CN107327801A - The adjusting method of LED illumination light color temperature and the LED illumination lamp of adjustable color - Google Patents

Abstract

The invention discloses a method for adjusting the color temperature of LED lighting light and an LED lighting lamp with adjustable color temperature. The method for adjusting the color temperature of LED lighting light includes the following steps: step S1: select a blue LED light source and a fluorescent film; step S2: control the blue LED Part of the blue light emitted by the light source is in contact with the fluorescent film to produce white light; step S3: mix the white light with another part of the blue light emitted by the blue LED light source to produce LED lighting, wherein the ratio of the energy of the white light to the other part of the blue light is adjusted. The color temperature of LED lighting. According to the method for adjusting the color temperature of LED lighting light of the present invention, the realization method is simple and easy to realize.

Description

Method for adjusting color temperature of LED lighting light and LED lighting lamp with adjustable color temperature

technical field

The invention relates to the field of LED lighting, in particular to a method for adjusting the color temperature of LED lighting light and an LED lighting lamp with adjustable color temperature.

Background technique

As a light source, LED has been widely used in lighting equipment. It has the advantages of energy saving, low price, long life, and LED light source can be controlled by a single string. People's requirements for lighting sources are getting higher and higher, and the adjustable color temperature can meet people's different requirements for color attributes. For example, Europeans prefer light sources with cool color temperatures, while Asians prefer light sources with warm color temperatures. Cool-toned light sources usually give people a profound, calm, and elegant feeling; warm-toned light sources give people a warm, festive, and gentle feeling. Therefore, lighting equipment with adjustable color temperature can meet people's requirements for color temperature at different times.

At present, the usual way for the light source to achieve color temperature adjustment is to use two dimming power supplies to drive white LEDs with high and low color temperatures respectively, and adjust the color temperature of the lighting light by adjusting the driving current of the two LEDs. Although this method can realize the continuous adjustment of the color temperature of the lighting light, it requires the combination of LEDs with high color temperature and LEDs with low color temperature, which wastes the LEDs with intermediate color temperature. Therefore, it is of great significance to further simplify the manner in which the color temperature of the light source can be adjusted.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a method for adjusting the color temperature of LED lighting light, which can realize the adjustable color temperature of LED lighting light, and the method is simple and easy to implement.

The present invention also provides an LED lighting lamp with adjustable color temperature. The LED lighting lamp has a simple structure and is easy to implement.

The method for adjusting the color temperature of LED lighting light according to an embodiment of the present invention includes the following steps: step S1: selecting a blue LED light source and a fluorescent film; step S2: controlling a part of the blue light emitted by the blue LED light source to contact with the fluorescent film to generate white light; Step S3: Mix the white light with another part of the blue light emitted by the blue LED light source to produce the LED illumination light, wherein the LED is adjusted by adjusting the ratio of the energy of the white light to the other part of the blue light The color temperature of the lighting light.

According to the method for adjusting the color temperature of LED lighting light according to an embodiment of the present invention, a part of the blue light emitted by the blue LED light source is contacted with a fluorescent film to generate white light, and another part of the blue light is mixed with the white light to produce LED lighting light, and by adjusting the white light and the other part The energy ratio of blue light is used to achieve the purpose of adjusting the color temperature of the LED lighting tube, which is simple and easy to achieve.

According to some embodiments of the present invention, there is one blue LED light source, so as to simplify the driving circuit of the blue LED light source and reduce the cost.

According to some embodiments of the present invention, in step S1, the fluorescent film is covered on the first reflective object, and a second reflective object is arranged between the blue LED light source and the fluorescent film; in the step S2 Controlling another part of the blue light emitted by the blue LED light source to irradiate the second reflective object; in the step S3 , mixing the white light reflected by the first reflective object and the blue light reflected by the second reflective object. Therefore, by arranging the first reflective object and the second reflective object, the irradiation directions of the white light and another part of the blue light can be changed respectively, so that the light color distribution of the produced LED illumination light is more uniform.

According to some embodiments of the present invention, the second reflective object is provided with a light-transmitting hole so that a part of the blue light emitted by the blue LED light source passes through the light-transmitting hole and irradiates onto the fluorescent film, ensuring that a part of the blue light can pass through the light-transmitting hole. Contact with fluorescent film to generate white light.

