Organic light emitting display integrated with touch screen panel

• US 9,483,135 B2
• Filed: 06/18/2013
• Issued: 11/01/2016
• Est. Priority Date: 01/31/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Jeon, Mu-Kyung
• Primary Examiner(s): Sim, Matthew
• Application Number:
  US13/920,459
• Publication Number:
  US 20140210736A1
• Time in Patent Office: 1,232 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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

An organic light emitting display can be integrated with a touch screen panel, in which control lines arranged in the touch screen panel are used as driving electrodes of a mutual capacitive touch screen panel, and a signal applied to the control lines in a touch recognition operation is input in synchronization with the signal applied to a display panel without having influence on the display. The control lines used as driving electrodes of the touch screen panel can be electrically connected to auxiliary lines arranged close to sensing electrodes of the touch screen panel, thereby improving touch recognition sensitivity.

Claims

1. An organic light emitting display integrated with a touch screen panel comprising a plurality of first electrodes, said display comprising:

a first substrate on which a plurality of pixels, a plurality of signal lines and a plurality of control lines are arranged, wherein each of the plurality of signal lines and each of the plurality of control lines are coupled to a respective pixel of the plurality of pixels, wherein each pixel includes an organic light emitting diode;

a second substrate on the first substrate to seal the first substrate;

first electrodes arranged on a surface of the second substrate with the second substrate interposed between the first electrodes and the first substrate; and

a plurality of auxiliary lines, each of the plurality of auxiliary lines electrically coupled to a respective control line of the plurality of control lines, wherein a cathode electrode of the organic light emitting diode is provided between the plurality of auxiliary lines and the first electrodes, and the cathode electrode has an opening formed in a region overlapping with the auxiliary lines and with the control lines to expose the entirety of the respective auxiliary lines,

wherein each of the plurality of control lines and each of the plurality of auxiliary lines are arranged in a direction intersecting a respective first electrode so as to function as a second electrode of the touch screen panel, and

wherein each of the plurality of auxiliary lines directly contacts each of the plurality of control lines.

2. The organic light emitting display of claim 1, wherein each of the auxiliary lines are formed to have a width wider than that of each of the control lines electrically coupled thereto.

3. The organic light emitting display of claim 1, wherein the auxiliary lines are formed in the same layer as an anode electrode of an organic light emitting diode provided in each pixel.

4. The organic light emitting display of claim 3, wherein the auxiliary lines are made of the same material as the anode electrode.

5. The organic light emitting display of claim 1, wherein the auxiliary lines are configured to be separated from the anode electrode.

6. The organic light emitting display of claim 5, wherein the auxiliary lines is further provided with at least one protrusion protruded to a region between the anode electrodes.

7. The organic light emitting display of claim 1, wherein a plurality of adjacent control lines form one group, and each of the plurality of control lines constituting the group is operated as the second electrode of the touch screen panel.

8. The organic light emitting display of claim 7, wherein the control lines are coupled to the touch driving circuit through a second touch pad portion formed on a non-display area of the first substrate.

9. The organic light emitting display of claim 1, wherein the first electrode is a sensing electrode of the touch screen panel, and the second electrode is a driving electrode of the touch screen panel.

10. The organic light emitting display of claim 1, wherein the first electrodes are formed on a display area of the second substrate, corresponding to the region on which the pixels are formed.

11. The organic light emitting display of claim 10, wherein sensing lines through which the first electrodes are coupled to a touch driving circuit through a first touch pad portion are further formed on a non-display area positioned at the outside of the display area.

12. The organic light emitting display of claim 11, wherein the first touch pad portion formed on the second substrate is coupled to the same touch driving circuit as the second touch pad portion formed on the first substrate.

13. The organic light emitting display of claim 1, wherein the control lines comprise initialization driving control lines providing an initialization voltage to the respective pixels.

14. The organic light emitting display of claim 1, wherein each pixel includes:

an organic light emitting diode;

a first transistor configured to control the amount of current supplied to the organic light emitting diode, and having a gate electrode of which voltage is initialized by the initialization voltage; and

a second transistor coupled between the gate electrode of the first transistor and the control line providing the initialization voltage.

15. The organic light emitting display of claim 14, wherein the initialization voltage applied to the control line is lower than a data signal applied to each pixel.

16. The organic light emitting display of claim 15, wherein the initialization voltage is progressively applied for each group of control lines, operated as the second electrode of the touch screen panel.

17. The organic light emitting display of claim 16, wherein a high-level voltage is simultaneously applied to the other groups of control lines except the group of control lines to which the initialization voltage is applied.

18. An organic light emitting display integrated with a touch screen panel comprising a plurality of first electrodes, said display comprising:

a first substrate on which a plurality of pixels, a plurality of signal lines and a plurality of control lines are arranged, wherein each of the plurality of signal lines and each of the plurality of control lines are coupled to a respective pixel of the plurality of pixels wherein each pixel includes;

an organic light emitting diode;

a first transistor configured to control the amount of current supplied to the organic light emitting diode, and having a gate electrode of which voltage is initialized by the initialization voltage, wherein the initialization voltage applied to the control line is lower than a data signal applied to each pixel, wherein the initialization voltage is progressively applied for each group of control lines and wherein a high-level voltage is simultaneously applied to the other groups of control lines except the group of control lines to which the initialization voltage is applied; and

a second transistor coupled between the gate electrode of the first transistor and the control line providing the initialization voltage;

a second substrate on the first substrate to seal the first substrate;

first electrodes arranged on a surface of the second substrate with the second substrate interposed between the first electrodes and the first substrate; and

a plurality of auxiliary lines, each of the plurality of auxiliary lines electrically coupled to a respective control line of the plurality of control lines,

wherein each of the plurality of control lines and each of the plurality of auxiliary lines are arranged in a direction intersecting a respective first electrode so as to function as a second electrode of the touch screen panel.