Stylus Input Mode Switching in Portable Terminals

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Solution Overview

Problem

Existing portable terminals require users to select a mode for using a stylus pen for character input, which is inconvenient and only possible with specific software applications, limiting functionality without additional applications.

Innovation Solution

A portable terminal with a touch sensor and controller that automatically changes input modes based on detected character inputs, allowing direct character input using a stylus pen without selecting a mode or using additional applications, by executing a connection application and determining the current state of the terminal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a mode selection function is provided for stylus pen input, then character input capability is enabled, but device complexity and ease of operation deteriorate due to requiring mode selection and additional applications

Engineering Contradiction:

Improveease of character inputVSAvoidcomplexity of input mode management

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The portable terminal automatically detects character input from the touch sensor and autonomously switches to the appropriate input mode without requiring user intervention for mode selection. The system serves itself by monitoring touch patterns and executing mode transitions based on detected input characteristics, eliminating the need for manual mode switching while maintaining input functionality

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The terminal pre-configures multiple input modes (first input mode for keyboard screen, second input mode for direct character input) and prepares them in advance. When character input is detected, the system has the appropriate mode ready to switch to immediately, avoiding the need for complex real-time mode negotiation or additional application launches

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If additional applications are required for stylus pen input, then character input functionality is achieved, but ease of operation worsens due to requiring application selection and execution

Engineering Contradiction:

Improveversatility of input methodsVSAvoidease of character input

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The touch sensor is designed to handle multiple input types (first input mode and second input mode) through a single interface. The sensor can detect both keyboard selections and direct character writing without requiring separate hardware or application layers, making the input system universal and eliminating the need for additional applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the functionality of multiple input modes into a single touch sensor interface. By combining the first input mode (keyboard screen input) and second input mode (direct character input) under one unified detection mechanism, the system eliminates the need for separate applications while maintaining versatility of input methods

Inventive Principle:

Principle #5Merging (Combining)

3Ease of operation

If automatic mode switching is implemented, then ease of operation improves, but device complexity increases due to requiring state detection and mode management logic

Engineering Contradiction:

Improveease of character inputVSAvoidcomplexity of mode switching logic

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The controller continuously monitors touch sensor output and uses feedback from detected touch patterns to determine when to switch input modes. By implementing a feedback mechanism that watches for character input patterns and automatically triggers mode transitions, the system achieves automatic adaptation without complex user interface management

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent replaces manual mode switching (mechanical/user-driven) with automatic detection and switching (sensor-driven). The touch sensor electronically detects input patterns and the controller automatically transitions between modes based on this detection, substituting the mechanical act of mode selection with an electronic sensing and response system

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS9141282B2Apparatus and method for changing input mode in portable terminal

Publication Date: 2015.09.22 SAMSUNG ELECTRONICS CO LTD

AI summary

Provided are an apparatus and method for changing an input mode of a portable terminal according to the current state of the portable terminal during a character input operation using an input tool such as a stylus pen. The apparatus includes a touch sensor for detecting an input and a controller for controlling the touch sensor to receive the input from the touch sensor and changing the input mode if the input is a character input.