Display device including a conductive portion covering an area in which clock signal lines and touch signal lines overlap

• US 10,642,390 B2
• Filed: 07/24/2017
• Issued: 05/05/2020
• Est. Priority Date: 07/29/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Lee, Jaehyun, Ku, Keunlim, Jun, Sanghyun, Jung, Changyong
• Primary Examiner(s): Awad, Amr A
• Assistant Examiner(s): Lui, Donna V
• Application Number:
  US15/658,351
• Publication Number:
  US 20180032189A1
• Time in Patent Office: 1,016 Days
• Field of Search: None
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• 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 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• 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 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0819 used for counteracting undesired variations, e.g. feedback or autozeroing
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2380/02 Flexible displays
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: H10K 2102/311 : Flexible OLED
• CPC Class Codes: H10K 50/844 : Encapsulations
• CPC Class Codes: H10K 59/12 : Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/131 : Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 : OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/873 : Encapsulations
• CPC Class Codes: H10K 77/111 : Flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells

Abstract

A display device includes a circuit layer having a driving circuit layer with a plurality of clock signal lines, a touch detection unit having a touch detection part and a plurality of touch signal lines electrically connected to the touch detection unit, and a conductive portion disposed between the plurality of clock signal lines and the plurality of touch signal lines and configured to cover an overlapping area where the plurality of clock signal lines and the plurality of touch signal lines overlap.

Claims

1. A display device comprising:

a base layer;

a circuit layer disposed on the base layer and comprising a plurality of clock signal lines;

an organic light emitting diode disposed on the circuit layer and comprising a first electrode, an organic light emitting layer disposed on the first electrode, and a second electrode disposed on the organic light emitting layer;

a thin film sealing layer disposed on the organic light emitting diode;

a plurality of touch signal lines disposed on the thin film sealing layer; and

a conductive portion disposed between the plurality of clock signal lines and the plurality of touch signal lines and extending through an overlapping area where at least some of the clock signal lines and at least some of the touch signal lines overlap each other when viewed in a plan view,

wherein;

a plurality of first through holes are defined in the conductive portion, and each of the plurality of first through holes is surrounded by the conductive portion when viewed in the plan view; and

the plurality of first through holes do not overlap the overlapping area in the plan view.

2. The display device of claim 1, wherein the conductive portion is disposed on the same layer as the second electrode.

3. The display device of claim 2, wherein the second electrode extends toward the conductive portion and the second electrode and the conductive portion are connected to each other.

4. The display device of claim 2, wherein the second electrode is spaced apart from the conductive portion.

5. The display device of claim 1, wherein a same level of voltage is provided to the conductive portion and the second electrode.

6. The display device of claim 1, wherein the conductive portion is disposed on the same layer as one of the first electrode and the second electrode.

7. The display device of claim 1, wherein the plurality of first through holes do not overlap the plurality of clock signal lines.

8. The display device of claim 1, wherein the plurality of first through holes do not overlap the plurality of touch signal lines.

9. The display device of claim 1, wherein the conductive portion comprises:

a first area, where the plurality of first through holes are not defined, overlapping at least one of the clock signal lines and at least one of the touch signal lines;

a second area comprising an area exposed by the plurality of first through holes having a first area density of holes; and

a third area comprising an area exposed by the plurality of first through holes having a second area density of holes lower than the first area density.

10. The display device of claim 9, wherein a number of the first through holes defined in the second area per a first surface area is greater than a number of the first through holes defined in the third area per the first surface area.

11. The display device of claim 9, wherein a size of the first through holes defined in the second area is greater than a size of the first through holes defined in the third area.

12. The display device of claim 1, wherein the conductive portion comprises:

a first conductive layer disposed on the same layer as the first electrode and having the plurality of first through holes defined therethrough; and

a second conductive layer disposed on the same layer as the second electrode.

13. The display device of claim 12, wherein the second conductive layer overlaps the plurality of first through holes.

14. The display device of claim 12, wherein a plurality of second through holes are defined in the second conductive layer and the plurality of first through holes and the plurality of second through holes do not overlap each other.

15. The display device of claim 12, wherein a plurality of second through holes are defined in the second conductive layer and the plurality of second through holes are not overlapped with the plurality of touch signal lines or the plurality of clock signal lines.

16. The display device of claim 12, wherein the plurality of first through holes do not overlap the plurality of clock signal lines.

17. The display device of claim 12, wherein the plurality of first through holes do not overlap the plurality of touch signal lines.

18. The display device of claim 12, wherein the second electrode extends toward the second conductive layer and the second electrode and the second conductive layer are connected to each other.

19. The display device of claim 12, wherein the second electrode is spaced apart from the second conductive layer.

20. The display device of claim 1, wherein a constant voltage is provided to the conductive portion.