CN102036435A - A light-color modulation method and a light-color-variable light-emitting diode light source module - Google Patents

Abstract

The present invention discloses a light color modulation method and a light color variable LED light source module, which are suitable for modulating mixed light with predetermined color coordinates or predetermined color rendering properties. The LED light source module comprises a first wide spectrum LED, a second wide spectrum LED and a control unit. The first and second wide spectrum LEDs are modulated by the control unit to generate a first wide spectrum monochromatic light and a second wide spectrum monochromatic light respectively. The half-wave width of the first wide spectrum monochromatic light and the second wide spectrum monochromatic light is greater than 20 and has different color coordinates. Therefore, after appropriate modulation by the control unit, the color coordinates of the mixed light formed by mixing the first and second wide spectrum monochromatic lights will fall on the line of the color coordinates of the first and second wide spectrum monochromatic lights and have a predetermined color rendering property. By adopting the light color modulation method and the light color variable LED light source module of the present invention, light with predetermined color coordinates, color temperature or color rendering properties can be modulated, and mixed light with a continuous light spectrum can be obtained.

Description

A light-color modulation method and a light-color-variable light-emitting diode light source module

technical field

The invention relates to a light emitting diode light source module, in particular to a light color variable LED light source device and a light color modulation method.

Background technique

Light Emitting Diode (LED) is a light-emitting component made of semiconductor materials, which has the advantages of small size, long life, low driving voltage, low power consumption, and good shock resistance. At present, LEDs have been widely used in fields such as indicator lights, lighting and backlights.

Most of the light used for general lighting is white light, and since a single LED chip has a narrow emission spectrum and cannot emit white light itself, some techniques are needed to achieve the purpose of generating white light. There are two common methods of producing white light at present. One is to use the blue light generated by the blue LED to excite the phosphor to produce yellow light, which is mixed with the blue light to form white light; the second is to use red LED, green LED and blue LED at the same time to mix into white light .

Light with different light colors has different color temperature (Color Temperature, hereinafter referred to as color temperature). For example, when the color temperature of the light source is below 3000K, the light color begins to appear reddish, giving people a warm feeling; when the color temperature exceeds 5000K, The color is biased towards blue light, giving people a cool feeling. Therefore, changes in the color temperature of the light source will affect the atmosphere in the room. In order to allow users to adjust the color temperature of indoor lighting, most of the existing LED color-tunable modules use LED modules with variable light colors obtained by mixing red LEDs, green LEDs, and blue LEDs. Since the emission spectrum of monochromatic light LEDs is generally not wide, it is a narrow-spectrum light source. Therefore, most of the color spectrum of white light mixed with light has poor continuity, which in turn makes its color rendering index (CRI) poor. For applications in the field of lighting, the quality of white light required is relatively high, and a relatively continuous spectrum is required (for example: white light requires high color rendering). However, it is impossible to obtain a more continuous spectrum (that is, white light with high color rendering) by using the existing red LED, green LED and blue LED to adjust the light color.

Contents of the invention

The technical problem to be solved by the present invention is to provide a light color modulation method and a variable light color LED light source module, so as to generate light with a relatively continuous light spectrum and obtain white light with high color rendering by the modulation method.

Hereinafter, the so-called "more than one", "more than two", "more than three", and "at least one" are counted together; "multiple" does not include one.

To achieve the above object, according to the light color modulation method of the present invention, it includes modulating a plurality of white light-emitting diodes (LEDs) with high color rendering to generate at least a first white light and a second white light, and then mixing the first white light and the second white light The second white light, the color coordinates of the first white light and the second white light are different, and the color rendering of the first white light and the second white light is greater than or equal to 85, and the color rendering of at least one white light can be greater than or equal to 90 in a preferred state. , the best condition can make the color rendering of at least one white light greater than 95.

The aforementioned steps of generating the first white light and the second white light are to excite the blue LED chip to generate blue light, and then pass the blue light through a fluorescent layer to generate a green light and a red light respectively, and then mix the blue light, red light and green light The aforementioned first white light or second white light is generated.

The aforementioned step of passing the blue light through the fluorescent layer can also be changed to pass the blue light through the fluorescent layer to generate yellow light and red light respectively, and then mix the yellow light, red light and blue light to generate the first white light or the second white light. In addition, blue light can also be passed through the fluorescent layer to generate green light, yellow light and red light respectively, and then the green light, yellow light, red light and blue light are mixed to generate the aforementioned first white light or second white light.

Furthermore, the aforementioned steps of generating the first white light and the second white light can also be used to excite an ultraviolet (UV, ultraviolet) LED chip to generate ultraviolet light, and then make the ultraviolet light pass through a fluorescent layer to generate red light, green light and a blue light, and then mix red light, green light and blue light to generate the aforementioned first white light or second white light.

The aforementioned light color modulation method further includes modulating a monochromatic LED to generate a monochromatic light, and then mixing the monochromatic light, the first white light and the second white light, and the monochromatic light is narrow-spectrum monochromatic light, or preferably Or, the monochromatic light can be a wide-spectrum monochromatic light, which can be formed by exciting a monochromatic phosphor comprising a UV LED; or, it can be formed by exciting a monochromatic phosphor comprising a blue LED, wherein the blue light is completely absorbed by the monochromatic phosphor, This is also one of the categories defined by broad-spectrum monochromatic light.

Moreover, in order to achieve the above object, according to another embodiment of the light color modulation method of the present invention, it includes modulating a plurality of wide-spectrum monochromatic LEDs to generate a first wide-spectrum monochromatic light and a second wide-spectrum monochromatic light, and The first broad-spectrum monochromatic light is mixed with the second broad-spectrum monochromatic light. Wherein the half-wave width of the first and second broad-spectrum monochromatic light is greater than or equal to 20 nanometers, preferably greater than or equal to 25 nanometers, and most preferably greater than or equal to 30 nanometers, it is worth noting that: when the value of the half-wave width The larger the , the better the color spectrum continuity of the mixed light; wherein, the color coordinates of the first broad-spectrum monochromatic light are different from the color coordinates of the second broad-spectrum monochromatic light.

Moreover, in order to achieve the above object, according to the first embodiment of the LED light source module with variable light color of the present invention, the LED light source module includes a first white LED, a second white LED and a control unit. The first white light LED is activated by the control unit to generate first white light and its color rendering property is greater than or equal to 85. The second white light LED is activated by the control unit to generate second white light and mix with the first white light. The color rendering of the second white light is greater than or equal to 85. The color coordinates of the first white light are different from the color coordinates of the second white light.

Wherein the first white LED and the second white LED may respectively include a blue LED chip and a fluorescent layer. The fluorescent layer contains a plurality of fluorescent powders. The blue LED chip produces blue light after being excited. When the blue light passes through the fluorescent layer, the fluorescent powder is excited to generate multiple monochromatic lights, and the monochromatic lights are mixed with the blue light to generate the aforementioned first white light or second white light. The control unit adjusts the color coordinate or color rendering of the mixed light by modulating the current and pulse width or current and pulse width of the first and second white LEDs.

According to the second embodiment of the color-variable LED light source module of the present invention, it includes a first white LED, a second white LED, a monochromatic LED and a control unit. The monochromatic LED is activated by the control unit to produce a monochromatic light. The monochromatic light is mixed with the first white light and the second white light to generate mixed light. The control unit obtains the mixed light with predetermined color coordinates or color rendering properties by modulating the first white LED, the second white LED, and the single-color LED.

