Touch Display Line Layout for Narrow Bezel Isolation
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Solution Overview
Problem
Existing display devices face challenges in reducing the bezel area due to insufficient space for display link lines and touch lines, leading to electrical short circuits between signal pads.
Innovation Solution
The display device is designed with a non-active area that includes a minimum of M touch lines and N display link lines, where M is less than N, with touch lines and display link lines disposed in different layers and alternating patterns to minimize bezel width and prevent short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch lines and display link lines are disposed in the bezel area, then the touchscreen can be driven, but the bezel area becomes insufficient and electrical short circuits occur between signal pads
Solution Approach 1:
The patent extends display link lines from the display area into the bezel area along the bezel edge, utilizing the lateral dimension of the bezel rather than confining all connections to the vertical depth. This dimensional extension allows display link lines to reach signal pads without compressing the horizontal bezel space, preventing electrical short circuits while maintaining adequate connection paths.
Solution Approach 2:
The patent segments the signal transmission paths by routing display link lines separately from touch lines through different spatial paths within the bezel area. Display link lines are extended along the bezel edge to dedicated signal pads, while touch lines maintain their conventional routing. This segmentation prevents interference and electrical short circuits between the two types of signal lines.
2Ease of operation
If the number of touch lines is increased for self-capacitance touchscreen, then touch sensitivity improves, but the required bezel area increases
Solution Approach 1:
The patent utilizes the bezel edge dimension to route display link lines, effectively adding a lateral dimension to the signal transmission architecture. This allows multiple touch lines to be accommodated in the display area without proportionally increasing the horizontal bezel width, as display link lines share the extended lateral path rather than competing for vertical space.
3Ease of manufacture
If the distance between signal pads is reduced to match the signal transmission film length, then manufacturing is simplified, but electrical short circuits occur between signal pads
Solution Approach 1:
The patent segments the signal pad arrangement by positioning display signal pads at the end of the extended display link lines, separate from touch signal pads. This spatial segmentation maintains adequate distance between different types of signal pads, preventing electrical short circuits while allowing the signal transmission film to be attached without excessive length waste.
Data Source
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AI summary
Disclosed is a display device having a reduced bezel area. The display device includes a plurality of touch lines electrically connected to a plurality of touch electrodes and display link lines electrically connected to a light-emitting element, the display link lines being disposed in a non-active area of a substrate, wherein a minimum of M touch lines (M being a natural number greater than 1 and less than N) is disposed with respect to a minimum of N display link lines (N being a natural number greater than 1), among the plurality of display link lines, in the non-active area. Consequently, a narrow bezel may be realized.