Method for adjusting light emitting system and light emitting system

Abstract

To provide a method for adjusting a light-emitting system. Specifically, a required target color temperature is selected within a very wide color temperature range, and mixed light conforming to the target color temperature is provided, thereby providing an excellent lighting effect with high color rendering properties, a low color deviation value, and a low color tolerance.SOLUTION: The light-emitting system includes a plurality of light-emitting elements and a control circuit. Each light emitting element has a light emission setting value. In the adjustment method, relevant values between the target color temperature and the luminous setting value are established based on the target color temperature between 1000K and 12000K, and the relevant values are summed to calculate a ratio of each relevant value. The light emitting power of each light emitting element is set according to the ratio corresponding to each light emitting element. Thus, the mixed light meeting the target color temperature is provided. The mixed light has a color rendering index Ra> 90.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a method for adjusting a lighting system and a lighting system, and more particularly to a method for adjusting light provided by a lighting system to a target color temperature. [Background technology]

[0002] As lighting technology matures, manufacturers are increasingly placing stricter requirements on various lighting parameters to tailor products to specific applications. Light color temperature is an important parameter, allowing for adjustments to suit different situations. Natural light at dusk and candlelight are classified as low color temperatures. This type of light has a relaxing effect and promotes the normal secretion of melatonin, which aids sleep. Therefore, it is widely used in parks, cafes, and bedrooms. Soft, neutral color temperature light creates a sense of calm and comfort and reduces eye strain even after prolonged use, making it popular in spaces such as study rooms, offices, hospitals, museums, and hotels. Bright light with a high color temperature enhances concentration and creates an energetic mood, making it popular in classrooms, conference rooms, gyms, and other settings requiring intense concentration.

[0003] When selecting lighting fixtures, it is possible to adopt a lighting system with a fixed color temperature depending on the space in which it is used. However, even in the same space, different people and times of day often have different usage needs. For example, in a home environment, the color temperature required when waking up or before going to bed is different from the color temperature required for reading, working, and eating at home. To accommodate more diverse uses with a single lighting system, the industry is developing a single lighting system that can provide light at two or more color temperatures. This meets consumers' color temperature needs at different times and places and reduces the space wasted by installing multiple lighting systems in the same space.

[0004] Currently, there are many lighting systems on the market that can switch between different color temperatures. For example, there are lighting systems that can switch between low and high color temperatures between 3000K and 5000K. However, conventional lighting systems can only switch between these two color temperatures, and the adjustable color temperature range is narrow. Expanding the adjustable color temperature range would cause the lighting fixture's color deviation value (Duv) to exceed the 7-step MacAdam ellipse (7-step MAE). Another known lighting system uses blue, red, and white light-emitting diodes (LEDs) to adjust the color temperature, but this system cannot achieve ideal color rendering when providing mixed light with a high color temperature.

[0005] Therefore, there is an urgent need in the industry to develop a method for adjusting color temperature within a wide range that can be applied to a single lighting system, so that the illumination provided by the lighting system can maintain good color rendering and avoid color distortion. Summary of the Invention

[0006] The objective of the present invention is to provide a method for adjusting a lighting system, which allows a user to select a desired target color temperature within a very wide color temperature range, provide mixed light that matches the target color temperature, and provide an excellent lighting effect with high color rendering, low color deviation, and low color tolerance.

[0007] To achieve the above object, the present invention discloses a method for adjusting a lighting system including a plurality of light-emitting elements, the method comprising the steps of: setting a target color temperature between 1000K and 12000K, establishing correlation values ​​between the target color temperature and light-emitting setting values ​​of each of the light-emitting elements, calculating a sum of the correlation values, calculating correlation ratios of each of the correlation values ​​to the sum, and setting the light-emitting power of each of the light-emitting elements based on the correlation ratios to provide mixed light.

[0008] In an embodiment, each of the emission settings includes at least one of a color coordinate and a waveband setting.

[0009] In an embodiment, the light emitting element is a first light emitting element, a second light emitting element, a third light emitting element, a fourth light emitting element, or a combination thereof, and the light emission setting value of the first light emitting element includes first color coordinates, which have a chromaticity x value of 0.16 to 0.22 and a chromaticity y value of 0.23 to 0.3 in the 1931 CIE chromaticity diagram; the light emission setting value of the second light emitting element includes second color coordinates, which have a chromaticity x value of 0.37 to 0.47 and a chromaticity y value of 0.36 to 0.43 in the 1931 CIE chromaticity diagram; the light emission setting value of the third light emitting element includes third color coordinates, which have a chromaticity x value of 0.53 to 0.6 and a chromaticity y value of 0.4 to 0.45 in the 1931 CIE chromaticity diagram; and the light emission setting value of the fourth light emitting element includes fourth color coordinates, which have a chromaticity x value of 0.53 to 0.6 and a chromaticity y value of 0.4 to 0.45 in the 1931 CIE chromaticity diagram. On the CIE chromaticity diagram, the chromaticity x value is 0.645 to 0.68, and the chromaticity y value is 0.32 to 0.335.

[0010] In an embodiment, the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate are connected by a plurality of line segments to form a rectangle in the 1931 CIE chromaticity diagram, and the mixed light has mixed light color coordinates in the 1931 CIE chromaticity diagram, and the mixed light color coordinates are located within the rectangle.

