projector is an output device that takes images generated by a computer or Blu-ray player and reproduce them by projection onto a screen, wall, or another surface. In most cases, the surface projected onto is large, flat, and lightly colored. For example, you could use a projector to show a presentation on a large screen so that everyone in the room can see it. Projectors can produce either still (slides) or moving images (videos). A projector is often about the size of a toaster and weighs only a few pounds.

Projectors have been an indispensable part of every educational institute, auditorium, seminar hall, conference room, and office for decades. Existing in a variety of forms, multimedia projectors are used for multiple purposes ranging from conducting classroom lessons, conferences, meetings, seminars and even for infotainment at times. However, different areas of application require different types of multimedia projectors. For example, in cinema halls, high-resolution laser projectors because it requires heavy-duty performance on a very large screen. On the other hand, a simple Pico projector can make do in a small classroom of around 15 students.

difference between DLP and LED projector

In the world of projection technology, there are four main types including; DLP, LCD and LCOS. DLP stands for Digital Light Processing, LCD stands for Liquid Crystal Display while LCOS means Liquid Crystal on Silicon. Also, there are laser projectors that rely on solid-state laser instead of lamp for its light source. Different types of projectors serve different types of areas of application and have a varied range in terms of price. Thus when choosing a projector, one has to be aware about their requirements and the budget they have in their mind.

In this blog post, we will discuss in details about the different types of projectors in the market, technology they use and their uses.


1.Globus Projectors

Globus Digital Projectors with projection size 0.76-7.62 metre showcases your presentations to the fullest, giving a broader view of the information you intend to convey. The contrast ratio of 22000:1 is one of the best among its peers, giving jaw-dropping picture quality and the distinction between colours.

Key Features of Globus DigitalLong Throw Projector

  • Globus Digital Long Throw Projector projects up to 1.07 billion colours, providing professional-grade quality to your presentations.
  • Supports XGA resolution of 1024×768 pixels.
  • It has a lamp life of 10,000 hours in normal mode and 15,000 hours in eco mode.
  • Globus Digital Long Throw Projector is at par with its peers in terms of brightness. It sports ANSI brightness of 3500 Lumen.
  • It has a dynamic contrast ratio of 22000:1 for a clearer difference between blacks and whites.
  • One key auto adjustment
  • Auto-detection of the input source
  • The throw distance can be extended between the range 1.19m-13.11m.
  • Supports 2 VGA inputs, 1 HDMI, and 1 audio input.
  • It comes with fully-functional remote to control the projector functions.
  • Globus Digital Long Throw Projector has 2W in-built speakers.
  • It is light-weighted and power-efficient.

Areas of Application

Globus Digital Long Throw Projector is ideal for modern-day lecture rooms and classrooms with larger areas. Usually, the long throw projectors are used in rooms that are larger in size where the projector can be kept at a considerable distance from the screen.

2.LCD Projectors?

LCD or Liquid Crystal Display is another common technology used in projectors. LCD Projectors use the same liquid crystal display technology that can be found in televisions and monitors as well. An LCD Projector creates images using multiple elaborate steps. They consist of three LCD panels which cast image using the three primary colours; red, green and blue. All three of the colours are simultaneously projected so that the image is completely coloured.

short throw projectors used in smart classroom

3.LCD Projectors: How Do They Work?

LCD Projectors use three liquid crystal displays, in which an image is created through multiple steps. A light source emits a  beam of white light which is passed to three mirrors which are specially shaped to reflect only particular wavelengths of light. Each coloured light beam is sent to an LCD panel, which receives an electrical signal. The signal commands the panel on how to arrange the pixels in the display to create the image. The same image is produced on the three LCD panels, but in different colours due to the source light falling on them. These different coloured images are then combined in a prism resulting in a single coloured image. Finally, the image goes through a lens before reflecting on the projection screen.

