Table of content: LED screens and signs magazine in 2003
#8/2003
LEDs are still popular and improving after all these years: Part 3
There are essentially two technologies for generating white light from LEDs. One way is to mount a red die, a green die, and a blue die very close together within a package, and mix the light outputs in the correct proportions to achieve white light. The problem with this approach, ignoring the technical issues of setting the correct LED drive levels, is the cost of 3 dice.
#7/2003
LEDs are still popular and improving after all these years: Part 2
The electrical behavior of LEDs is similar to other semiconductor diodes. The forward voltage is higher, and is different for the different materials used for different colors. The forward voltage rises with current, and falls with temperature by about 2mV/°C. And, like all semiconductors, the LED must be derated at higher operating temperatures.
#6/2003
LEDs are still popular and improving after all these years: Part 1
This article discusses a 35-year-old display technology that itself has rapidly changed - the LED. This overview covers the origins of LEDs, the traditional applications, and how improvements in the technology have stimulated new applications.
#5/2003
Full color LED video banners: LED perimeter displays
Lately, full color LED video screens found one more application. They are now used not only as screens and video signs but also as full color LED video banners (LED perimeter displays) in stadiums and sport facilities. Static or rotating banners are practically useless since sport fans pay them little or no attention. LED video banners are different.
#4/2003
Assault on market: Super bright LED billboards and signs
If the informational articles of our magazine have not yet convinced you what bright future is ahead of LED billboards and video technologies, we want to offer you an interesting material devoted to current tendencies in the area of outdoor advertising and some forecasts of its development.
#3/2003
Sport scoreboards: From simplicity to sophistication
There's no question in the digital age for sport stadiums that full color, high definition LED scoreboards are an integral part of a stadium presentation. It's the first thing fans see when they enter the seating area and it’s those LED scoreboard displays that helps them remember the memorable moments of their favorite sporting events.
#2/2003
Unseen "driving" force: IC drivers for LED screens
The world is full of companies producing full-color LED screens, large and small, good and not so good. However only a handful of companies is really involved in developing new systems, improving image quality and designing new models. The majority of manufacturers are satisfied by cloning and reselling the existing LED screen systems.
#1/2003
Out of streets to factory shops: LED display boards
LED display boards are changing the relationship between plant workers and the manufacturing process by creating smarter workers. As these LED display boards output their content, they are providing a continuous report on factory conditions, the data coming from automatic sensors and sometimes even manual input.
