Double-Sided OLED Substrate Shared Gate Electrode Thickness Reduction

Solution Overview

Problem

Existing double-sided display OLED array substrates have a large thickness due to independent base substrates and thin film transistors, leading to high production costs.

Innovation Solution

A double-sided display OLED array substrate design where two thin film transistors share an identical gate electrode, reducing the number of required base substrates and thickness, with a manufacturing method involving sequential formation of OLEDs and TFTs on each substrate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If two independent TFTs with separate gate electrodes are used to drive OLEDs on both sides, then each OLED can be independently driven, but the substrate thickness increases and production cost increases

Engineering Contradiction:

Improveindependent driving capabilityVSAvoidsubstrate thickness

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The patent merges two separate gate electrodes into a single shared gate electrode that controls both TFTs. The gate electrode is positioned between the two OLEDs and serves as the gate for both transistors simultaneously, reducing the number of components and substrate thickness while maintaining independent driving capability through separate source and drain electrodes for each TFT

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single gate electrode performs multiple functions by serving as the gate electrode for both the first TFT and the second TFT. This multi-functional design allows one component to control two separate transistor operations, enabling independent driving of both OLEDs while reducing overall device complexity and thickness

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If two independent TFTs with separate gate electrodes are used to drive OLEDs on both side, then each OLED can be independently driven, but the production cost increases

Engineering Contradiction:

Improveindependent driving capabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges two separate gate electrodes into a single shared gate electrode that controls both TFTs. The gate electrode is positioned between the two OLEDs and serves as the gate for both transistors simultaneously, reducing the number of components and substrate thickness while maintaining independent driving capability through separate source and drain electrodes for each TFT

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single gate electrode performs multiple functions by serving as the gate electrode for both the first TFT and the second TFT. This multi-functional design allows one component to control two separate transistor operations, enabling independent driving of both OLEDs while reducing overall device complexity and thickness

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS9478595B2Double-sided display OLED array substrate, its manufacturing method, and display device

Publication Date: 2016.10.25 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a double-sided display OLED array substrate, its manufacturing method, and a display device. The double-sided display OLED array substrate includes a first base substrate, a second base substrate, a first OLED and a second OLED arranged between the first base substrate and the second base substrate, and a first TFT and a second TFT sharing an identical gate electrode and arranged between the first OLED and the second OLED, the first TFT being configured to drive the first OLED, and the second TFT being configured to drive the second OLED. According to the present disclosure, it is able to reduce a thickness of the double-sided display OLED array substrate, thereby to reduce the production cost thereof.