Matrix Keyboard Layout for Compact Ergonomic Data Entry
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Solution Overview
Problem
Users of portable devices face inefficiencies in data entry due to the lack of ergonomic and practical keyboard designs, with existing alternatives like speech recognition, touch sensors, and virtual keyboards being less than ideal.
Innovation Solution
A Matrix Typing System (MATS) that positions data entry keys in an ergonomic manner on handheld devices, allowing users to input data without moving their hands, using a 5×5 matrix of keys with two-key combinations and chord combinations for efficient character and command input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a full-sized keyboard is used for data entry, then keyboard functionality is complete, but device portability is reduced
Solution Approach 1:
The keyboard is divided into two separate keypads (first keypad with at least five keys, second keypad with at least five keys) that can be positioned on different surfaces of the portable device. This segmentation allows each keypad to be compact while together they provide comprehensive keyboard functionality through two-key combinations and chord combinations.
Solution Approach 2:
The patent utilizes the three-dimensional space of the portable device by placing keys on multiple surfaces (front side, back side, side surfaces). This dimensional approach allows more keys to be accessible without increasing the device's footprint, enabling full keyboard functionality in a compact form factor.
2Volume of moving object
If a compact keyboard is designed for portable devices, then device portability is maintained, but ease of operation deteriorates
Solution Approach 1:
Each key on the compact keypads is designed to serve multiple functions through combinations. Individual keys can be pressed separately or in combination with other keys to produce different characters, commands, and functions. This multi-functionality allows a small number of physical keys to provide comprehensive keyboard capabilities, maintaining data entry efficiency despite the compact size.
Solution Approach 2:
The patent incorporates actuators that provide tactile feedback to replace the mechanical sensation of traditional keyboard key presses. This substitution maintains the ease of operation by providing familiar tactile cues without requiring a full-sized mechanical keyboard structure.
3Ease of operation
If speech recognition is used for data input, then hands-free operation is enabled, but accuracy and reliability are reduced
Solution Approach 1:
The patent introduces actuators as an intermediary between the user and the data input system. These actuators provide tactile feedback that confirms key presses and guides finger placement, serving as a mediator that enhances the reliability of data input while maintaining the compact form factor. This tactile intermediary layer compensates for the lack of full mechanical keyboard feedback.
4Productivity
If traditional keyboard layout is used, then character input is efficient, but ergonomic comfort is reduced due to hand movement requirements
Solution Approach 1:
The patent positions the two keypads on different surfaces of the portable device (front, back, sides) to create localized key clusters that are easily accessible from a natural hand position. This local quality approach allows users to access different key groups by simply rotating or tilting the device rather than moving hands across large distances, maintaining typing efficiency while improving ergonomic comfort.
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
Enables efficient and comfortable data entry on portable devices by allowing fingers to naturally rest on keys, providing tactile feedback through actuators, and supporting full keyboard functionality in a compact form, suitable for various devices and applications.
Implementation Method 1
Because the fingers continually rest upon the keys, it is also possible, with the help of an actuator, to provide key data back to the fingers.
Data Source
AI summary
A data input system and method utilize a keyboard including a first keypad having at least five keys and a second keypad having at least five keys. With the at least ten keys of the first and second keypads, at least twenty-five two-key combinations including one key from each of the first and second keypads are established, where the two-key combinations each represent characters. Additionally, at least twenty chord combinations including multiple keys from the first keypad and multiple keys from the second keypad are established, where the chord combinations each represent special characters and commands. A matrix of characters may be selected, and one of the two-key combinations corresponding to a selected one of the characters in the selected matrix of characters is activated to effect input of the character; or one of the chord combinations corresponding to a selected special character or a selected command is activated to effect input of the selected special character or activation of the selected command, respectively. The activations are repeated until data entry is complete.