DISPLAY DEVICE

• US 20180102398A1
• Filed: 10/02/2017
• Published: 04/12/2018
• Est. Priority Date: 10/06/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: JEONG, CHEOL YUN, Kwak, Hee June, Youn, Ju Ae
• Granted Patent: US 10,325,971 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 28/88 made by patterning layers, e.g. by etching conductive layers
• CPC Class Codes: H01L 28/90 having vertical extensions
• CPC Class Codes: H01L 29/78696 characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel H01L29/78612 takes precedence; transistors having a drain offset region or a lightly doped drain [LDD] H01L29/78621
• CPC Class Codes: H01L 33/40 Materials therefor
• CPC Class Codes: H01L 33/42 Transparent materials
• CPC Class Codes: H10K 50/814 combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/1216 the pixel elements being capacitors
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

A display device includes a substrate, a semiconductor layer on the substrate, a gate insulating layer on the semiconductor layer and having one or more first openings, a gate electrode on the gate insulating layer, a first capacitor electrode on the gate insulating layer, a first interlayer insulating layer on the first capacitor electrode and having one or more second openings, a second capacitor electrode on the first interlayer insulating layer, a source electrode and a drain electrode connected with the semiconductor layer, and a light emitting diode connected with the drain electrode. The first capacitor electrode includes one or more protrusions in the first openings of the gate insulating layer and correspond to a shape of the first openings, and the second capacitor electrode includes one or more protrusions in the second openings of the first interlayer insulating layer and correspond to a shape of the second openings.

Claims

1. A display device, comprising:

a substrate;

a semiconductor layer provided on the substrate;

a gate insulating layer provided on the semiconductor layer and having one or more first projected portions;

a gate electrode provided on the gate insulating layer;

a first capacitor electrode provided on the gate insulating layer and provided on the same layer as the layer of the gate electrode;

a first interlayer insulating layer provided on the gate electrode and the first capacitor electrode, and having one or more second projected portions;

a second capacitor electrode provided on the first interlayer insulating layer;

a source electrode and a drain electrode provided on the substrate, and electrically connected with the semiconductor layer; and

a light emitting diode connected with the drain electrode,

wherein the first capacitor electrode is curved so as to correspond to a shape of the first projected portions, and the second capacitor electrode is curved so as to correspond to a shape of the second projected portions.

2. The display device of claim 1, further comprising,

a second interlayer insulating layer provided on the second capacitor electrode and having one or more third projected portions;

and

a third capacitor electrode provided on the second interlayer insulating layer, and provided on the same layer as the layers of the source electrode and the drain electrode.

3. The display device of claim 2, wherein an area of the third capacitor electrode is larger than an area of the second capacitor electrode.

4. The display device of claim 1, wherein the first projected portions and the second projected portions overlap each other, from a plan view.

5. The display device of claim 1, wherein the second capacitor electrode covers the first capacitor electrode, from a plan view.

6. The display device of claim 1, wherein an area of the second capacitor electrode is larger than an area of the first capacitor electrode.

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

a plurality of data lines connected with the source electrode, and parallel to one another,

wherein the second capacitor electrode is extended such that the second capacitor electrode crosses the plurality of data lines.

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

a power line provided on the same layer as the layers of the source electrode and the drain electrode, and connected with the second capacitor electrode to apply a fixed voltage to the second capacitor electrode.

9. The display device of claim 1, wherein the first projected portions extend in a first direction or a second direction, the second direction being substantially perpendicular to the first direction.

10. A display device, comprising:

a substrate;

a semiconductor layer provided on the substrate;

a gate electrode provided on the semiconductor layer;

a first interlayer insulating layer provided on the gate electrode and having one or more of second projected portions;

a second capacitor electrode provided on the first interlayer insulating layer;

a second interlayer insulating layer provided on the second capacitor electrode and having one or more of third projected portions;

a source electrode and a drain electrode provided on the substrate, and electrically connected with the semiconductor layer;

a third capacitor electrode provided on the second interlayer insulating layer; and

a light emitting diode connected with the drain electrode,

wherein the second capacitor electrode is curved so as to correspond to a shape of the second projected portions, and the third capacitor electrode is curved so as to correspond to a shape of the third projected portions.

11. The display device of claim 10, further comprising:

a gate insulating layer provided on the semiconductor layer and having one or more of first projected portions; and

a first capacitor electrode provided on the gate insulating layer, and provided on the same layer as the layer of the gate electrode.

12. The display device of claim 10, wherein the third capacitor electrode covers the second capacitor electrode, from a plan view.

13. The display device of claim 10, wherein the second projected portions and the third projected portions overlap, from a plan view.

14. The display device of claim 10, wherein an area of the third capacitor electrode is larger than an area of the second capacitor electrode.

15. The display device of claim 11, wherein an area of the second capacitor electrode is larger than an area of the first capacitor electrode.

16. The display device of claim 10, further comprising:

a plurality of data lines connected with the source electrode, and parallel to one another,

wherein the third capacitor electrode is extended so as to cross the plurality of data lines.

17. The display device of claim 10, further comprising:

a power line provided on the same layer as the layers of the source electrode and the drain electrode, and integrally formed with the third capacitor electrode.

18. The display device of claim 17, wherein the power line and the third capacitor electrode cross each other and form a lattice.

19. The display device of claim 10, wherein the second projected portions and the third projected portions have forms extend in a first direction or a second direction, the second direction being substantially perpendicular to the first direction.

20. The display device of claim 10, wherein the second capacitor electrode is separated from other elements within the display device.