In-Plane Switching Display Devices

• US 20080224993A1
• Filed: 10/10/2006
• Published: 09/18/2008
• Est. Priority Date: 10/14/2005
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Johnson, Mark Thomas
• Application Number:
  US12/089,771
• Publication Number:
  US 20080224993A1
• Time in Patent Office: Days
• US Class Current: 345/107
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/167 by electrophoresis

Abstract

A display device comprises an array of rows and columns of pixels, wherein each pixel (48) comprises portions of first and second row-wise electrodes (42) and portions of first and second column-wise electrodes (34). This pixel arrangement has a unique combination of four electrodes dedicated to each pixel, and arranged as two pairs of parallel electrodes. The parallel pairs of electrodes can easily be manufactured, and each pair can be on a different substrate, or both pairs can be on the same substrate. This structure is used in electrophoretic displays.

Claims

1. A display device, comprising an array of rows and columns of pixels, wherein each pixel comprises portions of first and second row-wise electrodes and portions of first and second column-wise electrodes.

2. A device as claimed in claim 1, wherein each pixel is bounded by the first and second row-wise electrodes, which are not shared with any other rows, and the first and second column-wise electrodes, which are not shared with any other columns.

3. A device as claimed in claim 1, wherein one of first and second row-wise or column-wise electrodes is shared with another row or column, and wherein electrical connection is made outside the display area.

4. A device as claimed in claim 1, wherein the first and second row-wise electrodes are provided on a first substrate, and the first and second column-wise electrodes are provided on a second substrate.

5. A device as claimed in claim 1, wherein the first and second row-wise electrodes and the first and second column-wise electrodes are provided on a common substrate.

6. A device as claimed in claim 5, wherein the first and second row-wise electrodes are provided as a first patterned metal layer and first and second column-wise electrodes are provided as a second patterned metal layer, wherein an insulating layer is located between the metal layers.

7. A device according to claim 1, wherein electrical contacts are made to all four sides of the display.

8. A device as claimed in claim 1, wherein the column-wise electrodes comprise a shielding electrode and a data electrode, and the row-wise electrodes comprise a select electrode.

9. A device as claimed in claim 8, wherein the data electrodes connects to pixel electrode pads.

10. A device as claimed in claim 1, wherein the column-wise electrodes comprise first and second data electrodes and the row-wise electrodes comprise a select electrode.

11. A device as claimed in claim 10, wherein one of the data electrodes connects to pixel electrode pads.

12. A device as claimed in claim 1, comprising an electrophoretic passive matrix display device.

13. A device as claimed in claim 12, wherein each pixel comprises an electrophoretic fluid disposed between opposing substrates.