Efficient OLED Display Design with Extended Lifespan
Here’s PatSnap Eureka !
Summary
Problems
Current organic light-emitting diode (OLED) display devices using the RGB Side by Side (RGB-SBS) structure face inefficiencies and shorter lifespan compared to tandem structures, which are complex and costly to produce.
Innovation solutions
Incorporating a second light-emitting layer and a charge generating layer in the OLED display device, with the second light-emitting layer emitting the same color as the first light-emitting part and a charge generating layer disposed between them, improves light-emitting efficiency and lifespan, and simplifies manufacturing by omitting a fine mask process.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a tandem structure is used to improve efficiency and lifespan, then light-emitting efficiency and device lifespan are improved, but manufacturing complexity and production cost increase due to requiring double evaporation chambers
Why choose this principle:
The patent merges the functions of multiple light-emitting layers into a single evaporation chamber by using a charge generating layer that enables energy transfer between layers. Instead of requiring separate evaporation chambers for each light-emitting layer (as in tandem structures), the invention combines them into one chamber while maintaining the benefits of multiple emitting layers through optical and electrical coupling mechanisms.
Principle concept:
If a tandem structure is used to improve efficiency and lifespan, then light-emitting efficiency and device lifespan are improved, but manufacturing complexity and production cost increase due to requiring double evaporation chambers
Why choose this principle:
The charge generating layer acts as an intermediary between the first and second light-emitting layers, enabling charge transfer and energy transfer without requiring separate manufacturing chambers. This mediator layer facilitates the interaction between layers, allowing them to work together as an integrated system deposited in a single evaporation chamber.
Application Domain
Data Source
AI summary:
Incorporating a second light-emitting layer and a charge generating layer in the OLED display device, with the second light-emitting layer emitting the same color as the first light-emitting part and a charge generating layer disposed between them, improves light-emitting efficiency and lifespan, and simplifies manufacturing by omitting a fine mask process.
Abstract
An organic light-emitting diode display device is provided, including an anode layer, a cathode layer, a first light-emitting layer, and a second light-emitting layer disposed between the anode layer and the cathode layer, wherein the first light-emitting layer comprises a first light-emitting part, a second light-emitting part, and a third light-emitting part arranged side-by-side, the second light-emitting layer is configured to emit light of a same color as light emitted from the first light-emitting part, and the organic light-emitting diode display device further includes a charge generating layer disposed between the second light-emitting layer and the first light-emitting part.