Display device and vehicle display device

Abstract

A display device includes a flexible display, a curvature deformation layer, and a button deformation layer. The flexible display includes a display surface and a back surface facing each other. The curvature deformation layer is disposed below the back surface. The curvature deformation layer has a variable curvature to adapt to changes in the curvature shape of the flexible display. The button deformation layer is sandwiched between the back surface and the curvature deformation layer. The button deformation layer includes a plurality of button deformation portions. Each button deformation portion has a first shape in a first state, and each button deformation portion has a second shape in a second state, wherein the second shape is different from the first shape.

Claims

1. A display device comprising: a flexible display including a display surface and a back surface opposite to each other; a curvature deformation layer disposed below the back surface, wherein the curvature deformation layer has a variable curvature to correspond to changing the curvature shape of the flexible display; and a button deformation layer sandwiched between the back surface and the curvature deformation layer, wherein the button deformation layer includes a plurality of button deformation portions, each of the button deformation portions having a first shape in a first state, and each of the button deformation portions having a second shape in a second state, wherein the second shape is different from the first shape.

2. The display device as claimed in claim 1, wherein the curvature deformation layer comprises: a first electrode; a second electrode located on one side of the first electrode; and an electrodeformable film sandwiched between the first electrode and the second electrode.

3. The display device as claimed in claim 1, wherein each of the button deformation portions includes three shapes: protruding toward the flexible display, recessed away from the flexible display, or neither protruding nor recessed relative to the flexible display, wherein the first shape is one of the three shapes and the second shape is another of the three shapes.

4. The display device as described in claim 3, wherein: The button deformation layer further includes a deformation body, wherein the deformation body includes a surface corresponding to and adjacent to the back surface, the deformation body includes a plurality of units, and the button deformation portions are correspondingly disposed in the units; each of the button deformation portions includes an actuating element and has a chamber, an inlet, and an outlet located in a corresponding one of the units, wherein the inlet and the outlet are respectively fluidly connected to the chamber, and the actuating element is disposed on a top surface of a chamber, the actuating element being configured to move the top of the corresponding one of the units toward or away from the back surface, thereby causing a fluid to flow into the chamber from the inlet or out of the chamber from the outlet; and the display device further includes a fluid supply source, wherein the fluid supply source is fluidly connected to the chambers of the button deformation portions.

5. The display device as claimed in claim 4, wherein each of the button deformation portions further comprises: a first serpentine channel fluidly connected to the inlet; and a second serpentine channel fluidly connected to the outlet, wherein the first serpentine channel and the second serpentine channel are located on opposite sides of the chamber from the actuation element.

6. The display device as claimed in claim 5, wherein each of the first serpentine channel and the second serpentine channel meanders on a plane parallel to or perpendicular to the surface.

7. The display device as described in claim 5, wherein: The first serpentine flow channel includes: a first flow channel portion; and a first connecting portion, wherein two opposing ends of the first connecting portion are respectively connected to the inlet and the first flow channel portion, and one radial dimension of the first connecting portion is larger than one radial dimension of the first flow channel portion; and the second serpentine flow channel includes: a second flow channel portion; and a second connecting portion, wherein two opposing ends of the second connecting portion are respectively connected to the outlet and the second flow channel portion, and one radial dimension of the second connecting portion is larger than one radial dimension of the second flow channel portion.

8. The display device as claimed in claim 4, wherein the actuating element includes a piezoelectric element and an electrode located on the piezoelectric element.

9. The display device as claimed in claim 8, wherein the electrodes of the actuators of the key deformation portions are electrically independent of each other.

10. The display device as claimed in claim 8, wherein the key deformable portions are in a plurality of groups, and the electrodes of the actuating elements of the key deformable portions in each of the groups are connected in parallel.

11. The display device as claimed in claim 9 or 10, wherein the chambers of the key deformation portions are respectively fluidly connected to the fluid supply source through a plurality of flow channels.

12. The display device as claimed in claim 9 or 10, wherein the chambers of the key deformation portions are fluidly connected to the fluid supply source through a common flow channel.

13. The display device as claimed in claim 4, wherein the top edge of one of the chambers of each of the button deformation portions is convex arc-shaped.

14. The display device as described in claim 4, wherein: When the corresponding unit is neither protruding nor recessed from the surface, the top surface of the cavity is separated from the surface by a first distance; when the corresponding unit protrudes toward the flexible display, the top surface of the cavity is separated from the top surface of the cavity when the corresponding unit is neither protruding nor recessed from the surface by a second distance, the second distance being greater than the first distance.

15. The display device as described in claim 4, wherein: When the deformable parts of the buttons neither protrude nor recede relative to the flexible display, the surface is a flat surface; when the deformable parts of the buttons protrude toward the flexible display, the units protrude from the surface toward the back side and push up the display surface above; and when the deformable parts of the buttons are recessed away from the flexible display, the units move away from the back side and are recessed into the surface.

16. The display device as claimed in claim 3, wherein the curvature shape of the flexible display is a concave arc shape comprising a plurality of curvature segments, the key deformation portions are correspondingly located on the curvature segments, and the smaller the radius of curvature of the plurality of curvature segments corresponding to the key deformation portions, the greater the degree of protrusion of the key deformation portions when protruding toward the flexible display.

17. The display device as claimed in claim 3, wherein the curvature shape of the flexible display is a convex arc shape comprising a plurality of curvature segments, the key deformation portions are correspondingly located on the curvature segments, and the larger the radii of curvature of the plurality of curvature segments corresponding to the key deformation portions, the greater the degree of protrusion of the key deformation portions when protruding toward the flexible display.

18. The display device as claimed in claim 3, wherein the curvature shape of the flexible display includes a concave arc segment and a convex arc segment with the same radius of curvature, the key deformation portions are correspondingly located below the concave arc segment and the convex arc segment, wherein when the key deformation portions protrude toward the flexible display, the protrusion height of the key deformation portions located in the concave arc segment is greater than the protrusion height of the key deformation portions located in the convex arc segment.

19. The display device as claimed in claim 1, wherein the curvature deformation layer comprises a plurality of segments having a plurality of curvatures.

20. The display device as claimed in claim 1, wherein the flexible display includes a display area and a button area, and the button deformation layer includes a heat dissipation channel located below the display area.

21. A vehicle display device, comprising: a flexible display disposed in a cockpit of a vehicle body, and including a display surface and a back surface facing each other; a curvature deformation layer disposed below the back surface, wherein the curvature deformation layer has a variable curvature to change the curvature shape of the flexible display; and a button deformation layer sandwiched between the back surface and the curvature deformation layer, wherein the button deformation layer includes a plurality of button deformation portions, each of the button deformation portions having a first shape in a first state, and each of the button deformation portions having a second shape in a second state, wherein the second shape is different from the first shape.

22. The automotive display device as claimed in claim 21, wherein the curvature deformation layer is configured to vary the variable curvature so that the curvature shape of the flexible display changes to be more oriented towards one of the driver's seats in the cockpit.

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