Three-primary-color LED device luminous intensity compensation method based on color gamut and electro-optical conversion efficiency

Abstract

The invention discloses a three-primary-color LED device luminous intensity compensation method based on color gamut and electro-optical conversion efficiency, which comprises the following steps: calculating the color gamut area of an RGB LED light source through the working temperature and working current of RGB LED lamps, and further controlling the luminous flux of the red LED lamp, the green LED lamp and the blue LED lamp to be the same value on the basis. The color gamut area and the photoelectric conversion efficiency are optimized under the condition that the luminous fluxes of the red LED, the green LED and the blue LED are the same; an evaluation algorithm is established to reasonably distribute the proportion of the color gamut area and the photoelectric conversion efficiency, a proper luminous flux value is found, and the color gamut area and the photoelectric conversion efficiency are optimized according to the luminous flux. According to the three-primary-color LED device luminous intensity compensation method based on the color gamut and the electro-optical conversion efficiency, the color gamut area of the RGB three-primary-color LED light source can be accurately and rapidly calculated, the problem that the color gamut area cannot be directly calculated in the prior art is solved, the relation between the color gamut area and the electro-optical conversion efficiency is further optimized, and the luminous intensity of the RGB three-primary-color LED device is improved. And the purpose of saving energy is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of color gamut area calculation for LED display light sources, and in particular to a luminous intensity compensation method for a three-primary color LED device based on color gamut and electro-optical conversion efficiency. Background Art

[0002] Color gamut is an important criterion for judging the color effect of display devices. At present, the mainstream method is to use red, green and blue as the three primary colors to achieve color display. Light-emitting diodes (LEDs) have excellent characteristics such as energy saving, safety, small size, strong monochromaticity, short response time and long life. Red, green and blue (RGB) LEDs have been widely used in various aspects of life, such as LED mobile phone screens, LED TV screens, etc. LEDs are semiconductors, and changes in operating temperature and operating current will affect the spectrum of LED light sources. The color gamut characteristics (color gamut area, photoelectric conversion efficiency) of the color light source formed by the combination of RGB LEDs are also affected by the operating temperature and operating current. In real life, the heat generated by LED lights causes the operating temperature to rise, and the increase in operating temperature further causes the color coordinates of the LED light source to change, and finally the color gamut area of ​​the RGB LED light source changes. The current technology performs color gamut error analysis on the display image set of the LED display screen and power consumption error analysis on the target display power consumption data set, switches the control parameters according to the color gamut error data and power consumption error data, and optimizes the parameters for switching adjustment, providing two display modes for LED to select the appropriate display mode according to different situations. At present, there is a technology that uses white light LED to develop a new method for adjusting the color gamut of white light emitted by white light LED chips, and saves the amount of quantum dots in white light LED chips. A new energy-saving Mini LED backlight module with switchable color gamut can light up the blue light Mini LED light board through the drive of the backlight module according to actual needs. At this time, the white light Mini LED substrate is not powered, and R, G, B with high color gamut is displayed; or only the substrate containing white light Mini LED is lit, and the light board containing blue light Mini LED is not powered, and R, G, B with ordinary color gamut is displayed; thus, free switching between high color gamut and ordinary color gamut is achieved. Factors affecting the color gamut area include the operating temperature of RGB LED and the operating current of the three RGB LED lights. At present, there is a lack of methods for calculating the color gamut area of ​​RGB LED light sources using these four variables. In practical applications, the color gamut area of ​​display devices is not the only pursuit of display devices, but also the photoelectric conversion efficiency must be taken into account. Existing LED display screens are all pursuing higher color gamuts, and very little attention is paid to the energy consumption of LED display screens. Therefore, how to optimize the color gamut area and electro-optical conversion efficiency of display light sources is a difficult problem. Summary of the invention

[0003] The purpose of the present invention is to provide a luminous intensity compensation method for a three-primary color LED device based on color gamut and electro-optical conversion efficiency, which can accurately and quickly calculate the color gamut area of ​​an RGB three-primary color LED light source, solve the problem that the color gamut area cannot be directly calculated in the prior art, and further optimize the relationship between the color gamut area and the photoelectric conversion efficiency to achieve the purpose of energy saving.

