Method for adjusting light source curve of double-color-temperature lamp

Abstract

The invention discloses a method for adjusting a light source curve of a double-color-temperature lamp, and the method comprises the steps: obtaining a needed target color temperature, enabling yellow light with double color temperatures to be X, enabling white light with double color temperatures to be Y, and then inputting double-color-temperature parameters to be X1 and Y1; the green lamp beads are additionally arranged on the LED lamp panel, and the green lamp beads are used for supplementing light; the control module outputs corresponding X2, Y2 and G three-path color temperature parameters according to the received two-color temperature parameters X1 and Y1 and a color temperature table, and the G color temperature parameter is used for controlling a green lamp bead; yellow light, white light and green light are mixed to obtain a target color temperature; and three paths of color temperature control signals are output according to the received two paths of color temperature control signals, so that a third kind of light output is superposed on the original double-channel illumination effect, a double-color-temperature curve output by the original lamp is infinitely close to a black body curve, the purpose of improving and enhancing the illumination effect is achieved, a wider and more accurate color temperature adjustment range is finally realized, and the illumination effect is improved. And the illumination requirements of huge markets are met.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting, and in particular to a method for adjusting a light source curve of a dual-color temperature lamp. Background Art

[0002] The color temperature adjustment of LED lamps is to mix high color temperature lamp beads and low color temperature lamp beads, and achieve different color temperatures in different proportions. The black body color temperature curve is a curve that describes the relationship between the color and temperature of black body radiation. According to the black body radiation law, the color of black body radiation is closely related to temperature and can be described by color temperature. The color temperature is expressed in Kelvin (K) and represents the color temperature of black body radiation. According to Planck's radiation law, the energy distribution of black body radiation at different temperatures can be calculated. Discretizing the wavelength range from 400nm to 800nm ​​can obtain the black body color temperature curve. It should be noted that the black body color temperature curve is only a theoretical curve, and the actual light source is often affected by other factors, such as the luminescent material of the light source, the influence of the filter, etc. Therefore, the actual light source may have some deviations, which makes the existing LED lamp color temperature adjustment effect poor. Summary of the invention

[0003] In order to solve the defects in the prior art, the present invention provides a method for adjusting the light source curve of a dual color temperature lamp.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The present invention provides a method for adjusting a light source curve of a dual color temperature lamp, comprising the following steps:

[0006] Step 1: First, obtain the target color temperature, where the yellow light of the dual color temperature is X and the white light is Y, and then the dual color temperature parameters input are X1 and Y1;

[0007] Step 2: Add green lamp beads to the LED light board and use them for fill light;

[0008] Step 3, the control module outputs the corresponding three-way color temperature parameters X2, Y2 and G according to the color temperature table based on the received dual color temperature parameters X1 and Y1, wherein the G color temperature parameter is used to control the green lamp bead;

[0009] Step 4: Get the target color temperature by mixing yellow light, white light and green light.

[0010] As a preferred technical solution of the present invention, the method of mixing the yellow light, white light and green light to obtain the target color temperature is to take red (R), green (G) and blue (B) as the three primary colors,

[0011] Then C=c(C)=r(R)+g(G)+b(B)

[0012] In the formula, r, g, and b are called the tristimulus values ​​of color C.

[0013] In the visible light range of 380-780nm, a series of color matching experiments are carried out on the spectral colors of each wavelength at a certain wavelength interval, such as 10nm, and a corresponding set of color matching equations and a set of curves r(λ), g(λ), and b(λ) can be obtained, which are called spectral tristimulus value curves. Suppose the spectral distribution function of the light to be measured is ψ, (λ), and the spectral tristimulus values ​​​​are weighted by wavelength based on the color mixing principle to obtain the tristimulus values ​​​​of each wavelength, and then the tristimulus values ​​​​of the light to be measured can be calculated by adding and summing them.

[0014] As a preferred technical solution of the present invention, the dual color temperature parameters include a power value and a duty cycle.

