CN108302335B

CN108302335B - Lighting device and lamp comprising same

Info

Publication number: CN108302335B
Application number: CN201610745807.7A
Authority: CN
Inventors: 范晓鸣; 周志贤
Original assignee: Opple Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd
Priority date: 2016-08-29
Filing date: 2016-08-29
Publication date: 2020-02-21
Anticipated expiration: 2036-08-29
Also published as: CN108302335A

Abstract

According to the lighting device and the lamp comprising the lighting device, the light emitted in different wavelength ranges is combined according to a specific energy proportion through different light generating parts, so that a specific lighting output is formed, the lighting device can emit the sleeping light with a special spectral characteristic, the energy of the sleeping light is less in a blue light part, and the energy of the sleeping light is more in a red light part. When the lighting device is used as a lighting source before falling asleep at night, the visual comfort can be considered, and the normal secretion of melatonin can be maintained, so that the sleep quality at night is ensured.

Description

Lighting device and lamp comprising same

Technical Field

The present invention relates to a lighting device and a lamp including the lighting device, and more particularly, to a semiconductor lighting device and a lamp including the lighting device.

Background

With the coming of the information age and the transformation of the production and manufacturing mode of the human society, the life rhythm of people is accelerated, the social pressure is increased, and the sleep problems (insomnia, low sleep quality and the like) caused by the accelerated life rhythm are more and more common. According to recent statistics, 30% of people claim to suffer from insomnia and 50% of people consider themselves to be in poor sleep. On the other hand, "drowsy" in which the patient is still unconscious after getting up and even the office is unable to concentrate completely on energy has become an annoyance for many people.

Modern researches show that melatonin can regulate biological rhythm, especially sleep-wake period, is a hormone secreted by pineal body of brain, and has various effects on human body, including supporting and regulating functions on human body secretion, antioxidation, aging delaying and the like, wherein the most obvious effect is sleep improvement, and the melatonin plays a biological role by activating receptors and further influences sleep quality. The effect of the melatonin is influenced by illumination, and experiments show that the effect of the melatonin can be completely inhibited by illumination for 1 hour at the light intensity of 2500LX, the effect of the melatonin can be partially inhibited by illumination lamps commonly used by people, but the effect of the melatonin can be completely inhibited by illumination for more than 12 hours, and the melatonin in a human body can be reduced by continuous illumination, so that the secretion of the melatonin can be influenced by receiving illumination on a visual cross to influence the physiological rhythm of the human body.

The discovery of the third class of photoreceptor cells ipGRC on the retina (Berson et al, 2002; Berson, 2003) has led to the understanding that light not only helps us see objects, but also plays a profound role in influencing our physiological cycle. This effect is particularly evident when a person is asleep and awake. For example, the normal melatonin secretion of a human body is facilitated under the illumination of low illumination and low blue light content before the sleep, so that the sleep quality is ensured. When people are awake, the high-illumination and high-blue-light-content illumination can stimulate the secretion of the waking hormone, so that people can be awake more quickly, and the preparation is made for the pressure to be met.

Compared with the traditional light source, the LED light source has the characteristics of more flexible spectrum adjustment, more accurate brightness adjustment, easier fusion with an intelligent control technology and the like. With the development of LED technology, a lighting lamp which is helpful for maintaining the health of a sleep-wake period is developed and developed, and the lamp can maintain the normal secretion of melatonin when irradiating before falling asleep, so that the sleep quality at night is ensured.

Disclosure of Invention

An object of the present invention is to solve the above-described problems and to provide a lighting device capable of avoiding the suppression effect of melatonin by night lighting.

