Array Substrate BUS Line Stacking for Narrow Frame Design
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Solution Overview
Problem
Existing touch screens face challenges in achieving high resolution and a narrow frame simultaneously due to the large area occupied by BUS lines in the peripheral region, making it difficult to optimize both parameters simultaneously.
Innovation Solution
The array substrate design involves setting BUS lines on different metal layers, allowing for partial or complete overlap of BUS line projections, which reduces the occupied area in the peripheral region and enables a narrower frame while maintaining high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of BUS lines is increased to improve resolution, then the resolution is improved, but the area occupied by BUS lines in the peripheral region increases
Solution Approach 1:
The patent applies dimensionality change by transitioning BUS lines from a two-dimensional planar arrangement to a three-dimensional stacked configuration across multiple metal layers. This allows BUS lines to overlap in the vertical dimension, effectively reducing their footprint in the peripheral region while maintaining the required number of lines for high resolution
Solution Approach 2:
The patent implements nesting by placing multiple BUS lines on different metal layers such that their projections overlap completely or partially. This nested arrangement allows one BUS line to be positioned above another, reducing the total area occupied while preserving signal integrity through vertical stacking
2Length of stationary object
If the area occupied by BUS lines is reduced to achieve a narrower frame, then the frame width is reduced, but it becomes difficult to accommodate enough BUS lines for high resolution
Solution Approach 1:
The patent resolves this contradiction by utilizing the vertical dimension through multiple metal layers. This allows the frame width to be reduced while accommodating the required number of BUS lines for high resolution by arranging them in a three-dimensional stacked configuration rather than a two-dimensional planar layout
Solution Approach 2:
The patent applies segmentation by dividing the BUS line structure across multiple metal layers (first metal layer, second metal layer, etc.). This segmentation allows the BUS lines to be distributed vertically, reducing the horizontal space required for the frame while maintaining the total number of lines needed for high resolution
Data Source
AI summary
An array substrate, a display panel, and an electronic device are provided. The array assembly includes: a substrate defining a display region and a peripheral region; gate lines and data lines which are set in the display region; touch control electrodes which are set in the display region and electrically isolated; and a first metal layer set on the substrate, which includes: touch control lines set in the display region, wherein each of the touch control lines is electrically connected with corresponding touch control electrode, and adapted to provide a first signal for the corresponding touch control electrode; and a first BUS line set in the peripheral region, where the first BUS line is adapted to provide a second signal for at least one of the touch control lines, the gate lines, and the data lines Accordingly, BUS lines are arranged on different metal layers, thus narrow frame is achieved.