TWI412784B - A modulating method for cct and a led light module with variable cct - Google Patents

Abstract

A modulating method for CCT and a LED light module with variable CCT are adapted to produce a mixed light with predetermined color coordinate (CC) or predetermined color rendering index (CRI). The LED light module includes a first broad-spectrum LED, a second broad-spectrum LED and a controller. The first and second broad-spectrum LEDs are modulated by the controller to emit a first and second broad-spectrum monochromatic lights, respectively. The FWHM of the first and the second monochromatic lights are greater than 20. The CC of the first light is different from that of the second light. The first light is mixed with the second light to product the mixed light. Accordingly, the CC of the mixed light falls on the line connecting CC of the first light with CC of the second light.

Description

LED light source device and light emitting method thereof

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.

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

Generally, the light used for illumination is mostly white light, and since a single LED chip has a narrow spectrum of light emission and cannot emit white light by itself, it is necessary to use some techniques to achieve the purpose of generating white light. There are two common methods for producing white light. A yellow light is generated by using blue light generated by a blue LED to generate yellow light, and the generated yellow light is mixed with blue light to form white light; the second is to use a red light LED, a green light LED and a blue light LED to be mixed into white light. .

Light of different light colors has different color temperatures (Color Temperature, hereinafter referred to as color temperature). For example, when the color temperature of the light source is below 3000 K, the light color begins to be reddish, giving a warm feeling; when the color temperature exceeds 5000 K The color is biased towards blue light, giving a cold feeling. Therefore, the change in the color temperature of the light source will affect the indoor atmosphere. In order to allow the user to control the color temperature of the indoor lighting, the conventional LED light color adjustable module mostly uses a red light LED, a green light LED and a blue light LED to mix light to obtain a light color variable LED module. Since the light-emitting spectrum of monochromatic LEDs is generally not wide and belongs to a narrow-spectrum light source, the white-light spectrum of the mixed light is mostly poor in 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 higher and requires a more continuous spectrum (for example, white light requires high color rendering). The use of conventional red LEDs, green LEDs, and blue LEDs to modulate the color of light does not result in a spectrum with a relatively continuous spectrum (ie, white light with high color rendering).

The invention provides a light color modulation method and a light color variable light emitting diode light source module, wherein the light modulation method generates a relatively continuous light spectrum and obtains a high color rendering white light.

In the following, "one or more", "two or more", "three or more" and "at least one" are calculated in the same number; "multiple" does not include one.

A light color modulation method according to the present invention, comprising: modulating a plurality of white light emitting diodes (LEDs) having 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 color coordinates of the first white light and the second white light are different, and the color rendering properties of the first white light and the second white light are greater than or equal to 85. Preferably, the color rendering property of at least one white light is greater than or equal to 90, and the best The condition can cause at least one white light to have a color rendering greater than 95.

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

The foregoing step of passing blue light through the phosphor layer may also be modified such that the blue light passes through the phosphor layer to respectively generate yellow light and red light, and the yellow light, the red light and the blue light are continuously mixed to generate the first white light or the second white light. In addition, the blue light may be passed through the phosphor layer to respectively generate green light, yellow light, and red light, and then the green light, the yellow light, the red light, and the blue light may be mixed to generate the first white light or the second white light.

Furthermore, the step of generating the first white light and the second white light may also be to activate an ultraviolet (UV) ultraviolet LED to generate ultraviolet light, and continue to pass the ultraviolet light through a phosphor layer to respectively generate a red light and a green light. And a blue light, and then mixing the red light, the green light and the blue light to generate the first white light or the second white light.

The foregoing light color modulation method further comprises modulating the monochromatic LED to generate a monochromatic light, and continuously mixing the monochromatic light, the first white light and the second white light, the monochromatic light being a narrow spectrum monochromatic light, or preferably The monochromatic light may be a wide-spectrum monochromatic light, which may be formed by exciting a monochromatic phosphor containing UV LEDs; or it may be formed by exciting a monochromatic phosphor containing a blue LED, wherein the blue light is completely monochromatic fluorescent Powder absorption, which is also one of the categories defined by wide-spectrum monochromatic light.

Another embodiment of the light color modulation method according to the present invention 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 mixing the first wide-spectrum monochrome Light and second wide spectrum monochromatic light. Wherein the first and second wide-spectrum monochromatic lights have a half-wave width greater than or equal to 20 nm, preferably greater than or equal to 25 nm, and most preferably greater than or equal to 30 nm, notable: when half-wave The larger the value of the width, the better the spectral continuity of the mixed light color.

According to a first embodiment of the light color variable LED light source module of the present invention, the LED light source module comprises a first white LED, a second white LED and a control unit. The first white LED is excited by the control unit to produce a first white light and its color rendering is greater than or equal to 85. The second white LED is excited by the control unit to generate a 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.

The first white LED and the second white LED may respectively include a blue LED chip and a fluorescent layer. This phosphor layer contains multiple phosphors. The blue LED chip is excited to generate blue light. When the blue light passes through the phosphor layer, the phosphor powder is excited to generate a plurality of monochromatic lights mixed with the blue light to generate the first white light or the second white light. The control unit adjusts the color coordinates or color rendering of the mixed light by modulating the current, pulse width or current and pulse width of the first and second white LEDs.

According to a second embodiment of the light color variable LED light source module of the present invention, the first white light LED, the second white light LED, the monochromatic light LED and the control unit are included. The monochromatic LED is excited by the control unit to produce a monochromatic light. The monochromatic light system is mixed with the first white light and the second white light to generate mixed light. The control unit obtains a mixed color of a predetermined color coordinate or color rendering by modulating the first white LED, the second white LED, and the monochromatic LED.

