Semi-rigid electronic device with a flexible display

• US 8,764,255 B2
• Filed: 10/10/2012
• Issued: 07/01/2014
• Est. Priority Date: 10/10/2012
• Status: Active Grant

• Current Assignee: Universal Display Corporation
• Original Assignee: Universal Display Corporation
• Inventors: Hack, Michael, Krall, Emory, Ma, Ruiqing, Mandlik, Prashant
• Primary Examiner(s): WALFORD, NATALIE K
• Application Number:
  US13/648,911
• Publication Number:
  US 20140098549A1
• Time in Patent Office: 629 Days
• Field of Search: None
• US Class Current: 362/418
• CPC Class Codes: F21V 21/14 Adjustable mountings
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 1/1652 the display being flexible, e.g. mimicking a sheet of paper, or rollable
• CPC Class Codes: G09F 9/301 flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
• CPC Class Codes: H05K 7/02 Arrangements of circuit components or wiring on supporting structure
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 77/111 Flexible substrates

Abstract

A semi-rigid electronic device is disclosed that includes a flexible panel and a housing. The housing may have a physical dimension L, such as length, height, or a diagonal. The minimum bending device radius of the device along the dimension L may be L/pi when held at an edge. The bending radius increases the more rigid the device. The housing, electronic components, and display may each contribute to the flexibility of the overall device. The housing and/or the flexible panel may also include one or more ribs to constrain movement of the semi-rigid device.

Claims

1. A device comprising:

a flexible panel; and

a housing having a physical dimension L;

wherein the device is semi-rigid, and the minimum bending device radius along the physical dimension L is L/pi when the device is held at an edge of the device; and

wherein the flexible panel comprises a panel selected from the group consisting of;

a display panel and a lighting panel.

2. The device as recited in claim 1, wherein the flexible panel comprises a display panel selected from the group consisting of:

an emissive panel, a reflective panel, and an LCD.

3. The device as recited in claim 1, further comprising a flexible circuit board disposed within the housing, the flexible circuit board providing circuitry configured to control the flexible panel.

4. The device as recited in claim 3, further comprising a processor to execute an operating system and one or more applications.

5. The device as recited in claim 1, further comprising a plurality of ribs configured to maintain the device in a flat configuration in the absence of a force applied by the user.

6. The device as recited in claim 5, wherein the plurality or ribs are configurable from a first rib configuration that prevents the flexible panel from flexing in at least one direction to a second rib configuration that allows the flexible panel to flex in the at least one direction.

7. The device as recited in claim 5, further comprising a plurality of stiffening elements physically connected to the plurality of ribs which, when activated, maintain the plurality of ribs in the second rib configuration.

8. The device as recited in claim 1, wherein the device is sufficiently rigid to maintain a substantially planar configuration in the absence of a force applied by the user, when only a portion of the device is supported by a structure disposed under the device.

9. The device as recited in claim 1, wherein the device maintains a constant curvature in the absence of a continual application of force by a user.

10. The device as recited in claim 1, wherein the device is sufficiently rigid to maintain a substantially planar configuration in the absence of a force applied by the user, when only about half the device is supported by the structure.

11. The device as recited in claim 1, wherein the flexible panel comprises a flexible AMOLED.

12. The device as recited in claim 1, wherein the flexible panel comprises a flexible OLED.

13. The device as recited in claim 1, wherein the device has a default non-zero curvature in the absence of a force applied by a user.

14. The device as recited in claim 11, wherein the flexible panel is configured to emit light from a concave surface of the device.

15. The device as recited in claim 1, wherein the largest surface area of the device is not more than about 20% larger than the area of the flexible panel.

16. The device as recited in claim 1, wherein the width of the device is not more than about 2 mm larger than the width of the flexible panel.

17. The device as recited in claim 1, wherein the height of the device is not more than about 2 mm larger than the height of the flexible panel.

18. The device as recited in claim 1, further comprising a touch screen.

19. The device as recited in claim 1, wherein the device has a non-uniform thickness.

20. The device as recited in claim 19, wherein the device has a greater thickness at the edge than in the center of the device.

21. The device as recited in claim 1, wherein at least a portion of the edge of the device has a different degree of flexibility than a central portion of the device.

22. The device as recited in claim 1, wherein the housing comprises a material selected from the group consisting of:

thin glass, metal foils such as stainless steel and aluminum, plastic films such as PET and PEN, and composite materials.

23. The device as recited in claim 1, wherein the flexible panel comprises a substrate selected from the group consisting of:

rubber, silicon, plastic, metal (such as spring steel), paper, or a composite material.

24. The device as recited in claim 1, wherein the bending radius of the device is in the range between L/pi and 1000 L/pi.

25. The device as recited in claim 1, wherein the bending radius of the device is in the range between L/pi and 100 L/pi.

26. The device as recited in claim 1, wherein L is the largest outer physical dimension of the device.

27. The device as recited in claim 1, wherein the device comprises an active matrix backplane.