WO2024007848A1

WO2024007848A1 - Rgbwcla-based seven color-in-one led full-spectrum color mixing method

Info

Publication number: WO2024007848A1
Application number: PCT/CN2023/101061
Authority: WO
Inventors: 卢迎辉; 魏靓; 刘长军
Original assignee: 上海芯龙光电科技股份有限公司
Priority date: 2022-07-08
Filing date: 2023-06-19
Publication date: 2024-01-11
Also published as: CN115190668A

Abstract

The present application relates to the technical field of LED lighting. Disclosed is a RGBWCLA-based seven color-in-one LED full-spectrum color mixing method. The method specifically comprises providing at least one color mixing module, each color mixing module comprising an RGBWCLA-in-one LED light source, a PCB used for soldering of the light source, and an optical lens arranged on the LED light source. The LED light source has seven colors; by using a PWM dimming mode, a mixed target color or white light is obtained by adjusting the duty ratio of each of R, G, B, W, C, L and A; a numerical relationship between the chromaticity coordinates of the mixed target color or white light and the seven colors can be controlled and adjusted by means of DMX512, the gray level values of the seven colors corresponding to a duty ratio relationship of the target color or white light. When any single one of seven chips in the LED light source is turned on, a color emitted by the LED chip can be obtained; when any two LED chips in the LED light source are turned on, a mixed color between two colors can be obtained; when any three or more LED chips in the LED light source are turned on, any three or more mixed colors which form a color space in a CIE 1976 chromaticity diagram can be obtained. The present application may realize a wider color gamut area, and a wider related color temperature range of the mixed white light; the spectrum of the mixed white light can realize full-spectrum white light, and the mixed white light exhibits better quality and a color rendering index of Ra＞95 and R9＞90, thus effectively improving the core competitiveness of an LED lighting product.

Description

An LED full-spectrum color mixing method based on RGBWCLA seven colors in one

This application claims the priority of Chinese patent application 2022108076130 with a filing date of July 8, 2022. This application cites the full text of the above-mentioned Chinese patent application.

Technical field

The present invention relates to the field of LED lighting technology, and in particular to an LED full-spectrum color mixing method based on RGBWCLA seven-color integration.

Background technique

Early LED lighting color LED outdoor lamps were basically based on the three primary colors of RGB and developed into RGBW applications. The color performance range of LED lighting lamps was only a relatively small range, and the performance of mixed white light was even worse. The white light produced by the mixture was neither bright nor light. The quality is unsatisfactory, and the white light spectrum has very prominent peaks and troughs, which is obviously different from the full-spectrum sunlight spectrum! Moreover, the quality of the white light produced by mixing is extremely poor, the color rendering index is basically difficult to reach 60, and the brightness of the mixed color is also relatively low. The core competitiveness of LED lighting fixtures is insufficient!

Contents of the invention

In view of the above existing technical shortcomings, we now provide an LED full-spectrum color mixing method based on RGBWCLA seven-color integration, which achieves high-brightness target colors and a wider range of target colors!

The invention discloses an LED full-spectrum color mixing method based on RGBWCLA seven-color integration, and relates to the technical field of LED light source packaging. An LED full-spectrum color mixing method based on RGBWCLA seven-color integration. The specific method is to provide at least one color mixing module. Each color mixing module includes an RGBWCLA seven-color LED light source, a PCB board for welding the light source, and an optical lens provided with each LED light source. The color of the LED light source is seven colors. It adopts PWM dimming mode and adjusts the duty cycle of each color of R, G, B, W, C, L, and A to mix the target color or For white light, the numerical relationship between the mixed target color or the chromaticity coordinates of the white light and the seven colors can be adjusted through DMX512 control. The grayscale values of the seven colors correspond to the duty cycle relationship of the target color or the white light. Ignite any seven single chips in the LED light source to get the color emitted by the LED chip; ignite any two LED chips in the LED light source and the color between the two colors will be mixed; ignite any three or more of the LED light sources Multiple LED chips will mix three or more arbitrary colors that make up the chromaticity space in the CIE1976 chromaticity diagram. Through the present invention, a wider color gamut area can be achieved, the correlated color temperature range of the mixed white light is wider, the spectrum of the mixed white light can realize full spectrum white light, the quality of the mixed white light is also better, and the color rendering index can realize Ra>95. R9>90.

