Windshield for head-up display system

• US 7,060,343 B2
• Filed: 03/09/2005
• Issued: 06/13/2006
• Est. Priority Date: 09/28/1989
• Status: Expired due to Fees

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Freeman, Glenn E.
• Primary Examiner(s): Loney, Donald J.
• Application Number:
  US11/075,455
• Publication Number:
  US 20050158520A1
• Time in Patent Office: 461 Days
• Field of Search: 428/172, 428/212, 359/630, 359/631, 296/84.1, 296/96.12, 296/96.19
• US Class Current: 428/172
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10165 Functional features of the laminated safety glass or glazing
• CPC Class Codes: B32B 17/10568 varying in thickness
• CPC Class Codes: B32B 17/1066 imparting a tint in certain regions only, i.e. shade band
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10981 Pre-treatment of the layers
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 3/02 characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 2027/0121 Parasitic image effect attenuation by suitable positioning of the parasitic images
• CPC Class Codes: G02B 27/0018 with means for preventing ghost images anti-reflection coatings G02B1/11
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: Y10T 428/187 Continuous sectional layer
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 428/24479 including variation in thickness
• CPC Class Codes: Y10T 428/24504 Component comprises a polymer [e.g., rubber, etc.]
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/26 : Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/3163 : Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]

Abstract

A heads-up display system includes a laminate and an image projecting source for directing an image onto a first portion of the laminate. The outer major surfaces of the laminate are angularly offset within a first portion is such that an image from the image projector source projected onto a first major surface of the laminate within the first portion is reflected in a manner that reduces double imaging of the reflected image.

Claims

1. A heads-up display system comprising:

a laminate having a first major surface and an opposing second major surface, comprising;

a first rigid transparent ply;

a second rigid transparent ply; and

an interlayer material securing the first rigid transparent ply to the second rigid transparent ply, wherein the first and second major surfaces of the laminate within a first portion of the laminate are angularly offset from each other a first amount, and the first and second major surfaces of the laminate within a second portion of the laminate are either angularly offset from each other a second amount different from the first amount or are substantially parallel to each other; and

an image projecting source for directing an image onto the first portion of the laminate, wherein the laminate and image projecting source are oriented relative to each other such that an image from the image projector source projected onto the first major surface of the laminate within the first portion is reflected in a manner that reduces double imaging of the reflected image.

2. The display system of claim 1, wherein at least one of the first and second transparent plies has a wedged shaped thickness to angularly offset the first and second major surfaces within the first portion of the laminate.

3. The display system of claim 1, wherein at least a portion of the interlayer material has a wedged shaped thickness to angularly offset the first and second major surfaces within the first portion of the laminate.

4. The display system of claim 1, wherein the first and second major surfaces of portions of the laminate within the second portion are substantially parallel to each other.

5. The display system of claim 1, wherein the first and second major surfaces of portions of the laminate within the second portion are angularly offset an amount less than the angular offset amount of the first and second major surfaces within the first portion.

6. The display system of claim 1, wherein the first and second transparent plies are glass.

7. The display system of claim 1, wherein the laminate is a vehicle windshield.

8. The display system of claim 1, wherein the laminate is an automotive windshield.

9. The display system of claim 1, wherein the interlayer comprises polyvinylbutyral.

10. The display system of claim 1, wherein the first and second major surfaces are angularly offset from each other within the selected portion of the laminate by at least 0.0115°

.

12. The display system of claim 1, wherein at least one of the first and second transparent plies has a wedged shaped thickness to angularly offset the first and second major surfaces within the first portion of the laminate.

13. The display system of claim 1, wherein at least a portion of the interlayer material has a wedged shaped thickness to angularly offset the first and second major surfaces within the first portion of the laminate.

14. The display system of claim 1, wherein the first and second major surfaces of portions of the laminate within the second portion are substantially parallel to each other.

15. The display system of claim 1, wherein the first and second major surfaces of portions of the laminate within the second portion are angularly offset an amount less than the angular offset amount of the first and second major surfaces within the first portion.

16. The display system of claim 1, wherein the first and second transparent plies are glass.

17. The display system of claim 1, wherein the laminate is a vehicle windshield.

18. The display system of claim 1, wherein the laminate is an automotive windshield.

19. The display system of claim 1, wherein the interlayer comprises polyvinylbutyral.

20. The display system of claim 1, wherein the first and second major surfaces are angularly offset from each other within the selected portion of the laminate by at least 0.0115°

.

11. A heads-up display system comprising:

a laminate having a first major surface and an opposing second major surface, comprising;

a first rigid transparent ply;

a second rigid transparent ply; and

an interlayer material securing the first rigid transparent ply to the second rigid transparent ply, wherein the first and second major surfaces of the laminate within a first portion of the laminate are angularly offset from each other a first amount, and the first and second major surfaces of the laminate within a second portion of the laminate are either angularly offset from each other a second amount different from the first amount or are substantially parallel to each other; and

an image projecting source for directing an image onto the first portion of the laminate, wherein the angular offset of the first and second major surfaces of the laminate within the first portion is such that an image from the image projector source projected onto the first major surface of the laminate within the first portion is reflected in a manner that reduces double imaging of the reflected image.