Array Substrate Shorting Bar Integration for Mother Glass Utilization
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Solution Overview
Problem
Conventional liquid crystal display array substrates have low utilization of mother glass due to the space occupied by shorting bars used for testing scan and data lines, limiting the number of array substrates that can be cut from a single mother glass.
Innovation Solution
The array substrate design incorporates a thinner common electrode bus and strategically positioned shorting bars within the non-display region, allowing for efficient testing of data and scan lines without increasing the substrate area, enabling more array substrates to be arranged on a mother glass by abutting them in groups, and utilizing these shorting bars as common electrode buses post-testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shorting bars are positioned outside the array substrate on the mother glass, then data lines and scan lines can be tested, but the utilization of the mother glass is reduced
Solution Approach 1:
The patent merges the shorting bar function with the common electrode bus by making the common electrode bus extend to the edge of the array substrate and connect with shorting bars. This integration eliminates the need for separate shorting bar space outside the substrate, allowing test signals to be transmitted through the integrated structure while maximizing mother glass utilization.
Solution Approach 2:
The common electrode bus is designed to serve dual functions: it acts as both the common electrode for display operation and as a test signal transmission path. By extending the common electrode bus to connect with shorting bars at the substrate edge, the same structural element performs both display and testing functions, eliminating the need for dedicated test-only structures.
2Area of stationary object
If the common electrode bus is made thinner to save space, then more array substrates can be arranged on the mother glass, but the resistance of the common electrode bus increases
Solution Approach 1:
The patent combines the common electrode bus with the shorting bar structure, where the common electrode bus extends to the substrate edge and connects with shorting bars. This merged structure allows the thin common electrode bus to be compensated by the parallel connection with shorting bars, maintaining low resistance while saving space.
Solution Approach 2:
The shorting bars are designed to serve dual purposes: they function as test signal access points during manufacturing and as additional conduction paths for the common electrode signal during operation. This multi-functionality allows the same elements to address both the resistance issue and the space constraint.
Data Source
AI summary
An array substrate for a liquid crystal display, a liquid crystal display comprising the array substrate, and a mother glass from which the array substrate is cut off, are provided. The array substrate comprises a plurality of scan lines; a plurality of data lines crossing with the plurality of scan lines; and a common electrode bus, wherein each of the array substrate further comprises a shorting bar which transmits the same signal as a signal that the common electrode bus transmits during operation of the corresponding liquid crystal display. The invention both improves the utilization of a mother glass and allows testing the data lines and/or scan lines with shorting bars.