DISPLAY APPARATUS WITH PIXEL-ALIGNED GROUND MESH

• US 20140111442A1
• Filed: 10/19/2012
• Published: 04/24/2014
• Est. Priority Date: 09/26/2012
• Status: Active Grant

• Current Assignee: Eastman Kodak Company
• Original Assignee: Ronald Steven Cok
• Inventors: COK, RONALD STEVEN, Burberry, Mitchell Stewart, Sanger, Kurt Michael
• Granted Patent: US 9,164,630 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Abstract

Display apparatus with reduced susceptibility to electro-magnetic interference includes a display including an array of pixels and a ground mesh located in proximity to the display. The ground mesh includes a plurality of electrically connected ground lines located between the pixels, so that electro-magnetic radiation emitted or received by the display is reduced.

Claims

1. Display apparatus with reduced susceptibility to electro-magnetic interference, comprising:

a display including an array of pixels; and

a ground mesh located in proximity to the display, the ground mesh including a plurality of electrically connected ground lines located between the pixels, so that electro-magnetic radiation emitted or received by the display is reduced.

2. The display apparatus of claim 1, wherein the ground lines are in a common layer.

3. The display apparatus of claim 2, wherein the ground lines are in a common plane.

4. The display apparatus of claim 1, wherein the ground lines are metal wires or metal traces.

5. The display apparatus of claim 1, wherein the ground lines are micro-wires.

6. The display apparatus of claim 1, wherein the ground lines are opaque.

7. The display apparatus of claim 1, wherein the ground lines form an interwoven or intertwined structure.

8. The display apparatus of claim 1, wherein the ground lines form an arrangement of electrical conductors spaced apart by regular, uniform openings.

9. The display apparatus of claim 1, wherein the pixels are separated by inter-pixel gaps in at least one dimension and the ground lines are located in the inter-pixel gaps.

10. The display apparatus of claim 9, wherein the ground lines substantially fill the inter-pixel gaps.

11. The display apparatus of claim 9, wherein the ground lines do not substantially fill the inter-pixel gaps so that the ground lines do not occlude light controlled by the pixels when viewed by a user within a pre-defined viewing angle.

12. The display apparatus of claim 9, wherein the pixels are arranged in rows and columns, the rows of pixels separated by row inter-pixel gaps, the columns of pixels separated by column inter-pixel gaps, and the ground lines are located in the row inter-pixel gaps, the column inter-pixel gaps, or both the row inter-pixel gaps and the column inter-pixel gaps.

13. The display apparatus of claim 12, wherein the ground lines in the row inter-pixel gaps have a different width than the ground lines in the column inter-pixel gaps.

14. The display apparatus of claim 1, wherein the display further includes a display ground and the ground mesh is electrically connected to the display ground.

15. The display apparatus of claim 1, further including a touch screen located in proximity to the ground mesh and wherein the ground mesh is located between the touch screen and the display.

16. The display apparatus of claim 1, wherein the touch screen further includes a touch screen and a touch-screen ground and the ground mesh is electrically connected to the touch-screen ground.

17. The display apparatus of claim 16, wherein the display further includes a display ground and the ground mesh is electrically connected to the display ground and to the touch-screen ground.

18. The display apparatus of claim 12, wherein the display is located within 1 mm of the ground mesh.

19. The display apparatus of claim 12, wherein the ground lines are black.

20. The display apparatus of claim 12, wherein the ground lines are colored.

21. The display apparatus of claim 12, wherein the ground lines include a first electrically conductive layer and a second light-absorbing layer.