Preferably, an LED full-spectrum color mixing method based on RGBWCLA seven colors in one, the seven LED chips (3) are three primary colors RGB, three complementary colors CLA and white balance W. In the CIE1976 chromaticity diagram, the color gamut coverage is larger, The choice of white light can effectively increase brightness;

Preferably, an LED full-spectrum color mixing method based on RGBWCLA seven colors in one uses PWM dimming method to adjust the duty cycle of R, G, B, W, C, L, A LED chips to adjust the brightness of each color. To achieve the requirements of the target color, adjust the duty cycle and brightness or current value of the seven colors respectively;

Preferably, the described LED full-spectrum color mixing method based on RGBWCLA seven colors in one, PWM dimming method adjusts the duty cycle of R, G, B, W, C, L, A LED chips respectively, that is, the target color Based on the basic color, the high-quality target color is obtained through the mixing method of the lens;

Preferably, an LED full-spectrum color mixing method based on RGBWCLA seven colors in one can adjust any two LED chips in the LED light source to mix the colors between the two colors;

Preferably, an LED full-spectrum color mixing method based on RGBWCLA seven colors in one, any three or more LED chips in the LED light source will mix three or more arbitrary colors that make up the chromaticity space in the CIE1976 chromaticity diagram;

Preferably, a LED full-spectrum color mixing method based on RGBWCLA seven colors in one, seven-color wave The long color temperatures are: R: 620-630nm, G: 520-535nm, B: 450-465nm, C: 490-510nm, L: 560-570nm, A: 1750-1820K, W: 3000K-6500K;

Preferably, a LED full-spectrum color mixing method based on RGBWCLA seven colors in one. Each color mixing module at least includes an LED light source, a PCB board and an optical lens. The light emitted by the LED light source is mixed through the optical lens to achieve the target color;

Preferably, a LED full-spectrum color mixing method based on RGBWCLA seven colors in one, the correlated color temperature range of the white light mixed by the color mixing module is 1800-8000K, the color rendering index Ra>90, R9>90;

Preferably, an LED full-spectrum color mixing method based on RGBWCLA seven colors in one, the above are all inside the LED lighting equipment!

Due to the use of the above technical solutions, the present invention has the following beneficial effects:

Based on the RGBWCLA seven-color LED full-spectrum color mixing method, compared with RGB-integrated LEDs or more RGBW-integrated LEDs on the market, the chromaticity space of the CIE1976 chromaticity diagram is larger;

The spectrum of the mixed white light can achieve full-spectrum white light, and the quality of the mixed white light is also better. The color rendering index can achieve Ra>95 and R9>90.

Description of the drawings

Figure 1 shows an exploded view of a single color mixing module of the present invention;

Figure 2 shows the spectral distribution diagram of RGBWCLA seven-color LED mixed white light in an embodiment of the present invention;

Figure 3 shows a comparison chart between the RGBWCLA seven-color LED and the traditional four-color and three-color spectrum CIE1976 chromaticity diagram in the embodiment of the present invention;

Figure 4 shows an LED two-color mixed light color gamut diagram of RGBWCLA seven colors in one according to the embodiment of the present invention;

Figure 5 shows an LED two-color mixed light path diagram of RGBWCLA seven colors in one in an embodiment of the present invention;

Figure 6 shows a white light correlated color temperature diagram in an embodiment of the present invention;

Figure 7 shows the detection chart of the color rendering index of mixed white light in the embodiment of the present invention.

Detailed ways

The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, as long as there is no conflict, the following embodiments and the features in the embodiments can be combined with each other.

It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the drawings only show the components related to the present invention and do not follow the number, shape and number of components during actual implementation. Dimension drawing, in actual implementation, the type, quantity and proportion of each component can be arbitrarily changed, and the component layout type may also be more complex.

Please refer to Figure 1. The present invention provides a LED full-spectrum color mixing method based on RGBWCLA seven colors in one, as follows:

a. The color mixing of LED lighting fixtures requires at least one module, as shown in Figure 1; it mainly includes RGBWCLA seven-color LED light source (2), PCB board for welding light source (1) and light extraction lens (3);

b. In this example, the colors selected are: R: 620-630nm, G: 520-535nm, B: 450-465nm, C: 490-510nm, L: 560-570nm, A: 1820K, W: 4500K chip, The LED light source used to package this example has three primary colors, three complementary colors and white balance, which effectively increases the chromaticity space of the light source itself, as shown in Figure 3, comparing the traditional three colors with the chromaticity space of the present invention. In CIE1976;

