Checkerboard MIDI Keyboard Resolving Hand Span and Fingering Complexity
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Solution Overview
Problem
Conventional musical keyboards are inefficient in terms of hand span and finger movement, making it difficult to play complex musical pieces and requiring different fingering patterns for different keys, which complicates learning and playing music.
Innovation Solution
A compact, equal interval keyboard with a three-dimensional array of push buttons arranged in a checkerboard pattern, allowing for comfortable hand span and simplified finger movement, along with a MIDI controller and tutorial software for enhanced learning and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional linear piano keyboard arrangement is used, then the chromatic scale can be played, but the hand span required is large and finger movement is complex
Solution Approach 1:
The patent transitions from a two-dimensional linear keyboard arrangement to a three-dimensional checkerboard pattern where push buttons are arranged in both rows and columns. This dimensional change allows the chromatic scale to be accessed more efficiently, with a comfortable hand span covering three octaves instead of one octave on a standard piano.
Solution Approach 2:
The keyboard is segmented into multiple rows and columns of push buttons, with each column representing a note and each row representing an octave. This segmentation allows for systematic organization of the chromatic scale and enables simplified finger movement patterns where fingers can move vertically between rows rather than laterally across the keyboard.
2Ease of operation
If a standard piano keyboard is used, then music can be played, but different fingering patterns are required for different keys making learning difficult
Solution Approach 1:
The checkerboard keyboard arrangement provides universal fingering patterns that work across all keys. Because each column represents a specific note and rows represent octaves, the same finger positioning and movement pattern can be used to play melodies in different keys, eliminating the need to learn different fingering patterns for each key signature.
Solution Approach 2:
The keyboard creates a consistent spatial representation of musical intervals where the physical distance and relationship between notes remain constant regardless of the key being played. This allows students to copy the same finger movements and hand positions for playing music in different keys, significantly reducing learning time.
3Area of stationary object
If push buttons are arranged in a two-dimensional array, then compactness is achieved, but hand movement becomes laterally complex
Solution Approach 1:
The patent adds a third dimension by arranging push buttons in a three-dimensional checkerboard pattern with varying heights. This vertical dimension allows fingers to move primarily in the vertical direction between rows rather than laterally across the keyboard, simplifying finger movement while maintaining compactness.
Solution Approach 2:
Different rows of push buttons are positioned at different heights, creating local variations in the keyboard surface. This local quality differentiation guides finger movement vertically between rows while maintaining horizontal alignment, making the transition between octaves more natural and less laterally complex.
4Ease of operation
If a compact keyboard design is used, then hand span is reduced, but laterally moving the hand is restricted
Solution Approach 1:
The three-dimensional checkerboard arrangement uses vertical space to accommodate the chromatic scale, allowing the keyboard to be compact in the horizontal plane while maintaining full musical range. The vertical dimension provides the necessary separation between notes, enabling comfortable hand span without sacrificing lateral movement freedom.
Solution Approach 2:
The keyboard design allows dynamic hand positioning where the hand can naturally settle into different vertical levels when playing different octaves. This dynamic adaptation to vertical positioning maintains comfort and natural hand geometry while preserving the ability to move laterally when needed for chords and key changes.
Data Source
AI summary
A musical instrument including a housing, a keypad having a plurality of push buttons arranged in a three-dimensional array of horizontal rows and vertical columns disposed within the housing and a CPU with MIDI and USB processing coupled to the keypad to manipulate and control a sound generated with signals from the plurality of push buttons, wherein the horizontal rows of push buttons are arranged in tiers.