Daylight rhythm lighting fixture

Abstract

The application discloses a daytime rhythm lighting lamp and relates to the field of lighting lamps. The daytime rhythm lighting lamp comprises at least one blue light LED, wherein a fluorescent glue is encapsulated on the blue light LED, the fluorescent glue comprises encapsulating glue and fluorescent powder, the fluorescent powder comprises Lu3Al5O 12 :Ce 3+ fluorescent powder and CaAlSiN3:Eu 2+ fluorescent powder, and the weight ratio of the two is (30-36):1. According to the application, a light spectrum with a higher rhythm stimulation level can be obtained, the light spectrum has good color rendering performance, and the daytime lighting demand can be met.

Description

Technical Field

[0001] This invention relates to the field of lighting fixtures, and more particularly to a daytime rhythm lighting fixture. Background Technology

[0002] The visual melanin equivalent lux (EML) is an indicator used to quantify the circadian rhythm effect of light. Light exposure directly affects the secretion of melatonin in the human body: strong light reduces melatonin secretion, keeping the brain alert and suitable for work and study. Referring to the Shanghai Municipal Group Standard "Grading and Evaluation of Lighting Quality in Primary and Secondary School Classrooms," AAAAA-level primary and secondary school classroom lighting should meet the following requirements: maintaining a vertical illuminance to the eyes ≥250 lx, and a daytime visual melanin equivalent lux (EML) ≥200.

[0003] Currently, the main method for achieving rhythmic lighting is to modulate the spectrum using LEDs of multiple primary colors. For example, Chinese patent CN114173449A uses white LEDs, blue LEDs, green LEDs, and blue-green LEDs to modulate the daytime rhythmic spectrum. However, this spectral modulation method relies on multiple LEDs of different colors, which is costly and complex to control. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a daytime rhythm lighting fixture that can realize daytime rhythm lighting and has a good lighting effect.

[0005] To solve the technical problem of the present invention, the present invention provides a daytime rhythm lighting fixture, which includes at least one blue LED, wherein the blue LED is encapsulated with a fluorescent adhesive, and the fluorescent adhesive includes an encapsulating adhesive and a phosphor.

[0006] The phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The weight ratio of the two is (30-36):1.

[0007] As an improvement to the above technical solution, the main wavelength of the blue LED is 450-454nm and the half-width is 14-15nm.

[0008] As an improvement to the above technical solution, the chromaticity coordinate x of the blue LED is 0.153 to 0.155, the chromaticity coordinate y is 0.023 to 0.025, and the color purity is 99 to 99.5%.

[0009] As an improvement to the above technical solution, the Lu3Al5O 12 :Ce 3+ The peak wavelength of the phosphor is 500–520 nm, and the average particle size is 15–20 μm.

[0010] As an improvement to the above technical solution, the CaAlSiN3:Eu 2+ The peak wavelength of the phosphor is 620–630 nm, and the average particle size is 13–17 μm.

[0011] As an improvement to the above technical solution, the daytime rhythm lighting fixture emits light of a preset wavelength, the color temperature of which is 4800–5200K. a ≥83.5, R9≥58.7, EML≥200.

[0012] As an improvement to the above technical solution, the main wavelength of the light in the preset band is 450-600nm, the half-width is 21-24nm, the chromaticity coordinate x is 0.33-0.355, and the chromaticity coordinate y is 0.33-0.36.

[0013] As an improvement to the above technical solution, the proportion of red light in the preset wavelength band light is 17.7-23.6%, the proportion of green light is 70-76.9%, and the proportion of blue light is 3.9-8.6%.

[0014] The wavelength of the red light is 625–740 nm, the wavelength of the green light is 500–565 nm, and the wavelength of the blue light is 440–485 nm.

[0015] As an improvement to the above technical solution, the weight ratio of the encapsulating adhesive to the phosphor is (1.3~1.8):1.

[0016] As an improvement to the above technical solution, the encapsulating adhesive is silicone, which includes adhesive A and adhesive B, with a weight ratio of adhesive A to adhesive B of 1:(8-15).

