Electronic device with capacitive touch-sensitive display

• US 8,780,028 B2
• Filed: 01/27/2012
• Issued: 07/15/2014
• Est. Priority Date: 01/27/2012
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Lai, Jackson Chi Sun
• Primary Examiner(s): HALEY, JOSEPH R
• Application Number:
  US13/360,244
• Publication Number:
  US 20130194196A1
• Time in Patent Office: 900 Days
• Field of Search: None
• US Class Current: 345/87
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• 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 3/0443 using a single layer of sensing electrodes
• 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

Abstract

An assembly includes a substrate, scanning electrodes and sense electrodes disposed on the substrate, and color filter and black matrix disposed in an arrangement on the scanning electrodes and sense electrodes. The scanning electrodes and sense electrodes are disposed between the substrate and the arrangement.

Claims

1. An assembly comprising:

a substrate;

scanning electrodes and sense electrodes disposed on a face of the substrate;

color filter and conductive black matrix disposed in an arrangement on the scanning electrodes and sense electrodes, wherein the scanning electrodes and sense electrodes are disposed between the substrate and the arrangement;

at least one insulator disposed between the scanning electrodes and the conductive black matrix and between the sense electrodes and the conductive black matrix;

wherein the black matrix electrically couples the scanning electrodes to bond pads of a thin-film transistor display.

2. The assembly according to claim 1, wherein the scanning electrodes and the sense electrodes are disposed directly on the substrate.

3. The assembly according to claim 1, comprising electrical conductors coupling sense electrodes.

4. The assembly according to claim 1, wherein the scanning electrodes are aligned with the black matrix.

5. The assembly according to claim 1, comprising a shield disposed between the sense electrodes and the arrangement.

6. The assembly according to claim 1, wherein the scanning electrodes are separated from the sense electrodes by an electrode insulator.

7. A touch-sensitive display comprising:

a thin-film transistor structure;

an assembly disposed on the thin-film transistor structure, the assembly comprising;

a substrate;

color filter and conductive black matrix disposed in an arrangement between the substrate and the thin-film transistor structure;

scanning electrodes and sense electrodes disposed between the substrate and the arrangement;

at least one insulator disposed between the scanning electrodes and the conductive black matrix and between the sense electrodes and the black matrix,

wherein the conductive black matrix electrically couples the scanning electrodes to bonding pads of the thin-film transistor structure.

8. The touch-sensitive display according to claim 7, wherein the scanning electrodes and the sense electrodes are disposed directly on the substrate.

9. The touch-sensitive display according to claim 7, comprising electrical conductors coupling sense electrodes.

10. The touch-sensitive display according to claim 7, wherein the scanning electrodes are aligned with the black matrix.

11. The touch-sensitive display according to claim 7, comprising a shield disposed between the sense electrodes and the arrangement.

12. An electronic device comprising:

a thin film transistor structure;

an assembly disposed on the thin-film transistor structure, the assembly comprising;

a substrate;

color filter and conductive black matrix disposed in an arrangement between the substrate and the thin-film transistor structure;

scanning electrodes and sense electrodes disposed between the substrate and the arrangement;

at least one insulator disposed between the scanning electrodes and the conductive black matrix and between the sense electrodes and the black matrix,

wherein the conductive black matrix electrically couples the scanning electrodes to bonding pads of the thin-film transistor structure; and

a controller coupled to the scanning electrodes and the sense electrodes, and configured to detect touches on the touch-sensitive display.

13. The electronic device according to claim 12, wherein the controller is configured to detect the touches during horizontal blanking periods of the thin-film transistor structure.