# US 10,224,015 B2 · Stringless bowed musical instrument > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,224,015 B2 - Document ID: US10224015B2 - Status: Granted - Kind: B2 - Application number: 15/289,081 - Filed: 2016-10-07 - Published: 2017-04-13 - Granted: 2019-03-05 - Earliest claimed: 2015-10-09 - Applicants: Jeffrey James Hsu - Inventors: Jeffrey James Hsu - Web page: https://patentgrep.com/patent/US10224015B2 ## CPC - G10H 1/342: {for guitar-like instruments with or without strings and with a neck on which switches or string-fret contacts are used to detect the notes being played (electric guitars in which the tones are generated by the vibration of strings G10H3/18)} - G10H 1/0016: {Means for indicating which keys, frets or strings are to be actuated, e.g. using lights or leds} - G10H 3/125: {Extracting or recognising the pitch or fundamental frequency of the picked up signal} - G10H 3/143: {characterised by the use of a piezoelectric or magneto-strictive transducer} - G10H 2220/021: Indicator, i.e. non-screen output user interfacing, e.g. visual or tactile instrument status or guidance information using lights, LEDs or seven segments displays - G10H 2220/096: using a touch screen - G10H 2220/241: on touchscreens, i.e. keys, frets, strings, tablature or staff displayed on a touchscreen display for note input purposes - G10H 2220/311: with controlled tactile or haptic feedback effect; output interfaces therefor - G10H 2220/365: Bow control in general, i.e. sensors or transducers on a bow; Input interface or controlling process for emulating a bow, bowing action or generating bowing parameters, e.g. for appropriately controlling a specialised sound synthesiser - G10H 2220/411: Light beams - G10H 2230/075: Spint stringed, i.e. mimicking stringed instrument features, electrophonic aspects of acoustic stringed musical instruments without keyboard; MIDI-like control therefor - G10H: ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE ## Abstract A stringless electric bowed musical instrument is disclosed in which sensors are provided to detect finger positions and bowing motions of the player. A touch-sensitive fingerboard surface is equipped with pitch sensors that detect finger positions. Use of a fingerboard surface that includes an interactive flexible touch screen display provides a plurality of illumination patterns to be displayed on the fingerboard and permits various operational modes that are useful for both students and artists. A bowing platform in contact with either the fingerboard or the body of the instrument provides an adjustable bowing surface for including bow sensors configured to detect vibrations in response to bow motion. The bow sensors may include piezo-ceramic elements. Optical pitch sensors may sense interruption of one or more laser beams that propagate above a top surface of the fingerboard. ## Claims ### Claim 1 A musical instrument, comprising: a body; a neck attached to the body; a fingerboard attached to the neck, the fingerboard including a touch sensitive layer configured to detect finger positions and finger pressure; a bowing platform in contact with either the fingerboard or the body, the bowing platform having an adjustable bowing surface for placement of a bow, the bowing platform including bow sensors configured to detect vibrations of the bowing surface in response to motion and pressure of the bow; and a microprocessor programmed to generate an output signal based on the detected finger positions and finger pressure and the detected vibrations of the bowing surface, wherein the output signal corresponds to a sound. ### Claim 2 (depends on 1) The musical instrument of claim 1, wherein the touch sensitive layer comprises a touch sensitive display, further comprising: a power supply; electronic components configured to drive the touch sensitive display; and a computer-readable memory, the memory storing instructions that cause the microprocessor to output selected illumination patterns on the touch sensitive display. ### Claim 3 (depends on 2) The musical instrument of claim 2, wherein the touch sensitive display is interactive and the instructions implement a plurality of selectable operational modes of the interactive touch sensitive display. ### Claim 4 (depends on 3) The musical instrument of claim 3 wherein the operational modes include one or more of a performance mode, a control panel mode, a recording mode, a playback mode, a play along mode, an exercise mode, a game mode, and a silent mode. ### Claim 5 (depends on 3) The musical instrument of claim 3, wherein the plurality of operational modes is selectable based on user input from a mobile device. ### Claim 6 (depends on 4) The musical instrument of claim 4 wherein one or more of the operational modes is programmed to cause different illumination patterns to be displayed on the interactive touch sensitive display based on a user selection. ### Claim 7 (depends on 4) The musical instrument of claim 4 wherein one or more of the operational modes is programmed to cause vibration of the fingerboard in response to touch data sensed by finger position sensors of the fingerboard, the touch data including a touch location and a touch pressure. ### Claim 8 (depends on 1) The musical instrument of claim 1 wherein the touch sensitive layer is flexible and conforms to the shape of a bowed instrument fingerboard. ### Claim 9 (depends on 1) The musical instrument of claim 1 wherein the fingerboard includes one or more layers of fiberglass, metal, glass, ceramic, crystalline, rubber, acrylic, or polymer materials. ### Claim 10 (depends on 1) The musical instrument of claim 1, wherein the fingerboard comprises pressure sensors configured to detect the finger pressure. ### Claim 11 (depends on 1) The musical instrument of claim 1, wherein the microprocessor is programmed to transmit the output signal to speakers or an amplifier to generate the sound. ### Claim 12 (depends on 1) The musical instrument of claim 1, wherein the microprocessor is programmed to transmit the output signal to a mobile device configured to process the output signal. ### Claim 13 (depends on 1) The musical instrument of claim 1, wherein the touch sensitive layer is configured to set a pressure threshold based on user input, and wherein the microprocessor is programmed to generate the output signal based on the pressure threshold. ### Claim 14 A method, comprising: displaying an illumination pattern on a touch screen fingerboard of a stringless musical instrument; electronically sensing finger placement and finger pressure on the touch screen fingerboard; electronically sensing vibrations of one or more bowing surfaces of a bowing platform of the stringless musical instrument in response to motion and pressure of a bow contacting the bowing platform; and generating an output signal based on the sensed finger placement, the sensed finger pressure, and the sensed vibrations of the one or more bowing surface, wherein the output signal corresponds to a sound. ### Claim 15 (depends on 14) The method of claim 14, wherein the bowing platform is mounted to the fingerboard. ### Claim 16 (depends on 14) The method of claim 14, wherein the bowing platform includes a plurality of retractable tracks having adjustable spacing between tracks to control a number of the one or more bowing surfaces configured to receive the bow, further comprising: detecting a radial position of the bow based on sensor strips along the tracks of the plurality of tracks. ### Claim 17 (depends on 14) The method of claim 14 wherein the bowing platform has a concave profile. ### Claim 18 (depends on 14) The method of claim 14, wherein the electronically sensing of the vibrations comprises using a piezo-ceramic device of the bowing platform, further comprising: electronically sensing a change in the finger pressure on the fingerboard using a piezo-ceramic device integrated with the fingerboard, wherein the output signal is generated based on the change.