Writing Input Apparatus Tilt Angle Compensation

Solution Overview

Problem

The existing writing input apparatuses using touch panels face unintentional differences in writing pressure due to variations in user posture when the device is used in horizontal or vertical placement, leading to inconsistent input control.

Innovation Solution

A writing input device equipped with a touch panel, an input detector, a touch-pressure detector, a tilt angle detector, and an input characteristic determination device that adjusts the input characteristic based on detected touch pressure and tilt angle to maintain consistent writing pressure across different postures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the touch panel is used in horizontal placement, then the user can write with pen tip pointing down, but the user unintentionally inputs writing with strong writing pressure

Engineering Contradiction:

Improvewriting postureVSAvoidwriting pressure

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The patent changes the parameter of writing pressure detection by introducing tilt angle as an additional variable. The control device adjusts the writing pressure value based on the detected tilt angle, transforming a single-parameter detection into a multi-parameter system that accounts for device orientation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback by detecting the actual tilt angle of the device and using this information to adjust the writing pressure interpretation. The control device continuously monitors tilt angle and modifies the writing pressure value accordingly, creating a closed-loop system that compensates for orientation-induced pressure variations.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the touch panel is used in vertical placement, then the user can write with pen supported by arm, but the user writes in unstable state and unintentionally inputs writing with weak writing pressure

Engineering Contradiction:

Improvewriting postureVSAvoidwriting pressure

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The patent changes the parameter of writing pressure detection by introducing tilt angle as an additional variable. The control device adjusts the writing pressure value based on the detected tilt angle, transforming a single-parameter detection into a multi-parameter system that accounts for device orientation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback by detecting the actual tilt angle of the device and using this information to adjust the writing pressure interpretation. The control device continuously monitors tilt angle and modifies the writing pressure value accordingly, creating a closed-loop system that compensates for orientation-induced pressure variations.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If the same input control is executed in horizontal and vertical placement, then the system maintains consistent control logic, but the detected writing pressure values differ due to posture differences

Engineering Contradiction:

Improveplacement flexibilityVSAvoidwriting pressure detection

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent changes the parameter of writing pressure detection by introducing tilt angle as an additional variable. The control device adjusts the writing pressure value based on the detected tilt angle, transforming a single-parameter detection into a multi-parameter system that accounts for device orientation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback by detecting the actual tilt angle of the device and using this information to adjust the writing pressure interpretation. The control device continuously monitors tilt angle and modifies the writing pressure value accordingly, creating a closed-loop system that compensates for orientation-induced pressure variations.

Inventive Principle:

Principle #23Feedback

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

Prevents unintentional writing pressure differences by determining and adjusting the input characteristic according to the detected tilt angle, ensuring consistent writing pressure and intended input intensity in both horizontal and vertical placements.

Implementation Method 1

a tilt angle detector that detects a tilt angle with a horizontally placed state of the touch panel input device being a reference

Methodology Applied

Scientific EffectTilt angle detection:

Implementation Method 2

a touch-pressure detector that detects a touch pressure as a pressing force applied to the touch panel input device and corresponding to the touch input detected by the input detector

Methodology Applied

Scientific EffectPressure detection:

Data Source

PatentUS10901537B2Writing input apparatus

Publication Date: 2021.01.26 SHARP KK

AI summary

The writing input apparatus includes a touch panel input device, an input detector that detects touch input to the touch panel input device, a touch-pressure detector that detects a touch pressure applied to the touch panel input device and corresponding to the touch input detected by the input detector, a tilt angle detector that detects a tilt angle with a horizontally placed state of the touch panel input device being a reference, and an input characteristic determination device that determines an input characteristic corresponding to the touch input on the basis of the touch pressure detected by the touch-pressure detector and the tilt angle detected by the tilt angle detector.