Non-Rectangular Display Device Wiring Layout for Signal Reliability
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Solution Overview
Problem
In display devices with non-rectangular shapes, the increased creepage distance and high wiring density near wide portions lead to narrow line widths, increasing the risk of disconnection due to excessive lead line lengths and densities.
Innovation Solution
The configuration includes a signal supply part, a substrate with a width increase section, and a display region where the signal receive part receives signals through lines on the first region, eliminating the need for direct lead lines to the signal supply part, thereby reducing wiring density and maintaining a satisfactory line width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lead lines are provided for directly connecting signal receive parts to signal supply part in non-rectangular display panels, then signal transmission is achieved, but creepage distance becomes excessively long and line width becomes excessively narrow causing disconnection
Solution Approach 1:
The patent introduces an intermediary routing path through the first region (display region) as a mediator between the signal supply part and signal receive part in the second region. Instead of direct connection, signals pass through display lines in the first region, which has sufficient line width and acceptable creepage distance, thereby avoiding the disconnection problem in the second region.
Solution Approach 2:
The patent segments the signal transmission path into two distinct regions: the first region (display region) for signal distribution and the second region (non-display region) for signal reception. This segmentation allows each region to be optimized independently, with the first region handling the longer creepage distance and the second region maintaining compact connections.
2Reliability
If lead lines are provided for directly connecting signal receive parts to signal supply part, then signal transmission is achieved, but wiring density becomes excessively high causing narrow line width and disconnection
Solution Approach 1:
The display lines in the first region serve as an intermediary that distributes signals to multiple signal receive parts in the second region. This intermediary structure reduces the wiring density in the second region by consolidating connections through the first region, thereby maintaining sufficient line width and preventing disconnection.
Solution Approach 2:
The patent utilizes the spatial dimension by routing signals through the first region (display region) before reaching the second region (non-display region). This dimensional transition allows signals to be distributed over a larger area in the first region, reducing the concentration of wiring in the second region and maintaining adequate line widths.
Data Source
AI summary
A display device includes a signal supply part, a substrate including a display region and a second region having a width increase section, a display line on the display region and through which a signal for display is transmitted, a line on the first region and through which a signal is transmitted, a signal receive part on the second region, a display lead line connected to the signal supply part and an end of the display line close to the signal supply part, a first lead line connected to the signal supply part and an end of the line close to the signal supply part, and a second lead line connected to the signal receive part and another end of the line opposite from the end of the line close to the signal supply part.