How a video projector works - Features

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Marie-Ange Demory

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Projectors, including their parts, functions and features, have been widely used since their inception.

La need to reproduce videos, images or other types of material it has become a highly demanded action for any kind.

The education and entertainment sectors were the sectors that demanded the most projection services and many question the possibility of buying a television or a video projector.

These interactive tools are supported by multiple devices, including computer equipment.

Come: computer, smartphone, USB devices and others, for these reasons it is necessary to have one.

Main functions performed by a projector

The main function of a light projector will always be that of capture an image on the indicated surface through its lens .

All thanks to an important part of the projector called Digital Light Processor.

The Digital Light Processor is responsible image processing and automation converted to data received from the video ports of the projector.

Once this information has been decoded, through the projection of light it is captured in the lens and converted into millions of micro-mirrors, which together form the image that we are able to view.

What parts and elements does a projector have?

A projector internally has enough electronic circuitry to work, however, externally we have each of the parties that we can manipulate, these are:

Control Panel

And the physical console with which we can select the projector setting options such as image position, brightness, contrast, sharpness, etc.


The cannon is responsible for the projection and location of the image.


This covers and protects the entire interior of the projector and it is also the main section of the aesthetic design of the device.

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This is responsible for giving the power or not mechanically to the projector.


It is the entrances that allow connection between the projector and computer, camcorders, etc.

Power connector

This is the cable that allows the flow of electric current into the projector for use.

What are the ratings on the use of the projector?

Every type of projector that exists uses bright light, this is what it is projects the image onto the wall or surface where it will be captured.

Many times a projector is mistaken for an overhead projector, even if its words sound similar, this is different from a video projector, since it is inside a television and also projects an image but towards the viewer.

This is why it is important to know what classifications of video projectors we can find, which are:

CRT projector

Its acronym means that is a cathode ray tube projector, this is composed of three cathode ray tubes, each of a different color, usually they are green, red and blue, these project an image from the superimposition of the three tubes of rays.

LCD projector

This projector works on the basis of a liquid crystal display system, it is the standard product that can be used perfectly for the home.

It works like a division of light into three parts, that pass through the liquid crystal panels, which in this case are three, all green, red and blue.

In the end, in its projection, all of them the images are put together in one, which is made up of pixels.

DLP projector

DLP projectors use a technology called Digital Light Processing, patented by Texas Instruments, this technology is divided into two versions, one using a DMD Chip and a triple Digital Micromirror Device Chip.

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In the version where there are three DMD chips, which causes each pixel leads to a micro mirror, these micro-mirrors create a matrix of pure pixels, where these may or may not allow the flow of light towards the screen, as if it were a switch.

3D projector

The 3D projector is one of the latest projectors on the market, they capture images on a screen designed just for the 3D projector, making the images created by the projector wrap around and they give the feeling of being an image that surrounds us.

Types of projectors that exist today based on use

Currently in the technology market not only video projectors are being developed, but all the electronic devices themselves, causing the existence of more and more presentations and different device models.

In the case of video projectors there are different types and prices, which we can identify as follows:

According to the resolution

These projectors they are measured by the number of pixels that the projector is capable of generating, so that the higher the resolution of the projector, the better the quality of the image it projects.

Among these resolution projectors are 4K resolution projectors, par excellence the best of all in terms of resolution, as well as projectors with 1080p, 720p and WXGA / XGA quality.

According to the projection picture

Undoubtedly, the appearance of the projection image is an important factor, as this is inside the projector raised to be captured, having each of its frames well worked to project a perfect image.

The most recognized projectors of these sections are the LCDs, which let the light through, the DPLs, these reflect the light and finally the LCOS, these have sections such as transmission and reflection.

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By types of light

Even these types of projectors are usually quite used, these are classified in projectors a lamp , LED projector, Laser projector and finally the projectors with a hybrid source or better known as a Led-Laser projector.

Second lumen

In video projectors and lumens they are the measure of how much power it has a projector, how much brightness or amount of light it can emit, these projectors are positioned as follows:

Low-light projectors

These have approx 1.000 or less than 1.000 lumens, this means that the projectors are capable of producing the least power, since the greater the quantity of lumens the greater the power.

Medium brightness projectors

Medium brightness projectors they are generally the standard found on the market and the one that can be used most, have a range between 1.000 and 3.000 lumens.

High brightness projectors

These are the projectors capable of producing an impeccable brightness and quantity of light, this regardless of whether the place where it is located is not dark or open places, these projectors usually have a number greater than 3.000 lumens.

By size

According to the size of the projector, how useful it is to charge a projector will be at stake whether it is small, medium or large, among these we find from Mini and Micro Projectors, Pocket Projectors, Ultralight Projectors and Projectors of medium or large size.

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