[0004] To achieve the above object, the present invention provides a method for compensating the luminous intensity of a three-primary color LED device based on color gamut and electro-optical conversion efficiency, comprising the following steps:

[0005] Obtain the heat sink temperature of the RGB three-primary color LED and the current of the RGB three-primary color LED, that is, the operating temperature and the operating current of the RGB LED lamp, calculate the color gamut area of ​​the RGB LED light source by the operating temperature and the operating current of the RGB LED lamp, and further control the luminous flux of the red, green and blue LED lamps to be the same value on this basis, and optimize the color gamut area and photoelectric conversion efficiency under the condition that the luminous flux of the red, green and blue LEDs are the same;

[0006] Establish an evaluation algorithm to reasonably allocate the proportion of color gamut area and photoelectric conversion efficiency, find a suitable luminous flux value, and optimize the color gamut area and photoelectric conversion efficiency according to the luminous flux.

[0007] Preferably, the heat sink temperature of the RGB three-primary-color LED is obtained, and the current of the RGB three-primary-color LED is calculated by measuring the RGB LED light spectrum data under each temperature and current combination respectively, and the light spectrum data includes luminous flux, color coordinates, and light power.

[0008] Preferably, measuring the spectrum data of the RGB LED lamp under each temperature and current combination respectively includes the following steps:

[0009] First, the heat sink temperature is controlled to a fixed value, the red LED lamp is connected to the current, the current is controlled to a fixed value, the spectrum data of the red LED lamp is measured at this time, and the voltage of the red LED lamp is recorded;

[0010] After the measurement is completed, increase the current of the red LED lamp and wait and then measure the spectrum data of the red LED lamp and record the voltage again. Set the current of multiple gears and continue to measure the spectrum data and voltage of the red LED lamp according to the same operation, and then measure the spectrum data of the red LED lamp at the initially set working temperature;

[0011] Then the same method is used to measure the spectrum data and voltage of the red LED light at multiple operating temperatures, and finally all the data of the red LED light is obtained;

[0012] Then use the measurement data method and steps of the red LED light to measure the spectral data and voltage of the green LED light, blue LED light, and white LED light.

[0013] Preferably, a functional relationship between the tristimulus values ​​of a single LED light source and the operating current and operating temperature is established based on the measured spectral data, and then the LED light source color coordinates are calculated based on the tristimulus values, thereby establishing a functional relationship between the LED light source color coordinates and the LED light source operating temperature and operating current.

[0014] Preferably, the color gamut area of ​​the RGB LED light source depends on the color coordinates of the RGB LED light source. The color gamut area of ​​the RGB LED light source is calculated by the color coordinates, and the color coordinates are used to establish a relationship between the color gamut area and the operating temperature and operating current of the RGB LED light source.

[0015] Preferably, the method for optimizing the color gamut area and the photoelectric conversion efficiency according to the luminous flux comprises the following steps:

[0016] Add the spectrum data measurement of white light LED light source. The measurement process is consistent with the spectrum data of RGB LED light, and the spectrum data of RGBW LED light source is obtained.

[0017] The spectrum data of the RGBW LED light source measured is used to establish the functional relationship between the working temperature and working current of a single LED and the luminous flux; the working current and voltage of a single LED are used to obtain the electrical power, and the functional relationship between the electrical power and optical power of a single LED and the working temperature and working current is established respectively. The optical power of all LEDs is added to obtain the total optical power of the LED light source, and the electrical power of a single LED is added to obtain the total electrical power of the LED light source. Total optical power / total electrical power = photoelectric conversion efficiency;

[0018] When the luminous flux of a certain LED lamp fails to reach the target luminous flux, white light LED is used to compensate the luminous flux;

[0019] Normalize the values ​​of color gamut area and photoelectric conversion efficiency;

[0020] Finally, an optimization function is established to optimize the color gamut area and photoelectric conversion efficiency.

[0021] Therefore, the present invention adopts the above-mentioned three-primary color LED device luminous intensity compensation method based on color gamut and electro-optical conversion efficiency, and its technical effects are as follows:

[0022] (1) The color coordinates, color gamut area, luminous flux, and photoelectric conversion efficiency can be obtained through the operating temperature and operating current of the LED lamp. The LED operating temperature and operating current are physical quantities that are easy to obtain. It is convenient and quick to calculate physical quantities such as color coordinates, color gamut area, luminous flux, and electro-optical conversion efficiency through physical quantities that are easy to obtain.

