CN103615677A - LED synchronous red-blue light panel light source used for promoting plant growth - Google Patents

Abstract

An LED synchronous red and blue light panel light source for promoting plant growth, which is composed of a high reflection panel, a blue LED light bar, a rare earth light emitting panel, a light guide plate and an aluminum frame, the aluminum frame is a rectangular frame, and the blue LED light bar and the aluminum frame The middle part of the inner side is fixed, the four sides of the cuboid light guide plate are respectively connected with the surrounding blue LED light strips, and the high reflection panel and the rare earth luminescent panel are sealed and bonded to the upper and lower sides of the aluminum frame. The advantages of the present invention are: the structure of the flat light source is simple and easy to implement, realizing the transformation of LED from a traditional point light source to a surface light source, with wide spectrum, high brightness, uniform light color, strong resistance to humidity and heat, and long service life; The half-height width of the red light peak is nearly 70nm, which is closer to the red light component in natural light. The ratio of red and blue light irradiance is adjustable, which can effectively cover the absorption spectrum of plants to meet the needs of plant growth. It can be widely used in intelligent plant factories, vertical Planting, group seedling cultivation, home gardening and other fields.

Description

A LED synchronous red and blue flat panel light source for promoting plant growth

technical field

The invention belongs to the field of semiconductor optoelectronic materials and devices, in particular to an LED synchronous red and blue flat panel light source for promoting plant growth.

Background technique

Light plays a very important role in the growth of plants. Without light, photosynthesis cannot proceed. The light needed for the growth and development of plants usually depends on sunlight, but the industrial production of vegetables, flowers and other economic crops, tissue culture and propagation of test tube seedlings also need artificial light sources for supplementary light. In late autumn, winter, spring and other seasons, the light time is short, and there is a serious lack of light in the greenhouse, so the crops cannot grow normally. In the event of continuous cloudy, foggy, rainy and snowy days, the impact on crop growth will be more serious. At the same time, a large number of studies have shown that different wavelengths of light have different effects on plant photosynthesis. From the knowledge of plant physiology, this is mainly because different pigments absorb different spectra. Chlorophyll a and b absorb red, orange, blue, and purple light. Carotene absorbs blue-violet light, and green light has the lowest absorption rate. Among them, the absorption of chlorophyll a and b to visible light is mainly blue light of 400-500 nm and red light of 600-700 nm. Blue light can promote the growth of green leaves, and red light can help flowering and prolonging the flowering period. These two kinds of light with different light colors are like two kinds of "light fertilizers" needed by plants, and the green light with the intensity of about 500 nm is the most intense in sunlight, and the content in the blue-purple and red-orange regions is relatively weak. Therefore, the development of artificial light sources for promoting plant growth has great ecological and social value.

In response to the needs of artificial light sources in the fields of intelligent plant factories, urban vertical planting, group seedling cultivation, and home gardening, artificial photosynthetic light sources are being intensively developed at home and abroad, and artificial photosynthetic light sources are used to directly supply crops in the shed. Supplementary light is an effective way to promote plant growth, and personalized artificial light sources can be designed for different plants. Scientific research has confirmed that the light for the growth of most plants is mainly concentrated in the red and blue light bands. The effective spectrum of photosynthesis is composed of red light and blue light, which covers the absorption spectrum of the light-harvesting pigment antenna in the plant leaves. It is currently used in the market The red and blue light artificial light source for plant supplementary lighting is mainly composed of blue LED lamp beads with a peak wavelength of about 440-470 nm and red LED lamp beads with a red peak wavelength of about 610-630 nm. The spectrum is narrow and cannot effectively cover plants. The absorption spectrum cannot meet the needs of plant growth. These LED lamp beads are point light sources, and the light color is uneven in space. Using it will easily lead to the deterioration and light decay of LED lamps. Therefore, it is necessary to further develop new red and blue light fixtures to realize the above-mentioned artificial photosynthetic light source.

Contents of the invention

The object of the present invention is to provide a LED synchronous red and blue flat light source for plant growth in view of the above technical analysis and existing problems. Wide, high brightness, uniform light color, strong resistance to heat and humidity, long service life, can effectively cover the absorption spectrum of plants to meet the needs of plant growth. .

Technical scheme of the present invention:

An LED synchronous red and blue light flat light source for promoting plant growth, which is composed of a high reflection panel, a blue LED light bar, a rare earth light emitting panel, a light guide plate and an aluminum frame. The high reflection panel has the ability to reflect the light emitted from the side to the front direction The blue LED light bar emits blue light with a peak wavelength of 445-450 nm, and the rare earth light-emitting panel emits red light with a wavelength of 610-720 nm under the excitation of blue light. The aluminum frame is a rectangular frame, and the inner surface of the blue LED light bar and the aluminum frame The middle part of the side is fixed, and the four sides of the cuboid light guide plate are respectively connected with the surrounding blue LED light strips. The thickness of the light guide plate is the same as the height of the aluminum frame, and the high reflection panel and the rare earth light emitting panel of the same size as the upper and lower sides of the aluminum frame are sealed and bonded On the upper and lower sides of the aluminum frame, the ratio of red and blue light irradiance can be adjusted by changing the thickness of the rare earth light emitting panel and the power of the blue LED light bar light source.

The thickness of the rare earth luminescent panel is 4040-4080 μm.

The power of the blue LED light bar light source is 2-20 W.

