A light emitting device

Abstract

The application discloses a light-emitting device which emits mixed light, wherein the mixed light is mixed by deep red light, green light, sapphire blue light and white light; the color temperature of the white light is 4000K; the main wavelength range of the deep red light is 645nm-670nm, the peak wavelength range is 650nm-675nm, and the half-peak width range is 18nm-40nm; the main wavelength range of the green light is 510nm-540nm, the peak wavelength range is 515nm-545nm, and the half-peak width range is 30nm-65nm; the main wavelength range of the sapphire blue light is 439nm-475nm, the peak wavelength range is 435nm-470nm, and the half-peak width range is 18nm-40nm; and the main wavelength range of the white light is 570nm-610nm, the peak wavelength range is 600nm-640nm, and the half-peak width range is 150nm-225nm. The light-emitting device is mainly used in the technical field of light sources.

Description

Technical Field

[0001] This invention relates to the field of light source technology, and in particular to a light-emitting device. Background Technology

[0002] Light-emitting devices used for food illumination are generally required to enhance the visual freshness of food. In existing technologies, to enhance the visual freshness of red and green fresh foods, light with a certain preferred color is generally used, but consumers can clearly perceive the unrealistic nature of this light color.

[0003] Therefore, how to achieve vivid color rendering of natural white light is a technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0004] The purpose of this invention is to provide a light-emitting device to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] The solution to the technical problem of this invention is to provide a light-emitting device that emits mixed light, wherein the mixed light is composed of four colors of light, namely: deep red light, green light, royal blue light and white light; the color temperature of the white light is 4000K.

[0006] Among them, the main wavelength range of deep red light is 645nm to 670nm, the peak wavelength range is 650nm to 675nm, and the half-peak width ranges from 18nm to 40nm.

[0007] The dominant wavelength range of green light is 510nm to 540nm, the peak wavelength range is 515nm to 545nm, and the full width at half maximum (FWHM) ranges from 30nm to 65nm.

[0008] The dominant wavelength range of sapphire blue light is 439nm to 475nm, the peak wavelength range is 435nm to 470nm, and the full width at half maximum (FWHM) ranges from 18nm to 40nm.

[0009] The dominant wavelength range of white light is 570nm to 610nm, the peak wavelength range is 600nm to 640nm, and the full width at half maximum (FWHM) range is 150nm to 225nm.

[0010] Furthermore, let a be the proportion of the actual spectral area of ​​the deep red light to the normalized area, b be the proportion of the actual spectral area of ​​the green light to the normalized area, c be the proportion of the actual spectral area of ​​the sapphire blue light to the normalized area, and d be the proportion of the actual spectral area of ​​the white light to the normalized area; then the range of a is [0.6, 0.8], the range of b is [0.1, 0.25], the range of c is [0.1, 0.25], and the range of d is [0.1, 0.3], where a + b + c + d = 1.

[0011] Furthermore, let a be the proportion of the actual spectral area of ​​the deep red light to the normalized area, b be the proportion of the actual spectral area of ​​the green light to the normalized area, c be the proportion of the actual spectral area of ​​the sapphire blue light to the normalized area, and d be the proportion of the actual spectral area of ​​the white light to the normalized area; then the range of a is [0.5, 0.7], the range of b is [0.15, 0.3], the range of c is [0.15, 0.3], and the range of d is [0.08, 0.2], where a + b + c + d = 1.

[0012] Furthermore, the value of a is 0.64, the value of b is 0.12, the value of c is 0.11, and the value of d is 0.13.

[0013] Furthermore, the value of a is 0.55, the value of b is 0.18, the value of c is 0.18, and the value of d is 0.09.

[0014] Furthermore, the ratio of a to b is greater than 3, the ratio of b to c is [0.8, 1.2], and the ratio of b to d is [0.7, 1].

[0015] Furthermore, the ratio of a to b is greater than 2.5, the ratio of b to c is [0.8, 1.2], and the ratio of b to d is [1.5, 2.5].

[0016] Furthermore, the correlated color temperature of the mixed light is 3800K to 4500K, wherein in the 16-hue ring, the h1 color partition is greater than 18%, the h16 color partition is greater than 20%, and the color fidelity Rg is greater than or equal to 100.