[0023] The error between the calculation and measurement is very small. The maximum error of the color coordinate x of the red LED light is 0.18%, the minimum error is 0.05%, and the average error is 0.12%; the maximum error of the color coordinate y of the red LED light is 0.30%, the minimum error is 0.05%, and the average error is 0.21%. The maximum error of the color coordinate x of the green LED light is 3.81%, the minimum error is 0.05%, and the average error is 2.32%; the maximum error of the color coordinate y of the green LED light is 0.33%, the minimum error is 0.01%, and the average error is 0.15%. The maximum error of the color coordinate x of the blue LED light is 0.33%, the minimum error is 0.01%, and the average error is 0.19%; the maximum error of the color coordinate y of the blue LED light is 2.47%, the minimum error is 0.01%, and the average error is 1.56%. When the working temperature is 25℃, the maximum error between the color gamut area calculated by the formula and the measured color gamut area is 0.98%, the minimum error is 0.01%, and the average error is 0.48%. The maximum error at other operating temperatures is 0.84%. The results show that the calculated results are in good agreement with the experimental results.

[0024] The error between the color gamut area model calculation result and the measurement is 0.98%, the minimum error is 0.01%, and the average error is 0.48%. It proves that the established model is very good and can calculate the color gamut area of ​​RGB LED light source with an error of no more than 1%.

[0025] (2) The present invention optimizes the color gamut area and photoelectric conversion efficiency based on luminous flux. The electro-optical conversion efficiency is increased by more than 10% at the small expense of reducing the color gamut area by about 1%. The 1% reduction in the color gamut area has little effect on the display quality, while the 10% increase in photoelectric conversion efficiency is a great improvement in energy saving.

[0026] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram of the experimental measurement data structure;

[0028] Figure 2 This is the trend of color coordinate data obtained from experimental measurement. Figure 2 (a) is the trend of the color coordinates (x, y) of the red LED changing with the operating current and operating temperature; Figure 2 (b) is the trend of the green LED color coordinates (x, y) changing with the operating current and operating temperature; Figure 2 (c) is the trend of blue LED color coordinates (x, y) changing with operating current and operating temperature; Figure 2(d) is the red LED color coordinates (x, y) as the operating current and operating temperature change in the CIE 1931 chromaticity diagram; Figure 2 (e) is the green LED color coordinates (x, y) as the operating current and operating temperature change in the CIE 1931 chromaticity diagram; Figure 2 (f) shows the blue LED color coordinates (x, y) in the CIE 1931 chromaticity diagram as the operating current and operating temperature change;

[0029] Figure 3 This is a comparison chart of the color gamut area calculated directly from experimental measurement data and the color gamut area calculated from the model. Figure 3 (a) is a comparison chart of the color gamut area calculated by experimental measurement data and the color gamut area calculated by the model with the blue LED working current and the green LED working current when the working temperature is 25℃ and the red LED working current is 50mA; Figure 3 (b) is a comparison chart of the color gamut area calculated by experimental measurement data and the color gamut area calculated by the model with the blue LED working current and the green LED working current when the working temperature is 25°C and the red LED working current is 500mA; Figure 3 (c) is a comparison chart of the color gamut area calculated by experimental measurement data and the color gamut area calculated by the model with the green LED operating current of 50mA and the blue LED operating current of 50mA as the red LED operating current and operating temperature change; Figure 3 (d) is a comparison chart of the color gamut area calculated by experimental measurement data and the color gamut area calculated by the model with the blue LED operating current and operating temperature when the red LED operating current is 50mA and the green LED operating current is 50mA;

[0030] Figure 4 is the change of color gamut area under the change of two groups of luminous flux, Figure 4 (a) is the trend of the color gamut area of ​​the RGB three-primary color LED light source with the luminous flux when the luminous flux is between 10Lm and 25Lm and no white LED is needed to compensate the luminous flux; Figure 4 (b) When the luminous flux is between 50Lm and 200Lm, and at least one of the RGB three-primary color LEDs needs a white LED to compensate for the luminous flux, the color gamut area of ​​the RGBW four-primary color LED light source changes with the luminous flux;

