Foldable Digitizer Layout for Sensing Coil Crack Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic apparatuses with digitizers face challenges in maintaining reliability and folding properties, particularly due to stress and potential cracking of sensing coils during folding.
Innovation Solution
The electronic apparatus incorporates a digitizer design with a base layer and cover layers that are spaced apart in the folding area, allowing the base layer to expose, while sensing coils are insulated and covered by separate cover layers, reducing stress and preventing cracking during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the digitizer is folded, then the portability is improved, but the sensing coils are subjected to stress and may crack
Solution Approach 1:
The digitizer is divided into a folding area and non-folding areas. The folding area contains only the base layer that is configured to bend during folding, while the sensing coils are positioned in the non-folding areas and remain straight. This segmentation allows the digitizer to be folded for portability while protecting the sensing coils from stress and cracking.
Solution Approach 2:
Different regions of the digitizer are assigned different functional properties. The folding area is designed with flexible base layer only, allowing bending motion. The non-folding areas contain the sensing coils and are designed to remain rigid and flat during folding operations. This local differentiation ensures that each region performs its intended function without compromising the other.
2Reliability
If the cover layers completely cover the base layer, then the sensing coils are protected, but the folding properties are degraded
Solution Approach 1:
The cover layers are segmented such that they extend only to the boundaries of the non-folding areas and do not cover the folding area. This allows the base layer in the folding area to bend freely during folding operations while the sensing coils in the non-folding areas remain protected by the cover layers.
Solution Approach 2:
The cover layers provide protective coverage in the non-folding areas where the sensing coils are located, while intentionally leaving the folding area uncovered to maintain flexibility and folding capability. This localized protection strategy ensures both coil protection and folding functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the folding reliability and durability of the digitizer by minimizing stress on sensing coils, thereby improving the overall performance and longevity of the electronic apparatus.
Implementation Method 1
The digitizer of the electronic apparatus may include various sensing coils to be activated by an electrical signal. An area in which the sensing coils are activated reacts to a signal applied from the outside.
Data Source
AI summary
An electronic apparatus includes a display module having non-folding areas and a folding area folded along a virtual folding axis, a lower plate which is disposed on a lower portion of the display module and in which lower openings overlapping the folding area are defined, and a digitizer including a first cover layer disposed on a lower portion of the lower plate, first sensing coils, second sensing coils insulated from the first sensing coils, a second cover layer, and a base layer. Each of the first cover layer, the first sensing coils, the second sensing coils, and the second cover layer does not overlap the folding area, and the base layer is exposed by the first cover layer and the second cover layer in the folding area.