Display Panel Touch Wiring Fan-Out Reducing Bezel Size
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Solution Overview
Problem
Current display panels with touch control functions face performance issues due to the need for small bezel-sized designs, which are compromised by the large number of signal wirings in the bezel areas, leading to occupied space in the display areas and affected touch control performances.
Innovation Solution
The display panel incorporates a touch control functional layer with signal wiring and electrode layers connected via through-holes, where at least part of the fan-out area is positioned in the display area, allowing signal wirings to extend to the bonding area through a converging section, reducing bezel size and preventing signal wirings from occupying touch control sensing block spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal wirings are disposed in the bezel area, then the bezel size increases, but the display area is reduced
Solution Approach 1:
The patent transitions the signal wiring layout from a two-dimensional planar arrangement in the bezel area to a three-dimensional fan-out structure that extends into the display area at an angle. The signal wirings are configured to extend from the touch control sensing blocks through the display area at a specific angle (e.g., 45 degrees) rather than following the bezel edge, effectively utilizing the third dimension (depth/layering) and angular orientation to reduce bezel occupation while maintaining connectivity.
2Length of stationary object
If signal wirings are disposed in the display area, then the bezel size is reduced, but the touch control sensing block space is occupied
Solution Approach 1:
The patent segments the signal wiring path into distinct sections: a first section extending from the touch control sensing block through the display area at an angle, and a second section extending from the display area to the bezel area. This segmentation allows the wiring to occupy different spatial zones at different segments, reducing concentrated occupation of touch control sensing block spaces while maintaining signal integrity.
Solution Approach 2:
The signal wirings are configured with different local characteristics in different regions. In the display area, the wirings extend at an optimized angle to minimize interference with touch control sensing blocks. In the bezel area, the wirings connect to bonding pads with appropriate spacing. This local optimization ensures that wiring placement in one region does not compromise touch control performance in another region.
3Device complexity
If the fan-out area is positioned in the bezel area, then the wiring structure is simplified, but the bezel size increases
Solution Approach 1:
The fan-out area is repositioned to extend into the display area rather than being confined to the bezel area. The signal wirings fan out at an angle (e.g., 45 degrees) from the touch control sensing blocks through the display area, utilizing the angular dimension to achieve a compact wiring structure that reduces bezel occupation while maintaining routing simplicity.
Data Source
AI summary
A display panel and a display device are provided. A touch control signal wiring layer in the display panel includes a plurality of signal wirings correspondingly connected to a plurality of touch control sensing blocks by one to one and extending to a bonding area. The present disclosure reduces a bezel size of the display panel and also prevents the signal wirings from occupying spaces of the touch control sensing blocks in a display area by disposing the touch control signal wiring layer and a touch control electrode layer in different layers and disposing at least a part of a fan-out area in the display area, thereby ensuring touch control performances.