Multi-lamp-bead synthetic light-emitting lamp according to spectrum and light-emitting method according to spectrum

Abstract

The invention provides a multi-lamp-bead synthesis type spectrum-based light emitting lamp and a spectrum-based light emitting method. The lamp beads with the emission peak value difference larger than or equal to 5 nm in the wave band range of 300 nm to 500 nm are different kinds of lamp beads. According to the multi-lamp-bead synthesis type spectrum-based light emitting lamp and the multi-lamp-bead synthesis type spectrum-based light emitting lamp, at least two kinds of lamp beads are adopted for emitting light at the same time to jointly form a light emitting spectrum similar to the sunlight spectrum, each kind of lamp bead is provided with at most three light emitting chips, it is guaranteed that the spectrum is stable, and the Vf value can be prevented from being too high.

Description

Technical Field

[0001] The present invention relates to the field of lighting, and particularly to a multi-light-emitting-diode synthetic spectrum-emitting lamp and a spectrum-emitting method. Background Art

[0002] With the continuous development of LED lighting technology, while meeting traditional lighting needs, people have put forward higher requirements for the quality and comfort of lighting light. Especially in recent years, as people have realized that light is closely related to eye health and biological rhythms, the requirements for healthy lighting have also been continuously increasing. Therefore, R & D personnel have been constantly pursuing a lamp luminous effect that can rival sunlight. However, in fact, it is not easy to achieve good sunlight-spectrum lighting.

[0003] Specifically, in order to form the distribution effect of wave peaks and wave valleys similar to the sunlight spectrum, the existing and relatively common technology is to use multi-quantum-well chips to achieve. Refer to Figure 1A and Figure 1B as shown. Corresponding to Figure 1A is the luminous spectrum of an existing three-quantum-well chip under a drive current of 30 mA, Figure 1B and Figure 1A is the luminous spectrum of the existing three-quantum-well chip under a drive current of 150 mA. It can be seen from the reference figure that the luminous spectrum corresponding to the three-quantum-well chip has at least three wave peaks, so as to achieve a luminous spectrum close to the sunlight spectrum. However, in actual applications, the competition of carriers between multi-quantum wells will intensify. Comparing Figure 1B it can be known that under different drive currents, the peak values of multiple wavelengths change greatly. The spectral peak values in the longer wavelength band will decrease while the spectral peak values in the shorter wavelength band will relatively increase, resulting in a large deviation between the actual luminous spectrum of the three-quantum-well chip and the sunlight spectrum, and thus unable to produce a lighting effect comparable to sunlight, and the evaluation index of light quality also drops significantly. And even if up to 4 or even 5 quantum wells are set, there will still be problems such as some interval wavelengths being too long or some wavelengths being missing, and the final spectral continuity is poor. At the same time, the production yield of multi-quantum-well chips is low and the cost is high.

[0004] Therefore, R & D personnel have also proposed another technical solution, which is to simulate sunlight through multiple blue-light chips with different peak wavelengths, and obtain a luminous spectrum of an approximate sunlight spectrum in the visible light band by exciting yellow-green phosphor and red phosphor. Specifically, for example, the spectrum-emitting method and spectrum-emitting lamp disclosed in Chinese Patent Publication No. CN118129090A obtain a luminous spectrum comparable to the sunlight spectrum through reasonable matching of the wavelengths and half-wave widths of each light source. Specifically refer to Figure 2A and Figure 2B as shown. Corresponding to Figure 2A is the luminous spectrum of three blue-light chips with different peak wavelengths under a drive current of 30 mA,Figure 2B Shown in FIG. 1 is the emission spectrum of a blue light chip with three different peak wavelengths under a drive current of 150 mA. For this technical solution, the peak wavelength variation is relatively stable under different drive currents. However, when a single-peak blue light chip is encapsulated with wavelength conversion materials, it is impossible to achieve an emission spectrum close to that of sunlight. Only by using more than three blue light chips with different peak wavelengths plus wavelength conversion materials can an emission spectrum close to that of sunlight be achieved. When multiple chips are connected in parallel, the Vf (forward voltage) value of the corresponding lamp beads can be ensured to be the same as that of a single-chip lamp bead. However, due to the different V-I volt-ampere characteristic curves of chips with different peak wavelengths, under parallel connection, when the drive current is different, the current distributed to each chip will be significantly unbalanced, resulting in spectral changes. Therefore, only by connecting multiple chips in series can the spectral stability be ensured under different current conditions. However, the Vf (forward voltage) value of the lamp beads formed by encapsulating multiple chips in series will be a multiple of the number of chips of a single chip. For example, the Vf value of a lamp bead formed by encapsulating three blue light chips with different peak wavelengths in series is approximately 9 V, which is difficult to match with existing mainstream drivers, leading to an increase in cost and matching difficulty. Summary of the Invention

[0005] An object of the present invention is to provide a multi-lamp bead synthetic spectrum-emitting lamp and a spectrum-emitting method, wherein the multi-lamp bead synthetic spectrum-emitting lamp and the multi-lamp bead synthetic spectrum-emitting method can form an emission spectrum approximate to that of sunlight, and avoid using multi-quantum well chips to ensure a stable emission spectrum when the drive current changes, and avoid obvious deviation between the emission spectrum and the sunlight spectrum due to the change of the drive current.

[0006] Another object of the present invention is to provide a multi-lamp bead synthetic spectrum-emitting lamp and a spectrum-emitting method, wherein when the multi-lamp bead synthetic spectrum-emitting lamp and the multi-lamp bead synthetic spectrum-emitting method use multiple chips to achieve an emission spectrum approximate to that of sunlight, they can also avoid too high Vf value, which is beneficial to matching the drive circuit and realizing illumination comparable to sunlight.

[0007] Another object of the present invention is to provide a multi-lamp bead synthetic spectrum-emitting lamp and a spectrum-emitting method, wherein the multi-lamp bead synthetic spectrum-emitting lamp and the multi-lamp bead synthetic spectrum-emitting method use at least two lamp beads with different emission peak wavelengths for synthetic emission to form an emission spectrum approximate to that of sunlight, and the number of chips in a single lamp bead is reduced, which can avoid too high Vf value.

[0008] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. Lamp beads with an emission peak difference of ≥5 nm within the wavelength range of 300 nm - 500 nm are defined as different types of lamp beads. The multi - bead synthetic spectrum - emitting lamp includes at least two types of lamp beads, where each lamp bead has at most three light - emitting chips, and the light - emitting chips in the same lamp bead can form at least two different emission peaks. Each of the lamp beads emits light simultaneously, jointly forming an emission spectrum similar to the sunlight spectrum.