[0017] Furthermore, the correlated color temperature range of the mixed light is 4800K to 5500K, wherein in the 16-hue ring, the h6 color zone is greater than 12%, the h7 color zone is greater than 15%, and the color fidelity Rg is greater than or equal to 100.

[0018] Furthermore, the chromaticity coordinates of the mixed light are located in the region below the blackbody radiation curve trajectory in the CIE1931-xy chromaticity diagram, i.e., Duv < 0, and the distance between the chromaticity coordinates of the mixed light and the blackbody radiation curve trajectory is less than or equal to 5 steps.

[0019] Furthermore, the chromaticity coordinates of the mixed light are located in the region above the blackbody radiation curve trajectory in the CIE1931-xy chromaticity diagram, i.e., Duv > 0, and the distance between the chromaticity coordinates of the mixed light and the blackbody radiation curve trajectory is less than or equal to 5 steps.

[0020] Furthermore, the Ra of the mixed light is greater than 70, and the Rf is greater than 80.

[0021] The beneficial effects of this invention are as follows: By mixing four colors of light—deep red, green, royal blue, and white—and limiting the dominant wavelength, peak wavelength, and half-peak width of each color, this invention obtains mixed light that enhances the visual freshness of red and green fresh foods (such as red meat and green vegetables and fruits). This solves the problem of poor visual freshness enhancement in existing lighting for red and green fresh foods. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of the present invention, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0023] Figure 1 This is a light source selection diagram for lighting devices that enhance the freshness of food. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] It should be noted that although functional modules are divided in the system diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the system or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0026] refer to Figure 1 A light-emitting device is provided that emits mixed light. The mixed light is used to provide a better visual freshness for red and green fresh foods.

[0027] The mixed light employs a four-channel technique for mixing different colored lights. The four channels output the following colors: Deep Red, Green, Royal Blue, and White (4000K). The White light has a color temperature of 4000K. These four colors are output through the four channels and then mixed to obtain the mixed light.

[0028] For these four colors of light, it can be found from the spectral characteristics of each color that the dominant wavelength, peak wavelength and full width at half maximum (FWHM) of these four colors of light need to be limited in the spectrum.

[0029] Specifically, the main wavelength of deep red light needs to be within the range of 645nm to 670nm, the peak wavelength of deep red light needs to be within the range of 650nm to 675nm, and the full width at half maximum (FWHM) of deep red light needs to be within the range of 18nm to 40nm.

[0030] The dominant wavelength of green light needs to be within the range of 510nm to 540nm, the peak wavelength of green light needs to be within the range of 515nm to 545nm, and the full width at half maximum (FWHM) of green light needs to be within the range of 30nm to 65nm.

[0031] The dominant wavelength of sapphire blue light needs to be within the range of 439nm to 475nm, the peak wavelength of sapphire blue light needs to be within the range of 435nm to 470nm, and the full width at half maximum (FWHM) of sapphire blue light needs to be within the range of 18nm to 40nm.

[0032] The dominant wavelength of white light needs to be within the range of 570nm to 610nm, the peak wavelength of white light needs to be within the range of 600nm to 640nm, and the full width at half maximum (FWHM) of white light needs to be within the range of 150nm to 225nm.

[0033] Research has shown that when the dominant wavelength, peak wavelength, and half-peak width of deep red, green, royal blue, and white light are within a set range, the resulting mixed light can enhance the visual freshness of red and green fresh foods.

[0034] This invention mixes four colors of light—deep red, green, royal blue, and white—and limits the dominant wavelength, peak wavelength, and half-peak width of each color to obtain a mixed light that enhances the visual freshness of red and green fresh foods. This addresses the problem of poor visual freshness enhancement in existing lighting for red and green fresh foods.

[0035] Studies based on the relative spectral power distribution of deep red, green, royal blue, and white light reveal that the proportion of the actual spectral area of ​​each color to the normalized area must meet certain ranges to contribute to enhancing the visual freshness of red-toned foods. Specifically, the proportion of the actual spectral area of ​​deep red light to the normalized area needs to be between 0.6 and 0.8; the proportion of the actual spectral area of ​​green light needs to be between 0.1 and 0.25; the proportion of the actual spectral area of ​​royal blue light needs to be between 0.1 and 0.25; and the proportion of the actual spectral area of ​​white light needs to be between 0.1 and 0.3. The sum of the proportions of the four colors is 1. For clarity, let 'a' represent the proportion of the actual spectral area of ​​deep red light to the normalized area; 'b' represent the proportion of the actual spectral area of ​​green light to the normalized area; 'c' represent the proportion of the actual spectral area of ​​royal blue light to the normalized area; and 'd' represent the proportion of the actual spectral area of ​​white light to the normalized area. Where a+b+c+d=1.

