CN110145724A - White light sources, light strips and lamps - Google Patents

Abstract

This application document provides a white light source, a light bar and a lamp. The relative spectral power distribution of the lamp beads shown is Ф(λ). When λ is within the wavelength range of 420nm-660nm, the symmetrical spectral peaks are P1, P2, and P3 respectively, and the corresponding features are: P1 peak wavelength: 600nm-660nm, Half-peak width 90nm-140nm; P2 peak wavelength: 500nm-550nm, half-peak width 60nm-110nm; P3 peak wavelength: 420nm-480nm, half-peak width 30nm-80nm. The lamp bead can emit a spectrum with small fluctuations and excellent continuity, which is closer to sunlight, and can provide users with a good lighting effect, so that they can obtain an appearance similar to that of being outdoors when they are active indoors. The white light source can be installed on the substrate to form a light bar capable of emitting sunlight-like light. Both the white light source and the light bar can be applied to a lamp.

Description

White light sources, light strips and lamps

technical field

The invention relates to the technical field of light emitting devices, in particular to a white light source capable of emitting a spectrum similar to sunlight, and a light bar and a lamp using the LED light bead.

Background technique

With the improvement of people's requirements for light quality, more and more applications will put forward higher requirements for the light color of light-emitting devices. However, there is no uniform evaluation standard for sunlight-like lighting products on the market. In order to make the spectrum of some solar-like products as close as possible to the sunlight spectrum as a whole, they will output high-intensity spectral energy at the wavelength of 440nm-460nm, even exceeding the range of the blue light hazard radiation curve; Wavelengths have distinct absences, making the spectrum discontinuous. These existing products can only have a good fit with sunlight in the wavelength range of 500nm-620nm, so they cannot actually be "sunlight-like" products.

Contents of the invention

The technical solution provides a white light source. The spectrum of the white light source can be separated into at least three symmetrical spectral peaks through decomposition peaks. The spectrum of the white light source is continuous, similar to the solar spectrum, and reduces blue light hazards.

The present invention is achieved through the following technical solutions: a white light source, whose color temperature is selected from 2700K-6500K, whose relative spectral power distribution is Ф(λ), when λ is within the wavelength range of 420nm-660nm, the Ф( λ) is decomposed into at least three symmetrical spectral peaks, the symmetrical spectral peaks are respectively P1, P2, and P3, and the corresponding features are:

P1 peak wavelength range: 600nm-660nm, half maximum width 90nm-140nm;

P2 peak wavelength range: 500nm-550nm, half maximum width 60nm-110nm;

P3 peak wavelength range: 420nm-480nm, half maximum width 30nm-80nm;

The ratio relationship between the peak intensity of P3 and the peak intensity of P1 is 1:(0.5-10), and the ratio relationship between the peak intensity of P3 and the peak intensity of P2 is 1:(0.5-5).

The symmetrical spectral peaks P1, P2, P3 can be further defined as:

P1 peak wavelength range: 610nm-650nm, half-peak width 100nm-130nm;

The P2 peak wavelength range is: 510nm-540nm, the half-peak width is 70nm-100nm;

The peak wavelength range of P3 is: 430nm-470nm, and the half-peak width is 40nm-70nm.

Further, the white light source uses a purple light chip to excite fluorescent powder to emit light, and the fluorescent powder is composed of blue powder (with a main emission peak at 430nm-470nm and a half-peak width of 20nm-60nm), bimodal blue-green powder (one of which has a main emission peak at 430nm-470nm). 460nm, half width 20nm-60nm, another main emission peak at 480nm-580nm, half width 60nm-120nm) and red powder (emission main peak at 600nm-700nm, half width 80nm-120nm). Wherein, the blue powder contains Eu ²⁺ doped chlorophosphate or silicate, specifically Sr ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , Ba ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , BaAl ₁₂ O ₉ :Eu ²⁺ , RbNa ₃ (Li ₃ SiO ₄ ) ₄ :Eu ²⁺ or MgSr ₃ Si ₂ O ₈ :Eu ²⁺ ; the red powder contains nitride, sulfide or fluoride, specifically CaAlSiN ₃ :Eu ²⁺ , (Ca _1-x Sr _x )AlSiN ₃ :Eu ²⁺ or CaS:Eu ²⁺ .

A light bar includes at least one of the above-mentioned white light sources, and a substrate for mounting and fixing the white light sources.