[0009] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. The lamp beads of the multi - bead synthetic spectrum - emitting lamp are selected to meet the following condition: among the emission peaks jointly formed by all the lamp beads emitting light simultaneously, the peak interval between two adjacent peaks is greater than or equal to 5 nm and less than or equal to 20 nm, so as to ensure the continuity of the spectrum.

[0010] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. At most three light - emitting chips are connected in series in each of the lamp beads to avoid too high Vf value, which is beneficial to matching the driving circuit.

[0011] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. Each type of lamp bead has a different emission peak wavelength, and the light - emitting chips in each lamp bead can form different emission peaks, so as to meet the peak settings of the corresponding spectrum. The emission spectrum similar to the sunlight spectrum is formed by the joint emission of each lamp bead.

[0012] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. The multi - bead synthetic spectrum - emitting lamp includes four light - emitting chips with emission peak wavelengths of 433 nm, 445 nm, 457 nm, and 470 nm within an error range of ±2.5 nm. The four light - emitting chips are divided into two types of lamp beads in pairs. Each of the two types of lamp beads has two light - emitting chips with different emission peak wavelengths. The corresponding emission spectra of the two lamp beads are different. Each of the lamp beads emits light simultaneously, synthesizing an emission spectrum similar to the sunlight spectrum.

[0013] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method. The two light - emitting chips with emission peak wavelengths of 433 nm and 457 nm belong to the same lamp bead, and the two light - emitting chips with emission peak wavelengths of 445 nm and 470 nm belong to the same lamp bead, which is beneficial to the excitation of the corresponding wavelength - conversion materials by each lamp bead.

[0014] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the light - emitting chip selects a double - quantum - well chip with two peak wavelengths in the corresponding emission spectrum, and each of the two types of beads has at most two of the double - quantum - well chips, so as to reduce the number of chips in each bead while meeting the corresponding spectral peak settings, which is beneficial to reducing the Vf value and can be generally matched with the driving circuit.

[0015] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the peak - wavelength interval between the two peaks of the double - quantum - well chip is less than or equal to 20 nm, so as to ensure the stability of the emission spectrum under different driving currents and ensure the corresponding lighting effect.

[0016] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the peak - wavelength interval between the two peaks of the double - quantum - well chip is greater than or equal to 8 nm, so as to be beneficial to ensuring the spectral continuity of each bead and effectively reducing the gaps and spikes in the spectrum.

[0017] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the two peak wavelengths of the double - quantum - well chip are defined as the first peak wavelength and the second peak wavelength. The emission peak wavelength of the first peak wavelength of the double - quantum - well chip of one type of bead is 435 nm within an error range of ±2.5 nm, and the emission peak wavelength of the second peak wavelength is 445 nm within an error range of ±2.5 nm. The emission peak wavelength of the first peak wavelength of the double - quantum - well chip of the other type of bead is 457 nm within an error range of ±2.5 nm, and the emission peak wavelength of the second peak wavelength is 470 nm within an error range of ±2.5 nm, effectively ensuring the continuity and stability of the synthesized emission spectrum when the two beads emit light simultaneously.

[0018] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the multi - bead synthetic spectrum - emitting lamp further includes another bead with an emission peak wavelength different from the above - mentioned two types of beads in the wavelength band range of 300 nm - 500 nm of the peak wavelength, so as to further obtain an emission spectrum approaching the sunlight spectrum based on the simultaneous emission of multiple beads.

[0019] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein the other type of bead also selects a double - quantum - well chip. The double - quantum - well chips of the three types of beads are respectively a double - quantum - well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 405 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 420 nm, a double - quantum - well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 442 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 455 nm, and a double - quantum - well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 468 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 480 nm, so as to synthesize a luminous spectrum closer to the sunlight spectrum.

[0020] Another object of the present invention is to provide a multi - bead synthetic spectrum - emitting lamp and a spectrum - emitting method, wherein wavelength - conversion materials are respectively used to perform wavelength - conversion matching on each of the beads to further obtain a luminous spectrum approximating the sunlight spectrum.

[0021] According to one aspect of the present invention, the present invention provides a multi - bead synthetic spectrum - emitting lamp. Beads with an emission peak difference of ≥5 nm in the wavelength range of 300 nm - 500 nm are defined as different types of beads. The multi - bead synthetic spectrum - emitting lamp includes at least two types of beads, wherein each bead has at most three light - emitting chips, and the light - emitting chips in the same bead can form at least two different emission peaks. The peak interval between two adjacent wave peaks among the emission peaks jointly formed by each bead is greater than or equal to 5 nm and less than or equal to 20 nm. Different types of beads are connected in series, and the corresponding luminous spectrum synthesized by the simultaneous emission of each bead is the luminous spectrum of the multi - bead synthetic spectrum - emitting lamp.

[0022] In an embodiment, the bead selects a double - quantum - well chip with a two - peak - wave corresponding luminous spectrum. Each bead has at most two of the double - quantum - well chips respectively, and the peak interval between the two wave peaks of each double - quantum - well chip is greater than or equal to 8 nm and less than or equal to 20 nm.

[0023] In one embodiment, the two-peak waves defining the double quantum well chip are a first peak wave and a second peak wave. The emission peak wavelength of the first peak wave of the double quantum well chip of one of the lamp beads is 435 nm within an error range of ±2.5 nm, and the emission peak wavelength of the second peak wave is 445 nm within an error range of ±2.5 nm. The emission peak wavelength of the first peak wave of the double quantum well chip of the other lamp bead is 457 nm within an error range of ±2.5 nm, and the emission peak wavelength of the second peak wave is 470 nm within an error range of ±2.5 nm.

[0024] In one embodiment, the multi-lamp bead synthetic spectrum-emitting lamp fixture further includes another lamp bead with an emission peak wavelength different from those of the above two lamp beads in the wavelength band range of 300 nm - 500 nm. This other lamp bead also uses a double quantum well chip, and there is exactly one double quantum well chip. The double quantum well chips of the three lamp beads are respectively a double quantum well chip with an emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 405 nm and an emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 420 nm, a double quantum well chip with an emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 442 nm and an emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 455 nm, and a double quantum well chip with an emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 468 nm and an emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 480 nm.

[0025] In one embodiment, the multi-lamp bead synthetic spectrum-emitting lamp fixture further includes a single-peak lamp bead with an emission peak wavelength different from those of the above three lamp beads in the wavelength band range of 300 nm - 500 nm. The single-peak lamp bead has exactly one light-emitting chip with an emission peak wavelength within an error range of ±2.5 nm being 380 nm.

[0026] In one embodiment, wavelength conversion matching is performed on each of the lamp beads with wavelength conversion materials having emission peak wavelengths at 494 nm ± 5 nm, 535 nm ± 5 nm, 495 nm ± 5 nm, 655 nm ± 5 nm, 733 nm ± 5 nm, 795 nm ± 5 nm, 821 nm ± 5 nm, 605 nm ± 5 nm, and 525 nm ± 5 nm respectively.

