Display Substrate Driving Layout for Post-Cut Voltage Continuity
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Solution Overview
Problem
When a large-size display substrate is cut to form a small-size substrate, the initial voltage line is often severed, leading to functional failure due to the horizontal cutting direction intersecting the gate line, which disrupts the normal operation of the display substrate.
Innovation Solution
The display substrate design includes a base substrate with a driving module comprising N driving circuits connected in series, featuring connection lines that overlap with the initial voltage and input cascade lines on different layers, allowing for electrical connection through welding or other means to maintain functionality after cutting, ensuring the initial voltage line is connected to input terminals of specific driving circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a horizontal cut is performed to reduce display substrate size, then productivity and cost efficiency are improved, but the initial voltage line is severed causing functional failure
Solution Approach 1:
The patent introduces a connection line that extends in a direction intersecting the initial voltage line, creating an overlapping portion when projected on the base substrate. This multi-dimensional routing allows the connection line to bridge across the cut line, maintaining electrical connectivity after horizontal cutting while enabling mass production of multiple small substrates from a large substrate.
2Ease of manufacture
If the same mask design is reused for both large and small panels, then manufacturing cost is reduced, but the initial voltage line configuration must accommodate different substrate sizes
Solution Approach 1:
The connection line is designed with a universal configuration that serves multiple functions: it connects driving circuits to the initial voltage line, crosses the cut line to maintain connectivity after cutting, and provides overlapping portions that can be welded or otherwise connected. This single design element enables the same mask to produce both large and small substrates with appropriate functionality.
Solution Approach 2:
The display substrate is segmented into multiple small substrates through horizontal cutting, while the connection line provides a bridging mechanism that maintains electrical continuity across the segmentation boundaries. This allows the system to function as if unsegmented while enabling flexible substrate size production.
Data Source
AI summary
A driving module includes N driving circuits connected in series; the driving circuit includes an input terminal; N is a positive integer; input terminals of first a stages of driving circuits included in the driving module are electrically connected to an initial voltage line; a is a positive integer; an input terminal of an nth stage of driving circuit included in the driving module is electrically connected to an output terminal of an (n−m)th stage of driving circuit included in the driving module through an input cascade line; n and m are positive integers, and m is less than n; the driving module further includes at least one connection line, there is an overlapping portion between an orthographic projection of the connection line on the base substrate and an orthographic projection of the initial voltage line on the base substrate.