Provided is a head-up display apparatus (100) that is excellent in viewability when a display screen is viewed through a pair of polarized sunglasses, and is excellent in heat resistance. The head-up display apparatus (100) of the present invention includes: a display unit (10) configured to output projection light; at least one reflector (20) configured to reflect the projection light; a housing (30), which has an opening portion (32), and is configured to store the display unit (10) and the reflector (20) therein; a cover member (40) configured to cover the opening portion (32); and a polarizing plate (50) arranged on a housing inner side of the cover member (40). The cover member (40) has an in-plane retardation Re(550) of 3,000 nm or more. The head-up display apparatus (100) of the present invention is configured so that an angle of reflection of the projection light output from the housing (30) through the opening portion (32) with respect to a windshield is 30° or less, or is 40° or more.
本发明提供了一种平视显示装置(100),当通过一副偏光太阳镜观看显示屏幕时,该装置具有出色的可视性,并且具有出色的耐热性。本发明的平视显示装置(100)包括:显示装置(10),配置用于输出投射光;至少一个反射器(20),配置用于反射投射光;外壳(30),具有开口部分(32),配置用于将显示装置(10)和反射器(20)存储在其中;盖件(40),配置用于盖住开口部分(32);以及偏振片(50),布置在盖件(40)的外壳内侧。盖板部件(40)的平面内延迟 Re(550) 为 3,000 纳米或更高。本发明的平视显示设备(100)被配置成使从壳体(30)通过开口部分(32)输出的投射光相对于挡风
玻璃的反射角为 30° 或更小,或者为 40° 或更大。