Touch Display Fan-Out Layout for Narrow Bezel Panels
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Solution Overview
Problem
Existing display devices have a significant bezel area that reduces the effective display area and aesthetic appeal, particularly in devices with touch sensing capabilities.
Innovation Solution
The display device incorporates a design where panel lines and sensing lines are grouped into alternating first and second line groups in the fan-out part, with partial overlap and separate layers to minimize the bezel area, allowing for efficient layout and reduced non-display space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If panel lines and sensing lines are arranged separately without grouping, then routing is simpler, but bezel area increases
Solution Approach 1:
The patent merges panel lines and sensing lines into alternating line groups in the fan-out part. Specifically, first line groups containing panel lines and second line groups containing sensing lines are alternately arranged and overlap each other in the fan-out region, reducing the overall area occupied by these lines and thereby minimizing the bezel area.
Solution Approach 2:
The patent utilizes vertical stacking in the fan-out part by arranging line groups on different layers that overlap each other. This multi-layer overlapping arrangement allows panel lines and sensing lines to share the same horizontal space through vertical separation, effectively reducing the horizontal footprint and bezel area.
2Area of stationary object
If line groups are overlapped in fan-out part, then bezel area is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the line groups into distinct first and second line groups that are alternately arranged. Each line group is further divided into multiple lines (panel lines or sensing lines) that are systematically organized. This segmentation allows for precise control and alignment of each subgroup, managing the complexity of manufacturing precision requirements.
3Area of stationary object
If bezel area is reduced through compact layout, then display area is enhanced, but signal interference may increase
Solution Approach 1:
The patent introduces insulating films as intermediary layers between the first and second line groups. These insulating films are formed between overlapping line groups in the fan-out part, providing electrical isolation that prevents signal interference while allowing the lines to maintain their compact overlapping arrangement for minimized bezel area.
Data Source
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AI summary
A display device includes: a display panel including a plurality of pixels and a plurality of panel lines connected to the pixels; a plurality of sensing electrodes on the display panel; a plurality of sensing lines connected to the sensing electrodes on the display panel; and a plurality of pads connected to the panel lines and the sensing lines, wherein, at a fan-out part between the pixels and the pads, the panel lines are grouped into a plurality of first line groups, the sensing lines are grouped into a plurality of second line groups, and the first line groups and the second line groups are alternately arranged.