Understanding The Differences Between LED, LCD and DLP Projectors

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LED vs LCD vs DLP Projectors
Projectors can be classified by the technology used to project the content. Projectors can be used in colleges, at home as a home theatre as well as to play games. An impressive big screen can be used to entertain your guests as well as to make the visual more appealing. Large screens at sanctuaries and church projectors with more Lumens are used to show content to a large gathering. There are also gaming projectors available specifically for gaming purposes.

This article is going to talk about the different kinds of projectors and the pros and cons of each.

DLP Projectors

What does DLP mean? DLP means Digital Light Processing.

A DLP Projector uses the technology of Digital Light Processing. In layman terms, there is a chip called the DMD or the digital micro-mirror device which consists of more than two million tinier mirrors. These tiny mirrors can move towards or away from the light source, to direct the light towards an image. It also consists of a spinning color wheel which delivers color and projects it on the screen. The light source used is LED or lamp. DLP projectors with the LED technology is easier to handle because the lamp need not be replaced, saving both time and money.

This kind of projectors is mainly used in classrooms and schools and colleges. They are less expensive compared to the other technologies and are often used as home theater projectors.

Advantages and Disadvantages of DLP Projectors

  • DLP projectors are easy to maintain since they have a filter-free and sealed chip design.
  • DLP projectors offer brilliant, colorful, clear images with good contrast and high contrast ratio
  • The final image is much sharper because of the limited space between the pixels.
  • Light loss is greatly reduced, and the light output is high because of the usage of mirrors.
  • DLP technology offers a deeper black color compared to other projectors.
  • DLP produces a smoother image which is as good as a 35 mm or a 70 mm film.
  • DLP is highly accurate with no shadows.
  • The DLP has a limited number of pixels due to the mirrored chip
  • The DLP is not as bright as LCD technology
  • It can produce the rainbow effect with brief flashes of color across the screen

Rainbow effect: The chromatic wheel or the transparent colored disk which turns in front of the lamp is divided into several primary colors, and at the end, it reconstitutes all colors to give the final color. These primary colors are positioned like the slices of pie, and there are several segments – 3 segments, four segments, six segments or even eight segments. The lesser the number of segments, the disk turns less rapidly, and the human eye can perceive the colors better by breaking it down. Thus, sometimes what you see is like a rainbow, especially the portion of the image which is lighter in color.

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LCD Projectors

A technical difference, a projector is called an LCD projector if it used the technology of liquid crystal display.

There are two types of LCD projectors. A 3-chip LCD projector as well as a single chip LCD projector.

The LCD which contains three separate glass panels – one for red, green and blue components of the image that is being sent to the projector. As the light passes through the panel, individual pixels open and close to allow light to pass or close to block the light depending on the image.

There is another type of LCD, called 3LCD.

What is 3LCD? This modulating action by three separate glass panels is called 3 LCD.

LCD Projectors have the following features:

  • LCD Projectors are less expensive
  • LCD Projectors have no moving parts
  • LCD Projectors with a single chip work well with customers on a budget
  • LCD Projectors with 3-chip have better color saturation and lower noise levels
  • LCD Projectors are good for watching movies
  • LCD Projectors require constant filter maintenance and produce less contrast output
  • The LCD projector is more light efficient.
  • The LCD projector has a good color saturation.
  • LCD projectors produce a brighter image with the same wattage and have high brightness capabilities.
  • LCD projectors producer a sharper image which is more precisely focused.
  • LCD projectors score higher when it comes to the brightness, an essential projector feature
  • 3LCD projectors will provide a beautiful color in clearly defined images even in a bright room.
  • It is bulky since it consists of too many internal components and is difficult to carry around.
  • LCD projectors often develop ‘dead ‘ These pixels can either be on or off. A permanently off dead pixel may not cause a much noticeable difference, but if there are too many dead pixels, then it will cause a hindrance to the projector.
  • The LCD can fail fast, and the parts are expensive to replace.
  • LCD projectors cause the image to look heavy with pixels.
  • LCD projectors lose image quality over time.
  • Color uniformity is lower than DLP

LED Projectors

What is LED technology?

An LED is nothing but a light emitting diode. It is two lead semiconductor source of light. LED’s are solid state devices that convert electric energy directly into the light of a single color.

An LED projector has the following features:

  • The LED’s in the projector have a lifespan of over 20000 hours
  • LED projectors have negligible maintenance cost
  • LED projectors have lower power consumption
  • LED projectors have better colors
  • No color or image degradation: LED technology, processes high-quality images and there is no deterioration in the quality of the image and color
  • There are no maintenance costs on LED projectors, and there are no dust filters to replace
  • Instant on/off – The LED projectors can be turned on or off instantly since there is no waiting time for a bulb to cool down or no need to pay extra attention to increase the shelf life of the bulb.
  • Environment-friendly – there is no mercury inside the LED projectors, so it is not difficult to dispose of.
  • Cool Light: LED’s radiate very little heat that can cause damage to sensitive objects.
  • Small size: LED’s are small in size and are very compact.
  • Voltage sensitivity: LED’s must be applied to the voltage above the threshold and a current below the rating for the projector to work perfectly.
  • High initial price: LED’s are currently more expensive, and the initial investment is greater than other technologies.
  • Blue light pollution: Cool white LED’s emit proportionally more blue light than conventional light sources such as incandescent lamps or sodium Thus, it can cause more light pollution than other sources.
  • LED lights do not approximate a point source of light. So LED’s are difficult to use in applications requiring a spherical light field because LED’s are not capable of providing divergence below a few degrees.

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