CN107750070A - A kind of LED light source and its method for packing of the even light of integrated intelligent plant characteristics spectrum - Google Patents

Abstract

The invention relates to an LED light source with integrated intelligent plant characteristic spectrum uniform light and a packaging method thereof. The light source adopts an integrated packaging process to package blue, white and red LED chips into a light-emitting unit according to different radiation power ratios, and each The radiation intensity of the LED chip can be adjusted separately. Through the intelligent multi-channel constant current drive chip and the MCU control circuit, the radiation can be emitted according to the photosynthetic photon flux density (PPFD) corresponding to the characteristic spectrum of the specific cultivated plant according to the needs of the cultivated plants. Spectrum, to achieve lighting according to the characteristic spectrum of a specific plant, and the spectrum produced by the lighting system composed of multiple LED light sources is consistent in the space it irradiates, overcoming the spatial distribution of plant characteristic spectra produced by other light sources In order to maximize the utilization rate of light energy and maximize the benefit. The invention can provide an ideal lighting device for scientific research and production of modern agriculture such as urban farms, artificial climate chambers and greenhouse seedlings.

Description

An LED light source with integrated smart plant characteristic spectrum uniformity and packaging method thereof

technical field

The invention relates to an LED light source integrated with intelligent plant characteristic spectrum and uniform light and a packaging method thereof, belonging to the field of agricultural optoelectronic engineering.

Background technique

With the advancement of science and technology, the development of modern agriculture, intensive land management and efficient utilization, artificial light sources are playing an increasingly important role, especially LED light sources. Due to their high luminous efficiency, they are not only energy-saving and environmentally friendly, but also have a long life and rich spectrum. , can emit a specific spectrum and is easy to control, coupled with the improvement of luminous efficiency and the reduction of cost, in the selection of plant lighting sources, it has been favored by researchers at home and abroad, and they have increased the research and development of LED lighting in agricultural applications. Experiments show that LED light sources can make plants grow better than traditional light sources. However, various plants have different light requirements. Each plant has its most suitable spectrum, light intensity and light cycle for photosynthesis, which can be called the characteristic spectrum of the plant.

Since all kinds of plants have their own characteristic spectrum, lighting according to the characteristic spectrum of plants can maximize the use of light energy, thereby maximizing agricultural benefits. The biggest problem with LED light sources currently used for plant lighting is the uneven spatial distribution of the spectrum. Based on the characteristic spectrum of plants, the present invention not only realizes that the LED light source can emit the light radiation with the same characteristic spectrum required by plants, but also makes the spectrum uniform in spatial distribution.

Contents of the invention

The technical problem to be solved by the present invention is to provide an LED light source integrated with the characteristic spectrum uniformity of intelligent plants and its packaging method, so as to improve the utilization efficiency of the light source.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: an LED light source with an integrated intelligent plant characteristic spectrum uniform light, which is composed of an LED light source with integrated packaging technology, a multi-channel LED driver chip and an MCU controller. The LED light source emits The spectrum is uniform in spatial distribution.

Further, the multi-channel LED driver chip is composed of two or more dimmable channels, and a multi-channel LED constant current driver chip that can receive a corresponding port of an external PWM control signal.

Further, the MCU controller is used to accept the data information of the characteristic spectrum of the plant, and use it as the basis for the light source to emit light, control the LED light source to emit the spectrum required by the plant, and the spectrum generated by the lighting system composed of multiple LED light sources The space it irradiates is consistent.

The present invention also provides a packaging method for the LED light source with integrated intelligent plant characteristic spectrum and uniform light as described above. unit, and the radiation intensity of blue, white and red LED chips can be adjusted individually.

Further, the radiant power ratio of the blue, white and red LEDs is determined according to the photosynthetic photon flux density ratio corresponding to the characteristic spectrum of a specific cultivated plant.

