21 May 2018 Flexible and highly segmented OLED for automotive applications
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Abstract
Today OLEDs are established light-sources for automotive rear-lights. OLEDs having a small number of segments can be found in various cars and are about to spread further. Beyond this state-of-the-art OLEDs being flexible as well as featuring a higher number of segments are desired by OEMs. Unfortunately conventional display approaches like passive and active matrix displays are struggling to deliver the high luminance and fill factor required for automotive applications and are therefore unable to fulfill the requirements by the automotive lighting industry. In this work we are going to present our approach on flexible and highly segmented OLED applications for Automotive to overcome this problem. An investigation of a novel device concept is demonstrated, as well as details on our substrate technology development, encapsulation and electronic/driving schemes. A strong focus has been put on the possibility to use standard lithography for substrate creation to have, if possible, no impact on existing supply chains and a maximum of reliability due to the use of well-known processes. The core concept for flexible and highly segmented OLED devices is derived from this processes. Challenges that occurred during the manufacturing of the substrates and devices are described in detail as well as solutions to circumvent these unexpected problems. Measurements of OLED key parameters are presented together with visual impressions of the devices. Driving schemes and electronics needed to control the OLED segments are introduced in short to complete the study of the overall concept of flexible and highly segmented OLEDs for automotive applications.
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Hermann Bechert, Hermann Bechert, Sebastian Wittmann, Sebastian Wittmann, Christoph J. Brabec, Christoph J. Brabec, Thomas Wehlus, Thomas Wehlus, } "Flexible and highly segmented OLED for automotive applications", Proc. SPIE 10687, Organic Electronics and Photonics: Fundamentals and Devices, 106870Q (21 May 2018); doi: 10.1117/12.2318442; https://doi.org/10.1117/12.2318442
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