Blue Ray Inventor
Blue Ray inventor
Light Tape UK "History of the electroluminescence"
Electroluminescence (EL) or the generation of light by electrical excitation light emitting phosphors have been for many years. Electroluminescent was first observed in silicon carbide (SiC) by Captain Henry Joseph Round in 1907. Ronda reported that a yellow light when a current was passed through a detector of silicon carbide. An employee of the Marconi Company and a personal assistant Guglielmo Marconi, Ronda was an inventor in his own right with 117 patents to his name at the end of his life.
The next recorded observation of electroluminescence from any was important at the time of the Second World War, although there have been several reports of work in this area during 1920 and 1030. In1936 George Destriau once further noted that electroluminescence could be produced from this time, zinc sulfide (ZnS) powder after applying an electric current to produce it light. Destriau was said to be the first to coin the word "electroluminescence" to refer to the phenomenon observed. Destriau, who worked in laboratories Madame Marie Curie in Paris (the Curies were pioneers in the field of luminescence for his research on the radio), published a report on its findings.
During the Second World War, a considerable amount of research was done in matches, in connection with work on the radar screen (which was He was later to benefit the television industry as a better cathode ray tubes). research in wartime also include work on the deposition of transparent conductive films for de-icing the windshield of the aircraft. This work was later to enable a generation of new electronic devices. In the 1950s, GTE Sylvania fired several layers, including matches EL on steel heavy ceramic plates to create lamps EL. During this period, most research focused on dust, matches the bright lights required to achieve minimum energy and with a potentially long life. research funding was reduced when it was determined that life was too short (approximately 500 hours). The first film EL thin structures were manufactured in late 1950 and Popkov Vlasenko. These two scientists found that the luminance increased markedly in EL devices when used a thin layer of zinc sulphide doped with manganese (ZnS: Mn). Luminance was much higher in thin-film EL (TFEL) devices in which the use of powdered substances. Without But these devices were still too unreliable for commercial use.
Several major U.S. companies were also conducting research on ELDs in the 1970s, including: IBM, GTE, Westinghouse, Aerojet General, and Rockwell. All these companies realized that there were potential benefits ELDs over existing LCD technology in the following areas: Contrast, multiplexing, and the angle of vision. The most important problem that had to be solved before ELDs mass production could start was to increase the reliability of the EL thin film stack. Since the devices operated at very high field level - about 1.5 MV / cm - there was a high probability that it would break, especially if there was sufficient uniformity in the stack. Sharp, Tektronix, and Lohja Corporation in Finland were able to solve this problem between 1976 and 1983 using slightly different approaches.
The market introduction in 1985 of the data grid and computers THE notebooks with screens General Sharp and Planar, respectively helped build the foundation of the infant industry of laptop computers at a time when LCDs did not have enough brightness and contrast used in commercial products. Both Planar and monochrome ELDs Sharp uses a layer of phosphorus from zinc sulfide doped with manganese (ZnS: Mn). These screens emit an amber (orange-yellow) color that was brilliant, but also pleasing to the eye.
One of the main disadvantages of ELDs in relation to liquid crystal displays (LCD) was that until 1981 ELDs were not able to display more than one color. Even after 1981, were limited in color ELDs a limited range of colors (red, green and yellow) until 1993 when a blue phosphor was discovered.
A SRS: Cu blue phosphor blue color shows improvement and efficiency was reported by Sey-Shing Sun of Planar in 1997. Planar has shown some sample prototype white Use of this blue phosphor by SRS: Cu / ZnS: Mn structure multiple layers. The SRS: Cu phosphor enable color displays which to get a wider color range.
