Input Sensor Layout for Reduced Bezel Area
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Solution Overview
Problem
Existing display devices have a significant bezel area that reduces the surface area available for the display panel, affecting the overall design and functionality of the device.
Innovation Solution
The display device incorporates an input sensor with a unique layout of sensing electrodes and lines, where the first sensing lines and second sensing lines are alternately arranged and cross each other in the peripheral area, reducing the bezel area by bringing the lines together in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing lines are extended into the peripheral area to maintain touch sensitivity, then touch sensitivity is improved, but the bezel area increases
Solution Approach 1:
The sensing lines are arranged in multiple layers at different heights, utilizing the vertical dimension to reduce horizontal space occupation. First sensing lines and second sensing lines are positioned at different vertical levels, allowing them to cross without physical interference while maintaining sensitivity in the peripheral area without increasing bezel width
Solution Approach 2:
Sensing lines are nested within insulating layers, with conductive layers embedded inside the insulating structure. The first and second conductive layers are nested at different vertical positions within the insulating layer, allowing compact arrangement that reduces the horizontal bezel area while maintaining sensing functionality
2Area of stationary object
If sensing lines are brought closer together to reduce bezel area, then manufacturing complexity increases
Solution Approach 1:
The sensing electrode is divided into multiple segments (first sensing lines and second sensing lines) positioned at different vertical levels. This segmentation allows each line to be independently routed and connected, simplifying the overall arrangement by reducing the need for complex lateral routing while maintaining sensing coverage
Solution Approach 2:
By utilizing the vertical dimension through multiple conductive layers at different heights, the design simplifies the horizontal routing complexity. Lines that would need to cross or weave in a single layer are instead stacked vertically, reducing manufacturing complexity despite closer horizontal spacing
Data Source
AI summary
A display device including a display panel, and an input sensor on the display panel, and in which an active area and a peripheral area and includes a first area and a second area spaced apart in a first direction, are defined, the input sensor including first sensing electrodes extending in the first direction, and arranged in a second direction crossing the first, second sensing electrodes extending in the second direction, and arranged in the first direction, first sensing lines extending in the second direction within the active area, connected to the first sensing electrodes, and partially located in the first area, respectively, second sensing lines electrically connected to the second sensing electrodes, respectively, and at least partially located in the second area, and a first guard electrode between the first sensing lines and the second sensing lines, and at a boundary between the first area and the second area.