[0036] In some further specific embodiments, regarding the contribution to enhancing the visual freshness of red-toned foods (such as meat), among the various proportions of the actual spectral area of ​​deep red, green, royal blue, and white light to the normalized area, the proportions of deep red, green, royal blue, and white light that contribute significantly to visual freshness are as follows: deep red light accounts for 0.64% of the normalized area, green light accounts for 0.12%, royal blue light accounts for 0.11%, and white light accounts for 0.13%.

[0037] In some further specific embodiments, studies on the proportional relationship between the actual spectral area and the normalized area of ​​various colored lights have found that when the relationship between deep red light, green light, royal blue light, and white light satisfies a certain ratio between their actual spectral areas and the normalized area, the resulting mixed light makes a significant contribution to enhancing the visual freshness of red-colored foods. Specifically, the ratio between the actual spectral area of ​​deep red light and the actual spectral area of ​​green light is preferably greater than 3.

[0038] The ratio between the proportion of the actual spectral area of ​​green light to the proportion of the normalized area of ​​sapphire blue light is preferably in the range of 0.8 to 1.2.

[0039] The ratio between the proportion of the actual spectral area of ​​green light to the proportion of the normalized area of ​​white light is preferably in the range of 0.7 to 1.

[0040] For ease of description and clarity, let 'a' represent the proportion of the actual spectral area of ​​deep red light to the normalized area; 'b' represent the proportion of the actual spectral area of ​​green light to the normalized area; 'c' represent the proportion of the actual spectral area of ​​sapphire blue light to the normalized area; and 'd' represent the proportion of the actual spectral area of ​​white light to the normalized area. The ratio of a to b ranges from greater than 3; the ratio of b to c ranges from 0.8 to 1.2; and the ratio of b to d ranges from 0.7 to 1.

[0041] Studies based on the relative spectral power distribution of deep red, green, royal blue, and white light reveal that, in enhancing the visual freshness of green foods (such as green vegetables), the proportion of the actual spectral area of ​​each color to the normalized area needs to fall within a certain range.

[0042] Specifically, the proportion of the actual spectral area of ​​deep red light to the normalized area must be within the range of 0.5 to 0.7; the proportion of the actual spectral area of ​​green light to the normalized area must be within the range of 0.15 to 0.3; the proportion of the actual spectral area of ​​sapphire blue light to the normalized area must be within the range of 0.15 to 0.3; and the proportion of the actual spectral area of ​​white light to the normalized area must be within the range of 0.08 to 0.2. The sum of the proportions of the four colors is 1. For clarity, let 'a' represent the proportion of the actual spectral area of ​​deep red light to the normalized area; 'b' represent the proportion of the actual spectral area of ​​green light to the normalized area; 'c' represent the proportion of the actual spectral area of ​​sapphire blue light to the normalized area; and 'd' represent the proportion of the actual spectral area of ​​white light to the normalized area. Where a + b + c + d = 1.

[0043] In some further specific embodiments, regarding the contribution to enhancing the visual freshness of green foods, among the various proportions of the actual spectral area of ​​deep red, green, royal blue, and white light to the normalized area, the proportions of deep red, green, royal blue, and white light that contribute significantly to visual freshness are as follows: the proportion of the actual spectral area of ​​deep red light to the normalized area is 0.55, the proportion of the actual spectral area of ​​green light to the normalized area is 0.18, the proportion of the actual spectral area of ​​royal blue light to the normalized area is 0.18, and the proportion of the actual spectral area of ​​white light to the normalized area is 0.09.

[0044] In some further specific embodiments, studies on the proportional relationship between the actual spectral area and the normalized area of ​​various colored lights have found that when the relationship between deep red light, green light, royal blue light, and white light satisfies a certain ratio in the proportion of their actual spectral areas to the normalized area, the resulting mixed light makes a significant contribution to improving the visual freshness of vegetable products. Specifically, the ratio between the proportion of the actual spectral area of ​​deep red light to the proportion of the actual spectral area of ​​green light is preferably greater than 2.5.

