Touchscreen Pressure Estimation via Barycentric Location Derivation
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Solution Overview
Problem
Existing information processing apparatuses with touch screens cannot accurately estimate pressure values for multiple operation locations on a display screen, limiting their ability to perform processes dependent on these values.
Innovation Solution
An information processing apparatus equipped with an operation display unit, pressure detecting unit, operation type determining unit, deriving unit, and estimating unit, which selectively derives barycentric locations and estimates pressure values based on detection results from multiple pressure sensors, allowing for the estimation of pressure values at multiple operation locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If typical technique 1 is used to estimate two coordinates on display screen, then coordinate information for multiple operation locations is acquired, but pressure values for multiple operation locations cannot be acquired
Solution Approach 1:
The display screen area is divided into multiple segmentation regions, each with its own pressure sensor. This segmentation allows the system to detect pressure values at multiple discrete locations simultaneously, enabling acquisition of pressure information for multiple operation locations without requiring a continuous pressure field
Solution Approach 2:
A barycentric location estimation mechanism is introduced as an intermediary to map pressure sensor readings to operation locations. The system estimates the barycentric location of applied pressure based on sensor outputs, then uses this estimated location to retrieve corresponding pressure values from pre-stored barycentric location candidate information, enabling pressure value acquisition at estimated operation locations
2Measurement precision
If typical technique 2 is used to detect one coordinate and pressure value, then pressure value for single operation location is acquired, but pressure values for multiple operation locations cannot be acquired
Solution Approach 1:
Barycentric location candidate information is pre-calculated and stored before runtime operations. This preliminary action includes computing potential barycentric locations and their corresponding pressure values in advance, allowing the system to quickly retrieve rather than compute pressure values during actual operation, thus maintaining measurement precision while improving processing speed
Solution Approach 2:
The system creates a data structure copy of barycentric location candidate information that maps locations to pressure values. This copied data structure enables rapid lookup of pressure values based on estimated operation locations, avoiding repeated complex calculations and improving productivity while maintaining accurate pressure measurement
Data Source
AI summary
Provided is an information processing apparatus including an operation display unit for displaying a display screen and detecting an operation location on the display screen based upon a user operation on the display screen, a pressure detecting unit including a plurality of pressure sensors for detecting a pressure value according to the user operation on the operation display unit for each of the plurality of pressure sensors, an operation type determining unit for determining a type of the user operation, a deriving unit for selectively deriving a barycentric location on the display screen based upon detection results from the plurality of pressure sensors, based upon a determination result from the operation type determining unit, and an estimating unit for estimating a pressure value on the operation location, based upon a derivation result from the deriving unit and upon information of barycentric location candidates.