In addition to the monochromatic light mixed with the first white light and the second white light to produce mixed light, a wide-spectrum monochromatic light may also be selected. For example, the wide-spectrum monochromatic light LED includes a UV LED chip and a fluorescent layer. The phosphor layer has a phosphor, and the UV LED wafer is excited to generate an ultraviolet light. Ultraviolet light passes through the fluorescent light Layering and emitting the wide-spectrum monochromatic light, mixing 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 may also be a blue LED chip, with a monochromatic fluorescent light The powder, monochromatic phosphor completely absorbs the light emitted by the blue LED and converts it into the desired wide-spectrum monochromatic light.

A third embodiment of the light color variable LED light source module according to the present invention comprises a first wide spectrum monochrome LED, a second wide spectrum monochrome LED, and a control unit. The first wide spectrum monochromatic LED is excited by the control unit to produce a first wide spectral monochromatic light. The second wide spectrum monochromatic LED is excited by the control unit to produce a second wide spectral monochromatic light. The second wide-spectrum monochromatic light system is mixed with the first wide-spectrum monochromatic light to produce mixed light.

According to the light color modulation method and the light color variable LED light source module of the present invention, light of a predetermined color coordinate, color temperature or color rendering property can be modulated, and a mixed light of a continuous optical spectrum can be obtained.

The features and implementations of the present invention are described in detail below with reference to the drawings.

40‧‧‧Lights

42‧‧‧Light body

44a, 44b‧‧‧Light color variable LED light source module

52‧‧‧Substrate

520,522,524,526‧‧‧Monochrome LED chip

60,70,80‧‧‧Light color LED light source module

62,72‧‧‧First white LED

64,74‧‧‧second white LED

56,66,76,86‧‧‧Control unit

620, 640, 720, 740, 780, 820, 840 ‧ ‧ substrates

622,642,722‧‧‧Blue LED chip

624,644,724,744,784‧‧‧Fluorescent layer

621,641‧‧‧ Carrying Cup

625,645,728,748,786,825,845‧‧‧Light-guided colloid

626,646,725,745,826‧‧‧First fluorescent powder

627,647,726,746,846‧‧‧second phosphor powder

727, 747‧‧‧ Third phosphor powder

785‧‧‧Four Fluorescent Powder

742,782,822,842‧‧‧UV LED chip

824‧‧‧First fluorescent layer

844‧‧‧Second fluorescent layer

78,82,84‧‧‧ Wide spectrum monochrome LED

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

W1, W2, W3‧‧‧ first, second and third white light

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

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

3A and 3B are schematic views of the color coordinates of the 2A, 2B, and 2C diagrams on the CIE color map.

Figure 4 is a flow chart showing the step S10 of the first embodiment of the light color modulation method according to the present invention.

Figure 5 is a flow chart showing the first embodiment of the light color modulation method step S100 according to the present invention.

Figure 6 is a flow chart showing the second embodiment of the light color modulation method step S100 according to the present invention.

Figure 7 is a flow chart showing a third embodiment of the light color modulation method step S100 according to the present invention.

Figure 8 is a flow chart showing the fourth embodiment of the light color modulation method step S100 according to the present invention.

Figure 9 is a first additional flow chart of the first embodiment of the light color modulation method according to the present invention.

Figure 10 is a flow chart showing the step S14 of the light color modulation method according to the present invention.

Figure 11 is a second additional flow chart of the first embodiment of the light color modulation method according to the present invention.

Figure 12 is a flow chart showing the second embodiment of the light color modulation method according to the present invention.

Figure 13 is a flow chart showing the step S20 of the light color modulation method according to the present invention.

Figure 14 is a schematic view showing the structure of a first embodiment of a light-colored variable-emitting diode (LED) light source module according to the present invention.

Figure 15 is a schematic view showing the structure of a second embodiment of a light color variable LED light source module according to the present invention.

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

Figure 17 is a schematic view showing the structure of the fourth embodiment of the light color variable LED light source module according to the present invention.

Figure 18 is a schematic view showing the structure of a light-colored variable LED light source module applied to a lamp according to the present invention.

Light color modulation method first embodiment

Fig. 1 is a schematic flow chart showing the first embodiment of the 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 a 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 of the first white light and the second white light is greater than or equal to 85. Preferably, the color rendering of at least one white light is greater than or equal to 90, and the optimum state is such that the color rendering of at least one white light is 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 "2A", "2B" and "2C", which are schematic diagrams of the light spectrum of the first white light and the second white light according to the present invention. The horizontal axis in "Picture 2A" represents the wavelength in nanometers, the vertical axis is the light intensity, and the unit is the relative intensity (A.U.). It can be seen from "Fig. 2A" that this light spectrum has three main peaks 90, 92, 94, representing three different colors, respectively. The vicinity of the spectrum labeled 94 represents red light. The vicinity of the spectrum labeled 92 represents green light. The vicinity of the spectrum labeled 90 represents blue light. It can be seen from the spectrum of "Fig. 2A" that the light produced by it is white light. Among the components of the white light, the light intensity of the blue light 90 is greater than the light intensity of the green light 92. The light intensity of the green light 92 is greater than the light intensity of the red light 94. In this example, the peak intensity ratio of the three colors of red light 94, green light 92, and blue light 90 is about 1:0.6:0.46. However, the invention is not limited thereto. It can also be seen from "Phase 2A" that in the spectral range of visible light (400-780 nm), the light intensity of each wavelength is relatively continuous. The color rendering of white light in "Fig. 2A" is 94.

It can be seen in "Picture 2B" that the white light of "Picture 2B" It also has three light colors: red light 94, green light 92 and blue light 90. The difference from the "Fig. 2A" is that the light intensity of the main color light in the "B2B" spectrum is from strong to weak in order of blue light 90, red light 94, and green light 92. Although the intensity of the three light colors is different, the difference is not large. Similarly, in "B2B", the light intensity of each wavelength is relatively continuous, and the color rendering of the white light in "B2B" is measured, and the value is also 94.