[0011] In an embodiment, the emission setting value of the first light-emitting element includes a first wavelength band setting value, and when the first wavelength band setting value is 450 nm to 460 nm, the emission intensity of the first light-emitting element is 80% or more of the maximum emission intensity of the first light-emitting element; the emission setting value of the second light-emitting element includes a second wavelength band setting value, and when the second wavelength band setting value is 620 nm to 640 nm, the emission intensity of the second light-emitting element is the maximum emission intensity of the second light-emitting element; the emission setting value of the third light-emitting element includes a third wavelength band setting value, and when the third wavelength band setting value is 590 nm to 630 nm, the emission intensity of the third light-emitting element is 80% or more of the maximum emission intensity of the third light-emitting element; and the emission setting value of the fourth light-emitting element includes a fourth wavelength band setting value, and when the fourth wavelength band setting value is 620 nm to 650 nm, the emission intensity of the fourth light-emitting element is 80% or more of the maximum emission intensity of the fourth light-emitting element.

[0012] In an embodiment, the color deviation value (Duv) of the mixed light lies within a target 7-step MacAdam Ellipse where the mixed light color coordinates correspond to a target color temperature.

[0013] In an embodiment, in the step of establishing a correlation value between the target color temperature and the emission setting value of each of the light-emitting elements, the target color temperature is connected to the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate on a 1931 CIE chromaticity diagram to obtain a first line segment, a second line segment, a third line segment, and a fourth line segment, and each of the correlation values ​​of each of the light-emitting elements is positively correlated with the length of each of the line segments.

[0014] In an embodiment, each said associated ratio is positively correlated with a corresponding each said luminous power.

[0015] In an embodiment, the mixed light has a color rendering index (CRI) of Ra>90 and R9>50.

[0016] In an embodiment, when the light emitting power of the third light emitting element and the light emitting power of the fourth light emitting element are 0, the target color temperature range is from 3000K to 6500K.

[0017] In an embodiment, when the light emitting power of the first light emitting element and the light emitting power of the fourth light emitting element are 0, the range of the target color temperature is from 2200K to 3000K.

[0018] To achieve the above object, the present invention further discloses a light emitting system including a first light emitting element, a second light emitting element, a third light emitting element, a fourth light emitting element, and a control circuit. The first light emitting element provides a first color light, which has a first color coordinate system represented by a chromaticity x value of 0.16 to 0.22 and a chromaticity y value of 0.23 to 0.3 on the 1931 CIE chromaticity diagram, and the emission intensity of the first light emitting element is 80% or more of the maximum emission intensity of the first light emitting element when the wavelength of the first color light is 450 to 460 nm. The second light emitting element provides a second color light, which has a second color coordinate system represented by a chromaticity x value of 0.37 to 0.47 and a chromaticity y value of 0.36 to 0.43 on the 1931 CIE chromaticity diagram, and the emission intensity of the second light emitting element is the maximum emission intensity of the second light emitting element when the wavelength of the second color light is 620 to 640 nm. The third light-emitting element provides a third color light, which has a chromaticity x value of 0.53 to 0.6 and a chromaticity y value of 0.4 to 0.45 in the 1931 CIE chromaticity diagram, and when the wavelength of the third color light is 590 nm to 630 nm, the emission intensity of the third light-emitting element is 80% or more of the maximum emission intensity of the third light-emitting element. The fourth light-emitting element provides a fourth color light, which has a chromaticity x value of 0.645 to 0.68 and a chromaticity y value of 0.32 to 0.335 in the 1931 CIE chromaticity diagram, and when the wavelength of the fourth color light is 620 nm to 650 nm, the emission intensity of the fourth light-emitting element is 80% or more of the maximum emission intensity of the fourth light-emitting element. The control circuit provides a first light emitting power ratio signal to the first light emitting element to cause the first light emitting element to provide the first color light, a second light emitting power ratio signal to the second light emitting element to cause the second light emitting element to provide the second color light, a third light emitting power ratio signal to the third light emitting element to cause the third light emitting element to provide the third color light, and a fourth light emitting power ratio signal to the fourth light emitting element to cause the fourth light emitting element to provide the fourth color light, based on the target color temperature, the chromaticity x value, and the chromaticity y value, and the target color temperature is 1000K to 12000K.

[0019] Those skilled in the art can understand other objects of the present invention, as well as the technical means and embodiments of the present invention, by referring to the drawings and the embodiments described below. [Brief explanation of the drawings]