According to some embodiments of the present invention, in step S3, the ratio of the energy of the white light to the other part of the blue light is adjusted by adjusting the irradiation area of the fluorescent film, which is simple and easy to implement.

According to some embodiments of the present invention, yellow fluorescent powder is provided on the fluorescent film, and the energy of the white light can be adjusted by adjusting the thickness and/or concentration of the yellow fluorescent powder, which is also easily realized.

The LED lighting lamp with adjustable color temperature according to the embodiment of the second aspect of the present invention includes: a blue LED light source; a first reflective object, the surface of the first reflective object facing the blue LED light source is a reflective surface, and the reflective The surface is covered with a fluorescent film; a second reflective object, the second reflective object is arranged between the blue LED light source and the fluorescent film, a part of the blue light emitted by the blue LED light source irradiates the fluorescent film and another A part of the blue light is irradiated onto the second reflective object.

According to the LED lighting lamp with adjustable color temperature according to the embodiment of the present invention, a fluorescent film is arranged on the reflective surface of the first reflective object, and the second reflective object is arranged between the blue LED light source and the fluorescent film, so that the blue LED light source emits A part of the blue light is irradiated on the fluorescent film to be reflected by the first reflective object, and another part of the blue light is irradiated on the second reflective object to be reflected by the second reflective object. The two reflected lights are mixed into the illumination light of the LED lighting lamp. By adjusting the fluorescent The ratio of the irradiation area of the film to the reflection area of the second reflective object is used to adjust the color temperature of the LED lighting lamp. The structure is simple, easy to implement, and convenient for mass production.

According to some embodiments of the present invention, the second reflective object can move relative to the fluorescent film to adjust the irradiated area of the fluorescent film, which is simple and easy to implement.

According to some embodiments of the present invention, the second reflective object is provided with a light-transmitting hole so that a part of the blue light emitted by the blue LED light source passes through the light-transmitting hole and irradiates onto the fluorescent film, ensuring that a part of the blue light can pass through the light-transmitting hole. Contact with fluorescent film to generate white light.

According to some embodiments of the present invention, the second reflective object is a mirror, which has a simple structure, is easy to implement, and has low cost.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic diagram of a method for adjusting the color temperature of LED lighting light according to an embodiment of the present invention;

2 is a schematic diagram of a method for adjusting the color temperature of LED lighting light according to another embodiment of the present invention;

3 is a schematic diagram of a method for adjusting the color temperature of LED lighting light according to another embodiment of the present invention;

4 is a schematic diagram of a method for adjusting the color temperature of LED lighting light according to yet another embodiment of the present invention;

5 is a schematic diagram of an LED lighting lamp with adjustable color temperature according to an embodiment of the present invention;

Fig. 6 is a spectrum diagram of illumination light of an LED lighting lamp with adjustable color temperature according to an embodiment of the present invention;

Fig. 7 is a diagram showing the variation of the color temperature of the illumination light of the LED lighting lamp with adjustable color temperature according to the embodiment of the present invention with the ratio of the irradiated area of the fluorescent film to the reflected area of the second reflective object.

Reference signs:

LED lights 100,

A blue LED light source 1, a first reflective object 2, a fluorescent film 3, a second reflective object 4, and a light transmission hole 40a.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "height", "upper", "lower", "left", "right", "horizontal", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, are constructed and operate in a particular orientation and therefore are not to be construed as limiting the invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The method for adjusting the color temperature of LED lighting light according to the embodiment of the first aspect of the present invention will be described below with reference to FIGS. 1-4 .

As shown in Figures 1-4, the method for adjusting the color temperature of LED lighting light according to the embodiment of the first aspect of the present invention includes the following steps:

Step S1: select blue LED light source 1 and fluorescent film 3;

Step S2: controlling a part of the blue light emitted by the blue LED light source 1 to contact the fluorescent film 3 to generate white light;

Step S3: Mix white light with another part of blue light emitted by the blue LED light source 1 to produce LED lighting, wherein the color temperature of the LED lighting is adjusted by adjusting the energy ratio of the white light and the other part of blue light.