[0027] In one embodiment, the wavelength conversion material is a phosphor, and the phosphor is dispersed in transparent silica gel or silicone resin. The proportion of phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% is A:B:494nm:535nm:495nm:655nm:733nm:795nm:821nm:605nm:525nm = 0.29:2.9:0.11:0.504:0.03:0.1155:0.7:0.3:0.3:0.0665:0.136, where A and B are two-component silica gel or silicone resin.

[0028] In one embodiment, the multi-LED synthetic spectrum-emitting lamp includes four light-emitting chips with emission peak wavelengths within an error range of ±2.5 nm being 433 nm, 445 nm, 457 nm, and 470 nm. The four light-emitting chips are divided into two groups belonging to two types of LED beads respectively. For the two types of LED beads, each has two light-emitting chips with different emission peak wavelengths. The two light-emitting chips of the same LED bead are connected in series.

[0029] In one embodiment, the two light-emitting chips with emission peak wavelengths of 433 nm and 457 nm belong to the same LED bead, and the two light-emitting chips with emission peak wavelengths of 445 nm and 470 nm belong to the same LED bead.

[0030] In one embodiment, wavelength conversion materials with emission peak wavelengths respectively in the ranges of 494 nm ± 5 nm, 495 nm ± 5 nm, 535 nm ± 5 nm, and 655 nm ± 5 nm are used to perform wavelength conversion matching for each LED bead.

[0031] In one embodiment, the wavelength conversion material is a phosphor, and the phosphor is dispersed in transparent silica gel or silicone resin. The proportion of phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% is A:B:494nm:495nm:535nm:655nm = 0.85:8.5:0.14:0.48:5.13:0.77, where A and B are two-component silica gel or silicone resin.

[0032] In one embodiment, wavelength conversion materials with emission peak wavelengths respectively in the ranges of 494 nm ± 5 nm, 495 nm ± 5 nm, 535 nm ± 5 nm, 525 nm ± 5 nm, and 655 nm ± 5 nm are used to perform wavelength conversion matching for each LED bead.

[0033] In one embodiment, the wavelength conversion material is a phosphor, and the phosphor is dispersed in transparent silica gel or silicone resin. The proportion of phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% is A:B:494nm:495nm:535nm:525nm:655nm = 0.82:8.2:0.16:0.03:3.06:0.429:0.48, where A and B are two-component silica gel or silicone resin.

[0034] According to another aspect of the present invention, the present invention also provides a multi-LED synthetic spectrum emission method. It is defined that LEDs with an emission peak difference of ≥5nm in the wavelength range of 300nm - 500nm are different types of LEDs. The multi-LED synthetic spectrum emission method includes the steps:

[0035] A. Select at least two LEDs, where each LED has at most three light-emitting chips, and the light-emitting chips in the same LED can form at least two different emission peaks;

[0036] B. Light up each LED together, where the peak interval between two adjacent peaks among the emission peaks formed by each LED together is greater than or equal to 5nm and less than or equal to 20nm.

[0037] In one embodiment, in step A, the light-emitting chips in each selected LED are double quantum well chips with two peak waves in the corresponding emission spectrum. Each LED has at most two such double quantum well chips, and the peak interval between the two peak waves of each double quantum well chip is greater than or equal to 8nm and less than or equal to 20nm.

[0038] In one embodiment, it is defined that the two peak waves of the double quantum well chip are the first peak wave and the second peak wave. The emission peak wavelength of the first peak wave of the double quantum well chip of one type of LED is 435nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 445nm within an error range of ±2.5nm. The emission peak wavelength of the first peak wave of the double quantum well chip of another type of LED is 457nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 470nm within an error range of ±2.5nm.

[0039] In one embodiment, step A further includes step a1: Select another light-emitting diode with an emission peak wavelength different from those of the above two light-emitting diodes within the wavelength band range of 300 nm to 500 nm. This another light-emitting diode also uses a double quantum well chip, and there is only one such double quantum well chip. The double quantum well chips of the three light-emitting diodes are respectively a double quantum well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 405 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 420 nm; a double quantum well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 442 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 455 nm; and a double quantum well chip with the emission peak wavelength of the first peak wave within an error range of ±2.5 nm being 468 nm and the emission peak wavelength of the second peak wave within an error range of ±2.5 nm being 480 nm.

[0040] In one embodiment, step A further includes step a2: Select a single-peak light-emitting diode with an emission peak wavelength different from those of the above three light-emitting diodes within the wavelength band range of 300 nm to 500 nm. The single-peak light-emitting diode has only one light-emitting chip with an emission peak wavelength within an error range of ±2.5 nm being 380 nm.

[0041] In one embodiment, before step B, the multi-light-emitting diode synthetic spectral emission method further includes a step C: Use wavelength conversion materials with emission peak wavelengths respectively at 494 nm ± 5 nm, 535 nm ± 5 nm, 495 nm ± 5 nm, 655 nm ± 5 nm, 733 nm ± 5 nm, 795 nm ± 5 nm, 821 nm ± 5 nm, 605 nm ± 5 nm, and 525 nm ± 5 nm to perform wavelength conversion matching on each light-emitting diode.

[0042] In one embodiment, the wavelength conversion materials selected in step C are phosphors. The phosphors are dispersed in transparent silica gel or silicone resin. The proportion of the phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% is A:B:494 nm:535 nm:495 nm:655 nm:733 nm:795 nm:821 nm:605 nm:525 nm = 0.29:2.9:0.11:0.504:0.03:0.1155:0.7:0.3:0.3:0.0665:0.136, where A and B are two-component silica gel or silicone resin.

[0043] In one embodiment, the lamp beads selected in step A are lamp beads each including two of the light-emitting chips. Among the lamp beads selected in step A, there are four light-emitting chips with emission peak wavelengths within an error range of ±2.5 nm being 433 nm, 445 nm, 457 nm, and 470 nm. The four light-emitting chips are divided into two groups belonging to two of the lamp beads respectively, and for the two lamp beads, each has two light-emitting chips with different emission peak wavelengths. The two light-emitting chips of the same lamp bead are connected in series.

[0044] In one embodiment, among the lamp beads selected in step A, one type of lamp bead includes two of the light-emitting chips with emission peak wavelengths of 433 nm and 457 nm, and another type of lamp bead includes two of the light-emitting chips with emission peak wavelengths of 445 nm and 470 nm.

[0045] In one embodiment, before step B, the multi-lamp-bead synthetic spectral emission method further includes a step C: wavelength conversion matching is performed on each of the lamp beads with wavelength conversion materials having emission peak wavelengths respectively at 494 nm ± 5 nm, 495 nm ± 5 nm, 535 nm ± 5 nm, and 655 nm ± 5 nm.

