# US 11,109,810 B2 · Information display device, biological signal measurement system, and computer program product

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- Number: US 11,109,810 B2
- Document ID: US11109810B2
- Status: Granted
- Kind: B2
- Application number: 16/284,015
- Filed: 2019-02-25
- Published: 2019-09-19
- Granted: 2021-09-07
- Earliest claimed: 2018-03-15
- Assignees: Ricoh Company, Ltd.
- Applicants: Hideaki Yamagata; Noriyuki Tomita
- Inventors: Hideaki Yamagata; Noriyuki Tomita
- Web page: https://patentgrep.com/patent/US11109810B2

## CPC

- A61B 5/7235: {Details of waveform analysis (detecting specific parameters of the electrocardiograph cycle A61B5/349)}
- A61B 5/245: specially adapted for magnetoencephalographic [MEG] signals
- A61B 5/372: Analysis of electroencephalograms
- A61B 5/384: Recording apparatus or displays specially adapted therefor
- A61B 5/7425: {Displaying combinations of multiple images regardless of image source, e.g. displaying a reference anatomical image with a live image}
- G06F 17/142: {Fast Fourier transforms, e.g. using a Cooley-Tukey type algorithm}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)

## Abstract

An information display device includes a component extraction unit, a sorting unit, and a noise component selection unit. The component extraction unit is configured to perform a principal component analysis or an independent component analysis to extract desired components from a plurality of signal waveforms based on detected biological signals. The sorting unit is configured to sort a plurality of extracted results obtained by the component extraction unit in descending order of periodicity and display the sorted results. The noise component selection unit is configured to receive selection of one extracted result as a noise component from the extracted results obtained by the component extraction unit.

## Claims

### Claim 1

An information display device comprising:
a component extraction unit configured to perform a principal component analysis or an independent component analysis to extract desired components from a plurality of signal waveforms based on detected biological signals;
a sorting unit configured to sort a plurality of extracted results obtained by the component extraction unit in descending order of periodicity and display the sorted results; and
a noise component selection unit configured to receive selection of one extracted result as a noise component from the extracted results obtained by the component extraction unit.

### Claim 2 (depends on 1)

The information display device according to claim 1, further comprising a reconfiguration unit configured to remove the noise component based on the one extracted result received by the noise component selection unit, to reconfigure the signal waveforms.

### Claim 3 (depends on 1)

The information display device according to claim 1, wherein the sorting unit is configured to sort the extracted results in descending order of heights of peaks of autocorrelation.

### Claim 4 (depends on 1)

The information display device according to claim 1, wherein the sorting unit is configured to sort the extracted results in descending order of heights of peaks of a fast Fourier transform (FFT).

### Claim 5 (depends on 1)

A biological signal measurement system: comprising:
a measurement device configured to measure a measurement target to detect biological signals; and
the information display device according to claim 1, the information display device being configured to receive the detected biological signals from the measurement device.

### Claim 6

A computer program product comprising a non-transitory computer-readable medium including programmed instructions that cause a computer to function as:
a component extraction unit configured to perform a principal component analysis or an independent component analysis to extract desired components from a plurality of signal waveforms based on detected biological signals;
a sorting unit configured to sort a plurality of extracted results obtained by the component extraction unit in descending order of periodicity and display the sorted results; and
a noise component selection unit configured to receive selection of one extracted result, as a noise component from the extracted results obtained by the component extraction unit.