[0020] [Figure 1] Schematic diagram showing a light-emitting system according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram showing the relationship between the target color temperature in the 1931 CIE chromaticity diagram including the blackbody locus and the light emission setting value of each light-emitting element when the target color temperature is 10,000 K in a light-emitting system according to an embodiment of the present invention. [Figure 3] FIG. 1 is a schematic diagram showing the adjustable target color temperature range on the 1931 CIE chromaticity diagram including the blackbody locus in a light-emitting system according to an embodiment of the present invention. [Figure 4A] 1 is a schematic diagram illustrating different wavelengths of the first color light of the first light-emitting element of the light-emitting system according to an embodiment of the present invention and the corresponding light-emitting intensity; [Figure 4B] 1 is a schematic diagram illustrating different wavelengths of the second color light of the second light-emitting element of the light-emitting system according to an embodiment of the present invention and the corresponding light-emitting intensity; [Figure 4C] 1 is a schematic diagram showing different wavelengths of the third color light of the third light-emitting element of the light-emitting system according to an embodiment of the present invention and the corresponding light-emitting intensity; [Figure 4D] FIG. 10 is a schematic diagram showing different wavelengths of the fourth color light of the fourth light-emitting element of the light-emitting system according to the embodiment of the present invention and the corresponding light-emitting intensity; [Figure 5A] FIG. 1 is a schematic diagram showing a color temperature range of 2200 K to 3000 K on the 1931 CIE chromaticity diagram including the blackbody locus in a light-emitting system according to an embodiment of the present invention. [Figure 5B] Schematic diagram showing the color temperature range of 3000K to 6500K on the 1931 CIE chromaticity diagram including the blackbody locus in the light-emitting system according to the embodiment of the present invention. [Figure 6] Schematic diagram showing color deviation values ​​and color tolerances in the 1931 CIE chromaticity diagram at different target color temperatures in a light-emitting system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present invention will be described below through examples. Note that the examples of the present invention are merely examples of embodiments and are not intended to limit the present invention to the environments, applications, or specific aspects described in the examples. Therefore, the explanation of the examples is intended to explain the present invention, but does not limit the present invention. Note that components not directly related to the present invention are omitted and not shown in the embodiments and drawings. The dimensional relationships between the components in the drawings are intended to facilitate understanding and do not limit the actual dimensions.

[0022] An embodiment of the present invention is shown in Figures 1 to 6. As shown in Figure 1, a light emitting system 1 of this embodiment includes a first light emitting element 101, a second light emitting element 103, a third light emitting element 105, a fourth light emitting element 107, and a control circuit 109.

[0023] The first light emitting element 101 provides a first color light. The first color light has a first light emission setting value. The first light emission setting value includes a chromaticity x value and a chromaticity y value of the first color coordinates of the first color light as displayed on the 1931 CIE chromaticity diagram. In this embodiment, the chromaticity x value of the first color coordinates of the first color light ranges from 0.16 to 0.22, and the chromaticity y value ranges from 0.23 to 0.3.

[0024] The second light emitting element 103 provides a second color light. The second color light has a second light emission setting value. The second light emission setting value includes a chromaticity x value and a chromaticity y value of the second color coordinates of the second color light as displayed on the 1931 CIE chromaticity diagram. In this embodiment, the chromaticity x value of the second color coordinates of the second color light ranges from 0.37 to 0.47, and the chromaticity y value ranges from 0.36 to 0.43.

[0025] The third light emitting element 105 provides a third color light. The third color light has a third light emission setting value. The third light emission setting value includes a chromaticity x value and a chromaticity y value of the third color coordinates of the third color light as displayed on the 1931 CIE chromaticity diagram. In this embodiment, the chromaticity x value of the third color coordinates of the third color light ranges from 0.53 to 0.6, and the chromaticity y value ranges from 0.4 to 0.45.

[0026] The fourth light emitting element 107 provides a fourth color light. The fourth color light has a fourth light emission setting value. The fourth light emission setting value includes a chromaticity x value and a chromaticity y value of the fourth color coordinates of the fourth color light displayed on the 1931 CIE chromaticity diagram. In this embodiment, the chromaticity x value of the fourth color coordinates of the fourth color light ranges from 0.645 to 0.68, and the chromaticity y value ranges from 0.32 to 0.335.

[0027] When adjusting the lighting system 1, a target color temperature is first set. The target color temperature is between 1000K and 12000K. The control circuit 109 establishes associated values ​​corresponding to the first LEE 101, the second LEE 103, the third LEE 105, and the fourth LEE 107 based on the target color temperature, the light emission setting value of the first LEE 101, the light emission setting value of the second LEE 103, the light emission setting value of the third LEE 105, and the light emission setting value of the fourth LEE 107. These associated values ​​are summed to obtain a total value. Next, the control circuit 109 calculates an associated ratio of each associated value of each LEE 101 to the total value. Next, the control circuit 109 provides a first light emission power ratio signal to the first LEE 101 based on the associated ratios, causing the first LEE 101 to provide the first color light. The control circuit 109 provides a second light emission power ratio signal to the second LEE 103, causing the second LEE 103 to provide the second color light. The third light emitting power ratio signal is provided to the third light emitting element 105, causing the third light emitting element 105 to provide the third color light. The fourth light emitting power ratio signal is provided to the fourth light emitting element 107, causing the fourth light emitting element 107 to provide the fourth color light. The first color light, the second color light, the third color light, and the fourth color light provided by the light emitting elements are mixed to obtain a mixed light. The color rendering index (CRI) of the mixed light is then calculated. The color rendering index (CRI) is Ra>90 and R9>50.

[0028] 2 is a schematic diagram showing the relationship between the target color temperature and the light emission setting value of each light-emitting element in the 1931 CIE chromaticity diagram including the blackbody locus when the target color temperature is 10,000 K in the light-emitting system 1 according to the embodiment of the present invention. Specifically, when the target color temperature is 10,000 K, the position displayed on the chromaticity diagram is the target color temperature color coordinate Z. The position displayed on the chromaticity diagram of the first color light provided by the first light-emitting element 101 is the first color coordinate A. The position displayed on the chromaticity diagram of the second color light provided by the second light-emitting element 103 is the second color coordinate B. The position displayed on the chromaticity diagram of the third color light provided by the third light-emitting element 105 is the third color coordinate C. The position displayed on the chromaticity diagram of the fourth color light provided by the fourth light-emitting element 107 is the fourth color coordinate D.