In order to realize the functions, the invention adopts the technical scheme that the illuminating device comprises

A first light generating section that generates light having energy mainly distributed in a first wavelength region, the first wavelength region being a wavelength region of 440nm to 480 nm;

a second light generating section that generates light having energy mainly distributed in a second wavelength region, the second wavelength region being a wavelength region of 480nm to 580 nm;

a third light generating section that generates light having energy mainly distributed in a third wavelength region, and sets a wavelength region of 580nm to 780nm as the third wavelength region,

the illumination device generates a first illumination output, wherein the first illumination output is characterized in that the maximum spectral intensity of the first illumination output is in the third wavelength region, and the spectral power in the third wavelength region accounts for 50% -85% of the total power; the maximum spectral intensity in the second wavelength region is 40-80% of the maximum spectral intensity of the first illumination output, and the spectral power in the second wavelength region accounts for 15% -40% of the total power; the maximum spectral intensity in the first wavelength region is 0-55% of the maximum spectral intensity of the first illumination output, and the spectral power in the first wavelength region accounts for 0-15% of the total power.

Preferably, the spectral power in the first wavelength region is greater than 3% of the total power.

Preferably, the spectral power in said first wavelength region is less than 10%, preferably less than 5% of the total power.

Preferably, the spectral power in the second wavelength region is greater than 20% of the total power.

Preferably, the spectral power in the second wavelength region is less than 33%, preferably less than 28% of the total power.

Preferably, the spectral power in the third wavelength region is more than 60%, preferably more than 65% of the total power.

Preferably, the spectral power in the third wavelength region is less than 80% of the total power.

Preferably, the first light generating unit is a semiconductor light emitting element, or a phosphor which absorbs light emitted from the semiconductor light emitting element and converts the wavelength of the light into a first wavelength region, or a combination of the two; the second light generating part is a semiconductor light emitting element, or a fluorescent body which absorbs the light emitted by the semiconductor light emitting element and converts the wavelength into a second wavelength region, or a combination of the two; the third light generating unit is a semiconductor light emitting element, or a phosphor which absorbs light emitted from the semiconductor light emitting element and converts the wavelength of the light into a third wavelength region, or a combination of the two.

Preferably, the illumination device may also produce a second illumination output different from the first illumination output.

Preferably, the second illumination output is white light with a color temperature of 2700K-6500K.

The invention also provides a lamp, which comprises a power supply driver and the light-emitting part, and is characterized in that the light-emitting part is the lighting device.

The present invention also provides a lamp including a power driver, a control section, and a light emitting section, wherein the control section controls the light emitting section to generate the first illumination output capable of avoiding an effect of suppressing melatonin secretion in a first period of time and to generate a second illumination output different from the first illumination output in a second period of time, the light emitting section including the illumination device as described above, the first illumination output being generated by the illumination device.

Preferably, the second illumination output is also produced by the illumination device.

Preferably, the light emitting section further comprises a conventional illumination output device, and the second illumination output is generated by the conventional illumination output device.

The present invention also provides a lamp including a power driver, a control section, and a light emitting section, wherein the control section controls the light emitting section to generate the first illumination output which can avoid a suppression effect on melatonin secretion in a first period, to generate a second illumination output different from the first illumination output in a second period, and to generate a third illumination output which has a suppression effect on melatonin secretion in a third period, the light emitting section including the illumination device as described above, the first illumination output being generated by the illumination device.

Preferably, the second illumination output and the third illumination output are also generated by the illumination device.

The invention provides a lighting device, which combines light emitted in different wavelength ranges according to a specific energy ratio through different light generating parts so as to form specific lighting output. When the lighting device is used as a lighting source before falling asleep at night, the visual comfort can be considered, and the normal secretion of melatonin can be maintained, so that the sleep quality at night is ensured.

Drawings

FIG. 1 is some alternative spectra of the sleep light of the present invention;

FIG. 2 is a graph of the relative spectral power distribution of the sleeping light in a first embodiment of the invention;

FIG. 3 is a graph of the relative spectral power distribution of sleep onset light in a second embodiment of the present invention;

FIG. 4 is some alternative spectra of the wake light of the present invention;

FIG. 5 is a graph of the relative spectral power distribution of the wake light in a third embodiment of the present invention;

fig. 6 is a graph of the relative spectral power distribution of wake light in a fourth embodiment of the present invention.