LCD Projectors Uses

LCD Projectors are highly used in the following areas:

  1. Schools
  2. Corporate Presentations
  3. Exhibitions and Tradeshows
  4. Home Theatres

Globus’ line-up of Multimedia Projectors includes DLP Projectors of Ultra Short Throw, Short Throw, Long Throw, and Portable Projector type. It speaks of high resolution, contrast ratio, brightness, lamp life, and long operational life. Globus Multimedia Projectors are an essential component of the Digital Teaching System that includes an Interactive Board with multi-touch support.

2. DLP Projectors?  

As we discussed above, DLP stands for Digital Light Processing Projector which makes use of tiny mirrors that reflect light towards the screen. The setup includes a physical colour wheel that spins to generate sequential colours. DLP projectors can be single-chip or three-chip with red, green and blue DLP chips.

The light output of the DLP projectors is vibrant and highly suitable for environments with ambient lightings like classrooms and conference rooms.

DLP Projector: How it Works?

DLP projector consists of a chip that is made up of millions of microscopic mirrors, each of which is capable of independent adjustment. They can move towards or away from the light source to create a light or dark pixel. To create coloured images, the colour wheel rotates in order to create coloured pixels on the screen. Thus, the colours are displayed sequentially at a high rate than an observer sees a full coloured image. Most of the systems operate at up to 10x the frame rate.

types of multimedia projectors

DLP Projectors Uses

DLP Projectors are used for the following purposes in our home, school, and offices.

  1. Used a business projector for conducting conferences and delivering presentations.
  2. Used in home theatres for displaying movies, TV programs, playing video games, etc.
  3. Used in command and control centers by telecommunications and utility companies.
  4. In classrooms and hotels for lectures and launch events.


The following projector care tips are easy to follow and will extend the life of your projector lamp as well as your projector.

  1. Let it cool. Don’t shut down your projector too fast but let the fans run for at least two minutes. These machines operate under high temperatures and the fans are designed cool down any super hot elements. Shutting down too quickly your projector’s components.
  2. Chill out. Packing up your projector while it’s still hot may cause lamp filaments and other wires to break. Let the lamp cool down before packing up.
  3. Keep it clean. Your projector’s filters allow airflow throughout the projector and prevent overheating. Clogged air filters means decreased ventilation, which means increased temperatures, which means a possible lamp meltdown or explosion. Dust and dirt also affect the image quality. Check your air filters every few weeks and keep them clear.
  4. Keep it flowing. If your projector has a permanent mounting, make sure the mounting plates don’t block the fan vent and there is enough airflow around the projector to keep it from overheating.
  5. Watch the on/off switch. Don’t be trigger-happy. Turning your projector constantly on and off creates a power surge that will make your projector wear out faster. If you do leave your projector running, make sure that it gets a two-hour rest every 24 hours.
  6. Hands off. Never, ever touch a hot lamp. You can end up with one nasty burn. Never touch a cool lamp bulb either since the oil from your skin leaves a residue on the lamp. Once the lamp heats up the oil residue will burn, creating a black spot on the lamp that shows up on the screen. A large enough oil spot can cause the lamp to shatter.
  7. Watch the lamp life. Be sure the lamp timer has been properly set so the projector will accurately track the lamp life and give you a status update in time for you to replace the projector lamp. You don’t want to be caught off guard with a projector suddenly shutting down because the lamp has run out of time.
  8. Buy Genuine OEM Lamps. Don’t be cheap. We all like to save money but generic, “compatible” lamps should be avoided because of their inferior materials and workmanship. The few bucks you save can end up costing you much more in the long run when these counterfeit lamps damage your projector and compromise your health.
  9. Go green. Try using the power saver or econo mode on your projector. The only time you’ll really need full brightness is when you are presenting outdoors. Indoor settings, particularly if the room is darker will be fine with the econo mode. You’ll reduce the heat used, lengthen the life of your lamp, reduce wear and tear on the projector and helping the environment.
  10. Read the manual. Ok—so it’s not the most exciting read but at least glance through the manual so you have a working knowledge of your projector.

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Author: refuge_2020

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