Organic light emitting diode display

Patent metadata

Field	Value
Publication number	US-10074710-B2
Application number	US-201715490661-A
Country	US
Kind code	B2
Filing date	Apr 18, 2017
Priority date	Sep 2, 2016
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, and a plurality of transmitting windows configured to transmit light therethrough. The plurality of transmitting windows is spaced apart from the plurality of pixels. Each of the plurality of pixels includes a transistor and a capacitor. The transistor includes a light-blocking electrode disposed on the substrate and a plurality of electrode members disposed at different layers on the light-blocking electrode. The capacitor includes a first capacitor electrode disposed on a same layer as the light-blocking electrode, and a second capacitor electrode disposed on a same layer as a first one of the plurality of electrode members to overlap the first capacitor electrode.

First claim

What is claimed is:

1. An organic light emitting diode display comprising:
a substrate;
a plurality of pixels disposed on the substrate; and
a plurality of transmitting windows configured to transmit light therethrough,
wherein the plurality of transmitting windows is spaced apart from the plurality of pixels, and
wherein each of the plurality of pixels includes:
a transistor including a light-blocking electrode disposed on the substrate and a plurality of electrode members disposed at different layers on the light-blocking electrode; and
a capacitor including a first capacitor electrode disposed on a same layer as the light-blocking electrode, and a second capacitor electrode disposed on a same layer as a first one of the plurality of electrode members to overlap the first capacitor electrode,
wherein each the plurality of electrode members includes a semiconductor member disposed to overlap the light-blocking electrode,
the light-blocking electrode is disposed between the semiconductor member and the substrate, and
the light-blocking electrode completely covers the semiconductor member.

2. The organic light emitting diode display of claim 1 , wherein each of the plurality of electrode members further includes:
a gate electrode disposed on the semiconductor member; and
a source electrode and a drain electrode disposed to face each other on opposite sides of the gate electrode and connected to the semiconductor member.

3. The organic light emitting diode display of claim 2 , wherein the second capacitor electrode is disposed at a same layer as the gate electrode.

4. The organic light emitting diode display of claim 2 , wherein the second capacitor electrode is disposed at a same layer as the semiconductor member.

5. The organic light emitting diode display of claim 4 , wherein the capacitor further includes a fourth capacitor electrode disposed at a same layer as a second one of the plurality of electrode members, the fourth capacitor electrode overlapping the second capacitor electrode.

6. The organic light emitting diode display of claim 5 , wherein the fourth capacitor electrode is disposed at a same layer as the source electrode.

7. The organic light emitting diode display of claim 5 , wherein an overlapped area between the first capacitor electrode and the second capacitor electrode is smaller than an overlapped area between the second capacitor electrode and the fourth capacitor electrode.

8. The organic light emitting diode display of claim 2 , further comprising
a power supply line connected to the first capacitor electrode,
wherein the second capacitor electrode is connected to the gate electrode.

9. The organic light emitting diode display of claim 8 , wherein each of the plurality of pixels further includes a plurality of insulating layers disposed at different layers on the substrate and insulating the light-blocking electrode from each of the plurality of electrode members, and
wherein the power supply line is disposed at a same layer as the source electrode.

10. The organic light emitting diode display of claim 9 , wherein the power supply line directly contacts the first capacitor electrode through the plurality of insulating layers.

11. The organic light emitting diode display of claim 9 , wherein the power supply line contacts the first capacitor electrode through the insulating layers, and
wherein the power supply line and the first capacitor electrode are connected to each other by a connector disposed at a same layer as the gate electrode.

12. The organic light emitting diode display of claim 3 , wherein the capacitor further includes a third capacitor electrode disposed at a same layer as one of the electrode members, the third capacitor electrode overlapping the second capacitor electrode.

13. The organic light emitting diode display of claim 12 , wherein the third capacitor electrode is disposed at a same layer as the source electrode.

14. The organic light emitting diode display of claim 12 , wherein an overlapped area between the first capacitor electrode and the second capacitor electrode is smaller than an overlapped area between the second capacitor electrode and the third capacitor electrode.

15. The organic light emitting diode display of claim 1 , wherein each of the plurality of pixels further includes a plurality of insulating layers disposed at different layers on the substrate, the plurality of insulating layers insulating the light-blocking electrode from each of the plurality of electrode members, and
an insulating layer, of the plurality of insulating layers, contacting the light-blocking electrode, has a thickness that is less than that of another insulating layer of the plurality of insulating layers.

16. The organic light emitting diode display of claim 1 , wherein each of the plurality of pixels further includes a buffer layer disposed between the substrate and the light-blocking electrode.

17. The organic light emitting diode display of claim 1 , wherein each of the pixels of the plurality of pixels further includes a plurality of insulating layers disposed at different layers on the substrate, the plurality of insulating layers insulating the light-blocking electrode from each of the electrode members, and
wherein the transmitting windows include at least one of an opening and a groove formed to overlap at least one of the insulating layers.

18. The organic light emitting diode display of claim 1 , further comprising:
a scan line disposed on the substrate and configured to transfer a scan signal;
a data line, crossing the scan line, transferring a data voltage; and
a driving voltage line, crossing the scan line, transferring a driving voltage,
wherein the transistor further includes:
a switching transistor connected to the scan line and the data line; and
a driving transistor connected to the switching transistor and including a driving gate electrode, a driving source electrode, and a driving drain electrode,
wherein the driving gate electrode is connected to the second capacitor electrode, and the driving voltage line is connected to the first capacitor electrode.

19. The organic light emitting diode display of claim 18 , wherein the transistor further includes a compensation transistor that is turned on by the scan signal to compensate a threshold voltage of the driving transistor,
wherein the compensation transistor is disposed on a moving path between the driving drain electrode and the driving gate electrode, and
wherein the second capacitor electrode is connected to the compensation transistor.

20. The organic light emitting diode display of claim 18 , further comprising:
a previous scan line extended in parallel with the scan line and transferring a previous scan signal; and
an initialization voltage line configured to transfer an initialization voltage for initializing the driving transistor,
wherein the transistor further includes an initialization transistor that is turned on according to the previous scan signal to transfer the initialization voltage to the driving gate electrode, and
wherein the second capacitor electrode is connected to the initialization transistor.

21. A display device, comprising:
a substrate having a pixel area on which a plurality of pixels is disposed and a light transmitting area on which light is permitted to pass therethrough;
a plurality of windows disposed within the light transmitting area of the substrate; and
a thin film transistor disposed within each of the p

Assignees

• Samsung Display Co Ltd

Inventors

• Ebisuno Kohei
• Shin Ae
• Yang Yong Ho
• Lee Jun Hee
• Choi Nak Cho

Classifications

• H01L27/3272 Primary

  Electricity · mapped topic

• H01L27/3265

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L27/3216

  Electricity · mapped topic