IP Library Granted Patent US 11,031,442
Granted Patent B2
US 11,031,442 · App. 16/218,419 · Granted Jun 8, 2021

Organic light emitting display device

Inventors: Jaesung Lee (Paju-si, KR); Jonghyeok Im (Paju-si, KR)
Assignee: LG DISPLAY CO., LTD.
H01L27/3232G09G3/3291H01L27/3246H01L27/3276H01L51/5012H01L51/5228G09G3/3233G09G2310/08H01L51/5212
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Quick Facts
Patent No.
US 11,031,442
App. No.
16/218,419
Granted
Jun 8, 2021
Kind
B2
Abstract

The present disclosure includes: a display panel separated into a light emitting unit, in which an organic light emitting diode is disposed, and a light transmitting unit which selectively transmits light; and a driving circuit configured to drive the display panel. The display panel includes a first substrate, a second substrate, and a liquid crystal layer. In the first substrate, the organic light emitting diode is disposed in the light emitting unit, and a first electrode is disposed in the light transmitting unit. The second substrate faces the first substrate, and a second electrode is disposed in the light transmitting unit. The liquid crystal layer is interposed between the first electrode and the second electrode, and adjusts a transmittance due to a difference between a voltage applied to the first electrode and a voltage applied to the second electrode.

Claims (43)

1. An organic light emitting display device comprising:

a display panel divided into a light emitting unit, in which an organic light emitting diode is disposed, and a light transmitting unit which selectively transmits light; and

a driving circuit configured to drive the display panel,

wherein the display panel comprises:

a first substrate where the organic light emitting diode is disposed in the light emitting unit and a first electrode is disposed in the light transmitting unit;

a second substrate facing the first substrate and where a second electrode is disposed in the light transmitting unit;

a liquid crystal layer interposed between the first electrode and the second electrode, and

adjusting a transmittance of the liquid crystal layer according to a difference between a voltage applied to the first electrode and a voltage applied to the second electrode;

a low-potential voltage line disposed on the first substrate;

at least one insulating layer disposed on the low-potential voltage line; and

an auxiliary electrode disposed on the at least one insulating layer contacting the low-potential voltage line through an auxiliary connector passing through the at least one insulating layer,

wherein the auxiliary electrode is in contact with the first electrode and a cathode of the organic light emitting diode.

2. The organic light emitting display device of claim 1 , further comprising a bank layer disposed on the first substrate and defining the light emitting unit.

3. The organic light emitting display device of claim 2 , wherein the first electrode covers the bank layer and connected to a low-potential voltage line.

4. The organic light emitting display device of claim 1 , wherein the first electrode is integrally formed with the auxiliary electrode.

5. The organic light emitting display device of claim 1 , wherein the first electrode is formed of a same material as an anode of the organic light emitting diode.

6. The organic light emitting display device of claim 1 , wherein the first electrode is formed of a same material as a cathode of the organic light emitting diode.

7. The organic light emitting display device of claim 1 , wherein the first electrode is electrically connected to the cathode.

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

a pad disposed on the first substrate and supplied with a second voltage applied from the driving circuit to the second electrode and electrically connected to the second electrode;

at least one insulating layer covering the pad; and

an auxiliary connector passing through the at least one insulating layer.

9. The organic light emitting display device of claim 1 , wherein the first and second electrodes are formed of a transparent metal material.

10. An organic light emitting display device including a display panel having first and second substrates facing each other where a light emitting unit and a light transmitting unit are defined, comprising:

an organic light emitting diode disposed on the first substrate and located at the light emitting unit;

a driving circuit configured to drive the display panel;

a first electrode disposed at the light emitting unit and the light transmitting unit, and a second electrode disposed at the light emitting unit and the light transmitting unit;

a bank layer disposed on the first substrate and defining the light emitting unit and the light transmitting unit;

a transmittance tuner interposed between the first and second electrodes and adjusting a transmittance of the light transmitting unit in accordance with according to a voltage difference applied to the first and second electrodes;

a low-potential voltage line disposed on the first substrate;

at least one insulating layer disposed on the low-potential voltage line; and

an auxiliary electrode disposed on the at least one insulating layer contacting the low-potential voltage line through an auxiliary connector passing through the at least one insulating layer,

wherein the auxiliary electrode is in contact with the first electrode and a cathode of the organic light emitting diode.

11. The organic light emitting display device of claim 10 , wherein the transmittance tuner includes a liquid crystal layer.

12. The organic light emitting display device of claim 10 , wherein the first electrode covers the bank layer and connected to the low-potential voltage line.

13. The organic light emitting display device of claim 10 , wherein the first electrode is integrally formed with the auxiliary electrode.

14. The organic light emitting display device of claim 10 , wherein the first electrode is formed of a same material as an anode of the organic light emitting diode.

15. The organic light emitting display device of claim 10 , wherein the first electrode is formed of a same material as a cathode of the organic light emitting diode.

16. The organic light emitting display device of claim 10 , wherein the first electrode is electrically connected to the cathode.

17. The organic light emitting display device of claim 10 , further comprising: a pad disposed on the first substrate and supplied with a second voltage applied from the driving circuit to the second electrode and electrically connected to the second electrode;

at least one insulating layer covering the pad; and

an auxiliary connector passing through the at least one insulating layer.

18. The organic light emitting display device of claim 10 , wherein the first and second electrodes are formed of a transparent metal material.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 12, 2018
From: LEE, JAESUNG; IM, JONGHYEOK
To: LG DISPLAY CO., LTD.
Reel/Frame 047760/0226 →
Priority Claims (1)
KR 10-2017-0174426 · Dec 18, 2017 · national
Continuity (1)
Related Publication 20190189708A1 · Jun 20, 2019