High-performance color-tunable red organic light-emitting diodes for the application of an advanced adaptive rear-lighting system

ABSTRACT

Adaptive Rear-lighting System (ARS) in stoplight has been widely used in various vehicles to catch following drivers' attention with special information about light brake, heavy brake and slamming brake, which greatly improves traffic safety. However, most of the existing vehicle ARS usually employ multi light source, leading to complicated layout, circuit and bulky module and high current drain, resulting in high cost. Recently, ARS based on organic light-emitting diodes (OLEDs) as single light source has attracted attention as a competitive alternative to the conventional ARS. The OLEDs are known for their lower lost, environment protection, broad adjustability and color range, lightness and simple product process. Herein, we designed an advanced ARS based on single OLED module, automatically adjusting the color of stoplight among light red, pure red, deep red in accordance with light brake, heavy brake and slamming brake, respectively. This novel ARS for a vehicle stoplight includes the brake pedal assembled with pressure sensor and an OLED module.

KEYWORDS:

• Adaptive rear-lighting system
• organic light-emitting diode
• single light Source
• stoplight