LCD Gate Link Line Short-Circuit Prevention via Segmented Auto Probe Pads
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Solution Overview
Problem
LCD devices face frequent short-circuit issues between adjacent link lines formed in the same layer during manufacturing, particularly due to the narrow area in which these lines are formed, and existing detection methods fail to accurately identify short-circuits between odd-numbered and even-numbered gate link groups connected to the same auto probe pad.
Innovation Solution
The LCD device design includes alternately arranged gate and data link lines with insulation layers, where each link line group is connected to a specific auto probe pad, preventing short-circuits between adjacent link lines and allowing for effective detection of any generated short-circuits by connecting link lines to different auto probe pads that transmit distinct electric signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If link lines are formed in the same layer to reduce device complexity, then manufacturing is simplified, but short-circuit issues occur between adjacent link lines
Solution Approach 1:
The patent divides link lines into odd-numbered groups and even-numbered groups, with each group connected to separate auto probe pads. This segmentation prevents short-circuits between adjacent link lines by electrically isolating them through different probe pads, while maintaining the simplicity of same-layer formation.
2Area of stationary object
If multiple link lines are connected to the same auto probe pad for compact design, then device area is reduced, but detection precision for short-circuits deteriorates
Solution Approach 1:
The patent assigns separate auto probe pads to odd-numbered and even-numbered link line groups, enabling independent detection of each group. This segmentation maintains compact design while improving short-circuit detection precision, as each probe pad can independently detect issues in its associated link line group without interference from other groups.
3Device complexity
If odd-numbered and even-numbered gate link groups are connected to the same auto probe pad, then device complexity is reduced, but detection capability for short-circuits is insufficient
Solution Approach 1:
The patent separates the connection structure by assigning different auto probe pads to odd-numbered and even-numbered gate link groups. This segmentation enables independent detection of short-circuits in each group, improving detection capability while maintaining relatively simple device structure through systematic grouping.
Data Source
AI summary
An LCD device preventing a short-circuit of adjacent link lines is disclosed. The LCD device includes a pixel area in which a plurality of gate lines and a plurality of data lines crossing the plurality of gate lines at a right angle are formed, a pad area formed at a side of the pixel area, a gate pad portion and a data pad portion formed in the pad area and respectively connected to the plurality of gate lines and the plurality of data lines, first, second, third, and fourth gate link lines connected to the plurality of gate lines and the gate pad portion and alternately arranged with an insulation layer interposed between the first, second, third, and fourth gate link lines, and first and second auto probe pads electrically connected to the first, second, third, and fourth gate link lines. The first and second gate link lines are connected to the first auto probe pad and the third and fourth gate link lines are connected to the second auto probe pad.