Head-up display
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTsutomu Iwashita, Tomoaki Miyamoto
Life of this patent
Estimating the term…
Abstract
Head-up display includes: display element for displaying an image, and a projection optical system for projecting the image, which is displayed on display element, onto viewing region of viewer. The projection optical system includes combiner that is disposed at a position in an optical path from display element to viewing region of viewer. Combiner has a surface at which light incident from display element enters; the surface has a curved surface shape. Combiner has an effective region corresponding to viewing region of viewer. In the effective region, combiner has a horizontal cross-sectional shape that changes in thickness along from the center toward an end.
Claims9
A head-up display, comprising:
- a display element for displaying an image;
- and
- a projection optical system for projecting, onto a viewing region of a viewer, the image displayed on the display element, the projection optical system including
- a combiner disposed at a position in an optical path from the display element to the viewing region of the viewer,
- wherein the combiner includes a front surface at which light incident from the display element enters, the front surface having a curved surface shape, the combiner having a center, an upper end, a lower end, a right end, a left end and an effective region corresponding to the viewing region of the viewer;
- the effective region of the combiner is configured to have a longitudinal cross-sectional shape in which a thickness of the combiner gradually decreases from the upper end to the lower end or gradually decreases from the lower end to the upper end,
- the effective region of the combiner is configured to have a transverse cross-sectional shape in which the thickness of the combiner gradually increases from the center to the left end when viewed from the viewer, and
- the effective region of the combiner is configured to have a transverse cross-sectional shape in which the thickness of the combiner gradually increases from the center to the right end when viewed from the viewer.
A head-up display, comprising:
- a display element for displaying an image;
- and
- a projection optical system for projecting, onto a viewing region of a driver of a vehicle, the image displayed on the display element, the projection optical system including
- a windshield disposed at a position in an optical path from the display element to the viewing region of the driver,
- wherein the windshield includes a front surface at which light incident from the display element enters, the front surface having a curved surface shape, the windshield having a center, an upper end, a lower end, a right end, a left end and an effective region corresponding to the viewing region of the driver;
- if the viewer looks up the windshield, the effective region of the windshield is configured to have a longitudinal cross sectional shape in which the thickness of the windshield gradually decreases from the lower end to the upper end,
- the effective region of the windshield is configured to have, for a left hand steering wheel vehicle, a transverse cross-sectional shape in which the thickness of the windshield gradually increases from the center to the left end when viewed from the driver, and
- the effective region of the windshield is configured to have, for a right hand steering wheel vehicle, a transverse cross-sectional shape in which the thickness of the windshield gradually increases from the center to the right end when viewed from the driver.
Dependencies are inferred from the claim text.