Tel: 020 7580 4990


Projection DesignThe data projector industry is vast and the range of products available often bewildering. Rockport Presentations offer a consultancy-based approach designed to help you select the projector best suited to your needs and budget.

We have no ties with any single brand, so our advice is impartial. We supply the highest quality projection solutions from a range of manufacturers, including Epson, Projection Design, Infocus, NEC, Sanyo, Sony and Toshiba.

How do data projectors work?

Data and video projectors fall into one of two categories: reflective or transmissive. They are further defined by the type of projection technology they use:

  • LCD projectors (Liquid Crystal Display): Transmissive
  • DLP projectors (Digital Light Processing): Reflective
  • LCoS projectors(Liquid Crystal on Silicon): Reflective

LCD projectors incorporate a lamp focused onto three small LCD panels. The white light from the projection lamp is split into three colours: red, green and blue. The separated coloured light passes through an individual poly-silicon LCD panel, then combines with the other colours before being focused on the screen. The projected image is created from a matrix of pixels, each of which incorporates a tiny liquid crystal. Colour saturation and intensity are determined by the degree of light allowed to pass through the LCD panel.

DLP projectors utilise a Digital Micromirror Device (DMD) – a semiconductor chip made up of thousands of microscopic mirrors. Each mirror represents one pixel, so the resolution of the projected image corresponds directly to the number of mirrors used to create it. DLP projectors create colour in two primary ways: single chip and three chip.

Single chip systems reproduce colour by placing a spinning colour wheel between the projection lamp and the DMD. The DMD chip is synchronised with the colour wheel so that each of the colour components is displayed on the corresponding coloured section of the wheel as it passes in front of the lamp. Red, green and blue images are displayed sequentially as the mirrors are switched on and off at high speed to generate the projected image.

Three chip systems use a prism to separate the light from the projection lamp into the three primary colours: red, green and blue. The light is directed on to three DMD chips, one for each colour, then recombined and passed through the projector lens.

LCoS projectors incorporate a micro-display device similar to DLP projectors, except liquid crystals are used instead of mirrors. The liquid crystals are applied directly to the surface of a reflective silicon Complementary Metal Oxide Semiconductor (CMOS) substrate, on an array of aluminum mirrors that define each pixel. Voltage applied to a pixel causes the liquid crystal to change direction, which also changes the polarisation direction of the incident projection light.

Please feel free to contact us for further information on data projectors.


  • Projectors are portable for laptop presentations on the move
  • Projectors can be fixed to the ceiling or rear for multipurpose use, such as laptop presentations, PC, DVD or Sky television

Rockport Presentations services

  • We install front and rear projection systems
  • We connect projectors to full AV systems in meeting rooms
  • We maintain projectors and replace projector bulbs
  • We install projectors in London and across the UK
  • We hire projectors