An HUD (42) is provided with: an image generation unit (424) that emits light for generating a predetermined image; a light guide (426) that totally reflects and propagates the light emitted from the image generation unit (424); an incidence HOE (425) that changes the direction of the light such that the light emitted from the image generation unit (424) is totally reflected within the light guide body (426); an emission HOE (427) that changes the direction of the light such that the light, which is totally reflected and propagated in the light guide body (426), is emitted from the light guide body (426); and a microlens array (428) that refracts incident light in a predetermined direction and emits the light. The microlens array (428) is provided behind the emission HOE (427) in the optical path of the light.
HUD(42)具备:图像生成部(424),其射出用于生成预定的图像的光;导光体(426),其使从图像生成部(424)射出的光全反射并传播;入射用HOE(425),其变更光的方向,以使从图像生成部(424)射出的光在导光体426内全反射;射出用HOE(427),其变更光的方向,以使在导光体(426)内全反射并传播的光从导光体(426)射出;微透镜阵列(428),其使入射的光在规定的方向上折射并射出。微透镜阵列(428)设置在光的光路中的射出用HOE(427)之后。
HEAD-UP DISPLAY
平视显示器
2021-07-23
Patent
Elektronische Ressource
Chinesisch
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