Specifically, first, select the blue LED light source 1 and the fluorescent film 3; secondly, contact a part of the blue light emitted by the blue LED light source 1 with the fluorescent film 3, and the blue light interacts with the fluorescent film 3 to generate white light; then, combine the above white light with the blue light Another part of the blue light emitted by the LED light source 1 is mixed, and the mixed light is the LED lighting light. The purpose of adjusting the color temperature of the LED illumination light can be achieved by adjusting the energy ratio of the white light to the energy of another part of the blue light emitted by the blue LED light source 1 mixed with it. For example, under the premise of keeping the energy of the white light unchanged, increase the energy of another part of the blue light emitted by the blue LED light source 1, so that the ratio of the energy of the white light to the other part of the blue light emitted by the blue LED light source 1 decreases. At this time, the LED lighting The color temperature of the light will increase; on the contrary, reduce the energy of another part of the blue light emitted by the blue LED light source 1, so that the ratio of the energy of the white light to the other part of the blue light emitted by the blue LED light source 1 will increase. At this time, the color temperature of the LED lighting light will increase. reduce.

It can be understood that the energy ratio of the white light to the other part of the blue light can be adjusted by adjusting the energy of the white light while keeping the energy of the other part of the blue light unchanged, thereby adjusting the color temperature of the LED lighting light. Specifically, keeping the energy of the other part of the blue light unchanged and increasing the energy of the white light increases the ratio of the energy of the white light to the other part of the blue light. At this time, the color temperature of the LED lighting light will decrease; on the contrary, reducing the energy of the white light, The energy ratio of the white light to another part of the blue light is reduced, and the color temperature of the LED lighting light will increase at this time.

Of course, the energy of the white light and the energy of another part of the blue light can also be adjusted at the same time to adjust the ratio of the energy of the white light to the other part of the blue light. For example, reduce the energy of another part of blue light and increase the energy of white light at the same time, so that the energy ratio of white light to another part of blue light increases, and the color temperature of LED lighting light will decrease at this time; on the contrary, increase the energy of another part of blue light, At the same time, the energy of the white light is reduced, so that the ratio of the energy of the white light to another part of the blue light decreases, and the color temperature of the LED lighting light will increase at this time.

Thus, by contacting a part of the blue light emitted by the blue LED light source 1 with the fluorescent film 3 to produce white light, and mixing the other part of the blue light with the above-mentioned white light to produce LED illumination light, and by adjusting the energy ratio of the white light and the other part of the blue light, it is realized. The purpose of adjusting the color temperature of the LED lighting tube is simple and easy to achieve, and the light source is a blue LED light source 1. It is not necessary to consider the matching of different color light sources, and it is not necessary to select the LED light source by bin, so that it is convenient for mass production. At the same time, in mass production, the blue LED light source 1 has a single color, and the color fluctuation is small, so that the blue LED light source 1 maintains good color consistency.

According to the method for adjusting the color temperature of LED lighting light according to the embodiment of the present invention, a part of the blue light emitted by the blue LED light source 1 is contacted with the fluorescent film 3 to generate white light, and the other part of the blue light is mixed with the white light to produce LED lighting light, and by adjusting the white light and the white light The energy ratio of another part of the blue light is used to achieve the purpose of adjusting the color temperature of the LED lighting light, so as to better meet the different needs of users. The method is simple and easy to implement, and the blue LED light source 1 is convenient for mass production.

In an optional embodiment of the present invention, there is one blue LED light source 1 . For example, as shown in Figure 2, a fluorescent film 3 and a blue LED light source 1 are selected, a part of the blue light emitted by the blue LED light source 1 is in contact with the fluorescent film 3 to produce white light, and another part of the blue light is mixed with the above white light to produce the required The LED lighting light can adjust the color temperature of the LED lighting light by adjusting the energy ratio of white light and another part of blue light to meet the needs of users. Therefore, by providing one blue LED light source 1 , the driving circuit of the blue LED light source 1 can be simplified and the cost can be reduced.

