OLED Array Substrate with Integrated Light Sensor Electrode
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large-sized OLED displays face complexities in manufacturing processes and structure due to the need for multiple electrode layers and auxiliary cathodes, which complicate light compensation and increase IR drop.
Innovation Solution
An array substrate design featuring light sensors with a first electrode, photosensitive layer, and second electrode in sequence, connected via a via hole through a flat layer, sharing a connected electrode layer that links the auxiliary cathode and cathode, reducing the need for separate electrode layers and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple electrode layers and auxiliary cathodes are used for light compensation in large-sized OLED displays, then light compensation performance is improved, but manufacturing process complexity and structural complexity increase
Solution Approach 1:
The patent combines the auxiliary cathode and the second electrode of the light sensor into a single integrated electrode structure. This merging eliminates the need for separate auxiliary cathode and second electrode layers, thereby reducing structural complexity while maintaining the light compensation function through the integrated electrode's ability to serve both as a light sensor electrode and an auxiliary cathode.
Solution Approach 2:
The integrated electrode structure serves multiple functions simultaneously: it acts as the second electrode for the light sensor, functions as an auxiliary cathode for light compensation, and provides electrical connection through via holes. This multi-functionality reduces the number of separate components needed while achieving both light sensing and light compensation objectives.
2Reliability
If multiple electrode layers and auxiliary cathodes are used for light compensation in large-sized OLED displays, then light compensation performance is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the fabrication of the auxiliary cathode and the second electrode into a single manufacturing process step. By integrating these structures, the patent reduces the number of deposition and patterning steps required, thereby simplifying the manufacturing process while maintaining light compensation performance.
Solution Approach 2:
The integrated electrode structure is fabricated using a single set of manufacturing processes that simultaneously create both the auxiliary cathode and light sensor electrode functionalities. This approach eliminates the need for separate fabrication sequences, reducing process complexity while achieving dual functionality.
3Adaptability or versatility
If separate electrode layers are used for light sensors and auxiliary cathodes, then functional independence is improved, but device structure becomes more complex
Solution Approach 1:
The patent combines the auxiliary cathode and light sensor second electrode into a single integrated structure that maintains functional independence through spatial separation and selective connectivity. The integrated electrode can independently perform light sensing through its photosensitive region while simultaneously providing auxiliary cathode function in other regions, without requiring separate physical structures.
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 manufacturing processes and simplifies the structure of large-sized OLED displays by sharing the connected electrode layer, enhancing light sensor functionality and reducing IR drop.
Implementation Method 1
each of the light sensors includes a first electrode, a photosensitive layer and a second electrode arranged in sequence on the substrate
Data Source
AI summary
The present disclosure provides an array substrate, an electroluminescent panel and a display device, to solve the problems of more manufacturing processes and complex structures of the large-sized OLED display panel in the related art. The array substrate includes: a substrate, a plurality of light sensors on the substrate, a flat layer on the light sensor, and a connected electrode layer on the flat layer, wherein each of the light sensors includes a first electrode, a photosensitive layer and a second electrode arranged in sequence on the substrate; wherein the connected electrode layer is connected with the second electrode through a via hole penetrating through the flat layer.