Electronic devices with flexible displays and hinges
An electronic device may have a flexible display that overlaps an axis. The display may be supported by a housing. The housing may have first and second portions that rotate relative to each other about the axis. The housing may be placed in an unfolded configuration to support the display in a planar state. The housing may also be placed in a folded configuration by rotating the first and second portions relative to each other. A hinge mechanism may be used to ensure adequate separation between the first and second portions when the housing is bent. Movable flaps may be retracted when the housing is bent to create room for a bent portion of the display.
1 . An electronic device operable in folded and unfolded configurations, comprising:
first and second housing portions that fold about a fold axis;
a hinge coupled between the first and second housing portions;
a flexible display overlapping the fold axis and having a first display portion overlapping the first housing portion and a second display portion overlapping the second housing portion; and
a metal backplate having a first metal portion attached to a rear side of the first display portion, a second metal portion attached to a rear side of the second display portion, and a third metal portion between the first and second metal portions, wherein the third metal portion has slots overlapping the fold axis and is more flexible than the first and second metal portions and wherein the slots extend only partway through the third metal portion.
2 . The electronic device defined in claim 1 wherein the slots extend parallel to the fold axis.
3 . The electronic device defined in claim 1 further comprising a glass cover layer overlapping the flexible display.
4 . The electronic device defined in claim 3 wherein the glass cover layer comprises a flexible center region aligned with the fold axis.
5 . The electronic device defined in claim 1 further comprising a hinge cover that covers the hinge.
6 . The electronic device defined in claim 5 wherein the hinge comprises flaps that move within the hinge cover as the first and second housing portions are folded and unfolded.
7 . The electronic device defined in claim 1 wherein the hinge comprises a first gear that rotates the first housing portion about the fold axis, a second gear that rotates the second housing portion about the fold axis, and a third gear coupled between the first and second gears, wherein the third gear rotates about an axis that is perpendicular to the fold axis.
8 . The electronic device defined in claim 7 wherein the first gear is coupled to a first pin that slides within a first slot in the first housing portion during folding and unfolding and the second gear is coupled to a second pin that slides within a second slot in the second housing portion during folding and unfolding.
9 . The electronic device defined in claim 8 wherein the third gear comprises a helical gear.
10 . The electronic device defined in claim 1 further comprising biasing structures that bias opposing edges of the flexible display outwardly from the hinge to hold the flexible display flat in the unfolded configuration.
11 . An electronic device operable in folded and unfolded configurations, comprising:
first and second housing portions that fold about a fold axis;
a hinge coupled between the first and second housing portions;
a hinge cover that overlaps the hinge, wherein the hinge comprises flaps that move within the hinge cover when the first and second housing portions are folded and unfolded, wherein the hinge cover has an inner surface that is parallel to the first and second housing portions when the first and second housing portions are unfolded, and wherein the flaps contact the inner surface of the hinge cover as the electronic device moves from the unfolded configuration to the folded configuration; and
a flexible display overlapping the fold axis.
12 . The electronic device defined in claim 11 wherein the hinge cover has a first side coupled to the first housing portion and a second side coupled to the second housing portion.
13 . The electronic device defined in claim 11 further comprising a glass cover layer overlapping the flexible display, wherein the glass cover layer comprises a flexible center region aligned with the fold axis.
14 . The electronic device defined in claim 11 wherein the first housing portion has a first slot, the second housing portion has a second slot, and the hinge has first and second pins that slide respectively within the first and second slots during folding and unfolding.
15 . An electronic device operable in folded and unfolded configurations, comprising:
first and second housing portions that fold about a fold axis;
a hinge coupled between the first and second housing portions, wherein the hinge is hidden from view by a hinge cover;
a flexible display overlapping the fold axis;
a glass display cover layer overlapping the flexible display and having first and second rigid portions and a flexible center portion aligned with the fold axis and interposed between the first and second rigid portions; and
biasing springs that bias opposing edges of the flexible display outwardly from the hinge to hold the flexible display flat in the unfolded configuration.
16 . The electronic device defined in claim 15 wherein the hinge cover is coupled between the first and second housing portions.
17 . The electronic device defined in claim 16 wherein the hinge comprises flaps that move within the hinge cover during folding and unfolding.
18 . The electronic device defined in claim 15 further comprising a metal backplate with slots overlapping the fold axis.