What is Projector and how does it work?
what is the projector? You may have seen projector being used in your class, or in a government function, nowadays people even use Projector at weddings, to refresh nostalgia. But do you know what this video projector is?
How does this projector work? What are its different types? If you want to know the simple answers to all these questions, you must read this article till the end today. Because today we're going to share with you all the information about Projector.
Now are the days when classes were filled with blackboards, quotations, maths equations, and science diagrams. Teachers needed to use chalks and write again and again to explain to a concept.
Sometimes so all things in these blackboards cannot be explained properly. In such a situation, teachers can easily concentrate with the use of Digital projectors and explain students better concepts everyone. This will now enable teachers to teach seamlessly students without using any chalks which used to have a long wastage earlier.
getting too much time can students ask all your doubts. so today i thought why don't you guys be informed about what a projector is that will make it easier for you to understand it. so let's start without delay.
What is Projector (What is Projector in Hindi)
Tell Projector in easy language then it is a device that uses one series of chips, lenses, color wheels and various other gadgets and gizmos that takes and replaces one beam of light with great high definition detail in your favorite movies and TV shows.
a projector is a optical device that project a image or moving images over a surface, mainly a projection screen. the most common type projector today is the video projector.
We can call Video projectors digital replacements the first type of projectors such as slide projectors and overhead projectors.
who invented the projector and when?
Projectors was invented by Charles Francis Jenkins in 1894.
there is nothing in common in today's projectors and in old projectors. where in earlier original models light were blast by celluloid film and images and sounds were string together, use some techniques that are not yet used.
Both the design and the implementation of the Modern projectors have a very complexiety, using a lot of different core technologies that provide a huge range to a prospective buyer.
types of projectors
There are many types of Projectors but three of them are the most important.
1. DLP
2. LCD
3. CRT
What is DLP Projection
DLP technology based is a optical semiconductor called a DMD chip (Digital Micro mirror Device) by Texas Instruments in 1987. A DMD Chip are made up of many millions tiny mirrors, which rotage in 10 degrees angle (they are also 12 Degree in better models).
In a DMD chips, shade are often extra and are control using a shade controls. They are controls in which they rotates, round complete, which can range from about 150x each second to 250x or even more.
A lot of affordable products can be created using several message shade controls. It can be either Red/Green/Blue any colour, but often it is a clear message.
What is the Advantages of DLP Projector
1) It contains Filter-free design.
2) These are Sealed projection system.
3) It has no problems of failed air filter.
4) Higher contrast occur.
5) Less pixilation
are 6) Lighter and smaller.
What is the Disadvantages of DLP Projector
It may show Rainbow effect, Color wheels sometimes rainbow effect produce. Rainbow effect (also known as color separation artifacts), these are momentary flashes of banded color that look completely like rainbows (rainbow). These are randomly occur, and they only last for a few moments.
These problem appear mostly in slower color wheel projectors. These rainbow artifacts problem are never visible in 3-DLP chip projectors as it uses 3 single DLP chips technology.
what is lcd projector
LCD projector is the video projector of a type used to show displaying video, images and computer data in screen or in other flat surface.
it is the modern version of slide projector or overhead projector.
To Images display, LCD(liquid crystal display)send projectors typically light by one prism metal-halide lamp or by a series dichroic filters that separate that light in three polysilicon panels – one for red, the other for green and the third for blue components of video signal.
Why polarized light pass gets through these panels (which polarizer combination, LCD panel and analyzer), individual pixels can be open to allow light or to block close light.
these open and closed pixels combination can create a wide range colors and shades in projected image.
What is the Advantages of LCD Projectors
1. Higher contrast ratio occurs in specific projector models.
2. Sharper image occurs in specific projector models.
What is the Disadvantages of LCD Projectors
1. Having Low contrast ratio, design equipment, in which they are equip from high-quality optics.
2. there are High-weight.
3. Dust blobs Impurities are in panels. So LCD structure projector must be cleaned every 300 hours after it is used.
4. Color decay occurs.
5. It shows Limited lifetime Screen door effect, it occurs when the lines visible between the pixels is formed, which causes separate pixels visible, and these effect become more distracting.