[0017] Implementing this invention has the following beneficial effects:

[0018] This invention uses a blue LED mixed with different phosphors to obtain a spectrum in a preset wavelength band. This spectrum has a high rhythm level and a high color rendering index (R). a With its high color rendering index (R9), the daytime rhythm lighting fixture of this invention can well meet lighting needs. Furthermore, the structure and control method of the fixture are simple. Attached Figure Description

[0019] Figure 1 This is the spectral diagram of the daytime rhythm lighting fixture in Embodiment 1 of the present invention;

[0020] Figure 2 This is the spectral diagram of the daytime rhythm lighting fixture in Embodiment 2 of the present invention;

[0021] Figure 3This is the spectral diagram of the daytime rhythm lighting fixture in Embodiment 3 of the present invention;

[0022] Figure 4 This is the spectral diagram of the daytime rhythm lighting fixture in Embodiment 4 of the present invention;

[0023] Figure 5 This is the spectral diagram of the daytime rhythm lighting fixture in Embodiment 5 of the present invention;

[0024] Figure 6 yes Figure 1 Color illustrations;

[0025] Figure 7 yes Figure 2 Color illustrations;

[0026] Figure 8 yes Figure 3 Color illustrations;

[0027] Figure 9 yes Figure 4 Color illustrations;

[0028] Figure 10 yes Figure 5 Color illustrations. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0030] This invention provides a daytime circadian rhythm lighting fixture, comprising at least one blue LED, the blue LED being encapsulated with phosphor, the phosphor comprising encapsulating adhesive and phosphor; the phosphor comprising Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphors are used in a weight ratio of (30-36):1. Based on the conversion between these two phosphors, the blue light emitted by the blue LED can be converted into light of a preset wavelength, thereby meeting the needs of daytime rhythm stimulation and lighting.

[0031] Specifically, the blue LED is a common type of LED in the art. In one embodiment of the present invention, the dominant wavelength of the blue LED is 450–454 nm, exemplarily 451 nm, 452 nm, 452.5 nm, 453 nm, or 453.5 nm, but not limited thereto. The half-width at half maximum (WWHM) of the blue LED is 14–15 nm, exemplarily 14.2 nm, 14.4 nm, 14.6 nm, or 14.8 nm, but not limited thereto. The chromaticity coordinate x of the blue LED is 0.153–0.155, exemplarily 0.1534, 0.1538, 0.1542, 0.1546, or 0.1548, but not limited thereto. The chromaticity coordinate y of the blue LED is 0.023–0.025, exemplarily 0.0234, 0.0238, 0.0242, 0.0246, or 0.0248, but not limited thereto. The blue LED has a color purity of 99–99.5%, exemplarily 99.1%, 99.2%, 99.3%, or 99.4%, but is not limited thereto. Based on the blue LED described above, the resulting spectrum has a higher level of rhythm and color rendering.

[0032] Specifically, Lu3Al5O 12 :Ce 3+ The peak wavelength of the phosphor is 500–520 nm, with exemplary values ​​of 504 nm, 508 nm, 512 nm, 516 nm, or 518 nm, but not limited to these. Lu3Al5O 12 :Ce 3+ The average particle size of the phosphor is 15–20 μm, with exemplary values ​​of 15.5 μm, 16 μm, 17.5 μm, or 19 μm, but not limited thereto.

[0033] Specifically, CaAlSiN3:Eu 2+ The peak wavelength of the phosphor is 620–630 nm, with exemplary values ​​of 621 nm, 623.5 nm, 625 nm, 627 nm, or 629 nm, but not limited to these. CaAlSiN3:Eu 2+ The average particle size of the phosphor is 13–17 μm, with exemplary values ​​of 13.5 μm, 14 μm, 15 μm, or 16 μm, but not limited thereto.

[0034] Specifically, the encapsulant can be a common LED encapsulant used in the art. For example, in one embodiment of the present invention, the encapsulant is silicone, which includes adhesive A and adhesive B, with a weight ratio of adhesive A to adhesive B of 1:(8-15).

[0035] Specifically, the weight ratio of encapsulating adhesive to phosphor is (1.3 to 1.8):1, with examples being 1.35:1, 1.4:1, 1.5:1 or 1.7:1, but not limited to these.