Because the goodwill Planar to work with clients to tailor specific product applications, you can launch a premium price for products of its main competitor, Sharp. In late 1980, Planar controlled over 90 percent of the world market ELDs. Planar In spring 1995 organized a consortium to develop the next generation of high resolution and color TFEL displays. The consortium was funded by the Department of Defense under DARPA Technology Reinvestment Program achieved (PRT). The total funding for the consortium was $ 30 million, half funded by government and private companies through the consortium. Other consortium members were: Allied Signal Aerospace, computing devices Canada, Ltd., Advanced Technology Materials, Boeing, CVC Products, Georgia Tech Research Institute, Hewlett Packard, Honeywell, Lawrence Livermore National Laboratory, Los Alamos National Laboratory, Oregon State University, Positive Technologies and the University of Florida. In 1989, the Agency Defense Advanced Research Projects (DARPA) began funding projects advanced displays as part of its program of high definition systems. Call DARPA issued a broad area in that year and beyond requesting proposals. Planar won one of the first DARPA funds in 1990 and used the funds to establish a laboratory to develop ELDs color.
electroluminescent displays (ELDs) have a venerable history starting with the experiments of Captain Henry J. Round in 1907, OV Lossev in the Soviet Union, and Destriau Georges in France. Electroluminescence was mostly a scientific curiosity until the invention of thin film deposition techniques and the discovery that a sandwich of conductors, insulators and phosphorus can result in a very efficient and durable emission display. ELDs were very important in the early days of the industry of laptops and remains important in niche markets for military equipment, medical and industrial, where high brightness, speed, contrast and robustness are needed.
The increased color TFT LCD producers forced the ELD to engage in research on color ELDs with the result that by mid- 1990 had ELDs multicolor Amels market and full-color microdisplay development. In 1999 ELD industry was limited to two major players: Planar and Sharp. Planar acquired its only European competitor, the screen Finlux Oy Division Lohja (Finland) in 1990. Sharp remains committed to compete in ELDs but its main focus is on screen LCD. Most important research ELDs remains within the corporate laboratories of Planar and Sharp, but several research laboratories publicly funded and consortia have also made important contributions to the ELD technology.
The use of electroluminescence is limited to times relatively recent. The main obstacles to the effective use of IT in the past have been: low light output, susceptibility to moisture and ultraviolet rays, changing color, cost efficient production and shorter life. In recent years several improvements have been made in the manufacture of EL lamps which mostly meant the product be recognized as a modern alternative to neon lighting and cold cathode, which requires a light source clean. A light source is not a pollutant unless not glow and thus not produce glare or night vision effect. Not only that, but the EL lighting test to consume less energy, produce little or no heat and is much less bulky than incandescent lighting systems. We must also say that the improvements in EL lamps have provided greater production matches for life, microencapsulation to avoid degradation by moisture, ultraviolet light absorbers, control of color changes - Conversion dye and provides an efficient source of light energy. The technology has spread to other areas of use to ensure further development in key areas such as enhanced brightness and extended life expectancy of the matches sure to benefit. EL lamp day show a massive improvement and are proving to be a viable alternative forms incandescent lighting when the application is appropriate. The lighting has several advantages over incandescent lighting that makes it a perfect candidate for replacement in low light and night environment applications. EL provides the ability to improve night vision because it has no infrared or ultraviolet emissions. This helps eliminate glare, improves contrast and visibility, and the product is flexible and durable, more reliable, is low maintenance, offers low power consumption and is cold to the touch when is operating. It is for these reasons that the U.S. Air Force made a recommendation for the use of electroluminescent lighting for use in austere tracks and in the aircraft cabin to increase operational availability, system reliability, reducing operational and support costs and eliminate the problems caused by lighting Incandescent: examples of which have already been mentioned above. The same study of the Air Force found that the EL lighting system was easily visible from distances of up to five miles away. Light Tape ® in particular light penetrates fog, smoke, snow, fog and other normally poor visibility conditions in order to open new application areas with the product outdoors.
