Display Data Line Asymmetry for Brightness Uniformity
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Solution Overview
Problem
Conventional display apparatuses experience issues where the brightness of (sub)-pixels can vary even when the same data signal is applied, leading to inconsistencies in image quality.
Innovation Solution
A display apparatus is designed with a substrate, first and second data lines, and a bridge line. The bridge line is electrically connected to the second data line and crosses the first data line on a different layer, with the length of the first data line being greater than the length of the second data line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data lines of equal length are used in conventional display apparatuses, then the structure is simple and easy to manufacture, but brightness inconsistencies occur between (sub)-pixels leading to poor image quality
Solution Approach 1:
The patent applies local quality by making the first data line longer than the second data line to compensate for voltage drop differences. This asymmetric design ensures that (sub)-pixels connected through the bridge line receive adequate voltage, achieving uniform brightness across the display while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The patent implements asymmetry by intentionally designing the first data line with a greater length than the second data line. This asymmetric configuration balances the electrical characteristics of different data line paths, ensuring consistent voltage delivery to all (sub)-pixels and eliminating brightness inconsistencies without requiring complex additional components.
2Manufacturing precision
If a bridge line is added to connect data lines, then brightness consistency is improved, but the device structure becomes more complex
Solution Approach 1:
The patent merges the function of voltage compensation into the existing data line structure by introducing a bridge line that electrically connects the first and second data lines. This integration approach achieves brightness uniformity without adding separate compensation circuits or complex control mechanisms, thereby limiting the increase in device complexity.
Solution Approach 2:
The bridge line acts as an intermediary element that facilitates voltage distribution between the first and second data lines. By positioning the bridge line to cross the first data line on a different layer, it provides a simple electrical connection that balances voltage delivery and ensures consistent brightness across (sub)-pixels without requiring complex multi-layer routing.
Data Source
AI summary
A display apparatus includes a substrate, a first data line, a second data line, and a bridge line. The substrate includes a display area and a peripheral area outside the display area. The first data line is disposed over the substrate and crosses the display area. The second data line is disposed over the substrate and is disposed in a first direction from the first data line. The second data line crosses the display area. The bridge line includes one end electrically connected to the second data line and crosses, on a different layer from a layer on which the first data line is disposed, the first data line in the display area. A length of the first data line is greater than a length of the second data line.