Dual Cursor Input for Portable Terminal Character Entry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing portable terminals face challenges in stable character entry operations due to the need to hold the device with one hand and perform entry with the other, often resulting in errors, especially with touch panel functions where fingers inadvertently touch adjacent keys.
Innovation Solution
A portable terminal design featuring two cursors on a character entry screen with dedicated indicating means, allowing users to hold the device stably with both hands and operate the cursors using thumbs or index fingers, enabling accurate and quick character entry by moving the cursors over the entire screen and selecting keys or functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If character entry is performed by holding the mobile telephone with one hand and operating character entry buttons with the other hand, then the device can be operated, but stable holding and quick entry operation cannot be achieved simultaneously
Solution Approach 1:
The device is divided into two independent operating systems: a touch panel for one-hand device control and a physical keyboard for the other hand's character entry. This segmentation allows each hand to operate independently without interfering with device stability, resolving the contradiction between ease of operation and holding stability.
Solution Approach 2:
A physical keyboard serves as an intermediary input device between the user and the device. Instead of requiring direct touch input from the hand that should be stabilizing the device, the physical keyboard provides a separate input channel that can be operated by the other hand without compromising holding stability.
2Ease of operation
If touch panel function is used for character entry, then entry can be performed, but finger inadvertently touches adjacent keys causing errors
Solution Approach 1:
The input function is segmented into two separate systems: touch panel for device control and physical keyboard for character entry. The physical keyboard provides tactile feedback and distinct key boundaries that prevent inadvertent adjacent key touches, thereby improving key selection accuracy while maintaining ease of operation.
Solution Approach 2:
The physical keyboard keys are designed with visual distinctions (different colors, shapes, or patterns for different key types) that help users accurately identify and select the intended key, reducing errors from inadvertent adjacent key touches.
3Productivity
If two cursors are displayed and controlled independently over the entire screen, then accurate and quick entry operation is enabled, but device complexity increases
Solution Approach 1:
The physical keyboard serves multiple functions: it controls both cursors independently, provides tactile feedback for accurate key selection, and maintains a relatively simple hardware structure. This multi-functionality allows the system to achieve high productivity through dual-cursor operation without proportionally increasing device complexity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A portable terminal that can be held stably and can perform entry operation quickly at the time of character entry is provided. On a character entry screen including a keyboard screen, a first cursor and a second cursor are displayed. A first indicating button 20 for indicating the direction of movement of the first cursor and giving an instruction to select a key currently indicated by the first cursor on the keyboard screen and a second indicating button 30 for indicating the direction of movement of the second cursor and giving an instruction to select a key currently indicated by the second cursor on the keyboard screen are provided at the lower edge on the front side of the portable terminal. A control means of the portable terminal controls the entry of a character based on a signal from the first indicating button 20 and a signal from the second indicating button 30.