Organic light-emitting diode display

Patent metadata

Field	Value
Publication number	US-9899461-B2
Application number	US-201715679870-A
Country	US
Kind code	B2
Filing date	Aug 17, 2017
Priority date	Apr 29, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An organic light-emitting diode display is disclosed. The display includes a semiconductor layer formed over a substrate, a scan line formed over the semiconductor layer and configured to provide a scan signal, and a light emission control line formed over the semiconductor layer and configured to provide a light emission control signal. The display includes a data line configured to provide a data voltage and a driving voltage line configured to provide a driving voltage, wherein the driving voltage line crosses the scan line and is electrically insulated from the scan line. A switching transistor is electrically connected to the scan line and the data line and includes a switching drain electrode. A driving transistor includes a driving source electrode electrically connected to the switching drain electrode. Any one of the semiconductor layer and the light emission control line includes an extension at least partially overlapping the data line.

First claim

What is claimed is:

1. An organic light-emitting diode (OLED) display, comprising:
a substrate;
a semiconductor layer disposed on the substrate;
a scan line disposed on the semiconductor layer and configured to provide a scan signal;
a light emission control line disposed on the semiconductor layer and configured to provide a light emission control signal;
a data line configured to provide a data voltage;
a driving voltage line configured to provide a driving voltage, wherein the driving voltage line crosses the scan line and is electrically insulated from the scan line;
a switching transistor electrically connected to the scan line and the data line and including a switching drain electrode;
a driving transistor including a driving source electrode electrically connected to the switching drain electrode; and
an OLED electrically configured to receive a driving voltage,
wherein any one of the semiconductor layer and the light emission control line includes an extension at least partially overlapping two adjacent data lines in two adjacent pixels along the extending direction of the scan line.

2. The OLED display of claim 1 , wherein
the two adjacent data lines are disposed between two driving voltage lines in two adjacent pixels along the extending direction of the scan line.

3. The OLED display of claim 1 , wherein two adjacent semiconductor layers along the extending direction of the scan line are substantially symmetric about a y-axis in a plan view.

4. The OLED display of claim 1 , wherein
the extension is connected to the two adjacent driving voltage lines along the extending direction of the scan line, and
one of the two adjacent driving voltage lines is connected to the extension at a right side and the other is connected to the extension at a left side.

5. The OLED display of claim 1 , wherein
the semiconductor layer comprises the extension, and
the extension overlaps an intersection of the data line and the light emission control line.

6. The OLED display of claim 1 , wherein a width of the extension is greater than a sum of widths of the two data lines.

7. The OLED display of claim 1 , wherein the extension extends in a length direction of the data line.

8. The OLED display of claim 1 , wherein the semiconductor layer is electrically connected to the driving voltage line.

9. The OLED display of claim 1 , wherein the semiconductor layer includes a switching channel of the switching transistor and a driving channel of the driving transistor.

10. The OLED display of claim 9 , further comprising a first gate insulating layer disposed over the semiconductor layer.

11. The OLED display of claim 10 , further comprising:
a first storage electrode disposed over the first gate insulating layer and overlapping the driving channel in the depth dimension of the OLED display;
a second gate insulating layer disposed over the first storage electrode; and
a second storage electrode disposed over the second gate insulating layer and overlapping the first storage electrode in the depth dimension of the OLED display,
wherein the first storage electrode includes a driving gate electrode of the driving transistor.

12. The OLED display of claim 11 , further comprising an interlayer insulating layer disposed over the second storage electrode, wherein the data line is disposed over the interlayer insulating layer.

13. The OLED display of claim 1 , further comprising a compensation transistor configured to be turned on based on the scan signal to compensate a threshold voltage of the driving transistor, wherein the compensation transistor is electrically connected to a driving drain electrode of the driving transistor.

14. The OLED display of claim 1 , further comprising an operation control transistor configured to receive the light emission control signal and configured to be turned on to transfer the driving voltage to the driving transistor.

15. The OLED display of claim 14 , wherein the operation control transistor includes:
a portion of the light emission control line configured to function as an operation control gate electrode of the operation control transistor;
an operation control channel overlapping the operation control gate electrode in the depth dimension of the OLED display and disposed over the semiconductor layer; and
operation control source and drain electrodes disposed over the semiconductor layer and located on different sides of the operation control channel.

16. The OLED display of claim 12 , further comprising a passivation layer disposed over the data line, wherein the OLED includes:
a pixel electrode disposed over the passivation layer;
an organic emission layer disposed over the pixel electrode; and
a common electrode disposed over the organic emission layer.

17. The OLED display of claim 1 , wherein the extension does not overlap the scan line in the depth dimension of the OLED display.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Seung Kyu
• Hyun Chae Han
• Eom Ki Myeong

Classifications

• H10D30/674

  characterised by the active materials · CPC title

• H10D30/6757

  characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile (TFTs having channel structures for preventing kink or snapback effects H10D30/6708; TFTs having lightly-doped source or drain extensions H10D30/6715) · CPC title

• H01L29/78696

  Electricity · mapped topic

• H01L27/3262 Primary

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic