Flexible OLED Touch Display Cathode Layer Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for creating flexible touch control display screens increase the overall thickness due to the need for an additional touch control screen bonded onto an OLED display, complicating the manufacturing process and increasing costs.
Innovation Solution
A flexible touch control display screen design that integrates inductive electrodes onto the OLED cathode layer and forms touch control driving electrodes on an encapsulation layer, using a dual-layer structure with a silver nanowire network and regular or irregular polygon sub-electrodes, reducing thickness and simplifying the bonding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate touch control screen is made and bonded onto the OLED display, then touch control functionality is achieved, but the overall thickness increases
Solution Approach 1:
The patent merges the OLED cathode layer with the touch control driving electrode layer by using the same transparent conductive oxide layer for both display and touch control functions. The cathode layer is patterned to serve dual purposes: as the electron injection electrode for OLED and as the driving electrode for capacitive touch sensing, eliminating the need for a separate touch screen layer
Solution Approach 2:
The transparent conductive oxide cathode layer performs multiple functions simultaneously: it serves as the electron injection electrode for OLED operation, the driving electrode for touch control, and provides optical transparency. This multi-functionality reduces the number of layers needed while maintaining both display and touch control capabilities
2Reliability
If a separate touch control screen is made and bonded onto the OLED display, then touch control functionality is achieved, but the manufacturing process becomes more complex
Solution Approach 1:
The patent combines the OLED fabrication process with the touch control electrode formation process. The cathode layer deposition and patterning steps serve both OLED and touch control functions, eliminating separate bonding steps and reducing manufacturing process complexity
Solution Approach 2:
The touch control driving electrode is formed during the OLED cathode fabrication process itself, before the encapsulation and other subsequent steps. This preliminary formation of the touch electrode structure avoids later bonding operations and simplifies the overall manufacturing sequence
Data Source
AI summary
A flexible touch control display screen includes an OLED display layer and a driving module. The OLED display layer is sequentially layer-stacked thereon with a cathode layer connected with the driving module and an encapsulation layer covering the cathode layer. The cathode layer constitutes an inductive electrode layer or a touch control driving electrode layer, which corresponds to the cathode layer. The encapsulation layer is disposed thereon with the touch control driving electrode layer or the inductive electrode layer. In a display stage of the flexible touch control display screen, the driving module applies display driving voltage on the cathode layer, and in a touch stage of the flexible touch control display screen, the driving module applies touch control voltage on the inductive electrode layer or the touch control driving electrode layer of the cathode layer. Also provided is a fabricating method for a flexible touch control display screen.