Routing Signal Lines Around Non-Display Region in LCD
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Solution Overview
Problem
In active-matrix-type liquid crystal display devices with opening portions, the arrangement of signal lines around the non-display region increases the occupied area, narrowing the liquid crystal display region.
Innovation Solution
The configuration involves routing gate and drain signal lines around the non-display region and physically separating common signal lines, which are then electrically connected via connection lines that do not traverse the non-display region, allowing for reduced area occupation by signal lines on the periphery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If common signal lines are arranged to traverse the non-display region, then the signal lines can be routed simply, but the occupied area increases and the liquid crystal display region is narrowed
Solution Approach 1:
The common signal lines are segmented into two separate groups: first common signal lines arranged on one side of the non-display region and second common signal lines arranged on the other side. This segmentation allows each group to be routed independently without traversing the non-display region, reducing the occupied area while maintaining manufacturing simplicity through systematic arrangement.
Solution Approach 2:
The patent transitions from a one-dimensional routing approach (lines traversing directly across the non-display region) to a two-dimensional arrangement (lines distributed on both sides of the non-display region). This dimensional change allows signal lines to bypass the non-display region while maintaining electrical connectivity, thereby expanding the liquid crystal display region.
2Area of stationary object
If signal lines are routed around the non-display region, then the liquid crystal display region is expanded, but the signal line arrangement becomes more complex
Solution Approach 1:
The patent applies different arrangement strategies to different regions: first common signal lines are locally arranged on one side of the non-display region, while second common signal lines are locally arranged on the other side. This localized arrangement reduces overall complexity by dividing the routing problem into manageable regional segments rather than requiring complex global routing.
Solution Approach 2:
The patent merges the functionality of common signal lines by electrically connecting the first and second common signal lines through conductive structures. This merging allows separate physical arrangements to work together as a unified signal distribution system, achieving expanded display area without proportionally increasing system complexity.
Data Source
AI summary
A display device in which a non-display region is formed in a portion of a display region which is formed of a mass of the pixels, out of the plurality of gate signal lines and the plurality of drain signal lines, the gate signal lines and the drain signal lines which are arranged so as to traverse the non-display region when the gate signal lines and the drain signal lines straightly extend imaginarily are formed in a pattern where the gate signal lines and the drain signal lines are routed around the non-display region.