Producing electro-optic display with seamless front surface

• US 9,087,488 B1
• Filed: 01/25/2012
• Issued: 07/21/2015
• Est. Priority Date: 09/15/2011
• Status: Active Grant

• Current Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Original Assignee: Amazon Technologies, Inc. (Amazon.com, Inc.)
• Inventors: Zehner, Robert
• Primary Examiner(s): Nguyen, Kimnhung
• Application Number:
  US13/358,109
• Time in Patent Office: 1,273 Days
• Field of Search: 345 84- 87, 345/102, 345/107, 359/245, 359/296
• US Class Current: 1/1
• CPC Class Codes: B32B 2037/268 Release layers
• CPC Class Codes: B32B 2307/20 having particular electrical or magnetic properties, e.g. piezoelectric
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2315/02 Ceramics
• CPC Class Codes: B32B 2315/08 Glass
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: B32B 2457/20 Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 37/0076 characterised in that the layers are not bonded on the totality of their surfaces
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 37/26 with at least one layer which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/16755 Substrates
• CPC Class Codes: G02F 1/1679 Gaskets; Spacers; Sealing of cells; Filling or closing of cells
• CPC Class Codes: G02F 2201/501 Blocking layers, e.g. against migration of ions
• CPC Class Codes: G09F 9/372 the positions of the elements being controlled by the application of an electric field
• CPC Class Codes: G09G 3/2022 using sub-frames
• CPC Class Codes: G09G 3/344 : based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167
• CPC Class Codes: G09G 3/346 : based on modulation of the reflection angle, e.g. micromirrors micromirrors devices per se G02B26/0833

Abstract

Methods and systems for producing an electro-optic display with a barrier layer for a seamless front surface of a user device. The electro-optic display may include a barrier layer, supported by a release film, disposed above a layer of electro-optic medium disposed above a backplane. The barrier layer may have dimensions greater than the electro-optic layer, but less than the backplane. An underfill edge seal is created under the barrier layer and release firm, and the release film is removed. A front-surface material is disposed above the barrier layer. The dimensions of the front-surface material may be greater than or equal to the dimensions of the backplane to create a seamless front surface on the user device.

Claims

1. An electro-optic display comprising:

a backplane comprising at least one electrode;

a first layer of lamination adhesive disposed above the backplane;

a layer of electro-optic material disposed above the first layer of lamination adhesive;

a second layer of lamination adhesive disposed above the layer of electro-optic material;

a barrier layer disposed above the second layer of lamination adhesive;

an underfill edge seal created by a sealing material disposed to extend from peripheral portions of the backplane to the barrier layer;

a third layer of adhesive disposed above the barrier layer; and

a front-surface material disposed above the third layer of adhesive, wherein a length and a width of the front-surface material are, respectively, equal to or greater than a length and a width of the backplane, wherein a length and a width of the barrier layer are, respectively, greater than a length and a width of the layer of electro-optic material and are, respectively, less than the length and the width of the backplane, and wherein the length and the width of the barrier layer are, respectively, less than the length and the width of the backplane.

2. The electro-optic display of claim 1, wherein the third layer of adhesive is disposed above the barrier layer after a release film is removed.

3. The electro-optic display of claim 2, wherein a length and a width of the release film are, respectively, greater than the length and the width of the barrier layer.

4. The electro-optic display of claim 1, wherein the third layer of adhesive is a layer of substantially optically clear adhesive between the barrier layer and the front-surface material.

5. The electro-optic display of claim 1, wherein the front-surface material is glass.

6. The electro-optic display of claim 5, wherein the glass comprises a masking to mask an area of the layer of electro-optic material.

7. The electro-optic display of claim 1, wherein the front-surface material comprises one or more layers of a capacitive touch sensor.

8. The electro-optic display of claim 1, wherein the layer of electro-optic material comprises an electrophoretic material comprising a plurality of electrically charged particles disposed in a fluid.

9. The electro-optic display of claim 8, wherein the electrically charged particles and the fluid are confined within a plurality of capsules or microcells.

10. The electro-optic display of claim 8, wherein the electrically charged particles and the fluid are present as a plurality of discrete droplets surrounded by a continuous phase comprising a polymeric material.

11. The electro-optic display of claim 8, wherein the fluid is gaseous.

12. The electro-optic display of claim 1, wherein the backplane comprises a thin-film transistor (TFT) disposed above a glass substrate.

13. The electro-optic display of claim 1, wherein the layer of electro-optic material comprises:

a Polyethylene terephthalate (PET) substrate;

a layer of indium tin oxide (ITO) disposed above the PET substrate; and

an electro-optic medium configured to operate in first and second display states differing in at least one optical property, the electro-optic medium is configured to change from its first to second display states by application of an electric filed to the electro-optic material.