It can be understood that there can be more than one blue LED light source 1, and it is only necessary to ensure that a part of the blue light emitted by the multiple blue LED light sources 1 is in contact with the fluorescent film 3 to generate white light, and the other part of the blue light is mixed with the white light. For example, as shown in Figure 3, when there are two blue LED light sources 1, the fluorescent film 3 and two blue LED light sources 1 are selected at this time, and the blue light emitted by one of the blue LED light sources 1 can be contacted with the fluorescent film 3 to generate White light, the blue light emitted by another blue LED light source 1 is mixed with the above white light to produce LED lighting light. But not limited to this.

In a specific embodiment of the present invention, in step S1, the fluorescent film 3 is covered on the first reflective object 2, and the second reflective object 4 is set between the blue LED light source 1 and the fluorescent film 3; in step S2, the control Another part of the blue light emitted by the blue LED light source 1 irradiates the second reflective object 4; in step S3, the white light reflected by the first reflective object 2 and the blue light reflected by the second reflective object 4 are mixed. Thus, by arranging the first reflective object 2 to reflect the white light, to change the irradiation direction of the white light, and setting the second reflective object 4 to reflect another part of the blue light emitted by the blue LED light source 1, to change the irradiation direction of the other part of the blue light, so that the white light and the other part of the blue light can be changed. Part of the blue light can be better mixed, so that the light color distribution of the LED lighting light is more uniform, and at the same time, the irradiation direction of the LED lighting light can be changed to better meet the practical application.

Further, the second reflective object 4 is provided with a light-transmitting hole 40a so that a part of the blue light emitted by the blue LED light source 1 is irradiated onto the fluorescent film 3 through the light-transmitting hole 40a. Specifically, the second reflective object 4 is arranged between the blue LED light source 1 and the fluorescent film 3 to separate the blue LED light source 1 and the fluorescent film 3, and the light-transmitting hole 40a penetrates along the irradiation direction of the blue light emitted by the blue LED light source 1. Both ends of the second reflective object 4, so that a part of the blue light emitted by the blue LED light source 1 can pass through the light transmission hole 40a and contact the fluorescent film 3 to generate white light, and then the white light is reflected by the first reflective object 2 to move away from the first reflective object. 2, the other part of the blue light emitted by the blue LED light source 1 is irradiated on the part of the second reflective object 4 other than the light transmission hole 40a, and the other part of the blue light is reflected to irradiate in a direction away from the second reflective object 4, This in turn mixes better with white light. Thus, by providing the light-transmitting hole 40a on the second reflective object 4, it is ensured that a part of the blue light emitted by the blue LED light source 1 can contact the fluorescent film 3 to generate white light. It can be understood that parameters such as the number and shape of the light-transmitting holes 40a can be set according to actual requirements, so as to better meet actual applications.

Of course, the light transmission hole 40a may not be provided on the second reflective object 4. At this time, the second reflective object 4 is arranged between the blue LED light source 1 and the fluorescent film 3 and does not completely isolate the blue LED light source 1 and the fluorescent film 3. Open setting, that is to say, the second reflective object 4 only blocks a part of the fluorescent film 3, so that the other part of the fluorescent film 3 can be in contact with a part of the blue light emitted by the blue LED light source 1 to generate white light, which also ensures the generation of white light .

In a further embodiment of the present invention, in step S3, the ratio of the energy of the white light to another part of the blue light is adjusted by adjusting the irradiation area of the fluorescent film 3 . That is to say, adjust the irradiation area of the fluorescent film 3, that is, adjust the energy of the above-mentioned part of the blue light emitted by the blue LED light source 1 in contact with the fluorescent film 3, thereby adjusting the energy of the white light generated after this part of blue light interacts with the fluorescent film 3, and then The energy ratio of white light and another part of blue light is adjusted to achieve the purpose of adjusting the color temperature of LED lighting light, which is simple and easy to realize.

