Display Device Dummy Pads Narrow Bezel Resistance
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Solution Overview
Problem
Existing display devices face limitations in achieving a narrow bezel due to resistance differences in data link lines, which restrict the reduction of the non-display region and consequently the bezel size.
Innovation Solution
The implementation of a display device with dummy output pads and signal output pads on both sides, along with dummy data pads and signal input data pads in the non-display region, and data link lines connecting signal input data pads to data lines in the display region, helps in minimizing resistance deviations and allowing for a narrower bezel by optimizing the arrangement of data link lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the width of the non-display region is reduced to achieve a narrower bezel, then the bezel size is reduced, but the resistance difference between data link lines increases causing manufacturing defects
Solution Approach 1:
The patent introduces dummy data pads and dummy output pads as asymmetric structural elements to balance the resistance distribution. By adding these dummy pads at specific positions (with different lengths and resistance values), the overall resistance difference between data link lines is reduced, allowing the non-display region width to be minimized while maintaining manufacturing precision
Solution Approach 2:
The patent modifies the resistance parameters by adding dummy pads with specific resistance values. The dummy data pads are designed with different lengths (e.g., first dummy data pad longer than second dummy data pad) to create compensatory resistance effects, thereby adjusting the overall resistance distribution to meet the 200Ω difference requirement
2Area of stationary object
If the non-display region is minimized to increase display area, then the display area ratio increases, but the data link lines cannot be properly routed causing connection issues
Solution Approach 1:
The patent utilizes the vertical dimension within the non-display region by arranging dummy pads at different positions (first dummy data pad at first position, second dummy data pad at second position). This dimensional arrangement allows proper routing of data link lines while minimizing the horizontal width of the non-display region, thereby increasing display area without compromising manufacturability
Data Source
AI summary
A display device includes a data IC including a plurality of dummy output pads, and a plurality of signal output pads that are positioned at both sides of the plurality of dummy output pads; a plurality of dummy data pads and a plurality of signal input data pads in a non-display region of an array substrate of a display panel, the plurality of dummy data pads corresponding to the plurality of dummy output pads, and the plurality of signal input data pads corresponding to the plurality of the signal output pads; and a plurality of data link lines in the non-display region, and connected between the plurality of signal input data pads and the plurality of data lines in a display region of the display panel.