What are LEDs?


Characteristics of LEDs




LED(s), or Light-Emitting Diode(s), are semiconductor devices that produce visible light when an electrical current passes through them. On top of LEDs' compactness, light-weight, high visibility, and fast responsiveness, they are also long-lasting, efficient, and very safe and considerate to our environment by not using any harmful resources such as mercury. Therefore, LEDs are now known as our new most effective light source in the world.


Tokushima, the world's leader in producing LEDs

Tokushima is the region where blue LEDs were successfully manufactured for the first time in the world and now known as the world's leading region for LEDs. More than 100 LED-related companies gather in Tokushima, including the one known for the biggest manufacturer of the white LEDs in the world.

Wide Utility of LEDs

1 Familiarized Usage of LED lighting

●LED Baseline lighting/LED Down Light

[At Kenmin Hall, located on the First floor

in the Tokushima Prefectural Office]

LEDs were used everywhere mostly for special lighting devices or business purposes until the regular LED light bulbs we see today became available. Affordable residential LED lights are becoming very popular now. LEDs could be used in many more fields other than simply lighting by increasing their efficiency, mass-production, and lowering prices.


2 High Visibility and Display Quality

●LED Aurora Vision for stadiums

(824 inches)

[At Pocari Sweat Stadium

in Naruto Otsuka Sports Park]


LEDs are also used in much bigger products such as big monitor displays or signs around town, at stadiums, shopping malls or other facilities. Because of LEDs' high visibility, high color qualities, and fast response, they are used widely in outside scrolling display media for advertising as well. The Pocari Sweat Stadium, the home stadium of the J2 league soccer team, TokushimaVortis, in Muya town of Naruto, has the large AuroraVision (High Luminance LED Method) of 9.3 meters in height and 18.7 meters in width.


3 Offering a Safer Life

●LED Traffic Lights



You may have noticed some of the new LED traffic lights in towns, which you see small particles of lights in each color. Older traffic lights that used incandescent and reflectors caused pseudo lighting, in which sun light reflects in a way that some colors of the traffic lights seemed lighted when they actually weren't. LEDs' high visibility can prevent such false reading of traffic lights. Also knowing that LED traffic lights use a lot less electricity, more and more traffic lights are being replaced with LED traffic lights now. Tokushima was the first prefecture to install LED traffic lights in 1994 and have kept a well maintenance of traffic lights.


4 Application onto Vehicles

●LED Lights for Vehicles

The application of LEDs on vehicles is thought to grow large in the near future. Some cars are already adopting LEDs for their interior lights, including around speedometers, and rear lights. Future LED lights with even better quality will be used for headlights of many types of vehicles including hybrid and electric cars.

5 LED Town Lights

●LED Art Festival 2010

LED lights are also popular for holiday decorations recently due to their efficiency, bright colors, and safety of heat usage.
Additionally, Tokushima city holds the Tokushima LED Art Festival every three years. Participants from Tokushima, which include artists and students, work together to show how LEDs can artistically blend well with the nature of Tokushima.

6 Offering a Better Future in Agriculture, Forestry, and Fishery Fields

Because of their special wavelengths, LEDs are now being adopted in vegetable cultivation. The Tokushima Plant Factory Committee was set up by Tokushima prefecture to conduct further research with universities and public research and development institutes regarding how LED lights effect plants or living creatures, as well as to promote a plant factory field with the industry-academia collaboration. Also, the long-lasting LED fishing lights are used attractors in the fishing industry.

●Leaf Lettuce Cultivating

[Tokushima University]

●LED Fishing Light Attractors in cutlass fish fishing

[Southern Tokushima]


7 Helping Aids for Natural Disasters

●Independent LED Emergency Lights

[Donated to Oshima, Kesennuma city, Miyagi, by companies

in Tokushima prefecture after the earthquake]

Both battery and solar rechargeable independent LED emergency lights are manufactured now. Even without any electricity, such as during natural disasters, the LED emergency lighting devices can be solar charged during the day and have enough lighting for the night time. These LED emergency lights were donated to Oshima Island of Kesennuma city in Miyagi in April, 2011, as the island's important light source when there was no electricity after the big earthquake.