The white light source or light bar provided above can be installed in the shell of the lamp, and connected with other necessary circuit elements to form a lamp.

This technical solution provides a white light source, which can emit a spectrum with small fluctuations and excellent continuity in the wavelength range of 420nm-660nm, which is closer to sunlight, and can provide users with good lighting effects, making it indoors Activities can also get a look and feel similar to being outdoors.

Description of drawings

Fig. 1 is the white light source spectrogram of the 2700K color temperature that embodiment 1 makes;

Fig. 2 is the symmetric spectral peak of Fig. 1;

Fig. 3 is the white light source spectrogram of the 3000K color temperature that embodiment 2 makes;

Fig. 4 is the symmetric spectral peak of Fig. 3;

Fig. 5 is the white light source spectrogram of the 4000K color temperature that embodiment 3 makes;

Fig. 6 is the symmetric spectral peak splitting figure of Fig. 5;

Fig. 7 is the spectrum diagram of the white light source of 5000K color temperature that embodiment 4 makes;

Fig. 8 is the symmetric spectral peak splitting figure of Fig. 7;

Fig. 9 is the spectrum diagram of the white light source with a color temperature of 6500K obtained in Example 5;

FIG. 10 is a peak-splitting diagram of symmetrical spectral peaks in FIG. 9 .

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The reagents or instruments used were not indicated by the manufacturer, and they were all commercially available conventional products.

A white light source with a color temperature of 2700K-6500K, whose relative spectral power distribution is Ф(λ), when λ is within the wavelength range of 420nm-660nm, the Ф(λ) is decomposed into at least three symmetrical spectral peaks, The symmetrical spectral peaks are respectively P1, P2, and P3, and the corresponding features are:

P1 peak wavelength range: 600nm-660nm, half-maximum width 90nm-140nm;

The P2 peak wavelength range is: 500nm-550nm, the half-peak width is 60nm-110nm;

P3 peak wavelength range: 420nm-480nm, half-peak width 30nm-80nm;

Taking Figure 2 in Embodiment 1 as an example, the abscissa of the coordinate system in the figure represents the wavelength, and the vertical coordinate represents the relative intensity. In the present invention, the intensity corresponding to the peak wavelength of P1, P2, and P3 is represented by the relative intensity of the vertical coordinate, that is, the peak intensity, and the peak intensity of P3 is set as the reference intensity 1, and the ratio relationship between the peak intensity of P3 and the peak intensity of P1 is 1:(0.5-10), and the ratio relationship between the P3 peak intensity and the P2 peak intensity is 1:(0.5-5).

The symmetrical spectral peaks P1, P2, P3 can be further defined as:

P1 peak wavelength range: 610nm-650nm, half-peak width 100nm-130nm;

The P2 peak wavelength range is: 510nm-540nm, the half-peak width is 70nm-100nm;

The peak wavelength range of P3 is: 430nm-470nm, and the half-peak width is 40nm-70nm.

In this embodiment, the Gaussian function in the origin software is used to decompose the Ф(λ) into three symmetrical spectral peaks. Specifically, the spectrogram or the data corresponding to the spectrogram of the white light device is imported into the origin software, and the spectrogram or the spectrogram synthesized from the imported data is passed through the Gaussian function in the origin software and combined with each peak wavelength range (610nm- 650nm, 510nm-540nm, 430nm-470nm), taking values in each peak wavelength range for multi-peak fitting can separate P1, P2, P3 three Gaussian peaks (symmetrical spectral peaks), for example, at 610nm-650nm and 430nm Select the maximum peak point within -470nm, and select any point value in 525nm-535nm within the range of 510nm-540nm, and through multi-peak fitting, three Gaussian peaks (symmetrical spectral peaks) that meet the characteristics of P1, P2, and P3 can be obtained ).

Further, the white light source is 380nm-430nm chips to excite phosphors to emit light, and the phosphors are composed of blue powder (emission main peak at 430nm-470nm, half-peak width 20nm-60nm), bimodal blue-green powder (one of which emits main peak At 430nm-460nm, half-peak width 20nm-60nm, another main emission peak at 480nm-580nm, half-peak width 60nm-120nm) and red powder (emission main peak at 600nm-700nm, half-peak width 80nm-120nm). Wherein, the blue powder contains Eu ²⁺ doped chlorophosphate or silicate, specifically Sr ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , Ba ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , BaAl ₁₂ O ₉ :Eu ²⁺ , RbNa ₃ (Li ₃ SiO ₄ ) ₄ :Eu ²⁺ or MgSr ₃ Si ₂ O ₈ :Eu ²⁺ ; the red powder contains nitride, sulfide or fluoride, specifically CaAlSiN ₃ :Eu ²⁺ , (Ca _{1- x} Sr _x )AlSiN ₃ :Eu ²⁺ or CaS:Eu ²⁺ . The bimodal blue-green powder is modulated and provided by the phosphor manufacturer according to the required emission peak range and half-peak width data.

