Blocking Layer Photoelectric Conversion Device Electronic Shutter Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing photoelectric conversion devices face challenges in performing appropriate electronic shutter operations due to varying electric potentials across pixel electrodes, leading to inconsistent signal generation and reduced image quality.
Innovation Solution
A photoelectric conversion device configuration that includes a semiconductor substrate with a photoelectric conversion layer, a first blocking layer between the photoelectric conversion layer and the pixel electrode, and a second blocking layer between the photoelectric conversion layer and the upper electrode, which controls the injection of electric charges and prevents recombination, allowing for consistent electronic shutter operation across pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If voltage is applied to the auxiliary electrode to control sensitivity, then photoelectric conversion efficiency is improved, but signal charge generation may be prevented leading to electronic shutter operation issues
Solution Approach 1:
The electrode structure is segmented into multiple functional components: a first auxiliary electrode for sensitivity control and a second auxiliary electrode for charge polarity control. This segmentation allows independent optimization of photoelectric conversion efficiency and signal charge generation consistency, resolving the technical contradiction between these two parameters.
Solution Approach 2:
A blocking layer is introduced as an intermediary between the photoelectric conversion layer and the pixel electrode. This blocking layer prevents opposite polarity charges from being injected into the pixel electrode, ensuring consistent signal charge generation while allowing the auxiliary electrode to maintain photoelectric conversion efficiency.
2Reliability
If blocking layer is added to prevent charge injection, then charge retention consistency is improved, but device structure becomes more complex
Solution Approach 1:
The blocking layer is designed to serve multiple functions simultaneously: it blocks opposite polarity charges from injecting into the pixel electrode, facilitates injection of correct polarity charges, and maintains overall device structure compatibility. This multi-functionality reduces the need for additional separate components, mitigating the increase in device complexity.
3Extent of automation
If voltage control is used to prevent charge injection for electronic shutter, then shutter operation is achieved, but image contrast deteriorates due to inconsistent charge retention
Solution Approach 1:
The blocking layer is strategically positioned at specific locations where charge injection occurs, providing localized charge control. This local quality approach ensures that charge retention consistency is improved precisely where needed, maintaining image contrast while enabling electronic shutter operation through voltage control.
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
The proposed configuration enables effective electronic shutter operation by preventing the injection of opposite polarity charges and maintaining signal accumulation, thereby enhancing image contrast and quality by ensuring consistent charge retention across pixels.
Implementation Method 1
a photoelectric conversion layer located between the first electrode unit and the second electrode unit
Implementation Method 2
a blocking unit located between the photoelectric conversion layer and the second electrode unit and configured to cause electric charge having a first polarity to be injected from the photoelectric conversion layer into the second electrode unit and to prevent electric charge having a second polarity opposite to the first polarity from being injected from the photoelectric conversion layer into the second electrode unit
Data Source
AI summary
A photoelectric conversion device includes a blocking unit located between a photoelectric conversion layer and a second electrode unit and configured to cause electric charge having a first polarity to be injected from the photoelectric conversion layer into the second electrode unit and to prevent electric charge having a second polarity opposite to the first polarity from being injected from the photoelectric conversion layer into the second electrode unit, and a voltage supply unit configured to supply a second voltage to one of a first electrode unit and the second electrode unit such that electric charge having the first polarity is prevented from being injected from the photoelectric conversion layer into the second electrode unit.