# US 10,375,794 B2 · Devices having calibrated LEDs

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- Number: US 10,375,794 B2
- Document ID: US10375794B2
- Status: Granted
- Kind: B2
- Application number: 16/141,778
- Filed: 2018-09-25
- Published: 2019-01-24
- Granted: 2019-08-06
- Earliest claimed: 2016-10-03
- Assignees: Google Inc.
- Applicants: Google LLC
- Inventors: Honglei Wu; Cornelius O'Sullivan
- Web page: https://patentgrep.com/patent/US10375794B2

## CPC

- H05B 45/22: using optical feedback
- H05B 45/12: using optical feedback
- H05B 47/12: by detecting audible sound
- H05B 47/125: by using cameras
- G10L 15/00: Speech recognition (G10L17/00 takes precedence)
- G10L 15/22: Procedures used during a speech recognition process, e.g. man-machine dialogue
- G10L 2015/223: {Execution procedure of a spoken command}
- H04R 1/028: {associated with devices performing functions other than acoustics, e.g. electric candles}
- H04R 3/00: Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F)
- H04R 3/005: {for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407)}
- H04R 2410/00: Microphones
- H05B 47/19: via wireless transmission
- Y02B 20/40: Control techniques providing energy savings, e.g. smart controller or presence detection
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

The various implementations described herein include methods, devices, and systems for calibrating LED(s). In one aspect, an electronic device includes: (1) a plurality of light emitting diodes (LEDs); (2) one or more processors; and (3) memory storing a plurality of color correction matrices, each color correction matrix of the plurality of color correction matrices: (a) corresponding to an LED of the plurality of LEDs, (b) generated based on a desired color value for the corresponding LED, and (c) scaled to prevent overrange of color values for the corresponding LED; and the memory includes instructions for operating the plurality of LEDs in accordance with the stored plurality of color correction matrices.

## Claims

### Claim 1

An electronic device, comprising:
a plurality of light emitting diodes (LEDs);
one or more processors; and
memory storing a plurality of color correction matrices, each color correction matrix of the plurality of color correction matrices:
corresponding to an LED of the plurality of LEDs,
generated based on a desired color value for the corresponding LED, and
scaled to prevent overrange of color values for the corresponding LED;
wherein the memory includes instructions for operating the plurality of LEDs in accordance with the stored plurality of color correction matrices.

### Claim 2 (depends on 1)

The electronic device of claim 1, wherein the instructions for operating the plurality of LEDs includes settings for one or more operating parameters of each LED of the plurality of LEDs.

### Claim 3 (depends on 2)

The electronic device of claim 2, wherein the one or more operating parameters includes a brightness parameter.

### Claim 4 (depends on 1)

The electronic device of claim 1, wherein each LED of the plurality of LEDs is a full color LED.

### Claim 5 (depends on 1)

The electronic device of claim 1, wherein each LED of the plurality of LEDs has a red, green, and blue (RGB) values that are modified by application of the corresponding color correction matrix.

### Claim 6 (depends on 1)

The electronic device of claim 1, wherein each LED of the plurality of LEDs is uncalibrated.

### Claim 7 (depends on 1)

The electronic device of claim 1, wherein each LED of the plurality of LEDs is configured to output light having one or more color components of a plurality of color components; and
wherein the plurality of color correction matrices includes a color correction matrix corresponding to each color component of the one or more color components.

### Claim 8 (depends on 1)

The electronic device of claim 1, wherein the electronic device is a voice-activated device.

### Claim 9 (depends on 1)

The electronic device of claim 1, wherein the memory stores one or more applications, the one or more applications including instructions to operate the plurality of LEDs in conjunction with the plurality of color correction matrices.

### Claim 10 (depends on 9)

The electronic device of claim 9, wherein the instructions to operate the plurality of LEDs includes instructions regarding one or more of: illumination duration, pulse rate, duty cycle, color sequence, and brightness.

### Claim 11 (depends on 1)

The electronic device of claim 1, wherein the memory stores instructions for operating the plurality of LEDs in conjunction with the plurality of color correction matrices in accordance with a color design language.

### Claim 12 (depends on 1)

The electronic device of claim 1, wherein the electronic device is configured to relay status of the electronic device via the plurality of LEDs operating in conjunction with the plurality of color correction matrices.