Reflective cluster display

• US 5,198,936 A
• Filed: 01/03/1992
• Issued: 03/30/1993
• Est. Priority Date: 01/03/1992
• Status: Expired due to Term

• Current Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Stringfellow, Steven A.
• Primary Examiner(s): Henry, Jon W.
• Application Number:
  US07/816,919
• Time in Patent Office: 452 Days
• Field of Search: 359/631, 359/633, 359/839, 359/838, 359/863, 359/859, 359/858, 359/884, 340/705, 340/980
• US Class Current: 359/831
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 35/60 Instruments characterised by their location or relative disposition in or on vehicles arrangements of lighting devices on dashboards B60Q3/10
• CPC Class Codes: G02B 5/10 with curved faces

Abstract

A display apparatus includes an image source displaying information and a magnifying mirror element reflecting the displayed information and projecting one or more images thereof viewable by the operator in one or more focal planes, the mirror element being partially light transmissive. A display data source is also provided so that, in a first mode, the display data is not visible and in a second mode the display data is visible to the operator through the mirror.

Claims

1. A vehicle display device comprising:

an image source displaying information;

a spherical concave mirror, mounted near the image source, reflecting the displayed information to project a virtual image thereof viewable by an operator, the spherical concave mirror comprising (i) a partially transparent mirror with a first surface facing the display source and a second surface opposite the display source and (ii) a mask layer on the second surface of the partially transparent mirror defining display data normally not visible to the operator; and

means, positioned proximate to the partially transparent mirror opposite the image source, for sourcing light onto the defined display data, so that when the defined display data receives the light, the display data becomes visible to the operator.

2. The apparatus set forth in claim 1, wherein the partially transparent mirror comprises:

a primarily transparent optical element with two surfaces, one facing the image source and the other opposite the image source; and

a partially transparent reflective coating on at least one of the two surfaces of the optical element.

3. The apparatus set forth in claim 1, wherein the image source comprises a primary source mounted in a first source plane and a secondary source mounted in a second source plane, whereby the virtual image comprises a primary virtual image in a first image plane and a secondary virtual image in a second image plane.

4. The apparatus set forth in claim 2, wherein the partially transparent reflective coating is a metallic coating.

5. The apparatus set forth in claim 2 wherein the partially transparent reflective coating is a dark color coating.

6. The apparatus set forth in claim 2 wherein the partially transparent reflective coating is a black coating.

7. The apparatus set forth in claim 4 wherein the metallic coating comprises at least one element of a set including aluminum and stainless steel.