In addition to mixing monochromatic light with the first white light and the second white light to generate mixed light, wide-spectrum monochromatic light can also be used. For example, the wide-spectrum monochromatic light LED includes a UV LED chip and a fluorescent layer. The fluorescent layer has a fluorescent powder, and the UV LED chip generates an ultraviolet light when excited. The ultraviolet light passes through the fluorescent layer and emits the wide-spectrum monochromatic light, and mixes the wide-spectrum monochromatic light with the first white light and the second white light to generate mixed light; or, the wide-spectrum monochromatic light can also be produced by a blue LED chip, Combined with monochromatic phosphors, monochromatic phosphors completely absorb the light emitted by blue LEDs and convert it into the desired wide-spectrum monochromatic light.

Moreover, in order to achieve the above object, according to the third embodiment of the light color variable LED light source module of the present invention, it includes a first wide-spectrum monochromatic LED, a second wide-spectrum monochromatic LED, and a control unit. The first broad-spectrum monochromatic LED is activated by the control unit to generate first broad-spectrum monochromatic light. The second broad-spectrum monochromatic LED is activated by the control unit to generate second broad-spectrum monochromatic light. The second broadband monochromatic light is mixed with the first broadband monochromatic light to generate mixed light, wherein the half-wave width of the first broadband monochromatic LED and the second broadband monochromatic LED is greater than or equal to 20 nanometers, The color coordinates of the first broad-spectrum monochromatic light are different from the color coordinates of the second broad-spectrum monochromatic light.

By adopting the light color modulation method of the present invention and the variable light color LED light source module of the present invention, light with predetermined color coordinates, color temperature or color rendering properties can be modulated, and mixed light with continuous light spectrum can be obtained. Moreover, the present application utilizes that the color temperature of white LEDs is not easy to drift with the temperature rise when the current is passed, so that no matter whether multiple high color rendering white LEDs are used or at least one monochromatic LED is used for the light color and color temperature When modulating, it is easier to control and make changes in the range.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

Fig. 1 is a schematic flow chart of the first embodiment of the light color modulation method according to the present invention;

FIG. 2A, FIG. 2B and FIG. 2C are schematic diagrams of the light spectrum of the first white light and the second white light according to the present invention;

3A and 3B are schematic diagrams of the color coordinate positions of FIG. 2A, FIG. 2B and FIG. 2C on the CIE color coordinate diagram;

Fig. 4 is a schematic flowchart of step S10 according to the first embodiment of the light color modulation method of the present invention;

FIG. 5 is a schematic flowchart of a first embodiment of Step S100 of the light color modulation method according to the present invention;

6 is a schematic flowchart of a second embodiment of step S100 of the light color modulation method according to the present invention;

FIG. 7 is a schematic flowchart of a third embodiment of Step S100 of the light color modulation method according to the present invention;

FIG. 8 is a schematic flowchart of a fourth embodiment of Step S100 of the light color modulation method according to the present invention;

Fig. 9 is a schematic diagram of a first additional process according to the first embodiment of the light color modulation method of the present invention;

10 is a schematic flow chart of step S14 of the light color modulation method according to the present invention;

Fig. 11 is a schematic diagram of a second additional process according to the first embodiment of the light color modulation method of the present invention;

Fig. 12 is a schematic flowchart of the second embodiment of the light color modulation method according to the present invention;

13 is a schematic flow chart of step S20 of the light color modulation method according to the present invention;

14 is a schematic structural view of a first embodiment of a light-color-variable light-emitting diode (LED) light source module according to the present invention;

Fig. 15 is a schematic structural view of the second embodiment of the LED light source module with variable light color according to the present invention;

16 is a schematic structural view of a third embodiment of an LED light source module with variable light color according to the present invention;

Fig. 17 is a schematic structural diagram of the fourth implementation scope of the LED light source module with variable light color according to the present invention;

Fig. 18 is a schematic structural diagram of an LED light source module with variable light color applied to a lamp according to the present invention.

Among them, reference signs:

40. Lamps

42: lamp body

44a, 44b: LED light source module with variable light color

52: Substrate

520, 522, 524, 526: Monochromatic LED chips

60, 70, 80: LED light source module with variable light color

62, 72: First white LED

64, 74: Second white LED

56, 66, 76, 86: Control unit

620, 640, 720, 740, 780, 820, 840: substrate

622, 642, 722: blue LED chips

624, 644, 724, 744, 784: fluorescent layer

621, 641: bearing cup

625, 645, 728, 748, 786, 825, 845: light guide glue

626, 646, 725, 745, 826: first phosphor

627, 647, 726, 746, 846: Second phosphor

727, 747: third phosphor

785: fourth phosphor

742, 782, 822, 842: UV LED chips

824: the first fluorescent layer

844: Second fluorescent layer

78, 82, 84: Wide Spectrum Monochrome LEDs

90, 92, 94: peak (blue light, green light, red light)

W1, W2, W3: 1st, 2nd, 3rd white light

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

The first embodiment of the light color modulation method

FIG. 1 is a schematic flowchart of a first embodiment of a light color modulation method according to the present invention. It can be seen from the figure that the light color modulation method includes S10: modulating a plurality of white LEDs to generate at least one first white light and one second white light; and S12: mixing the first white light and the second white light.

The aforementioned light color modulation method refers to a method of adjusting the color coordinates of the generated light. The color rendering properties of the first white light and the second white light are greater than or equal to 85. In a preferred state, the color rendering of at least one white light can be greater than or equal to 90, and in an optimal state, the color rendering of at least one white light can be greater than 95. The color coordinates of the first white light are different from the color coordinates of the second white light.

Please refer to FIG. 2A , FIG. 2B and FIG. 2C , which are schematic diagrams of light spectrums of the first white light and the second white light according to the present invention. The horizontal axis in FIG. 2A represents wavelength in nanometers, and the vertical axis represents light intensity in relative intensity (A.U.). It can be seen from Fig. 2A that the light spectrum has three main peaks 90, 92, 94, representing three different colors respectively. The vicinity of the spectrum marked 94 represents red light. The vicinity of the spectrum marked 92 represents green light. The vicinity of the spectrum marked 90 represents blue light. It can be seen from the spectrum diagram of FIG. 2A that the light generated is white light. Among the components of the white light, the light intensity of the blue light 90 is greater than that of the green light 92 . The light intensity of green light 92 is greater than the light intensity of red light 94 . In this example, the ratio of the peak intensities of the red light 94 , the green light 92 and the blue light 90 is about 1:0.6:0.46. But the present invention is not limited thereto. It can also be seen from FIG. 2A that in the spectral range of visible light (400-780 nm), the light intensity of each wavelength is quite continuous. The white light in FIG. 2A has a color rendering of 94 and a color temperature of 6000K. Because in this embodiment, the used green phosphor absorbs blue light and converts it into green light, and the red phosphor absorbs blue light and converts green light into red light, so when the blue light current increases, the intensity of blue light increases, while the green light Phosphor powder and red phosphor powder absorb blue light at the same time. Therefore, when the high color rendering white LED uses current to adjust the luminous intensity, its color temperature, coordinates, and peak spectrum ratio do not change with the current adjustment.

