High color fidelity thin film multilayer systems for head-up display use

Yi-Jen Diana Tsou; Fang Chung Ho

doi:10.1117/12.253330

30 September 1996 High color fidelity thin film multilayer systems for head-up display use

Yi-Jen Diana Tsou, Fang Chung Ho

Proceedings Volume 2892, Display Devices and Systems; (1996) https://doi.org/10.1117/12.253330
Event: Photonics China '96, 1996, Beijing, China

Abstract

Head-up display is gaining increasing access in automotive vehicles for indication and position/navigation purposes. An optical combiner, which allows the driver to receive image information from outside and inside of the automobile, is the essential part of this display device. Two multilayer thin film combiner coating systems with distinctive polarization selectivity and broad band spectral neutrality are discussed. One of the coating systems was designed to be located at the lower portion of the windshield. The coating reduced the exterior glare by approximately 45% and provided about 70% average see-through transmittance in addition to the interior information display. The other coating system was designed to be integrated with the sunshield located at the upper portion of the windshield. The coating reflected the interior information display while reducing direct sunlight penetration to 25%. Color fidelity for both interior and exterior images were maintained in both systems. This facilitated the display of full-color maps. Both coating systems were absorptionless and environmentally durable. Designs, fabrication, and performance of these coating systems are addressed.

Citation Download Citation

Yi-Jen Diana Tsou and Fang Chung Ho "High color fidelity thin film multilayer systems for head-up display use", Proc. SPIE 2892, Display Devices and Systems, (30 September 1996); https://doi.org/10.1117/12.253330

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KEYWORDS

Coating

Heads up displays

Thin films

Transmittance

Reflectivity

Multilayers

Thin film coatings

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