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LED screens and LCD panels of outdoor advertising market

For years the company Espri has been developing a working solution for outdoor LCD panels, and the presentation by Director of Operations Mr. James Brenner focused on the ways to adapt LEDs to operate in harsh outdoor conditions. The two main projects that the company is proud of are the network of escalator LCD panels in UK tube and London bus stop panels for Clear Channel. Both projects use the new product called Street Bright Panel that boasts enhanced brightness.

Any LCD panel brightness of less than 2 200 cd/sq. m. is insufficient for outdoor application. But Esprit Digital offers a 65 inch Street Bright outdoor LCD Panel with up to 3 500 cd/sq. m brightness which works well even in direct sunlight. It becomes possible to achieve such high brightness only with specially designed LED dynamic backlighting system (that has to be recalibrated every 18 months to maintain original LCD panel parameters). Naturally, such brightness comes at a price.

The LCD panels are power-hungry consuming nearly 3 kW of energy. This in turn creates power dissipation problems that the company is fighting on all fronts. The possible solutions include:

  • efficient fans that create a vortex cooling within LCD panels;
  • using correct metal alloys with better heat transfer ratio than stainless steel;
  • using 95%-efficient power supplies that generate the minimum heat within the LCD panel;
  • monitoring LCD panel brightness to avoid overheating.

With Street Bright Panels being only 60 mm in depth this is a formidable challenge. To stay ahead of the competition the company came up with the “green advertising” solution that helps to save 40% of energy by using solar panels and ambient light sensors that adapt LCD panel brightness to actual street brightness levels. This new product by Esprit Digital shows the right measure of ingenuity and creativity in search of solutions for outdoor advertising screens operated in tough outdoor conditions.

Outdoor LED screens

Founded in 1968, the company DK went a long way to become an indisputable leader and the largest manufacturer of Digital Out-of-Home LED screens. The presentation gave a brief outline of company’s current products and projects and touched upon future developments in the area. The wide range of Daktronics products includes LED screens with as tight pitch as 3 mm and as wide as 89 mm.

However, the outdoor applications traditionally start at 10 mm, with 16 mm and 20 mm being the most popular and economical. Some projects quoted during the presentation include:

  • McDonalds 16 mm LED screen in Piccadilly Square (London);
  • a 20 LED screens network for JCDecaux (in London) based on economical return-on-investment 20 mm solution;
  • the largest LED screens in the Times Square (New York) with different pixel pitches from 16 to 32 mm;
  • a well-known Crushed Coke Can LED screen built with concave and convex 16 mm LED modules;
  • as well as a recent Bucharest cascade of 20 mm LED screens.

However, it was not the projects that the presentation was focusing on but the essential message that Daktronics is all about turn-key solutions. With in-house capabilities for design, manufacturing, installation and servicing, the company offers its clients a free consultancy service at the earliest stages of the project. A competent project management from design stage to guarantee service is probably the main tool for beating the tough competition in a well developed LED screen market of today. However “the trick is not putting a LED screen in, but looking after it”.

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