The advantages of the present invention are: the structure of the flat light source is simple and easy to implement, realizing the transformation of LED from a traditional point light source to a surface light source, with wide spectrum, high brightness, uniform light color, strong resistance to humidity and heat, and long service life; The half-height width of the red light peak is nearly 70 nm, which is closer to the red light component in natural light. The ratio of red and blue light irradiance is adjustable, which can effectively cover the absorption spectrum of plants to meet the needs of plant growth. It can be widely used in intelligent plant factories, Vertical planting, group seedling cultivation, home gardening and other fields.

【Description of drawings】

Figure 1 is a schematic diagram of the structure of a LED synchronous red and blue flat panel light source.

In the picture: 1. High reflective panel 2. Blue LED 3. Rare earth luminescent panel 4. Light guide plate 5. Aluminum frame

FIG. 2 is an emission spectrum diagram of the LED synchronous red and blue light panel light source in Embodiment 1. FIG.

FIG. 3 is an emission spectrum diagram of the LED synchronous red and blue light panel light source in Embodiment 2. FIG.

【Detailed ways】

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1:

An LED synchronous red and blue light panel light source for promoting plant growth, as shown in Figure 1, is composed of a high reflection panel 1, a blue LED light bar 2, a rare earth light emitting panel 3, a light guide plate 4 and an aluminum frame 5, and the blue LED light Strip 2 emits blue light with a peak wavelength of 445-450 nm, and the rare earth light-emitting panel 3 emits red light with a wavelength of 610-720 nm under the excitation of blue light. The middle part is fixed, and the four sides of the rectangular parallelepiped light guide plate 4 are respectively connected with the surrounding blue LED light strips 2. The thickness of the light guide plate 4 is the same as the height of the aluminum frame 5, and the high reflective panel 1 and the rare earth light plate 1 are the same size as the upper and lower sides of the aluminum frame 5. The light-emitting panel 3 is sealed and bonded to the upper and lower sides of the aluminum frame 5, and the ratio of red and blue light irradiance can be adjusted by changing the thickness of the rare-earth light-emitting panel 3 and the power of the light source of the blue LED light bar 2.

In this embodiment; the thickness of the highly reflective panel (commercial product) is 4 mm, the length is 40 cm, and the width is 30 cm; the wall thickness of the aluminum frame is 5 mm and the height is 7 mm; the blue LED light bar (commercial product) The model is 3528, the total power of the excitation light source is 12 W; the thickness of the light guide plate (commercial product) is 4 mm; the thickness of the rare earth light-emitting panel is 4040 μm.

Figure 2 is the emission spectrum diagram of the LED synchronous red and blue light flat panel light source, which shows that the flat panel light source can emit blue light with peak wavelengths at 450 nm and red light at 655 nm, and the red and blue light irradiation area ratio is 0.8:1.

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Example 2:

An LED synchronous red and blue light panel light source for promoting plant growth, as shown in Figure 1, is composed of a high reflection panel 1, a blue LED light bar 2, a rare earth light emitting panel 3, a light guide plate 4 and an aluminum frame 5, and the blue LED light Strip 2 emits blue light with a peak wavelength of 445-450 nm, and the rare earth light-emitting panel 3 emits red light with a wavelength of 610-720 nm under the excitation of blue light. The middle part is fixed, and the four sides of the cuboid light guide plate 4 are respectively connected with the surrounding blue LED light strips 2. The thickness of the light guide plate 4 is the same as the height of the aluminum frame 5, and the high reflective panel 1 and the rare earth panel 1 are the same size as the upper and lower sides of the aluminum frame 5. The light-emitting panel 3 is sealed and bonded to the upper and lower sides of the aluminum frame 5, and the ratio of red and blue light irradiance can be adjusted by changing the thickness of the rare-earth light-emitting panel 3 and the power of the light source of the blue LED light bar 2.

In this embodiment; the thickness of the highly reflective panel (commercial product) is 4 mm, the length is 40 cm, and the width is 30 cm; the wall thickness of the aluminum frame is 5 mm and the height is 7 mm; the blue LED light bar (commercial product) The model is 3528, the total power of the excitation light source is 2.7 W; the thickness of the light guide plate (commercial product) is 4 mm; the thickness of the rare earth light-emitting panel is 4080 μm.

Figure 3 is the emission spectrum diagram of the LED synchronous red and blue light panel light source, which shows that the panel light source can emit blue light with peak wavelengths at 450 nm and red light at 655 nm, and the red and blue light irradiation area ratio is 5.5:1.

Claims (3)

1. the synchronous red blue light flat-plate light source of the LED for Promoting plant growth, it is characterized in that: by high Reflector Panel, blue LED lamp bar, rare earth luminous panel, LGP and aluminium frame form, high Reflector Panel has the function to frontal reflection the light sending from the side, blue LED lamp bar emission peak wavelength is the blue light of 445-450 nm, rare earth luminous panel is at the ruddiness of blue-light excited lower emission wavelength 610-720 nm, aluminium frame is rectangle frame, the medial surface middle part of blue LED lamp bar and aluminium frame is fixing, four sides of cuboid LGP join with the blue LED lamp bar of surrounding respectively, light guide plate is identical with the height of aluminium frame, the upper and lower surface that the high Reflector Panel identical with aluminium frame top and bottom size and rare earth luminous panel sealing are bonded in aluminium frame, by changing the adjustable red blue light irradiation level ratio of the thickness of rare earth luminous panel and the power of blue LED lamp bar light source.

2. according to claim 1 for the synchronous red blue light flat-plate light source of LED of Promoting plant growth, it is characterized in that: the thickness of described rare earth luminous panel is 4040-4080 μ m.

3. according to claim 1 for the synchronous red blue light flat-plate light source of LED of Promoting plant growth, it is characterized in that: the power of described blue LED lamp bar light source is 2-20 W.

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