Flexible information handling system display external hinge structure

1. An information handling system comprising:

first and second housing portions, at least one of the housing portions containing processing components that cooperate to process information;

a hinge rotationally coupling the first and second housing portions, the hinge having plural link elements rotationally coupled together, each link element having a face that defines an arc with a first center of rotation, an interior having a cavity that defines the arc to accept a face of another link element that rotates within the cavity, and a coupling element that extends out of the cavity to define a center of rotation of the link element behind the center of the arc, each coupling element fixed at one end to a first of the plural link elements and at an opposing end to a second of the plural link elements, each coupling element rotating at one rotational break between the opposing ends; and

a flexible display disposed over the first and second housing portions, the flexible display bending as the housing portions rotate between the planar and the closed configurations;

wherein the plural link elements rotate about the coupling element center of rotation and maintain the link element faces within adjacent link element cavities so that gaps do not present between the link elements.

2. The information handling system of claim 1 wherein each link element further comprises:

a first portion having the face and cavity defined for a length substantially the same as a length of the housing portions, the length having one or more openings through the face and cavity; and

a second portion disposed in the first portion cavity proximate the one or more openings, the second portion extending out of the cavity to define the center of rotation of the link element.

3. The information handling system of claim 2 wherein each link element further comprises:

a first mounting face disposed within the cavity and configured to couple to the coupling element; and

a second mounting face disposed on the second portion and aligned to fit through an adjacent link element opening to couple with an adjacent link element coupling element.

4. The information handling system of claim 3 wherein the plural link elements have the openings disposed in a zig zag pattern across adjacent link elements.

5. The information handling system of claim 3 wherein the flexible display comprises an OLED display film.

6. The information handling system of claim 3 wherein the hinge element coupling element comprises a friction device to generate torque against rotation of the hinge.

7. The information handling system of claim 3 further comprising a cable guide formed in each link element first portion and aligned to provide a path for one or more cables between the housing portions.

8. The information handling system of claim 3 further comprising a shape memory alloy support disposed between the flexible display and hinge.

9. The system of claim 1 wherein the hinge rotates the housing portions between a closed configuration and a planar configuration.

10. A method for rotationally coupling information handling system housing portions having a flexible display, the method comprising:

inserting a first hinge element face into a second hinge element cavity, the face and cavity having an arc with a center of rotation at the first hinge element;

inserting a hinge coupling element into a cavity of the first hinge element;

fixing a first end of the hinge coupling element directly to the first hinge element;

fixing a second end of the hinge coupling element directly to the second hinge element, the first end opposite the second end, the coupling element rotating at one rotational break between the first and second ends; and

defining with the hinge coupling element a center of rotation for the first hinge element that is outside of the arc center of rotation for the face and cavity.

11. The method of claim 10 wherein the center of rotation for the first hinge coupling element is located sufficiently distal the arc center of rotation so that a gap does not form between the face and cavity during rotation of the first hinge element relative to the second hinge element.

12. The method of claim 11 further comprising:

integrating friction plates in the hinge coupling element that engage normal the rotation of the hinge coupling element; and

translating rotational motion about the hinge coupling element through the friction plates into torque that manages motion of the housing portions.

13. The method of claim 12 further comprising changing the friction of the friction plates based upon angle of rotation of the hinge coupling element.

14. The method of claim 10 wherein coupling the hinge coupling element directly to the second hinge element further comprises:

extending a mounting block from the second hinge element through an opening of the first hinge element to align with a mounting block disposed at the cavity of the first hinge element; and

coupling the hinge coupling element to the aligned mounting blocks.

15. The method of claim 10 further comprising coupling at least three hinge elements together, with at least three hinge coupling elements disposed in a zig zag pattern.

16. A hinge comprising:

plural hinge elements, each hinge element having an arc face and an arc cavity interior, the hinge elements arranged to have the hinge element arc faces inserted into the adjacent hinge element arc cavity interiors, the arc faces rotating within the arc cavity interiors; and

plural hinge coupling elements, each hinge coupling element fixed at a first end to a first mounting face and fixed at a second end to a second mounting face, the first mounting face extending directly from an arc cavity interior, the second mounting face extending from an adjacent arc cavity interior through an opening of the arc face and into the arc cavity interior, each hinge coupling element rotating about one rotational break between the first and second ends;

wherein hinge coupling elements rotate about an axis located distal the arc cavity center of rotation.

17. The hinge of claim 16 further comprising first and second housing mounts disposed at opposing ends of the plural hinge elements and operable to couple to an information handling system housing.

18. The hinge of claim 17 wherein the plural hinge coupling elements are disposed in a zig zag pattern between the hinge elements.

19. The hinge of claim 17 wherein each hinge element has a center point defined by the arc radius, the hinge element mounts disposing the hinge coupling elements center of rotation outside of a diameter of the arc relative to the front face.

20. The hinge of claim 17 further comprising friction plates integrated in each hinge coupling element disposed perpendicular to the axis of rotation, the friction elements generating torque in response to rotation of hinge elements relative to each other.