[0015] As a preferred technical solution of the present invention, a color temperature adjustment circuit is also included for implementing the method, the color temperature adjustment circuit includes a CPU module, a wireless communication module is connected to the CPU module, and a PWM1 pin and a PWM2 pin on the wireless communication module are respectively connected to a PWM1 pin and a PWM2 pin on the CPU module.

[0016] The wireless communication module receives a remote instruction and outputs two color temperature control signals. The CPU module receives the two color temperature control signals output by the wireless communication module. The CPU module outputs three color temperature control signals according to the two received color temperature control signals.

[0017] The first output end of the CPU module is connected to the CW pin of the LED power output interface via a single-channel MX driver module, the second output end of the CPU module is connected to the G pin of the LED power output interface via a single-channel MZ driver module, and the third output end of the CPU module is connected to the CW pin of the LED power output interface via a single-channel MY driver module.

[0018] As a preferred technical solution of the present invention, it also includes capacitors EC2, EC5 and EC7, the capacitor EC2 is connected in parallel between the VO pin and the WW pin of the LED power output interface, the capacitor EC5 is connected in parallel between the VO pin and the G pin of the LED power output interface, and the capacitor EC5 is connected in parallel between the VO pin and the CW pin of the LED power output interface.

[0019] As a preferred technical solution of the present invention, inductors are connected in series between the WW pin of the LED power output interface and the output end of the single-channel MX driver module, between the G pin of the LED power output interface and the output end of the single-channel MZ driver module, and between the CW pin of the LED power output interface and the single-channel MX driver.

[0020] As a preferred technical solution of the present invention, it also includes a four-way DIP switch, and one end of the four-way DIP switch is connected to one end of the resistor R21, the resistor R40, R39 and R42, the other end of the resistor R40 is connected to the PWM end of the single-way MY drive module, and is also connected to the PWMCW end of CON6 connected to the CPU module 1, the other end of the resistor R39 is connected to the PWM end of the single-way MX drive module, and is also connected to the PWMWW end of CON6 connected to the CPU module 1; the other end of the resistor R42 is connected to the PWM end of the single-way MZ drive module, and is also connected to the PWMG end of CON6 connected to the CPU module;

[0021] A resistor is connected in series on each of the other ends of the four-way dip switch, and the end of the resistor that is not connected to the four-way dip switch is connected to the other end of the resistor R21, while the other end of the resistor R21 is connected to the resistor R20, and the other end of the resistor R20 is connected to a 3.3v voltage, and the other end of the four-way dip switch is connected to the ADIM pins of the single-way MX drive module, the single-way MZ drive module, and the single-way MY drive module.

[0022] The beneficial effects of the present invention are:

[0023] 1. The method for adjusting the light source curve of the dual-color temperature lamp first obtains the required target color temperature, wherein the yellow light of the dual-color temperature is X and the white light is Y, and then the dual-color temperature parameters input are X1 and Y1; green lamp beads are added to the LED light board, and the green lamp beads are used for fill light; the control module outputs the corresponding three-way color temperature parameters X2, Y2 and G according to the color temperature table based on the received dual-color temperature parameters X1 and Y1, wherein the G color temperature parameter is used to control the green lamp beads; the target color temperature is obtained by mixing yellow light, white light and green light; three-way color temperature control signals are output according to the received two-way color temperature control signals, so as to realize the superposition of the third light output on the original dual-channel lighting effect, so that the dual-color temperature curve output by the original lamp is infinitely close to the blackbody curve, so as to achieve the purpose of improving and enhancing the lighting effect, and finally realize a wider and more accurate color temperature adjustment range to meet the lighting needs of the huge market.

[0024] 2. This method of adjusting the light source curve of dual color temperature lamps is to set up a special circuit, in which capacitors EC2, EC5 and EC7 play a filtering role, resistors R31, R35 and R38 offset weak leakage to avoid turning off the light, and the four-way DIP switch adjusts the number of connected resistors to adjust the current and change the power. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] In the attached picture:

[0027] Figure 1 It is a structural schematic diagram of a method for adjusting a light source curve of a dual color temperature lamp according to the present invention;

[0028] Figure 2 It is a circuit schematic diagram of a color temperature adjustment circuit of a method for adjusting a light source curve of a dual color temperature lamp of the present invention;

[0029] Figure 3 It is a schematic diagram of a color temperature table of a method for adjusting a light source curve of a dual color temperature lamp of the present invention.