In the "2Cth diagram", the light intensity of each of the main light colors of white light is from strong to weak, and is also red light 94, green light 92, and blue light 90. Among them, the light intensity of the blue light 90 and the green light 92 is very close. The light intensity of each wavelength of this white light is relatively continuous, and its color rendering property is also 94.

Please continue to refer to "3A" and "3B". It is a schematic diagram of the color coordinate positions on the CIE color chart in "2A", "2B", and "2C". The point indicating W1 in the figure is the position of the color coordinates corresponding to the white light of "2A". The point indicated by W2 in the figure is the position of the color coordinate corresponding to the white light of "2B". The point indicated by W3 in the figure is the position of the color coordinates corresponding to the white light of "2C".

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

The first white light or the second white light in the step S10 may be two types of white light W1, W2, W3 indicated in "2A", "2B" and "2C", but not limited thereto.

In step S10, the plurality of white LEDs are modulated to generate at least two or more white LEDs that are modulated by the first white light and the second white light. 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 white lights will be produced. That is, it may be three types of white light W1, W2, W3 as shown in "2A", "2B" and "2C". It is also within the scope of the invention if more than two white LEDs are modulated, but all white LEDs can only produce two white light (first white or second white).

Step S10, "modulating" a plurality of white LEDs to generate modulations in the first white light and the second white light may be modulating parameters such as current, or pulse width of the white LEDs to modulate the first white light and the second The luminous intensity of each white light. The current of the modulated white LED refers to adjusting the intensity of the current supplied to the white LED to control the luminance of the white LED. The pulse width of the modulated white LED refers to the white LED illumination driven by Pulse Width Modulation (PWM), which is controlled by adjusting the total time of the pulse to a high level per unit time. It should be noted that the foregoing modulation parameters may be selected or used in combination, and the foregoing modulation parameters are merely exemplary and are not intended to limit the modulation mode of the present invention, and may be considered or applied in the field of the prior art. The modulation parameters and methods are all applicable to the scope of the invention.

The manner of modulating the current, pulse width or brightness of the white LED does not change the spectral or color coordinates of the first white light or the second white light generated by the respective white LEDs, but will be mixed for The color coordinates, color temperature, and spectrum of the mixed 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, please refer to "3B". In the figure, if the color coordinates of the first white light are W1 and the color coordinates of the second white light are W2. Therefore, when the luminous intensities of the first white light and the second white light are modulated, the color coordinates of the mixed light mixed in step S12 will fall on the line connecting W1 and W2. In this way, the purpose of light color modulation is achieved. Adapted to the needs of a variety of 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 to "3A" again, in the same way. If the S10 step produces three kinds of white light (hereinafter referred to as first white light W1, second white light W2, and third white light W3). Then, after step S10 modulates a plurality of white LEDs, the step S12 is mixed. The color coordinates of the mixed light will fall between the color coordinates of W1, W2, and W3 in Figure 3A (ie, within the triangle of the drawing). By analogy, if four white lights are generated in step S10, the mixed light adjustable color coordinate area may be larger and more flexible. At the same time, it can also meet the needs of high color rendering.

The color coordinates of the first white light and the second white light are different from each other, and the color difference (ΔE) of the first white light and the second white light is greater than or equal to 0.01. Although the same kind of LED chip (or the same material and process) and the white light produced by the same kind of phosphor powder have a slight difference in color coordinates from the microscopic point of view, if the same LED chip is applied to step S10, The adjustable light color will be very limited and is less recommended. Further, although the distance of the color coordinates of the various white lights in "Fig. 3A" is relatively far, the present invention is not limited thereto, and it should be within the scope of the present invention as long as the conditions of the color coordinates are different.

In the step S12, the "mixing" of the first white light and the second white light may directly overlap the illumination paths of the first white light and the second white light, or may be mixed by the light guiding medium. The light guiding medium can be, but is not limited to, a lens and a light pipe. In addition, the reflective surface can also be used to reflect and overlap.

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

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

In the first embodiment of this step S100, the contents of red light and green light are generated in terms of how to enable blue light to pass through the phosphor layer, which will be described in detail later.

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

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

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

Please refer to "Figure 7." It is a schematic flowchart of the third embodiment of the light color modulation method step S100 according to the present invention. The third embodiment of step S100 includes: S109: exciting a blue LED chip to generate a blue light; S110: passing the blue light through a phosphor layer to respectively generate a yellow light, a green light, and a red light; and S111: mixing 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), so that only the proportion of each monochromatic light needs to be properly adjusted, and the mixed light can be obtained. Better color rendering.

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

The fourth embodiment of this S100 differs from the first to third embodiments in that the fourth embodiment uses ultraviolet light to pass through the phosphor layer instead of using blue light to pass through the phosphor layer. The materials of the phosphor layers of the four embodiments are not completely the same, and the characteristics of the various monochromatic lights generated by the four embodiments are also different, as explained below. With regard to the first to third embodiments of step S100, Blu-ray used The center wavelength of the blue light emitted by the LED wafer may be 440-490 nm.

The phosphor layer may comprise a light guiding glue and a phosphor powder dispersed in the light guiding glue. The aforementioned phosphor powder generates light of a specific wavelength after being excited by blue light, for example, light of a green wavelength, a yellow wavelength, or a red wavelength.

For the material of the above-mentioned phosphor powder used to generate a specific wavelength, please refer to the table below. The material of the phosphor powder is exemplified by the following table, but it is not limited thereto.

The phosphor layer used in step S102 is capable of generating green light and red light, that is, having the first phosphor powder and the second phosphor powder in the phosphor layer. The first fluorescent powder is the above-mentioned fluorescent powder which generates green light after being excited by blue light. The second phosphor is the above-mentioned phosphor which generates red light after being excited by blue light. The ratio (e.g., weight percent) of the first phosphor to the second phosphor in the phosphor layer can be suitably formulated to obtain the desired color coordinates and color rendering of the first white light. For example, if the ratio of the first phosphor to the entire phosphor layer is higher than the second phosphor, the white LED produced will have more green light than red.

