Edge-Mounted Piezoelectric Touch Sensor Bars
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional touch panels face challenges in power consumption and complexity, making them unsuitable for ultra-small mobile devices and future wide displays, as they require additional layers and complex structures that consume excessive power and complicate manufacturing.
Innovation Solution
A touch sensor system utilizing piezoelectric material grids on a touch plate with sensor bars coupled to transversal and longitudinal surfaces, which processes vibration signals to accurately determine touch points with reduced peripherals and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional layers including transparent electrodes are mounted on the glass substrate to enable electric resistive touch panel, then touch functionality is achieved, but brightness is compromised and power consumption increases
Solution Approach 1:
The patent extracts the touch sensing function from the traditional layered electrode structure and relocates it to the edges of the display panel. By placing sensor bars only at the boundaries rather than throughout the entire surface with multiple layers, the system eliminates the brightness-compromising transparent electrodes from the display area while preserving touch functionality.
Solution Approach 2:
The patent transitions from a two-dimensional surface-based touch detection approach (using transparent electrodes across the display area) to a one-dimensional edge-based approach (using sensor bars at the boundaries). This dimensional change allows touch sensing to occur at the periphery rather than interfering with the central display area's light transmission.
2Ease of operation
If additional layers including transparent electrodes are mounted on the glass substrate to enable electric resistive touch panel, then touch functionality is achieved, but power consumption increases
Solution Approach 1:
The patent extracts the power-intensive transparent electrode layers from the display structure and replaces them with simpler edge-mounted sensor bars. This extraction eliminates the need for continuous power supply to multiple electrode layers while maintaining touch sensing capability through the simplified edge sensor architecture.
Solution Approach 2:
By moving the sensing elements from the two-dimensional display surface to the one-dimensional edges, the system reduces the total number of active components requiring power, thereby lowering overall power consumption while preserving touch functionality.
3Ease of operation
If semiconductor processing techniques are used to fabricate touch panels, then touch functionality is achieved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the complex semiconductor processing requirements from the touch panel fabrication and relocates the sensing function to simple edge-mounted bars that can be integrated using conventional display manufacturing techniques. This eliminates the need for advanced semiconductor fabrication while maintaining touch functionality.
Solution Approach 2:
The patent simplifies manufacturing by transitioning from complex multi-layer electrode fabrication across the entire substrate to simpler edge-based sensor bar integration. This dimensional simplification allows use of standard display manufacturing processes rather than requiring specialized semiconductor processing equipment and techniques.
4Measurement precision
If elastic wave transmitters and receivers are arranged periodically on the touch panel to enable elastic wave sensing, then touch location detection is achieved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the periodic arrangement of elastic wave transmitters and receivers from the touch panel structure and replaces it with simple edge-mounted sensor bars. This extraction eliminates the complex periodic pattern while maintaining touch location detection capability through the simplified edge sensor architecture.
Solution Approach 2:
The patent transitions from a two-dimensional periodic array of sensors across the touch panel surface to a one-dimensional arrangement of sensor bars at the edges. This dimensional change dramatically reduces construction complexity while preserving the ability to detect touch locations through vibration propagation.
5Measurement precision
If elastic wave transmitters and receivers are arranged periodically on the touch panel to enable elastic wave sensing, then touch location detection is achieved, but power consumption increases
Solution Approach 1:
The patent extracts the power-intensive periodic arrangement of elastic wave transmitters and receivers and replaces it with simpler edge-mounted sensor bars that consume less power. This extraction reduces the total number of active sensing elements while maintaining touch location detection capability.
Solution Approach 2:
By moving the sensing elements from a two-dimensional periodic array to a one-dimensional edge arrangement, the system reduces the total power consumption of the sensing subsystem while preserving touch location detection through the simplified edge sensor architecture.
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 system achieves accurate and fast touch point determination with a simple, cost-effective design suitable for various devices, reducing power usage and manufacturing complexity.
Implementation Method 1
a first sensor bar (11) which comprises a grid made from a piezoelectric material formed on one side surface
Data Source
AI summary
A touch sensor system using vibration at touch point is provided, which includes a first sensor bar having a piezoelectric grid formed on a side surface thereof, a second sensor unit having a piezoelectric grid formed on a side surface thereof, and connected at one end to an end of the first sensor bar in a perpendicular relation, a signal processing unit connected to the first and second sensor units to receive an electric signal, and a touch point calculating unit which calculates a location of touch with respect to a screen through which the touch is inputted, based on the electric signal received at the signal processing unit.