Detailed Description

The lighting device according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

From the background we have known that the wake-up period is one of the most prominent and important of all human circadian rhythms. Whereas melatonin is called sleep hormone and serves to mark changes in the biorhythm. A large number of researches show that illumination has a remarkable influence on melatonin secretion, and particularly, short-wave blue light with the wavelength of 460-480 nm has the strongest inhibition effect on melatonin secretion. Therefore, in order to ensure normal sleep, the energy in the blue light band should be reduced as much as possible when the light is used at night. Meanwhile, high-energy short-wave light, especially 460-480 nm blue light, can stimulate visual cross-nucleation and secrete more waking hormone, thereby playing a role in waking up in morning.

Although melatonin suppression can be avoided by direct use of illumination without blue light, the lack of blue light makes the color strange, and many people have a reading habit before falling asleep and do not like to read under colored light, and therefore white light is desirable during night lighting. What white light we wish to obtain may be helpful to sleep, and we need to quantify the effect of light on the human body for an intuitive analysis. Here, we used a theoretical model of melatonin stimulation values (hereinafter referred to as CS values) developed by professor Mark S Rea, the american LRC institute of higher international recognition and authority. The theoretical model considers the spectral irradiance of the eye position and the spectral sensitivity curves of the four, namely the black vision protein, the photopic vision, the scotopic vision and the S-cone, and the algorithm is as follows:

for

for

M_λthe spectral sensitivity function of retina photoreceptor cells containing the melanoidin is 480nm at the peak value;

V_10λsensing the spectral sensitivity function of the cone cells of medium-wavelength light and long-wavelength light;

V’_λa rod cell spectral sensitivity function;

S_λsensing a cone cell spectral sensitivity function of short-wave light;

P_λspectral eye irradiance (W/m)²/nm）

In the invention, the sleeping light with a smaller CS value is expected to be obtained, and the influence of the illumination on the CS value is great, so that a specific illumination is selected in the invention, and the CS value is measured under a uniform illumination standard. According to the specification of national standard GB50034-2013 architectural lighting design standard, the 0.75m horizontal plane illuminance of an office is 300lx and is converted into illuminance 400lm, and researches show that the illuminance of night lighting should be less than 30% of common illuminance of the office, so that 100lm is selected as the standard illuminance of morning lighting, and the CS value of sleep-falling light refers to a calculated value when the illuminance is 100 lm. The CS value of a 3000K lamp adopted by an office daily is calculated to be about 0.137 when the illumination is 100lm, and the CS value of the light for falling asleep proposed by the invention is at least 10% lower than that of the ordinary light, so that the inhibition of melatonin secretion can be avoided. Meanwhile, the illumination is not only used for falling asleep, but also plays a role in illumination in the night room, so that the comfort of illumination and high color rendering property are ensured.

In the present invention, we wish to obtain that the illumination output is a light falling asleep, and after trial and error we have found that the illumination output with some special features is satisfactory, and that is illustrated in fig. 1 is some alternative spectra which meet these features, the graph being a relative spectrum, so we assign the main peak energy to the value of 1 on the vertical axis, the energy at other points is represented in the graph as the ratio to the main peak energy, and the horizontal axis represents the wavelength value in nm. We now summarize the characteristics of our desired illumination output in conjunction with fig. 1, where we first divide three wavelength regions, the wavelength from 440nm to 480nm being a first wavelength region, denoted a, the wavelength from 480nm to 580nm being a second wavelength region, denoted B, and the wavelength from 580nm to 780nm being a third wavelength region, denoted C. It is known that short-wave blue light with a wavelength of 460-480 nm has the strongest inhibitory effect on melatonin secretion, and therefore the maximum spectral intensity of the illumination output required for falling asleep should be in the third wavelength region, and the energy in this region should be of a certain amount, so that the spectral power in the third wavelength region should be more than 50%, preferably more than 60%, more preferably more than 65% of the total power, and at the same time the spectral power in the first wavelength region should be less than 85% of the total power in order to avoid too red light color. In the invention, energy distribution in the region of 440-780 nm is mainly considered, so that the total of the radiation energy of the color lights with different wavelengths in the region of 440-780 nm is referred to as the total power of the illumination output. In addition to red light, for comfort and color rendering, we should have a certain energy distribution in the second wavelength region and the first wavelength region of the illumination output, the maximum spectral intensity in the second wavelength region is 40-80% of the maximum spectral intensity in the third wavelength region, and the ratio of the spectral power in the second wavelength region to the total power should be more than 15%, preferably more than 20%, less than 40%, preferably less than 33%, more preferably less than 28%. The first wavelength region is the blue region that we need to suppress, so we want the energy in this region to be low, the maximum spectral intensity in the first wavelength region is 0-55% of the maximum spectral intensity in the third wavelength region, and the ratio of the spectral power in the first wavelength region to the total power should be more than 3%, less than 15%, preferably less than 10%, and more preferably less than 5%. Of course, the goal is to provide sleep lighting, and therefore, while meeting the above characteristics, it is desirable to ensure that the spectral power in the first wavelength region is less than the spectral power in the third wavelength region, so that a lower CS value is achieved. The CS value of the illumination output which meets the characteristics is at least 10 percent lower than that of common white light and daily illumination light of offices through actual measurement, and some better schemes can be lower than 50 percent.

