Array Substrate Testing via Balanced Polarity Switching
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Solution Overview
Problem
Current testing methods for array substrates in liquid crystal display apparatuses are unsatisfactory due to unstable voltages on common electrodes, as the quantity of testing signals with opposite polarities supplied to data wires is not balanced, leading to interference and unsatisfactory testing effects.
Innovation Solution
The array substrate design includes multiple sub-pixels arranged in a matrix with switch units and testing ends, where sub-pixels with the same serial number in alternately arranged groups are connected to the same testing end, allowing testing signals with equal positive and negative polarities to be applied, ensuring balanced voltage on common electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If testing signals are supplied to the array substrate through data wires, then the testing effect can be evaluated, but the voltage on common electrodes becomes unstable due to unbalanced polarity quantities
Solution Approach 1:
The array substrate is divided into multiple sub-pixel groups, where each group contains consecutive columns of sub-pixels. By segmenting the testing structure into groups and configuring switch units within each group, the patent enables balanced polarity distribution across the common electrode, resolving the voltage instability issue while maintaining testing effectiveness.
Solution Approach 2:
The patent applies different configurations to different regions of the array substrate. Specifically, switch units are selectively activated in certain sub-pixel groups during testing, and the number of switch units in each group is designed to balance the polarity quantities. This local differentiation ensures that testing signals with opposite polarities are balanced, stabilizing the common electrode voltage while enabling effective testing.
2Adaptability or versatility
If multiple switch units are used to connect data wires to testing ends, then testing flexibility is improved, but the device complexity increases
Solution Approach 1:
The switch units serve multiple functions: they connect data wires to testing ends during testing operations, and maintain normal display functionality during regular operation. By making the switch units multi-functional, the patent achieves testing flexibility without proportionally increasing device complexity, as the same components serve both testing and display purposes.
Solution Approach 2:
The patent configures a specific number of switch units in each sub-pixel group that is sufficient to achieve balanced polarity distribution for testing purposes. Rather than using switch units for every possible connection, the patent employs a partial configuration that provides adequate testing capability while avoiding unnecessary complexity from excessive switch units.
Data Source
AI summary
The present disclosure provides an array substrate, a testing method, a display panel and a display apparatus. The array substrate includes: multiple gate wires and data wires intersecting with each other to divide multiple sub-pixel regions, where the sub-pixels corresponding to each of the data wires form a column of the sub-pixels, and M neighboring columns of the sub-pixels form a sub-pixel group; multiple switch units, where a first end of each of the switch units is electrically connected to one of the data wires; and multiple testing ends, each of which is electrically connected to second ends of the switch units. In such configuration, at least two switch units are electrically connected to the data wires corresponding to ith columns of the sub-pixels in at least two alternately arranged sub-pixel groups, respectively. Accordingly, impacts to voltage of common electrodes may be avoided and testing effect may be improved.