Touch Pen Pressure Sensing for Touch Screen Devices
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Solution Overview
Problem
Existing touch screen devices require separate sensors and electrodes, complicating the manufacturing process and increasing costs when integrated with display panels.
Innovation Solution
A touch screen device that uses a touch pen to transmit pressure information without a separate sensor, where the touch pen adjusts its output signal based on applied pressure, allowing for accurate touch detection and simplified structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sensors and electrodes are provided in the touch panel to recognize touch pen input and transmit pressure information, then touch detection accuracy and pressure sensing capability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The touch pen is designed to perform multiple functions: it serves as both the input tool for touch detection and as a pressure sensor. The pen contains a pressure sensing unit that detects applied pressure and generates pressure information, eliminating the need for separate pressure sensors in the touch panel. This multi-functional design resolves the contradiction by maintaining measurement precision through the pen's integrated sensor while reducing device complexity.
Solution Approach 2:
The touch pen acts as an intermediary device between the user and the touch screen system. It contains a pressure sensing unit that serves as a mediator to capture pressure information and transmit it to the controller. This intermediary approach allows accurate pressure sensing without requiring the touch panel itself to contain complex sensor structures, thus resolving the contradiction between measurement precision and device complexity.
2Measurement precision
If separate sensors and electrodes are provided in the touch panel to recognize touch pen input and transmit pressure information, then pressure sensing capability is improved, but manufacturing cost increases
Solution Approach 1:
The pressure sensing function is extracted from the touch panel structure and relocated to the touch pen itself. The pressure sensing unit is integrated into the pen, which is a separate component that can be manufactured independently. This extraction eliminates the need for complex sensor integration into the touch panel, thereby reducing manufacturing cost while maintaining pressure sensing capability.
Solution Approach 2:
The touch pen, containing the pressure sensing unit, can be manufactured as a separate, relatively simple component compared to integrating sensors into the entire touch panel. This approach allows for cost-effective production of the sensing functionality, as the pen can be produced using standard manufacturing processes for input devices, thereby reducing overall manufacturing cost while maintaining pressure sensing capability.
3Reliability
If a plurality of electrodes and sensors are provided in the touch panel, then touch input recognition is improved, but the manufacturing process becomes complicated
Solution Approach 1:
The touch pen performs self-service by containing its own pressure sensing unit that automatically detects and reports pressure information to the controller. This self-contained design eliminates the need for the touch panel to provide complex sensor infrastructure, thereby simplifying the manufacturing process while maintaining reliable touch input recognition through the pen's integrated sensing capability.
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
Enhances touch detection accuracy and linearity, reduces manufacturing complexity, and lowers costs by eliminating the need for additional sensors and electrodes.
Implementation Method 1
the touch pen adjusts the pen output signal according to pressure which is applied thereto when the touch pen contacts the touch screen
Data Source
AI summary
Disclosed is a touch screen device for transmitting pressure information based on a touch pen without a separate sensor being provided in a touch panel. The touch screen device includes a touch screen and a touch pen transmitting a pen output signal to the touch screen. The touch pen adjusts the pen output signal according to pressure which is applied thereto when the touch pen contacts the touch screen.