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Types of Projectors

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    27-May-2020

    Types of Projectors

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

    In the business of projection technology, there are four main varieties including; DLP, LCD and LCOS. DLP stands for Digital Light Processing, LCD stands for Liquid Crystal Display while LCOS means Liquid Crystal on Silicon. Additionally, there are laser projectors that run on solid-state laser rather of a lamp for its light source. Different types of projectors serve different types of areas of use and have a separate range in terms of price. Thus when picking a projector, one has to be aware of their requirements and the budget they have in their mind.

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

    What is DLP Projector? 

    As we reviewed above, DLP stands for Digital Light Processing Projector which makes use of miniature mirrors that reflect light in the direction of the screen. The setup involves a physical colour wheel that spins to produce persistent colours subsequently. DLP projectors can be single-chip or three-chip with red, green and blue DLP chips.

    The light production of the DLP projectors is vibrant and highly fitting for environments with ambient illuminations like classrooms and conference rooms.

    DLP Projector: How it Works?

    DLP projector carries a chip that is built up of millions of microscopic mirrors, each of which is capable of independent adjustment. They can move towards or apart from the light source to generate light or dark pixel. To form coloured images, the colour wheel revolves in order to build coloured pixels on the screen. Thus, the colours are revealed sequentially at a high rate than a spectator sees a full coloured image. Most frequent of the systems run at up to 10x the frame rate.

    What are LCD Projectors?

    LCD or Liquid Crystal Display is a different standard technology used in projectors. LCD Projectors practice the same liquid crystal display technology that can be ascertained in televisions and monitors as well. An LCD Projector generates images using multiple complicated steps. They contain three LCD panels which cast image using the three primary colours; red, green and blue. All three of the colours are concurrently projected so that the image is completely coloured.

    LCD Projectors: How Do They Work?

    LCD Projectors use three liquid crystal displays, in which a picture is created by multiple steps. A light source transmits a beam of white light which is passed to three mirrors which are specially shaped to reflect only appropriate wavelengths of light. Each coloured light beam is sent to an LCD panel, which sustains an electrical signal. The signal commands the panel on how to adjust the pixels in the display to form the image. The identical image is presented on the three LCD panels, but in different colours due to the source light befalling on them. These different coloured images are then consolidated in a prism resulting in a single coloured image. Ultimately, the image goes through a lens ere reflecting on the projection screen.