Segmented Display Shielding Pattern for Charging Efficiency
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Solution Overview
Problem
Magnetic fields generated by shielding electrodes can decrease the charging efficiency of charging electrodes in display devices, and interference with pixel driving occurs due to the presence of these electrodes.
Innovation Solution
A display device with a shielding pattern having a specific thickness and slits is designed to minimize interference, allowing for efficient charging while maintaining pixel functionality. The shielding pattern is configured to satisfy the relation T1≤(πBC)1/2, where T1 is the thickness, B is permeability, and C is the frequency of the electric current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding electrode is used to block magnetic fields, then magnetic field shielding is improved, but charging efficiency of the charging electrode decreases
Solution Approach 1:
The shielding electrode is divided into multiple segments with slits, creating a grid-like structure that allows magnetic field shielding while permitting charging magnetic fields to pass through the gaps between segments
Solution Approach 2:
Different regions of the shielding electrode are designed with different properties - the slits create local openings that allow charging efficiency while the remaining shielded regions maintain magnetic field blocking capability
2Object-affected harmful factors
If a shielding electrode is used to block magnetic fields, then magnetic field shielding is improved, but interference with pixel driving occurs
Solution Approach 1:
The shielding electrode is segmented into multiple sections separated by slits, which reduces the continuous conductive path that would otherwise generate harmful eddy currents interfering with pixel operation
Solution Approach 2:
The thickness of the shielding electrode is optimized to satisfy T1≤(D/ABC)1/2, where this specific thickness parameter allows the shielding function while minimizing interference with pixel driving through controlled eddy current generation
3Object-affected harmful factors
If the thickness of the shielding electrode is increased to improve shielding, then magnetic field shielding is improved, but charging efficiency decreases
Solution Approach 1:
The thickness parameter T1 is precisely controlled to satisfy the relation T1≤(D/ABC)1/2, which represents an optimized parameter range that provides sufficient magnetic field shielding while allowing charging magnetic fields to penetrate effectively
Solution Approach 2:
The shielding electrode is divided into segments with slits, which allows a thicker overall structure to provide better shielding while the slits prevent the formation of large eddy current loops that would block charging fields
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
The solution effectively prevents the reduction in charging efficiency and interference, ensuring optimal performance of both charging and pixel driving operations.
Implementation Method 1
a first shielding pattern disposed on the base layer and overlapping the display region, the first shielding pattern having a first thickness and having at least one slit dividing the first shielding pattern into a plurality of sections
Implementation Method 2
an input sensor disposed on the display panel, the input sensor including a sensing electrode configured to sense an electromagnetically induced current
Data Source
AI summary
The present application relates to a display device and an electronic device including the same. The display device includes a display panel including a display region and a non-display region, and an input sensor disposed on the display panel. The display panel includes a base layer including resin layers, pixels disposed on the base layer and overlapping the display region, a charging electrode disposed under at least one resin layer and overlapping the display region, and a first shielding pattern disposed on the base layer and overlapping the display region, the first shielding pattern having a first thickness and having at least one slit dividing the first shielding pattern into sections. The first thickness corresponds to a thickness satisfying a relation of the following equation:T1≤(DABC)1/2,where T1 represents the first thickness, A is π, B is permeability of the first shielding pattern, C is frequency of electric current flowing through the first shielding pattern, and D is resistivity of the first shielding pattern.