Specifically, when the second reflective object 4 is provided with a light-transmitting hole 40a, the cross-sectional size of the light-transmitting hole 40a can be realized by a certain method, for example, a movable light shield is provided at the light-transmitting hole 40a. The shielding of the hole 40a, etc. can be adjusted. For example, reduce the cross-sectional size of the light-transmitting hole 40a, that is, reduce the irradiated area of the fluorescent film 3. At this time, the energy of a part of the blue light in contact with the fluorescent film 3 decreases, and the energy of the other part of the blue light reflected by the second reflective object 4 The energy increases, so that the energy ratio of the white light and another part of the blue light decreases, so that the color temperature of the LED lighting light will increase; increasing the cross-sectional size of the light-transmitting hole 40a, that is, increasing the irradiation area of the fluorescent film 3, at this time The energy of a part of the blue light in contact with the fluorescent film 3 increases, and the energy of the other part of the blue light reflected by the second reflective object 4 decreases, so that the ratio of the energy of the white light to the other part of the blue light increases, so that the color temperature of the LED lighting light will decrease. .

In addition, when the light transmission hole 40a is not provided on the second reflective object 4, the second reflective object 4 can move between the blue LED light source 1 and the fluorescent film 3, so that a part of the fluorescent film 3 blocked by the second reflective object 4 The area of the fluorescent film 3 changes, so that the area of the other part of the fluorescent film 3 not covered by the second reflective object 4 also changes, that is, the illuminated area of the fluorescent film 3 changes. For example, moving the second reflective object 4 increases the area of a part of the fluorescent film 3 blocked by the second reflective object 4, that is, reduces the illuminated area of the fluorescent film 3, and at this moment, the energy of a part of the blue light in contact with the fluorescent film 3 decreases. Small, the energy of another part of the blue light reflected by the second reflective object 4 increases, so that the ratio of the energy of the white light to the other part of the blue light decreases, so that the color temperature of the LED lighting light will increase; move the second reflective object 4 to make the second reflective object 4 The area of a part of the fluorescent film 3 blocked by the two reflective objects 4 decreases, that is, the irradiation area of the fluorescent film 3 is increased. At this time, the energy of a part of the blue light in contact with the fluorescent film 3 increases, and the other reflected by the second reflective object 4 The energy of a part of the blue light is reduced, so that the ratio of the energy of the white light to another part of the blue light increases, so that the color temperature of the LED lighting light will decrease.

It can be understood that when the cross-sectional size of the light-transmitting hole 40a on the second reflective object 4 cannot be adjusted, the second reflective object 4 needs to be movable between the blue LED light source 1 and the fluorescent film 3, so that the second reflective The area of a part of the fluorescent film 3 blocked by the object 4 changes, and the color temperature of the LED illumination light can also be adjusted.

Optionally, yellow fluorescent powder is provided on the fluorescent film 3, and the energy of the white light can be adjusted by adjusting the thickness and/or concentration of the yellow fluorescent powder. Since a part of the blue light emitted by the blue LED light source 1 is in contact with the fluorescent film 3, a small part of the blue light in this part of the blue light excites the yellow phosphor to emit yellow light, and the above yellow light is mixed with another small part of the blue light that does not excite the yellow phosphor And produce white light. By adjusting the thickness and/or concentration of the yellow fluorescent powder to adjust the energy of the yellow light, so as to achieve the purpose of adjusting the energy of the white light, it is also easy to achieve.

The LED lighting lamp 100 with adjustable color temperature according to the embodiment of the second aspect of the present invention will be described below with reference to FIGS. 5-7 .

As shown in FIGS. 5-7 , the LED lighting lamp 100 with adjustable color temperature according to the second embodiment of the present invention includes a blue LED light source 1 , a first reflective object 2 and a second reflective object 4 .

The surface of the first reflective object 2 towards the blue LED light source 1 is a reflective surface, the reflective surface is covered with a fluorescent film 3, the second reflective object 4 is arranged between the blue LED light source 1 and the fluorescent film 3, and the blue LED light source 1 emits A part of the blue light is irradiated on the fluorescent film 3 and another part of the blue light is irradiated on the second reflective object 4 .