[0029] In the adjustment method, the target color temperature color coordinate Z is connected to the first color coordinate A, the second color coordinate B, the third color coordinate C, and the fourth color coordinate D, respectively, to obtain the relationship between the target color temperature of 10,000 K and the light-emitting setting values ​​of each light-emitting element (i.e., the first color coordinate A, the second color coordinate B, the third color coordinate C, and the fourth color coordinate D). This relationship is the first line segment ZA, the second line segment ZB, the third line segment ZC, and the fourth line segment ZD. The lengths of these four line segments are summed to obtain a line segment total. Next, the relationship ratios of the length of the first line segment ZA, the length of the second line segment ZB, the length of the third line segment ZC, and the length of the fourth line segment ZD to the line segment total are calculated, respectively. Finally, each light-emitting element is set based on the relationship ratios of each line segment length to provide the first color light, the second color light, the third color light, and the fourth color light with the corresponding light-emitting power ratios. The mixed color light provided by the luminous power of the above ratio meets the required target color temperature of 10,000 K. The color rendering index (CRI) of the light is Ra>90, R9>50.

[0030] In the light-emitting system 1 of the above embodiment, each color light is emitted by one light-emitting element. However, in other embodiments of the present invention, a plurality of first light-emitting elements 101 may be used to provide the first color light, a plurality of second light-emitting elements 103 may be used to provide the second color light, a plurality of third light-emitting elements 105 may be used to provide the third color light, and a plurality of fourth light-emitting elements 107 may be used to provide the fourth color light. Note that the chromaticity x and chromaticity y values ​​of the first color coordinates, the chromaticity x and chromaticity y values ​​of the second color coordinates, the chromaticity x and chromaticity y values ​​of the third color coordinates, the chromaticity x and chromaticity y values ​​of the fourth color coordinates, and the wavelength band setting values ​​are examples of this embodiment. In other embodiments of the present invention, light-emitting elements may be selected that are slightly different from the values ​​in the above embodiment.

[0031] As shown in FIG. 3 , when the first color coordinate of the first light-emitting element 101, the second color coordinate of the second light-emitting element 103, the third color coordinate of the third light-emitting element 105, and the fourth color coordinate of the fourth light-emitting element 107 are connected with a number of line segments, a rectangle is formed, i.e., the dotted line portion in FIG. 3 . The mixed light obtained by combining the first color light, the second color light, the third color light, and the fourth color light provided by the light-emitting system 1 has mixed light color coordinates on the 1931 CIE chromaticity diagram. The mixed light color coordinates are located within the dotted line rectangle.

[0032] The first, second, third, and fourth emission setting values ​​used to establish the above-mentioned correlation values ​​respectively include the chromaticity x and chromaticity y values ​​of the first color coordinates, the chromaticity x and chromaticity y values ​​of the second color coordinates, the chromaticity x and chromaticity y values ​​of the third color coordinates, and the chromaticity x and chromaticity y values ​​of the fourth color coordinates. In this embodiment, the first, second, third, and fourth emission setting values ​​may further include the relationship between the wavelength and emission intensity of the first color light, the relationship between the wavelength and emission intensity of the second color light, the relationship between the wavelength and emission intensity of the third color light, and the relationship between the wavelength and emission intensity of the fourth color light.

[0033] 4A to 4D are schematic diagrams showing the light emission intensities of the first light emitting element 101, the second light emitting element 103, the third light emitting element 105, and the fourth light emitting element 107, respectively, when providing different wavelengths in this embodiment. The first light emission setting value in this embodiment further includes a first waveband setting value for the wavelength and light emission intensity of the first color light. The second light emission setting value further includes a second waveband setting value for the wavelength and light emission intensity of the second color light. The third light emission setting value further includes a third waveband setting value for the wavelength and light emission intensity of the third color light. The fourth light emission setting value further includes a fourth waveband setting value for the wavelength and light emission intensity of the fourth color light.