A light bar includes at least one of the above-mentioned white light sources, and a substrate for mounting and fixing the white light sources.

The white light source or light bar provided above can be installed in the shell of the lamp, and connected with other necessary circuit elements to form a lamp.

Embodiment 1-5

The white light source uses a chip with a main emission peak at 380nm-430nm to excite phosphors to emit light. The width is 20nm-60nm, another bimodal blue-green powder with a main emission peak at 480nm-580nm and a half-peak width of 60nm-120nm, and a red powder with a main emission peak at 600nm-700nm and a half-peak width of 80nm-120nm. The specific formulation is as shown in Table 1 Show:

Table 1

Phosphor powder Example 1 Example 2 Example 3 Example 4 Example 5 blue powder 20% 26% 34% 42% 55% Bimodal blue-green powder 75% 70% 63% 55.5% 44.5% pink 5% 4% 3% 2.5% 1.5%

A white light source with a color temperature of 2700K is made with the ratio of Example 1, a white light source with a color temperature of 3000K is made with the ratio of Example 2, a white light source with a color temperature of 4000K is made with the ratio of Example 3, and a white light source with a color temperature of 4000K is made with the ratio of Example 4. A white light source with a color temperature of 5000K was made by mixing, and a white light source with a color temperature of 6500K was made with the mixing ratio of Example 5. Measure respectively the spectrum of each embodiment (seeing Fig. 1, 3, 5, 7, 9) and the symmetrical spectral peak splitting figure (seeing Fig. 2, 4, 6, 8, 10), and the symmetrical spectral peak of each embodiment The peak splitting parameters are as shown in Table 2:

Table 2

The spectrum of the white light source prepared in Example 1 is shown in Fig. 1 , and its spectral power distribution in the wavelength range of 430nm-660nm is relatively connected without obvious loss, so its lighting effect is better. Through the Gaussian function multi-peak fitting function of the origin software, select the maximum peak point in 610nm-650nm and 430nm-470nm respectively, and select any point value in 525nm-535nm in the range of 510nm-540nm, through multi-peak fitting. The spectrum in Figure 1 is decomposed into three symmetrical peaks, and the peak wavelength ranges of these three symmetrical peaks are respectively located within (610nm-650nm), (510nm-540nm) and (430nm-470nm). Specifically, as shown in Figure 2, P1 has a peak wavelength of 637nm and a half-width of 108nm; P2 has a peak wavelength of 535nm and a half-width of 75nm; P3 has a peak wavelength of 450nm and a half-width of 74nm. Based on the peak wavelength of P3, the peak wavelength relationship of each symmetrical peak is 8.6:3.4:1.

The spectrum of the white light source obtained in Example 2 is shown in FIG. 3 , and its spectral power distribution in the wavelength range of 430nm-660nm is relatively consistent without obvious loss, so its lighting effect is better. Decompose the spectrum in Figure 3 into three symmetrical spectral peaks, the results are shown in Figure 4, P1 peak wavelength is 635nm, half-peak width is 112nm; P2 peak wavelength is 525nm, half-peak width is 92nm; P3 peak wavelength is 442nm, half-peak width is 52nm. Based on the peak wavelength of P3, the peak wavelength relationship of each symmetrical spectral peak is 5.3:2.6:1 in turn.

The spectrum of the white light source obtained in Example 3 is shown in FIG. 5 , and its spectral power distribution in the wavelength range of 430nm-660nm is relatively consistent without obvious loss, so its lighting effect is better. Decompose the spectrum in Figure 5 into three symmetrical spectral peaks, and the results are shown in Figure 6, P1 peak wavelength is 630nm, half-peak width is 122nm; P2 peak wavelength is 532nm, half-peak width is 77nm; P3 peak wavelength is 453nm, half-peak width is 61nm. Based on the P3 peak wavelength, the peak wavelength relationship of each symmetrical spectral peak is 2.0:1.2:1 in turn.

