Headup display apparatus

• US 20070229394A1
• Filed: 01/18/2007
• Published: 10/04/2007
• Est. Priority Date: 03/31/2006
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Fujikawa, Takayuki, Andoh, Hiroshi, Ishikawa, Toshiki
• Application Number:
  US11/654,517
• Publication Number:
  US 20070229394A1
• Time in Patent Office: Days
• US Class Current: 345/7
• CPC Class Codes: G02B 2027/011 comprising device for correcting geometrical aberrations, distortion
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 3/08 with discontinuous faces, e.g. Fresnel lens diffractive Fresnel lenses G02B5/1876

Abstract

A display apparatus for use in a vehicle includes an irradiation source for irradiating a light of an image, a redirection component for redirecting the light of the image, an optical component for magnifying the image that enters therein, and a reflection component for reflecting the light of the image for an occupant of the vehicle. The redirection component is disposed at an angle to a light axis of the light of the image irradiated by the irradiation source in a light path between the irradiation source and the optical component, and the redirection component corrects a distortion of the virtual image being perceptible for the occupant of the vehicle by at least one of the optical component and the reflection component.

Claims

1. A display apparatus for use in a vehicle comprising:

an irradiation source for irradiating a light of an image;

a redirection component for redirecting the light of the image;

an optical component for permeably magnifying the image in a course of permeation therethrough when the light of the image redirected by the redirection component enters therein; and

a reflection component for permeably reflecting the light of the image for visual perception of the light of the image as a virtual image by an occupant of the vehicle when the light of the image magnified by the optical component enters therein,

wherein the redirection component is disposed at an angle to a light axis of the light of the image irradiated by the irradiation source in a light path between the irradiation source and the optical component, and

the redirection component corrects a distortion of the virtual image in the visual perception by the occupant of the vehicle by at least one of the optical component and the reflection component.

2. The display apparatus as in claim 1,

wherein the redirection component lacks an axis of rotational symmetry at a point where the light axis of the light of the image irradiated by the irradiation source crosses the redirection component.

3. The display apparatus as in claim 1,

wherein the redirection component corrects the distortion of the image caused by the optical component in the course of the permeation therethrough when the image redirected by the redirection component enters the optical component.

4. The display apparatus as in claim 1,

wherein the redirection component corrects the distortion of the image caused by the reflection component in a course of at least one of permeation therethrough and reflection thereby when the image is redirected by the redirection component after magnification by the optical component.

5. The display apparatus as in claim 1,

wherein an incident side surface of the optical component is disposed perpendicularly to the light axis of the image redirected by the redirection component.

6. The display apparatus as in claim 1,

wherein an incident side surface of the optical component is disposed at a predetermined angle to the light axis of the image redirected by the optical component, and

the predetermined angle is defined as an angle that allows a redirection of an ambient light toward an outside of a view of the occupant of the vehicle when the ambient light is reflected by the incident side surface after entering from an output side surface on an opposite side relative to the incident side surface in the optical component.

7. The display apparatus as in claim 1,

wherein an output side surface of the optical component is disposed perpendicularly to the light axis of the image redirected by the optical component.

8. The display apparatus as in claim 5,

wherein an output side surface of the optical component is disposed perpendicularly to the light axis of the image redirected by the optical component.

9. The display apparatus as in claim 6,

wherein an output side surface of the optical component is disposed perpendicularly to the light axis of the image redirected by the optical component.

10. The display apparatus as in claim 1,

wherein an output side surface of the optical component is disposed at a predetermined angle to the light axis of the image redirected by the optical component, and

the predetermined angle is defined as an angle that allows a redirection of an ambient light toward an outside of a view of the occupant of the vehicle when the ambient light is reflected by the output side surface after entering from the output side surface on an opposite side relative to the incident side surface in the optical component.

11. The display apparatus as in claim 5,

wherein an output side surface of the optical component is disposed at a predetermined angle to the light axis of the image redirected by the optical component, and

the predetermined angle is defined as an angle that allows a redirection of an ambient light toward an outside of a view of the occupant of the vehicle when the ambient light is reflected by the output side surface after entering from the output side surface on an opposite side relative to the incident side surface in the optical component.

12. The display apparatus as in claim 6,

wherein an output side surface of the optical component is disposed at a predetermined angle to the light axis of the image redirected by the optical component, and

the predetermined angle is defined as an angle that allows a redirection of an ambient light toward an outside of a view of the occupant of the vehicle when the ambient light is reflected by the output side surface after entering from the output side surface on an opposite side relative to the incident side surface in the optical component.

13. The display apparatus as in claim 1,

wherein the image irradiated by the irradiation source is magnified by the optical component and the redirection component, and

a magnification rate of the image by the optical component is greater than the magnification rate of the image by the redirection component.

14. The display apparatus as in claim 1,

wherein the optical component is Fresnel lens.

15. The display apparatus as in claim 1,

wherein the Fresnel lens has an axis of rotation symmetry.

16. The display apparatus as in claim 1,

wherein the Fresnel lens is a cylindrical Fresnel lens,

the cylindrical Fresnel lens has a magnification rate in a first direction that is defined by a curvature of the reflection component in a second direction, and

the magnification rate of the Fresnel lens in a third direction that is perpendicular to the first direction is defined by the curvature of the reflection component in a fourth direction that is perpendicular to the second direction.

17. The display apparatus as in claim 14,

wherein the Fresnel lens is formed on a transparent plane board.

18. The display apparatus as in claim 14,

wherein the Fresnel lens has at least one of an incident side surface and an output side surface formed on a transparent curved board.

19. The display apparatus as in claim 1,

wherein an incident side surface of the optical component that receives an incident light of the image reflected by the redirection component and an output side surface of the optical component that outputs the light of the image that is redirected by the redirection component are disposed in a twisted position relative to each other.

20. The display apparatus as in claim 1,

wherein the light of the image irradiated by the irradiation source is redirected by at least one reflector including the redirection component beside being magnified by the optical component.

21. The display apparatus as in claim 1,

wherein a plurality of light axes of the light of the image irradiated by the irradiation source exist on a same plane in a light path between irradiation by the irradiation source and entrance to the optical component.

22. The display apparatus as in claim 20,

wherein a plurality of light axes of the light of the image irradiated by the irradiation source exist on a same plane in a light path between irradiation by the irradiation source and entrance to the optical component.

23. The display apparatus as in claim 1,

wherein the optical component is made of plural materials with respectively different refractive indexes.

24. The display apparatus as in claim 1,

wherein the redirection component is selectively replaceable according to a reflection characteristic of the reflection component.

25. The display apparatus as in claim 1,

wherein the virtual image has a relationship of similarity with the image irradiated by the irradiation source.