Display apparatus with pixel-aligned electrode

• US 9,024,918 B2
• Filed: 09/26/2012
• Issued: 05/05/2015
• Est. Priority Date: 08/16/2012
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Cok, Ronald Steven
• Primary Examiner(s): Sitta, Grant
• Application Number:
  US13/626,971
• Publication Number:
  US 20140085216A1
• Time in Patent Office: 951 Days
• Field of Search: 345156-175, 345/87, 345/769
• US Class Current: 345/178
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

A display apparatus includes a display including an array of pixels formed in rows and columns. A touch-screen including a transparent dielectric layer having a row side and an opposed column side is located over the display. An array of row electrodes are formed on the row side and an array of column electrodes are formed on the column side. Each of the row and column electrodes extends exclusively over all of the pixels in a corresponding row or column.

Claims

1. A display apparatus, comprising:

a display including an array of pixels formed in display rows and display columns;

a touch-screen including a solid transparent dielectric layer having a row side and an opposed column side located over the display, an array of row electrodes formed on the row side and an array of column electrodes formed on the column side;

wherein each of the row electrodes in a layer extends exclusively over all of the pixels in a corresponding display row and each of the column electrodes in a layer extends exclusively over all of the pixels in a corresponding display column, so that all of the pixels in each display row or display column are completely covered by a single row electrode or column electrode only and no other row electrode or column electrode covers any portion of any of the pixels in the display row or display column, and so that each row electrode or column electrode only covers all of the pixels in a display row or display column and no row electrode or column electrode covers at least a portion of one but less than all of the pixels in a display row or display column.

2. The display apparatus of claim 1, wherein one or more of the row or column electrodes extends exclusively over all of the pixels in multiple adjacent rows or columns.

3. The display apparatus of claim 1, wherein the row or column electrodes include micro-wires.

4. The display apparatus of claim 1, wherein the row or column electrodes are partially transparent.

5. The display apparatus of claim 1, wherein the display includes a display substrate and the transparent dielectric layer is in a common stack with the display substrate.

6. The display apparatus of claim 1, wherein the transparent dielectric layer is an electrode substrate having a first electrode substrate side and a second electrode substrate side opposed to the first electrode substrate side and the row or column electrodes are formed on or over the first electrode substrate side.

7. The display apparatus of claim 1, wherein the display includes a display substrate having a first display substrate side and a second display substrate side opposed to the first display substrate side and the pixels are formed on or over the first display substrate side.

8. The display apparatus of claim 7, wherein the row or column electrodes are formed on or over the second display substrate side.

9. The display apparatus of claim 7, wherein the row or column electrodes are formed on or over the first display substrate side.

10. The display apparatus of claim 7, wherein the transparent dielectric layer is the display substrate.

11. The display apparatus of claim 7, further including a display cover located over the pixels and the electrodes are formed on or over the display cover.

12. The display apparatus of claim 7, further including a display cover located over the pixels and the transparent dielectric layer is the display cover.

13. The display apparatus of claim 7, wherein the display substrate is laminated to the transparent dielectric layer.

14. The display apparatus of claim 1, wherein adjacent rows or columns of pixels are offset.

15. The display apparatus of claim 14, wherein one or more row or column electrodes are not rectangular.

16. The display apparatus of claim 15, wherein one or more row or column electrodes have a crenellated pattern.

17. The display apparatus of claim 1, wherein each pixel is completely covered by a single row electrode and a single column electrode.