TW201304179A - Apparatus and method for mixing LED light - Google Patents

Abstract

The present invention discloses an apparatus and method for mixing LED light. The apparatus comprises at least a green LED, at least a warm-white LED and at least a cold-white LED. The warm-white LED uses a blue LED chip to excite a fluorescent material in order to generate the warm-white light. The warm-white light is mixed with the green light and cold-white light generated by the green LED and cold-white LED respectively, so as to provide a mixed light with full spectra that is suitable for lighting and helping growth of the animals or plants.

Description

LED light mixing method and device

The invention relates to an LED light mixing method and device, which is further mixed with the green LED and the cool white LED through a warm white LED to achieve a mode similar to sunlight or full spectrum to be suitable for illumination of animals and plants. The light source needed for growth.

Nowadays, science and technology are changing with each passing day, and the standard of living is greatly improved. The requirements for materials are getting higher and higher. Therefore, more functions and functions are required for the items around the life. Among them, the lighting devices used for interior decoration or landscaping, whether it is fluorescent lamps, lighting lamps, projection lamps, chandeliers, landscape lamps, aquarium lamps or neon lights, etc., are all visible lighting devices and are more visible. In the future, the technology that uses LED Light Emitting Diodes instead of lighting will become more sophisticated and more in line with the green trend.

The LED light-emitting diode is a special kind of diode. When a forward voltage is applied, the light-emitting diode can emit monochromatic and discontinuous light, which is a kind of electroluminescence effect. By changing the chemical composition of the semiconductor material used, the light-emitting diode can emit light in the near ultraviolet, visible or infrared light, and has the following characteristics: (1) small volume: can be used for illumination of the array package, and can be used for its application. Conditions to make combinations of different color types. (2) Long life: its luminous life can reach more than 10,000 hours, which is more than 50 times higher than that of conventional tungsten filament bulbs. (3) Durable: Since the light-emitting diode is packaged with a transparent optical resin, it is shock and shock resistant. (4) Environmental protection: Since its internal structure is not mercury-containing, there is no pollution and waste disposal. (5) Energy saving and low power consumption: The white light emitting diode is the star of the "green lighting source", because its power consumption is about 1/3~1/5 of the general tungsten light bulb.

There are four forms of light effects on plants: light quality, photoperiod, light intensity, and light quantity. Plant growth and yield (plant size, number of flowers, and other characteristics) are mainly affected by the amount of light received throughout the day. The morphology (height and plant type) of plants is mainly related to light quality (mainly blue light, red light). For photoperiod sensitive plants, flowering (short-day and long-day plants) is mainly affected by the duration of light or photoperiod, while the photoperiod-insensitive plants (neutral) have the greatest influence on the amount of light, and photosynthesis is mainly affected by light and light. Strength effect.

Photosynthesis mainly occurs in the visible spectrum (wavelength is 400~700nm). The effects of different wavelengths of light on photosynthesis are different. The light of 400~520nm (blue) and 610~720nm (red) contribute the most to photosynthesis. . Light from 520 to 610 nm (green) is absorbed by plant pigments at a very low rate. At present, the LED plant growth lamp commercially available is based on the growth mechanism of plant photosynthesis photoselectivity, using LED as the light source, mixing colors according to the scientific RB ratio, and synthesizing the light necessary for plant growth, and the spectrum is concentrated at 440~450. Nm, 650~660 nm. Compared with ordinary plant growth lamps, the advantages are obvious. Ordinary plant growth lamps radiate ultraviolet and infrared light that are useless to plant growth, and waste a lot of electric energy. LED plant growth lamps use electroluminescence mechanism under the same light intensity conditions. LED plant growth lamps save more than 80% of electricity than ordinary plant growth lamps. The lifespan of ordinary plant growth lamps is generally only 1000-5000 hours, while the life of LED plant lamps can reach 30,000-50,000 hours. It has long-lasting effect, energy saving, high utilization rate of light energy, and does not produce light that is ineffective for plant growth.

"White light" LED usually refers to a multi-color mixed light. The white light seen by the human eye is formed by at least two kinds of wavelengths of light. For example, blue light plus yellow light can obtain two wavelengths of white light; blue light and green light. When light and red light are mixed, white light of three wavelengths can be obtained. The most common use of white LED lamps is the use of blue LEDs as the core to excite the yellow phosphor, which in turn produces a visual white light effect. As far as the energy distribution is concerned, there are two peaks in the blue region having a wavelength of 445 nm and the green region having a wavelength of 550 nm. The wavelength of 610~720nm red light required by plants is very scarce, which explains why it is more unfavorable for plant growth under the illumination of white LED lamps.