Now, some preferred embodiments of the present invention will be further described with reference to the drawings, in which an embodiment of the present invention is a ceiling lamp for indoor home lighting, which is installed in a living room or a bedroom, and includes a light emitting portion, a power driver, and a control portion. The light emitting section includes an illumination device that can emit an illumination output (hereinafter referred to as a first illumination output) having a spectral characteristic satisfying the above-described wakeful light, and a normal illumination output device that can emit a second illumination output. The conventional illumination output device can be any light source frequently used in daily life, such as an LED light source, a fluorescent lamp, an energy-saving lamp and the like, and the second illumination output emitted by the conventional illumination output device is generally white light with the color temperature of 2700K-6500K. The controller may couple the lighting device and the conventional lighting output device such that a first lighting output is produced by the lighting device during a first time period and a second lighting output is produced by the conventional lighting output device during a second time period. In the invention, the first illumination output is the sleep light, so that the first illumination output can be set at night, for example, the time period from 9 to 11 points, the first illumination output is generated by the illumination device to promote the people to calm down to help the people to fall asleep later, and the second illumination output is output by the conventional illumination output device to realize daily illumination in other time periods. In other preferred embodiments, the time periods of the two lighting outputs can be set by the user through a setting interface on the light fixture or through a handheld mobile device in a manner similar to setting an alarm clock.

In order for the illumination device to produce a first illumination output having a particular spectral characteristic, the illumination device in this embodiment comprises: a first light generating section for generating light having energy mainly distributed in a first wavelength region; a second light generating section for generating light having energy mainly distributed in a second wavelength region; the energy of the emitted light is mainly distributed in the third light generating section in the third wavelength region. The light-emitting parts of these different color lights may be LED chips or phosphor materials capable of converting the wavelength of light, and the phosphor materials may be selected from aluminate phosphors, silicate phosphors, nitride phosphors, sulfide phosphors, and the like. As for the first light generating portion, since the main energy thereof is concentrated in the blue region, a blue monochromatic LED chip, which is an LED chip directly excited by a semiconductor material to emit light without a phosphor, may be used, and in addition, the first light generating portion may also adopt a mode in which an LED chip is fitted with a phosphor, that is, the first light generating portion includes a blue phosphor that absorbs light emitted from a semiconductor light emitting element (LED chip) and emits blue light in a first wavelength region by wavelength conversion, which may be a monochromatic LED chip that emits ultraviolet light. The second light generating section and the third light generating section may employ a single color LED chip, or a phosphor that absorbs light emitted from the semiconductor light emitting element and converts the wavelength into a specified wavelength region, similarly to the first light generating section, or a combination of the LED chip and the phosphor. In order to have high color rendering property, it is advantageous to have sufficient emission intensity at all wavelengths, and the spectral intensity distribution of light excited by the phosphor is wide, and it is preferable to use a broad-band phosphor, which is a concept commonly used in the art and refers to a phosphor having a wide excitation light full width at half maximum (FWHM), as compared to a narrow-band phosphor such as yttrium europium oxide (red), quantum dot phosphor, and the like. When the phosphors are used, a single phosphor can be used for the light generating parts, or a combination of two or more phosphors can be used, for example, the second light generating part emits light in a second wavelength region, the light color of the region appears yellow-green, so that a combination of a phosphor for exciting yellow light and a phosphor for exciting green light can be used, or even a combination of phosphors with multiple peak wavelengths can be used, and when a plurality of phosphors are combined, the phosphors are not limited to one component, for example, different yellow-green phosphors in two white light LEDs, and the desired spectral intensity between 480 and 580nm can be obtained by overlapping the spectra generated by the phosphors. Because the red light wave band is adjacent to the green light wave band, the red light generating part also adopts a broadband phosphor and then has certain energy in the green light wave band, thus the light intensity of the wave band can be increased to a certain extent after the light is superposed with the light emitted by the yellow-green light generating part, and the light spectrum meets the requirement of the invention. It should be noted that, the first light generating unit, the second light generating unit, and the third light generating unit are only a description adopted for explaining the present invention, and these light generating units only concentrate the main energy on the defined region, and necessarily have a part of energy falling into other regions, such as the third light generating unit, which mainly emits red light, and the wider emission bandwidth of the red phosphor necessarily has a part of energy in the yellow-green light region, i.e. the second light emitting region, at this time, we can understand that the red phosphor part realizes the function of the third light generating unit, and a part of light is emitted as light in the second wavelength region, i.e. the second light generating unit is actually composed of yellow-green phosphor and red phosphor.

