Display Panel Fanout Wire Layout for Narrow-Bezel Touch Impedance
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Solution Overview
Problem
The increasing complexity of display panels due to numerous signal lines leads to power consumption and heating issues, affecting the touch performance of in-cell capacitive touch screens, especially in narrow border designs where impedance values exceed threshold values.
Innovation Solution
A display panel design that includes a fanout region with fanout wires of varying widths, where the first wire segment is adjusted to match or differ from the second fanout wire's width based on impedance values, reducing panel impedance and maintaining narrow border configurations by only widening specific wire segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the width of wire is narrowed down to achieve narrow border design, then the border width is reduced, but the impedance value of the wire exceeds the impedance threshold value set by touch chip, causing power consumption and heating issues
Solution Approach 1:
The patent applies local quality by differentiating the width of fanout wires based on their position and function. Specifically, the first fanout wire has a first width while the second fanout wire has a second width that is greater than the first width. This localized variation in wire width allows the border to remain narrow overall while specific critical wires maintain adequate impedance levels, resolving the contradiction between narrow border design and impedance requirements.
2Length of stationary object
If the width of wire is narrowed down to achieve narrow border design, then the border width is reduced, but power consumption and heating issues occur
Solution Approach 1:
The patent implements local quality by selectively widening only the second fanout wire while keeping the first fanout wire at a narrower width. This targeted approach reduces power consumption and heating in non-critical areas while providing adequate current carrying capacity in critical areas, thus resolving the contradiction between narrow border design and power consumption requirements.
3Length of stationary object
If the width of wire is narrowed down to achieve narrow border design, then the border width is reduced, but the touch function is adversely affected
Solution Approach 1:
The patent applies local quality by differentiating wire widths in the fanout region to preserve touch function. The second fanout wire, which is wider, is positioned to serve touch-related signal transmission, ensuring adequate signal quality for touch functionality. Meanwhile, the first fanout wire maintains a narrower width for other functions, achieving a balance between narrow border design and preserved touch function.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a display region, a non-display region, and multiple drive signal lines. A fanout region and a connection terminal region are disposed in the non-display region. Multiple fanout wires are arranged in the fanout region. Multiple connection terminals are arranged in the connection terminal region. The fanout wires include a first fanout wire and a second fanout wire. The first fanout wire includes a first wire segment. The first wire segment has a width different from the width of the second fanout wire. The length of the first wire segment is equal to at least a portion of the length of the first fanout wire.