Posts Tagged ‘Image Projection’

The Advantages of a Digital Light Projector

February 3rd, 2010
Vincent Woodall asked:


Are you looking for an image projecting solution for your home or business? Digital DLP projectors employ an image-screening method that is rapidly gaining popularity and is becoming renowned for its quality and reliability.

Looking to create the ultimate home entertainment system? Invest in a digital DLP projector to screen all your movies at home, in state-of-the-art surroundings.

Regularly give presentations, or running a business or organisation that requires the frequent use of high quality projection equipment for conference or training events? Digital DLP projectors are lightweight and operate at low noise levels and are currently placed at the very forefront of image projecting technology.

Digital DLP projectors use a relatively new image projection technique, known as Digital Light Processing (DLP) that has been in existence for about 20 years.

The new image projection technique was invented in 1987 by a technical specialist called Dr. Larry Hornbeck, who was then working for Texas Instruments.

DLP is another way of projecting digital images onto a screen and, since the invention of the technique in 1987, a great deal of work has gone into preparing the process for release into the commercial market, where it is now beginning to compete against other 21st century image display techniques, like LCD, plasma screens and high definition television.

DLP works by projecting an image through a complex matrix of a large number of tiny mirrors. The number of mirrors that your particular digital light projector contains will dictate the resolution quality of the image that is projected.

As DLP technology has improved, smaller, mass-market digital light projectors are becoming available for use in the office or home. These high-quality image projection devices make excellent additions to a home entertainment system and are handy tools for presentations and corporate screenings, as well as being a great additional piece of equipment for any educational establishment.

DLP technology works as both front and rear-projected, so digital light projectors are available as stand-alone units and also as box units that are fitted with a rear projector and include a screen within the box ‘ making it one handy image-screening unit.

The advantages of a digital light projector are manifold, with the best advantage considered to be its superior image projection quality, producing images on even the largest screens of a quality and clarity that has never been seen before.

Digital light projectors produce shake-free images and their light source is replaceable, which gives them a longer product life than other image screening options available on the market.

So, how can you benefit from this rapidly-advancing new technology and install a digital light projector in your home, office or educational establishment? The Nobo range of digital light projectors scores highly for image resolution quality and contrast and offers exceptional brightness. The Nobo range is easy to use, lightweight and portable and has been designed with entry-level operators in mind.



Digital Projector – Give A Bigger Picture

January 26th, 2010
Namsing Then asked:


Digital projectors are those video projectors which are used in conferences for presentations. The digital projectors receive video signals from, usually, desktop computers and display images on large screens which can be easily comprehended by all in the gathering.

Two Types of Digital Projectors To begin with, there are two technologies used by digital projectors, the older one being the LCD, liquid crystal display with independent transparent panels of LCD for each constituent primary color (red, blue and green.) The image transmission depends on the signal received by the projector from PC which redirects the light signals through these LCD panels and lens onto a screen. The LCD projectors look pretty similar to older slide projectors and are simple in construction and thus cost less in comparison to their successors DLP projectors. The LCD can be thought of as slides placed at the focal length of the lens making it complete. Clarity of picture in LCD projectors depends on the number of pixels it is set for. (Pixels are smallest area of data or picture holders)

DLP Projectors: The Latest of the Digital Projectors Digital Light Processing or DLP is a technology developed by Texas Instruments in 1987. DLP projectors bring in a paradigm difference in technology in image projection to board rooms. Unlike their predecessors, DLP projectors make use of tiny mirrors or micro mirrors to reflect light images to pass through the projector lens and onto a screen. Each mirror can be thought of as representing a pixel. The mirrors reflect primary colors in rapidly rotating succession as actuated by a rotating color filter wheel. The image of rapidly changing colors ‘constructs’ images for human eye perception. The micro mirrors are collectively called as DMD or ‘digital micromirror device’.

For the sake of enhancing picture clarity, the rotating wheel is provided with a plain patch which allows plain white light. This type of DMD projectors are also known as single chip projectors. The three chip projectors are a bit complicated but offer better clarity. Here a prism splits the light from lamp into primary colors which are redirected to DMD which recombines them before projecting through the lens.

Where Is the Difference DLP projectors are lighter and give far better pictures. Single chip resolves 16.7 colors while the three chip model does a, hold your breath, 35 trillion colors.

Commercial Models Texas Instruments is the pioneer who owns the patent for DLP technology. Fraunhofer Institute of Dresden of Germany developed the same technology simultaneously and markets it as Spatial Light Modulators. HP, Samsung are other market leaders in both LCD and DLP technologies.