[0046] In one embodiment, the wavelength conversion materials selected in step C are phosphors, and the phosphors are dispersed in transparent silica gel or silicone resin. The proportions of the phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% are A:B:494 nm:495 nm:535 nm:655 nm = 0.85:8.5:0.14:0.48:5.13:0.77, where A and B are two-component silica gel or silicone resin.

[0047] In one embodiment, before step B, the multi-lamp-bead synthetic spectral emission method further includes a step C: wavelength conversion matching is performed on each of the lamp beads with wavelength conversion materials having emission peak wavelengths respectively at 494 nm ± 5 nm, 495 nm ± 5 nm, 535 nm ± 5 nm, 525 nm ± 5 nm, and 655 nm ± 5 nm.

[0048] In one embodiment, the wavelength conversion materials selected in step C are phosphors, and the phosphors are dispersed in transparent silica gel or silicone resin. The proportions of the phosphors with corresponding emission peak wavelengths in the transparent silica gel or silicone resin within an error range of ±15% are A:B:494 nm:495 nm:535 nm:525 nm:655 nm = 0.82:8.2:0.16:0.03:3.06:0.429:0.48, where A and B are two-component silica gel or silicone resin.

[0049] The further objects and advantages of the present invention will be fully realized through the understanding of the following description and the accompanying drawings. Description of the Drawings

[0050] Figure 1A It is the emission spectrum of an existing three - quantum - well chip driven at 30 mA.

[0051] Figure 1B It is the emission spectrum of an existing three - quantum - well chip driven at 150 mA.

[0052] Figure 2A It is the emission spectrum of a blue - light chip based on three different peak wavelengths driven at 30 mA.

[0053] Figure 2B It is the emission spectrum of a blue - light chip based on three different peak wavelengths driven at 150 mA.

[0054] Figures 3A to 3C It is a schematic diagram of the corresponding emission spectrum and color rendering index of a lamp bead of a multi - lamp - bead synthetic spectrum - emitting lamp according to a first embodiment of the present invention.

[0055] Figures 4A to 4C It is a schematic diagram of the corresponding emission spectrum and color rendering index of another lamp bead of the multi - lamp - bead synthetic spectrum - emitting lamp according to the above - mentioned first embodiment of the present invention.

[0056] Figures 5A to 5C It is a schematic diagram for comparing the emission spectrum of the multi - lamp - bead synthetic spectrum - emitting lamp according to the above - mentioned first embodiment of the present invention with the sunlight spectrum and its color rendering index schematic diagram.

[0057] Figures 6A to 6C It is a schematic diagram of the corresponding emission spectrum and color rendering index of a lamp bead of a multi - lamp - bead synthetic spectrum - emitting lamp according to a second embodiment of the present invention.

[0058] Figures 7A to 7C It is a schematic diagram of the corresponding emission spectrum and color rendering index of another lamp bead of the multi - lamp - bead synthetic spectrum - emitting lamp according to the above - mentioned second embodiment of the present invention.

[0059] Figures 8A to 8C It is a schematic diagram for comparing the emission spectrum of the multi - lamp - bead synthetic spectrum - emitting lamp according to the above - mentioned second embodiment of the present invention with the sunlight spectrum and its color rendering index schematic diagram.

[0060] Figures 9A to 9C It is a schematic diagram of the corresponding emission spectrum and color rendering index of a lamp bead of a multi - lamp - bead synthetic spectrum - emitting lamp according to a third embodiment of the present invention.

[0061] Figures 10A to 10CSchematic diagram of the corresponding emission spectrum and color rendering index of another lamp bead of the multi-lamp-bead synthesized spectrum-emitting lamp according to the third embodiment of the present invention.

[0062] Figures 11A to 11C Schematic diagram for comparing the emission spectrum of the multi-lamp-bead synthesized spectrum-emitting lamp according to the third embodiment of the present invention with the sunlight spectrum and its color rendering index schematic diagram.

[0063] Figure 12A Schematic diagram of the corresponding emission spectrum of a lamp bead of a multi-lamp-bead synthesized spectrum-emitting lamp according to a fourth embodiment of the present invention.

[0064] Figure 12B Schematic diagram of the corresponding emission spectrum of another lamp bead of the multi-lamp-bead synthesized spectrum-emitting lamp according to the fourth embodiment of the present invention.

[0065] Figure 12C Schematic diagram of the corresponding emission spectrum of yet another lamp bead of the multi-lamp-bead synthesized spectrum-emitting lamp according to the fourth embodiment of the present invention.

[0066] Figure 12D Schematic diagram for comparing the emission spectrum of the multi-lamp-bead synthesized spectrum-emitting lamp according to the fourth embodiment of the present invention with the sunlight spectrum.

[0067] Figure 12E Schematic diagram of the corresponding emission spectrum of a single-peak lamp bead of a variant embodiment of the multi-lamp-bead synthesized spectrum-emitting lamp according to the fourth embodiment of the present invention.

[0068] Figure 12F Schematic diagram for comparing the emission spectrum of the variant embodiment of the multi-lamp-bead synthesized spectrum-emitting lamp according to the fourth embodiment of the present invention with the sunlight spectrum. Detailed implementation manners

[0069] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes without departing from the spirit and scope of the present invention.

[0070] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present invention.

[0071] It can be understood that the term "one" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of one element can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0072] The present invention provides a multi - bead synthetic spectrum - emitting lamp, wherein the multi - bead synthetic spectrum - emitting lamp synthesizes the corresponding emission spectrum in a manner that multiple beads emit light simultaneously, and avoids using multi - quantum well chips to ensure a stable emission spectrum when the driving current changes, avoids obvious deviation between the emission spectrum and the sunlight spectrum due to the change of the driving current, and also avoids excessive chips being encapsulated in a single bead to avoid too high Vf value, which is beneficial to matching the driving circuit and achieving illumination comparable to sunlight.

[0073] Specifically, beads with an emission peak difference of ≥5nm in the wavelength range of 300nm - 500nm are defined as different types of beads. The multi - bead synthetic spectrum - emitting lamp uses at least two types of beads for synthetic light emission, and at least two of the beads can form at least two different emission peaks to form an emission spectrum approximate to the sunlight spectrum. Based on the idea of multi - bead synthetic light emission, each emission peak of the target emission spectrum is formed by at least two different types of the beads, so that the number of chips in a single bead is reduced compared to the number of chips in the existing beads that form the entire emission spectrum with a single bead, thus reducing the Vf value compared to the existing beads and being beneficial to matching the corresponding drive.

[0074] Preferably, in the present invention, each of the beads has at most three chips. That is to say, the beads of the present invention do not include the case where the number of encapsulated chips is greater than or equal to 4. Reducing the number of chips in a single bead can avoid too high Vf value, and the Vf value can be controlled at 9V or below, which is beneficial to matching the corresponding drive.

