Eye-friendly green-blue mixed LED lighting method and system for chicken houses

Patent metadata

Field	Value
Publication number	US-10772303-B2
Application number	US-201414760317-A
Country	US
Kind code	B2
Filing date	Jan 14, 2014
Priority date	Jan 14, 2014
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

The invention relates to eye-friendly green-blue mixed LED lighting methods and systems for chicken houses. In a chicken house, an evenly-distributed cyan light environment may be created for rearing broiler chickens. The chicken house may include mixed LED lamps associated with the cyan light environment, and the mixed LED lamp may be formed by combining green LED beads and blue LED beads on a lighting fixture with a mixing proportion of from about 0.2 to about 5. The mixed LED lamps may be used for about 24-hour lighting in the first three days of the breeding period. From the fourth day of the breeding period, the daily lighting duration may be progressively decreased by about one hour every day. The mixed LED lamps may be evenly arranged in the chicken house to form a square array.

First claim

What is claimed is:

1. A method for lighting a chicken house using eye-friendly green-blue mixed LED lamps, the method comprising:
generating, for rearing broiler chickens in the chicken house, an evenly-distributed cyan light environment by combining a plurality of green LED beads and a plurality of blue LED beads to form mixed LED lamps, a ratio between the plurality of the green LED beads and the plurality of the blue LED beads being from 0.2 to 5;
lighting the chicken house using the mixed LED lamps for first three days of a breeding period, at an initial illuminance generated by the mixed LED lamps; and
continuing lighting the chicken house using the mixed LED lamps, while progressively reducing one hour each day from the fourth day of the breeding period until a time period of lighting the chicken house becomes 16 hours per day, wherein the illuminance used is half of the initial illuminance.

2. The method of claim 1 , wherein the mixed LED lamps comprise four mixed LED lamps mounted in the chicken house and arranged into a square array, and wherein the initial illuminance is determined by the following steps:
1, obtaining a minimum illuminance E of the four mixed LED lamps using a following equation 1:

E
=

πΦ
⁢

⁢

H
(

H
2

+

Δ
⁢

⁢

l
2

2

)

-

3

2
⁢

⁢

(
1
)

wherein ϕ is a luminous flux of the mixed LED lamps, H is a mounting height of the four mixed LED lamps and ranges from about 1 meter to 3 meters, ΔI is an initial mounting distance between two adjacent LED lamps, α is a viewing angle of a single mixed LED lamp, and the maximum value of the initial mounting distance ΔI is H tan α;
2, setting the initial illuminance as the minimum illuminance E; and
3, obtaining an actual mounting distance L between two adjacent mixed LED lamps of the mixed LED lamps using the following equation 2:

L
=

[

2
⁢

(

Φ
⁢

⁢

H

2
3

π
⁢

⁢
E

)

-

H
2

]

1
2

(
2
)

further comprising:
arranging the four mixed LED lamps into a L×L square array to create the evenly-distributed cyan light environment based on the actual mounting distance between the two adjacent mixed LED lamps if L is less than or equal to the H tan α; and
if L is greater than H tan α:
reducing by 0.5 meter of the mounting height H and repeating the steps 1-3 until the actual mounting distance obtained is less than or equal to H tan α, and
arranging the four mixed LED lamps into a L×L square array to create the evenly-distributed cyan light environment.

3. The method of claim 1 , wherein chickens may be exposed only to the light of the mixed LED lamps.

4. The method of claim 1 , wherein the illuminance of the mixed LED lamps is controlled by a LED controller using a Pulse-Width Modulation (PWM) dimming mode.

5. A system for lighting a chicken house using eye-friendly green-blue mixed LED lamps, comprising:
a power supply;
a LED controller;
a plurality of mixed LED lamps;
an illuminance sensor; and
a chicken house,
wherein the plurality of mixed LED lamps are configured to be mounted in the chicken house, the LED controller is connected with the illuminance sensor and the plurality of mixed LED lamps, the power supply is connected to the LED controller for providing power, the illuminance sensor is configured to monitor the light intensity of the chicken house and is mounted on the ground of the chicken house, each of the mixed LED lamps is formed by combining a plurality of green LED beads and a plurality of blue LED beads under one lighting fixture at a ratio from 1:5 to 5:1, and a PWM dimming mode is adopted in the LED controller.

6. The system of claim 5 , wherein the plurality of green LED beads and the plurality of blue LED beads are evenly and alternately arranged on a baseplate according to a shape choosing from the group consisting of a

Assignees

• Univ Zhejiang

Inventors

• Pan Jinming
• Yang Yefeng
• Li Xuke
• Jiang Jinsong
• Dai Fengjia

Classifications

• A01K31/18

  Chicken coops or houses {for baby chicks}; Brooders {including auxiliary features, e.g. feeding, watering, demanuring, heating, ventilation (battery breeding cages A01K31/005)} · CPC title

• A01K2207/35

  Animals modified by environmental factors, e.g. temperature, O2 · CPC title

• A01K31/19 Primary

  Brooders {; Foster-mothers; Hovers} · CPC title

• A01K2227/30

  Bird · CPC title