Array Substrate Trace Region Layout for Higher LCD Transmittance
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Solution Overview
Problem
Current liquid crystal display panels face issues of decreased aperture ratio and low light transmittance due to the opacity of scan lines and thin film transistors in the trace region, which limits the effectiveness of large-size display panels.
Innovation Solution
The array substrate design includes a trace region divided into a first region with thin film transistors and a second region without transistors, where the pixel electrode region is extended into the second region, reducing opaque areas and increasing the aperture ratio, and the scan lines are narrower in the second region to enhance light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scan lines and thin film transistors are arranged in the trace region to enable pixel control, then the display panel can function properly, but the aperture ratio decreases and light transmittance is reduced
Solution Approach 1:
The trace region is divided into a first region containing thin film transistors and a second region without transistors, separating the control function from the light transmission area to increase aperture ratio
Solution Approach 2:
The pixel electrode region is extended into the second region of the trace region, utilizing the spatial dimension to expand the light transmission area without compromising pixel control functionality
2Ease of manufacture
If scan lines are made opaque to ensure electrical connection and control, then the display panel can be manufactured, but light transmittance is reduced
Solution Approach 1:
The trace region is segmented into areas with different aperture ratios, allowing scan lines to maintain opacity where needed for electrical connection while being narrower or absent in the second region to improve light transmittance
Data Source
AI summary
An array substrate and a display terminal are provided. The display panel includes the plurality of stacked metal sub-layers and the first passivation sub-layer and the second passivation sub-layer stacked. The first passivation sub-layer is disposed between the metal layer and the second passivation layer. Material of the first passivation sub-layer includes silicon nitride. The first passivation sub-layer covers the untidy area at the ends of the molybdenum-titanium alloy thin layer to avoid from detachment of the passivation layer, and meanwhile to solve the issues of simplifying the manufacturing process of the display panel, and to avoid from oxidation of the bonding pads.