Touch Layer Antenna Isolation for Accurate Near-Display Gesture Sensing
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Solution Overview
Problem
Display devices face challenges in recognizing user gestures close to the device due to interference from wireless communication antennas, which affect the accuracy of touch sensors operating in a capacitive scheme.
Innovation Solution
The display device incorporates a touch layer with specific antenna patterns and sensor electrodes configurations, including dummy holes and insulating layers, to isolate antenna signals from touch detection, allowing for effective gesture recognition without overlapping with light-emitting areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication antennas are integrated into the display device, then wireless communication functionality is enabled, but touch sensor accuracy deteriorates due to signal interference
Solution Approach 1:
The touch sensor area is divided into a first touch area surrounding the antenna pattern and a second touch area not surrounding the antenna pattern. This segmentation allows different touch sensing methods to be applied in different regions, with the first touch area using a method that compensates for antenna interference while the second touch area uses conventional capacitive sensing.
Solution Approach 2:
Different touch sensing approaches are applied to different spatial regions of the touch sensor. The first touch area (surrounding the antenna) uses a specialized sensing method that is less susceptible to antenna signal interference, while the second touch area uses standard capacitive touch sensing, optimizing performance for each local region's characteristics.
2Adaptability or versatility
If antenna patterns are placed in the touch area, then wireless communication is achieved, but gesture recognition accuracy near the display deteriorates
Solution Approach 1:
The touch sensor area is segmented into regions based on their spatial relationship to the antenna pattern. The first touch area surrounding the antenna uses a sensing method that can distinguish between antenna signals and genuine touch gestures, while the second touch area uses conventional sensing, thereby maintaining gesture recognition accuracy near the display.
Solution Approach 2:
The first sensor electrodes and second sensor electrodes act as intermediaries between the antenna pattern and the touch detection system. These electrodes are configured to detect both antenna signals and touch gestures, allowing the system to differentiate between the two through signal analysis and processing.
3Area of stationary object
If sensor electrodes overlap with light-emitting areas, then touch sensing coverage is maximized, but display quality deteriorates
Solution Approach 1:
The solution moves the antenna-related touch sensing components from the display area to the non-display area. The first sensor electrodes, second sensor electrodes, and antenna pattern are all disposed in the non-display area, eliminating their interference with light emission while maintaining touch sensing functionality through the extended sensor electrode configuration.
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 configuration enables accurate gesture recognition near the display device while maintaining the functionality of wireless communication, reducing signal interference and enhancing user interaction.
Implementation Method 1
a first antenna pattern transmitting a transmit signal, and a second antenna pattern receiving the transmit signal
Implementation Method 2
when a touch sensor operates in a capacitive scheme to detect a user's touch
Data Source
AI summary
A display device is provided. The display device comprise a substrate a display layer disposed on the substrate and including a plurality of light-emitting areas, and a touch layer disposed on the display layer and including a touch area and a non-touch area, the touch layer includes: a plurality of first sensor electrodes and a plurality of second sensor electrodes disposed in the touch area, and a plurality of antenna patterns disposed in a portion of the touch area disposed adjacent to the non-touch area, the plurality of antenna patterns includes: a first antenna pattern transmitting a transmit signal, and a second antenna pattern receiving the transmit signal, wherein each of the first antenna pattern and the second antenna pattern is at least partially surrounded by one of the plurality of first sensor electrodes or one of the plurality of second sensor electrodes in a plan view.