JP2010200746A - Method for forcing plant using led lamp, and device for forcing plant using led lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for forcing plants using LED lamps including appropriately adjusting the mixing ratio of red LED lamps and blue LED lamps utilizing rapid ON/OFF characteristics and homochromatic lighting characteristics of the LED lamps to adjust the light amount ratio at which light is emitted, so as to maximally promote the growth of the cultured plants via a means for repeating lighting time and turning-off time in a prescribed speed range, and to provide a device for forcing plants using LED lamps. <P>SOLUTION: The method for forcing plants using LED lamps includes: mixing red LED light having a wavelength band of 660 nanometers and blue LED light having a wavelength band of 450 nanometer in a quantity ratio of 5:1 so as to regulate the quantity ratio of the red LED light to the blue LED light into (5:1)-(10:1); and regulating the ratio of the lighting time to the turning-off time into (1:1) or (1:2) so that the lighting time is regulated between 100 microseconds and 10 seconds. The device for forcing plants using LED lamps is provided. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention appropriately adjusts the mixing ratio of the red LED lamp and the blue LED lamp by using the fast ON / OFF characteristic and the monochromatic light emission characteristic of the LED lamp, and adjusts the light quantity ratio to which the light is irradiated, thereby turning on and off the light. It is an object of the present invention to provide a forcing cultivation method and apparatus capable of maximally promoting the growth of cultivated plants through means for repeating time within a constant speed range.

  The action of chloroplasts contained in plants and phytoplankton to synthesize carbohydrates such as starch from carbon dioxide and water by the power of sunlight is called carbon assimilation. In the ecosystem, nutrient production and oxygen in the air and water are generated. The process by which green plants and other living organisms turn light energy into chemical energy is called photosynthesis. Living things on earth can live for oxygen in the air and carbohydrates on the ground, both of which begin with photosynthesis.

  Therefore, in order to achieve plant photosynthesis more efficiently, it can be achieved through a method of effectively supplying a light source belonging to a specific wavelength band.

  The present invention provides a method and an apparatus for promoting the growth of a plant using an LED lamp belonging to a specific wavelength band so as to cope with such a principle.

  In the present invention, a red LED having a wavelength band of 660 nanometers and a blue LED having a wavelength band of 450 nanometers are selected, the ratio of the combination of the red LED and the blue LED is set to 5: 1, and the light quantity ratio is set to 5: 1 to 5: 1. The ratio of lighting and extinguishing time is set to 1: 1 or 1: 2 in combination with 10: 1, and light is irradiated to increase the maximum photosynthetic efficiency. Such a method is continuously applied to cultivated plants. Through the LED lamp illumination device that can be supplied, it achieves the desired high rate growth promotion.

  In the present invention, a red LED having a wavelength band of 660 nanometers and a blue LED having a wavelength band of 450 nanometers are combined at a ratio of 5: 1, and the light quantity mixing ratio of the red LED and the blue LED is 5: 1 to 5: 1. After setting the ratio of 10: 1, supply with the ratio of lighting and extinguishing time set to 1: 1 or 1: 2, and set the lighting time between 100 microseconds and 10 seconds to supply Can achieve maximum photosynthetic efficiency (see FIGS. 1 to 3), and in particular, most plants have good photosynthesis with red LEDs in the 660 nm wavelength band and blue LEDs in the 450 nm wavelength band. However, it was found that the most vigorous photosynthesis was achieved when the light quantity ratio between the red LED lamp and the blue LED lamp was 5: 1 to 10: 1.

  In addition, it is confirmed that the effect increases when turning on / off at a faster speed than when illuminating light continuously, and the ratio of the lighting to extinction time is 1: 1 or 1: 2 is the highest efficiency. Appeared. It has been found that the lighting time is most suitable between 100 microseconds and 10 seconds.

