Touch Routing Structure for Narrow-Bezel Display Apparatus
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Solution Overview
Problem
Existing display devices face challenges in minimizing the non-display area, particularly the bezel width, while maintaining reliability and functionality, especially in devices with touch sensing capabilities.
Innovation Solution
The display apparatus modifies the configuration of the touch routing lines to reduce the width of the non-display area by disposing the touch pads closer to the display area, utilizing a structure that includes touch dielectric layers and conductive electrodes, and optimizing the routing lines and pads to minimize bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the touch routing line configuration is modified to reduce the non-display area width, then the bezel width is reduced and screen-to-device ratio is enhanced, but the reliability may be degraded due to the changed configuration
Solution Approach 1:
The touch routing line is divided into multiple segments (first routing line and second routing line) that can be independently configured. The first routing line connects the touch pad to the first touch conductive electrode, while the second routing line connects the first touch conductive electrode to the second touch conductive electrode. This segmentation allows each segment to be optimized for both signal transmission and reliability, enabling the routing lines to be positioned closer to the display area while maintaining functional integrity through proper segmentation and connection points.
2Area of stationary object
If the touch pads are disposed closer to the display area, then the bezel width is minimized, but the complexity of the routing structure increases
Solution Approach 1:
The routing structure utilizes multi-dimensional positioning by introducing multiple touch conductive electrodes (first and second touch conductive electrodes) at different locations. The first routing line extends from the touch pad in one direction to the first touch conductive electrode, while the second routing line extends from the first touch conductive electrode in another direction to the second touch conductive electrode. This multi-dimensional arrangement allows the routing lines to be positioned closer to the display area while distributing the routing path across multiple dimensions, thereby reducing bezel width without excessively increasing structural complexity.
Data Source
AI summary
A display apparatus may include a display area and a non-display area with a cutting surface, a light emitting diode, an encapsulation structure in the display area and a part of the non-display area, a touch structure on the encapsulation structure and comprising first and second touch dielectric layers and first and second electrodes, a routing line formed of a same layer and same material as the second touch electrode, and a second touch pad disposed on a first touch pad and formed of a same layer and same material as the routing line and the second touch electrode. The first touch pad may be formed of a same layer and same material as the source or drain electrode of a transistor. The second touch pad may be connected to the first touch pad via an opening in the at least one of the first and second touch dielectric layers.