Display Pad Arrangement for Gap Control
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Solution Overview
Problem
As display devices with increasing resolution require more pads, the gap between pads and films decreases, potentially leading to short-circuits and increasing manufacturing costs.
Innovation Solution
The display device incorporates a dualized pad portion arrangement with control pads positioned on one side and data pads in two rows, utilizing overlapping printed circuit films to secure gaps and prevent short-circuits while maintaining a cost-effective process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pads is increased to achieve higher resolution, then the display resolution is improved, but the gap between pads decreases leading to potential short-circuits
Solution Approach 1:
The pad portions are arranged in multiple rows (first row and second row) along the gate line direction, transitioning from a single-row linear arrangement to a multi-row spatial configuration. This dimensional change allows pads to be distributed more efficiently, maintaining adequate gaps between adjacent pads while accommodating the increased number of pads required for higher resolution displays.
Solution Approach 2:
The pad portions are divided into multiple control pad portions (first control pad portion, second control pad portion, etc.) that are separately controlled by different control signal lines. This segmentation allows independent routing and spacing control for different pad groups, enabling maintenance of sufficient gaps between pads while supporting the increased pad count for high resolution.
2Measurement precision
If the number of pads is increased to achieve higher resolution, then the display resolution is improved, but the gap between films decreases
Solution Approach 1:
Multiple film portions (first film portion, second film portion, third film portion, fourth film portion) are arranged in a multi-row configuration corresponding to the multi-row pad arrangement. This spatial distribution across multiple rows maintains adequate spacing between adjacent films, preventing manufacturing difficulties while supporting the increased pad density required for higher resolution displays.
3Reliability
If pads are arranged in multiple rows to maintain gaps, then the reliability is improved, but the process cost increases
Solution Approach 1:
Multiple film portions are configured to overlap with multiple pad portions in a systematic multi-row arrangement. This universal configuration pattern can be applied consistently across the display panel, allowing standardization of the manufacturing process. The regular, repeating structure of multiple rows reduces manufacturing complexity and cost compared to irregular arrangements, while maintaining the necessary gaps for reliability.
Data Source
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AI summary
A display device includes a display panel including a display area and a peripheral area; a data pad portion transferring a data voltage; and a control pad portion transferring a control voltage, the data pad portion includes: a first data pad portion (510) in a first row of the first pad portion (PD1), a second data pad portion (520) in a second row of the first pad portion (PD1); a third data pad portion (530) in a first row of a second pad portion (PD2); and a fourth data pad portion (540) in a second row of the second pad portion (PD2), and the control pad portion includes: a first control pad portion (410) at a left side of the second data pad portion (520) in the second row of the first pad portion (PD1); and a second control pad portion (420) at a right side of the fourth data pad portion (540) in the second row of the second pad portion (PD2).