[0030] In the figure: 1. CPU module; 2. Wireless communication module; 3. LED power output interface; 4. Single-channel MX driver module; 5. Single-channel MZ driver module; 6. Single-channel MY driver module. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Example: Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a method for adjusting a light source curve of a dual color temperature lamp, comprising the following steps:

[0033] Step 1: First, obtain the target color temperature, where the yellow light of the dual color temperature is X and the white light is Y, and then the dual color temperature parameters input are X1 and Y1;

[0034] Step 2: Add green lamp beads to the LED light board and use them for fill light;

[0035] Step 3, the control module outputs the corresponding three-way color temperature parameters X2, Y2 and G according to the color temperature table based on the received dual color temperature parameters X1 and Y1, wherein the G color temperature parameter is used to control the green lamp bead;

[0036] Step 4: The target color temperature is obtained by mixing yellow light, white light and green light. This method outputs three color temperature control signals according to the received two color temperature control signals, so as to superimpose the third light output on the original dual-channel lighting effect, so that the dual color temperature curve output by the original lamp is infinitely close to the black body curve, so as to achieve the purpose of improving and enhancing the lighting effect, and finally achieve a wider and more accurate color temperature adjustment range to meet the lighting needs of the huge market.

[0037] The method of mixing the yellow light, white light and green light to obtain the target color temperature is to take red (R), green (G) and blue (B) as the three primary colors,

[0038] Then C=c(C)=r(R)+g(G)+b(B)

[0039] In the formula, r, g, and b are called the tristimulus values ​​of color C.

[0040] In the visible light range of 380-780nm, a series of color matching experiments are carried out on the spectral colors of each wavelength at a certain wavelength interval, such as 10nm, to obtain a corresponding set of color matching equations and a set of curves r(λ), g(λ), b(λ), which are called spectral tristimulus value curves. Suppose the spectral distribution function of the light to be measured is ψ, (λ), and the spectral tristimulus values ​​weighted by wavelength according to the color mixing principle can obtain the tristimulus values ​​of each wavelength, and then add and sum them to calculate the tristimulus values ​​of the light to be measured. In this way, the obtained color temperature is more in line with the time requirements. Among them, the dual color temperature parameters include power value and duty cycle.

[0041] The method further includes a color temperature adjustment circuit for implementing the method, wherein the color temperature adjustment circuit includes a CPU module 1, the CPU module 1 is connected to a wireless communication module 2, and the PWM1 pin and the PWM2 pin on the wireless communication module 2 are respectively connected to the PWM1 pin and the PWM2 pin on the CPU module 1.

[0042] The wireless communication module 2 receives a remote command and outputs two color temperature control signals. The CPU module 1 receives the two color temperature control signals output by the wireless communication module 2. The CPU module 1 outputs three color temperature control signals according to the received two color temperature control signals. It is assumed that the proportion of yellow light of the dual color temperature is W, and the proportion of white light is C. Then, the dual color temperature parameters at the input end are W1 and C1, the dual color temperature parameters at the output end are W2 and C2, and the superimposed green light parameter is G. The CPU module 1 obtains the output parameters of W2, C2, and G by judging and calculating the input parameters W1 and C1.

[0043] The first output end of the CPU module 1 is connected to the CW pin of the LED power output interface 3 via the single-channel MX driver module 4, the second output end of the CPU module 1 is connected to the G pin of the LED power output interface 3 via the single-channel MZ driver module 5, and the third output end of the CPU module 1 is connected to the CW pin of the LED power output interface 3 via the single-channel MY driver module 6. The wireless communication module 2 receives the remote command and outputs two color temperature control signals. The CPU module 1 receives the two color temperature control signals output by the wireless communication module 2, and the CPU module 1 outputs three color temperature control signals according to the received two color temperature control signals, so as to realize the superposition of the third light output on the original dual-channel lighting effect, so that the dual color temperature curve output by the original lamp is infinitely close to the black body curve, so as to achieve the purpose of improving and enhancing the lighting effect, and finally realize a wider and more accurate color temperature adjustment range to meet the lighting needs of the huge market.