  Furthermore, the present invention combines the quantity ratio of the red LED in the 660 nanometer wavelength band and the blue LED in the 450 nanometer wavelength band at a ratio of 5: 1, and adjusts the intensity of the blue LED separately to adjust the light quantity of the red LED to the blue LED. The controller and the switch device are configured so that the ratio can be combined at a ratio of 5: 1 to 10: 1, and the ratio of lighting and extinguishing time can be set to 1: 1 or 1: 2. By configuring and using, the amount of light in the exact wavelength band necessary for promoting the growth of cultivated plants and the survey time can be adjusted and supplied with a time difference, and through this, the maximum efficiency can be obtained I can play.

It is the figure which showed the efficiency of the photosynthesis by the wavelength band of an LED lamp. It is the figure which showed the growth rate of the photosynthesis by the hue combination of an LED lamp. It is the figure which showed the speed | rate of the photosynthesis according to the illumination time of the LED lamp. It is an example of the illuminating device block diagram which concerns on this invention. It is an example of the circuit diagram of the LED lamp which concerns on this invention. It is an example of a circuit diagram of a controller according to the present invention. 1 is a diagram illustrating an overall apparatus according to the present invention. It is the figure which showed an example of the signal of Mono1 and Mono2 which concern on this invention.

  The present invention combines the quantity of red LEDs in the 660 nanometer wavelength band and blue LEDs in the 450 nanometer wavelength band in a ratio of 5: 1, and adjusts the brightness of the blue LEDs separately, and the ratio of the amount of light between the red LEDs and the blue LEDs. Can be combined at a ratio of 5: 1 to 10: 1, the ratio of lighting and extinguishing time is 1: 1 or 1: 2, and the lighting time is set between 100 microseconds and 10 seconds This is a plant-forcing cultivation method using an LED lamp in which the light quantity ratio between the red LED and the blue LED and the illumination time can be adjusted by the method.

  To this end, the present invention provides a red LED 2 having a wavelength band of 660 nm and a blue LED 3 having a wavelength band of 450 nm as shown in FIGS. An insulating material lighting plate 1 in which LEDs are arranged to have a quantity ratio of 5: 1 is configured by means of arranging one LED row, and five rows of red LEDs 2 arranged in the lighting plate 1 are arranged in series. The blue LEDs 2 in a row are arranged in series, one terminal of the red LED 2 and the blue LED 3 is connected by a common terminal, the red LED drive power and the blue LED drive power are supplied to the + terminals of the red LED 2 and the blue LED 3, and the controller circuit A brightness adjusting unit 4 for adjusting the blue LED + power supply voltage and a switch adjusting unit 5 for LED ON / OFF control are provided.

  Further, a plurality of arranged LEDs are in series, and a current limiting resistor (RL) is connected in series to one of them.

  Moreover, in order to make the ratio of the light quantity of the red LED 2 and the blue LED 3 5: 1, the red LED 2 and the blue LED 3 are basically mounted in one row and supplied to the blue LED row. Only the power supply voltage is separately adjusted by the controller 6 so that the amount of light is adjusted. For example, when the supply voltage of a blue LED is set to be a red LED, the ratio of the amount of light of the red LED to the blue LED is 5: 1 (because it has 5 rows of red LEDs and 1 row of blue LEDs). Is reduced to half, the light quantity ratio of the red LED to the blue LED becomes 10: 1. If the voltage is further lowered, only the blue LED disappears.

  On the other hand, the controller 6 includes a blue LED brightness adjustment unit 4 and an ON / OFF time adjustment unit 5.

  First, the brightness adjustment unit 4 has a blue LED supply voltage adjustment circuit, where VR is rotated to move the position of point B from M to N, and the blue LED supply voltage (Vb) is adjusted.

  Here, ZD is a Zener diode. The voltage of ZD serves to maintain the voltage at the N point constant, but this ZD voltage is used for a voltage equal to the N point in FIG. 5, that is, the Vd point.

