Display Signal Line Stacking for Narrow Bezel
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Solution Overview
Problem
As display devices increase in size, the non-display area (bezel area) widens due to increased signal lines, leading to decreased aesthetic quality and uniform resistance values in data signal lines, which affects display quality.
Innovation Solution
The display device incorporates a base layer with specific portions and light emitting elements, where signal lines are stacked in layers and connected by different metal materials to maintain uniform resistance and reduce bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of signal lines is increased to support higher resolution, then the resolution of the display device is improved, but the width of the non-display area (bezel) increases, decreasing aesthetic quality
Solution Approach 1:
The patent transitions from planar signal line arrangement to a three-dimensional stacked configuration. Multiple signal lines are arranged in different layers (first layer, second layer, third layer) with vertical connections through contact holes, enabling more signal lines to be packed within the same horizontal footprint, thus reducing bezel width while supporting higher resolution
Solution Approach 2:
The patent implements a nested structure where signal lines in different layers are vertically aligned and connected through contact holes. The first, second, and third signal lines are nested in the same horizontal position across different layers, maximizing space utilization and reducing the horizontal space required for signal distribution
2Area of stationary object
If the display device size is increased, then the display area is improved, but the difference in length between data signal lines increases, causing non-uniform resistance values and decreased display quality
Solution Approach 1:
The patent uses vertical stacking of signal lines in multiple layers to equalize the effective current path length. By routing signals through different layers and connecting them vertically, the patent compensates for horizontal length differences, ensuring more uniform resistance values across the enlarged display area
Solution Approach 2:
The patent applies different metal materials with different resistivities to different layers of signal lines. By selecting materials with appropriate resistivity characteristics for each layer, the patent compensates for variations in path length and achieves uniform overall resistance across all signal lines, regardless of their horizontal length differences
Data Source
AI summary
A display device is provided. The display device includes first, second and third front signal lines disposed on a first portion and electrically connected to light emitting elements, connection lines overlapping a second portion, and first, second and third rear signal lines disposed on a third portion. The first, second and third front signal lines are disposed on different layers. The first front signal line and the first rear signal line are disposed on a same layer. The second front signal line and the second rear signal line are disposed on a same layer. The third front signal line and the third rear signal line are disposed on a same layer. The connection lines electrically and selectively connect the front signal lines and the rear signal lines.