The CIE 1931 XYZ color space (also known as the CIE 1931 color space) was created in 1931 according to the International Commission on Illumination (CIE), which is a mathematically defined color space. Please refer to Figure 1. Figure 1 is a spectrum analysis diagram of a conventional white LED. Among them, the spectral analysis chart data of the conventional white LED is as follows:

CIE1931 color parameters:

Color coordinates: x=0.2945 y=0.3416/u’=0.1809 v’=0.4723

Color temperature Tc: 7361K Main wavelength: Ld=494.5nm

Color purity: 12.6% Centroid wavelength: 525.0nm

Color ratio: R=22.9% G=69.6% B=7.4%

Peak wavelength: Lp=630.0nm Half width: 18.6 nm

Color rendering index: Ra=48.8 R1=36 R2=71 R3=75 R4=47 R5=54 R6=63 R7=54 R8=-8 R9=-177 R10=33 R11=35R12=71 R13=44 R14=82 R15=21

Photometric parameters:

Luminous flux: 373.91 lm Radiant flux: 1.3976W

Light efficiency: 42.73lm/W

Electrical parameters:

Lamp electrical parameters:

U=220.0V I=0.05500A

P=8.750W PF=0.7190

Instrument status:

Scanning range: 380.0nm-800.0nm

Reference channel: REF=30923 (R=4)

Scan interval: 5.0nm[0]

Maximum fluctuation: %=-0.224%

Main channel peak: Ip=5252 (G=3, D=51)

Multiplier tube: 21.0 ° C Test device: 22.4 ° C

It can be seen from the above data that although the conventional white light LED is a white light effect on the visual effect of the human eye through the mixed light of (R, G, B) red, green, and blue, in the spectral analysis diagram, Do not form three peak shapes of red, green and blue, so it is not close to the full spectrum of sunlight, so the wavelength of some colors is not within the spectral value of the conventional white LED. As shown in Figure 1, the A region between the blue and green Green spectral wavelengths, that is, between 490 nm and 530 nm, and the B region between the green and red Red spectral wavelengths, that is, Located in the range of 550nm~610nm, the spectral values in the A and B intervals are very low, and it is obvious that the color gamut is still not uniformly distributed over the entire visible spectrum wavelength of 400~700nm.

In view of this, in order to improve the troubles caused by the deficiency and lack of the conventional white LED, the inventors decided to study and improve it, and proposed an LED light mixing device to solve the disadvantage of the plant growth caused by the conventional white LED. And trouble, to achieve the LED light mixing device closer to the full spectrum in order to more meet the needs of animal and plant growth.

The main object of the present invention is to provide an LED light mixing device in which a warm white LED is further mixed with a green LED and a cool white LED to achieve a mode close to sunlight or a full spectrum. A light source used for the illumination of animals and plants.

To achieve the above object, the present invention provides an LED light mixing device, wherein the LED light mixing device includes: at least one green LED, at least one warm white LED, and at least one cool white LED. The warm white LED is a white light-colored warm white light generated by a blue LED excited by a blue LED, and further mixed with the green LED and the cool white LED to achieve an LED device close to the full spectrum.

In order to more clearly describe the LED light mixing method and apparatus proposed by the present invention, the following will be described in detail in conjunction with the drawings.

Please refer to FIG. 2, which is a spectrum analysis diagram of the LED light mixing structure of the present invention. The present invention is an LED light mixing device comprising: at least one green LED, at least one warm white LED, and at least one cool white LED. In the present invention, the warm white LED is a white light-colored warm white light generated by a blue LED excited by a blue LED, and further mixed with the green LED and the cool white LED to achieve a full spectrum. LED device. The composition of the phosphor may be composed of yttrium-aluminum-gallium (YAG).

The cool white LED system in the present invention includes: at least one red LED, at least one green LED, and at least one blue LED constitutes three wavelengths of white light. The spectral value of the LED light mixing device is between 0.18 and 1; and the wavelength value is between 400 um and 700 um.

The LED light mixing method of the present invention is mainly used in an LED light mixing device composed of a variable proportion of R (red LED), G (green LED), and B (blue LED) three primary color LEDs, and at least an additional A warm white LED is disposed therein to achieve a pattern in which the spectrum produced by the LED light mixing device is close to sunlight or a full spectrum, and is more suitable for a light source required for illumination growth of animals and plants. The LED light mixing device includes the R (red LED), G (green LED), or B (blue LED) trichromatic LEDs in addition to the at least one warm white LED and the at least one cold white LED. At least one of them.

In another embodiment, the aforementioned LED mixed light combination may additionally add a predetermined proportion of the cool white LEDs.

In a preferred embodiment of the present invention, the number of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED may be preferably 0:1:0:3:3. That is to say, the ratio of 0 red LEDs to 1 green LED with 0 blue LEDs and 3 warm white LEDs combined with 3 cool white LEDs constitutes the LED light mixing device of the present invention.