[0034] The relationship between the wavelength and emission intensity of the first colored light will be described for the spectrum shown in FIG. 4A. When the first wavelength band setting value is 450 nm to 460 nm, the emission intensity of the first light emitting element 101 is 80% or more of the maximum emission intensity of the first light emitting element 101. When the first wavelength band setting value is 460 nm to 470 nm, the emission intensity of the first light emitting element 101 is 60% to 80% of the maximum emission intensity of the first light emitting element 101. When the first wavelength band setting value is 490 nm to 530 nm, the emission intensity of the first light emitting element 101 is 40% to 60% of the maximum emission intensity of the first light emitting element 101. When the first wavelength band setting value is 540 nm to 560 nm, the emission intensity of the first light emitting element 101 is 20% to 40% of the maximum emission intensity of the first light emitting element 101. When the first wavelength band setting value is 580 nm or more, the emission intensity of the first light emitting element 101 is 20% or less of the maximum emission intensity of the first light emitting element 101. The relationship between the wavelength and emission intensity of the second color light will be described for the spectrum shown in FIG. 4B. When the second wavelength band setting value is 620 nm to 640 nm, the emission intensity of the second light emitting element 103 is the maximum emission intensity of the second light emitting element 103. When the second wavelength band setting value is 400 nm to 500 nm, the emission intensity of the second light emitting element 103 is 30% or less of the maximum emission intensity of the second light emitting element 103. When the second wavelength band setting value is 500 nm to 600 nm, the emission intensity of the second light emitting element 103 is 5% to 30% of the maximum emission intensity of the second light emitting element 103. When the second wavelength band setting value is 600 nm to 620 nm, the emission intensity of the second light emitting element 103 is 40% to the maximum emission intensity of the second light emitting element 103. When the second wavelength band setting value is 640 nm to 650 nm, the emission intensity of the second light emitting element 103 is 20% to 30% of the maximum emission intensity of the second light emitting element 103. The relationship between the wavelength and emission intensity of the third color light will be described for the spectrum shown in Figure 4C. When the third wavelength band setting value is 590 nm to 630 nm, the emission intensity of the third light emitting element 105 is 80% or more of the maximum emission intensity of the third light emitting element 105. When the third wavelength band setting value is 410 nm to 470 nm, the emission intensity of the third light emitting element 105 is 1% to 5% of the maximum emission intensity of the third light emitting element 105. The relationship between the wavelength and emission intensity of the fourth color light will be described for the spectrum shown in Figure 4D.When the fourth wavelength band setting value is 620 nm to 650 nm, the emission intensity of the fourth light emitting element 107 is 80% or more of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is 580 nm or less, the emission intensity of the fourth light emitting element 107 is 20% or less of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is 590 nm to 600 nm, the emission intensity of the fourth light emitting element 107 is 20% to 60% of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is 600 nm to 610 nm, the emission intensity of the fourth light emitting element 107 is 40% to 80% of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is 660 nm to 670 nm, the emission intensity of the fourth light emitting element 107 is 40% to 80% of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is from 680 nm to 700 nm, the emission intensity of the fourth light emitting element 107 is 20% to 40% of the maximum emission intensity of the fourth light emitting element 107. When the fourth wavelength band setting value is from 710 nm to 810 nm, the emission intensity of the fourth light emitting element 107 is 20% or less of the maximum emission intensity of the fourth light emitting element 107.

[0035] Table 1 below lists the luminous power provided by the first light emitting element 101 to the fourth light emitting element 107 at different target color temperatures. As shown in the table, the lighting system 1 of this embodiment can provide continuous dimming from 1000K to 12000K. In practical applications, a color temperature of 100K is used as one interval. A target color temperature setting of 2700K can provide light similar to sunrise or dusk. A target color temperature setting of 3500K can provide light similar to early morning light. A target color temperature setting of 4000K can provide light similar to moonlight. A target color temperature setting of 5000K can provide light similar to cloudy day light. A target color temperature setting of 6000K can provide light similar to clear midday light. [Table 1]

[0036] As can be seen from Table 1 above, when the lighting system 1 of this embodiment uses the first LIGHT EMITTING ELEMENT 101, the second LIGHT EMITTING ELEMENT 103, the third LIGHT EMITTING ELEMENT 105, and the fourth LIGHT EMITTING ELEMENT 107 to provide mixed light that meets the target color temperature, if the luminous power of the first LIGHT EMITTING ELEMENT 101 is much greater than the luminous power of the second LIGHT EMITTING ELEMENT 103, the luminous power of the third LIGHT EMITTING ELEMENT 105, and the luminous power of the fourth LIGHT EMITTING ELEMENT 107, the upper limit of the target color temperature is 12,000 K. If the luminous power of the second LIGHT EMITTING ELEMENT 103 is much greater than the luminous power of the first LIGHT EMITTING ELEMENT 101, the luminous power of the third LIGHT EMITTING ELEMENT 105, and the luminous power of the fourth LIGHT EMITTING ELEMENT 107, the target color temperature is 3,000 K. If the luminous power of the third LIGHT EMITTING ELEMENT 105 is much greater than the luminous power of the first LIGHT EMITTING ELEMENT 101, the luminous power of the second LIGHT EMITTING ELEMENT 103, and the luminous power of the fourth LIGHT EMITTING ELEMENT 107, the lower limit of the target color temperature is 1,800 K. When the light emitting power of the fourth light emitting element 107 is much greater than the light emitting power of the first light emitting element 101, the light emitting power of the second light emitting element 103, and the light emitting power of the third light emitting element 105, the lower limit of the target color temperature is 1000K.

[0037] When a light emitting system is actually applied to lighting, the color temperatures commonly used in living environments are between 2200 K and 6500 K. The light emitting system 1 of this embodiment can provide mixed light with a target color temperature that suits most usage situations by using only the first light emitting element 101 and the second light emitting element 103, or only the first light emitting element 101 and the fourth light emitting element 107.

[0038] Specifically, as shown in the chromaticity diagram of FIG. 5A, when only the first and second light-emitting elements 101 and 103 of the lighting system 1 of this embodiment are used to provide light, the light-emitting power of the third and fourth light-emitting elements 105 and 107 are both 0. The target color temperature range that the lighting system 1 can provide is from 3000K to 6500K. After selecting a target color temperature within this range, adjustments can be made to set the first and second light-emitting elements 101 and 103 to appropriate light-emitting powers (e.g., as exemplified in the table above) to provide mixed light that matches the target color temperature. Note that when the target color temperature is 3000K, only the second light-emitting element 103 provides light. Therefore, when the light-emitting power of the first light-emitting element 101 is greater than that of the second light-emitting element 103, the upper limit of the target color temperature is 6500K. When the light-emitting power of the first light-emitting element 101 is less than that of the second light-emitting element 103, the lower limit of the color temperature is 3000K.