[0075] Specifically, the multi-LED synthetic spectrum-emitting lamp includes at least two types of LEDs. Each type of LED has at most three light-emitting chips, and the light-emitting chips in the same LED can form at least two different emission peaks. Each of the LEDs emits light simultaneously to jointly form a light-emitting spectrum similar to the sunlight spectrum.

[0076] It is worth mentioning that the selection of the LEDs in the multi-LED synthetic spectrum-emitting lamp satisfies that among the emission peaks jointly formed by all the LEDs emitting light simultaneously, the peak interval between two adjacent wave peaks is greater than or equal to 5 nm and less than or equal to 20 nm, that is, the peak interval between two adjacent wave peaks among the emission peaks jointly formed by each of the LEDs is greater than or equal to 5 nm and less than or equal to 20 nm, so as to ensure the continuity of the spectrum.

[0077] It can be understood that each of the LEDs emits light jointly to form the light-emitting spectrum of the multi-LED synthetic spectrum-emitting lamp. In different modes of the multi-LED synthetic spectrum-emitting lamp, it is also necessary for each of the LEDs to emit light jointly to generate a light-emitting spectrum approaching the sunlight spectrum.

[0078] It is worth mentioning that at most two of the light-emitting chips are connected in series in each of the LEDs, so that the Vf value is maintained below 9 V to avoid too high a Vf value, which is beneficial to matching the drive circuit. At the same time, while reducing the number of chips in the LEDs, the multi-LED synthetic spectrum-emitting lamp utilizes the fact that each of the LEDs has different emission peak wavelengths, and the light-emitting chips in each of the LEDs have different emission peak wavelengths, to meet the wave peak settings of the corresponding spectrum, and uses each of the LEDs to emit light jointly to form a light-emitting spectrum similar to the sunlight spectrum, avoiding the use of multi-quantum well chips to ensure the stability of the light-emitting spectrum.

[0079] Preferably, the chip corresponding to the light-emitting spectrum in each of the LEDs has at most two peak waves, that is to say, the light-emitting chips in the same LED can and can only form two different emission peaks. The multi-LED synthetic spectrum-emitting lamp avoids using multi-quantum well chips to prevent the light-emitting spectrum from changing when the drive current changes. At the same time, the multi-LED synthetic spectrum-emitting lamp forms a light-emitting spectrum approaching the sunlight spectrum based on multi-LED synthetic light emission.

[0080] Specifically, referring to the accompanying drawings of the specification of the present invention Figures 3A to 5C, the emission spectra of the corresponding lamp beads selected by the multi-lamp-bead synthetic spectral-emitting lamp in a first embodiment of the present invention and the comparison between the emission spectrum of the multi-lamp-bead synthetic spectral-emitting lamp and the sunlight spectrum are respectively illustrated. In the first embodiment, four light-emitting chips with emission peak wavelengths within an error range of ±2.5 nm being 433 nm, 445 nm, 457 nm, and 470 nm are selected for the multi-lamp-bead synthetic spectral-emitting lamp. The four light-emitting chips are divided into two types of lamp beads in pairs, and for each of the two types of lamp beads, there are two light-emitting chips with different emission peak wavelengths. The corresponding emission spectra of the two types of lamp beads are different. When the two types of lamp beads emit light together, they synthesize an emission spectrum similar to the sunlight spectrum. Thus, while reducing the number of lamp beads, it is possible to avoid having too many chips in a single lamp bead.

[0081] It is worth mentioning that the limitation that the peak interval between two adjacent peaks among the emission peaks formed by each lamp bead is greater than or equal to 5 nm and less than or equal to 20 nm does not limit the peak interval between two adjacent peaks among the emission peaks in a single lamp bead to be less than or equal to 20 nm. That is to say, among the four light-emitting chips selected in the first embodiment, it is not restricted that two light-emitting chips with similar wavelengths must be encapsulated in the same lamp bead. The light-emitting chips can also be encapsulated in pairs in an alternating manner. For example, the light-emitting chips with emission peak wavelengths of 433 nm and 457 nm are encapsulated in the same lamp bead, and the light-emitting chips with emission peak wavelengths of 445 nm and 470 nm are encapsulated in the same lamp bead. When the two lamp beads emit light simultaneously, the formed emission peaks also satisfy that the peak interval between two adjacent peaks is greater than or equal to 5 nm and less than or equal to 20 nm. In other words, in the same lamp bead, the formed emission peaks need to satisfy that the peak interval between two adjacent peaks is greater than or equal to 5 nm. At the same time, particularly, the formed emission peaks in the same lamp bead are further restricted to satisfy that the peak interval between two adjacent peaks is less than or equal to 80 nm, which is beneficial to ensuring the spectral continuity when each lamp bead emits light simultaneously.

[0082] Preferably, in the first embodiment of the present invention, the two light-emitting chips with emission peak wavelengths of 433 nm and 457 nm are serially encapsulated in the same type of lamp bead, correspondingly marked as lamp bead A, and the two light-emitting chips with emission peak wavelengths of 445 nm and 470 nm are serially encapsulated in the same type of lamp bead, correspondingly marked as lamp bead B, which is beneficial to the excitation of the corresponding wavelength conversion materials by each lamp bead. The light-emitting chips in the same lamp bead are connected in series, which is beneficial to ensuring the spectral stability.

[0083] It is worth mentioning that each of lamp bead A and lamp bead B encapsulates two light-emitting chips, and the Vf value of lamp bead A and lamp bead B is about 6V, which is beneficial for matching the corresponding drive circuit.

[0084] Furthermore, in the multi-bead synthetic spectrum-emitting lamp, wavelength conversion materials are also used to perform wavelength conversion matching on the bead A and the bead B respectively, so as to further obtain an emission spectrum approximating the sunlight spectrum. The wavelength conversion materials can be phosphor, quantum dots, quantum rods or nonlinear crystal conversion materials. Specifically, in the present invention, the wavelength conversion material is selected as phosphor, and the phosphor is encapsulated in the bead A and the bead B respectively to perform wavelength conversion matching on the bead A and the bead B respectively.

[0085] Specifically, in the present invention, phosphors with emission peak wavelengths at 494nm, 495nm, 535nm, and 655nm respectively are used to perform wavelength conversion matching on the bead A and the bead B respectively.

[0086] The ratio of the phosphor with the corresponding emission peak wavelength to the encapsulating silica gel is shown in the following table:

[0087]

[0088] Where A and B are two-component silica gel or silicone resin.

[0089] Among them, the emission peak wavelength of the phosphor is allowed to have a fluctuation range of ±5nm, and the corresponding phosphor ratio is allowed to have a fluctuation range of ±15% based on the values shown in the above table. The present invention does not limit this.

