Display Light Receiving Layer With N-Dopant Electron Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electronic devices with touch-sensitive displays face challenges in efficiently converting incident light into electrical signals for accurate input sensing, particularly due to limitations in the sensitivity and efficiency of light receiving elements.
Innovation Solution
The electronic device incorporates a light receiving element with an electron extraction layer containing n-dopant materials like Ca, Yb, K, Cs, Rb, or Li, which enhances the conversion of light into electrical signals by facilitating easier electron transfer, and is distinguished from the light emitting element by a pixel definition layer, allowing for improved photoelectric efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light receiving element is used to sense external inputs, then the device can detect touch or biometric data, but the sensitivity and conversion efficiency of the light receiving element is insufficient
Solution Approach 1:
The patent introduces an electron extraction layer with specifically selected materials (n-dopant materials such as Li, Na, K, Rb, Cs, or their compounds) that have appropriate work functions or HOMO levels to optimize electron extraction. This changes the energy level parameters of the light receiving element to improve both sensitivity and conversion efficiency simultaneously
Solution Approach 2:
The patent employs composite material structures in the light receiving element, combining the light receiving layer with an electron extraction layer containing n-dopant materials. This composite structure enhances the overall performance by leveraging the complementary properties of different materials to achieve high sensitivity and efficient conversion
2Adaptability or versatility
If the display element layer includes both light emitting element and light receiving element, then the device integrates display and sensing functions, but the structure becomes more complex
Solution Approach 1:
The patent merges the light emitting element and light receiving element into a single display element layer, allowing both display and sensing functions to be integrated in one structure. The pixel definition layer distinguishes between the two elements while they share common structural components, reducing overall device complexity despite the dual functionality
Solution Approach 2:
The display element layer is designed with multi-functionality, where the same layer structure serves both light emission for display and light reception for sensing. The use of common materials and structural elements for both functions enhances adaptability while managing complexity
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 configuration significantly increases the sensitivity and efficiency of light conversion, enabling more accurate sensing of external inputs such as touch or biometric data, thereby enhancing the overall performance of touch-sensitive displays.
Implementation Method 1
a light receiving layer disposed between the hole transport region and the electron transport region and to convert light incident thereto into an electrical signal
Implementation Method 2
an electron extraction layer disposed between the light receiving layer and the electron transport region and including an n-dopant material... facilitate easier electron transfer
Data Source
AI summary
An electronic device includes a base layer and a display element layer including a pixel definition layer having an opening defined therethrough, a light emitting element, and a light receiving element. Each of the light emitting element and the light receiving element includes a first electrode, a hole transport region disposed on the first electrode, an electron transport region disposed on the hole transport region, and a second electrode disposed on the electron transport region. The light emitting element includes a light emitting layer disposed between the hole transport region and the electron transport region. The light receiving element includes a light receiving layer disposed between the hole transport region and the electron transport region and an electron extraction layer, including an n-dopant material, disposed between the light receiving layer and the electron transport region. The light receiving element converts a light incident thereto into an electrical signal.