Display Pad Line Bending for Uniform Contact Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices experience screen distortion due to uneven contact resistances between pads and drivers, caused by varying contact areas and sizes between pad lines and terminal lines.
Innovation Solution
A flexible display device design featuring a conductive layer between pad lines and terminal lines, where pad lines and terminal lines are bent in opposite directions, ensuring symmetrical and uniform contact points with equal contact areas, utilizing an anisotropic conductive film for reliable electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pad lines and terminal lines are connected with varying contact areas, then the connection is simpler to manufacture, but screen distortion occurs due to uneven contact resistances
Solution Approach 1:
The patent applies local quality by making each pad line and its corresponding terminal line have substantially the same contact area at their contact points. This localized uniformity in contact area across different connection positions ensures consistent contact resistance throughout the display device, preventing screen distortion while maintaining manufacturing feasibility through standardized connection geometry.
2Adaptability or versatility
If pad lines and terminal lines have different lengths, then the layout is more flexible, but contact resistance varies causing screen distortion
Solution Approach 1:
The patent controls the contact area parameter by ensuring that each pad line and terminal line have substantially the same contact area at their connection points, regardless of their overall lengths. This parameter control approach allows for layout flexibility in terms of line routing and positioning while maintaining consistent contact resistance through standardized contact area dimensions.
3Device complexity
If the connection between pad and driver is not uniform, then device complexity is reduced, but signal transmission quality deteriorates causing screen distortion
Solution Approach 1:
The patent applies homogeneity by ensuring that all pad line to terminal line connections have substantially the same contact area. This uniformity creates consistent electrical characteristics across all signal transmission paths, ensuring reliable and uniform signal quality throughout the display device without requiring complex compensation circuits or structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces or prevents screen distortion by minimizing differences in contact resistance, ensuring smooth and consistent signal transmission between the pad and driver, thereby maintaining image quality across various device states and orientations.
Implementation Method 1
The conductive layer may include an anisotropic conductive film
Data Source
AI summary
A display device includes a display panel including a display area for displaying an image, and a non-display area outside of the display area and including a pad area, a pad in the pad area, and including a plurality of pad lines extending from wire lines drawn from the display area toward the non-display area, a driver including a plurality of terminal lines respectively electrically connected to the pad lines, the driver being configured to transmit a signal to, and to receive a signal from, an external board, and a conductive layer between the pad and the driver for electrically connecting the pad and the driver, wherein each of the pad lines crosses and contacts at least two points of a corresponding one of the terminal lines.