# US 11,297,774 B2 · Lighting device for plant growth

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- Number: US 11,297,774 B2
- Document ID: US11297774B2
- Status: Granted
- Kind: B2
- Application number: 16/373,845
- Filed: 2019-04-03
- Published: 2020-02-27
- Granted: 2022-04-12
- Earliest claimed: 2018-08-24
- Assignees: Solidite Corp.
- Applicants: Solidlite Corp.
- Inventors: Hsing Chen; Wei-Hao Chen; Hsun-Yu Shih
- Web page: https://patentgrep.com/patent/US11297774B2

## CPC

- A01G 7/045: {with electric lighting}
- A01G 9/249: {Lighting means (with special arrangements for promoting growth A01G7/045)}
- F21V 21/14: Adjustable mountings
- H05B 45/10: Controlling the intensity of the light
- F21Y 2115/10: Light-emitting diodes [LED]
- 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)
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

The present disclosure discloses a lighting device for plant growth, comprising: a lamp, a lifting mechanism, at least two sensing mechanisms and a control mechanism. A light-emitting module is disposed on the bottom surface of the lamp and two ends of the lifting mechanism are coupled to the top surface of the lamp and the control mechanism respectively. Each sensing mechanisms is disposed at the bottom of the lamp. The control mechanism comprises a timing module. When the sensing mechanisms operate that form a signal sensing path and sense a plant to generate a sensing signal, the control mechanism may drive the lifting mechanism according to the sensing signal to control the longitudinal displacement of the lamp. Through the automatic detection and position lifting function, it is possible to provide suitable light sources for plants at different growth stages.

## Claims

### Claim 1

A lighting device for plant growth suitable for the growth of a plant, wherein the lighting device for plant growth comprises:
a lamp having a light-emitting module on a bottom surface thereof;
a lifting mechanism connecting a top surface of the lamp;
at least two sensing mechanisms disposed at the bottom of the lamp, the sensing mechanisms and the light-emitting module having a longitudinal separation distance therebetween, each of the sensing mechanisms having a transmitter and a receiver configured with displacement, and a signal sensing path being formed between the transmitter and the receiver, wherein two adjacent transmitters having a distance of at least 10 cm therebetween;
a control mechanism being coupled to the lamp, the lifting mechanism and each of the sensing mechanisms, and the control mechanism comprising a timing module, the control mechanism for activating or deactivating each of the sensing mechanisms according to a timed trigger signal generated by the timing module, when the sensing mechanism operating to form the signal sensing path and sensing the plant to generate a sensing signal, the control mechanism driving the lifting mechanism according to the sensing signal to control the longitudinal displacement of the lamp.

### Claim 2 (depends on 1)

The lighting device for plant growth according to claim 1, wherein the at least two sensing mechanisms are arranged on the same horizontal line.

### Claim 3 (depends on 2)

The lighting device for plant growth according to claim 2, wherein the signal sensing paths of each of the sensing mechanisms are parallel to each other.

### Claim 4 (depends on 2)

The lighting device for plant growth according to claim 2, wherein the number of the sensing mechanisms is in even number, and the signal sensing paths for each two of the sensing mechanisms are perpendicular to each other.

### Claim 5 (depends on 2)

The lighting device for plant growth according to claim 2, wherein the number of the sensing mechanisms is in even number and the signal sensing paths for each two of the sensing mechanisms are mutually intersecting.

### Claim 6 (depends on 1)

The lighting device for plant growth according to claim 1, wherein the at least two sensing mechanisms are disposed on different horizontal lines.

### Claim 7 (depends on 6)

The lighting device for plant growth according to claim 6, wherein the signal sensing paths of each of the sensing mechanisms are parallel to each other.

### Claim 8 (depends on 6)

The lighting device for plant growth according to claim 6, wherein the number of the sensing mechanisms is in even number and the signal sensing paths of each two of the sensing mechanisms are perpendicular to each other.

### Claim 9 (depends on 6)

The lighting device for plant growth according to claim 6, wherein the number of the sensing mechanisms is in even number and the signal sensing paths of each two of the sensing mechanisms are mutually intersecting.

### Claim 10 (depends on 1)

The lighting device for plant growth according to claim 1, wherein the control mechanism further comprises a light source control module coupled to the lamp to adjust the intensity of the light emitted by the light-emitting module.

### Claim 11 (depends on 10)

The lighting device for plant growth according to claim 10, wherein the control mechanism further comprises: a power module connecting to the lamp, the sensing mechanism, and the timing module and the light source control module; a control module connecting the lamp, the sensing mechanism, the timing module, the light source control module and the power module, the control module being capable of receiving the timed trigger signal to activate or deactivate each of the sensing mechanisms, and the control module being capable of receiving a signal of the light source control module to adjust and control the light of the light-emitting module; and a driving module coupled to the power module, the control module and the lifting mechanism, when the control module receiving the sensing signal, the driving module being controlled by the control module to drive the lifting mechanism to operate.

### Claim 12 (depends on 1)

The lighting device for plant growth according to claim 1, wherein the light-emitting module comprises at least one light emitting diode.

### Claim 13 (depends on 12)

The lighting device for plant growth according to claim 12, wherein the light-emitting diodes are in plurality, and each of the light emitting diodes radiates at different wavelengths.

### Claim 14 (depends on 13)

The lighting device for plant growth according to claim 13, wherein the control mechanism further comprises a light source control module coupled to the lamp to adjust the intensity of the light emitted by the light-emitting module.

### Claim 15 (depends on 12)

The lighting device for plant growth according to claim 12, wherein the light-emitting diodes are in plurality and each of the light emitting diodes radiates at same wavelength.

### Claim 16 (depends on 15)

The lighting device for plant growth according to claim 15, wherein the control mechanism further comprises a light source control module coupled to the lamp to adjust the intensity of the light emitted by the light-emitting module.

### Claim 17 (depends on 12)

The lighting device for plant growth according to claim 12, wherein the light emitting diode radiates an ultraviolet light.

### Claim 18 (depends on 17)

The lighting device for plant growth according to claim 17, wherein wavelength of the ultraviolet light is between 280 nm and 400 nm.

### Claim 19 (depends on 18)

The lighting device for plant growth according to claim 18, wherein the control mechanism further comprises a light source control module coupled to the lamp to adjust the intensity of the light emitted by the light-emitting module.

### Claim 20 (depends on 19)

The lighting device for plant growth according to claim 19, wherein the control mechanism further comprises: a power module connecting the lamp, the sensing mechanism, the timing module and the light source control module; a control module connecting the lamp, the sensing mechanism, the timing module, the light source control module and the power module, the control module being capable of receiving the timed trigger signal to activate or deactivate each sensing mechanism, and the control module being capable of receiving a signal of the light source control module to adjust the light of the light-emitting module; and a driving module coupled to the power module, the control module and the lifting mechanism, when the control module receiving the sensing signal, the driving module being controlled by the control module to drive the lifting mechanism to operate.