It can be seen from FIG. 2B that the white light in FIG. 2B also has three light colors: red light 94 , green light 92 and blue light 90 . The difference from FIG. 2A is that the light intensities of the main color lights in the spectral diagram of FIG. 2B are blue light 90 , red light 94 , and green light 92 in order from strong to weak. And although there are differences in the intensity of the three light colors, the differences are not large. Similarly, the light intensity of each wavelength in FIG. 2B is quite continuous, and the measured color rendering of the white light in FIG. 2B is also 94.

In FIG. 2C , the light intensities of the main light colors of white light are red light 94 , green light 92 and blue light 90 from strong to weak. Among them, the light intensity of the blue light 90 and the green light 92 are very close. The light intensity of each wavelength of this white light is quite continuous, and its color rendering is also 94.

Please continue to refer to FIG. 3A and FIG. 3B . It is a schematic diagram of the color coordinate positions of FIG. 2A , FIG. 2B , and FIG. 2C on the CIE color coordinate diagram. The point marked W1 in the figure corresponds to the position of the color coordinates of the white light in FIG. 2A . The point marked W2 in the figure corresponds to the position of the color coordinates of the white light in FIG. 2B . The point marked W3 in the figure corresponds to the position of the color coordinates of the white light in FIG. 2C .

The position of the white light W1 in Figure 2A is closer to the position of the blue light (also because of the higher proportion of the blue light), and is generally called cool white light (Cool White). Its color temperature value is about 6000K. The position of the white light W2 in FIG. 2B is closer to the position of the white light of the naked eye, which is generally called neutral white light (Neutral White). Its color temperature value is about 4200K. The position of the white light W3 in FIG. 2C is closer to the position of the red light, which is generally called warm white light (Warm White). Its color temperature value is about 3700K.

The first white light or the second white light in step S10 can be two of white lights W1 , W2 , W3 shown in FIG. 2A , FIG. 2B and FIG. 2C , but not limited thereto.

The step S10 of modulating a plurality of white light LEDs to generate at least the first white light and the second white light refers to modulating two or more white light LEDs. If there are only two white LEDs, they respectively generate the first white light and the second white light. If there are three white LEDs with different color coordinates, three kinds of white light will be produced. That is, there may be three kinds of white light W1 , W2 , W3 as shown in FIG. 2A , FIG. 2B and FIG. 2C . If more than two white LEDs are modulated, but all the white LEDs can only generate two kinds of white light (the first white light or the second white light), it also belongs to the scope of the present invention.

The “modulation” of multiple white light LEDs in step S10 to generate the first white light and the second white light may be the modulation of parameters such as current or pulse width of these white light LEDs to modulate the first white light and the second white light. Luminous intensity of white light respectively. Modulating the current of the white LED refers to adjusting the intensity of the current supplied to the white LED to control the luminance of the white LED. Modulating the pulse width of white LEDs refers to driving white LEDs to emit light in the form of pulse width modulation (PWM, Pulse Width Modulation), and controlling the luminous intensity by adjusting the total time that the pulse is at a high level per unit time. It is worth noting that the aforementioned modulation parameters can be selected one of them or used in combination, and the aforementioned modulation parameters are only examples, and are not intended to limit the modulation methods of the present invention. The modulation parameters and methods are all within the scope of the present invention.

The aforementioned method of modulating the current, pulse width or brightness of the white LEDs will not change the spectrum or color coordinates of the first white light or the second white light produced by the respective white LEDs, but will affect the mixed The color coordinates, color temperature and spectrum of white light change.

After the white LED is modulated in step S10 , if only the first white light and the second white light are generated as an example, please refer to FIG. 3B . In the figure, if the color coordinate of the first white light is W1, the color coordinate of the second white light is W2. Therefore, when the luminous intensity of the first white light and the second white light is adjusted, the color coordinates of the mixed light mixed in step S12 will fall on the line between W1 and W2. In this way, the purpose of light color modulation is achieved. To adapt to the needs of various applications in different occasions. In addition, since the first white light and the second white light have high color rendering properties, the mixed light also has high color rendering properties.

Please refer again to Figure 3A, again. If the step S10 produces three kinds of white light (hereinafter referred to as the first white light W1, the second white light W2, and the third white light W3). Then, after step S10 modulates a plurality of white light LEDs, the color coordinates of the mixed light mixed in step S12 will fall between the color coordinates of W1, W2, and W3 in FIG. 3A (ie, within the triangle in the diagram). By analogy, if four kinds of white light are generated in step S10, the adjustable color coordinate area of the mixed light may be larger and more flexible. At the same time, it can also meet the needs of high color rendering.

The aforementioned difference in color coordinates between the first white light and the second white light means that the color difference (Color Difference, AE) between the first white light and the second white light is greater than or equal to 0.01. Although the white light produced by the same LED chip (or the same material and process) and the same phosphor has slightly different color coordinates from a microscopic point of view, if the same LED chip is applied to step S10, it can be Adjustable light colors will be very limited, so it is not recommended. In addition, although the distances of the color coordinates of various white lights in FIG. 3A are relatively far, the present invention is not limited thereto. As long as the color coordinates are different, it shall belong to the scope of the present invention.

The "mixing" of the first white light and the second white light in step S12 can directly overlap the illumination paths of the first white light and the second white light, or mix the two by using a light guide medium. The light guiding medium may be, but not limited to, lenses and light pipes. In addition, it can also be superimposed by reflecting them on a reflective surface.

Please refer to FIG. 4 , which is a schematic flowchart of step S10 according to the first embodiment of the light color modulation method of the present invention. Step S10 includes S100: modulating one of the white LEDs to generate the first white light; and S118: modulating the other of the white LEDs to generate the second white light.

Please refer to Figure 5 for further reading. It is a schematic flowchart of the first embodiment of step S100 of the light color modulation method according to the present invention. The first embodiment of the step S100 includes S101: exciting a blue LED chip to generate a blue light; S102: passing the blue light through a fluorescent layer to generate a green light and a red light respectively; and S103: mixing the green light, the red light light and the blue light to generate the first white light.

In the first embodiment of the step S100 , how to make the blue light pass through the fluorescent layer to generate red light and green light will be described in detail later.

The spectrum of the white light generated by mixing red light, green light and blue light in step S103 may be similar to the white light shown in FIG. 2A , FIG. 2B and FIG. 2C .

Please refer to Figure 6. It is a schematic flowchart of the second embodiment of step S100 of the light color modulation method according to the present invention. The second embodiment of step S100 includes: S105: excite a blue LED chip to generate a blue light; S106: make the blue light pass through a fluorescent layer to generate a yellow light and a red light respectively; and S107: mix the yellow light, the The red light and the blue light generate the first white light.

The first white light mixed in the second embodiment of the step S100 is more obvious in the yellow light part, and weaker in the green light part. However, this situation can also be changed by properly adjusting the material, structure and composition of the fluorescent layer.

See Figure 7. It is a schematic flowchart of the third embodiment of step S100 of the light color modulation method according to the present invention. The third embodiment of step S100 includes: S109: excite a blue LED chip to generate a blue light; S110: make the blue light pass through a fluorescent layer to generate a yellow light, a green light and a red light respectively; and S111: mix the The yellow light, the green light, the red light and the blue light generate the first white light.