6. It contains a lot of Dust issues. With this dust accumulation, contrast ratio may see a decline in over time by up to 50%.
7. Having Dead pixels. Which you must have heard in LCD Monitors.
What is CRT Projector
CRT Full Form is"Cathode Ray Tube". It is the largest and most commonly used projector. Many of you must have seen this projector in the auditorium of school, or in Bars. CRT utilizes three tubes, also known as "guns.". They make image by three colors combine and converge.
CRTs do not have fixed number pixels, which makes them a versatile machines and that capable from higher to lower resolution sources to create clear images. running a CRTs requires periodic 'calibration' for a trained professional, which is a additional expense end user.
These projectors are fixed installations because of their size generally. CRTs are not very bright like another technologies, but it is very difficult to beat what refined picture quality provides a properly calibrated CRT.
that's where it costly more parts, especially the guns that costs a lot of money to replace.
What is the Throw Distance of the projector?
The throw distance of a projector is the distance that is within the image of projector and Screen (i.e., the distance as far as image can be "thrown").
What is Projection Screen?
a projection screen is called a installation where one surface and one support structure are used to display a projected image which is finally seen by audience.
Projection screens is either permanently install, such as in movie theater, or on the tor of semi permanent, as if placed in a conference room.
There are many variety of Projection Screen such as digital projectors, movie projectors screen, overhead projectors, slide projectors etc.
But the basic idea in all screens is the same as that of: Front projection screens works in diffusely reflecting the light that is project over it works back projection screens, by them in transmit diffusely light.
which projector is good to buy?
Well so many of the Projector are variety to buy. But some of them are better than they are with more functions than there are some that do not have much features. So below I've made a list of some best projectors that you can buy online if you want.
- JVC DLA-X5900
- Sony VPL-VW300ES
- Optoma HD39Darbee Special Edition
- BenQ W1070+
- Optoma UHD65
Which does the projector look Lens?
Convex Lens is used in Projector. Both of these are outerwards curved from sides. This magnifying lens is also a convex lens actually. When light pass, you can get a image screen that is much larger than the object it image. That's what it's Image Inverted.
therefore, these inverted video or image are released within the projector and which is later project inverted in a screen. so we see finally image straight.
what is used in projector education
Projector have many benefits, but they are most commonly used in education, which means they are used the most in the field of education. Let's know how they are used.
As we know, the time is technology, the use of Laptops, Smarthphones and computers is known to almost everyone.
How can Education sector lag behind? Yes, friends, projectors and smart boards are now being used to make studies more interesting in classrooms. Let's learn more about their use.
Note-taking can be done in a more Efficient way
earlier, where it was not so easy for children to concentrate in studies and to write note together, now notes is present in a better interactive way with the use of projectors. moreover, after the class is over, teachers can share the e and copy of those notes with students.
this gives them the right notes at the right time, reducing the risk of making mistakes. moreover, children can focus more on understanding things where they can do it in a more focussed way.
Studies can be made more Interactive by Presentations that keep Students more Engaged
we all know that we remember the story of movie better in exchange for the theory portion of books. the only reason for this is presentation. similarly, if concepts is explained through interactive videos, it is more remembered in children.
at the same time, their interest increases considerably. this keeps them remembering their studies for longer periods of time.
Lessons can be taught through Games
Nowadays, there are so many puzzles and Quizes on internet that can be used for children's education. Putting Education Puzzles in front of students also remembers their subjects and they are not bore by having projector. It also teachers can discuss or quiz the questions of your subjects.
Can be taught from Mediums different Range
young children don't understand the whole topic. therefore, if the same subject is divided into small pieces, they remember it more.
turn on the slides already prepared through projector and the related tasks or exercise of a subject can be done in a interactive way after reading its small portion. this will increase their spirit of studies as well as team work.
Classroom Time is used correctly
often the earlier education system had more wastage of classrom time. because teachers had to write notes, erase it and rewrite some new topics, there were no doubts clear students. since the arrival of the same projectors, time has not to be wasted for these worthless tasks so that students can read better.
what you learned today
I hope I gave you people a full insight into what the projector is (What is Projector in Hindi) and I hope you guys understand what projectors are.
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