Input Sensor Bridge Layout for Low-Reflection Display Panels
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Solution Overview
Problem
The conductive layer of input sensors in display devices affects external light reflection and visibility of specific patterns, leading to a decrease in display quality.
Innovation Solution
A display device with an input sensor comprising alternating first and second sensing units and bridge groups, including bridge patterns and dummy bridges, is designed to minimize the visibility of the conductive layer from the outside.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive layer is used in the input sensor, then electrical connectivity and sensing function are achieved, but external light reflection and visibility of specific patterns occur, leading to decreased display quality
Solution Approach 1:
The conductive layer is divided into multiple separate sensing units (first sensing units and second sensing units) that are alternately arranged. Each sensing unit consists of discrete sensing patterns connected by bridge patterns, rather than a continuous conductive layer. This segmentation reduces the area of continuous conductive material, thereby reducing external light reflection while maintaining sensing functionality through the distributed sensing units.
Solution Approach 2:
Different regions of the conductive layer are designed with different properties: the sensing patterns provide sensing functionality, while the bridge patterns provide electrical connectivity. The bridge patterns are specifically designed to be less visible and reflect less light than traditional continuous conductive layers, while still maintaining the necessary electrical properties for sensor operation.
2Reliability
If a conductive layer is used in the input sensor, then electrical connectivity is achieved, but visibility of specific patterns from the outside increases
Solution Approach 1:
The continuous conductive layer is segmented into discrete sensing units connected by bridge patterns. This segmentation allows the conductive material to be distributed in a way that reduces pattern visibility while maintaining electrical connectivity through the bridge patterns that connect adjacent sensing units.
Solution Approach 2:
The bridge patterns act as intermediaries that provide electrical connectivity between sensing units while being designed to minimize visibility. These bridge patterns serve as a mediator that maintains the electrical function while reducing the harmful visual effect of the conductive layer.
3Object-affected harmful factors
If the conductive layer is minimized to reduce visibility, then display quality improves, but sensing function and electrical connectivity may be compromised
Solution Approach 1:
By segmenting the conductive layer into multiple sensing units with bridge connections, the total area of continuous conductive material is reduced, improving display quality.同时，the segmentation allows for optimized placement of sensing patterns to maintain sensing function while using less conductive material overall.
Solution Approach 2:
The sensing units are designed to perform multiple functions: they provide sensing capability, electrical connectivity, and reduced visibility. The bridge patterns also serve multiple purposes by connecting sensing units electrically while being designed to minimize visual impact, thus serving both electrical and aesthetic functions.
Data Source
AI summary
A display device includes a display panel and an input sensor including a first sensing unit and a second sensing unit which are alternately arranged in a first direction, and a plurality of bridge groups. Each of the first sensing unit and second sensing unit includes a first sensing pattern, a second sensing pattern having a shape extending in the first direction, and a plurality of third sensing patterns spaced apart from each other in a second direction crossing the first direction with the second sensing pattern therebetween. Each of the bridge groups includes at least one first bridge pattern having a first shape extending longitudinally in the first direction and at least one second bridge pattern having a second shape extending longitudinally in the second direction.