Integrated OLED Photodiode Display with Shared Electrode
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Solution Overview
Problem
Current display apparatuses lack high-resolution, multifunctional, and high-light-sensitivity capabilities, particularly in portable devices, where they are expected to serve both as display and light-detection tools, such as touch sensors and image sensors, without increasing component count or manufacturing complexity.
Innovation Solution
A display apparatus integrating light-receiving and light-emitting devices with shared layers, such as organic photodiodes and organic light-emitting diodes, where the light-receiving device includes a first electrode, an active layer, and a second electrode, and the light-emitting device includes a third electrode and a light-emitting layer, with overlapping active and light-emitting layers for enhanced resolution and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate light-detection components are added to achieve high light sensitivity, then light sensitivity is improved, but device complexity increases
Solution Approach 1:
The patent combines light-receiving and light-emitting devices into a single integrated structure where the light-receiving device includes a first electrode, active layer, and second electrode, while the light-emitting device includes a third electrode, light-emitting layer, and the same second electrode. This merging eliminates separate components and achieves high light sensitivity through the integrated photodiode structure.
Solution Approach 2:
The second electrode serves dual functions as both the cathode for the light-receiving device (photodiode) and the anode for the light-emitting device (OLED), enabling the display apparatus to perform both light detection and light emission functions through shared components, thereby reducing overall device complexity.
2Adaptability or versatility
If multiple separate devices are used for display and light detection, then functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent integrates multiple functional devices (light-receiving device and light-emitting device) into a single unified structure that can be manufactured as one component, reducing the number of separate manufacturing processes and assembly steps required while maintaining multifunctionality.
Solution Approach 2:
The display apparatus achieves multifunctionality by incorporating both light-receiving and light-emitting capabilities within the same device structure, allowing it to serve as both a display and a light-detection tool (such as touch sensor or image sensor) without requiring separate components for each function.
3Weight of moving object
If device thickness is reduced to improve portability, then weight is improved, but manufacturing precision requirements increase
Solution Approach 1:
By merging the light-receiving and light-emitting devices into a single integrated structure with shared electrodes and layers, the patent reduces the overall device thickness and weight while the overlapping configuration of the active layer and light-emitting layer provides inherent alignment guidance that manages manufacturing precision requirements.
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 integration enables a high-resolution, multifunctional display with high light sensitivity, reducing the need for separate light-detection components and simplifying manufacturing, while maintaining high display quality and flexibility.
Implementation Method 1
light-receiving device includes a first electrode, an active layer over the first electrode, and a second electrode over the active layer
Implementation Method 2
light-emitting device includes a third electrode, a light-emitting layer over the third electrode
Data Source
AI summary
A high-resolution display apparatus having a function of detecting light is provided. The display apparatus includes a light-receiving device and a light-emitting device, the light-receiving device includes a first electrode, an active layer over the first electrode, and a second electrode over the active layer, the light-emitting device includes a third electrode, a light-emitting layer over the third electrode, and the second electrode over the light-emitting layer, and a part of the active layer and a part of the light-emitting layer overlap with each other in an outer side of the first electrode and an outer side of the third electrode in a top view.