Display Panel Sensor Electrode Antenna for Multi-Band Wireless Integration
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Solution Overview
Problem
Display devices require multiple antennas for different frequency bands of wireless electromagnetic waves, necessitating diverse conductive patterns that are challenging to integrate efficiently.
Innovation Solution
A display panel design incorporating a conductive pattern as an antenna, integrated with sensor electrodes and lines, allowing for a single conductive pattern to function across various frequency bands, including 5G mobile communications and RFID, without additional processing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate antennas are used for different frequency bands, then wireless communication coverage is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The conductive pattern is designed to function as a multi-functional antenna system that supports multiple frequency bands (including 5G and RFID) through a single integrated structure. The pattern can operate in different modes (monopole antenna, capacitive sensor, or both simultaneously) depending on the applied voltage, eliminating the need for separate antennas for each function.
Solution Approach 2:
The invention merges the antenna function and sensor function into a single conductive pattern structure. By sharing the same physical pattern for both wireless communication and touch sensing purposes, the design reduces the number of separate components and simplifies the overall device architecture.
2Adaptability or versatility
If diverse conductive patterns are created for different antennas, then frequency band coverage is improved, but integration difficulty and manufacturing complexity increase
Solution Approach 1:
A single conductive pattern serves multiple frequency bands and functions. The pattern's geometry and voltage control enable it to resonate at different frequencies (e.g., 5G bands and RFID frequencies) and perform both antenna and sensor roles, eliminating the need for multiple separate conductive patterns.
Solution Approach 2:
The electrical characteristics of the conductive pattern are dynamically changed by applying different voltages. By controlling the voltage applied to the pattern, it can switch between operating modes (antenna mode, sensor mode, or combined mode) and support different frequency bands without physical reconfiguration.
3Reliability
If separate antenna structures are added, then wireless communication performance is improved, but display panel design flexibility and area utilization decrease
Solution Approach 1:
The antenna function is merged with the existing sensor electrode pattern in the display panel. By utilizing the same conductive structure for both sensing and wireless communication, the design maintains area efficiency and does not require additional space for separate antenna elements.
Solution Approach 2:
The conductive pattern is designed to provide multiple functions (touch sensing and wireless communication) within the same physical space. This multi-functionality allows the display panel to maintain design flexibility while achieving reliable wireless communication performance across multiple frequency bands.
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 integrated conductive pattern enables stable electromagnetic wave radiation and increased antenna area design flexibility, reducing complexity and cost by sharing materials with sensor electrodes.
Implementation Method 1
a first conductive pattern spaced apart from the sensor lines and sensor electrodes... The first conductive pattern may be an antenna
Data Source
AI summary
A display device includes a display panel including a display layer having light-emitting elements on the substrate, and a sensor electrode layer on the display layer. The sensor electrode layer includes sensor electrodes in a sensor area, sensor lines electrically connected to the sensor electrodes and a first conductive pattern spaced apart from the sensor lines and sensor electrodes. The sensor lines and the first conductive pattern are in a sensor peripheral area adjacent to the sensor area. The first conductive pattern is an antenna.