c.RGBWCLA seven-color-in-one LED light source (2) can emit light through the optical lens (3) Effective mixing to achieve the target color, the optical path diagram is shown in Figure 5;

d. In this example, the mixed light of two colors C and R is used as color mixing. As shown in the CIE1976 chromaticity diagram in Figure 4, the line connecting the two colors is a dotted line, and the color at any point on the line is achievable;

e. The way to implement the above steps is through PWM dimming, that is, the color on this line can be described by the duty cycle of C and R, and the corresponding DMX512 is the gray scale value of R and C;

f. In steps d and e, if the brightness of C is high, that means the gray scale or duty cycle of C is higher, the color is closer to C, and vice versa;

g. In steps d, e, and f, this example shows the color mixing methods of R and C. The corresponding light path diagram is shown in Figure 5;

h. The method of mixing white light is similar to the above steps d, e, f, and g. The seven colors with different gray scale values can mix white light with different correlated color temperatures. The black body curve of white light is shown in Figure 6 (601). The achieved white light color temperature range is 1800-8000K!

i. As shown in step h, the spectrum of mixed-color white light is the full spectrum, as shown in Figure 2;

j. As shown in steps h and j, the color rendering index detection of mixed-color white light is shown in Figure 7. The quality of white light is better.

The above embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

An LED full-spectrum color mixing method based on RGBWCLA seven-color integration. The specific method is to provide at least one color mixing module. Each color mixing module includes an RGBWCLA seven-color LED light source, a PCB board (1) for welding the light source, and an optical lens (3) provided with each LED light source (2). The color of the LED light source is seven colors. It adopts PWM dimming mode. By adjusting the duty cycle of each color of R, G, B, W, C, L, and A, the target color or white light is mixed. The target color or white light is mixed. The numerical relationship between the chromaticity coordinates and the seven colors can be adjusted through DMX512 control. The grayscale values of the seven colors correspond to the duty cycle relationship of the target color or white light. Ignite any seven single chips in the LED light source to get the color emitted by the LED chip; ignite any two LED chips in the LED light source and the color between the two colors will be mixed; ignite any three or more of the LED light sources Multiple LED chips will mix three or more arbitrary colors that make up the chromaticity space in the CIE1976 chromaticity diagram. Through the present invention, a wider color gamut area can be achieved, the correlated color temperature range of the mixed white light is wider, the spectrum of the mixed white light can realize full spectrum white light, the quality of the mixed white light is also better, and the color rendering index can realize Ra>95. R9>90.
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claim 1, the seven LED chips (3) are three primary colors RGB, three complementary colors CLA and white balance W. In the CIE1976 chromaticity diagram, the color gamut coverage The efficiency is greater, and the choice of white light can effectively increase the brightness;
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claim 1, using PWM dimming method to adjust the duty cycle of R, G, B, W, C, L, A LED chips respectively. Adjust the brightness of each color to meet the requirements of the target color, and adjust the duty cycle and brightness or current value of the seven colors respectively;
An LED full-spectrum hybrid based on RGBWCLA seven colors in one according to claims 1 and 3 Color method, PWM dimming method adjusts the duty cycle of R, G, B, W, C, L, A LED chips respectively, which is the basic color of the target color, and obtains high-quality target color through the mixing method of the lens;
According to the LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claims 1, 3, and 4, any two LED chips in the LED light source can be adjusted to mix the colors between the two colors;
According to the LED full spectrum color mixing method based on RGBWCLA seven colors in one according to claims 1, 3 and 4, any three or more LED chips in the LED light source will mix three or more to form the CIE1976 chromaticity diagram Any color in medium chromaticity space;
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claims 1 and 2. The seven wavelength color temperatures are: R: 620-630nm, G: 520-535nm, B: 450-465nm, C: 490 -510nm,L:560-570nm,A:1750-1820K,W:3000K-6500K;
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claim 1. Each color mixing module at least includes an LED light source, a PCB board and an optical lens. The light emitted by the LED light source is mixed through the optical lens to achieve the goal. color;
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claim 1, the white light mixed by the color mixing module has a correlated color temperature range of 1800-8000K, a color rendering index Ra>90, and R9>90;
An LED full-spectrum color mixing method based on RGBWCLA seven colors in one according to claim 1, all of the above are inside the LED lighting equipment.