Head-up display device

Patent metadata

Field	Value
Publication number	US-2017045740-A1
Application number	US-201415307121-A
Country	US
Kind code	A1
Filing date	May 9, 2014
Priority date	May 9, 2014
Publication date	Feb 16, 2017
Grant date	—

Abstract

A head-up display device that displays information including a video in a part of a field of view of an operator ( 407 ) includes a video display device ( 420 ) that is arranged at a position deviated from the field of view of the operator and generates and projects video light for projecting the information and a transparent screen ( 410 ) that is arranged in a part of the field of view of the operator, and transmit light from the field of view and reflects projection light from the video display device in a direction of the operator. A solid-state light source device ( 421 ) that reflects and mixes light emitted from a plurality of light-emitting cells ( 40 ) and emits the light obtained by the mixing in a predetermined direction is used as a light source constituting the video display device.

First claim

1 . A head-up display device that displays information including a video in a part of a field of view of an operator, comprising:
a video display device that is arranged at a position deviated from the field of view of the operator and generates and projects video light for projecting the information; and a transparent screen that is arranged in a part of the field of view of the operator, and transmit light from the field of view and reflects projection light from the video display device in a direction of the operator, wherein a solid-state light source device that reflects and mixes light emitted from a plurality of light-emitting cells and emits the light obtained by the mixing in a predetermined direction is used as a light source constituting the video display device.

2 . The head-up display device according to claim 1 ,
wherein the solid-state light source device of the video display device emits the white light, and the video display device includes an optical modulation unit that splits the white light emitted from the solid-state light source device into an R light, a G light, and a B light and generates the video light, a projection optical system that magnifies and projects the video light output from the optical modulation unit, and an optical direction converting unit that receives the video light from the optical modulation unit through the projection optical system and projects the video light toward the transparent screen.

3 . The head-up display device according to claim 1 ,
wherein the solid-state light source device includes light-emitting cells that emits R light, G light, and B light, and emits the R light, the G light, and the B light sequentially and selectively, the video display device further includes an optical modulation unit that generates R light video light, G light video light, and B light video light by sequentially modulating the R light, the G light, and the B light sequentially emitted from the solid-state light source device in a cycling manner, a projection optical system that magnifies and projects the R light video light, the G light video light, and the B light video light output from the optical modulation unit, and an optical direction converting unit that receives the R light video light, the G light video light, and the B light video light from the optical modulation unit through the projection optical system, and projects the R light video light, the G light video light, and the B light video light toward the transparent screen.

4 . The head-up display device according to claim 3 ,
wherein the emitting of the R light, the G light, and the B light from the solid-state light source device is performed with a cycle of 120 Hz to 480 Hz.

5 . The head-up display device according to claim 1 ,
wherein the transparent screen includes an anti-reflection film formed on a surface.

6 . The head-up display device according to claim 1 ,
wherein the transparent screen includes a plurality of fine protrusions having a triangular cross section and a rectangular overall shape formed on a surface.

7 . The head-up display device according to claim 1 ,
wherein the solid-state light source device includes an outer circumference surface covered with a reflection film, a leading end portion on which a paraboloidal surface is formed, and a light guiding member of substantially a rectangular external shape, and a plurality of light source cells are arranged on the outer circumference surface.

8 . The head-up display device according to claim 2 ,
wherein the video display device further includes a second optical modulation unit in a part of the projection optical system or the optical direction converting unit.

9 . The head-up display device according to claim 8 ,
wherein the optical modulation unit of the video display device displays a video of information to be displayed in a three dimensional (3D) manner together with the second optical modulation unit.

10 . The head-up display device according to claim 1 ,
wherein the transparent screen includes a plurality of fine protrusions having a triangular cross section, and the plurality of fine protrusions are formed on a surface in which the projection light from the video display device is received.

Assignees

• Hitachi Maxell

Inventors

• Hirata Koji
• Yatsu Masahiko
• Misawa Akio

Classifications

• B60K35/28

  characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver · CPC title

• B60K35/231

  characterised by their arrangement or structure for integration into vehicles · CPC title

• B60K37/20

  Dashboard panels · CPC title

• B60K35/425

  Anti-reflection arrangements · CPC title

• B60K35/211

  producing three-dimensional [3D] effects, e.g. stereoscopic images · CPC title