The weight percentage of the different phosphors in the above embodiment to the entire phosphor layer is not limited to a specific ratio, but is adjusted according to the color coordinates and color rendering properties desired by the user. Even if the weight percentage of the phosphor powder in the two white LEDs is set to be the same, it is also possible that the color coordinates of the light emitted by the two white LEDs are different due to the different positions of the phosphor layers of the respective phosphors. difference. For example, if the ratio of the first phosphor powder to the second phosphor powder is the same, the first phosphor powder of the first white LED is mostly located in the main light exit region of the blue LED chip (which can also be called near the optical axis position), and The first fluorescent powder of the second white LED is located away from the main light exiting area of the blue LED chip, so that the first fluorescent powder of the first white LED is excited by more blue light, and the second white LED The second phosphor is only excited by less blue light. Therefore, although the ratio of the first white LED to the second white LED is similar, the first white light produced is not the same.

The "modulating" a plurality of white LEDs in the foregoing step S10 to generate "modulation" in the first white light and the second white light, and may also modulate the white light The color temperature, color coordinates or light spectrum of the light LED to produce first white light or second white light of different color coordinates, different color rendering properties. The method of modulating its color temperature, color coordinates or light spectrum is the same as adjusting the ratio or location of the phosphor in the phosphor layer, the distribution, and the like.

The spectral range of the first white light and the second white light is between 400 nm and 850 nm. And the first white LED and the second white LED are individually modulated, and the color temperature changes of the first white light and the second white light generated are less than 200K.

The material corresponding to the ultraviolet light layer and the corresponding blue light phosphor layer are different. The phosphor layer of the fourth embodiment of step S100 comprises a light guiding colloid and a phosphor powder dispersed on the light guiding colloid. The material of this phosphor powder can be found in the above table, so it will not be described again. The first phosphor powder, the second phosphor powder and the third phosphor powder are excited by ultraviolet light to generate red light, green light and blue light. The proportion of the aforementioned phosphor powder for ultraviolet light to the entire phosphor layer can also be modulated as desired to obtain a predetermined color coordinate, color temperature, color rendering or spectrum. The modulation method is the same as before, and will not be described again.

The first, second, third, and fourth embodiments of the foregoing step S100 are used to describe the manner in which the first white light is generated, but may be applied to the step S118 to generate and modulate the second white light.

The first white light and the second white light are generated by first emitting a monochromatic light with a monochromatic LED chip, and then exciting the fluorescent layer by the monochromatic light to generate light of other light colors, and then respectively coloring the respective colors. Mixed, but the first white light and the second white light are produced in a manner that is not limited by the way of mixing white light. The first white light and the second white light may also be generated by directly modifying the white LED chip.

Next, please refer to "Figure 9". It is a schematic diagram of the first additional flow of the first embodiment of the light color modulation method according to the present invention. The first embodiment of the foregoing light color modulation method may further include S14: modulating a wide-spectrum monochromatic LED to generate a wide-spectrum monochromatic light; and S16: mixing the wide-spectrum monochromatic light, the first white light, and the second White light.

Please refer to "Figure 10". Step S14 includes S140 generating an ultraviolet light; and: S142: passing the ultraviolet light through a phosphor layer to generate the wide-spectrum monochromatic light.

The ultraviolet light generated in step S140 is ultraviolet light generated by modulating the UV LED wafer. This ultraviolet light passes through a phosphor layer having only a monochromatic phosphor, which produces a wide-spectrum monochromatic light. The monochromatic phosphor of step S140 may be, but not limited to, the phosphor described in the fourth embodiment of the foregoing step S100.

The wide-spectrum monochromatic light of step S14 may also be produced by a combination of a blue light wafer and a phosphor layer. For example, a fluorescent powder capable of generating yellow light is sufficiently dispersed in the phosphor layer, and the blue light emitted by the blue light wafer is completely converted and absorbed by the fluorescent layer to generate yellow light, and the yellow light can be used as a step. S14's wide spectrum monochromatic light. As another example, if the YaG component in the phosphor layer is increased, and the blue light emitted by the blue light wafer is sufficiently absorbed by YaG, the wide-spectrum monochromatic light in the blue wafer forming step S14 can be achieved. Although the light can see two peaks on the spectrogram, it is yellow light, which is also the wide-spectrum monochromatic light of step S14.

Please refer to "Figure 11" for continued. The first embodiment of the foregoing 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 of step S18 refers to a modulated monochromatic LED wafer to produce the monochromatic light. This monochromatic LED wafer can be, but is not limited to, a red LED wafer, a blue LED wafer, or a green LED wafer.

This monochromatic light is not the same as the aforementioned wide-spectrum monochromatic light. This monochromatic light refers to the monochromatic light emitted by the monochromatic LED wafer directly excited (modulated). For example, red LED chips, blue LED chips, and green LED chips are excited to generate light. The wide-spectrum monochromatic light refers to a wide-spectrum monochromatic light (including monochromatic light and excited light of a monochromatic LED wafer) generated by passing ultraviolet light generated by excitation of a UV LED wafer through a fluorescent layer. Therefore, the wide wavelength monochromatic LED has a center wavelength ranging from 400 nm to 850 nm. The half-wave width (FWHM, Full Width At Half Maximum) of a wide-spectrum monochromatic light can be greater than or equal to At 20 nm, preferably greater than or equal to 25 nm, and most preferably greater than or equal to 30 nm. In contrast, the half-wave width of monochromatic light is about 10 nm. Therefore, by mixing the monochromatic light or the wide-spectrum monochromatic light with the first and second white lights, the range of the adjustable color coordinates and the color temperature can be greatly increased, and the elasticity and space with adjustable light color can be increased.

Further, since the wide-spectrum monochromatic light has a large half-wave width, when mixed with the first white light and the second white light, the continuity of the spectrum can be increased, and the color rendering property can be improved.