The mixed light color obtained in the third embodiment of step S100 has four main monochromatic lights (yellow light, green light, red light and blue light). Therefore, it is only necessary to properly adjust the ratio of each monochromatic light, and the mixed light can be obtained Better color rendering.

See Figure 8. It is a schematic flowchart of the fourth embodiment of step S100 of the light color modulation method according to the present invention. The fourth embodiment of the step S100 includes: S113: Exciting an ultraviolet (Ultraviolet, UV) LED chip to generate an ultraviolet light; S114: passing the ultraviolet light through a fluorescent layer to generate blue light, a green light, and a red light respectively light; and S115: Mix the green light, the red light and the blue light to generate the first white light.

The difference between the fourth embodiment of S100 and the first to third embodiments is that the fourth embodiment uses ultraviolet light to pass through the fluorescent layer instead of blue light to pass through the fluorescent layer. The materials of the fluorescent layers in these four embodiments are not all the same, and at the same time, the characteristics of the various monochromatic lights produced by the four embodiments are also different, as explained below:

The central wavelength of the blue light emitted by the blue LED chip used in the first to third embodiments of step S100 may be 440-490 nanometers.

The aforementioned fluorescent layer may include a light-guiding adhesive material and phosphor powder dispersed in the light-guiding adhesive material. The aforementioned fluorescent powder can generate light of specific wavelength after being excited by blue light, for example, light of green wavelength, yellow wavelength, or red wavelength.

Please refer to the table below for the materials of the aforementioned phosphors used to generate specific wavelengths. Although the material of the phosphor powder is shown in the following table as an example, it is not limited thereto.

The phosphor layer used in step S102 is able to generate green light and red light, which means that the phosphor layer contains the first phosphor and the second phosphor. Wherein the first fluorescent powder is the above-mentioned fluorescent powder that generates green light after being excited by blue light. The second phosphor is the above-mentioned phosphor that generates red light after being excited by blue light. The ratio (for example weight percentage) of the first phosphor powder and the second phosphor powder in the phosphor layer can be properly adjusted to obtain the required color coordinates and color rendering properties of the first white light. For example, if the ratio of the first phosphor to the entire phosphor layer is higher than that of the second phosphor, the green light of the white LED produced will be more than the red light.

The weight percentages of different phosphor powders in the entire phosphor layer in the above embodiments are not limited to a specific ratio, but can be adjusted according to the color coordinates and color rendering required by the user. Even if the weight percentages of the phosphors in the two white LEDs are set to be the same, the color coordinates of the light emitted by the two white LEDs may be different due to the position of each phosphor in the phosphor layer. For example: if the ratio of the first phosphor to the second phosphor is the same, but the first phosphor of the first white LED is mostly located in the main light emitting area of the blue LED chip (also called near the position of the optical axis of the light), while the second white LED The position of the first phosphor of the LED is far away from the main light-emitting area of the blue LED chip. In this way, the first phosphor of the first white LED will be excited by more blue light, while the second phosphor of the second white LED will be excited by more blue light. It will only be excited by less blue light. Therefore, although the ratio of the phosphor powder of the first white light LED and the second white light LED is similar, the first white light produced is not the same.

The "modulation" in the aforementioned step S10 to generate the first white light and the second white light can also be to modulate the color temperature, color coordinates or light spectrum of these white LEDs to produce different Color coordinates, first white light or second white light with different color rendering properties. The method of modulating its color temperature, color coordinates or light spectrum is the same as adjusting the ratio, location, and distribution of phosphor powder in its phosphor layer.

The spectral ranges of the first white light and the second white light are between 400nm and 850nm. And the first white light LED and the second white light LED are respectively modulated, and the color temperature changes of the first white light and the second white light generated by them are respectively less than 200K.

The material of the fluorescent layer corresponding to the aforementioned ultraviolet light is different from that of the fluorescent layer corresponding to blue light. In the fourth embodiment of step S100 , the fluorescent layer includes a light guiding colloid and phosphor powder dispersed on the light guiding colloid. Please refer to the above table for the material of this phosphor, so it will not be repeated here. Wherein the first fluorescent powder, the second fluorescent powder and the third fluorescent powder are excited by ultraviolet light to generate red light, green light and blue light. The proportion of the aforementioned fluorescent powder used for ultraviolet light in the entire fluorescent layer can also be adjusted according to needs, so as to obtain predetermined color coordinates, color temperature, color rendering or spectrum. The modulation method is the same as before, and will not be repeated here.

Although the first, second, third and fourth embodiments of step S100 are used to illustrate the method of generating the first white light, they can also be applied in step S118 to generate and modulate the second white light.

Although the aforementioned first white light and second white light are produced by first emitting a monochromatic light with a monochromatic LED chip, after that, the monochromatic light is used to excite the fluorescent layer to generate light of other light colors, and then each light color generated by mixing, but the method of generating the first white light and the second white light is not limited to the method of mixing white light. The first white light and the second white light mentioned above can also be directly modulated and generated by the white LED chip.

Next, please refer to FIG. 9 . It is a schematic diagram of the first additional flowchart of the first embodiment of the light color modulation method according to the present invention. The first embodiment of the aforementioned light color modulation method may further include S14: modulating at least one broadband monochromatic LED to generate at least one broadband monochromatic light; and S16: mixing the at least one broadband monochromatic light, the first White light and second white light.

See Figure 10. Step S14 includes S140 generating an ultraviolet light; and S142: passing the ultraviolet light through a fluorescent layer to generate the at least one broad-spectrum monochromatic light.

The ultraviolet light generated in step S140 is the ultraviolet light generated by modulating the UV LED chip. This ultraviolet light passes through the phosphor layer with only monochromatic phosphors, which will generate monochromatic light with a wide spectrum. The single-color phosphor used in step S142 may be, but not limited to, the phosphor described in the fourth embodiment of step S100.

The wide-spectrum monochromatic light in step S14 can also be produced by a combination of a blue light chip and a fluorescent layer. For example, fluorescent powder that can generate yellow light is fully dispersed in the fluorescent layer, and the blue light emitted by the blue chip passes through the fluorescent layer and is completely converted and absorbed to produce yellow light. This yellow light can be used as the wide-spectrum single Shade. To give another example, if the YaG component in the fluorescent layer is increased so that the blue light emitted by the blue chip is fully absorbed by YaG, the wide-spectrum monochromatic light in step S14 can be achieved by using the blue-ray chip. Although this kind of wide-spectrum monochromatic light Two peaks can be seen on its spectrum diagram, but what the naked eye sees belongs to yellow light, which also belongs to the wide-spectrum monochromatic light in step S14.

Please refer to Figure 11 for continued. The first embodiment of the aforementioned light color modulation method may further include S18: modulating a monochromatic LED to generate a monochromatic light; and S19: mixing the monochromatic light, the first white light and the second white light. The monochromatic LED in step S18 refers to modulating the monochromatic LED chip to generate the monochromatic light. The single-color LED chip can be, but not limited to, a red LED chip, a blue LED chip, or a green LED chip.