The spectrum of the white light source prepared in Example 4 is shown in FIG. 7 , and its spectral power distribution in the wavelength range of 430nm-650nm is relatively consistent without obvious loss, so its lighting effect is better. Decompose the spectrum in Figure 7 into three symmetrical spectral peaks, and the results are shown in Figure 8, P1 peak wavelength is 629nm, half-peak width is 118nm; P2 peak wavelength is 521nm, half-peak width is 94nm; P3 peak wavelength is 458nm, half-peak width is 74nm. Based on the P3 peak wavelength, the peak wavelength relationship of each symmetrical spectral peak is 1.3:1.1:1 in turn.

The spectrum of the white light source prepared in Example 5 is shown in Figure 9. Although there is an obvious trough in the wavelength range of 475nm-520nm, this is because the color temperature of the white light source is 6500K, and the overall bias is towards cool colors. However, the spectral power distribution in the wavelength range of 520nm-660nm is relatively consistent, and there is no obvious loss, so its lighting effect is better. Decompose the spectrum in Figure 9 into three symmetrical spectral peaks, the results are shown in Figure 10, P1 peak wavelength 618nm, half width 135nm; P2 peak wavelength 516nm, half width 103nm; P3 peak wavelength 449nm, half width 40nm. Based on the peak wavelength of P3, the peak wavelength relationship of each symmetrical spectral peak is 0.8:0.9:1 in turn.

Claims (8)

1. A white light source, characterized in that the relative spectral power distribution of the white light source is Ф (λ), and when λ is within the wavelength range of 420nm-660nm, the Ф (λ) is at least decomposed into three symmetrical spectra peaks, the symmetrical spectral peaks are P1, P2, P3 respectively, and the corresponding features are: P1 peak wavelength range: 600nm-660nm, half maximum width 90nm-140nm; P2 peak wavelength range: 500nm-550nm, half maximum width 60nm-110nm; P3 peak wavelength range: 420nm-480nm, half maximum width 30nm-80nm; The ratio relationship between the peak intensity of P3 and the peak intensity of P1 is 1: (0.5-10), the ratio relationship between the peak intensity of P3 and the peak intensity of P2 is 1: (0.5-5); the white light source The color temperature is selected from 2700K-6500K. 2. The white light source according to claim 1, wherein the symmetrical spectral peaks are respectively P1, P2, and P3, and the corresponding features are: P1 peak wavelength range: 610nm-650nm, half maximum width 100nm-130nm; P2 peak wavelength range: 510nm-540nm, half maximum width 70nm-100nm; P3 peak wavelength range: 430nm-470nm, half maximum width 40nm-70nm. 3. The white light source according to claim 1 or 2, characterized in that, the white light source excites phosphors with emission main peaks at 380nm-430nm to emit light, and the phosphors emit light at 430nm-470nm, half peak Blue powder with a width of 20nm-60nm, and a bimodal blue-green powder with a main emission peak at 430nm-460nm, a half-peak width of 20nm-60nm, another main emission peak at 480nm-580nm, and a half-peak width of 60nm-120nm, and the main emission peak Composition of red powder at 600nm-700nm, half maximum width 80nm-120nm. 4. The white light source according to claim 3, characterized in that, the blue powder contains Eu ²⁺ doped chlorophosphate or silicate; the bimodal blue-green powder contains rare earth aluminophosphate or rare earth Phosphosilicate; the red powder is nitride, sulfide or fluoride. 5. The white light source according to claim 4, characterized in that the blue powder is Sr ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , Ba ₅ (PO ₄ ) ₃ Cl:Eu ²⁺ , BaAl ₁₂ O ₉ :Eu ²⁺ , RbNa ₃ (Li ₃ SiO ₄ ) ₄ :Eu ²⁺ or MgSr ₃ Si ₂ O ₈ :Eu ²⁺ . 6. The white light source according to claim 4, characterized in that the red powder is CaAlSiN ₃ :Eu ²⁺ , (Ca _1-x Sr _x )AlSiN ₃ :Eu ²⁺ or CaS:Eu ²⁺ . 7. A light bar, comprising a substrate, characterized in that at least one white light source according to claim 1 is disposed on the substrate. 8. A lamp, comprising a housing, characterized in that: the white light source as claimed in claim 1 or the light bar as claimed in claim 7 is installed in the housing.