[0090] Corresponding to Figures 3A to 3C , the corresponding emission spectrum and color rendering index of the bead A are shown. Corresponding to Figures 4A to 4C , the corresponding emission spectrum and color rendering index of the bead B are shown. Corresponding to the reference Figures 5A to 5C , the emission spectrum and color rendering index of the multi-bead synthetic spectrum-emitting lamp synthesized by the simultaneous emission of the bead A and the bead B are shown. It can be seen from Figure 5A that the emission spectrum of the multi-bead synthetic spectrum-emitting lamp synthesized by connecting the bead A and the bead B in series is relatively close to the sunlight spectrum, and a good full-spectrum lighting effect can be formed. And by comparing Figure 3C , 4C and 5C, it can be known that the color rendering index of a single bead is not excellent. Only when the bead A and the bead B are connected in series and emit light together can the color rendering index reach more than 95, reflecting a high fidelity to colors.

[0091] Furthermore, referring to Figures 6A to 8C, the emission spectra of the corresponding light beads selected for the multi-light-bead synthetic spectrum-emitting lamp of the second embodiment of the present invention and the comparison between the emission spectrum of the multi-light-bead synthetic spectrum-emitting lamp and the sunlight spectrum are respectively shown. Among them, based on the adjustment of the emission peak wavelength and / or ratio of the wavelength conversion material, the adjustment of the emission effect, such as the color temperature, can be achieved. In the second embodiment of the present invention, by adjusting the emission peak wavelength and ratio of the wavelength conversion material in the first embodiment, emission effects with different color temperatures are obtained. Corresponding to the first embodiment, the color temperature is 3000K, and in the second embodiment, the color temperature is 4000K.

[0092] In the second embodiment, the multi-light-bead synthetic spectrum-emitting lamp also selects four light-emitting chips with emission peak wavelengths within an error range of ±2.5 nm being 433 nm, 445 nm, 457 nm, and 470 nm. And a structure in which the four light-emitting chips are connected in series and encapsulated in pairs in the light bead is also provided.

[0093] Among them, the two light-emitting chips with emission peak wavelengths of 433 nm and 457 nm are connected in series and encapsulated in the same light bead, which is correspondingly marked as light bead A, and the two light-emitting chips with emission peak wavelengths of 445 nm and 470 nm are connected in series and encapsulated in the same light bead, which is correspondingly marked as light bead B.

[0094] Specifically, in the second embodiment, phosphors with emission peak wavelengths of 494 nm, 495 nm, 535 nm, 525 nm, and 655 nm are respectively selected to perform wavelength conversion matching on the light bead A and the light bead B.

[0095] Among them, the ratio of the phosphor with the corresponding emission peak wavelength to the encapsulation silica gel is shown in the following table:

[0096]

[0097] Among them, A and B are two-component silica gel or silicone resin.

[0098] Among them, the emission peak wavelength of the phosphor is allowed to have a fluctuation range of ±5 nm, and the corresponding phosphor ratio is allowed to have a fluctuation range of ±15% based on the values shown in the above table. The present invention does not limit this.

[0099] Corresponding to Figures 6A to 6C , the corresponding emission spectrum and color rendering index of the light bead A are shown. Corresponding to Figures 7A to 7C , the corresponding emission spectrum and color rendering index of the light bead B are shown. Corresponding to the reference Figures 8A to 8C , the emission spectrum and color rendering index of the multi-light-bead synthetic spectrum-emitting lamp synthesized by the simultaneous emission of the light bead A and the light bead B in series are shown. From Figure 8AIt can be seen that the emission spectrum of the multi - LED synthetic spectrum - emitting lamp formed by the combination of the LED A and the LED B is relatively close to the solar spectrum, which can form a good full - spectrum lighting effect. And by comparing Figure 6C 、 7C and 8C, it can be known that the color rendering index of a single LED is not excellent. Only when the LED A and the LED B are connected in series and emit light together can the color rendering index reach above 95, reflecting a high color fidelity.

[0100] Further referring to Figures 9A to 12F in the drawings of the specification of the present invention, in the third and fourth embodiments of the present invention, the light - emitting chip selects a double - quantum - well chip with two peak wavelengths in the corresponding emission spectrum. Each of the two LEDs has at most two such double - quantum - well chips, so as to reduce the number of chips in each LED while meeting the corresponding spectral peak settings, and control the Vf value of the LED within 6V and below, which is beneficial to reducing the Vf value and facilitating the matching of the drive circuit.

[0101] Preferably, in the third and fourth embodiments of the present invention, each of the two LEDs has exactly one double - quantum - well chip, so that the Vf value of the LED is maintained at about 3V, which is beneficial to reducing the Vf value and can match a general drive circuit.

[0102] It is worth mentioning that the peak - to - peak interval of the two peaks of the double - quantum - well chip selected in the present invention is less than or equal to 20nm, so as to ensure the stability of the emission spectrum under different drive currents and ensure the corresponding lighting effect.

[0103] In particular, the peak - to - peak interval of the two peaks of the double - quantum - well chip selected in the present invention is greater than or equal to 8nm, so as to be beneficial to ensuring the spectral continuity of each LED and effectively reducing the gaps and spikes in the spectrum.

[0104] Specifically, defining the two peak wavelengths of the double - quantum - well chip as the first peak wavelength and the second peak wavelength, corresponding to the third embodiment of the present invention, the emission peak wavelength of the first peak wavelength of the double - quantum - well chip of one of the LEDs is 435nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wavelength is 445nm within an error range of ±2.5nm, marked as LED A. The emission peak wavelength of the first peak wavelength of the double - quantum - well chip of the other LED is 457nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wavelength is 470nm within an error range of ±2.5nm, marked as LED B, effectively ensuring the continuity and stability of the combined emission spectrum when the two LEDs emit light simultaneously.

[0105] Further, in the multi - bead synthetic spectral - emitting lamp, wavelength - conversion materials are respectively encapsulated in Lamp Bead A and Lamp Bead B to perform wavelength - conversion matching on Lamp Bead A and Lamp Bead B respectively, so as to further obtain an emission spectrum approximating the sunlight spectrum.

[0106] Specifically, in the present invention, wavelength - conversion matching is performed on the chip by phosphors with emission peak wavelengths at 494nm, 535nm, 495nm, 655nm, 733nm, 795nm, 821nm, 605nm, and 525nm respectively.

[0107] The ratios of the phosphors with corresponding emission peak wavelengths to the encapsulating silica gel are shown in the following table:

[0108]

[0109] Where A and B are two - component silica gel or silicone resin.

[0110] Among them, the emission peak wavelength of the phosphor is allowed to have a fluctuation range of ±5nm, and the corresponding phosphor ratio is allowed to have a fluctuation range of ±15% based on the values shown in the above - mentioned table. The present invention does not limit this.