[0031] Figure 5 It is the reflection of the change of color gamut area under the change of two groups of luminous flux in the CIE 1931 chromaticity diagram. Figure 5(a) is the color gamut area of ​​the RGB three-primary color LED light source in the CIE 1931 chromaticity diagram when the luminous flux of a single LED is 10Lm, 15Lm, 20Lm, and 25Lm respectively; Figure 5 (b) The color gamut area of ​​the RGBW four-primary color LED light source is displayed in the CIE 1931 chromaticity diagram when the luminous flux of a single LED of the RGB three-primary color LED light source is 50Lm, 100Lm, 150Lm, and 200Lm respectively (when the LED luminous flux cannot reach the target, a white LED is used to compensate for the luminous flux);

[0032] Figure 6 Changes in electro-optical conversion efficiency under two groups of luminous flux changes, Figure 6 (a) is the trend of the electro-optical conversion efficiency of the RGB three-primary color LED light source with the luminous flux when the luminous flux is between 10Lm and 25Lm and no white LED is needed to compensate the luminous flux; Figure 6 (b) The electro-optical conversion efficiency of the RGBW four-primary color LED light source varies with the luminous flux when the luminous flux is between 50Lm and 200Lm and at least one of the RGB three-primary color LEDs needs a white LED to compensate for the luminous flux;

[0033] Figure 7 It is an optimization flow chart based on luminous flux, color gamut area and electro-optical conversion efficiency. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0035] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0036] The LED lamp used in the experiment is the XMLCTW-A0-0000-00C2AAAB1 four-primary color LED lamp. The Yokogawa GS610 programmable DC power supply is used to provide a stable current to the LED lamp. The Everfine TC-100 high-power LED temperature controller is used to control the temperature of the radiator. The AIS-2_0.5m_R98 integrating sphere and the HAAS-2000 high-precision spectrum analysis system are used to measure the spectrum data of the LED lamp (luminous flux, color coordinates, optical power, etc.)

[0037] Embodiment 1

[0038] like Figure 7 As shown, the present invention provides a luminous intensity compensation method for a three-primary color LED device based on color gamut and electro-optical conversion efficiency, comprising the following steps:

[0039] Step 1: Calculate the color gamut area of ​​the RGB LED light source by the operating temperature and operating current of the RGB LED lamp, and on this basis further control the luminous flux of the three LED lamps of red, green and blue to be the same value, and optimize the color gamut area and photoelectric conversion efficiency under the condition that the luminous flux of the three LEDs of red, green and blue are the same;

[0040] Get the heat sink temperature and current of the RGB tri-color LED. Set the heat sink temperature to 25℃, 40℃, 55℃, and 70℃, and the current of the RGB LED to 50mA, 100mA, 200mA, 300mA, 400mA, and 500mA. Measure the spectral data (luminous flux, color coordinates, optical power, etc.) of the RGB LED at each temperature and current combination.

[0041] Measurement process:

[0042] First, control the heat sink temperature at 25℃, connect the red LED lamp to the current, control the current to 50mA, measure the spectrum data of the red LED lamp and record the voltage of the red LED lamp. After the measurement is completed, increase the current of the red LED lamp to 100mA and wait for five minutes to measure the spectrum data of the red LED lamp and record the voltage again. The same operation continues to measure the spectrum data and voltage of the red LED lamp when the current is 200mA, 300mA, 400mA, and 500mA. In this way, the spectrum data of the red LED lamp at an operating temperature of 25℃ is measured. Then use the same method to measure the spectrum data and voltage of the red LED lamp at operating temperatures of 40℃, 55℃, and 70℃, and finally obtain all the data of the red LED lamp. Then use the measurement data method steps of the red LED lamp to measure the spectrum data and voltage of the green LED lamp, blue LED lamp, and white LED lamp.

[0043] The three stimulus values ​​of each LED are calculated using the spectral data. The three stimulus values ​​are closely related to the operating temperature and the operating current. The functional relationship between the three stimulus values ​​and the heat sink temperature (operating temperature) and the operating current is obtained by fitting the spectral data. Then the color coordinates of the LED light source are calculated using the three stimulus values. The calculation formula is as follows:

[0044]

[0045] X, Y, and Z represent tristimulus values, and x, y, and z represent color coordinates. Since the tristimulus value Y represents brightness, and brightness is proportional to the luminous flux Φv, the chromaticity coordinates (x, y) can be rewritten as:

[0046]

[0047] In the formula, K represents the proportional relationship between Y in the tristimulus value and the luminous flux. The K value is different for different LED lights.

