Display device having touch sensor and manufacturing method thereof

• US 9,489,092 B2
• Filed: 01/16/2014
• Issued: 11/08/2016
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Ki-Hoon, Park, Hee-Sang
• Primary Examiner(s): Spar, Ilana
• Assistant Examiner(s): Rayan, Mihir K
• Application Number:
  US14/157,058
• Publication Number:
  US 20150002756A1
• Time in Patent Office: 1,027 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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

Abstract

A display device having a touch sensor and a manufacturing method thereof. The display device includes a pixel defining layer, first electrodes, an emissive layer, second electrodes, and an insulating layer. The first electrodes are exposed and arranged through the pixel defining layer. The emissive layer is formed on each first electrode. Each second electrode is connected to the emissive layer, and the second electrodes are arranged to be spaced apart from each other. The insulating pattern is formed on the pixel defining layer exposed between adjacent second electrodes.

Claims

1. A display device having a touch sensor, comprising:

first electrodes;

a pixel defining layer disposed on the first electrodes, the pixel defining layer comprising openings exposing the first electrodes;

an emissive layer disposed on each first electrode;

second electrodes connected to the emissive layer, the second electrodes being spaced apart from each other;

an insulating pattern disposed directly on the pixel defining layer between adjacent second electrodes; and

sensing electrodes spaced apart from the second electrodes and configured to be driven, together with the second electrodes, as a capacitive touch sensor.

2. The display device of claim 1, wherein the sensing electrodes and the second electrodes intersect each other.

3. The display device of claim 1, wherein each of the second electrodes is connected to groups of the emissive layers arranged in at least one row.

4. The display device of claim 1, further comprising:

an electrode driving unit configured to progressively provide a touch driving signal to the second electrodes during a first period; and

a voltage supply unit configured to supply a supply voltage during a second period.

5. The display device of claim 4, wherein the first and second periods are alternately repeated.

6. The display device of claim 1, wherein the sensing electrode overlaps the pixel defining layer.

7. The display device of claim 1, wherein the insulating pattern is spaced apart from the second electrode.

8. The display device of claim 1, wherein the insulating pattern comprises silicon oxide or silicon nitride.

9. The display device of claim 1, wherein the insulating pattern comprises a first insulating pattern and a second insulating pattern disposed on the first insulating pattern.

10. The display device of claim 9, wherein etching rates of the first and second insulating patterns are different from each other.

11. The display device of claim 9, wherein the second insulating pattern has a width greater than that of the first insulating pattern.

12. The display device of claim 9, wherein the first insulating pattern has an etching rate higher than that of the second insulating pattern.

13. The display device of claim 9, wherein:

the first insulating pattern comprises one of silicon oxide and silicon nitride; and

the second insulating pattern comprises the other of silicon oxide and silicon nitride.