[0111] Corresponding to Figures 9A to 9C , the corresponding emission spectrum and color rendering index of Lamp Bead A are shown. Corresponding to Figures 10A to 10C , the corresponding emission spectrum and color rendering index of Lamp Bead B are shown. Corresponding to the reference Figures 11A to 11C , the emission spectrum and color rendering index of the multi - bead synthetic spectral - emitting lamp synthesized by the simultaneous emission of Lamp Bead A and Lamp Bead B are shown. It can be seen from Figure 11A that the emission spectrum of the multi - bead synthetic spectral - emitting lamp synthesized by the series connection and simultaneous emission of Lamp Bead A and Lamp Bead B is relatively close to the sunlight spectrum, and a good full - spectrum lighting effect can be formed. And by comparing Figure 9C , 10C and 11C, it can be known that the color rendering index of a single lamp bead is not excellent. Only when Lamp Bead A and Lamp Bead B are connected in series and emit light together can the color rendering index reach a relatively high level, reflecting a high color fidelity.

[0112] It is worth mentioning that on the basis of using two lamp beads, lamp beads can be further selected to further make the corresponding synthetic emission spectrum closer to the sunlight spectrum. Specifically, referring to Figures 12A to 12DAs shown, the multi - bead synthetic spectrum - emitting lamp further includes another bead with an emission peak wavelength different from those of the two beads within the wavelength band range of 300nm - 500nm for the peak wavelength, so as to further obtain an emission spectrum closer to the sunlight spectrum based on the simultaneous emission of multiple beads.

[0113] Among them, for the fourth embodiment of the present invention, the three selected beads all use double - quantum - well chips, and there is exactly one double - quantum - well chip. Define the two peak waves of the double - quantum - well chip as the first peak wave and the second peak wave. Corresponding to the fourth embodiment of the present invention, for the double - quantum - well chips of the three beads, the emission peak wavelength of the first peak wave of the double - quantum - well chip of bead A is 405nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 420nm within an error range of ±2.5nm. Denote the bead where this double - quantum - well chip is located as bead A; the emission peak wavelength of the first peak wave of the double - quantum - well chip of bead B is 442nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 455nm within an error range of ±2.5nm. Denote the bead where this double - quantum - well chip is located as bead B; the emission peak wavelength of the first peak wave of the double - quantum - well chip of bead C is 468nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 480nm within an error range of ±2.5nm. Denote the bead where this double - quantum - well chip is located as bead C, so as to synthesize an emission spectrum closer to the sunlight spectrum.

[0114] Corresponding to Figure 12A , the corresponding emission spectrum of bead A is shown. Corresponding to Figure 12B , the corresponding emission spectrum of bead B is shown. Corresponding to Figure 12C , the corresponding emission spectrum of bead C is shown.

[0115] Furthermore, the multi - bead synthetic spectrum - emitting lamp also seals the wavelength - conversion materials to bead A, bead B, and bead C respectively to perform wavelength - conversion matching on bead A, bead B, and bead C respectively, so as to further obtain an emission spectrum approximate to the sunlight spectrum.

[0116] Specifically, the present invention performs wavelength - conversion matching on the chips through phosphors with emission peak wavelengths of 494nm, 535nm, 495nm, 655nm, 733nm, 795nm, 821nm, 605nm, and 525nm respectively.

[0117] The ratios of the phosphors with corresponding emission peak wavelengths to the encapsulation silica gel are shown in the following table:

[0118]

[0119] Wherein A and B are two-component silica gels or silicone resins.

[0120] Wherein, the emission peak wavelength of the phosphor is allowed to have a fluctuation range of ±5 nm, and the corresponding phosphor ratio is allowed to have a fluctuation range of ±15% based on the values shown in the above table, and the present invention does not limit this.

[0121] Corresponding reference Figure 12D , after encapsulating the wavelength conversion material, the lamp beads A, the lamp bead B, and the lamp bead C emit light simultaneously to jointly synthesize the emission spectrum of the multi-lamp bead synthetic spectrum-emitting lamp, and from Figure 12D It can be seen that the emission spectrum of the multi-lamp bead synthetic spectrum-emitting lamp jointly synthesized by the lamp beads A, the lamp bead B, and the lamp bead C is very close to the sunlight spectrum, and a good full-spectrum lighting effect can be formed.

[0122] Particularly, to further match the spectrum in the wavelength range of 380 nm - 400 nm of the sunlight spectrum, on the basis of the fourth embodiment, the multi-lamp bead synthetic spectrum-emitting lamp further includes a single-peak lamp bead having a different emission peak wavelength from the above three lamp beads in the wavelength range of 300 nm - 500 nm of the peak wavelength. The single-peak lamp bead has and only has a light-emitting chip with an emission peak wavelength within an error range of ±2.5 nm being 380 nm. In some embodiments, a lamp bead with and only having a double quantum well chip can also be selected. The peak interval of the double quantum well chip of the lamp bead is greater than or equal to 5 nm and less than or equal to 10 nm, and the emission peak wavelength is in the wavelength range of 380 nm to 431 nm.

[0123] Specific reference Figure 12E , the corresponding emission spectrum of the single-peak lamp bead is shown.

[0124] Corresponding reference Figure 12F , after encapsulating the wavelength conversion material, the single-peak lamp bead, the lamp bead A, the lamp bead B, and the lamp bead C are connected in series and emit light simultaneously to jointly synthesize the emission spectrum of the multi-lamp bead synthetic spectrum-emitting lamp, and from Figure 12F It can be known that by comparing the emission spectrum of the multi-lamp bead synthetic spectrum-emitting lamp jointly synthesized by the single-peak lamp bead, the lamp bead A, the lamp bead B, and the lamp bead C with the sunlight spectrum, the emission spectrum of the multi-lamp bead synthetic spectrum-emitting lamp is closer to the sunlight spectrum.

[0125] It is worth mentioning that in the embodiments of the present invention, specific comparison Figure 3C 、 4C and 5C, Figure 6C 、 7C and 8C, Figure 9C, 10C and 11C, the light quality evaluation indexes when each of the lamp beads emits light together are better than those of a single lamp bead, and the evaluation indexes include but are not limited to CRI Ra, the average value of CRI R1-R15, and Rf, etc.

[0126] To further understand the present invention, the present invention also provides a multi-lamp-bead synthetic spectral emission method, wherein lamp beads with an emission peak difference of ≥5 nm in the wavelength range of 300 nm - 500 nm are defined as lamp beads of different types, and the multi-lamp-bead synthetic spectral emission method includes the steps:

[0127] A. Select at least two types of lamp beads, wherein each lamp bead has at most three light-emitting chips, and the light-emitting chips in the same lamp bead can form at least two different emission peaks;

[0128] B. Light up each of the lamp beads together, wherein the peak interval between two adjacent peaks among the emission peaks formed by each of the lamp beads together is greater than or equal to 5 nm and less than or equal to 20 nm, and the corresponding emission spectrum synthesized by the simultaneous emission of each of the lamp beads is the emission spectrum formed by the multi-lamp-bead synthetic spectral emission method.