[0048] Through formulas (1) and (2), the relationship between the color coordinates (x, y) of the RGB LED light source and the operating temperature and operating current can be expressed as:

[0049]

[0050] xr represents the color coordinate x of the red LED light source, yr represents the color coordinate y of the red LED light source, Ir represents the operating current of the red LED, xg represents the color coordinate x of the green LED light source, yg represents the color coordinate y of the red LED light source, Ig represents the operating current of the green LED, xb represents the color coordinate x of the blue LED light source, yb represents the color coordinate y of the blue LED light source, Ib represents the operating current of the blue LED, and Ths represents the common operating temperature of the RGB LEDs;

[0051] Then, the color coordinates of the LED light source can be calculated based on the three stimulus values, thereby establishing a functional relationship between the color coordinates of the LED light source and the operating temperature and operating current of the LED light source. The color gamut area of ​​the RGB LED light source is defined as a triangle in the color space. The shape of the triangle depends on the color coordinates of the RGB LED light source. Therefore, the color gamut area of ​​the RGB LED light source is calculated by the color coordinates, and the color coordinates are used to link the color gamut area with the operating temperature and operating current of the RGB LED light source.

[0052] The color gamut area is the area of ​​the triangle formed by the color coordinates (x, y) in the color space, so the color gamut area can be expressed as:

[0053] S=f[(x r ,y r ),(x b ,y b ),(x g ,y g )] (4).

[0054] Step 2: Establish an evaluation algorithm to reasonably allocate the proportion of color gamut area and photoelectric conversion efficiency, find a suitable luminous flux value, and optimize the color gamut area and photoelectric conversion efficiency according to the luminous flux;

[0055] Added spectral data measurement of white light (W) LED light source, and the measurement process is the same as that of RGB LED light source.

[0056] The spectrum data of the RGBW LED light source measured is used to establish the functional relationship between the working temperature and working current of a single LED and the luminous flux. The working current and voltage of a single LED are used to obtain the electrical power. The functional relationship between the electrical power and optical power of a single LED and the working temperature and working current is established respectively. The optical power of all LEDs is added to obtain the total optical power of the LED light source, and the electrical power of a single LED is added to obtain the total electrical power of the LED light source. Total optical power / total electrical power = photoelectric conversion efficiency.

[0057] Due to the difference in the luminous flux of RGB LEDs, the luminous flux of a certain LED light may not reach the target luminous flux. In this case, white light LEDs are used to compensate for the luminous flux. For example, two groups of luminous flux ranges are set, the first group of luminous flux range is 10Lm-25Lm, and the second group of luminous flux range is 50Lm-200Lm. The RGB LED light sources within the first group of luminous flux range do not need white light LEDs to compensate for the luminous flux, and at least one LED light source in the second group of RGB LEDs needs white light LEDs to compensate for the luminous flux.

[0058] The color gamut area and photoelectric conversion efficiency are two different physical quantities and cannot be directly compared. Therefore, their values ​​are normalized, and finally an optimization function is established to optimize the two quantities, and then the optimal luminous flux is solved through the optimization function.

[0059] The following is the maximization objective function within the first set of luminous flux range:

[0060]

[0061] Wherein, N represents the number of samples within the luminous flux range, ηi represents the electro-optical conversion efficiency at the i-th sampling, ηmin represents the minimum electro-optical conversion efficiency, ηmax represents the maximum electro-optical conversion efficiency, Si represents the color gamut area at the i-th sampling, Smin represents the minimum color gamut area, and Smax represents the maximum color gamut area;

[0062] The second group of luminous flux ranges requires white light LED compensation light. Analysis shows that based on the compensation light of white light LED devices, the coverage of DCI-P3 and Res.2020 decreases significantly with the increase of the target luminous flux of RGB LED devices, and the electro-optical conversion efficiency also decreases. Therefore, when the luminous flux is too large, it is not beneficial to the color gamut area and electro-optical conversion efficiency.