[0039] As shown in the chromaticity diagram of FIG. 5B , when only the second and third light-emitting elements 103 and 105 of the lighting system 1 of this embodiment are used to provide light, the light-emitting power of the first and fourth light-emitting elements 101 and 107 are both 0. The target color temperature range that the lighting system 1 can provide is from 2200 K to 3000 K. After selecting a target color temperature within this range, adjustments can be made to set the second and third light-emitting elements 103 and 105 to appropriate light-emitting powers (e.g., as exemplified in the table above) to provide mixed light that matches the target color temperature. Similarly, when the target color temperature is 3000 K, only the second light-emitting element 103 provides light. Therefore, when the light-emitting power of the second light-emitting element 103 is greater than that of the third light-emitting element 105, the upper limit of the target color temperature is 3000 K. When the light-emitting power of the second light-emitting element 103 is less than that of the third light-emitting element 105, the lower limit of the color temperature is 2200 K.

[0040] The distance between the color temperature of light and the blackbody locus (or Planckian locus) indicates the difference in how the human eye perceives objects. The color deviation value (Duv) of the mixed light in this embodiment of the present invention is located within the target 7-step MacAdam ellipse (7-step MacAdam ellipse) corresponding to the target color temperature. As shown in the 1931 CIE chromaticity diagram in Figure 6, when the target color temperature is set to 2700K, 3000K, 3500K, 4000K, 5000K, or 6500K, the 7-step MacAdam ellipses (7-step MAE) corresponding to each target color temperature are as shown in the diagram. In other words, the color coordinates of the mixed light in this embodiment fall within the seven MacAdam ellipses of the blackbody locus. Figure 6 also shows the color tolerance of the mixed light in this embodiment. The color tolerance range of the mixed light is indicated by multiple rectangles. The color temperatures corresponding to these rectangles, 2700K, 3000K, 3500K, 4000K, 4500K, 5000K, 5700K, and 6500K, are the nominal correlated color temperatures (CCT) currently standardized in the United States. Table 2 lists the color tolerance coordinates for 2700K, 3500K, 4000K, 5000K, and 6500K. From the above content and table, it can be seen that the mixed light provided by this embodiment has no obvious color difference when viewed with the naked eye by an average user. [Table 2]

[0041] To summarize, the present invention allows users to select and adjust a target color temperature within the entire color temperature range using a single lighting system. The adjusted mixed light not only matches the target color temperature, but also has a color rendering index (CRI) exceeding 90 (Ra>90). It also exhibits excellent saturation red display capability (R9>50). This allows for highly accurate reproduction of object colors under illumination by the lighting system of the present invention. Furthermore, the color deviation (Duv) and color tolerance of the mixed light provided by the lighting system of the present invention are extremely small relative to the blackbody locus, within a range that is imperceptible to the naked eye. Therefore, when illuminated with mixed light of various color temperatures provided by the lighting system of the present invention, the illuminated object will exhibit the most realistic colors.

[0042] The above examples are intended to explain embodiments of the present invention and to explain the characteristic configurations of the present invention. The present invention is not limited to the above examples. Modifications or equivalent arrangements that can be easily made by those skilled in the art are also within the scope of the present invention. The scope of protection of the rights of the present invention is based on the claims. [Explanation of symbols]

[0043] 1 Lighting system 101 first light-emitting element 103 second light-emitting element 105 third light-emitting element 107 Fourth light-emitting element 109 Control circuit Z Target color temperature color coordinates A First color coordinate B Second color coordinates C third color coordinate D 4th color coordinate ZA 1st line segment ZB Second line segment ZC Third line segment ZD 4th line segment

Claims

1. 1. A method for adjusting a lighting system including a plurality of light-emitting elements, comprising: setting a target color temperature between 1000K and 12000K; establishing a correlation between the target color temperature and a light emitting setting value of each of the light emitting elements; calculating a sum of said related values; calculating a respective relative ratio of each of said relative values ​​to said total value; and setting the light emitting power of each of the light emitting elements based on each of the associated ratios to provide a mixed light.

2. The method of claim 1 , wherein each of the light emission settings includes at least one of a color coordinate and a wavelength band setting.

3. the light-emitting element is a first light-emitting element, a second light-emitting element, a third light-emitting element, a fourth light-emitting element, or a combination thereof; the emission setting value of the first light-emitting element includes a first color coordinate, and the first color coordinate has a chromaticity x value of 0.16 to 0.22 and a chromaticity y value of 0.23 to 0.3 on the 1931 CIE chromaticity diagram; the emission setting value of the second light-emitting element includes second color coordinates, and the second color coordinates have a chromaticity x value of 0.37 to 0.47 and a chromaticity y value of 0.36 to 0.43 on the 1931 CIE chromaticity diagram; the light emission setting value of the third light emitting element includes third color coordinates, and the third color coordinates have a chromaticity x value of 0.53 to 0.6 and a chromaticity y value of 0.4 to 0.45 in the 1931 CIE chromaticity diagram; 3. The method of claim 2, wherein the light emission setting value of the fourth light-emitting element includes fourth color coordinates, and the fourth color coordinates have a chromaticity x value of 0.645 to 0.68 and a chromaticity y value of 0.32 to 0.335 on the 1931 CIE chromaticity diagram.

