Transparent Display Substrate Light-Blocking Member for TFT Stability
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Solution Overview
Problem
Transparent display devices face issues with the deterioration of thin-film transistors due to light irradiation, particularly ultraviolet light, leading to reduced stability and performance over time.
Innovation Solution
A substrate with a light-blocking member, including a reflective layer and an ultraviolet blocking wall, is integrated into the light-emitting area to block external light from reaching the thin-film transistor, effectively reducing the impact of light on the active layer and enhancing the transistor's stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the transparent area is provided to enable light transmission for display functionality, then the transparency and display quality are improved, but light (especially ultraviolet light) can laterally irradiate the thin-film transistor through the transparent area, causing deterioration of the active layer and reducing device stability
Solution Approach 1:
A light blocking member is introduced as an intermediary element between the transparent area and the thin-film transistor. This member includes a reflective layer that reflects incident light away from the transistor, and an ultraviolet blocking wall that specifically blocks ultraviolet light, thereby preventing light from laterally irradiating the transistor while maintaining the transparency function
Solution Approach 2:
The light blocking member is segmented into distinct functional components: a reflective layer for general light reflection and an ultraviolet blocking wall for specific ultraviolet protection. This segmentation allows each component to perform its specialized function effectively, with the reflective layer handling visible light and the ultraviolet blocking wall handling UV radiation
2Reliability
If a light blocking member is added to protect the thin-film transistor from light irradiation, then the transistor stability and device yield are improved, but the device structure becomes more complex
Solution Approach 1:
The light blocking member is merged with the existing pixel structure by positioning it within the light-emitting area and integrating it with the thin-film transistor layout. The reflective layer and ultraviolet blocking wall are combined into a single integrated component that performs multiple protection functions simultaneously, reducing the need for separate protective structures
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 solution significantly improves the long-term stability and yield of transparent display devices by protecting the thin-film transistor from light-induced degradation, ensuring high display quality and extended product life.
Implementation Method 1
the light blocking member includes a reflective layer, the thin-film transistor includes a plurality of insulating layers, and the reflective layer covers at least part of the plurality of insulating layers on a side thereof facing the transparent area
Implementation Method 2
the light blocking member further comprises an ultraviolet blocking wall, the ultraviolet blocking wall is located in the light-emitting area
Data Source
AI summary
The present disclosure provides a substrate, a manufacturing method thereof, and a transparent display device. The substrate comprising: a plurality of pixel units, at least a part of which includes a light-emitting area and a transparent area, and the light-emitting area includes a thin-film transistor; a light blocking member disposed in the light-emitting area and configured to block light that is directed to the thin-film transistor through the transparent area.