[0036] Based on the aforementioned daytime rhythm lighting fixtures, light of a preset wavelength can be emitted. The color temperature of this preset wavelength is 4800–5200K, exemplarily 4850K, 4900K, 4950K, 5000K, 5100K, or 5150K, but not limited to these. The color rendering index (R) of this preset wavelength is… a The light in this preset wavelength band has a specific color rendering index (R9) ≥ 83.5, preferably 90–95, with exemplary values ​​of 91, 92, 93, or 94, but is not limited thereto. The light in this preset wavelength band has a specific color rendering index (R9) ≥ 58.7, preferably 65–75, with exemplary values ​​of 66, 67, 68, 69, 70, 72, or 73, but is not limited thereto. The visual melanin equivalent lux (EML) of the spectrum in this preset wavelength band is ≥ 200, preferably 215–240, with exemplary values ​​of 220, 224, 228, 232, 236, or 238, but is not limited thereto. The dominant wavelength of the light in this preset wavelength band is 450–600 nm, with exemplary values ​​of 455 nm, 465 nm, 480 nm, 500 nm, 520 nm, 555 nm, 570 nm, or 590 nm, but is not limited thereto. The half-width of the light in the preset wavelength band is 21–24 nm, exemplarily 21.4 nm, 22 nm, 22.6 nm, 23 nm, or 23.5 nm, but not limited to these. The chromaticity coordinate x of the light in the preset wavelength band is 0.33–0.355, exemplarily 0.333, 0.338, 0.342, 0.346, 0.351, or 0.354, but not limited to these. The chromaticity coordinate y of the light in the preset wavelength band is 0.33–0.36, exemplarily 0.333, 0.337, 0.341, 0.346, 0.353, or 0.358, but not limited to these.

[0037] In the preset wavelength light emitted by the aforementioned daytime rhythm lighting fixtures, the proportion of red light is 17.7% to 23.6%, with examples of 18.2%, 18.8%, 19.3%, 20.1%, 20.9%, 21.5%, 22.3%, or 23.4%, but not limited thereto. In this preset wavelength light, the proportion of green light is 70% to 76.9%, with examples of 70.5%, 71%, 71.5%, 72%, 73%, 74%, or 75%, but not limited thereto. In this preset wavelength light, the proportion of blue light is 3.9% to 8.6%, with examples of 4%, 4.2%, 5%, 5.5%, 6%, 6.7%, or 7%, but not limited thereto. Red light refers to light with a wavelength of 625–740 nm, green light refers to light with a wavelength of 500–565 nm, and blue light refers to light with a wavelength of 440–485 nm.

[0038] It should be noted that blue light mixed with green light produces cyan light, green light mixed with red light produces yellow light, and yellow light mixed with red light produces orange light; the wavelength of cyan light is 485-500nm, the wavelength of yellow light is 565-590nm, and the wavelength of orange light is 590-625nm.

[0039] It should be noted that the dominant wavelength in this invention refers to the wavelength corresponding to the color of the main light emitted by the light source that the eye can perceive. Specifically, in the CIE 1931 horseshoe coordinate system, it is the wavelength corresponding to the intersection of the extended line drawn from point E (0.33, 0.33) to the object being measured and the horseshoe curve. The peak wavelength is the wavelength corresponding to the point where the spectral luminous intensity or radiant power is at its maximum. Half-width refers to the distance between the intersection of a straight line drawn from the midpoint of the peak height parallel to the base of the peak and the two sides of the peak. The width is half-width.

