the projector, that is, the gradient from black to white. The larger the ratio, the more gradients from black to white, and the richer the color.