[0045] The ratio between the proportion of the actual spectral area of ​​green light to the proportion of the normalized area of ​​sapphire blue light is preferably in the range of 0.8 to 1.2.

[0046] The ratio between the proportion of the actual spectral area of ​​green light to the proportion of the normalized area of ​​white light is preferably in the range of 1.5 to 2.5.

[0047] For ease of description and clarity, let 'a' represent the proportion of the actual spectral area of ​​deep red light to the normalized area; 'b' represent the proportion of the actual spectral area of ​​green light to the normalized area; 'c' represent the proportion of the actual spectral area of ​​sapphire blue light to the normalized area; and 'd' represent the proportion of the actual spectral area of ​​white light to the normalized area. The ratio of a to b is greater than 2.5; the ratio of b to c is between 0.8 and 1.2; and the ratio of b to d is between 1.5 and 2.5.

[0048] The mixed light obtained by mixing deep red, green, royal blue, and white light, through the study of the position of the color coordinates of the mixed light, found that when the position of the color coordinates of the mixed light is restricted to the area below the blackbody radiation curve trajectory in the CIE1931-xy chromaticity diagram, and the distance between the color coordinates and the blackbody radiation curve trajectory is less than or equal to 5 steps, the resulting mixed light makes a significant contribution to enhancing the visual freshness of red-toned foods.

[0049] The mixed light obtained by mixing deep red, green, royal blue, and white light, through the study of the position of the color coordinates of the mixed light, found that when the position of the color coordinates of the mixed light is restricted to the area above the blackbody radiation curve trajectory in the CIE1931-xy chromaticity diagram, and the distance between the color coordinates and the blackbody radiation curve trajectory is less than or equal to 5 steps, the resulting mixed light makes a significant contribution to improving the visual freshness of green foods.

[0050] A study of color-related parameters of mixed light obtained by mixing deep red, green, royal blue, and white light revealed that when the Ra > 70 and Rf > 80, the resulting mixed light significantly contributes to enhancing the visual freshness of meat or green-toned foods. Here, Ra represents the color rendering index, and Rf represents the illumination fidelity.

[0051] A study of the correlated color temperature (CCT) of mixed light obtained by mixing deep red, green, royal blue, and white light revealed that, in enhancing the visual freshness of red-toned foods, when the CCT of the mixed light was limited to 3800K to 4500K, and the color partitions of the mixed light within a 16-hue color wheel were studied, it was found that for the contribution to enhancing the visual freshness of red-toned foods, the h1 color partition needed to be greater than 18%, the h16 color partition greater than 20%, and Rg greater than or equal to 100. The resulting mixed light made a significant contribution to enhancing the visual freshness of meat. The corresponding color zones of the 16-hue color wheel are: h1-red, h2-orange red, h3-orange, h4-orange yellow, h5-yellow, h6-greenish yellow, h7-yellow green, h8-leaf green, h9-green, h10-blue green, h11-blue, h12-ultramarine blue, h13-ultramarine, h14-ultramarine violet, h15-violet, and h16-violet red; Rg represents color saturation.

[0052] A study of the correlated color temperature (CRT) of mixed light obtained by mixing deep red, green, royal blue, and white light revealed that, in enhancing the visual freshness of green foods, when the CRT color temperature was limited to 4800K to 5500K, and the color partitions of the mixed light were studied within a 16-hue color wheel, it was found that for the contribution to enhancing the visual freshness of green foods, the h6 color partition needed to meet a value greater than 12%, the h7 color partition greater than 15%, and Rg greater than or equal to 100. The resulting mixed light made a significant contribution to enhancing the visual freshness of vegetables. The corresponding color zones of the 16-hue color wheel are: h1-red, h2-orange red, h3-orange, h4-orange yellow, h5-yellow, h6-greenish yellow, h7-yellow green, h8-leaf green, h9-green, h10-blue green, h11-blue, h12-ultramarine blue, h13-ultramarine, h14-ultramarine violet, h15-violet, and h16-violet red; Rg represents color saturation.