Light color modulation method second embodiment

Next, according to the second embodiment of the light color modulation method of the present invention, please refer to "Fig. 12". A second embodiment of the light color modulation method includes: S20: modulating a plurality of wide-spectrum monochrome 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 with the second wide spectrum monochromatic light. The half-wave width of the first wide-spectrum monochromatic light and the second wide-spectrum monochromatic light is greater than or equal to 20 nanometers (nm) and the color coordinates of the first and second wide-spectrum monochromatic lights are different.

The manner of "modulating" a plurality of wide-spectrum monochrome LEDs in step S20 is the same as described above, and includes the current, pulse width, spectrum, color temperature, or brightness of the modulated wide-spectrum monochrome LED. After the first and second wide-spectrum monochromatic lights are modulated and mixed, the color coordinates of the respective color coordinates of the first and second wide-spectrum monochromatic lights can be obtained. In addition, since the half-wave width of the wide-spectrum monochromatic light is larger than the half-wave width of the general monochromatic light, the spectral continuity and color rendering after modulation are also preferable.

The step of modulating a plurality of wide-spectrum monochromatic LEDs of S20 can also produce three kinds of wide-spectrum monochromatic light (that is, generating first, second, and third wide-spectrum monochromatic lights). And the half-wave widths of the three kinds of wide-spectrum monochromatic lights are greater than or equal to 20 nm and their color coordinates are different. Therefore, by modulating a plurality of wide-spectrum monochromatic LEDs and mixing them, the color coordinates of the mixed light can be appropriately adjusted between the color coordinates of the first, second, and third wide-spectrum monochromatic lights. .

Please refer to "Fig. 13", which is a light color modulation according to the present invention. Method flow diagram of step S20. Step S20: modulating the plurality of wide-spectrum monochrome LEDs includes: S200: modulating one of the wide-spectrum monochrome LEDs to generate the first wide-spectrum monochromatic light; and S202: modulating the wide-spectrum monochrome LEDs The other is to generate the second wide spectrum monochromatic light.

The implementation manners of steps S200 and S202 are the same as the foregoing step S14, and therefore will not be described again.

Light-color variable light-emitting diode light source module first embodiment

In addition, please read it in "Figure 14". It is a schematic structural view of the first embodiment of the LED light source module with variable light color.

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

The first white LED 62 is energized to produce a first white light. The color rendering of this first white light is greater than 85. The second white LED 64 is activated to produce 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 configured to excite 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 phosphor layer 624. The substrate 620 has a carrier cup 621. The blue LED chip 622 is disposed within the carrier cup 621 and is used to be excited to generate blue light. After the blue light is emitted from the blue LED chip 622, it penetrates the phosphor layer 624.

The phosphor layer 624 includes a light guiding gel 625, a first phosphor powder 626, and a second phosphor powder 627. The light-guiding colloid 625 is for blue light transmission. The first phosphor 626 and the second phosphor 627 are dispersed within the light guiding gel 625. The first phosphor 626 emits green light after being excited by blue light. The second phosphor 627 emits red light after being excited by blue light. Therefore, after the blue light passes through the phosphor layer 624, the first phosphor powder 626 and the second phosphor powder 627 are excited to generate a green light and a red light, respectively. The green light and the red light are mixed with the blue light to form the first white light.

The aforementioned substrate 620 can be a lead frame.

The second white LED 64 includes a substrate 640 and a blue LED. A wafer 642 and a phosphor layer 644. The substrate 640 has a carrier cup 641. The blue LED chip 642 is disposed within the carrier cup 641 and is used to be excited to generate blue light and penetrate into the phosphor 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 is the material of the first phosphor powder 646 and the second phosphor powder 647 of the second white LED 64, the weight percentage, or the manner of being dispersed in the light guiding colloid 645 and the first phosphor powder 626 of the first white LED 62. The material, weight percentage, or dispersion of the second phosphor 627 is at least partially different. For example, the materials of the first and second phosphors 646, 647 of the second white LED 64 may generate yellow light and red light after the blue light generated by the blue light wafer 642 passes through the fluorescent layer 644. After the yellow, red and blue light are mixed, a second white light is produced. Therefore, the color coordinates of the second white light are different from the color coordinates of the first white light.

Although the first white LED 62 and the second white LED 64 are exemplified above, they are not limited thereto. Any white light that produces a color rendering greater than 85 is within the scope of the present invention. For example, if the material selected for the phosphor layer of the first white LED 62 is yellow, green, and red after being excited by the blue light wafer, the color rendering property may be greater than 85 after mixing, and the invention can also be achieved. The purpose.

The "mixing" of the first white light and the second white light can be achieved by adjusting the light exit angles of the first white LED 62 and the second white LED 64. Or it can be done by a reflector, a light guiding element such as a light pipe, or a lens.

The first white LED 62 and the second white LED 64 shown in Fig. 14 are shown as two separate elements, but they may be implemented as a single element. For example, the foregoing blue LED chips 622, 642 are respectively disposed on the same substrate and respectively cover their corresponding fluorescent layers 624, 644, in other words, at least two wafers are located in a single package, and the control unit provides different currents by logical operation. 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 by selecting, weighting, and distributing the phosphor material in the corresponding phosphor layer The position of the medium to change its color temperature, color coordinates and spectrum The effect of the present invention can also be achieved by mixing the first white light and the second white light with different color coordinates.

