PROBLEM TO BE SOLVED: To provide a projection member capable of improving the visibility of a virtual image.SOLUTION: In a head-up display device 10 mounted in a vehicle and displaying a virtual image using light source light so that the image is visible to a passenger, a projection member 40 onto which the image is projected includes a first translucent plate 40 including a first surface 42a on a front side in the direction of the passenger and maintaining a polarized state; a second translucent plate 44 including a second surface 44a on a rear side opposite to the front side and maintaining a polarized state; and a phase difference plate 46 held between the first translucent plate 42 and the second translucent plate 44 and including a phase advance axis and a phase delay axis delaying a phase with respect to the phase advance axis. The light source light is obliquely incident on the first surface 42a along an incident cross-section and contains both an s polarized component and a p polarized component, and the phase delay axis of the phase difference plate 46 is inclined with respect to the incidence cross-section.
【課題】虚像の視認性を高める投影部材を提供する。【解決手段】車両に搭載され、光源光を利用して画像を乗員により視認可能に虚像表示するヘッドアップディスプレイ装置10において、画像が投影される投影部材40は、乗員を向く表側において第1面42aを有し、偏光状態を維持する第1透光板42と、表側に対して反対の裏側において第2面44aを有し、偏光状態を維持する第2透光板44と、第1透光板42と第2透光板44との間に挟まれ、進相軸及び進相軸に対して位相を遅らせる遅相軸を有する位相差板46とを備える。光源光は、入射断面に沿って第1面42aに斜めに入射し、かつ、s偏光成分及びp偏光成分の両方を含み、位相差板46の遅相軸は、入射断面に対して傾いている。【選択図】図4
PROJECTION MEMBER, HEAD-UP DISPLAY DEVICE, AND POLARIZED SUNGLASS
投影部材、ヘッドアップディスプレイ装置、及び偏光サングラス
2015-12-14
Patent
Electronic Resource
Japanese
NTRS | 1984