This monochromatic light is not the same as the aforementioned broad-spectrum monochromatic light. The monochromatic light refers to the monochromatic light emitted by the monochromatic LED chip directly excited (modulated). For example, light generated by excitation of red LED chips, blue LED chips, and green LED chips. Broad-spectrum monochromatic light refers to the broad-spectrum monochromatic light (including the monochromatic light of the monochromatic LED chip and the excited light) generated by the ultraviolet light generated by exciting the UV LED chip through the fluorescent layer. Therefore, the central wavelength range of broadband monochromatic LEDs is between 400nm and 850nm. The half-wave width (FWHM, Full Width At Half Maximum) of the broadband monochromatic light can be greater than or equal to 20 nanometers, preferably greater than or equal to 25 nanometers, and most preferably greater than or equal to 30 nanometers. In contrast, the half-wave width of monochromatic light is about 10 nanometers. Therefore, by mixing the above-mentioned monochromatic light or wide-spectrum monochromatic light with the first and second white lights, the range of adjustable color coordinates and color temperature can be greatly increased, and the flexibility and space of light color adjustment can be increased.

In addition, since the wide-spectrum monochromatic light has a larger half-wave width, when it is mixed with the first white light and the second white light, the continuity of its spectrum can be increased, and the color rendering property can be improved.

The second embodiment of the light color modulation method

Next, according to the second embodiment of the light color modulation method of the present invention, please refer to FIG. 12 . The second embodiment of the light color modulation method includes: S20: modulating a plurality of wide-spectrum monochromatic LEDs to generate at least one first wide-spectrum monochromatic light and a second wide-spectrum monochromatic light; and S22: mixing the first wide-spectrum monochromatic light Broad-spectrum monochromatic light and the second broad-spectrum monochromatic light. Wherein the half-wave width of the first broad-spectrum monochromatic light and the second broad-spectrum monochromatic light is greater than or equal to 20 nanometers (nm), and the color coordinates of the first and second broad-spectrum monochromatic lights are different.

The method of "modulating" multiple wide-spectrum single-color LEDs in step S20 is the same as the previous description, including modulating the current, pulse width, frequency spectrum, color temperature or brightness of the wide-spectrum single-color LEDs. After the first and second wide-spectrum monochromatic lights are modulated and mixed, the color coordinates can be obtained on the line between the respective color coordinates of the first and second wide-spectrum monochromatic lights. In addition, since the half-wave width of broad-spectrum monochromatic light is larger than that of general monochromatic light, the spectrum continuity and color rendering after modulation are also better.

The step of modulating a plurality of wide-spectrum monochromatic LEDs in S20 can also generate three kinds of wide-spectrum monochromatic lights (that is, generate first, second, and third wide-spectrum monochromatic lights). Moreover, the half-wave widths of the three broad-spectrum monochromatic lights are all greater than or equal to 20 nanometers, and their color coordinates are different. Therefore, by modulating a plurality of wide-spectrum monochromatic LEDs and mixing the light, the color coordinates of the mixed light can be properly adjusted between the color coordinates of the first, second and third wide-spectrum monochromatic lights .

Please refer to FIG. 13 , which is a schematic flowchart of step S20 of the light color modulation method according to the present invention. The step S20 of modulating a plurality of broadband monochromatic LEDs includes S200: modulating one of the broadband monochromatic LEDs to generate the first broadband monochromatic light; and S202: modulating the broadband monochromatic LEDs another to produce the second broad-spectrum monochromatic light.

The implementation manners of steps S200 and S202 are the same as those of the aforementioned step S14, so details are not repeated here.

The above-mentioned embodiments utilize two or more broadband monochromatic lights of different light colors, and by changing the brightness, current, frequency spectrum, color temperature or coordinates of the broadband monochromatic lights of different light colors, modulate a broadband The light color within the coordinate range of the monochromatic light spectrum is used to achieve the LEDs light source system with variable light color.

The wide-band spectrum monochromatic light used in this embodiment is that UVLED excites monochromatic light phosphors (R, G, B powders) to achieve wide-band spectrum monochromatic light, and the spectral width can be adjusted by the selection of phosphor powder, and the current can be used to When adjusting the luminous brightness, since the UV LED itself does not participate in light mixing, when the current is used to adjust the luminous intensity of the broadband monochromatic light, the luminous wavelength will not shift due to the generation of current or heat, and the luminous emission can be avoided. The problem of wavelength shift.

The first embodiment of light-color-variable light-emitting diode light source module

Furthermore, please read it in conjunction with Figure 14. It is a structural schematic diagram of the first embodiment of the LED light source module with variable light color.

The LED light source module 60 with variable light color includes a first white LED 62, a second white LED 64, and a control unit 66.

The first white LED 62 is activated to generate first white light. The color rendering of the first white light is greater than 85. The second white light LED 64 is activated to generate a second white light. The second white light is mixed with the first white light. The color rendering of the second white light is greater than 85. The color coordinates of the first white light are different from the color coordinates of the second white light. The control unit 66 is used to activate the first white LED 62 and the second white LED 64 respectively.

The first white LED 62 includes a substrate 620, a blue LED chip 622, and a fluorescent layer 624. The substrate 620 has a carrier cup 621 . The blue LED chip 622 is disposed in the carrying cup 621 and used to be excited to generate blue light. After the blue light is emitted from the blue LED chip 622 , it penetrates into the fluorescent layer 624 .

The phosphor layer 624 includes a light guide gel 625 , a first phosphor 626 , and a second phosphor 627 . The light guide colloid 625 is for blue light to pass through. The first phosphor powder 626 and the second phosphor powder 627 are dispersed in the light guide gel 625 . After the first fluorescent powder 626 is excited by the blue light, it will generate green light. The second fluorescent powder 627 will generate red light after being excited by blue light. Therefore, after the blue light passes through the fluorescent layer 624 , it excites the first fluorescent powder 626 and the second fluorescent powder 627 to generate green light and red light respectively. The green light and the red light are mixed with the blue light to form the aforementioned first white light.

The aforementioned substrate 620 may be a lead frame.

The second white LED 64 includes a substrate 640, a blue LED chip 642, and a fluorescent layer 644. The substrate 640 has a carrier cup 641 . The blue LED chip 642 is disposed in the carrier cup 641 and used to be excited to generate blue light and penetrate into the fluorescent layer 644 .

The phosphor layer 644 of the second white LED 64 is similar to the phosphor layer 624 of the first white LED 62. The difference lies in the material, weight percentage, or way of spreading the first phosphor 646 and the second phosphor 647 of the second white LED 64 in the light guide gel 645 and the first phosphor 626 and the second phosphor of the first white LED 62. The phosphor powder 627 is at least partly different in material, weight percentage, or dispersed in the light guide glue 625 . For example: the materials of the first and second phosphors 646, 647 of the second white LED 64 can generate yellow light and red light after the blue light generated by the blue chip 642 passes through the fluorescent layer 644. After the yellow light, red light and blue light are mixed, the second white light is produced. Therefore, the color coordinates of the second white light are different from those of the first white light.

Although the examples of the first white LED 62 and the second white LED 64 are as above, they are not limited thereto. Any white light capable of producing a color rendering greater than 85 falls within the scope of the present invention. For example, if the material selected for the fluorescent layer of the first white LED 62 can produce yellow light, green light and red light after being excited by a blue light chip, and the color rendering property after mixing can be greater than 85, which can also achieve the purpose of the present invention.

The aforementioned "mixing" of the first white light and the second white light can be achieved by adjusting the light emission angles of the first white light LED 62 and the second white light LED 64. Or it can be accomplished by a reflector, a light guiding component (such as a light pipe), or a lens.