According to the actual design result, the four wafers can be in the same package, wherein the wafer type can be a blue wafer or a UV wafer, and the light emitted by the wafer excites the phosphor powder in the corresponding phosphor layer, and the color temperature is different. A first white light, a second white light, a third white light, and a fourth white light, wherein the material of the phosphor powder has been selected as described above, and therefore will not be repeated. Alternatively, the light emitted by the wafer may be excited by the phosphor in the corresponding phosphor layer, and a first red light, a second red light, a green light, and a blue light having different color temperatures may be formed, and the light is mixed. The color temperature can be adjusted to change; or the light emitted by the wafer is excited to the phosphor in the corresponding phosphor layer, and a first green light, a second green light, a blue light, and a red light having different color temperatures can be formed. Mixing the light to achieve a color temperature tunable effect; or causing the light emitted by the wafer to excite the phosphor in the corresponding phosphor layer to form a red light, a green light, a blue light, and a white light having different color temperatures. The light is mixed to achieve a color temperature tunable effect.

The aforementioned control unit 66 provides the electrical energy required to drive the blue LED chips 642, 622, respectively. For example, the control unit 66 can output a continuous DC current to the blue LED chips 642, 622 and control the magnitude of the respective currents for modulation purposes. Alternatively, the control unit 66 outputs a pulse width modulated current to the blue LED chips 642, 622 to appropriately control the luminance of the first white light and the second white light, and to obtain a predetermined color coordinate, color temperature or color rendering.

Light-colored variable light-emitting diode light source module second embodiment

Please refer to FIG. 15 , which is a structural diagram of a second embodiment of a light color variable LED light source module according to the present invention. The light color variable LED light source module 70 can be seen to include a first white LED 72, a second white LED 74, a wide spectrum monochrome LED 78 and a control unit 76.

The architecture of the second embodiment of the light color variable LED light source module is similar to that of the first embodiment except that (a) the detailed structure of the first white LED 72 and the second white LED 74, and (b) the second The embodiment 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 phosphor layer 724. The phosphor layer 724 includes a light guiding gel 728, a first phosphor powder 725, a second phosphor powder 726, and a third phosphor powder 727. The blue LED chip 722 emits blue light after being excited by the control unit 76. After the blue light passes through the phosphor layer 724, the first, second, and third phosphors 725, 726, and 727 are respectively excited to generate red light, yellow light, and green light. The red, yellow, green, and blue light combine to produce a first white light.

The material of the fluorescent powder 725, 726, 727 which can be excited by blue light to generate red light, yellow light, and green light has been described above and will not be described again.

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

The control unit 76 can adjust the color coordinates and color rendering properties of the mixed light by appropriately modulating the first white LED 72 and the second white LED 74. The method and principle of the light mixing are the same as those of the above-described light color modulation method, and thus will not be described herein.

The wide-spectrum monochrome LED in the second embodiment includes a substrate 780, a UV LED chip 782, and a phosphor layer 784. The phosphor layer 784 includes a light guiding gel 786 and a fourth phosphor powder 785. This fourth phosphor 785 is excited by the ultraviolet light generated by the UV LED wafer 782 to emit a broad spectrum of monochromatic light. The wide-spectrum monochromatic light is mixed with the first white light and the second white light to generate mixed light. The color (color coordinates), color temperature or color rendering of the mixed light can be preset to a predetermined value by the appropriate modulation of the control unit 76.

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

Finally, this second embodiment may additionally comprise a monochromatic LED. The material of the monochromatic LED can be the same as the monochromatic LED of the foregoing step S18. Still achieve the purpose of variable light color.

Light-colored variable light-emitting diode light source module third embodiment

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

The first wide spectrum monochrome LED 82 is excited by control unit 86 to produce a first wide spectral monochromatic light. The second wide spectral monochromatic LED 84 is excited by control unit 86 to produce a second wide spectral monochromatic light that is mixed with the first wide spectral monochromatic light.

The first wide-spectrum monochrome LED 82 includes a substrate 820, a UV LED chip 822, and a first phosphor layer 824. The first phosphor layer 824 includes a light guiding paste 825 and a first phosphor powder 826. The first phosphor powder 826, upon being excited by the ultraviolet light emitted by the UV LED chip 822, produces a first broad spectrum monochromatic light.

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

The half-wave width of the first and second wide-spectrum monochromatic lights is greater than or equal to 20 nm, preferably greater than or equal to 25 nm, and most preferably greater than or equal to 30 nm. The center wavelengths of the first and second wide-spectrum monochromatic lights range from 400 nm to 850 nm. Therefore, the color rendering of mixed light will be superior to the conventional technology.

The material of the first and second phosphor powders 826, 846 can be selected from any of the phosphor powder materials of the fourth embodiment of the above step S100, so that it is no longer defective. Said.

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

The fourth embodiment of the light-color variable light-emitting diode light source module

Please read it in conjunction with "Figure 17". Fig. 17 is a schematic structural view showing a fourth embodiment of the light-color variable light-emitting diode light source module of the present invention. The above embodiments of "14th", "fifteenth" and "fifth" are based on a method in which a light-emitting chip is placed on a single substrate and then packaged, and "17th" is a plurality of light-emitting devices. The implementation range in which the wafer is placed on a single substrate (or carrier plate) and then packaged. As can be seen from "Fig. 17," this embodiment includes a substrate 52, a first monochromatic LED wafer 520, a second monochromatic LED wafer 522, a third monochromatic LED wafer 524, a fourth monochromatic LED wafer 526, and control. Unit 56. Optionally, each of the first, second, third, and fourth monochromatic LED wafers 520, 522, 524, 526 has a phosphor layer (not labeled by the viewing angle relationship). The phosphor layer further has at least one of the aforementioned phosphors (not labeled due to the viewing angle relationship). For example, the monochromatic light (which may be visible light or UV light) emitted by the first, second, third, and fourth monochromatic LED chips 520, 522, 524, 526 may pass through the phosphor layer and be mixed to produce white light with adjustable color temperature.

The monochromatic light (which may be visible light or UV light) emitted by the first, second, third, and fourth monochromatic LED chips 520, 522, 524, 526 may selectively pass through the phosphor layer, that is, each of the four types of light is generated. The four types of light can be combined in a variety of ways, depending on the choice of the monochromatic LED wafers 520, 522, 524, 526 and the phosphor in the phosphor layer. For example, the four types of light may be, but are not limited to, (A) four kinds of the foregoing white light, (B) first red light, second red light, green light, and blue light, (C) red light, first green light, Second green light, and blue light, (D) red light, green light, blue light, and white light.