4. 4. The method of claim 3, wherein the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate are connected by a plurality of line segments to form a rectangle on the 1931 CIE chromaticity diagram, and the mixed light has mixed light color coordinates on the 1931 CIE chromaticity diagram, and the mixed light color coordinates are located within the rectangle.

5. the emission setting value of the first light-emitting element includes a first wavelength band setting value, and when the first wavelength band setting value is 450 nm to 460 nm, the emission intensity of the first light-emitting element is 80% or more of the maximum emission intensity of the first light-emitting element; the emission setting value of the second light-emitting element includes a second wavelength band setting value, and when the second wavelength band setting value is 620 nm to 640 nm, the emission intensity of the second light-emitting element is the maximum emission intensity of the second light-emitting element; the emission setting value of the third light-emitting element includes a third wavelength band setting value, and when the third wavelength band setting value is 590 nm to 630 nm, the emission intensity of the third light-emitting element is 80% or more of the maximum emission intensity of the third light-emitting element; 5. The adjustment method of claim 4, wherein the emission setting value of the fourth light-emitting element includes a fourth wavelength band setting value, and when the fourth wavelength band setting value is 620 nm to 650 nm, the emission intensity of the fourth light-emitting element is 80% or more of the maximum emission intensity of the fourth light-emitting element.

6. When the first wavelength band setting value is 460 nm to 470 nm, the emission intensity of the first light-emitting element is 60% to 80% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 490 nm to 530 nm, the emission intensity of the first light-emitting element is 40% to 60% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 540 nm to 560 nm, the emission intensity of the first light-emitting element is 20% to 40% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 580 nm or more, the emission intensity of the first light-emitting element is 20% or less of the maximum emission intensity of the first light-emitting element, When the second wavelength band setting value is 400 nm to 500 nm, the emission intensity of the second light-emitting element is 30% or less of the maximum emission intensity of the second light-emitting element, When the second wavelength band setting value is 500 nm to 600 nm, the emission intensity of the second light-emitting element is 5% to 30% of the maximum emission intensity of the second light-emitting element; When the second wavelength band setting value is 600 nm to 620 nm, the emission intensity of the second light emitting element is 40% to the maximum emission intensity of the second light emitting element, When the second wavelength band setting value is 640 nm to 650 nm, the emission intensity of the second light-emitting element is 20% to 30% of the maximum emission intensity of the second light-emitting element; When the third wavelength band setting value is 410 nm to 470 nm, the emission intensity of the third light emitting element is 1% to 5% of the maximum emission intensity of the third light emitting element; When the fourth wavelength band setting value is 580 nm or less, the emission intensity of the fourth light emitting element is 20% or less of the maximum emission intensity of the fourth light emitting element, When the fourth wavelength band setting value is 590 nm to 600 nm, the emission intensity of the fourth light emitting element is 20% to 60% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 600 nm to 610 nm, the emission intensity of the fourth light emitting element is 40% to 80% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 660 nm to 670 nm, the emission intensity of the fourth light emitting element is 40% to 80% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 680 nm to 700 nm, the emission intensity of the fourth light emitting element is 20% to 40% of the maximum emission intensity of the fourth light emitting element; 6. The adjusting method according to claim 5, wherein when the fourth wavelength band setting value is 710 nm to 810 nm, the emission intensity of the fourth light emitting element is 20% or less of the maximum emission intensity of the fourth light emitting element.

7. 7. The method of claim 6, wherein the color deviation value (Duv) of the mixed light is located within a target 7-step MacAdam ellipse where the mixed light color coordinates correspond to a target color temperature.

8. 8. The adjusting method of claim 7, wherein in the step of establishing a correlation value between the target color temperature and the light-emitting setting value of each of the light-emitting elements, the target color temperature is connected to the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate on a 1931 CIE chromaticity diagram to obtain a first line segment, a second line segment, a third line segment, and a fourth line segment, and each of the correlation values ​​of each of the light-emitting elements is positively correlated with a length of each of the line segments.

9. 9. The adjusting method according to claim 8, wherein each of the correlation ratios is positively correlated with a corresponding one of the light emitting powers.

10. 10. The adjusting method according to claim 9, wherein the color rendering index (CRI) of the mixed light is Ra>90 and R9>50.

11. 11. The adjusting method according to claim 10, wherein when the light emitting power of the third light emitting element and the light emitting power of the fourth light emitting element are 0, the target color temperature range is from 3000K to 6500K.

12. The adjusting method according to claim 11 , wherein when the light emitting power of the first light emitting element and the light emitting power of the fourth light emitting element are 0, the target color temperature ranges from 2200K to 3000K.

