Display Panel Light Shielding Pattern for Leakage Prevention
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Solution Overview
Problem
Current mainstream display panels using thin film transistors suffer from leakage issues due to light illumination, leading to poor electrical properties and affected display quality.
Innovation Solution
A display panel design that includes a substrate with scan and data lines, pixel structures with display transistors and pixel electrodes, and a light shielding pattern layer between the first gate electrode and the substrate, which helps prevent light-induced leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light shielding pattern layer is added to prevent light-induced leakage, then the electrical properties of pixel structures are improved, but the device complexity increases
Solution Approach 1:
A light shielding pattern layer is introduced as an intermediary component between the substrate and the gate electrode. This layer specifically blocks light from reaching the gate electrode and semiconductor pattern, preventing light-induced leakage while maintaining the overall transistor structure and functionality.
Solution Approach 2:
The light shielding pattern layer is segmented into specific regions that align with the gate electrode and semiconductor pattern areas. This segmentation approach applies light shielding only where necessary (under the gate electrode and semiconductor regions) rather than uniformly across the entire device, reducing unnecessary complexity while maintaining effectiveness.
2Reliability
If the light shielding pattern layer completely covers the gate electrode, then light-induced leakage is prevented, but the flatness of film layers deteriorates
Solution Approach 1:
The light shielding pattern layer is designed with local quality variations - it is present only in specific regions where light blocking is necessary (under the gate electrode and semiconductor pattern) and absent in other regions. This localized approach prevents light-induced leakage in critical areas while maintaining good flatness in areas where light shielding is not required, thus preserving overall film layer quality.
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 implementation of the light shielding pattern layer effectively prevents light-induced leakage in display transistors, ensuring better operating electrical properties of the display panel under various light sources, and improves the flatness of film layers, enhancing the yield of subsequent film-forming processes.
Implementation Method 1
The light shielding pattern layer is disposed between the first gate electrode and the substrate... effectively prevents light-induced leakage in display transistors
Data Source
AI summary
A display panel including a substrate, scan lines, data lines, pixel structures, and a light shielding pattern layer is provided. The substrate is provided with a display area. The scan lines and the data lines are disposed on the substrate, and intersect with each other. The pixel structures are disposed in the display area, and each includes a display transistor and a pixel electrode. The display transistor includes a first semiconductor pattern, a first gate electrode, a first source electrode, and a first drain electrode. The first gate electrode is disposed between the substrate and the first semiconductor pattern, and is electrically connected to one of the scan lines. The first source electrode is electrically connected to one of the data lines. The pixel electrode is electrically connected to the first drain electrode of the display transistor. The light shielding pattern layer is disposed between the first gate electrode and the substrate, and has a first opening overlapping the first gate electrode.