According to the color mixing principle of color physics theory, the essence of the three primary colors is the independence of the three primary colors, and any of the three primary colors (red R, green G, blue B) cannot be synthesized with the other two colors; and the three primary colors have the largest Mixed color gamut, other colors can be mixed by a certain proportion of the three primary colors, and the number of colors obtained after mixing is the largest. In addition, in the dispersion test of white light, we can also observe that the red, green and blue colors are more evenly distributed across the visible spectrum, and occupy a wider area, so that it is generally blue, yellow or red. The green and blue primary colors can be combined to form white light, but there is still a color difference between the white light and the sunlight. When we can observe the sunlight through the Mitsubishi mirror, we can see more than seven kinds of color light. Sunlight is not available in normal two-color or three-primary light. Therefore, the LED light mixing device of the present invention combines three sets of warm white LEDs with a group of the green LEDs and three sets of cool white LEDs to achieve a better effect of the full spectrum light mixing effect.

As shown in FIG. 2, the spectral analysis chart data of the LED light mixing device of the present invention is as follows:

CIE1931 color parameters:

Color coordinates: x=0.3506 y=0.3919/u’=0.2003 v’=0.5038

Color temperature Tc: 4942K Main wavelength: Ld=565.0nm

Color purity: 22.9% Centroid wavelength: 558.0nm

Color ratio: R = 15.7% G = 81.7% B = 2.6%

Peak wavelength: Lp=525.0nm Half width: 140.6nm

Color rendering index: Ra=77.4 R1=75 R2=78 R3=84 R4=80 R5=74 R6=72 R7=88 R8=69 R9=1 R10=50 R11=78 R12=46 R13=74 R14=91 R15 =68

Photometric parameters:

Luminous flux: 637.06 lm Radiant flux: 1.9090W

Light efficiency: 62.09 lm/W

Electrical parameters:

Lamp electrical parameters:

U=220.0V I=0.06000A

P=10.26W PF=0.7670

Instrument status:

Scanning range: 380.0nm-800.0nm

Reference channel: REF=49833 (R=4)

Scan interval: 5.0nm[0]

Maximum fluctuation: %=-0.016%

Main channel peak: Ip=3499 (G=3, D=54)

Multiplier tube: 23.3 ° C Test device: 25.0 ° C

In the other preferred embodiments described below, since most of the elements are the same or similar to the foregoing embodiments, the same elements and structures will not be described below, and will be described in the following.

Referring to FIG. 3, FIG. 3 is a spectrum analysis diagram of the first preferred embodiment of the LED light mixing structure of the present invention. In the first preferred embodiment of the present invention, the number of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED may be 1:1:1:3:3. That is, the LED light mixing device of the first preferred embodiment of the present invention is constructed by using a red LED with one green LED and one blue LED with three warm white LEDs and three cool white LEDs.

As shown in FIG. 3, the spectral analysis chart data of the first preferred embodiment of the LED light mixing device of the present invention is as follows:

CIE1931 color parameters:

Color coordinates: x=0.3275 y=0.3132/u’=0.2164 v’=0.4618

Color temperature Tc: 5765K Main wavelength: Ld=380.0nm

Color purity: 5.8% Centroid wavelength: 549.0nm

Color ratio: R=20.4% G=73.6% B=6.0%

Peak wavelength: Lp=465.0nm Half width: 38.8nm

Color rendering index: Ra=88.3 R1=83 R2=91 R3=92 R4=89 R5=86 R6=88 R7=97 R8=81 R9=44 R10=88 R11=86 R12=77 R13=84 R14=93 R15 =78

Photometric parameters:

Luminous flux: 756.94lm Radiant flux: 2.7786W

Light efficiency: 49.44 lm/W

Electrical parameters:

Lamp electrical parameters:

U=220.0V I=0.08200A

P=15.31W PF=0.8450

Instrument status:

Scanning range: 380.0nm-800.0nm

Reference channel: REF=57374 (R=4)

Scan interval: 5.0nm[0]

Maximum fluctuation: %=0.122%

Main channel peak: Ip=7122 (G=3, D=55)

Multiplier tube: 25.8 ° C Test device: 29.2 ° C

However, the wavelength of the emitted light that contributes to the photosynthesis of plants is between 400 and 700 nm, that is, the red, green, and blue bands, which simulates the general sunlight to illuminate the plants and further allows the plants to perform photosynthesis. The photoreceptor in plants can absorb the red light band in the emitted light and make appropriate adjustments to plant physiology. Furthermore, the wavelength of the emitted light between 400 and 700 nm contributes to the physiological reaction of the plant's Cryptochrome and the phototropin, and the cryptochrome and the plant photon can absorb the emitted light. The ultraviolet and blue bands provide immediate adjustments to plant physiology.