In this embodiment, the lighting device is implemented by matching a blue LED with a green phosphor and a red phosphor, the lighting device has a blue LED chip with a peak wavelength of 450 ± 10nm (error of the chip itself) as a first light generating portion, the second light generating portion is a green phosphor, the green phosphor is excited by the first ten blue LED chip to emit green light with a peak wavelength within 510 to 560nm, and the third light generating portion includes a red phosphor for converting part of the blue light emitted by the first light generating portion into red light. In the present embodiment, the blue LED chip serves as an excitation light source for the first light generating unit, the second light generating unit, and the third light generating unit. Fig. 2 is a relative spectral energy distribution diagram of the first embodiment, the energy of the red light emitted by the third light generating portion forms a first peak in the C region, i.e. the third wavelength region, and the emission peak wavelength thereof is 620nm, and this point energy is the highest point in the whole spectrum, which is denoted as 1. The first light generating part forms a second peak in the first wavelength region in fig. 2, the light emission peak wavelength is 450nm, and the peak intensity is about 21.1% of the first peak intensity. From fig. 2, it can be seen that there is no distinct peak in the second wavelength region, because the second light generating part includes the red phosphor in the third light generating part in addition to the green phosphor, and the energy peak of the two phosphors after the superposition in the second wavelength region is located at the interface with the third wavelength region, i.e. 580nm, and the intensity of the point is about 63.9% of the intensity of the first peak. The ratios of the spectral power in the first, second and third wavelength regions to the total power are 4.9%, 26.7% and 68.4%, respectively, which meet our previously proposed spectral characteristics. We actually measured the parameters of the first embodiment with the color coordinates x =0.4977, y =0.4143, color temperature 2276K, color rendering property 86.01, and the CS value of the spectrum at 100lm is 0.035, which is 74% lower than that of ordinary white light, office daily illumination light, and we expected the effect.

The second embodiment is a lamp used in a bedroom, which can be a ceiling lamp, a wall lamp or a desk lamp, and comprises a light emitting part, a power supply driver and a control part. The light emitting part is a lighting device, and the lighting device in this embodiment includes RGBW four-color LED chips, and these chips can be controlled by the control part to emit lights with different luminances and different colors. The control portion may also control the lighting device to generate a first lighting output by the lighting device during a first time period and a second lighting output by the conventional lighting output device during a second time period in the present embodiment. The first lighting output is light with spectral characteristics consistent with the sleep-enabling function of the invention, and the second lighting output is white light with a color temperature between 2700K and 6500K. Of course in other preferred embodiments, more different effects of light may be added for more periods of time, such as an easily waking lighting output during the morning hours.

