Flexible display with electromagnetic adjustment

Patent metadata

Field	Value
Publication number	US-11449104-B2
Application number	US-201916948053-A
Country	US
Kind code	B2
Filing date	Nov 5, 2019
Priority date	Nov 26, 2018
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

A flexible display that can be adjusted by an electromagnetic mechanism to remove a deformation is disclosed. The flexible display is attached to a body that is configurable in a folded configuration or an unfolded configuration by a hinge mechanism. When unfolded the flexible display includes a deformation (i.e., warp) in an area around the hinge mechanism. Accordingly, an electromagnet is included with the hinge mechanism to remove the deformation by attracting a magnetic element is disposed on a back surface of the flexible display.

First claim

What is claimed is:

1. A mobile computing device comprising:
a body that includes first and second portions connected by a hinge mechanism, the body being configurable into a folded configuration or an unfolded configuration by operation of the hinge mechanism;
a flexible display that is connected to and supported by the first and second portions of the body in the folded configuration and in the unfolded configuration;
a magnetic element disposed on a back surface of the flexible display; and
an electromagnet in the hinge mechanism of the body configured to attract the magnetic element toward the hinge mechanism to maintain the flexible display in a flat configuration when the body is in the unfolded configuration, wherein the electromagnet includes a conductor configured to carry a current in a direction aligned with an axis of rotation of the hinge mechanism.

2. The mobile computing device according to claim 1 , wherein
in the folded configuration, the first and second portions are folded together at the hinge mechanism and the flexible display is wrapped around the first and second portions, and
wherein in the unfolded configuration, the first and second portions are unfolded flat at the hinge mechanism, and the flexible display covers the first and second portions.

3. The mobile computing device according to claim 1 , wherein the electromagnet is configured to, through attraction of the magnetic element toward the hinge mechanism, remove a deformation in the flexible display, wherein the deformation includes a ridge that rises above the first and second portions in the unfolded configuration, the ridge being aligned with the hinge mechanism.

4. The mobile computing device according to claim 3 , wherein the ridge rises above the first and second portions in the unfolded configuration by less than five millimeters.

5. The mobile computing device according to claim 1 , wherein operation of the hinge mechanism produces a rotational motion and a lateral motion between the first and second portions.

6. The mobile computing device according to claim 1 , wherein the conductor is configured as a coil.

7. The mobile computing device according to claim 3 , wherein the magnetic element is disposed on the back surface of the flexible display at a location corresponding to the deformation.

8. The mobile computing device according to claim 7 , wherein the magnetic element includes a ferromagnetic rod.

9. The mobile computing device according to claim 7 , wherein the magnetic element includes a ferromagnetic adhesive.

10. The mobile computing device according to claim 1 , wherein the flexible display includes a flexible organic light emitting diode (OLED) display.

11. The mobile computing device according to claim 1 , wherein the electromagnet is activated when the body is configured in the unfolded configuration and is deactivated when the body is configured in the folded configuration.

12. A method for configuring a mobile computing device, the method comprising:
unfolding, using a hinge mechanism, first and second portions of a body of the mobile computing device so that a flexible display of the mobile computing device covers the first and second portions, the flexible display having a deformation resulting from the unfolding;
activating an electromagnet in the hinge mechanism to produce a magnetic field, wherein the activating includes producing a current in a conductor of the electromagent, the current being in a direction aligned with an axis of rotation of the hinge mechanism; and
attracting, using the magnetic field, a magnetic element disposed on a back surface of the flexible display toward the hinge mechanism to remove the deformation.

13. The method for configuring a mobile computing device according to claim 12 , wherein activating the electromagnet includes:
generating a current in a conductor in the hinge mechanism.

14. The method for configuring a mobile computing device according to claim 12 , wherein the flexible display includes a foldable OLED.

15. The method for configuring a mobile computing device according to claim 12 , wherein the magnetic element includes a ferromagnetic adhesive.

16. The method for configuring a mobile computing device according to claim 12 , further comprising:
folding, using the hinge mechanism, the first and second portions of the body of the mobile computing device so that the flexible display of the mobile computing device wraps around the first and second portions; and
deactivating the electromagnet at the hinge mechanism.

17. A display comprising:
a body configurable by a hinge mechanism into a folded configuration or into an unfolded, flat configuration;
a flexible display attached to the body that is folded or unfolded according to the configuration of the body;
a magnetic element disposed on a back surface of the flexible display; and
an electromagnet in the hinge mechanism of the body that attracts is configured to attract the magnetic element towards the hinge mechanism to maintain the flexible display in a flat configuration when it is unfolded, wherein the electromagnet includes a conductor configured to carry a current in a direction aligned with an axis of rotation of the hinge mechanism.

18. The display according to claim 17 , wherein the flexible display includes an organic light emitting diode (OLED) display.

Assignees

• Google Llc

Inventors

• Tan Wenli
• Cheng Victor
• Chien Vincent
• Ou Davis
• Liao Eugene
• Yeh Han-Wen
• Liu Mike
• Tseng Chun

Classifications

• G06F1/1616

  with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position · CPC title

• G06F1/1652 Primary

  the display being flexible, e.g. mimicking a sheet of paper, or rollable · CPC title

• G06F1/1681

  Details related solely to hinges (hinge details related to the transmission of signals or power are classified in G06F1/1683) · CPC title

• G09G3/2096

  Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167) · CPC title

• H01F7/06

  Electromagnets; Actuators including electromagnets {(electric coils H01F5/00; devices for holding workpieces using electric force B23Q3/15; load-engaging elements for lifting articles electromagnetically B66C1/06; electromagnetic couplings F16D27/00; magnetic brakes F16D63/002; electromagnetically operated valves F16K11/24, F16K31/00; analysing materials by magnetic means G01N27/72, G01N27/80; electromagnets for winding mechanical clocks G04C1/02; electromagnetic relays H01H51/00; windings for salient poles of dynamo-electric machines H02K3/18; electromagnets for telegraphic communication H04L; for arc lamps H05B31/28)} · CPC title