The present invention also provides another method for packaging the LED light source with integrated intelligent plant characteristic spectrum homogenization as described above, which is characterized in that: select a ceramic cover plate with high transmittance matched with the substrate, and Lithographically carve out three sections, spraying between each section and the outside to form a light partition wall, and then arbitrarily selecting two of the sections to spray white light phosphor and red light phosphor respectively; the positions corresponding to the three sections on the substrate are one by one A blue-ray chip is fixed, and the ceramic cover plate and the base plate are combined and packaged up and down to form a light-emitting unit.

Compared with the prior art, the beneficial effect of the present invention is that: the LED light source can not only emit light according to the characteristic spectrum of the cultivated plants, but also the emitted spectrum is evenly distributed in the space irradiated by it.

Description of drawings

Fig. 1 is a schematic diagram of an integrated intelligent plant characteristic spectrum uniform light LED light source according to an embodiment of the present invention.

Fig. 2 is a plant characteristic spectrum diagram of 3 different plants according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an LED chip integrated package according to Embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of the LED chip before integrated packaging according to the second embodiment of the present invention.

Fig. 5 is a schematic structural view of the LED chip integrated and packaged according to Embodiment 2 of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment one:

As shown in Figures 1-3, an LED light source with an integrated intelligent plant characteristic spectrum uniform light provided by Embodiment 1 of the present invention is composed of an LED light source with integrated packaging technology, a multi-channel LED driver chip and an MCU controller. The spectrum emitted by the light source is uniform in spatial distribution.

In the first embodiment, the multi-channel LED driver chip is composed of two or more dimmable channels, and a multi-channel LED constant current driver chip that can receive a corresponding port of an external PWM control signal.

In the first embodiment, the MCU controller is used to receive the data information of the plant characteristic spectrum, and use it as the basis for the light source to emit light, and control the LED light source to emit the required spectrum. The lighting system composed of multiple LED light sources The resulting spectrum is uniform in the space it illuminates.

In the first embodiment, the present invention also provides a packaging method for the LED light source that integrates the characteristic spectrum of the intelligent plant as described above. As shown in FIG. The red LED chips are packaged into a light-emitting unit according to different radiation power ratios, and the radiation intensity of the blue, white and red LED chips can be adjusted individually.

In the first embodiment, the radiant power ratio of the blue, white and red LEDs is determined according to the photosynthetic photon flux density ratio corresponding to the characteristic spectrum of a specific cultivated plant.

In this embodiment one, the maximum luminous power ratio of the blue, white and red LED chips is determined according to the photosynthetic photon flux density (PPFD) ratio corresponding to the spectral curve of the plant characteristic spectral database (such as 4:1.5:4.5; 4.5 :1.0:4.5; 4.2:1.4:4.4, etc.) and the power parameters of the multi-channel LED constant current drive control chip determine the specific process of integrated packaging for packaging. The peak wavelength of blue light can be 430nm, 450nm or other similar wavelengths, which can be used A single wavelength can also be composed of mixed wavelengths. Similarly, the peak wavelength of red light can be 630nm, 660nm or other similar wavelengths. It can be composed of a single wavelength or a mixed wavelength. On this basis, determine the circuit layout of the substrate and plate making. Select an MCU controller that matches the PWM frequency parameters of the multi-channel LED constant current drive control chip.

The using method of the LED light source of plant characteristic spectrum provided by the present invention specifically comprises the following steps:

Select from the plant characteristic spectrum database according to the cultivation object (or use the experimental method of plant characteristic spectrum to obtain) its corresponding photosynthetic photon flux density (PPFD) ratio to determine the maximum luminous power ratio of blue, white and red LED chips, and compare them The power parameters of the selected multi-channel LED constant current drive control chip determine the specific process of integrated packaging for packaging. Then, according to the requirements of the cultivation environment, design and determine the substrate wiring and plate making, and make the light source.

Select an MCU controller that matches the PWM frequency parameters of the multi-channel LED constant current driver chip.

Choose the compensation point curve as a reference to determine the PPFD value of white light, set the best spectral curve as the control curve, solidify it into the MCU chip, and control the LED light source through the MCU to emit light that is consistent or similar to the characteristic spectrum of the plant.

