Electrons essentially excite the phosphor compounds, causing them to illuminate so that an image is produced.ĬRT displays are also known as picture tubes.
To produce images, CRTs strike the phosphor compounds with electrons. They feature a layer of phosphor compounds, which serves as the pixel layer. What Is CRT Display?Ī CRT display is a type of display device that uses one or more electron beams to produce images. To learn more about CRT displays and why they are no longer around, keep reading. Like many other display technologies, though, CRT has since become a thing of the past. CRT, in fact, has become synonymous with old-style displays. In the past, most displays - televisions, computer monitors, etc.
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Register for the free TechRadar newsletter and stay on top of the week's biggest stories and product releases.It wasn’t long ago when cathode-ray tube (CRT) dominated the display market. Get tech news delivered straight to your inbox. Sign up for the free weekly TechRadar newsletter But once LCD prices fall, nothing will save CRT from ending up alongside cassettes, Teletypes and HD DVD in the technology dustbin. In China, Latin America, Asia and the Middle East, flat-panel prices are still too high for many consumers. The key to CRT's staying power (at least for now) is price. According to the most recent hard data from DisplaySearch, CRT shipments totalled 23 million units in Q3 2008, down 15 per cent from 2007's numbers.īut when you compare this to the 26 million LCDs and almost 4 million plasmas that were shipped in the same time period, you can see that CRT technology is still hanging in there. Worldwide, the writing is on the wall for CRT. Recycled plastics can eventually be used in a wide variety of new products such as polyethylene bin liners, carrier bags, compact disc cases, garden furniture, water butts and even fibre filling for sleeping bags. Leaded glass is reclaimed and sold on to the small Asian OEMs that still produce new CRT sets. Circuit boards, for example, contain precious metals and any steel recovered can be re-used.
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All the other components are recycled along with the plastics and metal casings."Īt the end of the process, all of the constituent materials in a CRT TV can be reused. The two pieces are then recycled in different ways to sort the glass from the chemicals.
"This is because the back is coated in lead (environmentally toxic) and the front is coated with phosphor. Here the TVs "are dismantled by hand on work benches and the main glass CRT tube must be split in two," explains David Robertson, Recycling and PR Manager for SITA South Gloucestershire. Our spokesman from South Gloucestershire told us that all TVs are sent away to the Sims Group in South Wales for reprocessing. Over at the Recycling Lives website you can type in your postcode to see where your nearest recycling centre is and what types of waste they process. "When you take an electrical item to your local SORT IT! Centre," a spokesperson for South Gloucestershire council told us, "it will either be sent for reuse or, if it is not in near-to-working order, for recycling." Under a watchful WEEE, two things can happen. But rather than end up in a landfill, they're now being recycled according to the Waste Electrical and Electronic Equipment (WEEE) Directive, which came into force in January 2007. So what can you do with your old CRT TV if you do want rid of it? You could give it away for free, trade it in against the purchase of a new TV (if you can find a suitable offer) or try to sell it for peanuts on eBay. And these are getting cheaper all the time.
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This writer has a colossal Toshiba 2857DB, still working after 10 years, and a hardy 14-inch portable (plugged into a Freeview box) in the kitchen.īut the boom in digital TV and high-definition (PS3/Xbox 360 gaming, HD TV and Blu-ray) is accelerating the switch to newer, flat-screen models. 84 years on and the CRT TV is now a dying breed.
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