How to select the aforementioned single-color LED chips 520, 522, 524, 526 and phosphor powder is not repeated as described above.

In addition, it can be seen in "Figure 17" that the first, second and third, The four-color LED chips 520, 522, 524, and 526 are arranged in an array, but are not limited thereto, and may be configured or arranged in a one-dimensional array, a ring shape, or any other shape.

Example of application of light-color variable light-emitting diode light source module application

Finally, please refer to "Figure 18." The utility model relates to a structural diagram of a light source variable LED light source module applied to a lamp according to the invention. The luminaire 40 includes a lamp body 42 and light color variable LED light source modules 44a, 44b. The luminaire 40 can be a stationary luminaire or a movable luminaire. The fixed luminaire can also be an indoor fixed luminaire or an outdoor fixed luminaire. Indoor stationary luminaires can be, but are not limited to, in-line lights, ceiling lights, projection lights or wall lights. The outdoor fixed luminaire can be, but is not limited to, a projection lamp, a ground lamp, or a wall lamp. The portable luminaire can be a flashlight or an illuminator.

The light source color changing LED light source modules 44a, 44b may adopt the light source module of the first, second, third or fourth embodiment described above. In short, two white light hybrid light color variable LED light source modules 44a, 44b, or two wide spectral monochromatic light blends, or at least one wide spectral monochromatic light plus white light mixing may be employed. In addition, although the plurality of light color variable LED light source modules 44a and 44b are disposed in a lamp body 42 in the "18th drawing", it is not limited thereto, and only one or two may be used in practical applications. The light color variable LED light source module depends on the needs of the actual application.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

Claims (36)