13. A light emitting system including a first light emitting element, a second light emitting element, a third light emitting element, a fourth light emitting element, and a control circuit, the first light-emitting element provides a first color light, the first color light being represented by a first color coordinate system in a 1931 CIE chromaticity diagram with a chromaticity x value of 0.16 to 0.22 and a chromaticity y value of 0.23 to 0.3, and when the wavelength of the first color light is 450 nm to 460 nm, the emission intensity of the first light-emitting element is 80% or more of a maximum emission intensity of the first light-emitting element; the second light-emitting element provides a second color light, the second color light being represented by a second color coordinate system in the 1931 CIE chromaticity diagram with an x ​​chromaticity value of 0.37 to 0.47 and a y chromaticity value of 0.36 to 0.43, and when the wavelength of the second color light is 620 nm to 640 nm, the emission intensity of the second light-emitting element is the maximum emission intensity of the second light-emitting element; the third light-emitting element provides a third color light, the third color light being represented by a third color coordinate system in a 1931 CIE chromaticity diagram with a chromaticity x value of 0.53 to 0.6 and a chromaticity y value of 0.4 to 0.45, and when the wavelength of the third color light is 590 nm to 630 nm, the emission intensity of the third light-emitting element is 80% or more of a maximum emission intensity of the third light-emitting element; the fourth light-emitting element provides a fourth color light, and the fourth color light has a chromaticity x value of 0.645 to 0.68 and a chromaticity y value of 0.32 to 0.335 in a fourth color coordinate system in the 1931 CIE chromaticity diagram, and when the wavelength of the fourth color light is 620 nm to 650 nm, the emission intensity of the fourth light-emitting element is 80% or more of a maximum emission intensity of the fourth light-emitting element; the control circuit provides a first light emitting power ratio signal to the first light emitting element to cause the first light emitting element to provide the first color light, a second light emitting power ratio signal to the second light emitting element to cause the second light emitting element to provide the second color light, a third light emitting power ratio signal to the third light emitting element to cause the third light emitting element to provide the third color light, and a fourth light emitting power ratio signal to the fourth light emitting element to cause the fourth light emitting element to provide the fourth color light, based on the target color temperature, the chromaticity x value, and the chromaticity y value, and the target color temperature is 1000K to 12000K.

14. 14. The light emitting system of claim 13, wherein the first color coordinate, the second color coordinate, the third color coordinate, and the fourth color coordinate are connected by a plurality of line segments to form a rectangle in the 1931 CIE chromaticity diagram, and the first color light, the second color light, the third color light, and the fourth color light are mixed to obtain mixed light, the mixed light having mixed light color coordinates in the 1931 CIE chromaticity diagram, and the mixed light color coordinates are located within the rectangle.

15. 15. The lighting system of claim 14, wherein the color deviation value (Duv) of the mixed light is located within a target 7-step MacAdam Ellipse where the mixed light color coordinates correspond to a target color temperature.

16. When the first wavelength band setting value is 460 nm to 470 nm, the emission intensity of the first light-emitting element is 60% to 80% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 490 nm to 530 nm, the emission intensity of the first light-emitting element is 40% to 60% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 540 nm to 560 nm, the emission intensity of the first light-emitting element is 20% to 40% of the maximum emission intensity of the first light-emitting element; When the first wavelength band setting value is 580 nm or more, the emission intensity of the first light-emitting element is 20% or less of the maximum emission intensity of the first light-emitting element, When the second wavelength band setting value is 400 nm to 500 nm, the emission intensity of the second light-emitting element is 30% or less of the maximum emission intensity of the second light-emitting element, When the second wavelength band setting value is 500 nm to 600 nm, the emission intensity of the second light-emitting element is 5% to 30% of the maximum emission intensity of the second light-emitting element; When the second wavelength band setting value is 600 nm to 620 nm, the emission intensity of the second light emitting element is 40% to the maximum emission intensity of the second light emitting element, When the second wavelength band setting value is 640 nm to 650 nm, the emission intensity of the second light-emitting element is 20% to 30% of the maximum emission intensity of the second light-emitting element; When the third wavelength band setting value is 410 nm to 470 nm, the emission intensity of the third light emitting element is 1% to 5% of the maximum emission intensity of the third light emitting element; When the fourth wavelength band setting value is 580 nm or less, the emission intensity of the fourth light emitting element is 20% or less of the maximum emission intensity of the fourth light emitting element, When the fourth wavelength band setting value is 590 nm to 600 nm, the emission intensity of the fourth light emitting element is 20% to 60% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 600 nm to 610 nm, the emission intensity of the fourth light emitting element is 40% to 80% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 660 nm to 670 nm, the emission intensity of the fourth light emitting element is 40% to 80% of the maximum emission intensity of the fourth light emitting element; When the fourth wavelength band setting value is 680 nm to 700 nm, the emission intensity of the fourth light emitting element is 20% to 40% of the maximum emission intensity of the fourth light emitting element; 16. The light emitting system according to claim 15, wherein when the fourth wavelength band setting value is 710 nm to 810 nm, the emission intensity of the fourth light emitting element is 20% or less of the maximum emission intensity of the fourth light emitting element.

17. 17. The light emitting system according to claim 16, wherein the mixed light has a color rendering index (CRI) of Ra>90 and R9>50.

18. 18. The lighting system according to claim 17, wherein when the light emitting power of the third light emitting element and the light emitting power of the fourth light emitting element are 0, the target color temperature range is from 3000K to 6500K.

19. 19. The lighting system according to claim 18, wherein when the light emitting power of the first light emitting element and the light emitting power of the fourth light emitting element are 0, the target color temperature range is from 2200K to 3000K.

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