OLED-LED Hybrid Rear Combination Light
Presentation of the four basic functions stoplight (top left with LED and LED lightguide), reverse light (top right with LED), turn indicator (bottom left with OLED and LED lightguide), rearlight (bottom right with OLED)
During the VISION congress in October 2014 in Versailles AUTOMOTIVE LIGHTING ITALIA Spa and OSRAM OLED GmbH showcased a hybrid rear combination lamp demonstrator featuring OSRAM’s OLED and LED technology. For the first time, the demonstrator gave a sneak preview into the future of lighting in automotive applications since the benefits of the two solid state lighting technologies OLED and LED are combined in a perfectly styled complementary setup.
The demonstrator rearlamp designed and realized by AUTOMOTIVE LIGHTING in cooperation with OSRAM utilises two different circular designs of OLED tiles. Red OLEDs lighting up in a double concentric ring structure – each ring individually addressable – and yellow OLEDs designed as broader mono-rings are used to represent the taillight and turn indicator function. The centre of both OLED types is designed as a transparent area. This transparent area enables the surprising use of LEDs for the reverse light and stop light function.
For the reverse light function six white power LEDs are placed behind the six look-through areas of the yellow turn indicator and red power LEDs are used in a similar way to create the stop light function by shining through the transparent centre of the ten red OLEDs. Additionally, LED lightguide enhancement is used for the stop light function, but also for the turn function.
Since all OLED segments and also most LEDs are independently addressable, also dynamic effects such as wiping indicators or welcome scenarios can be realized.
All in all, the prototype demonstrates that OLED features such as free shaped lighting areas, segmentation and the ability to provide transparent off-state areas can go together with LEDs in order to create completely new styling effects for rear light applications.