1. Introduction
As environmental awareness increases, people are increasingly using bicycles rather than cars, motorcycles or other fuelled vehicles to travel short distances. Numerous people ride bicycles on the road as their main leisure activity. Today's roads also have dedicated road cycling lanes. Bikes are unlike other form of conveyance, because they only have faint lights. Insufficient lighting at night commonly puts cyclists in danger. In Taiwan, approximately 170 people have died from cycling accidents in the last three years. More than half of fatal cycling accidents happen at night. No traffic law requires cyclists to use sufficient lighting. The main cause of cycling accidents is insufficient lighting on bicycles at night, which causes collisions with cars.
Most bicycles have a reflecting board mounted in the rear of them, but its range is less than 30 m. When the reflecting board is covered with dust, it becomes much less reflective. Both sides of the bicycle lack lighting to warn other vehicles from perpendicular directions. Therefore, it is necessary to equip lights on both sides of the bike wheels to avoid side impact caused by other vehicles. Many wheel-based LED lights are designed to meet the requirements and many bikes are also equipped with strips of LED lights. A very bright LED strip helps other people notice the bike at night. The use of such a strip can reduce the chances of a cycling accident. Additionally, the wheels of a bicycle can be designed to display graphics or text by the appropriate colors of the various LEDS. This design does not only increase driving Safety, but also improves the appearance of the bike.
The rest of this paper is organized as follows. Section 2 surveys previous LED applications in image display. Section 3 introduces the proposed system architecture. Section 4 describes the hardware and Software of the System. Section 5 Summa