Based on the optimal spectral curve photosynthesis photon flux density (PPFD) ratio, determine the ratio of blue, white and red LED chips, and design the LED light source. The light source can be designed as a surface light source or as a line light source.

The number and layout of blue light, white light and red light chips are designed according to the uniformity requirements of light emission. For example, each light source is determined according to the photosynthetic photon flux density (PPFD) ratio (such as 4.0:1.5:4.5; 4.5:1.0:4.5; 4.2:1.4:4.4, etc.) and can be driven separately, as shown in Figure 1, where B stands for blue LED, W stands for white LED, R stands for red LED, and the blue , white and red LED chips are integrated into an LED lighting unit, and n integrated LED lighting units are connected in series and parallel to form a specific plant characteristic spectrum light source. Its working principle is: the MCU controller reads the control information from the plant characteristic spectrum database, and sends a light-emitting instruction to the multi-channel LED constant current driver chip, and the multi-channel LED constant current driver chip drives the plant characteristic spectrum light source to emit the light radiation required by the plant .

It is also possible to store the plant characteristic spectrum data that needs to be illuminated in the MCU controller. The number of plant characteristic spectrums stored in it can be determined according to actual needs, and can be one type or more than any number of plant characteristic spectrum data. The MCU controller can also accept the data signal of the external plant characteristic spectrum, and according to this signal, control the light source system to emit light radiation according to the needs of the cultivation object.

Embodiment two:

As shown in Figures 4-5, the second embodiment of the present invention also provides a packaging method for the LED light source that integrates the characteristic spectrum uniformity of intelligent plants as described above, and selects a high-transmittance ceramic (or Quartz glass, etc.) cover plate 1, and three intervals are photoetched on the ceramic (or quartz glass, etc.) Spray white phosphor powder 2 and red phosphor powder 3 respectively; fix a blue light chip 5 on the substrate 6 corresponding to the three intervals, and package the ceramic (or quartz glass, etc.) cover plate 1 and the substrate 6 up and down to form a light-emitting unit, and the current of each blue chip can be adjusted individually.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (6)

1. An LED light source with integrated intelligent plant characteristic spectrum uniform light is characterized in that: it is made up of an integrated packaged LED light source, a multi-channel LED driver chip and an MCU controller, and said LED light source emits a spectrum that is uniform in spatial distribution. 2. An LED light source with integrated intelligent plant characteristic spectrum uniform light according to claim 1, characterized in that: the multi-channel LED driver chip is composed of two or more adjustable light channels, and can receive external It consists of a multi-channel LED constant current drive chip with a port corresponding to the PWM control signal. 3. The LED light source with integrated intelligent plant characteristic spectrum uniform light according to claim 1, characterized in that: the MCU controller is used to accept the data information of the plant characteristic spectrum, and use it as the basis for the light source to emit light, and control The LED light source emits the spectrum required by the plant, and the spectrum produced by the lighting system composed of multiple LED light sources is consistent in the space it irradiates. 4. A method for encapsulating an LED light source that integrates the characteristic spectrum of intelligent plants according to claim 1, wherein the LED light source adopts an integrated encapsulation process to integrate blue, white, and red LED chips according to different radiant powers. It is packaged into a light-emitting unit, and the radiation intensity of blue, white and red LED chips can be adjusted separately. 5. The packaging method of an LED light source that integrates characteristic spectrum uniformity of intelligent plants according to claim 4, characterized in that: the radiant power ratio of the blue, white and red LEDs corresponds to the characteristic spectrum of specific cultivated plants The ratio of photosynthetic photon flux to density is determined. 6. A packaging method for an LED light source that integrates intelligent plant characteristic spectrum uniform light according to claim 1, characterized in that: select a high transmittance ceramic cover plate that cooperates with the substrate, and light on the ceramic cover plate Carve out three intervals, spray between each interval and the outside to form a light partition wall, and then randomly select two of the intervals to spray white light phosphor and red light phosphor respectively; the positions corresponding to the three intervals on the substrate are fixed one by one There is a blue-ray chip, and the ceramic cover plate and the base plate are combined and packaged up and down to form a light-emitting unit.