Trade Resources Industry Knowledge Three Main Display Technologies

Three Main Display Technologies

Have you ever been curious about the different types of displays? Have you ever wondered what LCD really means? Well in this brief article I am going to try and define each of the three main display technologies (I will not be including DLP technology).

LCD DISPLAY – LCD means Liquid Crystal Display. It’s what you have in your television, it’s your computer monitor and if you are old enough to remember mood rings, it’s that same technology. Remember mood rings?! Ok, back to my lesson :). There is a light in the back of the screen that makes the screen brighter…a back light, if you will. In 3LCD projectors, this beam of light hits mirrors (think of a prism). When this light hits the mirrors they break into three colors RGB (red, green and blue). These three colors pass through a liquid crystal display which has teeny pixels. The light passes through these screens in the same RGB colors. This light passes through the projector lens and onto the screen. However, on the screen we see full color, not the RGB colors that the light reflected inside of the projector. This is due to the prism effect. It’s good information to have if you’re trying to sell a projector to a client. It’s important to understand and be well acquainted with your product.

LED DISPLAY – LED means (Light Emitting Diode). Most people associate LED technology with those brilliant digital display screens along side the freeway distracting traffic. LED is synonymous with BRIGHT. LED technology can also be remembered by the clocks we used to have in our home (or still do), with huge, bright, glowing digits. Or even on our television remote controls. In this technology, a pixel has a RGB (red, green and blue) elements and when they are on at the same brightness, they are very bright! I love LED’s. I love the brightness, which is their greatest asset. LED’s are basically bulbs, small bulbs that fit into a socket, like incandescent light bulbs. What’s the difference? Well LED’s are really bright, they are not hot upon touch and they last for thousands of hours; they don’t have the filament that will burn out like ordinary light bulbs. Another great quality about LED’s is they can compete with that brilliant, luminous star…the sun. Just remember for LED’s…brightness and longevity.

Plasma DISPLAY – Plasma is a gas with ions and electrons. When there is current running through it, the ions and electrons get all excited and run toward each other or rather bump into each other. In all this excitement, they produce protons, phosphorous and ultimately, color. Things to remember about plasma screens – they can not be repaired. Once they are gone, that’s it. Images on a plasma need to be moving continuously, which is a down side. An upside is they produce better contrast and could be less expensive.

Source: http://www.led-search.com/news-view-3993.html
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Defining Video Display Technology
Topics: Lighting