  For example, if 20 LEDs are connected in series in a row and the operating voltage across each LED is 1.8V, the voltage at the Vd point will be 36V (1.8V × 20). When the voltage for 36V is used, the voltage at the N point becomes 36V, and when VR is moved to move to the N point (minimum), the Vd voltage also becomes 36V. At this time, no current flows through the blue LED. (Disappears).

  However, when the VR is turned to move the point B to the point M (maximum), the Vb voltage becomes the same as the Vr voltage and the blue LED becomes as bright as the red LED (the ratio of the red LED to the blue LED is 5: 1). ) If the B point is placed at the midpoint between M and N, the Vb voltage will be 41V (between 36V and 46V), the blue LED current will be half that of the red LED, and the brightness of the blue LED will be half that of the red LED. Therefore, the ratio of red LED to blue LED is 10: 1.

  As described above, Vb can be arbitrarily changed by VR between Vd and Vr (between 36 V and 46 V in the example), so that the magnification of the blue LED with respect to the red LED can be easily and arbitrarily adjusted. (Maximum 5: 1 when Vb is Vr, disappears when Vb is Vd, 10: 1 ratio of red LED to blue LED when Vb is the middle point of Vr and Vd)

  Further, the controller 6 includes a time adjusting unit 5 for turning on / off the LED lamp.

  Here, after a high-speed ON / OFF switch (S1) made of a semiconductor element such as a transistor, FET, or IGBT is connected in series to one side (common terminal) of the power supplied to the LED lamp, this S1 Turn on / off the LED while turning on / off. The ON / OFF time is as shown in FIG. 8, and S1 is turned on when point b becomes H, and turned off when it becomes L. This signal oscillates by feedback coupling of two monostable circuits (Mono1 and Mono2). This occurs as a result of configuring the circuit, where Mono2 sets the ON time and Mono1 sets the OFF time.

  As shown in the drawing, the descending signal at the output point a of Mono1 triggers Mono2, and the output point b of Mono2 is also fed back to Mono1, triggering Mono1 to perform infinite ON / OFF operation, and output of Mono2 As for the signal, b turns on S1 and lights the LED.

Here, C1 and R1 of Mono1 are changed to adjust the turn-off time (OFFTIME), and C2 and R2 of Mono2 are changed to adjust the turn-on time (ONTIME). ON and OFFTIME are about 100 microseconds, respectively. To 10 seconds.
If all LEDs are to be lit continuously, S2 should be turned on.

1: Lighting plate 2: Red LED 3: Blue LED 4: Brightness adjustment unit 5: Time adjustment unit 6: Controller

Claims (3)

  A red LED of 660 nanometer wavelength band and a blue LED of 450 nanometer wavelength band are mixed in a ratio of 5: 1, and the light quantity ratio of red LED to blue LED is adjusted to 5: 1 to 10: 1. In this way, the LED lamp is used in such a way that the ratio of lighting and extinguishing time is 1: 1 or 1: 2 so that the lighting time is adjusted between 100 microseconds and 10 seconds. Plant forcing cultivation method.   A red LED 2 having a wavelength band of 660 nanometers and a blue LED 3 having a wavelength band of 450 nanometers are arranged on the insulating material lighting plate 1 so that the quantity ratio is 5: 1. Drive power is supplied to the LED light emitting unit, the red LED and the blue LED arranged so as to be adjusted at 5: 1 to 10: 1, the brightness adjusting unit 4 and the LED ON / OFF control switch adjusting unit 5 The plant forcing cultivation apparatus using the LED lamp provided with the controller 6 provided with.   The LED drive power supply gives a function that can adjust the voltage only to the blue LED drive power supply, and the light quantity of the blue LED can be adjusted from 1/5 to 1/10 of the red LED, and the blue LED can be turned off. A semiconductor switch (S1) that has a function and is connected in series to the red LED and blue LED supply common line, and controls the time so that it can be repeatedly turned on and off between 100 microseconds and 10 seconds The plant forcing cultivation apparatus using the LED lamp of Claim 2 provided with the controller comprised so that can be performed.

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