14. A display comprising:

a backplane comprising at least one electrode;

an electro-optic display disposed above the backplane, wherein the electro-optic display is smaller in width and length than the backplane to leave a peripheral portion of the backplane extending beyond edges of the electro-optic display;

a barrier layer disposed above the electro-optic display, wherein barrier layer is greater in width and length than the electro-optic display to create an overhang under which sealing material can be disposed to create an underfill edge seal between the peripheral portion of the backplane and the overhang; and

a front-surface material disposed above the barrier layer, wherein the front-surface material is equal to or greater in width and length than the backplane.

15. The display of claim 14, wherein the electro-optic display comprises:

a first layer of lamination adhesive disposed above the backplane;

a layer of electro-optic material disposed above the first layer of lamination adhesive;

a second layer of lamination adhesive disposed above the layer of electro-optic material, wherein the first and second layers of lamination adhesive are to laminate the backplane and the layer of electro-optic material; and

a front substrate comprising at least one electrode disposed above the second layer of lamination adhesive, wherein the first and second layers of lamination adhesive are to laminate the backplane, the layer of electro-optic material and the front substrate.

16. The display of claim 15, wherein the layer of electro-optic material comprises an electrophoretic material comprising a plurality of electrically charged particles disposed in a fluid, and wherein the electrically charged particles and the fluid are confined within a plurality of capsules or microcells.

17. The display of claim 15, wherein the front substrate is Polyethylene terephthalate (PET) and the at least one electrode of the front substrate is a layer of indium tin oxide (ITO) disposed above or below the PET.

18. The display of claim 14, further comprising a layer of adhesive disposed above the barrier layer after a release film is removed.

19. The display of claim 18, wherein a length and a width of the release film are, respectively, greater than the length and the width of the barrier layer.

20. The display of claim 14, wherein the front-surface material is glass.

21. The display of claim 20, wherein the glass comprises a masking to mask an area of the electro-optic display.

22. A user device comprising:

a memory device;

an input device;

an electro-optic display; and

a processor coupled to the memory device, the input device, and the electro-optic display, wherein the processor is configured to present information in visual form to a user, wherein the electro-optic display comprises;

a backplane;

a layer of electro-optic material;

a barrier layer;

an edge seal between the barrier layer and the backplane; and

a front-surface material disposed above the barrier layer, the front-surface material to provide a seamless front surface of the electro-optic display, wherein a length and a width of the front-surface material are, respectively, equal to or greater than a length and a width of the backplane.

23. The user device of claim 22, wherein the layer of electro-optic material is configured to operate in first and second display states differing in at least one optical property, the electro-optic display is configured to change between its first to second display states by application of an electric filed to the layer of electro-optic material by the processor.

24. The user device of claim 22, further comprising:

a modem coupled to the processor; and

an antenna coupled to the modem.

25. A user device comprising:

a memory device;

an input device;

a processor coupled to the memory device and the input device, wherein the processor is configured to present information in visual form to a user; and

an electro-optic display structure coupled to the processor, wherein the electro-optic display comprises;

a backplane comprising at least one electrode;

an electro-optic display layer disposed above the backplane, wherein the electro-optic display layer is smaller in width and length than the backplane to leave a peripheral portion of the backplane extending beyond edges of the electro-optic display layer;

a barrier layer disposed above the electro-optic display layer, wherein barrier layer is greater in width and length than the electro-optic display layer to create an overhang under which sealing material can be disposed to create an underfill edge seal between the peripheral portion of the backplane and the overhang; and

a front-surface material disposed above the barrier layer, wherein the front-surface material is equal to or greater in width and length than the backplane.

26. The user device of claim 25, wherein the electro-optic display layer is configured to operate in first and second display states differing in at least one optical property, the electro-optic display layer is configured to change between its first to second display states by application of an electric filed to the electro-optic display layer by the processor.

27. The user device of claim 25, further comprising:

a modem coupled to the processor; and

an antenna coupled to the modem.

28. The user device of claim 25, wherein the electro-optic display structure comprises:

a first layer of lamination adhesive disposed above the backplane;

a layer of electro-optic material disposed above the first layer of lamination adhesive;

a second layer of lamination adhesive disposed above the layer of electro-optic material, wherein the first and second layers of lamination adhesive are to laminate the backplane and the layer of electro-optic material; and

a front substrate comprising at least one electrode disposed above the second layer of lamination adhesive, wherein the first and second layers of lamination adhesive are to laminate the backplane, the layer of electro-optic material and the front substrate.

29. The user device of claim 28, wherein the layer of electro-optic material comprises an electrophoretic material comprising a plurality of electrically charged particles disposed in a fluid, and wherein the electrically charged particles and the fluid are confined within a plurality of capsules or microcells.

30. The user device of claim 28, wherein the front substrate is Polyethylene terephthalate (PET) and the at least one electrode of the front substrate is a layer of indium tin oxide (ITO) disposed above or below the PET.

31. The user device of claim 25, further comprising a layer of adhesive disposed above the barrier layer after a release film is removed.