# US 2019/0174594 A1 · Photonic engine system for actuating the photosynthetic electron transport chain

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- Number: US 2019/0174594 A1
- Document ID: US20190174594A1
- Status: Published application
- Kind: A1
- Application number: 16/271,952
- Filed: 2019-02-11
- Published: 2019-06-06
- Earliest claimed: 2014-07-21
- Assignees: Once Innovations, Inc.
- Applicants: Once Innovations, Inc.
- Inventors: Zdenko Grajcar
- Web page: https://patentgrep.com/patent/US20190174594A1

## CPC

- A01G 7/045: {with electric lighting}
- H05B 45/20: Controlling the colour of the light
- H05B 45/46: having LEDs disposed in parallel lines
- Y02P 60/14: Measures for saving energy, e.g. in green houses
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A horticultural system having lighting elements pulsed with an off time proportional to the turnover time of the photosynthetic electron transport chain of a plant. The lighting elements emit light at a wavelength within 20 nanometers (nm) of a peak absorption of the pigment of the plant and are controlled to provide light at predetermined intervals as needed by the plant cause photosynthesis and reduce excess unproductive light.

## Claims

### Claim 1

A horticultural system for growing a plant under artificial lighting comprising:
a lighting element positioned in spaced relation to a plant to emit a light onto the plant;
said light comprising wavelengths that are within 20 nanometers (nm) of a peak absorption of a pigment of the plant;
wherein said light from the lighting element is pulsed to provide predetermined intervals of light;
said predetermined intervals of light comprising light that is evenly pulsed.

### Claim 2 (depends on 1)

The horticultural system of claim 1 wherein the predetermined intervals of light are 20 μs.

### Claim 3 (depends on 1)

The horticultural system of claim 1 wherein the light is evenly pulsed to provide 1 μs pulses during the predetermined interval of light.

### Claim 4 (depends on 1)

The horticultural system of claim 1 wherein the first lighting element emits the light at a wavelength between 655 nm and 740 nm.

### Claim 5 (depends on 1)

The horticultural system of claim 1 wherein the first lighting element emits the light at a wavelength between 425 nm and 465 nm.

### Claim 6 (depends on 1)

The horticultural system of claim 1 wherein the lighting element is a light emitting diode.

### Claim 7

A horticultural system for growing a plant under artificial lighting comprising:
a first lighting element positioned in spaced relation to a plant to emit a first light onto the plant;
said first light comprising wavelengths that are within 20 nanometers (nm) of a peak absorption of a pigment of the plant;
a second lighting element positioned in spaced relation to a plant to emit a second light onto the plant;
said second light comprising wavelengths that are within 20 nm of a peak absorption of a pigment of the plant;
wherein the first light and the second light from the first lighting element and second lighting element are pulsed to provide predetermined intervals of light with an off time proportional to a turnover time of a photosynthetic electron transport chain; and
wherein the first light has a greater radiometric intensity than the second light.

### Claim 8 (depends on 7)

The horticultural system of claim 7 wherein the wavelengths of the first light are between 655 nm and 740 nm and the wavelengths of the second light are between 425 nm and 465 nm.

### Claim 9 (depends on 7)

The horticultural system of claim 7 wherein the radiometric intensity of the first light is proportional to the radiometric intensity of the second light.

### Claim 10 (depends on 9)

The horticultural system of claim 9 wherein the radiometric intensity of the first light is proportional to the radiometric intensity of the second light at a ratio of four to one.

### Claim 11 (depends on 9)

The horticultural system of claim 9 wherein the ratio of radiometric intensity of the first light compared to the radiometric intensity of the second light remain constant as the first lighting element and second lighting element are dimmed.

### Claim 12 (depends on 7)

The horticultural system of claim 7 wherein the first lighting element and the second lighting element are light emitting diodes.