Backplanes for electro-optic displays

• US 10,527,899 B2
• Filed: 05/25/2017
• Issued: 01/07/2020
• Est. Priority Date: 05/31/2016
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: Amundson, Karl Raymond, Lu, Yi
• Primary Examiner(s): Beatty, Collin X
• Application Number:
  US15/604,797
• Publication Number:
  US 20170343876A1
• Time in Patent Office: 957 Days
• Field of Search: 359245, 359250, 359252, 359265, 359267, 359270, 359271, 359274, 359275, 359296, 345 49, 345 58, 345 84, 345 88, 345 92, 345 98, 345100, 345105, 349 38, 349 42, 349 43, 349110, 349111, 257 59, 257 98, 257212, 257213, 257E27111, 257E29278, 257E29282
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 1/136218 Shield electrodes
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52

Abstract

A backplane for an electro-optic display that includes a data line, a transistor, a pixel electrode connected to the data line via the transistor, the pixel electrode positioned adjacent to part of the data line so as to create a data line/pixel electrode capacitance. The backplane further including a shield electrode disposed adjacent to at least part of the data line so as to reduce the data line/pixel electrode capacitance.

Claims

1. A backplane for an electro-optic display comprising:

a data line;

a transistor;

a pixel electrode connected to the data line via the transistor, the pixel electrode positioned adjacent to part of the data line so as to create a data line/pixel electrode capacitance; and

a shield electrode disposed adjacent to at least part of the data line so as to reduce the data line/pixel electrode capacitance.

2. A backplane according to claim 1, wherein the shield electrode extends substantially parallel to the data line.

3. A backplane according to claim 1, wherein the shield electrode has substantially the same shape as the data line.

4. A backplane according to claim 1, wherein the shield electrode is wider than the data line.

5. A backplane according to claim 1, wherein the data line and the shield electrode are positioned on a same device layer.

6. A backplane according to claim 1, wherein the data line and the shield electrode are positioned on different device layers.

7. A backplane according to claim 1, wherein part of the shield electrode extends underneath the pixel electrode.

8. An electro-optic display comprising a backplane according to claim 1, further comprising an electro-optic medium that is a rotating bichrome member or electrochromic medium.

9. An electro-optic display according to claim 8, wherein the electro-optic medium is an electrophoretic medium comprising a plurality of charged particles in a fluid and capable of moving through the fluid on application of an electric field to the electro-optic medium.