Therefore, the light source generated by the LED light mixing device of the present invention is constructed by using three sets of warm white LEDs, a group of green LEDs, and three groups of cool white LEDs to achieve the light mixing of the LEDs. The spectral value of the device is between 0.18~1 and the wavelength value is between 400um and 700um. The projected spectral content includes: red, orange, yellow, yellow green, green, blue, cyan, blue. , 靛, purple, etc., white light mixed with various colors of light. Furthermore, it can be further seen in the spectral analysis diagram of the LED light mixing device of the present invention shown in FIG. 2 that the wavelength and color gamut of the LED light mixing device of the present invention are more extensive, further filling the spectral analysis of the conventional white light LED as shown in FIG. The deficiency of the vacant part of the B region shown in the figure is roughly in the range of 550 nm to 610 nm between the wavelengths of green Green and red Red, and the color rendering index Ra=77.4 of the LED light mixing device of the present invention is far more than that of the conventional white light. LED color rendering index: Ra=48.8 is closer to the coloring index of the Sun of the International Commission on Illumination CIE, Ra=100, so it is a kind of LED light mixing device closer to the full spectrum, which is more suitable for the illumination of the illumination of animals and plants.

In summary, the LED light mixing device of the present invention does achieve an effect similar to the full spectrum, and has a large light energy similar to sunlight, and the plant growth increases the amount of sunlight per hour of the plant, and has The specific wavelength of the emitted light can simulate the sunlight to illuminate the plant, so that the plant can be photosynthesized, and the light receptor in the plant can absorb the emitted light of a specific wavelength, instantly adjust the plant physiology, and promote the flowering of the plant, further Provides a comfortable, natural and near-sunlight source lighting device that allows users to easily use it for lighting reading or work, thus reducing eye strain and burden, even allowing plants and fish, reptiles, insects, etc. Good light source growth environment.

The above-mentioned embodiments are not intended to limit the scope of application of the present invention, and the scope of the present invention should be based on the technical spirit defined by the content of the patent application scope of the present invention and the scope thereof. It is to be understood that the scope of the present invention is not limited by the spirit and scope of the present invention, and should be considered as a further embodiment of the present invention.

Figure 1 is a spectral analysis of a conventional white LED.

Figure 2 is a spectrum analysis diagram of the LED light mixing device of the present invention.

FIG. 3 is a spectrum analysis diagram of the first preferred embodiment of the LED light mixing device of the present invention.

Claims (12)

An LED light mixing device comprising: at least one of three primary color LEDs of R (red LED), G (green LED), or B (blue LED); at least one warm white LED; and at least one cool white light LED; wherein the warm white LED is a white light-colored warm white light generated by a blue LED excited by a blue LED. The LED light mixing device according to claim 1, wherein the LED light mixing device is in accordance with a spectral analysis chart of the CIE 1931 color space defined by the International Commission on Illumination (CIE). In the wavelength range between 400um and 700um, the spectral values are maintained between 0.18 and 1. The LED light mixing device of claim 1, wherein the ratio of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED is 0:1:0:3: 3. The LED light mixing device of claim 1, wherein the cool white LED comprises: at least one red LED, at least one green LED, and at least one blue LED to form three wavelengths of white light. The LED light mixing device according to claim 1, wherein the composition of the phosphor is made of yttrium-aluminum-gallium (YAG). The LED light mixing device of claim 1, wherein the ratio of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED is 1:1:1:3: 3. An LED light mixing method, which is an LED light mixing device composed of a variable proportion of R (red LED), G (green LED), and B (blue LED) three primary colors, and additionally adds at least a warm white LED and at least one cool white LED are disposed therein to achieve a mode in which the spectrum generated by the LED light mixing device is close to sunlight or a full spectrum; wherein the LED light mixing device is in addition to the at least one warm white LED and In addition to at least one cool white LED, at least one of the R (red LED), G (green LED), or B (blue LED) trichromatic LEDs is included. The LED light mixing method according to claim 7, wherein the LED light mixing device is in accordance with a spectral analysis chart of the CIE 1931 color space defined by the International Commission on Illumination (CIE). In the wavelength range between 400um and 700um, the spectral values are maintained between 0.18 and 1. The LED light mixing method of claim 7, wherein the ratio of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED is 0:1:0:3: 3. The LED light mixing method of claim 7, wherein the cool white LED comprises: at least one red LED, at least one green LED, and at least one blue LED constitutes three wavelengths of white light. The LED light mixing method of claim 7, wherein the warm white LED is a white light-colored warm white light generated by a blue LED excited by a blue LED; and the phosphor component is It is made of yttrium-aluminum-gallium (YAG). The LED light mixing method of claim 7, wherein the ratio of the red LED, the green LED, the blue LED, the warm white LED, and the cool white LED is 1:1:1:3: 3.