Force Touch Controller Using Reference Pressure Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional force touch methods, such as the peek and pop function in smartphones, require complex calibration processes due to varying force-pressure values across the display, limiting the number of controllable operations and increasing calibration time.
Innovation Solution
A force touch method that detects pressure magnitude and controls multiple 3D touch functions using a single predetermined reference pressure, allowing for different functions to be performed based on the number of pressure increases and time points, reducing the need for multiple calibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple reference pressures are used to enable multiple 3D touch functions, then the number of controllable operations is improved, but the calibration complexity and time are increased
Solution Approach 1:
The patent segments the pressure detection process by using multiple thresholds (first reference pressure and second reference pressure) to distinguish between different 3D touch functions. This allows the system to identify multiple functions (peek function and pop function) through sequential pressure threshold comparisons, enabling versatile control without requiring complex calibration for each function individually.
Solution Approach 2:
The patent applies preliminary action by pre-establishing multiple reference pressure values before actual touch operations. The controller is pre-configured with these pressure thresholds, allowing it to automatically determine which 3D touch function should be executed based on the detected pressure magnitude without requiring real-time calibration or complex processing during user interaction.
2Adaptability or versatility
If multiple reference pressures are used to enable multiple 3D touch functions, then the number of controllable operations is improved, but the calibration process complexity is increased
Solution Approach 1:
The patent divides the pressure detection range into segments defined by multiple reference pressures. The first reference pressure threshold separates normal touch from the peek function, while the second reference pressure threshold distinguishes the pop function. This segmentation allows each function to be calibrated independently and simplifies the overall calibration process compared to using a single comprehensive calibration for all functions.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the pressure threshold values to define different 3D touch functions. Instead of calibrating a single complex pressure-response curve, the system uses discrete parameter changes (threshold values) that can be independently set and calibrated, reducing the complexity of the calibration process while enabling multiple functions.
3Measurement precision
If force-pressure values vary across the display, then accurate force detection is improved, but the calibration time increases
Solution Approach 1:
The patent addresses local quality variations by allowing different regions of the display to have different force-pressure characteristics without requiring uniform calibration across the entire surface. The system detects pressure magnitude at the touch location and compares it against reference thresholds, enabling accurate force detection in each local region while avoiding the time-consuming task of calibrating every possible location individually.
Solution Approach 2:
The patent replaces complex mechanical calibration procedures with an electronic threshold-comparison approach. Instead of physically calibrating force sensors at multiple locations, the system uses software-based pressure threshold comparisons to determine 3D touch functions, significantly reducing calibration time while maintaining measurement precision through the use of multiple reference pressure values.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a force touch method of a touch input device and more particularly to a method for providing different functions in accordance with the force touch input to the touch input device. The force touch method of the touch input device including a touch input unit and a controller in accordance with an embodiment of the present invention includes: a detecting step in which the controller detects a magnitude of a pressure of an object, which is input to the touch input unit; a first 3D touch function control step in which when the detected magnitude of the pressure increases from below a magnitude of a predetermined reference pressure to above the magnitude of the reference pressure, the controller controls such that the first predetermined 3D touch function is performed in the touch input device; and an N-th 3D touch function control step in which, while the object is not released from the touch input unit, when the number for which the detected magnitude of the pressure increases from below the magnitude of the reference pressure to above the magnitude of the reference pressure is N (here, N is a natural number greater than 1), the controller controls such that the N-th 3D touch function different from the first 3D touch function is performed in the touch input device.