OLED Array Substrate With Conductive Bridge Through Base
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional OLED display devices face issues with poor light-emitting effects due to electrical interference from the TFT structure and complex, costly manufacturing processes, particularly because of the rough surface of the pixel electrode requiring surface treatment.
Innovation Solution
An array substrate design where a through hole is formed on the base substrate with a conductive bridge connecting the OLED device to the TFT structure, reducing electrical interference and simplifying the manufacturing process by eliminating the need for surface treatment of the pixel electrode, with both the anode and cathode made from transparent conductive materials for double-sided light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel electrode of the TFT structure is used directly as the cathode or anode of the OLED device, then the manufacturing process is simplified, but the light-emitting effect deteriorates due to electrical interference from the TFT structure
Solution Approach 1:
The invention divides the electrode structure into separate components: the TFT pixel electrode and the OLED electrode are separated by an insulating layer, allowing independent optimization of each component while maintaining electrical connection through the conductive bridge
Solution Approach 2:
An insulating layer is introduced as an intermediary between the TFT pixel electrode and the OLED electrode, preventing direct electrical interference while allowing connection through the conductive bridge that penetrates the insulating layer
2Reliability
If surface treatment is applied to the rough pixel electrode before coating the light emitting layer, then the light-emitting effect improves, but the manufacturing process becomes more complicated and cost increases
Solution Approach 1:
The insulating layer is formed in advance on the pixel electrode before the OLED structure is assembled, providing a pre-prepared smooth surface that eliminates the need for subsequent surface treatment steps
Solution Approach 2:
The insulating layer serves as a mediator that provides both electrical isolation and a smooth surface for OLED coating, combining multiple functions into a single component that simplifies the manufacturing process
3Area of stationary object
If the OLED device is disposed close to the TFT structure on the same substrate surface, then the device area is reduced, but electrical interference from the TFT structure affects the OLED performance
Solution Approach 1:
The invention transitions from planar separation to three-dimensional separation by stacking the OLED device and TFT structure on opposite surfaces of the substrate, connected through vertical conductive bridges, thereby achieving both compact area and electrical isolation
4Reliability
If a conductive bridge is formed to connect the OLED device to the TFT structure through the substrate, then electrical interference is reduced, but the manufacturing process complexity increases
Solution Approach 1:
The conductive bridge is designed to serve multiple functions simultaneously: providing electrical connection between OLED and TFT, acting as a support structure, and enabling the through-substrate connection while maintaining mechanical integrity of the substrate
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces electrical interference, simplifies the manufacturing process, and achieves double-sided light emission, enhancing the display's accuracy and reducing costs.
Implementation Method 1
a through hole is formed on the base substrate and provided with a conductive bridge, and the OLED device is connected with the TFT structure through the conductive bridge
Implementation Method 2
When the OLED device operates, a voltage is applied between the cathode and the anode so as to generate an electric field at both ends of the organic light emitting layer disposed between the cathode and the anode, and hence electrons and holes can be recombined with each other in the organic light emitting layer and hence light emits
Data Source
AI summary
An array substrate, a manufacturing method thereof and a display device are provided. The array substrate comprises a base substrate (1), an organic light-emitting diode (OLED) device and a thin-film transistor (TFT) structure, the OLED device disposed on one side of the base substrate (1); the TFT structure disposed on the other side of the base substrate (1); a through hole formed on the base substrate and provided with a conductive bridge (2); and the OLED device connected with the TFT structure through the conductive bridge (2). The array substrate can avoid electrical interference of the TFT structure on the OLED device, and hence accurate drive for the OLED device can be achieved; as the OLED device can be directly formed on a surface of the base substrate, surface treatment of a pixel electrode is saved with respect to conventional OLED display device, and hence manufacturing process can be accelerated and manufacturing cost can be reduced; and as both an anode and a cathode of the OLED device are made from transparent materials, double-sided light emission can be achieved in the array substrate, and hence double-sided display can be achieved in the array substrate.