Advanced methods for safe visualization on automotive displays. Issue 6 (29th April 2020)

• Record Type: Journal Article
• Authors: Axmann, Benjamin; Langner, Frank; Blankenbach, Karlheinz; Vogelmann, Matthaeus; von Gaisberg, Adrian; Strobel, Lukas; Bauer, Jan
• Is Part Of: Journal of the Society for Information Display. Volume 28:Issue 6(2020)
• Page Start: 483
• Page End: 498
• Publication Date: 2020-04-29
• Subjects: automotive -- Camera Monitor System -- LCD -- monitoring -- safety -- video; Information display systems -- Periodicals; 621.38154205
• DOI: 10.1002/jsid.909
• Languages: English
• ISSNs: 1071-0922

Abstract

Abstract: Camera Monitor Systems (CMSs), for example, for backup cameras or mirror replacements, become increasingly important and already cover safety aspects such as guaranteed latency and no frame freeze. Today's approaches deal only with supervision of the digital interface, LCD backlight, and power supply. This paper introduces methods for advanced safety monitoring of panel electronics and optical display output that aim to enable future CMS based automotive use cases. Our methods are based on correlation of physical measurements with predicted values derived from a corresponding display model. This model was made via calibration measurements and many test patterns. Correlation of the monitoring results with predicted values corresponds to the probability that the RGB data are shown as intended. This implies that an overlying system, an Automotive Safety Integrity Level (ASIL) Prepared Video Safety System (APVSS), ensures that only safety verified RGB data are provided to the panel electronics. In case of failures, our methods enable a safe system state, for example, by deactivating the panel. An additional challenge is to allow graceful degradations, a safe but slightly degraded image may provide a better customer experience compared with no information. We successfully verified our approach by a fully functional prototype and extensive evaluation towards "light‐to‐light" (camera to display output) supervision. Abstract : Automotive Camera Monitor Systems, such as rear‐view and side mirrors, are becoming increasingly important and must fulfill high safety requirements. Today's ASIL safety approaches deal just with the supervision of digital data and panel voltages. This paper introduces new methods of advanced monitoring of panel electronics and optical output; these measurements are correlated with images/video to be displayed.