[0044] Among them, it also includes capacitors EC2, EC5 and EC7, the capacitor EC2 is connected in parallel between the VO pin and the WW pin of the LED power output interface 3, the capacitor EC5 is connected in parallel between the VO pin and the G pin of the LED power output interface 3, and the capacitor EC5 is connected in parallel between the VO pin and the CW pin of the LED power output interface 3. The capacitors EC2, EC5 and EC7 play a filtering role to filter the noise signal.

[0045] The resistors R31, R35 and R38 are also included. The resistor R31 is connected in parallel between the VO pin and the WW pin of the LED power output interface 3. The resistor R35 is connected in parallel between the VO pin and the G pin of the LED power output interface 3. The resistor R37 is connected in parallel between the VO pin and the CW pin of the LED power output interface 3. The resistors R31, R35 and R38 offset weak leakage to avoid the light not turning off.

[0046] Among them, inductors are connected in series between the WW pin of the LED power output interface 3 and the output end of the single-channel MX driver module 4, between the G pin of the LED power output interface 3 and the output end of the single-channel MZ driver module 5, and between the CW pin of the LED power output interface 3 and the single-channel MX driver 6.

[0047] Among them, it also includes a four-way DIP switch, and one end of the four-way DIP switch is connected to one end of the resistor R21, the resistor R40, R39 and R42, the other end of the resistor R40 is connected to the PWM end of the single-way MY driver module 6, and is also connected to the PWMCW end of the CON6 connected to the CPU module 1, the other end of the resistor R39 is connected to the PWM end of the single-way MX driver module 4, and is also connected to the PWMWW end of the CON6 connected to the CPU module 1; the other end of the resistor R42 is connected to the PWM end of the single-way MZ driver module 5, and is also connected to the PWMG end of the CON6 connected to the CPU module 1;

[0048] A resistor is connected in series on each of the other ends of the four-way dip switch, and the end of the resistor that is not connected to the four-way dip switch is connected to the other end of the resistor R21, while the other end of the resistor R21 is connected to the resistor R20, and the other end of the resistor R20 is connected to a 3.3v voltage, and the other end of the four-way dip switch is connected to the ADIM pins of the single-way MX drive module 4, the single-way MZ drive module 5, and the single-way MY drive module 6. The four-way dip switch adjusts the number of connected resistors to adjust the current and change the power.

[0049] When working, the method for adjusting the light source curve of the dual-color temperature lamp first obtains the required target color temperature, wherein the yellow light of the dual-color temperature is X and the white light is Y, and then the dual-color temperature parameters input are X1 and Y1; green lamp beads are added to the LED light board, and the green lamp beads are used for fill light; the control module outputs the corresponding three-way color temperature parameters X2, Y2 and G according to the color temperature table based on the received dual-color temperature parameters X1 and Y1, wherein the G color temperature parameter is used to control the green lamp beads; the target color temperature is obtained by mixing yellow light, white light and green light; three-way color temperature control signals are output according to the received two-way color temperature control signals, so as to achieve the superposition of the third light output on the original dual-channel lighting effect, so that the dual-color temperature curve output by the original lamp is infinitely close to the blackbody curve, so as to achieve the purpose of improving and enhancing the lighting effect, and finally achieve a wider and more accurate color temperature adjustment range to meet the lighting needs of the huge market.

[0050] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting a light source curve of a dual color temperature lamp, characterized in that: The following steps are involved: Step 1: First, obtain the target color temperature, where the yellow light of the dual color temperature is X and the white light is Y, and then the dual color temperature parameters input are X1 and Y1; Step 2: Add green lamp beads to the LED light board and use them for fill light; Step 3, the control module outputs the corresponding three-way color temperature parameters X2, Y2 and G according to the color temperature table based on the received dual color temperature parameters X1 and Y1, wherein the G color temperature parameter is used to control the green lamp bead; Step 4: Get the target color temperature by mixing yellow light, white light and green light.

