Display Panel Light-Absorbing Layer for Channel Protection
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Solution Overview
Problem
Ambient light reflection by metal components in metal oxide thin film transistor display panels causes performance degradation of the channel region, impacting stability.
Innovation Solution
Incorporation of a light-absorbing layer that covers the gap between electrodes, absorbing ambient light to protect the channel region, combined with an anti-reflection layer to reduce multiple reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal light-shielding layer and gate are used in metal oxide thin film transistor display panels, then the structure provides necessary electrical functionality and light shielding, but ambient light can be reflected by these metal components and enter the channel region, causing performance degradation
Solution Approach 1:
The patent introduces a light-absorbing layer as an intermediary component between the metal light-shielding layer/gate and the channel region. This layer absorbs ambient light that would otherwise be reflected by metal components and enter the channel region, thereby protecting the channel region from performance degradation while maintaining the electrical functionality of the metal structures.
Solution Approach 2:
The patent converts the harmful effect of ambient light reflection into a beneficial outcome by using the light-absorbing layer to capture and dissipate the reflected light energy. Instead of allowing the reflected light to degrade the channel region, the light-absorbing layer transforms this potentially harmful radiation into harmless thermal energy, thereby protecting the transistor stability.
2Reliability
If additional light-absorbing layer and anti-reflection layer are added to prevent ambient light reflection, then channel region stability is improved, but device structure becomes more complex
Solution Approach 1:
The light-absorbing layer is designed to perform multiple functions simultaneously: it absorbs ambient light to prevent channel region degradation, serves as part of the overall light shielding strategy, and maintains compatibility with the existing metal light-shielding layer and gate structure. This multi-functionality approach adds protection without requiring entirely separate systems for each function.
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
Effectively prevents performance degradation of the channel region by absorbing ambient light, enhancing stability and reducing manufacturing complexity.
Implementation Method 1
a light-absorbing layer, wherein a vertical projection of the light-absorbing layer on the base substrate covers a vertical projection of a gap between the first electrode and the second electrode
Data Source
AI summary
The present application provides a display panel and a manufacturing method thereof, wherein a projection of a light-absorbing layer in the display panel on a base substrate covers a projection of a gap between a first electrode and a second electrode on the base substrate, so as to absorb ambient light directly or indirectly irradiated on a channel region through the gap between a first electrode and a second electrode, so that the channel region on a first metal layer is well protected, which greatly reduces the problem of performance degradation of the channel region of an active layer caused by irradiation of the external ambient light.