FIG. 3 is a spectrum diagram of a first illumination output obtained by mixing RGBW four-color LED chips according to the second embodiment, and we will explain how to generate the first illumination output by using the RGBW four-color LED chips, in combination with the diagram, a first light generating portion is composed of a blue LED and a blue-exciting phosphor of a white LED, and forms a peak in a first wavelength region, the spectrum peak is 455nm, and the maximum spectrum intensity of the blue part is 21.4% of the spectrum peak of the red light; a second light generating part composed of green light LED and phosphor for exciting green light in the white light LED, with a peak wavelength of 520nm in a second wavelength region, and a peak spectral intensity of the green light part being 48.4% of a peak spectrum of the red light; the third light generating section is composed of a red light LED and a red light-exciting phosphor in a white light LED, and has a peak wavelength of 640nm in a third wavelength region. The ratios of the spectral power in the first wavelength region, the second wavelength region and the third wavelength region in the total power are respectively 4.6%, 25.2% and 70.2%, which meet the spectral characteristics proposed by us. We actually measured various parameters of the first illumination output of the second illumination device of the example with color coordinates x =0.4814, y =0.4136, color temperature 2449K, color rendering 90.01, and CS value of the spectrum at 100lm of 0.114, which is 16% lower than that of ordinary white light, office daily illumination light, and this example also achieves the effect we expected.

In a third embodiment, the function of the waking light is added to the second embodiment, and the control unit controls the light emitting unit to generate the first illumination output, i.e., the falling asleep light, which can avoid the suppression effect on the melatonin secretion in the first period, to generate the second illumination output different from the first illumination output in the second period, and to generate the third illumination output, i.e., the waking light, in the third period, which has the suppression effect on the melatonin secretion.

We still used the CS value as a criterion for the wake light, but the CS value for the wake light is a value at 1000lm illuminance. The CS value of the wakeful light proposed in the present invention should be at least 10% higher than that of the ordinary light, i.e. more than 0.6 at 1000lm, so that melatonin secretion can be well suppressed. Meanwhile, the illumination is not only used for awakening but also plays a role in illumination in the morning rooms, so that the comfort of illumination and high color rendering property must be ensured. We have found that the illumination output with specific characteristics is satisfactory, and that alternative spectra are shown in fig. 4, which is a relative spectrum, whereby we assign the main peak energy to the value 1 on the vertical axis, and the energy at other points is shown in the graph as the ratio to the main peak energy, and the horizontal axis represents the wavelength in nm. We now summarize the characteristics of our desired illumination output in conjunction with fig. 1, where we first divide three wavelength regions, the wavelength from 440nm to 480nm being a first wavelength region, denoted a, the wavelength from 480nm to 580nm being a second wavelength region, denoted B, and the wavelength from 580nm to 780nm being a third wavelength region, denoted C. It is known that short-wave blue light with a wavelength of 460-480 nm has the strongest inhibitory effect on melatonin secretion, and therefore the maximum spectral intensity of the illumination output required for wakefulness should be in the first wavelength region and the energy in this region should be of a certain amount, so that the spectral power in the first wavelength region should be more than 25%, preferably more than 30%, more preferably more than 33% of the total power, and at the same time the spectral power in the first wavelength region should be less than 45%, preferably less than 40%, more preferably less than 36% of the total power, in order to avoid too blue light. In the invention, energy distribution in the region of 440-780 nm is mainly considered, so that the total of the radiation energy of the color lights with different wavelengths in the region of 440-780 nm is referred to as the total power of the illumination output. In addition to short-wave blue light, in order to achieve both comfort and color rendering, we should have a certain energy distribution in the second wavelength region and the third wavelength region of the illumination output, the maximum spectral intensity in the second wavelength region is 30-50% of the maximum spectral intensity in the first wavelength region, and the ratio of the spectral power in the second wavelength region to the total power should be more than 30%, preferably more than 35%, less than 50%, and preferably less than 40%. The maximum spectral intensity in the third wavelength region is 15-35% of the maximum spectral intensity in the first wavelength region, and the spectral power in the three wavelength region should be more than 20%, preferably more than 25%, less than 40%, preferably less than 33% of the total power. Of course, our goal is awake lighting, and therefore, while meeting the above characteristics, it should be ensured that the spectral power in the first wavelength region is greater than the spectral power in the third wavelength region, so that a higher CS value is achieved. The actual measurement shows that the illumination output color temperature conforming to the characteristics is larger than 6500K, the display index is larger than 80, and the CS value is larger than 0.6.

