Camera Unit Touch Pressure Sensing via Color Analysis
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Solution Overview
Problem
Traditional touch screens require additional devices to sense touch pressure, limiting their ability to detect pressure variations accurately and efficiently, especially in varying environmental conditions.
Innovation Solution
A method utilizing a digital device's camera unit and illumination sensor to sense touch pressure by analyzing image data and illumination values, allowing for precise detection without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional touch screens are used without additional devices, then device complexity is reduced, but touch pressure sensing capability is lost
Solution Approach 1:
The camera unit, originally designed for capturing images, is repurposed to detect touch pressure by analyzing color information changes. This multi-functional use eliminates the need for dedicated pressure sensing hardware, reducing device complexity while maintaining measurement capability
Solution Approach 2:
Instead of using direct physical pressure sensors, the system creates an optical copy of the touch interaction through the camera unit. The camera captures color changes caused by pressure, converting mechanical pressure information into optical data that can be analyzed to determine pressure levels
2Measurement precision
If additional pressure-sensing devices are added to touch screens, then touch pressure measurement precision is improved, but device complexity increases
Solution Approach 1:
The camera unit serves dual purposes: its primary function for image capture and its secondary function for touch pressure detection. By making the existing camera multi-functional, the patent avoids adding dedicated pressure sensing hardware, thus maintaining measurement precision without increasing device complexity
Solution Approach 2:
The camera unit and illumination sensor serve themselves by detecting natural color changes in the display caused by touch pressure. The system uses the display's own optical properties and the camera's existing capabilities to sense pressure, eliminating the need for separate sensing mechanisms
3Device complexity
If touch pressure is sensed using existing devices like camera units, then device complexity is reduced, but measurement precision in varying environments deteriorates
Solution Approach 1:
The illumination sensor provides real-time feedback about environmental lighting conditions, which the processor uses to adjust and compensate for variations in color information. This feedback mechanism enables the system to maintain accurate touch pressure measurement across different environmental conditions without adding complex hardware
Solution Approach 2:
The system dynamically adjusts measurement parameters based on environmental conditions detected by the illumination sensor. By changing how color information is interpreted and processed according to lighting conditions, the patent maintains measurement precision while using simple existing hardware
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
Enables the digital device to accurately sense touch pressure in various environments without additional devices, providing a cost-effective and efficient means to detect pressure levels, which can be used to control device operations.
Implementation Method 1
obtaining image data sensed by a camera unit of a digital device
Implementation Method 2
obtaining illumination value sensed by a illumination sensor of the digital device
Data Source
AI summary
The present invention relates to a method for sensing touch pressure on a digital device by using image data sensed by a camera unit.To achieve these objects and other advantages, the present invention provides the method for sensing touch pressure and a digital device using the same, wherein the method comprises obtaining image data sensed by a camera unit of the digital device; obtaining illumination value sensed by a illumination sensor of the digital device; extracting color information of the image data; determining whether a touch input has been performed on the camera unit; and sensing the touch pressure of the touch input based on the extracted color information and the obtained illumination value, if it is determined that the touch input has been performed in the determining step.