For example, as shown in Figure 5, there can be one blue LED light source 1, and the blue LED light source 1 and the first reflective object 2 can be spaced left and right, and the blue LED light source 1 can be arranged on the left side of the first reflective object 2, and the reflective surface is On the left surface of the first reflective object 2, the fluorescent film 3 can cover the reflective surface, so that the light can pass through the fluorescent film 3 to irradiate the reflective surface, and be reflected by the reflective surface to change the irradiation direction of the light. The second reflective object 4 is located between the blue LED light source 1 and the fluorescent film 3, so that when the blue LED light source 1 is energized to emit light, a part of the blue light irradiated by the blue LED light source 1 to the right is irradiated on the fluorescent film 3 to generate white light, and the white light is reflected by the reflective surface Reflected and irradiated to the left, another part of the blue light is directly irradiated on the second reflective object 4 to be reflected by the second reflective object 4 and irradiated to the left, so that the white light is mixed with another part of the blue light to produce the illumination light of the LED lighting lamp 100 .

Wherein, by adjusting the ratio of the irradiation area of the fluorescent film 3 to the reflection area of the second reflective object 4 , the energy ratio of the white light to another part of the blue light can be adjusted, and then the color temperature of the illumination light of the LED lighting lamp 100 can be adjusted.

Thus, by setting the fluorescent film 3 on the reflective surface of the first reflective object 2, and setting the second reflective object 4 between the blue LED light source 1 and the fluorescent film 3, a part of the blue light emitted by the blue LED light source 1 is irradiated to the The fluorescent film 3 is reflected by the first reflective object 2 and another part of the blue light is irradiated on the second reflective object 4 to be reflected by the second reflective object 4. The two beams of reflected light are mixed into the illumination light of the LED lighting lamp 100. The ratio of the irradiation area of the film 3 to the reflection area of the second reflective object 4 is used to adjust the color temperature of the LED lighting lamp 100. The structure is simple and easy to implement, and because the light source of the LED lighting lamp 100 is only the blue LED light source 1, the color is single, It is convenient for mass production, and at the same time, the color fluctuation of the blue LED light source 1 is small during mass production, thereby ensuring good color consistency of the blue LED light source 1 .

According to the LED lighting lamp 100 with adjustable color temperature according to the embodiment of the present invention, the fluorescent film 3 is arranged on the reflective surface of the first reflective object 2, and the second reflective object 4 is arranged between the blue LED light source 1 and the fluorescent film 3 , so that a part of the blue light emitted by the blue LED light source 1 is irradiated on the fluorescent film 3 to be reflected by the first reflective object 2 and another part of the blue light is irradiated on the second reflective object 4 to be reflected by the second reflective object 4, and the two reflected lights are mixed As the illumination light of the LED lighting lamp 100, the color temperature of the LED lighting lamp 100 is adjusted by adjusting the ratio of the illuminated area of the fluorescent film 3 to the reflecting area of the second reflective object 4. The structure is simple, easy to realize, and convenient for mass production.

In order to verify that the LED lighting lamp 100 with adjustable color temperature according to the embodiment of the present invention can meet the different requirements of users for color temperature, the inventor conducted spectral analysis on the lighting light of the LED lighting lamp 100, and obtained the irradiation area of different fluorescent films 3 The spectrogram (the abscissa is the wavelength of the illumination light, and the unit is nm; the ordinate is the intensity of the illumination light, and the unit is cd) of the illumination light when the ratio of the reflective area of the second reflection object 4 (denoted as S/L), As shown in Figure 6; Simultaneously, also obtained the color temperature of illuminating light along with the change figure of the ratio of the irradiation area of fluorescent film 3 and the reflective area of second reflective object 4 (abscissa is S/L, and ordinate is illuminating light color temperature), as shown in Figure 7. As can be seen from Fig. 6, when the ratio of the illuminated area of the fluorescent film 3 to the reflective area of the second reflective object 4 changes, the spectrum of the illuminating light also changes thereupon, indicating that the color temperature of the illuminating light has changed; It can be seen directly in 7 that when the ratio of the illuminated area of the fluorescent film 3 to the reflected area of the second reflective object 4 changes, the color temperature of the illumination light also changes accordingly, and the color temperature of the illumination light varies between 5100K-12600K. Then the color of the illuminating light also changes. Here, it should be noted that the value range of S/L is not limited to the value ranges in Figure 6 and Figure 7: 0.3≤S/L≤0.7, and the value of S/L can be adjusted according to actual needs.