In the present embodiment, the third illumination output is still generated by the RGBW four-color LED chip in the illumination device, as shown in fig. 5, the first light generating portion is composed of the blue light-exciting phosphor in the blue LED and the white LED, and forms a peak in the first wavelength region, and the spectral peak is 450 nm; a second light generating part is composed of a green light LED and a phosphor for exciting green light in the white light LED, the peak wavelength of the second light generating part is 545nm and is positioned in a second wavelength region, and the peak spectral intensity of the green light part is 40.4% of the peak spectrum of the blue light; the third light generating part is composed of red light LED and red light exciting phosphor in the white light LED, the peak wavelength of the third light generating part is 635nm and is located in a third wavelength region, and the maximum spectral intensity of a red light part is 38.7% of the peak spectrum of the blue light. The ratios of the spectral power in the first wavelength region, the second wavelength region and the third wavelength region in the total power are respectively 30.5%, 39.3% and 30.2%, which meet the spectral characteristics proposed by us. We actually measured various parameters of the third illumination output of the illumination device in the third embodiment, which have color coordinates of x =0.3064, y =0.3109, color temperature 7000K, color rendering 90.03, and a CS value of the spectrum at 1000lm of 0.649, which is 18% higher than that of ordinary white light, office daily illumination light, and this embodiment achieves the effect we expect.

Certainly, in other embodiments, another single illumination device may be used to implement the light for falling asleep, and we provide a fourth embodiment, but a lighting device for emitting waking light is added, the lighting device is implemented by matching a blue LED with a green phosphor and a red phosphor, the lighting device has a blue LED chip with a peak wavelength of 450 ± 10nm (error of the chip itself) as a first light generating portion, the second light generating portion is a green phosphor, the green phosphor is excited by the blue LED chip as the first light generating portion to emit green light with a peak wavelength within 510-560 nm, and the third light generating portion includes a red phosphor for converting part of the blue light emitted by the first light generating portion into red light. In the present embodiment, the blue LED chip serves as an excitation light source for the second light generating unit and the third light generating unit as well as the first light generating unit. Fig. 6 is a relative spectral energy distribution diagram of wakeful light in the fourth embodiment, and the energy of blue light emitted by the first light generating portion forms a first peak in the region a, i.e. the first wavelength region, and the light emitting peak wavelength is 450nm, and this point energy is the highest point in the whole spectrum, which is denoted by 1. The second light generating portion forms a second peak in a second wavelength region in fig. 6, the emission peak wavelength is 540nm, and the peak intensity is about 35.5% of the first peak intensity. From fig. 6, it can be seen that the third wavelength region does not have a distinct peak, because the third light generating portion includes the green phosphor in the second light generating portion in addition to the red phosphor, and the energy peak of the two phosphors after the superposition in the third wavelength region is located at the interface with the second wavelength region, i.e. 580nm, and the intensity of the point is about 32.4% of the intensity of the first peak. The ratios of the spectral power in the first, second and third wavelength regions to the total power are 33.7%, 36.2% and 30.1%, respectively, which meet the spectral characteristics proposed in the past. We actually measured the parameters of the first embodiment with the color coordinates of x =0.3009, y =0.2939, color temperature 7637K, color rendering 82.66, and the CS value of the spectrum at 1000lm is 0.656, which is 19% higher than the CS value of ordinary white light, office daily illumination light, and reached the effect we expected.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise form disclosed, and it will be apparent that numerous modifications and variations may be made thereto, which will be apparent to those skilled in the art, and are intended to be included within the scope of the invention as defined by the following claims.