[0040] The present invention will now be described with reference to specific embodiments:

[0041] Example 1

[0042] This embodiment provides a daytime rhythm lighting fixture, which includes a blue LED, and the blue LED is encapsulated with a phosphor. The phosphor includes an encapsulating adhesive and a phosphor; the phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ Phosphor. The blue LED has a dominant wavelength of 454nm, a half-width at half-maximum (WWHM) of 14.6nm, a chromaticity coordinate (x) of 0.1538, a chromaticity coordinate (y) of 0.0246, and a color purity of 99.1%. Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 511 nm and an average particle size of 17.7 μm. (CaAlSiN3:Eu) 2+ The phosphor has a peak wavelength of 628.3 nm and an average particle size of 16.0 μm. (Lu3Al5O) 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor's weight ratio is 31.58:1. The phosphor's weight ratio to the encapsulating adhesive is 1:1.39. The encapsulating adhesive is silicone, specifically consisting of adhesive A and adhesive B, with an adhesive A to adhesive B weight ratio of 1:10.

[0043] In this embodiment, the light emitted by the daytime rhythm lighting fixtures comprises 20.4% red light (625–740 nm), 74.3% green light (500–565 nm), and 5.3% blue light (440–485 nm) (see reference). Figure 1 and Figure 6 ).

[0044] Example 2

[0045] This embodiment provides a daytime rhythm lighting fixture, which includes a blue LED, and the blue LED is encapsulated with a phosphor. The phosphor includes an encapsulating adhesive and a phosphor; the phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ Phosphor. The blue LED has a dominant wavelength of 454nm, a half-width at half-maximum (WWHM) of 14.7nm, a chromaticity coordinate (x) of 0.1536, a chromaticity coordinate (y) of 0.0241, and a color purity of 99.2%. Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 509.3 nm and an average particle size of 18.5 μm. (CaAlSiN3:Eu) 2+ The phosphor has a peak wavelength of 629.2 nm and an average particle size of 14.9 μm. (Lu3Al5O) 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor's weight ratio is 32.24:1. The phosphor's weight ratio to the encapsulating adhesive is 1:1.43. The encapsulating adhesive is silicone, specifically consisting of adhesive A and adhesive B, with an adhesive A to adhesive B weight ratio of 1:10.

[0046] In this embodiment, the light emitted by the daytime rhythm lighting fixtures comprises 19.8% red light (625–740 nm), 74.7% green light (500–565 nm), and 5.5% blue light (440–485 nm) (see reference). Figure 2 and Figure 7 ).

[0047] Example 3

[0048] This embodiment provides a daytime rhythm lighting fixture, which includes a blue LED, and the blue LED is encapsulated with a phosphor. The phosphor includes an encapsulating adhesive and a phosphor; the phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ Phosphor. The blue LED has a dominant wavelength of 453.3nm, a half-width at half-maximum (WWHM) of 14.3nm, a chromaticity coordinate (x) of 0.1544, a chromaticity coordinate (y) of 0.0232, and a color purity of 99.3%. Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 507.6 nm and an average particle size of 16.8 μm. (CaAlSiN3:Eu) 2+ The phosphor has a peak wavelength of 630.0 nm and an average particle size of 14.5 μm. (Lu3Al5O) 12 :Ce3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor's weight ratio is 33.06:1. The phosphor's weight ratio to the encapsulating adhesive is 1:1.56. The encapsulating adhesive is silicone, specifically consisting of adhesive A and adhesive B, with an adhesive A to adhesive B weight ratio of 1:10.

[0049] In this embodiment, the light emitted by the daytime rhythm lighting fixtures comprises 19.9% ​​red light (625–740 nm), 74.5% green light (500–565 nm), and 5.6% blue light (440–485 nm) (see reference). Figure 3 and Figure 8 ).

[0050] Example 4

[0051] This embodiment provides a daytime rhythm lighting fixture, which includes a blue LED, and the blue LED is encapsulated with a phosphor. The phosphor includes an encapsulating adhesive and a phosphor; the phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ Phosphor. The blue LED has a dominant wavelength of 454nm, a half-width at half-maximum (WWHM) of 14.6nm, a chromaticity coordinate (x) of 0.1538, a chromaticity coordinate (y) of 0.0246, and a color purity of 99.1%. Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 510.2 nm and an average particle size of 18.9 μm. (CaAlSiN3:Eu) 2+ The phosphor has a peak wavelength of 627.4 nm and an average particle size of 15.1 μm. (Lu3Al5O) 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor's weight ratio is 33.87:1. The phosphor's weight ratio to the encapsulating adhesive is 1:1.61. The encapsulating adhesive is silicone, specifically consisting of adhesive A and adhesive B, with an adhesive A to adhesive B weight ratio of 1:10.

