公开(公告)号：US20210124250A1

公开(公告)日：2021-04-29

申请号：US17078512

申请日：2020-10-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Manabu OKUNO ,  Yoshimasa FUSHIMI

IPC: G03B21/20 ,  G03B21/00

Abstract: A lighting device of the present disclosure includes a light source device and a reflective component. The reflective component reflects an illumination light incident from the light source device off the reflecting surface of the reflective component at incident angle α, and emits the illumination light reflected toward a display element at exit angle β. The reflecting surface of the reflective component is rotated with respect to two axes orthogonal to each other. 20 degrees≤|α−β|≤60 degrees is satisfied. Where, each of the incident angle α and the exit angle β is angle of the illumination light to a horizontal direction of the display element when the illumination light is incident on a front surface of the display element.

公开(公告)号：US20180003970A1

公开(公告)日：2018-01-04

申请号：US15630218

申请日：2017-06-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Sosuke OTANI ,  Yoshimasa FUSHIMI

IPC: G02B27/01

CPC classification number: G02B27/0101 ,  G02B27/0149 ,  G02B2027/011 ,  G02B2027/0145 ,  G02B2027/015

Abstract: A head-up display causes light modulated by an optical modulation element to form, via a projection lens, an intermediate image on a screen, and then causes the intermediate image to reflect, via a mirror, on a windshield to allow a user to view a virtual image. A normal line of the screen is inclined with respect to an optical axis of the projection lens. An emission surface of the optical modulation element is inclined with respect to the screen and a principal plane of the projection lens so as to satisfy a Scheimpflug condition.