US Patent Application 18347995. LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME simplified abstract

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LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME

Organization Name

Samsung Display Co., Ltd.


Inventor(s)

BORA Lee of Hwaseong-si (KR)

HYOMIN Ko of Suwon-si (KR)

ILLHUN Cho of Seoul (KR)

EUNJAE Jeong of Hwaseong-si (KR)

MINJI Kim of Hwaseong-si (KR)

SOHEE Jo of Cheonan-si (KR)

DONGJUN Kim of Suwon-si (KR)

HANKYU Pak of Suwon-si (KR)

SANGHYUN Han of Hwaseong-si (KR)

LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME - A simplified explanation of the abstract

This abstract first appeared for US patent application 18347995 titled 'LIGHT EMITTING DIODE AND DISPLAY DEVICE INCLUDING THE SAME

Simplified Explanation

The abstract describes a light emitting diode (LED) with improved light extraction efficiency and emission efficiency properties.

  • The LED includes a first electrode, a hole transport region, an emission layer, an electron transport region, and a second electrode.
  • The hole transport region consists of three layers: a first hole transport layer, a second hole transport layer, and a third hole transport layer.
  • The first hole transport layer is adjacent to the first electrode and has a first refractive index.
  • The second hole transport layer is adjacent to the emission layer and has a second refractive index.
  • The third hole transport layer is located between the first and second hole transport layers and has a third refractive index, which is greater than both the first and second refractive indices.
  • This configuration results in high light extraction efficiency and high emission efficiency for the LED.


Original Abstract Submitted

A light emitting diode of an embodiment includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer disposed adjacent to the first electrode and having a first refractive index, a second hole transport layer disposed adjacent to the emission layer and having a second refractive index, and a third hole transport layer disposed between the first hole transport layer and the second hole transport layer and having a third refractive index which is greater than each of the first refractive index and the second refractive index, thereby showing high light extraction efficiency and high emission efficiency properties.

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