A light color modulation method, comprising: modulating a plurality of white LEDs to generate at least one first white light and a second white light, wherein the first white light and the second white light have a color rendering greater than or equal to 85, the first white light The color coordinates are different from the color coordinates of the second white light, the color difference between the first white light and the second white light is greater than 0.01; and the first white light and the second white light are mixed. The modulation method of claim 1, wherein the step of modulating the plurality of white LEDs to generate the at least one first white light and the second white light is to modulate at least one of a current or a pulse width parameter of the white LEDs. The modulation method of claim 1, wherein the color rendering of the first white light or the second white light is greater than 95. The modulation method of claim 1, wherein the step of modulating the plurality of white LEDs to generate the at least one first white light and the second white light comprises: modulating one of the white light LEDs to generate the first white light; The other of the white LEDs is modulated to produce the second white light. The modulation method of claim 4, wherein the step of modulating one of the white lights to generate the first white light comprises: exciting a blue LED chip to generate a blue light; and causing the blue light to pass through a phosphor layer to respectively generate a green light and a red light; and mixing the green light, the red light and the blue light to generate the first white light. The modulation method of claim 4, wherein the step of modulating one of the white lights to generate the first white light comprises: exciting a blue LED chip to generate a blue light; and causing the blue light to pass through a phosphor layer to respectively generate a yellow light and a red light; and mixing the yellow light, the red light and the blue light to generate the first white light. The modulation method of claim 4, wherein the step of modulating one of the white lights to generate the first white light comprises: exciting a blue LED chip to generate a blue light; and causing the blue light to pass through a phosphor layer to respectively generate a yellow light, a green light, and a red light; and mixing the yellow light, the green light, the red light, and the blue light to generate the first white light. The modulation method of claim 4, wherein the step of modulating one of the white light to generate the first white light comprises: exciting an ultraviolet (UV) LED chip to generate an ultraviolet light; and passing the ultraviolet light through a The phosphor layer respectively generates blue light, a green light, and a red light; and mixes the green light, the red light and the blue light to generate the first white light. The modulation method of claim 4, wherein the step of modulating the other of the white lights to generate the second white light comprises: exciting a blue LED chip to generate a blue light; and passing the blue light through a phosphor layer to respectively Producing a green light and a red light; The green light, the red light, and the blue light are mixed to generate the second white light. The modulation method of claim 4, wherein the step of modulating the other of the white lights to generate the second white light comprises: exciting a blue LED chip to generate a blue light; and passing the blue light through a phosphor layer to respectively Generating a yellow light and a red light; and mixing the yellow light, the red light and the blue light to generate the second white light. The modulation method of claim 4, wherein the step of modulating the other of the white lights to generate the second white light comprises: exciting a blue LED chip to generate a blue light; and passing the blue light through a phosphor layer to respectively Generating a yellow light, a green light, and a red light; and mixing the yellow light, the green light, the red light, and the blue light to generate the second white light. The modulation method of claim 4, wherein the step of modulating the other of the white lights to generate the second white light comprises: exciting an ultraviolet (UV) LED chip to generate an ultraviolet light; and passing the ultraviolet light a phosphor layer to respectively generate blue light, a green light, and a red light; and to mix the green light, the red light and the blue light to generate the second white light. The modulation method of claim 1, further comprising: modulating at least one wide-spectrum monochromatic LED to generate a wide-spectrum monochromatic light; The at least one wide spectrum monochromatic light, the first white light and the second white light are mixed. The modulation method of claim 13, wherein the step of generating at least one broad-spectrum monochromatic light comprises: generating an ultraviolet light; and passing the ultraviolet light through a phosphor layer to generate the at least one wide-spectrum monochromatic light. The modulation method of claim 1, further comprising: modulating a monochromatic LED to generate a monochromatic light; and mixing the monochromatic light, the first white light and the second white light. A light color modulation method includes: modulating a plurality of wide-spectrum monochromatic LEDs excited by a plurality of phosphors to generate at least a first wide-spectrum monochromatic light and a second wide-spectrum monochromatic light, the first broadband The half-width of the spectral monochromatic light and the second wide-spectrum monochromatic light is greater than or equal to 20 nanometers (nm), and the color coordinate of the first wide-spectrum monochromatic light is different from the second wide-spectrum monochromatic light a color coordinate; and mixing the first wide-spectrum monochromatic light with the second wide-spectrum monochromatic light. The modulation method of claim 16, wherein the step of modulating the plurality of wide-spectrum monochromatic LEDs to generate at least one of the first wide-spectrum monochromatic light and the second wide-spectrum monochromatic light is to modulate the broadband At least one of the current or pulse width parameters of the spectral monochromatic LED. The modulation method of claim 16, wherein the first wide-spectrum monochromatic light or the second wide-spectrum monochromatic light has a half-wave width greater than or equal to 25 nm. The modulation method of claim 16, wherein the step of modulating the plurality of wide-spectrum monochromatic LEDs to generate the at least one first wide-spectrum monochromatic light and the second wide-spectrum monochromatic light comprises: modulating the broadband One of the monochromatic LEDs is spectrally generated to produce the first wide-spectrum monochromatic light; and the other of the wide-spectrum monochromatic LEDs is modulated to produce the second wide-spectrum monochromatic light. The modulation method of claim 19, wherein the step of modulating one of the wide-spectrum monochromatic LEDs to generate the first wide-spectrum monochromatic light comprises: generating an ultraviolet light; and passing the ultraviolet light through a fluorescent The optical layer produces the first broad spectrum monochromatic light. The modulation method of claim 19, wherein the step of modulating the other of the wide-spectrum monochromatic LEDs to generate the second wide-spectrum monochromatic light comprises: generating an ultraviolet light; and passing the ultraviolet light through a A phosphor layer to produce the second wide spectrum monochromatic light. A light color variable light emitting diode (LED) light source module, comprising: a first white light LED, being excited to generate a first white light, the first white light having a color rendering greater than or equal to 85; a second white light The LED is excited to generate a second white light having a color rendering greater than or equal to 85, the color coordinate of the first white light being different from the color coordinates of the second white light, the first white light and the second White light The paths partially overlap, the color difference between the first white light and the second white light is greater than 0.01; and a control unit respectively excites the first white LED and the second white LED. The light source module of claim 22, wherein the first white LED comprises a blue LED chip and a phosphor layer, the phosphor layer having a plurality of phosphors, and the blue LED chip is excited to generate a blue light The blue light passes through the phosphor layer to emit the first white light. The light source module of claim 23, wherein the blue light passes through the phosphor layer to generate a green light and a red light, respectively, and the green light and the red light are mixed with the blue light to generate the first white light. The light source module of claim 23, wherein the blue light passes through the phosphor layer to generate a yellow light, a green light, and a red light, respectively, and the yellow light, the green light, and the red light are mixed with the blue light. The first white light is generated. The light source module of claim 23, wherein the blue light passes through the phosphor layer to generate a yellow light and a red light, respectively, and the yellow light and the red light are mixed with the blue light to generate the first white light. The light source module of claim 22, wherein the first white LED comprises a UV LED chip and a phosphor layer, wherein the UV LED chip is excited to generate an ultraviolet light, and the phosphor layer has a plurality of phosphors. a powder that passes through the phosphor layer to emit the first white light. The light source module of claim 22, wherein the second white LED comprises a blue LED chip and a phosphor layer, and the blue LED chip is excited A blue light is generated that passes through the phosphor layer to emit the second white light. The light source module of claim 22, further comprising at least one wide-spectrum monochromatic LED that is excited by the control unit to generate a wide-spectrum monochromatic light, the half of the wide-spectrum monochromatic light The wave width is greater than or equal to 20 nm. The light source module of claim 29, wherein the at least one wide-spectrum monochromatic LED comprises a UV LED chip and a phosphor layer, wherein the UV LED chip is excited to generate an ultraviolet light, and the ultraviolet light passes through the firefly The light layer emits the wide-spectrum monochromatic light. The light source module of claim 29, wherein the half-wave width of the wide-spectrum monochromatic light is greater than or equal to 25 nm. A light color variable light emitting diode (LED) light source module comprising: a first wide spectrum monochromatic LED excited by a plurality of phosphors, excited to generate a first wide spectrum monochromatic light; The plurality of phosphors excite one of the second wide-spectrum monochromatic LEDs to be excited to generate a second wide-spectrum monochromatic light, wherein the first wide-spectrum monochromatic LED and the second wide-spectrum monochromatic LED are half The color width of the first wide-spectrum monochromatic light is different from the color coordinate of the second wide-spectrum monochromatic light, and the first wide-spectrum monochromatic light and the second wide spectrum are greater than or equal to 20 nm. The illumination paths of the monochromatic light partially overlap; and a control unit respectively exciting the first wide spectrum monochrome LED and the second wide spectrum monochrome LED. The light source module of claim 32, the first wide-spectrum monochromatic LED comprises a UV LED chip and a phosphor layer, wherein the UV LED chip is excited to generate an ultraviolet light, and the ultraviolet light passes through the firefly The light layer emits the first wide-spectrum monochromatic light. The light source module of claim 32, wherein the second wide-spectrum monochrome LED comprises a UV LED chip and a phosphor layer, wherein the UV LED chip is excited to generate an ultraviolet light, and the ultraviolet light passes through the firefly The light layer emits the second wide-spectrum monochromatic light. The light source module of claim 32, wherein the first wide-spectrum monochromatic light has a half-wave width greater than or equal to 25 nm, or the second wide-spectrum monochromatic light has a half-wave width greater than or equal to 25 nm. The light source module of claim 32, wherein the first wide-spectrum monochromatic light has a half-wave width greater than or equal to 30 nm, or the second wide-spectrum monochromatic light has a half-wave width greater than or equal to 30 nm.