Display Panel Light-Blocking Structure for Oxide Transistor Leakage
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Solution Overview
Problem
The stability of transistors in display devices is affected by light irradiation, leading to leakage currents and compromised display performance.
Innovation Solution
A display panel design that includes a substrate, a driving circuit with both oxide and silicon transistors, and a first light blocking layer. The orthographic projection of the light blocking layer overlaps the active layer of the oxide transistor, preventing light from irradiating the active layer and reducing leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oxide transistor is used in the driving circuit, then the display performance can be improved, but the stability of the transistor deteriorates due to light irradiation causing leakage currents
Solution Approach 1:
A light blocking layer is introduced as an intermediary component between the light source and the oxide transistor's active layer. This layer selectively blocks light from reaching the active layer while allowing the transistor to function normally, thereby preventing light-induced leakage currents without affecting the transistor's performance benefits
Solution Approach 2:
The invention converts the harmful effect of light irradiation into a controlled parameter by using the light blocking layer to define specific protection zones. The layer is strategically positioned to block light only where needed (overlapping the active layer projection) while maintaining other functional areas, thus transforming the potential harm into a precise protective measure
2Reliability
If a light blocking layer is added to prevent light irradiation, then the transistor stability is improved, but the device complexity increases
Solution Approach 1:
The light blocking layer is merged with existing structural elements of the display panel, such as being integrated into the substrate layer or other existing functional layers. This integration approach adds the light blocking function without creating entirely separate components, thereby reducing the increase in device complexity
Solution Approach 2:
The light blocking layer is designed to serve multiple functions: it blocks light from reaching the active layer, provides structural support, and can be integrated with other functional layers. This multi-functionality reduces the need for additional separate components, thereby minimizing the increase in device 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
The implementation of the light blocking layer enhances the stability of the oxide transistor and improves the display quality by preventing light-induced leakage currents.
Implementation Method 1
The first light blocking layer may prevent the light from irradiating the first active layer
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a substrate, a driving circuit, and a first light blocking layer. The driving circuit includes an oxide transistor and a silicon transistor disposed at the substrate. The oxide transistor includes a first active layer. An orthographic projection of the first light blocking layer on the substrate at least overlaps an orthographic projection of the first active layer on the substrate.