OLED显示器封装技术在车载应用中的可靠性

Reliability of OLED display encapsulation technology in automotive applications

有机发光二极管(Organic Light-Emitting Diode, OLED)显示器作为新一代显示技术,相比于液晶显示器(Liquid Crystal Display, LCD)具有诸多优势,包括广色域、高对比度、低功耗和轻薄等,在智能手机、平板电脑、显示器、电视等消费电子领域对LCD已有取代之势。随着新能源汽车智能化需求的提升,显示器作为智能座舱中电子系统人机界面的最终输出单元,越来越向大屏化和多屏化方向发展。考虑到座舱内空间的限制,轻薄的自发光OLED具有明显的优势,特别是其能在柔性基材上制备的特性,使OLED显示器更加适用多形态的柔性显示方案。目前OLED显示器的车载应用较少,主要是受限于OLED器件环境可靠性较差。本文从提升薄膜封装阻隔能力、改善薄膜封装稳定性和提升薄膜封装散热能力3个方面分析了通过改进薄膜封装提升OLED显示器环境可靠性的方法,为后续OLED显示器在汽车智能座舱中的应用提供参考。

Organic light emitting diode(OLED)as a new generation of display technology,compared to the liquid crystal display(LCD)has many advantages,including wide color gamut,high contrast,low power consumption and lightweight,etc.There is a replacing trend of LCD in the field of consumer electronics such as smart phones,tablets,monitors,televisions.With the increasing intelligent demand of new energy vehicles,and the display,as the final output unit of the human-machine interface of the electronic system in the intelligent cabin,has the trend of large screen and multi-screen.Considering the limitation of space in the cabin,the light and thin self-emitting OLED has obvious advantages,especially its characteristics of fabricating on flexible substrates,which makes OLED displays more suitable for multiform flexible display schemes.At present,OLED displays are rarely used in vehicle applications,which is mainly limited by the poor environmental reliability of OLED devices.This paper analyzes the methods of improving the environmental reliability of OLED display by improving the thin film encapsulation in three aspects:improving the barrier ability,improving the stability and improving the heat dissipation ability,which provides reference for the subsequent application of OLED display in automotive intelligent cabin.