Claims

1. An illumination device comprises

the illumination device generates a first illumination output, wherein the first illumination output is characterized in that the maximum spectral intensity of the first illumination output is in the third wavelength region, and the spectral power in the third wavelength region accounts for 50-85% of the total power; the maximum spectral intensity in the second wavelength region is 40-80% of the maximum spectral intensity of the first illumination output, and the spectral power in the second wavelength region accounts for 15% -40% of the total power; the maximum spectral intensity in the first wavelength region is 0-55% of the maximum spectral intensity of the first illumination output, and the spectral power in the first wavelength region accounts for 0-15% of the total power.

2. A lighting device as recited in claim 1, wherein the spectral power in said first wavelength region is greater than 3% of the total power.

3. A lighting device as recited in claim 2, wherein the spectral power in said first wavelength region is less than 10% of the total power.

4. A lighting device as recited in claim 3, wherein the spectral power in said first wavelength region is less than 5% of the total power.

5. A lighting device as recited in claim 1, wherein the spectral power in said second wavelength region is greater than 20% of the total power.

6. A lighting device as recited in claim 5, wherein the spectral power in said second wavelength region is less than 33% of the total power.

7. A lighting device as recited in claim 6, wherein the spectral power in said second wavelength region is less than 28% of the total power.

8. The illumination device of claim 1, wherein the spectral power in the third wavelength region is greater than 60% of the total power.

9. The illumination device of claim 8, wherein the spectral power in the third wavelength region is greater than 65% of the total power.

10. The illumination device of claim 8, wherein the spectral power in the third wavelength region is less than 80% of the total power.

11. The illumination device according to any one of claims 1 to 10, wherein the first light generating section is a semiconductor light emitting element, or contains a phosphor which absorbs light emitted from the semiconductor light emitting element and converts the wavelength into a first wavelength region, or a combination of both; the second light generating part is a semiconductor light emitting element, or a fluorescent body which absorbs the light emitted by the semiconductor light emitting element and converts the wavelength into a second wavelength region, or a combination of the two; the third light generating unit is a semiconductor light emitting element, or a phosphor which absorbs light emitted from the semiconductor light emitting element and converts the wavelength of the light into a third wavelength region, or a combination of the two.

12. A lighting device as recited in any one of claims 1-10, wherein said lighting device is further capable of producing a second lighting output different from said first lighting output.

13. The illumination device of claim 12 wherein the second illumination output is white light having a color temperature between 2700K and 6500K.

14. A lamp comprising a power driver and a light-emitting portion, wherein the light-emitting portion is the lighting device according to any one of claims 1-13.

15. A lamp comprising a power driver, a control section and a light-emitting section, wherein the control section controls the light-emitting section to generate the first illumination output capable of avoiding the suppression of melatonin secretion in a first period of time and to generate a second illumination output different from the first illumination output in a second period of time, the light-emitting section comprising the illumination device according to any one of claims 1 to 13, the first illumination output being generated by the illumination device.

16. The luminaire of claim 15, wherein the second illumination output is also produced by the illumination device.

17. The light fixture of claim 15, wherein said light-emitting portion further comprises a conventional illumination output device, said second illumination output being generated by said conventional illumination output device.

18. The luminaire of claim 15 wherein the second illumination output is white light having a color temperature between 2700K and 6500K.

19. A lamp comprising a power driver, a control section and a light emitting section, wherein the control section controls the light emitting section to generate the first illumination output which can avoid a suppression effect on melatonin secretion in a first period, to generate a second illumination output different from the first illumination output in a second period, and to generate a third illumination output which has a suppression effect on melatonin secretion in a third period, the light emitting section comprising the illumination device according to any one of claims 1 to 13, the first illumination output being generated by the illumination device.

20. The luminaire of claim 19, wherein the second illumination output and the third illumination output are also generated by the illumination device.

21. The light fixture of claim 19, wherein said light-emitting portion further comprises a conventional illumination output device, said second illumination output being generated by said conventional illumination output device.

22. The luminaire of claim 19 wherein the second illumination output is white light having a color temperature between 2700K and 6500K.