[0063] Therefore, the present invention adopts the above-mentioned three-primary color LED device luminous intensity compensation method based on color gamut and electro-optical conversion efficiency, which can accurately and quickly calculate the color gamut area of ​​the RGB three-primary color LED light source, solves the problem that the color gamut area cannot be directly calculated in the prior art, and further optimizes the relationship between the color gamut area and the photoelectric conversion efficiency, thereby achieving the purpose of energy saving.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for compensating the luminous intensity of a three-primary color LED device based on color gamut and electro-optical conversion efficiency, characterized in that: The following steps are involved: Obtain the heat sink temperature of the RGB three-primary color LED and the current of the RGB three-primary color LED, that is, the operating temperature and the operating current of the RGB LED lamp, calculate the color gamut area of ​​the RGB LED light source by the operating temperature and the operating current of the RGB LED lamp, and further control the luminous flux of the red, green and blue LED lamps to be the same value on this basis, and optimize the color gamut area and photoelectric conversion efficiency under the condition that the luminous flux of the red, green and blue LEDs are the same; Establish an evaluation algorithm to reasonably allocate the proportion of color gamut area and photoelectric conversion efficiency, find a suitable luminous flux value, and optimize the color gamut area and photoelectric conversion efficiency according to the luminous flux.

2. The luminous intensity compensation method of a three-primary-color LED device based on color gamut and electro-optical conversion efficiency according to claim 1, characterized in that: The heat sink temperature of the RGB three-primary color LED is obtained. The current of the RGB three-primary color LED is calculated by measuring the RGB LED light spectrum data under each temperature and current combination respectively. The light spectrum data includes luminous flux, color coordinates, and light power.

3. The luminous intensity compensation method of a three-primary-color LED device based on color gamut and electro-optical conversion efficiency according to claim 2, characterized in that: Measuring the spectrum data of the RGB LED light under each temperature and current combination includes the following steps: First, the heat sink temperature is controlled to a fixed value, the red LED lamp is connected to the current, the current is controlled to a fixed value, the spectrum data of the red LED lamp is measured at this time, and the voltage of the red LED lamp is recorded; After the measurement is completed, increase the current of the red LED lamp and wait and then measure the spectrum data of the red LED lamp and record the voltage again. Set the current of multiple gears and continue to measure the spectrum data and voltage of the red LED lamp according to the same operation, and then measure the spectrum data of the red LED lamp at the initially set working temperature; Then the same method is used to measure the spectrum data and voltage of the red LED light at multiple operating temperatures, and finally all the data of the red LED light is obtained; Then use the measurement data method and steps of the red LED light to measure the spectral data and voltage of the green LED light, blue LED light, and white LED light.

4. The luminous intensity compensation method of a three-primary color LED device based on color gamut and electro-optical conversion efficiency according to claim 1, characterized in that: The functional relationship between the three stimulus values ​​of a single LED light source and the operating current and operating temperature is established based on the measured spectral data, and then the LED light source color coordinates are calculated based on the three stimulus values, thereby establishing the functional relationship between the LED light source color coordinates and the LED light source operating temperature and operating current.

5. The luminous intensity compensation method of a three-primary-color LED device based on color gamut and electro-optical conversion efficiency according to claim 1, characterized in that: The color gamut area of ​​the RGB LED light source depends on the color coordinates of the RGB LED light source. The color gamut area of ​​the RGB LED light source is calculated by the color coordinates, and the color coordinates are used to establish a relationship between the color gamut area and the operating temperature and operating current of the RGB LED light source.

6. The luminous intensity compensation method of a three-primary-color LED device based on color gamut and electro-optical conversion efficiency according to claim 1, characterized in that: The optimization method of color gamut area and photoelectric conversion efficiency according to luminous flux includes the following steps: Add the spectrum data measurement of white light LED light source. The measurement process is consistent with the spectrum data of RGB LED light source, and the spectrum data of RGBWLED light source is obtained. The spectrum data of the RGBW LED light source measured is used to establish the functional relationship between the working temperature and working current of a single LED and the luminous flux; the working current and voltage of a single LED are used to obtain the electrical power, and the functional relationship between the electrical power and optical power of a single LED and the working temperature and working current is established respectively. The optical power of all LEDs is added to obtain the total optical power of the LED light source, and the electrical power of all LEDs is added to obtain the total electrical power of the LED light source. Total optical power / total electrical power = photoelectric conversion efficiency; When the luminous flux of a certain LED lamp fails to reach the target luminous flux, white light LED is used to compensate the luminous flux; Normalize the values ​​of color gamut area and photoelectric conversion efficiency; Finally, an optimization function is established to optimize the color gamut area and photoelectric conversion efficiency.

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