ARRAY OF LED ILLUMINATION MODULES OPTIMIZED FOR INITIAL PLANT GROWTH STAGE AND ILLUMINATION DEVICE INCLUDING THE SAME FOR PLANT FACTORY

• US 20170245440A1
• Filed: 10/12/2015
• Published: 08/31/2017
• Est. Priority Date: 10/29/2014
• Status: Abandoned Application

• Current Assignee: Futuregreen Agricultural Co. Ltd.
• Original Assignee: Futuregreen Agricultural Co. Ltd.
• Inventors: CHO, Sung-Bin, KIM, Ji-Dong, KWON, Ki-Biak
• Application Number:
  US15/519,642
• Publication Number:
  US 20170245440A1
• Time in Patent Office: Days
• CPC Class Codes: A01G 7/045 with electric lighting
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 9/02 for simulating daylight F21V9/04, F21V9/06 take precedence
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil
• CPC Class Codes: Y02P 60/14 Measures for saving energy, e.g. in green houses

Abstract

Disclosed is an illumination module array for a plant factory, the array comprising: first blue LED chips; second blue LED chips; a first combination of RGY phosphors applied on the first chip to form a first RGY phosphors-applied LED chip; a second combination of RGY phosphors applied on the second chip to form a second RGY phosphors-applied LED chip, wherein the first combination is configured by combining red, green, and yellow phosphors that light emission from the first RGY phosphors-applied LED chip has a spectrum having a relatively higher intensity in a red wavelength range; wherein the second combination is configured by combining red, green, and yellow phosphors that light emission from the second RGY phosphors-applied LED chip and has a spectrum having a relatively shaper change of an intensity thereof in a blue wavelength range.

Claims

1. An array of LED illumination modules for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the array comprising:

at least one first blue LED chip 10 to emit blue light;

at least one second blue LED chip 20 to emit blue light;

a first combination of RGY phosphors 30 applied on a light emission face of the first blue LED chip to form a first RGY phosphors-applied blue LED chip 10 and 30;

a second combination of RGY phosphors 40 applied on a light emission face of the second blue LED chip to form a second RGY phosphors-applied blue LED chip 20 and 40,

wherein the first combination of RGY phosphors 30 is configured by combining red, green, and yellow phosphors that first light emission from the first RGY phosphors-applied blue LED chip 10 and 30 has a spectrum having a relatively higher intensity in a wavelength range corresponding to a red color;

wherein the second combination of RGY phosphors 40 is configured by combining red, green, and yellow phosphors that second light emission from the second RGY phosphors-applied blue LED chip 20 and 40 has a spectrum having a relatively shaper change of an intensity thereof in a wavelength range corresponding to a blue color,

wherein the first and second light emissions together form combined light emission, wherein the combined light emission has a first intensity peak in a range of 560 nm to 660 nm, and a second intensity peak in range of 430 nm to 460 nm, and a minimum intensity level in a range of 465 nm to 490 nm, wherein the minimum intensity level is higher than a maximum intensity in a range of wavelengths above 700 nm.

2. The array of claim 1, wherein the combined light emission has a third intensity peak in a range of 630 nm to 660 nm, wherein the third intensity peak is separated from the first peak.

3. The array of claim 2, wherein a number of the first RGY phosphors-applied blue LED chips 10 and 30 is arranged along a length direction of the array, and a number of the second RGY phosphors-applied blue LED chips 20 and 40 is arranged along the length direction of the array, wherein the number of the first RGY phosphors-applied blue LED chips 10 and 30 is larger 1.5 to 3.5 times inclusive than the number of the second RGY phosphors-applied blue LED chips 20 and 40 such that the second peak is higher than the first and third peaks.

4. The array of claim 2, wherein a number of the first RGY phosphors-applied blue LED chips 10 and 30 is arranged along a length direction of the array, and a number of the second RGY phosphors-applied blue LED chips 20 and 40 is arranged along the length direction of the array, wherein the number of the first RGY phosphors-applied blue LED chips 10 and 30 is larger 4 to 6 times inclusive than the number of the second RGY phosphors-applied blue LED chips 20 and 40 such that the second peak is lower than the first and third peaks.

5. An illumination device for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the device comprising:

the array 100 of claim 1;

a circuit board 200 on which the array is mounted, wherein the circuit board has patterned circuit wires to control turn on/off of the LED chips and power supply to the LED chips; and

a frame 300 configured to support the circuit board thereon and secure the circuit board thereto.

6. The device of claim 5, further comprising a cover 400 removably attached to the frame on a bottom edge thereof, wherein the cover is configured to protect the circuit board on the frame and the array mounted on the circuit board.

7. The device of claim 6, wherein the first and second blue LED chips are linearly arranged on the circuit board and spaced from each other in an equidistance manner.

8. An illumination device for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the device comprising:

the array 100 of claim 2;

a circuit board 200 on which the array is mounted, wherein the circuit board has patterned circuit wires to control turn on/off of the LED chips and power supply to the LED chips; and

a frame 300 configured to support the circuit board thereon and secure the circuit board thereto.

9. An illumination device for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the device comprising:

the array 100 of claim 3;

a circuit board 200 on which the array is mounted, wherein the circuit board has patterned circuit wires to control turn on/off of the LED chips and power supply to the LED chips; and

a frame 300 configured to support the circuit board thereon and secure the circuit board thereto.

10. An illumination device for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the device comprising:

the array 100 of claim 4;

a circuit board 200 on which the array is mounted, wherein the circuit board has patterned circuit wires to control turn on/off of the LED chips and power supply to the LED chips; and

a frame 300 configured to support the circuit board thereon and secure the circuit board thereto.