Head-up viewing display

• US 4,181,405 A
• Filed: 08/07/1978
• Issued: 01/01/1980
• Est. Priority Date: 08/07/1978
• Status: Expired due to Term

• Current Assignee: Hughes Aircraft Company (Rtx Corporation)
• Original Assignee: Singer PLC (Hayleys Plc)
• Inventors: Cohen, Edwin
• Primary Examiner(s): Bauer, Edward S.
• Application Number:
  US05/931,299
• Time in Patent Office: 512 Days
• Field of Search: 350/331, 350/174, 350/239, 2/6, 35/12 N
• US Class Current: 349/11
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: Y10S 359/90 Methods

Abstract

A field of view display for presenting data in focus on a subject'"'"'s far field of view is disclosed. The display comprises an optically transparent viewing medium interposed between a subject and the subject'"'"'s far field of view. Display units are attached to or embedded in the medium for producing a visual signal to the subject which is small enough to allow substantially unobstructed viewing of the far field view. Focusing material connected to or comprising part of the medium between the subject and the display units brings the display units into focus on the subject'"'"'s field of view.

Claims

1. A field of view display by which a subject can view display data which is in focus on a far field of view comprising:

(a) an optically transparent viewing medium interposed between a subject and the subject'"'"'s far field of view, said medium mechanically coupled to the subject'"'"'s head in order that movement of the head produces corresponding movement of said medium;

(b) electrically controllable display means attached to said medium in the field view of said subject for transmitting information to the subject, said display means occupying a relatively small angular area of said medium for permitting substantially unobstructed viewing of the far field of view; and

(c) focusing means connected to the medium between the subject and said display means, said focusing means operative to bring the display means into focus to the subject so that information transmitted by the display means is superimposed in focus on the subject'"'"'s field of view.

2. The display of claim 1 which further comprises a helmet worn by the subject and in which the transparent viewing medium is attached to said helmet to coordinate head movement with medium movement.

3. The display of claim 1 wherein the attached display means are located sufficiently near the subject'"'"'s eyes to insure they would remain out of focus but for the presence of the focusing means.

4. The display claimed in claim 3 wherein said focusing means is optically transparent and itself remains out of focus to the subject.

5. The display claimed in claim 1 wherein said display means comprises a plurality of electrically actuated alphanumeric display elements, said focusing means comprising a plurality of lenses each associated with a respective display element.

6. The display claimed in claim 5 wherein each display element is positioned at or near the focal point of its respective lens.

7. A field of view display for displaying data in focus on a subject'"'"'s distant field of view comprising:

(a) an optically transparent medium mechanically coupled to the subject'"'"'s head and interposed between the subject and the subject'"'"'s distant field of view;

(b) electrically controllable display means attached to said medium in the field of view of the subject for producing a visual signal to the subject, said display means being small enough to allow substantially unobstructed viewing of the far field of view; and

(c) focusing means optically coupled to the medium and positioned between the subject and the display means, said transmission means being operative to bring the display means into focus at a more distant plane than the physical plane of the display means.

8. The visual display of claim 7 wherein the display means comprise an externally controlled visual unit with an on state in which information is being conveyed and an off state in which information is not being conveyed.

9. The visual display of claim 8 wherein the externally controlled visual unit comprises one or more light emitting diodes.

10. The visual display of claim 7 wherein the externally controlled visual unit comprises one or more liquid crystal devices.

11. The visual display of claim 8 wherein the transmission means comprises one or more convex lenses forming part of the medium and disposed away from the subject.

12. The visual display of claim 11 wherein the display means are disposed away from convex lens a distance approximately equal to the focal length of said lens.

13. A method for supplying information to a subject'"'"'s field of view comprising the steps of:

(a) interposing a transparent medium between the subject and the field of view and mechanically coupling the medium to the subject'"'"'s head;

(b) optically coupling one or more convex lenses to the transparent medium, the solid viewing angle subtended by said lenses being small enough to insubstantially interfere with the subject'"'"'s viewing; and

(c) causing the light rays from an electrically controllable information conveying means located in the field of view of the subject and attached to said medium to pass through said convex lenses in such a way that the information conveying means appears in focus at a more distant plane than the actual physical plane of the information conveying means.

14. The method of claim 13 wherein the convex lenses are arranged in a matrix of lenses;

the matrix comprising a number of abutting lenses.

15. The method of claim 13 wherein the convex lenses are arranged in a matrix of lenses;

the matrix comprising spaced lenses.