Organic light-emitting diode display comprising auxiliary electrodes

• US 7,710,019 B2
• Filed: 11/07/2006
• Issued: 05/04/2010
• Est. Priority Date: 12/11/2002
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam-Deog, Choi, Beohm-Rock, Jung, Kwang-Chul
• Primary Examiner(s): Roy; Sikha
• Assistant Examiner(s): DIAZ, JOSE
• Application Number:
  US11/557,244
• Publication Number:
  US 20070063936A1
• Time in Patent Office: 1,274 Days
• Field of Search: 313498-512, 315/169.1, 315/169.3, 428690-691, 428/917, 428/66, 428532-535, 428/539, 438 26- 29, 438/34, 438/82, 257/40, 257/72, 257 98-100, 257642-643, 257/759
• US Class Current: 313/504
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/043 Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 2320/0223 Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

An organic light-emitting diode (OLED) display includes a substrate, an auxiliary electrode disposed on the substrate, a first signal line disposed on the substrate, a second signal line crossing the first signal line, a driving voltage line disposed on the substrate, a first thin film transistor connected to the first signal line and the second signal line, a second thin film transistor connected to the first thin film transistor and the driving voltage line, a first electrode connected to the second thin film transistor, a second electrode facing the first electrode, and a light-emitting member disposed between the first electrode and the second electrode. The auxiliary electrode is connected to one of the driving voltage line and the second electrode.

Claims

1. An organic light-emitting diode (OLED) display, comprising:

a substrate;

a first auxiliary electrode disposed on the substrate;

a first signal line disposed on the substrate;

a second signal line crossing the first signal line;

a driving voltage line connected to the first auxiliary electrode;

a first thin film transistor connected to the first signal line and the second signal line;

a second thin film transistor connected to the first thin film transistor and the driving voltage line;

a first electrode connected to the second thin film transistor;

a second electrode facing the first electrode; and

a light-emitting member disposed between the first electrode and the second electrode,

wherein the first auxiliary electrode does not overlap the first signal line.

2. The OLED display of claim 1, wherein the first auxiliary electrode is disposed on a layer different from the driving voltage line.

3. The OLED display of claim 1, further comprising a blocking layer disposed on the first auxiliary electrode.

4. The OLED display of claim 1, wherein the first auxiliary electrode covers the entire surface of the substrate.

5. The OLED display of claim 1, wherein the first auxiliary electrode comprises a transparent or translucent conductor.

6. The OLED display of claim 1, wherein the first auxiliary electrode is disposed corresponding to the light-emitting member.

7. The OLED display of claim 6, wherein the first auxiliary electrode comprises at least one of Al, an Al alloy, Cu, a Cu alloy, Ag, and an Ag alloy.

8. An organic light-emitting diode (OLED) display, comprising:

a substrate;

a first auxiliary electrode disposed on the substrate;

a first signal line disposed on the substrate;

a second signal line crossing the first signal line;

a driving voltage line connected to the first auxiliary electrode;

a first thin film transistor connected to the first signal line and the second signal line;

a second thin film transistor connected to the first thin film transistor and the driving voltage line;

a first electrode connected to the second thin film transistor;

a second electrode facing the first electrode;

a light-emitting member disposed between the first electrode and the second electrode; and

a second auxiliary electrode spaced apart from the first auxiliary electrode,

wherein the second auxiliary electrode is connected to the second electrode.

9. The OLED display of claim 8, wherein the first auxiliary electrode and the second auxiliary electrode are disposed on the same layer.

10. The OLED display of claim 8, wherein the second auxiliary electrode receives a voltage having the same magnitude as what the second electrode receives.

11. The OLED display of claim 8, further comprising a voltage auxiliary line disposed on the same layer as the first signal line or the second signal line, the voltage auxiliary line being connected to the second electrode and the second auxiliary electrode.

12. The OLED display of claim 8, wherein the second electrode comprises a transparent or translucent conductor.

13. The OLED display of claim 12, wherein the second electrode comprises indium tin oxide or indium zinc oxide.

14. The OLED display of claim 8, further comprising a partition, the light-emitting member being disposed in an opening of the partition.

15. An organic light-emitting diode (OLED) display, comprising:

a substrate;

an auxiliary electrode disposed on the substrate;

a first signal line disposed on the substrate;

a second signal line crossing the first signal line;

a first thin film transistor connected to the first signal line and the second signal line;

a second thin film transistor connected to the first thin film transistor;

a first electrode connected to the second thin film transistor;

a second electrode facing the first electrode and

a light-emitting member disposed between the first electrode and the second electrode,

wherein the second electrode is connected to the auxiliary electrode through a connecting member.

16. The OLED display of claim 15, further comprising a voltage auxiliary line disposed on the same layer as the first signal line or the second signal line, the voltage auxiliary line being connected to the second electrode.

17. The OLED display of claim 15, wherein the second electrode comprises a transparent or translucent conductor.

18. The OLED display of claim 17, wherein the second electrode comprises indium tin oxide or indium zinc oxide.