# US 10,770,674 B2 · OLED lighting apparatus

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- Number: US 10,770,674 B2
- Document ID: US10770674B2
- Status: Granted
- Kind: B2
- Application number: 16/197,301
- Filed: 2018-11-20
- Published: 2019-05-30
- Granted: 2020-09-08
- Earliest claimed: 2017-11-28
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Kyu-Hwang Lee; Taejoon Song; Chulho Kim; Hwankeon Lee
- Web page: https://patentgrep.com/patent/US10770674B2

## CPC

- H10K 50/814: combined with auxiliary electrodes, e.g. ITO layer combined with metal lines
- G09G 3/3225: using an active matrix
- H10K 50/844: Encapsulations
- H10K 50/88: Terminals, e.g. bond pads
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 71/80: using temporary substrates
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Disclosed herein is an OLED lighting apparatus which can achieve both improvement in reliability and reduction in manufacturing cost. In the OLED lighting apparatus, an encapsulation layer is disposed over the active area and the non-active area on a buffer layer, such that a pad disposed in the non-active area of the buffer layer can be stably secured by the encapsulation layer bonded thereto. Accordingly, upon tape automated bonding between an FPCB substrate with a COF tape attached thereto and a via electrode, the COF tape does not directly contact the pad but contacts the via electrode connected to the pad, particularly a connection terminal of the via electrode disposed on an upper surface of the encapsulation layer, thereby establishing electrical connection between the FPCB substrate and the via electrode. In this way, the connection terminal of the via electrode is electrically connected to the FPCB substrate via the COF tape, whereby a signal from the outside can be applied to the pad connected to the via electrode.

## Claims

### Claim 1

An OLED lighting apparatus having an active area and a non-active area, comprising:
a buffer layer;
an auxiliary wire disposed on the buffer layer;
an organic light emitting device including a first electrode disposed on the auxiliary wire and connected to the auxiliary wire and a second electrode stacked on the first electrode, and an organic light emitting layer between the first and second electrodes;
a pad connected to the first electrode and the second electrode and disposed in the non-active area; and
an encapsulation layer disposed over the buffer layer to cover the second electrode and the pad.

### Claim 2 (depends on 1)

The OLED lighting apparatus according to claim 1, further comprising a via electrode passing through the encapsulation layer in the non-active area and connected to the pad.

### Claim 3 (depends on 1)

The OLED lighting apparatus according to claim 1, wherein the pad is disposed on at least one side of the buffer layer.

### Claim 4 (depends on 1)

The OLED lighting apparatus according to claim 1, wherein the pad includes:
a pad electrode disposed at a same layer as the auxiliary wire and formed of a same material as the auxiliary wire; and
a pad electrode terminal disposed on the pad electrode and formed of a same material as the first electrode.

### Claim 5 (depends on 4)

The OLED lighting apparatus according to claim 4, wherein the pad electrode terminal is disposed on upper and side surfaces of the pad electrode and surrounds the upper and side surfaces of the pad electrode.

### Claim 6 (depends on 1)

The OLED lighting apparatus according to claim 1, wherein the encapsulation layer covers both the active area and the non-active area.

### Claim 7 (depends on 1)

The OLED lighting apparatus according to claim 1, wherein the via electrode includes:
a penetration portion passing through the encapsulation layer, the pad, and the buffer layer in the non-active area, and connected to the pad; and
a connection terminal disposed on an upper surface of the encapsulation layer in the non-active area, and connected to the penetration portion.

### Claim 8 (depends on 7)

The OLED lighting apparatus according to claim 7, wherein the via electrode is connected to a driving circuit through a connection terminal.

### Claim 9 (depends on 1)

The OLED lighting apparatus according to claim 1, further comprising a protective layer disposed between the first electrode and the organic light emitting layer and covering the auxiliary wire.

### Claim 10 (depends on 9)

The OLED lighting apparatus according to claim 9, further comprising a protective film disposed under the buffer layer and protecting the buffer layer.

### Claim 11 (depends on 9)

The OLED lighting apparatus according to claim 9, wherein the protective layer is covers the auxiliary wire and reduces a step coverage caused by the auxiliary wire.

### Claim 12 (depends on 9)

The OLED lighting apparatus according to claim 9, wherein the protective layer is covers the auxiliary wire and reduces a step coverage caused by the auxiliary wire.

### Claim 13 (depends on 1)

The OLED lighting apparatus according to claim 1, wherein the organic light emitting layer has a tandem structure.

### Claim 14

An OLED lighting apparatus having an active area and a non-active area, comprising:
a buffer layer;
an auxiliary wire disposed on the buffer layer;
an organic light emitting device including a first electrode disposed on the auxiliary wire and connected to the auxiliary wire, a second electrode stacked on the first electrode and an organic light emitting layer disposed between the first and second electrodes;
an encapsulation layer disposed over the buffer layer and having an opening;
a pad connected to the first and second electrodes and disposed in the non-active area and contacting a side of the buffer layer; and
a via electrode passing through the opening of the encapsulation layer in the non-active area and connected to the pad.

### Claim 15 (depends on 14)

The OLED lighting apparatus according to claim 14, wherein the via electrode includes:
a penetration portion passing through the encapsulation layer, the pad, and the buffer layer in the non-active area, and connected to the pad; and
a connection terminal disposed on an upper surface of the encapsulation layer in the non-active area, and connected to the penetration portion.

### Claim 16 (depends on 14)

The OLED lighting apparatus according to claim 14, further comprising a protective layer disposed between the first electrode and the organic light emitting layer.

### Claim 17 (depends on 16)

The OLED lighting apparatus according to claim 16, further comprising a protective film disposed under the buffer layer and protecting the buffer layer.