How a Video Projector Works

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

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

The educational and entertainment fields have been the areas that have required projection services the most , and many question the option of buying a TV or a video projector.

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

Like: Computers, smartphones, USB devices and others, for those reasons it is necessary to have one of them.

Index(  )

  1. Main functions performed by a projector
  2. What parts and elements does a video projector have?
    1. Control Panel
    2. Canyon
    3. Cover
    4. switch
    5. Ports
    6. Power connector
  3. What are the video projector usage ratings?
    1. CRT projector
    2. LCD projector
    3. DLP projector
    4. 3D projector
  4. Types of projectors that exist today according to use
    1. According to the resolution
    2. According to the projection image
    3. By kinds of light
    4. According to lumens
    5. Low Brightness Projectors
    6. Medium Brightness Projectors
    7. High Brightness Projectors
    8. By size

Main functions performed by a projector

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

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

The Digital Light Processor is in charge of processing and automating the image converted into data that is received by the video ports of the projector.

Once this information is decoded, through the projection of light it is captured in the lens and converted into millions of micromirrors, which together form the image that we are able to visualize.

What parts and elements does a video projector have?

A projector internally has enough electronic circuits for it to work, however, externally we have each of the parts that we can manipulate, these are:

Control Panel

It is the physical console with which we can select projector settings options such as the location of the image, brightness, contrast, sharpness, etc.


The cannon is responsible for projecting and locating the image.


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


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


These are the inputs that allow the connection between the projector and the computer, video cameras, etc.

Power connector

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

What are the video projector usage ratings?

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

Many times a video projector is mistaken for an overhead projector, although its words sound similar, this is different from a video projector, since it is internally in 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 it is a cathode ray tube projector, this consists of three cathode tubes, each one of a different color, usually they are green, red and blue, these project an image by the superposition 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.

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

At the end, in its projection, all the images are put together in one, which is made from pixels.

DLP projector

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

In the version where there are three DMD chips, which makes each pixel lead to a micromirror, these micromirrors make a matrix of pure pixels, where these may or may not allow the flow of light to 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 precisely for the 3D projector, resulting in the images created by the projector wrap around and give the sensation of being an image that surrounds us. around.

Types of projectors that exist today according to use

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

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

According to the resolution

These projectors are measured based on the number of pixels that the projector is capable of generating, in such a way that the higher resolution the video projector has, the better the quality of the image it projects will be.

Among these resolution projectors there 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 image

Undoubtedly, the aspect of the projection image is an important factor, since this internally of the projector is generated to be captured, having each of its frames well worked to project a perfect image.

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

By kinds of light

This type of projectors are also usually quite used, these are classified into lamp projectors, LED projector, Laser projector and finally the hybrid source projectors or better known as Led-Laser projector.

According to lumens

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

Low Brightness Projectors

These have around 1,000 or less than 1,000 lumens, these means that they are the projectors that can produce the least power, since the higher the amount of lumens the greater the power.

Medium Brightness Projectors

Medium brightness projectors are generally the standard found in the market and the one that can be used the most, they have a range between 1,000 and 3,000 lumens.

High Brightness Projectors

These are the projectors that can produce an impeccable brightness and amount 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

Based on the size of the projector, it will be at stake is how useful it is to load a projector , whether small, medium or large, among these we find from Mini and Micro Projectors, Pocket Projectors, Ultra Light Projectors and Medium or Medium-sized Projectors. big.


by Abdullah Sam
I’m a teacher, researcher and writer. I write about study subjects to improve the learning of college and university students. I write top Quality study notes Mostly, Tech, Games, Education, And Solutions/Tips and Tricks. I am a person who helps students to acquire knowledge, competence or virtue.

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