公开(公告)号：US11513433B2

公开(公告)日：2022-11-29

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 ,  G02B5/04

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：US10416446B2

公开(公告)日：2019-09-17

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

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.

公开(公告)号：US10031368B2

公开(公告)日：2018-07-24

申请号：US15614539

申请日：2017-06-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Sosuke Otani ,  Yoshimasa Fushimi

IPC: H04N1/04 ,  G02F1/1335 ,  G02B27/01 ,  G02B5/30 ,  F21V8/00 ,  F21V5/00

Abstract: A head-up display includes an image light output device for outputting image light, a first optical element, a second optical element, and a third optical element. The first optical element is provided to be inclined with respect to the output surface of the image light output device. The first optical element reflects the image light having a first polarization direction and allowing the image light having second polarization direction to pass through. The second optical element reflects the image light from the first optical element to the first optical element. The third optical element is disposed between the first and the second optical element, and converts the image light having the first polarization direction to the image light having the second polarization direction by allowing the image light to pass through back and forth. The image light passing through the first optical element is projected on a combiner.