# US 2015/0102306 A1 · Electroluminescent (el) device and display device

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- Number: US 2015/0102306 A1
- Document ID: US20150102306A1
- Status: Published application
- Kind: A1
- Application number: 14/365,846
- Filed: 2013-11-15
- Published: 2015-04-16
- Earliest claimed: 2013-08-30
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Shiming Shi; Kazuyoshi Nagayama
- Web page: https://patentgrep.com/patent/US20150102306A1

## CPC

- H10K 59/121: characterised by the geometry or disposition of pixel elements
- H10K 59/123: Connection of the pixel electrodes to the thin film transistors [TFT]
- H10K 59/80518: {Reflective anodes, e.g. ITO combined with thick metallic layers}
- H10K 59/878: {comprising reflective means}
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/80524: {Transparent cathodes, e.g. comprising thin metal layers}
- H10K 59/873: {Encapsulations}
- H10K 2102/3031: {Two-side emission, e.g. transparent OLEDs [TOLED]}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An electroluminescent (EL) device and a display device are disclosed. The OLED device comprises a base substrate; a plurality of pixel units arranged in an array are disposed on the base substrate; each pixel unit comprises sub-pixel units provided with EL structures; the EL structures each comprise a transparent anode, an emission layer (EML) and a transparent cathode disposed on the base substrate in sequence; the EL structure of each sub-pixel unit is divided into a transmissive area and a reflective area; and the reflective area of the EL structure is provided with a reflective layer. The EL device can achieve transparent display with the transmissive area of each sub-pixel unit, and meanwhile, the transmissive area for achieving transparent display can also realize normal display.

## Claims

### Claim 1

An electroluminescent (EL) device, comprising a base substrate, wherein
a plurality of pixel units arranged in an array are disposed on the base substrate; each pixel unit comprises sub-pixel units provided with EL structures;
the EL structure each comprises a transparent anode, an emission layer (EML) and a transparent cathode disposed on the base substrate in sequence;
the EL structure of each sub-pixel unit is divided into a transmissive area and a reflective area; and the reflective area of the EL structure is provided with a reflective layer.

### Claim 2 (depends on 1)

The EL device according to claim 1, wherein the reflective layer is disposed between the transparent anode and the EML; or
the reflective layer is disposed on one side of the transparent anode away from the EML.

### Claim 3 (depends on 1)

The EL device according to claim 1, wherein each pixel unit comprises three sub-pixel units, and EMLs of the three sub-pixel units emit red light, green light and blue light respectively.

### Claim 4 (depends on 1)

The EL device according to claim 1, wherein light emitted by the EMLs of the plurality of sub-pixel units in each pixel unit is white; and one surface of the EML away from the reflective layer is provided with a color filter, which is opposite to the reflective area and is assembled with the base substrate to form a cell.

### Claim 5 (depends on 1)

The EL device according to claim 1, wherein the reflective layer is disposed on one side of the transparent cathode away from the EML.

### Claim 6 (depends on 5)

The EL device according to claim 5, wherein each pixel unit comprises three sub-pixel units, and EMLS of the three sub-pixel units emit red light, green light and blue light respectively.

### Claim 7 (depends on 5)

The EL device according to claim 5, wherein light emitted by the EMLs of the plurality of sub-pixel units in each pixel unit is white; and one surface of the EML away from the reflective layer is provided with a color filter layer opposite to the reflective area and formed on the base substrate.

### Claim 8 (depends on 1)

The EL device according to claim 1, further comprising an EML encapsulating structure.

### Claim 9 (depends on 1)

The EL device according to claim 1, wherein a thin-film transistor (TFT) is further provided on the base substrate; and the transparent anode is electrically connected with a source electrode of the TFT.

### Claim 10 (depends on 9)

The EL device according to claim 9, wherein the TFT is an amorphous silicon (a-Si) TFT, a low-temperate polycrystalline silicon (LTPS) TFT, an oxide semiconductor TFT or an organic TFT.

### Claim 11 (depends on 1)

A display device, comprising the EL device according to claim 1.

### Claim 12 (depends on 2)

The EL device according to claim 2, wherein each pixel unit comprises three sub-pixel units, and EMLs of the three sub-pixel units emit red light, green light and blue light respectively.

### Claim 13 (depends on 2)

The EL device according to claim 2, wherein light emitted by the EMLs of the plurality of sub-pixel units in each pixel unit is white; and one surface of the EML away from the reflective layer is provided with a color filter, which is opposite to the reflective area and is assembled with the base substrate to form a cell.

### Claim 14 (depends on 2)

The EL device according to claim 2, further comprising an EML encapsulating structure.

### Claim 15 (depends on 2)

The EL device according to claim 2, wherein a thin-film transistor (TFT) is further provided on the base substrate; and the transparent anode is electrically connected with a source electrode of the TFT.

### Claim 16 (depends on 5)

The EL device according to claim 5, further comprising an EML encapsulating structure.

### Claim 17 (depends on 5)

The EL device according to claim 5, wherein a thin-film transistor (TFT) is further provided on the base substrate; and the transparent anode is electrically connected with a source electrode of the TFT.