The first white light LED 62 shown in Figure 14 and the second white light LED 64 are represented by two components separated from each other, but they can also be implemented in the form of a single component. For example, the aforementioned blue LED chips 622, 642 are respectively arranged on the same substrate and cover their corresponding fluorescent layers 624, 644 respectively. In other words, with at least two chips located in a single package, the control unit provides different Current or pulse width or current and pulse width to change the luminous intensity of the first white light or the second white light to achieve different color coordinates; or through the selection of phosphor material in the corresponding phosphor layer, weight percentage, and distribution in the light guide The position of the medium is changed to change its color temperature, color coordinates and frequency spectrum to achieve different color coordinates, and then mixing the first white light and the second white light can also achieve the effect of the present invention.

According to the actual design results, four chips can be placed in the same package. Among them, the chip type can be a blue light chip or a UV chip. The first white light, the second white light, the third white light, and the fourth white light, wherein, the selection of phosphor material is as above, so it will not be repeated. Alternatively, the light emitted by the chip can also excite the phosphors in the corresponding fluorescent layer to form a first red light, a second red light, a green light, and a blue light with different color temperatures, and mix these lights to reach the color temperature. Adjustable effect; or let the light emitted by the chip excite the phosphor in the corresponding fluorescent layer, which can form a first green light, a second green light, a blue light, and a red light with different color temperatures. Mix to achieve the effect of adjustable color temperature; or let the light emitted by the chip excite the phosphor in the corresponding fluorescent layer to form a red light, a green light, a blue light and a white light with different color temperatures, and mix these lights to achieve The effect of adjustable color temperature.

The aforementioned control unit 66 provides the electric energy required to drive the blue LED chips 642 and 622 respectively. For example, the control unit 66 can output continuous direct current to the blue LED chips 642, 622 and control the magnitude of the respective currents to achieve the purpose of modulation. Alternatively, the control unit 66 outputs pulse-width-modulated currents to the blue LED chips 642, 622 to properly control the luminance of the first white light and the second white light, and obtain predetermined color coordinates, color temperature or color rendering.

The second embodiment of light-color-variable light-emitting diode light source module

Please refer to FIG. 15 , which is a schematic structural view of the second embodiment of the LED light source module with variable light color according to the present invention. It can be seen in the figure that the LED light source module 70 with variable light color includes a first white LED 72, a second white LED 74, a wide-spectrum monochromatic LED 78 and a control unit 76.

The structure of the second embodiment of the LED light source module with variable light color is similar to that of the first embodiment, the difference lies in (a) the detailed structure of the first white LED 72 and the second white LED 74, and (b) the second implementation The example adds a wide spectrum monochrome LED 78.

The first white LED 72 of the second embodiment includes a substrate 720, a blue LED chip 722 and a fluorescent layer 724. The phosphor layer 724 includes a light guide gel 728 , a first phosphor 725 , a second phosphor 726 , and a third phosphor 727 . The blue LED chip 722 emits blue light after being excited by the control unit 76 . After the blue light passes through the fluorescent layer 724, the first, second, and third phosphors 725, 726, 727 are respectively excited to generate red light, yellow light, and green light. The red light, yellow light, green light, and blue light are mixed to produce the first white light.

The materials of the fluorescent powders 725, 726, 727 that can be excited by blue light to generate red light, yellow light, and green light have been mentioned above and will not be repeated here.

The second white LED 74 includes a substrate 740, a UV LED chip 742, and a fluorescent layer 744. The phosphor layer 744 includes a light guide gel 748 , a first phosphor 745 , a second phosphor 746 and a third phosphor 747 . The UV LED chip 742 is excited by the control unit 76 to generate ultraviolet light. The ultraviolet light passes through the fluorescent layer 744 and excites the first, second and third phosphors 745, 746, 747 respectively to generate red light, green light and blue light. After the red light, green light and blue light are mixed, the second white light is generated.

The control unit 76 can adjust the color coordinate and color rendering of the mixed light by properly adjusting the first white LED 72 and the second white LED 74. The method and principle of light mixing are the same as the above-mentioned embodiment of the light color modulation method, so it will not be repeated here.

The wide-spectrum monochromatic LED in the second embodiment includes a substrate 780, a UV LED chip 782 and a fluorescent layer 784. The phosphor layer 784 includes a light guide colloid 786 and a fourth phosphor 785 . The fourth phosphor 785 is excited by the ultraviolet light generated by the UV LED chip 782 to emit a wide-spectrum monochromatic light. The wide-spectrum monochromatic light is mixed with the first white light and the second white light to generate mixed light. The light color (color coordinate), color temperature or color rendering of the mixed light can be adjusted appropriately by the control unit 76 to reach the default value.

The material of the fourth phosphor is the same as that of any phosphor material in the fourth embodiment of step S100 described above, and will not be repeated here.

Finally, the second embodiment may additionally include a single-color LED, and the material of the single-color LED may be the same as that of the single-color LED in the aforementioned step S18. Still can achieve the purpose of variable light color.

The third embodiment of light-color-variable light-emitting diode light source module

Next, please refer to FIG. 16 , which is a schematic structural diagram of a third embodiment of an LED light source module with variable light color according to the present invention. The LED light source module 80 with variable light color includes a first wide-spectrum monochromatic LED 82, a second wide-spectrum monochromatic LED 84, and a control unit 86.

The first wide-spectrum monochromatic LED 82 is activated by the control unit 86 to generate a first broad-spectrum monochromatic light. The second broadband monochromatic LED 84 is activated by the control unit 86 to generate a second broadband monochromatic light, which is mixed with the first broadband monochromatic light.

The first wide-spectrum monochromatic LED 82 includes a substrate 820, a UV LED chip 822 and a first fluorescent layer 824. The first phosphor layer 824 includes a light guide colloid 825 and a first phosphor powder 826 . After the first phosphor 826 is excited by the ultraviolet light emitted by the UV LED chip 822, it will generate the first broad-spectrum monochromatic light.

The UV LED chip 842 of the second broadband monochrome LED 84 is disposed on the substrate 840. The second phosphor layer 844 includes a light guide colloid 845 and a second phosphor powder 846 . The ultraviolet light generated by the UV LED chip 842 passes through the second fluorescent powder 846 of the second fluorescent layer 844 to generate second wide-spectrum monochromatic light. The color coordinates of the second broad-spectrum monochromatic light are different from those of the first broad-spectrum monochromatic light. Therefore, when the control unit 86 modulates the first and second wide-spectrum monochromatic LEDs 82 and 84 respectively, the color coordinates of the mixed light will fall on the line of the first and second wide-spectrum monochromatic light color coordinates.

The half-wave width of the aforementioned first and second broad-spectrum monochromatic light is greater than or equal to 20 nanometers, preferably greater than or equal to 25 nanometers, most preferably greater than or equal to 30 nanometers. The central wavelength range of the first and second broad-spectrum monochromatic light is between 400 nanometers and 850 nanometers. Therefore, the color rendering of the mixed light will be better than the prior art.

The material of the aforementioned first and second phosphors 826, 846 can be any phosphor material as in the fourth embodiment of the above step S100, so details are not repeated here.

The ultraviolet light generated by the aforementioned UV LED chips 742, 782, 822, 842 may be but not limited to ultraviolet light, near ultraviolet light or deep ultraviolet light.