In recent years, some EL lighting products have been produced and are available for purchase in the Far East, a remarkably low cost. Much of the product sold however, has proven to be of poor quality and not effective, as the key component used in its manufacture, "Match" was and still may be of poor quality for the brightness and life expectancy of the products are very concerned demonstrate that the purchase of the product may be a false economy. This low-quality version of EL lighting products ultimately led to the term electroluminescence becoming synonymous, for many years, with the lower floor. How can you put a product seriously when no delivery? This is a fair comment when speaks of the cheaper versions of the product, but should not be sent to the EL lighting in general. Currently available in the U.S. lighting system is unparalleled electroluminescent provides the brightest light bulb flat in the world with a long duration. The advances in the early 2000s, were put in place while developing a new generation of TV screen (plasma). Plasma TVs are backlit with the same phosphor technology that used for lighting EL, although obviously applied differently. For this new application of technology to be viable the match had to be much higher quality, the brightest light output produced and the life of phosphorus needed to be longer than any previously developed. New research and experimentation soon provided technical progress to do exactly that which results in a new generation of high-quality match is brighter and has a huge effect extended lifespan. The progress achieved, the result of EL technology was used in the production of plasma TV one of the most sought after the reincarnations of everyday electrical products and has been a dominant product in the last 5-7 years. This development benefited greatly technology in general and what has become the product known as "Light Tape ®" in particular as Light Tape ® is the direct result of this ahead of him.
Light Tape ® is manufactured in the United States ElectroluminX to a high specification with quality raw Sylvania light emitting phosphors Honeywell systems and encapsulant. Light Tape ® is the brightest LED light source in the world. It is indeed an incredibly thin and flat, flexible, Moisture resistant bulb. Can be supplied in a range of colors and widths, in lengths up to 300 feet. Driven by specially designed power supplies, but that can be used in intermittent or constant modes of state in the indoor or outdoor.
Light Tape ® uses less than one tenth of the power and is half the price of neon and cold cathode lighting display, it is easier to install and maintain, reduce light pollution, produces no waste heat or infrared light, is completely recyclable, and uses no gas, no Mercury Glass ny. Light Tape ® with its wealth of performance, versatility, ease of application, profitability and the extremely low carbon footprint is becoming the chosen alternative, viable to more traditional forms of display lighting. (1 watt per meters in 25 mm (1 ") wide, a length of 100 meters wide, 25 mm Light Tape ® only uses the same power as a 100 watt bulb)
Architecture, Automotive, Advertising, Interior Design, Exhibitions, Events, Marina, Point of Sale, Hotels, Bars, Restaurants, about staging and entertainment areas, emergency exits and health and safety are just some of the sectors benefiting from this source of excitement, innovative light. Light Tape ® lamps are changing the thinking of a light bulb. Imagine a light bulb as thin as a credit card, available in any color, which can bend around any surface, is available in continuous lengths up to 100 meters, for indoor or outdoor, which costs only a fraction of the cost than traditional light bulbs to operate. In fact, it is the most important innovation in lighting since the invention of the bulb. For more information visit the website of Light Tape UK, including photography, animation and video galleries. Go to www.lighttape.co.uk for the latest Light Tape ® applications.
The information used in this piece was taken from the following sources: A History of Electroluminescent Displays - Written by: Jeffrey A. Hart, Stefanie Lenway Ann Thomas & Murtha - University of Minnesota (1999)
Information on the investigation of the U.S. Air Force taken from a report submitted to the Office of the PRAM Program, Division Wright Patterson Aeronautical Systems, USA, a NASA study for the Air
U.S. Electro-LuminX
Additional information: DK Hardcastle 2009
About the Author
Entrepreneur and Old School Marketer from the Barnsley, UK currently MD of Light Tape UK Limited.
For further information please contact: Mike Hardcastle, Managing Director, Light Tape UK Ltd. 7 Meadowfield Drive, Hoyland, Barnsley, South Yorkshire. S74 0QE Telephone: +44 (0)845 617 0697 Mob: +44 (0) 7899 790 669 email: info@lighttape.co.uk web page: www.lighttape.co.uk
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