2. The method for adjusting the light source curve of a dual color temperature lamp according to claim 1, characterized in that: The method of mixing the yellow light, white light and green light to obtain the target color temperature is to take red (R), green (G) and blue (B) as the three primary colors, Then C=c(C)=r(R)+g(G)+b(B) In the formula, r, g, and b are called the tristimulus values ​​of color C. In the visible light range of 380-780nm, a series of color matching experiments are carried out on the spectral colors of each wavelength at a certain wavelength interval, such as 10nm, and a corresponding set of color matching equations and a set of curves r(λ), g(λ), and b(λ) can be obtained, which are called spectral tristimulus value curves. Suppose the spectral distribution function of the light to be measured is ψ, (λ), and the spectral tristimulus values ​​​​are weighted by wavelength based on the color mixing principle to obtain the tristimulus values ​​​​of each wavelength, and then the tristimulus values ​​​​of the light to be measured can be calculated by adding and summing them.

3. The method for adjusting the light source curve of a dual color temperature lamp according to claim 1, characterized in that: The dual color temperature parameters include power value and duty cycle.

4. A method for adjusting a light source curve of a dual color temperature lamp according to any one of claims 1 to 3, characterized in that: The invention also includes a color temperature adjustment circuit for implementing the method, wherein the color temperature adjustment circuit includes a CPU module (1), the CPU module (1) is connected to a wireless communication module (2), a PWM1 pin and a PWM2 pin on the wireless communication module (2) are respectively connected to the PWM1 pin and the PWM2 pin on the CPU module (1), The wireless communication module (2) receives a remote instruction and outputs two color temperature control signals, the CPU module (1) receives the two color temperature control signals output by the wireless communication module (2), and the CPU module (1) outputs three color temperature control signals according to the received two color temperature control signals; The first output end of the CPU module (1) is connected to the CW pin of the LED power output interface (3) via a single-channel MX drive module (4), the second output end of the CPU module (1) is connected to the G pin of the LED power output interface (3) via a single-channel MZ drive module (5), and the third output end of the CPU module (1) is connected to the CW pin of the LED power output interface (3) via a single-channel MY drive module (6).

5. The method for adjusting the light source curve of a dual color temperature lamp according to claim 4, characterized in that: The device also includes capacitors EC2, EC5 and EC7, wherein the capacitor EC2 is connected in parallel between the VO pin and the WW pin of the LED power supply output interface (3), the capacitor EC5 is connected in parallel between the VO pin and the G pin of the LED power supply output interface (3), and the capacitor EC5 is connected in parallel between the VO pin and the CW pin of the LED power supply output interface (3).

6. The method for adjusting the light source curve of a dual color temperature lamp according to claim 5, characterized in that: Inductors are connected in series between the WW pin of the LED power output interface (3) and the output end of the single-channel MX drive module (4), between the G pin of the LED power output interface (3) and the output end of the single-channel MZ drive module (5), and between the CW pin of the LED power output interface (3) and the single-channel MX drive (6).

7. The method for adjusting the light source curve of a dual color temperature lamp according to claim 6, characterized in that: It also includes a four-way DIP switch, and one end of the four-way DIP switch is connected to one end of a resistor R21, a resistor R40, a resistor R39 and a resistor R42; the other end of the resistor R40 is connected to the PWM end of a single-way MY drive module (6), and is also connected to the PWMCW end of CON6 connected to the CPU module 1; the other end of the resistor R39 is connected to the PWM end of a single-way MX drive module (4), and is also connected to the PWMWW end of CON6 connected to the CPU module 1; the other end of the resistor R42 is connected to the PWM end of a single-way MZ drive module (5), and is also connected to the PWMG end of CON6 connected to the CPU module (1); Each of the other ends of the four-way DIP switch is connected in series with a resistor, and one end of the resistor that is not connected to the four-way DIP switch is connected to the other end of the resistor R21, while the other end of the resistor R21 is connected to a resistor R20, and the other end of the resistor R20 is connected to a 3.3V voltage, and the other end of the four-way DIP switch is connected to the ADIM pins of the single-way MX drive module (4), the single-way MZ drive module (5), and the single-way MY drive module (6).

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