[0053] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A light emitting device, characterized by, The light emitting device emits mixed light, the mixed light is mixed by four color lights, wherein the four color lights are respectively: deep red light, green light, sapphire blue light and white light; the color temperature of the white light is 4000K; Wherein, the main wavelength range of the deep red light is 645nm to 670nm, the peak wavelength range is 650nm to 675nm, and the half peak width range is 18nm to 40nm; The main wavelength range of the green light is 510nm to 540nm, the peak wavelength range is 515nm to 545nm, and the half peak width range is 30nm to 65nm; The main wavelength range of the sapphire blue light is 439nm to 475nm, the peak wavelength range is 435nm to 470nm, and the half peak width range is 18nm to 40nm; The main wavelength range of the white light is 570nm to 610nm, the peak wavelength range is 600nm to 640nm, and the half peak width range is 150nm to 225nm; Suppose the proportion of the actual spectral area of the deep red light in the normalized area is a, the proportion of the actual spectral area of the green light in the normalized area is b, the proportion of the actual spectral area of the sapphire blue light in the normalized area is c, and the proportion of the actual spectral area of the white light in the normalized area is d; then the value range of a is [0.6, 0.8], the value range of b is [0.1, 0.25], the value range of c is [0.1, 0.25], and the value range of d is [0.1, 0.3], wherein a+b+c+d=1; The correlated color temperature of the mixed light is 3800K to 4500K, wherein in the 16-hue ring, the h1 color partition is greater than 18%, the h16 color partition is greater than 20%, and the color fidelity Rg is greater than or equal to 100; The color coordinates of the mixed light are located in the lower area of the blackbody radiation curve track in the CIE1931-xy color product diagram, that is, Duv<0, and the distance between the color coordinates of the mixed light and the blackbody radiation curve track is less than or equal to 5 steps.

2. A light emitting device, characterized by The light emitting device emits mixed light, the mixed light is mixed by four color lights, wherein the four color lights are respectively: deep red light, green light, sapphire blue light and white light; the color temperature of the white light is 4000K; Wherein, the main wavelength range of the deep red light is 645nm to 670nm, the peak wavelength range is 650nm to 675nm, and the half peak width range is 18nm to 40nm; The main wavelength range of the green light is 510nm to 540nm, the peak wavelength range is 515nm to 545nm, and the half peak width range is 30nm to 65nm; The main wavelength range of the sapphire blue light is 439nm to 475nm, the peak wavelength range is 435nm to 470nm, and the half peak width range is 18nm to 40nm; The main wavelength range of the white light is 570nm to 610nm, the peak wavelength range is 600nm to 640nm, and the half peak width range is 150nm to 225nm; The proportion of the actual spectral area of the deep red light in the normalized area is a, the proportion of the actual spectral area of the green light in the normalized area is b, the proportion of the actual spectral area of the sapphire blue light in the normalized area is c, and the proportion of the actual spectral area of the white light in the normalized area is d; the value range of a is [0.5, 0.7], the value range of b is [0.15, 0.3], the value range of c is [0.15, 0.3], and the value range of d is [0.08, 0.2], wherein a+b+c+d=1; The correlated color temperature of the mixed light ranges from 4800K to 5500K, wherein in the 16-hue circle, the h6 color partition is greater than 12%, the h7 color partition is greater than 15%, and the color fidelity Rg is greater than or equal to 100; The color coordinates of the mixed light are located in the upper area of the blackbody radiation curve track in the CIE1931-xy color diagram, that is, Duv>0, and the distance between the color coordinates of the mixed light and the blackbody radiation curve track is less than or equal to 5 steps.

3. The light emitting device of claim 1, wherein The value of a is 0.64, the value of b is 0.12, the value of c is 0.11, and the value of d is 0.

13.

4. The light emitting device of claim 1, wherein The ratio of a to b ranges from >3, the ratio of b to c ranges from [0.8, 1.2], and the ratio of b to d ranges from [0.7, 1].

5. The light emitting device of claim 1, wherein The Ra of the mixed light is greater than 70, and the Rf is greater than 80.

6. The light emitting device of claim 2, wherein the first and second light emitting devices are arranged in a vertical stack. The value of a is 0.55, the value of b is 0.18, the value of c is 0.18, and the value of d is 0.

09.

7. The light emitting device of claim 2, wherein the first and second light emitting devices are arranged in a vertical stack. The ratio of a to b ranges from >2.5, the ratio of b to c ranges from [0.8, 1.2], and the ratio of b to d ranges from [1.5, 2.5].

8. The light emitting device of claim 2, wherein the first and second light emitting devices are arranged in a vertical stack. The Ra of the mixed light is greater than 70, and the Rf is greater than 80.

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