Touch Sensor-Antenna Pad Layout for Low-Interference Displays
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Solution Overview
Problem
Existing display devices face challenges in achieving desirable antenna gain properties and touch sensor resolution due to mutual signal interference and difficulties in integrating antenna and touch sensor components within limited size and design constraints.
Innovation Solution
A touch sensor-antenna module is designed with a substrate layer, touch sensor electrode layer, radiator, and antenna pad in a bonding region, where touch sensor pads and antenna pads form a row, with proper separation and grounding to minimize interference, and integrated circuit chips connected via a flexible printed circuit board for efficient signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If antenna and touch sensor are integrated within limited device size, then device compactness is improved, but mutual signal interference occurs causing deteriorated antenna gain and touch sensor resolution
Solution Approach 1:
The patent applies dimensional separation by stacking the antenna and touch sensor on different layers of the substrate. The antenna is positioned on a first layer while the touch sensor is positioned on a second layer, utilizing the third dimension (vertical stacking) to resolve the spatial conflict between the two components. This layering approach allows both components to coexist in a compact form factor while minimizing mutual interference through physical separation in the vertical dimension.
Solution Approach 2:
The patent introduces ground pads as intermediary elements positioned between the antenna and touch sensor components. These ground pads serve as electromagnetic shields that block signal interference between the antenna and touch sensor, acting as a mediator that allows both components to function simultaneously without degrading each other's performance.
2Ease of manufacture
If antenna and touch sensor share the same bonding region, then manufacturing process complexity is reduced, but bonding integration difficulty increases
Solution Approach 1:
The bonding region is segmented into distinct functional zones with different pad configurations. Antenna-related pads and touch sensor pads are separately defined and positioned, allowing for specialized bonding arrangements for each component type while still utilizing the same overall bonding region. This segmentation enables manageable integration complexity through organized spatial distribution.
Solution Approach 2:
The bonding region serves multiple functions by accommodating both antenna pads and touch sensor pads within the same area. The substrate's bonding region is designed to universally support both types of components, allowing a single bonding process to integrate multiple functional elements rather than requiring separate bonding regions for each component type.
Data Source
AI summary
A touch sensor-antenna module according to an embodiment of the present disclosure includes a substrate layer having an active region and a bonding region, a touch sensor electrode layer on the substrate layer, the touch sensor electrode layer including sensing electrodes disposed on the active region, traces extending from the sensing electrodes, and touch sensor pads disposed on the bonding region to be connected to terminal end portions of the traces, a radiator on the substrate layer, and an antenna pad disposed on the bonding region together with the touch sensor pads to be electrically connected to the radiator.