The fourth implementation example of light-color-variable light-emitting diode light source module

Please read it in conjunction with Figure 17. FIG. 17 is a schematic structural diagram of a fourth embodiment of a light-color-variable LED light source module according to the present invention. 14, FIG. 15 and FIG. 16 in the above embodiments place a light-emitting chip on a single substrate and then package it. However, in FIG. 17, multiple light-emitting chips are arranged on a single substrate (or carrier) The implementation scope for encapsulation. It can be seen from FIG. 17 that this embodiment includes a substrate 52 , a first monochromatic LED chip 520 , a second monochromatic LED chip 522 , a third monochromatic LED chip 524 , a fourth monochromatic LED chip 526 and a control unit 56 . The first, second, third, and fourth single-color LED chips 520, 522, 524, and 526 can optionally have fluorescent layers respectively (due to viewing angles, no numbering is indicated). And the fluorescent layer further has at least one kind of the above-mentioned fluorescent powder (due to the viewing angle, so the numbers are not marked). For example, the monochromatic light (which may be visible light or UV light) emitted by the aforementioned first, second, third and fourth monochromatic LED chips 520, 522, 524, 526 can pass through the fluorescent layer and be mixed to produce color temperature adjustable LED chips. white light.

The monochromatic light (which can be visible light or UV light) emitted by the aforementioned first, second, third and fourth monochromatic LED chips 520, 522, 524, 526 can be selectively passed through the fluorescent layer to generate four kinds of light respectively. There can be various combinations of these four kinds of light, depending on the selection of the single-color LED chips 520, 522, 524, 526 and the phosphor powder in the phosphor layer. For example, the four light rays can be but not limited to (A) the four aforementioned white lights, (B) the first red light, the second red light, green light, and blue light, (C) red light, the first green light, Second green light, and blue light, (D) red light, green light, blue light and white light.

How to select the single-color LED chips 520, 522, 524, 526 and phosphors has been mentioned above and will not be repeated here.

In addition, it can be seen from FIG. 17 that the first, second, third, and fourth single-color LED chips 520, 522, 524, and 526 are arranged in an array, but it is not limited thereto. Shape or any other shape configuration or arrangement.

Implementation example of light-color-variable light-emitting diode light source module application

Finally, see Figure 18. It is a structural schematic diagram of an LED light source module with variable light color applied to a lamp according to the present invention. The lamp 40 includes a lamp body 42 and LED light source modules 44a, 44b with variable light colors. The lamp 40 can be a fixed lamp or a movable lamp. The fixed light fixture can also be an indoor fixed light fixture or an outdoor fixed light fixture. Indoor fixed luminaires may be, but are not limited to, recessed, ceiling, spot or wall luminaires. Outdoor fixed lamps can be but not limited to projection lamps, floor lamps, or wall lamps. Portable light fixtures can be flashlights or lights.

The LED light source modules 44a, 44b with variable light color may adopt the light source modules of the above-mentioned first, second, third, or fourth embodiments. In short, two white-light-mixed color-variable LED light source modules 44a, 44b can be used, or two wide-spectrum monochromatic lights are mixed, or at least one wide-spectrum monochromatic light plus white light is mixed. In addition, although multiple LED light source modules 44a, 44b with variable light color are used in FIG. The specific LED light source module depends on the actual application requirements.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (39)

1. a photochromic modulator approach is characterized in that, this method comprises:

The a plurality of white light LEDs of modulation are to produce at least one first white light and one second white light, and the color rendering of this first white light and this second white light is more than or equal to 85, and the chromaticity coordinates of this first white light is different from the chromaticity coordinates of this second white light; And

Mix this first white light and this second white light.

2. modulator approach according to claim 1 is characterized in that, a plurality of white light LEDs of described modulation are the electric current of those white light LEDs of modulation or pulse width parameter one at least with the step that produces at least one first white light and one second white light.

3. modulator approach according to claim 1 is characterized in that, the aberration of this first white light and this second white light is greater than 0.01.

4. modulator approach according to claim 1 is characterized in that, the color rendering of this first white light or this second white light is greater than 95.

5. modulator approach according to claim 1 is characterized in that, a plurality of white light LEDs of described modulation comprise with the step that produces at least one first white light and one second white light:

One of those white light LEDs of modulation are to produce this first white light; And

Another of those white light LEDs of modulation is to produce this second white light.

6. modulator approach according to claim 5 is characterized in that, one of described those white light LEDs of modulation comprise with the step that produces this first white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a green glow and a ruddiness respectively; And

Mix this green glow, this ruddiness and this blue light to produce this first white light.

7. modulator approach according to claim 5 is characterized in that, one of described those white light LEDs of modulation comprise with the step that produces this first white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a gold-tinted and a ruddiness respectively; And

Mix this gold-tinted, this ruddiness and this blue light to produce this first white light.

8. modulator approach according to claim 5 is characterized in that, one of described those white light LEDs of modulation comprise with the step that produces this first white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a gold-tinted, a green glow and a ruddiness respectively; And

Mix this gold-tinted, this green glow, this ruddiness and this blue light to produce this first white light.

9. modulator approach according to claim 5 is characterized in that, one of described those white light LEDs of modulation comprise with the step that produces this first white light:

Excite a ultraviolet leds chip to produce a ultraviolet light;

Make this ultraviolet light by a fluorescence coating with produce respectively blue light, a green glow, with a ruddiness; And

Mix this green glow, this ruddiness and this blue light to produce this first white light.

10. modulator approach according to claim 5 is characterized in that, another of described those white light LEDs of modulation comprises with the step that produces this second white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a green glow and a ruddiness respectively; And

Mix this green glow, this ruddiness and this blue light to produce this second white light.

11. modulator approach according to claim 5 is characterized in that, another of described those white light LEDs of modulation comprises with the step that produces this second white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a gold-tinted and a ruddiness respectively; And

Mix this gold-tinted, this ruddiness and this blue light to produce this second white light.

12. modulator approach according to claim 5 is characterized in that, another of described those white light LEDs of modulation comprises with the step that produces this second white light:

Excite a blue-light LED chip to produce a blue light;

Make this blue light by a fluorescence coating to produce a gold-tinted, a green glow and a ruddiness respectively; And

Mix this gold-tinted, this green glow, this ruddiness and this blue light to produce this second white light.

13. modulator approach according to claim 5 is characterized in that, another of described those white light LEDs of modulation comprises with the step that produces this second white light:

Excite a ultraviolet leds chip to produce a ultraviolet light;

Make this ultraviolet light by a fluorescence coating with produce respectively blue light, a green glow, with a ruddiness; And

Mix this green glow, this ruddiness and this blue light to produce this second white light.

14. modulator approach according to claim 1 is characterized in that, other comprises:

At least one wide spectrum monochromatic LED of modulation is to produce at least one wide spectrum monochromatic light; And

Mix this at least one wide spectrum monochromatic light, this first white light and second white light.

15. modulator approach according to claim 14 is characterized in that, the monochromatic step of at least one wide spectrum of described generation comprises:

Produce a ultraviolet light; And

Make this ultraviolet light pass through a fluorescence coating to produce this at least one wide spectrum monochromatic light.

16. modulator approach according to claim 1 is characterized in that, other comprises:

Modulation one monochromatic LED is to produce a monochromatic light; And

Mix this monochromatic light, this first white light and second white light.

