Touch Screen Dummy Pattern Reduces Contact Visibility
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Solution Overview
Problem
Conventional touch screen panels face challenges in minimizing the visibility of outer wirings in the non-active region, which can lead to increased dead space and a concavo-convex shape, affecting the aesthetic appeal and functionality.
Innovation Solution
Incorporating dummy patterns between adjacent contact units and outer wirings, which are formed from low resistance materials, to reduce the visibility of the contact units and allow for a narrower bezel, while maintaining effective touch detection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If outer wirings are disposed in the non-active region to transmit electrical signals, then electrical signal transmission is achieved, but the visibility of outer wirings increases causing dead space and concavo-convex shape
Solution Approach 1:
The patent introduces a dummy pattern as an intermediary element positioned between the outer wiring and the active region. This dummy pattern acts as a visual mediator that conceals the outer wiring from view, preventing the concavo-convex shape while allowing the outer wiring to continue its electrical signal transmission function without modification
Solution Approach 2:
The dummy pattern is configured to match the visual characteristics of surrounding elements (such as the active region or non-active region background), effectively camouflaging the outer wiring through visual blending. This approach maintains the electrical functionality while eliminating the aesthetic defect of visible outer wirings
2Reliability
If outer wirings are disposed in the non-active region, then electrical signal transmission is achieved, but dead space increases reducing effective display area
Solution Approach 1:
The dummy pattern serves as a space-efficient intermediary that occupies minimal area while effectively masking the outer wiring. By positioning the dummy pattern strategically between the outer wiring and active region, the patent reduces the visual impact and perceived dead space without compromising electrical signal transmission
Solution Approach 2:
The patent addresses the dead space issue by transitioning from a two-dimensional layout problem to a multi-layered structure where the dummy pattern is positioned in a different spatial layer or plane, effectively utilizing the third dimension to conceal the outer wiring without increasing the footprint in the active display area
3Reliability
If contact units connect sensing electrodes to outer wirings, then electrical connection is achieved, but visibility of contact units increases affecting aesthetics
Solution Approach 1:
The dummy pattern is positioned to act as a visual intermediary that conceals the contact units from view. By strategically placing the dummy pattern between the contact units and the active region, the patent masks the visible presence of contact units while maintaining their essential electrical connection function
Solution Approach 2:
The dummy pattern is designed to match the visual characteristics of adjacent regions, creating a camouflaging effect that hides the contact units. This visual blending technique maintains aesthetic appeal while preserving the electrical connection functionality of the contact units
Data Source
AI summary
A touch screen panel includes a substrate, sensing electrodes, outer wirings, contact units, and at least one dummy pattern. The substrate includes an active region and a non-active region, the non-active region disposed outside the active region. The sensing electrodes are disposed in the active region. The outer wirings are disposed in the non-active region. Each of the outer wirings is connected to a respective group of the sensing electrodes. The contact units connect the respective groups of sensing electrodes to the outer wirings. The at least one dummy pattern is disposed between adjacent contact units of the contact units.