In some optional embodiments of the present invention, the second reflective object 4 can move relative to the fluorescent film 3 to adjust the illuminated area of the fluorescent film 3 . That is to say, the second reflective object 4 is movable between the blue LED light source 1 and the fluorescent film 3, so that the area of a part of the fluorescent film 3 blocked by the second reflective object 4 changes, so that the second reflective object 4 is not blocked The area of another part of the fluorescent film 3 also changes, that is, the irradiated area of the fluorescent film 3 changes, and the reflective area of the second reflective object 4 also changes. The ratio of the area changes, and the method is simple and easy to realize.

Specifically, the second reflective object 4 is moved to increase the area of a part of the fluorescent film 3 blocked by the second reflective object 4, that is, to reduce the illuminated area of the fluorescent film 3. At this time, the part of the blue light that is in contact with the fluorescent film 3 As the energy decreases, the reflection area of the second reflection object 4 increases, and the energy of another part of the blue light reflected by the second reflection object 4 increases, so that the ratio of the illuminated area of the fluorescent film 3 to the reflection area of the second reflection object 4 decreases. Small, the ratio of the energy of white light to another part of blue light decreases, so that the color temperature of LED lighting light will increase; move the second reflective object 4 to reduce the area of a part of the fluorescent film 3 blocked by the second reflective object 4, that is Increase the irradiation area of the fluorescent film 3, at this time, the energy of a part of the blue light in contact with the fluorescent film 3 increases, the reflection area of the second reflective object 4 decreases, and the energy of another part of the blue light reflected by the second reflective object 4 decreases , so that the ratio of the illuminated area of the fluorescent film 3 to the reflection area of the second reflective object 4 increases, and the ratio of the energy of the white light to another part of the blue light increases, so that the color temperature of the LED lighting light will decrease.

In other optional embodiments of the present invention, the second reflective object 4 is provided with a light-transmitting hole 40a so that a part of the blue light emitted by the blue LED light source 1 is irradiated onto the fluorescent film 3 through the light-transmitting hole 40a. For example, in the example of FIG. 5 , the second reflective object 4 is arranged between the blue LED light source 1 and the fluorescent film 3 to separate the blue LED light source 1 and the fluorescent film 3 , and the light transmission hole 40a is along the direction of the light emitted by the blue LED light source 1. The irradiation direction of the blue light runs through both ends of the second reflective object 4, so that a part of the blue light emitted by the blue LED light source 1 can pass through the light transmission hole 40a and contact the fluorescent film 3 to generate white light, and then the white light is reflected by the first reflective object 2 to Irradiating to the left, another part of the blue light emitted by the blue LED light source 1 is irradiated on the part of the second reflective object 4 other than the light transmission hole 40a, and the other part of the blue light is reflected to irradiate to the left, and then better mixed with white light. Thus, by providing the light-transmitting hole 40a on the second reflective object 4, it is ensured that a part of the blue light emitted by the blue LED light source 1 can contact the fluorescent film 3 to generate white light. It can also be understood that parameters such as the number and shape of the light-transmitting holes 40a can be set according to actual requirements, so as to better meet actual applications.

Furthermore, the cross-sectional size of the light transmission hole 40a can be adjusted by some means, such as setting a movable light shield at the light transmission hole 40a to shield the light transmission hole 40a. For example, reducing the cross-sectional size of the light-transmitting hole 40a, that is, reducing the irradiated area of the fluorescent film 3, the energy of a part of the blue light in contact with the fluorescent film 3 decreases, and the reflection area of the second reflective object 4 increases. The energy of another part of the blue light reflected by the second reflective object 4 increases, so that the ratio of the illuminated area of the fluorescent film 3 to the reflective area of the second reflective object 4 decreases, and the ratio of the energy of the white light to another part of the blue light decreases, so that the LED The color temperature of the illuminating light will increase; increase the cross-sectional size of the light transmission hole 40a, that is, increase the irradiation area of the fluorescent film 3, at this time, the energy of a part of the blue light in contact with the fluorescent film 3 increases, and the second reflective object 4 The reflective area decreases, and the energy of another part of blue light reflected by the second reflective object 4 decreases, so that the ratio of the illuminated area of the fluorescent film 3 to the reflective area of the second reflective object 4 increases, and the energy ratio between white light and another part of blue light As the ratio increases, the color temperature of the LED lighting light will decrease.

