Display Touch Sensor Layout for Light Emission and Reflectance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conductors in display devices affect emission efficiency and reflectance, impacting visibility.
Innovation Solution
A display device with a specific arrangement of conductive patterns, including first and second sensing electrodes, bridge patterns, and dummy patterns, with defined holes and uniform distances, to improve visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conductive patterns are added to detect user touch input, then input sensing capability is improved, but emission efficiency and reflectance are worsened
Solution Approach 1:
The conductive layer is segmented into multiple isolated conductive patterns (first sensing patterns, second sensing patterns, bridge patterns, and dummy patterns) arranged in an interlaced manner. This segmentation reduces the overall conductive material coverage area while maintaining touch sensing functionality, thereby improving light emission efficiency and reflectance.
Solution Approach 2:
Different regions of the conductive layer are assigned different functions: first sensing patterns and second sensing patterns for touch detection, bridge patterns for electrical connection, and dummy patterns for parasitic capacitance compensation. This local differentiation optimizes each region's performance while minimizing overall impact on display quality.
2Extent of automation
If conductive patterns are added to detect user touch input, then input sensing capability is improved, but visibility is worsened
Solution Approach 1:
The conductive layer is divided into multiple isolated patterns with gaps between them, reducing the total area that blocks light. The interlaced arrangement of first and second sensing patterns further minimizes light obstruction while maintaining sensing coverage.
Solution Approach 2:
Dummy patterns are introduced as additional conductive elements that replicate the electrical characteristics of real sensing patterns without serving primary sensing functions. These dummy patterns compensate for parasitic capacitance effects, improving sensing accuracy without significantly increasing light blockage.
Data Source
AI summary
A display device is disclosed that includes a display panel and an input sensor including a plurality of conductive patterns. The conductive patterns include a first sensing electrode including first sensing patterns and bridge patterns, a second sensing electrode spaced apart from the first sensing electrode, and dummy patterns each overlapping the second sensing electrode and a first sensing pattern adjacent to the second sensing electrode in the first direction. Each of the bridge patterns is connected to two first sensing patterns through first contact holes. When a region, in which each of the plurality of dummy patterns overlaps each of the corresponding first sensing pattern and the second sensing electrode, is defined as an overlapping region, a dummy hole, which passes through a conductive pattern disposed on an upper part among the corresponding first sensing pattern, the second sensing electrode, and the plurality of dummy patterns, in a thickness direction, is defined in the overlapping region. Each of the bridge patterns is disposed between two dummy patterns in the second direction. Distances between the two dummy patterns and the bridge pattern, disposed between the two dummy patterns, are uniform in the second direction.