[0052] In this embodiment, the light emitted by the daytime rhythm lighting fixtures comprises 19.5% red light (625–740 nm), 74.9% green light (500–565 nm), and 5.6% blue light (440–485 nm) (see reference). Figure 4 and Figure 9 ).

[0053] Example 5

[0054] This embodiment provides a daytime rhythm lighting fixture, which includes a blue LED, and the blue LED is encapsulated with a phosphor. The phosphor includes an encapsulating adhesive and a phosphor; the phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ Phosphor. The blue LED has a dominant wavelength of 454nm, a half-width at half-maximum (WWHM) of 14.6nm, a chromaticity coordinate (x) of 0.1538, a chromaticity coordinate (y) of 0.0246, and a color purity of 99.1%. Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 508.1 nm and an average particle size of 15.4 μm. (CaAlSiN3:Eu) 2+ The phosphor has a peak wavelength of 629.7 nm and an average particle size of 13.8 μm. (Lu3Al5O) 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor's weight ratio is 35.22:1. The phosphor's weight ratio to the encapsulating adhesive is 1:1.70. The encapsulating adhesive is silicone, specifically consisting of adhesive A and adhesive B, with an adhesive A to adhesive B weight ratio of 1:10.

[0055] In this embodiment, the light emitted by the daytime rhythm lighting fixtures comprises 19.7% red light (625–740 nm), 74.6% green light (500–565 nm), and 5.7% blue light (440–485 nm) (see reference). Figure 5 and Figure 10 ).

[0056] The daylight rhythm lighting fixtures obtained in Examples 1-5 were lit, and the performance data of their emitted spectra were measured. The specific data are shown in the table below:

[0057]

[0058] The above description is a preferred embodiment of the invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the invention, and these improvements and modifications are also considered to be within the scope of protection of the invention.

Claims

1. A daytime rhythm lighting fixture, characterized in that, It includes at least one blue LED, the blue LED being encapsulated with phosphor, the phosphor comprising encapsulating adhesive and phosphor; The blue LED has a dominant wavelength of 450~454nm, a half-width of 14~15nm, a chromaticity coordinate x of 0.153~0.155, a chromaticity coordinate y of 0.023~0.025, and a color purity of 99~99.5%. The phosphor includes Lu3Al5O 12 :Ce 3+ Phosphor and CaAlSiN3:Eu 2+ The phosphor and the phosphor have a weight ratio of (30~36):1; the Lu3Al5O 12 :Ce 3+ The phosphor has a peak wavelength of 500~520nm and an average particle size of 15~20μm; the CaAlSiN3:Eu 2+ The peak wavelength of the phosphor is 620~630nm, and the average particle size is 13~17μm.

2. The daytime rhythm lighting fixture as described in claim 1, characterized in that, The daytime rhythm lighting fixture emits light in a preset wavelength range, the color temperature of which is 4800~5200K. a ≥83.5, R9≥58.7, EML≥200.

3. The daytime rhythm lighting fixture as described in claim 2, characterized in that, The dominant wavelength of the light in the preset band is 450~600nm, the half-width is 21~24nm, the chromaticity coordinate x is 0.33~0.355, and the chromaticity coordinate y is 0.33~0.

36.

4. The daytime rhythm lighting fixture as described in claim 2, characterized in that, The preset wavelength light contains 17.7-23.6% red light, 70-76.9% green light, and 3.9-8.6% blue light. The wavelength of the red light is 625~740nm, the wavelength of the green light is 500~565nm, and the wavelength of the blue light is 440~485nm.

5. The daytime rhythm lighting fixture as described in claim 1, characterized in that, The weight ratio of the encapsulating adhesive to the phosphor is (1.3~1.8):

1.

6. The daytime rhythm lighting fixture as described in claim 1, characterized in that, The encapsulating adhesive is silicone, which includes adhesive A and adhesive B, with a weight ratio of adhesive A to adhesive B of 1:(8~15).

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