Certainly, when the cross-sectional size of the light transmission hole 40a on the second reflective object 4 cannot be adjusted, the second reflective object 4 can move between the blue LED light source 1 and the fluorescent film 3, so that the illuminated area of the fluorescent film 3 is the same as that of the fluorescent film 3. The ratio of the reflective area of the second reflective object 4 changes, and the color temperature of the LED lighting light can also be adjusted.

In an optional embodiment of the present invention, the second reflective object 4 is a mirror, which has a simple structure, is easy to implement, and has low cost. Of course, the second reflective object 4 can also be other objects capable of reflecting light.

Wherein, the first reflective object 2 may be a lampshade, and the first reflective object 2 may also be other objects capable of reflecting light. It can be understood that the shapes of the first reflective object 2, the fluorescent film 3, and the second reflective object 4 can be set to a structure with an arc-shaped longitudinal section and a square cross-section (for example, as shown in FIG. 5 ), etc. according to actual needs. , to better meet the practical application.

Other configurations and operations of the LED lighting lamp 100 with adjustable color temperature according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" is intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A method for adjusting the color temperature of LED lighting light, comprising the steps of: Step S1: select blue LED light source and fluorescent film; Step S2: controlling a part of the blue light emitted by the blue LED light source to be in contact with the fluorescent film to generate white light; Step S3: Mix the white light with another part of the blue light emitted by the blue LED light source to produce the LED illumination light, wherein the LED is adjusted by adjusting the ratio of the energy of the white light to the other part of the blue light The color temperature of the lighting light. 2. The method for adjusting the color temperature of LED lighting light according to claim 1, characterized in that there is one blue LED light source. 3. The method for adjusting the color temperature of LED lighting light according to claim 1, characterized in that, in step S1, the fluorescent film is covered on the first reflective object, between the blue LED light source and the fluorescent film A second reflective object is set between them; In the step S2, another part of the blue light emitted by the blue LED light source is controlled to irradiate the second reflective object; In the step S3, the white light reflected by the first reflective object and the blue light reflected by the second reflective object are mixed. 4. The method for adjusting the color temperature of LED lighting light according to claim 3, characterized in that, the second reflective object is provided with a light-transmitting hole so that a part of the blue light emitted by the blue-light LED light source passes through the light-transmitting Apertures are illuminated onto the fluorescent membrane. 5. The method for adjusting the color temperature of LED lighting light according to claim 3 or 4, characterized in that, in step S3, the energy difference between the white light and the other part of the blue light is adjusted by adjusting the irradiation area of the fluorescent film. Compare. 6. The method for adjusting the color temperature of LED lighting light according to claim 1, wherein the fluorescent film is provided with a yellow phosphor, and the white light is adjusted by adjusting the thickness and/or concentration of the yellow phosphor energy of. 7. An LED lighting lamp with adjustable color temperature, characterized in that it comprises: Blue LED light source; A first reflective object, the surface of the first reflective object facing the blue LED light source is a reflective surface, and the reflective surface is covered with a fluorescent film; A second reflective object, the second reflective object is arranged between the blue LED light source and the fluorescent film, a part of the blue light emitted by the blue LED light source irradiates the fluorescent film and another part of the blue light irradiates the first fluorescent film Two reflective objects. 8 . The LED lighting lamp with adjustable color temperature according to claim 7 , wherein the second reflective object is movable relative to the fluorescent film to adjust the irradiated area of the fluorescent film. 9. The LED lighting lamp with adjustable color temperature according to claim 7, characterized in that, the second reflective object is provided with a light-transmitting hole so that a part of the blue light emitted by the blue-light LED light source passes through the light-transmitting Apertures are illuminated onto the fluorescent membrane. 10. The LED lighting lamp with adjustable color temperature according to claim 7, characterized in that, the second reflecting object is a reflecting mirror.