17. a photochromic modulator approach is characterized in that, comprises:

The a plurality of wide spectrum monochromatic LEDs of modulation are to produce at least one first wide spectrum monochromatic light and one second wide spectrum monochromatic light, this first wide spectrum monochromatic light and the monochromatic half-wave of this second wide spectrum are wider than or equal 20 nanometers, and the monochromatic chromaticity coordinates of this first wide spectrum is different from the monochromatic chromaticity coordinates of this second wide spectrum; And

Mix this first wide spectrum monochromatic light and this second wide spectrum monochromatic light.

18. modulator approach according to claim 17, it is characterized in that a plurality of wide spectrum monochromatic LEDs of described modulation are to produce electric current that at least one first wide spectrum monochromatic light and the monochromatic step of one second wide spectrum are those wide spectrum monochromatic LEDs of modulation or pulse width parameter one at least.

19. modulator approach according to claim 17 is characterized in that, this first wide spectrum monochromatic light or the monochromatic half-wave of this second wide spectrum are wider than or equal 25 nanometers.

20. modulator approach according to claim 17 is characterized in that, a plurality of wide spectrum monochromatic LEDs of described modulation are to produce at least one first wide spectrum monochromatic light and the monochromatic step of one second wide spectrum comprises:

One of those wide spectrum monochromatic LEDs of modulation are to produce this first wide spectrum monochromatic light; And

Another of those wide spectrum monochromatic LEDs of modulation is to produce this second wide spectrum monochromatic light.

21. modulator approach according to claim 20 is characterized in that, one of those wide spectrum monochromatic LEDs of described modulation comprise to produce the monochromatic step of this first wide spectrum:

Produce a ultraviolet light; And

Make this ultraviolet light by a fluorescence coating to produce this first wide spectrum monochromatic light.

22. modulator approach according to claim 20 is characterized in that, another of those wide spectrum monochromatic LEDs of described modulation comprises to produce the monochromatic step of this second wide spectrum:

Produce a ultraviolet light; And

Make this ultraviolet light by a fluorescence coating to produce this second wide spectrum monochromatic light.

23. a photochromic variable LED light-source module comprises:

One first white light LEDs is excited to produce one first white light, and the color rendering of this first white light is more than or equal to 85;

One second white light LEDs is excited to produce one second white light, and the color rendering of this second white light is more than or equal to 85, and the chromaticity coordinates of this first white light is different from the chromaticity coordinates of this second white light; And

One control unit excites this first white light LEDs and this second white light LEDs respectively.

24. light source module according to claim 23, it is characterized in that this first white light LEDs comprises a blue-light LED chip and a fluorescence coating, this fluorescence coating has a plurality of fluorescent material, this blue-light LED chip produces a blue light when being excited, this blue light by this fluorescence coating to send this first white light.

25. light source module according to claim 24 is characterized in that, this blue light produces a green glow and a ruddiness respectively during by this fluorescence coating, and this green glow, this ruddiness and this blue light produce this first white light.

26. light source module according to claim 24 is characterized in that, this blue light produces a gold-tinted, green glow and a ruddiness respectively during by this fluorescence coating, and this gold-tinted, this green glow, this ruddiness and this blue light produce this first white light.

27. light source module according to claim 24 is characterized in that, this blue light produces a gold-tinted and a ruddiness respectively during by this fluorescence coating, and this gold-tinted, this ruddiness and this blue light produce this first white light.

28. light source module according to claim 23 is characterized in that, this first white light LEDs comprises a UV led chip and a fluorescence coating, and this fluorescence coating has a plurality of fluorescent material, this ultraviolet light by this fluorescence coating to send this first white light.

29. light source module according to claim 23 is characterized in that, this second white light LEDs comprises a blue-light LED chip and a fluorescence coating, and this blue-light LED chip produces a blue light when being excited, this blue light by this fluorescence coating to send this second white light.

30. light source module according to claim 23, it is characterized in that, other comprises at least one wide spectrum monochromatic LED, and this wide spectrum monochromatic LED is excited by this control unit and produces a wide spectrum monochromatic light, and the monochromatic half-wave of this wide spectrum is wider than or equals 20 nanometers.

31. light source module according to claim 30, it is characterized in that, this at least one wide spectrum monochromatic LED comprises a UV led chip and a fluorescence coating, and this UV led chip produces a ultraviolet light when being excited, and this ultraviolet light is by this fluorescence coating and send this wide spectrum monochromatic light.

32. light source module according to claim 30 is characterized in that, the monochromatic half-wave of this wide spectrum is wider than or equals 25 nanometers.

33. a photochromic variable LED light-source module is characterized in that, comprises:

One first wide spectrum monochromatic LED is excited to produce one first wide spectrum monochromatic light;

One second wide spectrum monochromatic LED, be excited to produce one second wide spectrum monochromatic light, wherein, the half-wave of this first wide spectrum monochromatic LED and this second wide spectrum monochromatic LED is wider than or equals 20 nanometers, and the monochromatic chromaticity coordinates of this first wide spectrum is different from the monochromatic chromaticity coordinates of this second wide spectrum; And

One control unit excites this first wide spectrum monochromatic LED and this second wide spectrum monochromatic LED respectively.

34. light source module according to claim 33, it is characterized in that, this first wide spectrum monochromatic LED comprises a UV led chip and a fluorescence coating, and this UV led chip produces a ultraviolet light when being excited, and this ultraviolet light is by this fluorescence coating and send this first wide spectrum monochromatic light.

35. light source module according to claim 33, it is characterized in that, this second wide spectrum monochromatic LED comprises a UV led chip and a fluorescence coating, and this UV led chip produces a ultraviolet light when being excited, and this ultraviolet light is by this fluorescence coating and send this second wide spectrum monochromatic light.

36. light source module according to claim 33 is characterized in that, the monochromatic half-wave of this first wide spectrum is wider than or equals 25 nanometers, or the monochromatic half-wave of this second wide spectrum is wider than or equals 25 nanometers.

37. light source module according to claim 33 is characterized in that, the monochromatic half-wave of this first wide spectrum is wider than or equals 30 nanometers, or the monochromatic half-wave of this second wide spectrum is wider than or equals 30 nanometers.

38. a photochromic variable LED light-source module is characterized in that, comprises:

Substrate;

The first monochromatic LED chip, its top has one first fluorescence coating;

The second monochromatic LED chip, its top has one second fluorescence coating;

The 3rd monochromatic LED chip, its top has one the 3rd fluorescence coating;

The 4th monochromatic LED chip, its top has one the 4th fluorescence coating, and this first monochromatic LED chip, the second monochromatic LED chip, the 3rd monochromatic LED chip and the 4th monochromatic LED chip mutual encapsulation are in this substrate; And

Control unit, excite this first monochromatic LED chip, the second monochromatic LED chip, the 3rd monochromatic LED chip and the 4th monochromatic LED chip to send monochromatic light respectively, described monochromatic light is visible light or UV light, and, the monochromatic light that this first monochromatic LED chip, the second monochromatic LED chip, the 3rd monochromatic LED chip and the 4th monochromatic LED chip are sent produces four kinds of light through fluorescence coating separately, these four kinds of light are white light or wide spectrum monochromatic light, and these four kinds of light mix the back and produce white light.

39. a light fixture is characterized in that, comprises any described photochromic variable LED light-source module in one or more claims 23 to 38.

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