[0129] In the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0130] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been demonstrated and explained in the embodiments, and without departing from the said principle, the embodiments of the present invention can have any deformation or modification.

Claims

1. A multi-lamp-bead composite spectral luminaire, characterized in that: The lamp beads having an emission peak difference of ≥5nm within the waveband range of 300nm-500nm are defined as different types of lamp beads, and the multi-lamp bead synthetic spectral luminous lamp includes at least two types of lamp beads, wherein each type of the lamp beads has at most three light-emitting chips, and the light-emitting chips in the same lamp bead can form at least two different emission peaks, wherein the peak interval between two adjacent peaks in each emission peak formed by the lamp beads is greater than or equal to 5nm and less than or equal to 20nm, wherein the different types of the lamp beads are connected in series, and the corresponding luminous spectrum synthesized by the simultaneous luminescence of each of the lamp beads is the luminous spectrum of the multi-lamp bead synthetic spectral luminous lamp.

2. According to claim 1, the multi-lamp bead synthetic spectral luminous lamp, wherein the lamp bead selects a double quantum well chip with two peak waves corresponding to the luminous spectrum, each of the lamp beads has at most two double quantum well chips, and the peak interval between the two peaks of each double quantum well chip is greater than or equal to 8nm and less than or equal to 20nm.

3. According to claim 2, the multi-lamp bead synthetic spectral luminous lamp, wherein the two peak waves of the double quantum well chip are defined as the first peak wave and the second peak wave, wherein the emission peak wavelength of the first peak wave of the double quantum well chip of one type of lamp bead is 435nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 445nm within the error range of ±2.5nm, and the emission peak wavelength of the first peak wave of the double quantum well chip of another type of lamp bead is 457nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 470nm within the error range of ±2.5nm.

4. The multi-lamp bead synthetic spectral luminescent lamp according to claim 2, wherein the multi-lamp bead synthetic spectral luminescent lamp further includes another lamp bead having a different emission peak wavelength from the above two lamp beads within the wavelength band of 300nm-500nm, the other lamp bead also uses a double quantum well chip, and there is only one double quantum well chip, wherein the double quantum well chips of the three types of lamp beads are respectively a double quantum well chip in which the emission peak wavelength of the first peak wave is 405nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 420nm within the error range of ±2.5nm, a double quantum well chip in which the emission peak wavelength of the first peak wave is 442nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 455nm within the error range of ±2.5nm, and a double quantum well chip in which the emission peak wavelength of the first peak wave is 468nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 480nm within the error range of ±2.5nm.

5. The multi-lamp synthetic spectral luminous lamp according to claim 4, wherein the multi-lamp synthetic spectral luminous lamp further includes a single-peak lamp bead having a different emission peak wavelength from the above three lamp beads within the wavelength band of 300nm-500nm, and the single-peak lamp bead has only one light-emitting chip with an emission peak wavelength of 380nm within the error range of ±2.5nm.

6. A multi-lamp synthetic spectral luminous lamp according to any one of claims 3 to 5, wherein the wavelength conversion materials with emission peak wavelengths at 494nm±5nm, 535nm±5nm, 495nm±5nm, 655nm±5nm, 733nm±5nm, 795nm±5nm, 821nm±5nm, 605nm±5nm, and 525nm±5nm are used to match the wavelength conversion of each of the lamp beads.

7. According to claim 6, the multi-lamp synthetic spectral luminous lamp, wherein the wavelength conversion material is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:535nm:495nm:655nm:733nm:795nm:821nm:605nm:525nm=0.29:2.9:0.11:0.504:0.03:0.1155:0.7:0.3:0.3:0.0665:0.136, wherein A and B are two-component silica gel or silicone resin.

8. The multi-lamp synthetic spectral luminous lamp according to claim 1, wherein the multi-lamp synthetic spectral luminous lamp comprises four light-emitting chips whose emission peak wavelengths are 433nm, 445nm, 457nm and 470nm within the error range of ±2.5nm, and the four light-emitting chips are divided into two types of lamp beads in pairs, and the corresponding two types of lamp beads each have two light-emitting chips with different emission peak wavelengths, and the two light-emitting chips of the same lamp bead are connected in series.

9. The multi-lamp-bead synthetic spectral luminous lamp according to claim 8, wherein the two light-emitting chips with emission peak wavelengths of 433nm and 457nm belong to the same lamp bead, and the two light-emitting chips with emission peak wavelengths of 445nm and 470nm belong to the same lamp bead.

10. The multi-lamp synthetic spectral luminous lamp according to claim 9, wherein wavelength conversion materials with emission peak wavelengths at 494nm±5nm, 495nm±5nm, 535nm±5nm, and 655nm±5nm are used to perform wavelength conversion matching on each of the lamp beads.

11. The multi-lamp synthetic spectral luminous lamp according to claim 10, wherein the wavelength conversion material is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:495nm:535nm:655nm=0.85:8.5:0.14:0.48:5.13:0.77, wherein A and B are two-component silica gel or silicone resin.

12. The multi-lamp synthetic spectral luminous lamp according to claim 9, wherein wavelength conversion materials with emission peak wavelengths at 494nm±5nm, 495nm±5nm, 535nm±5nm, 525nm±5nm and 655nm±5nm are used to perform wavelength conversion matching on each of the lamp beads.

13. According to claim 12, the multi-lamp synthetic spectral luminous lamp, wherein the wavelength conversion material is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:495nm:535nm:525nm:655nm=0.82:8.2:0.16:0.03:3.06:0.429:0.48, wherein A and B are two-component silica gel or silicone resin.

14. A multi-lamp synthesis type spectrum luminescence method, characterized in that: The lamp beads with emission peak difference of ≥5nm in the wavelength range of 300nm-500nm are defined as different types of lamp beads, and the multi-lamp bead synthesis type spectrum luminescence method comprises the steps of: A. Select at least two types of lamp beads, wherein each type of lamp bead has at most two light-emitting chips, and the light-emitting chips in the same lamp bead can form at least two different emission peaks; B. Lighting up the lamp beads together, wherein the peak interval between two adjacent peaks in each emission peak jointly formed by the lamp beads is greater than or equal to 5nm and less than or equal to 20nm.

15. The method for synthesizing spectral light emission using multiple lamp beads according to claim 14, wherein in step A, the light-emitting chips selected from the various lamp beads are double quantum well chips having two peaks in the corresponding light-emitting spectrum, and each lamp bead has only one double quantum well chip, wherein the peak interval between the two peaks of each double quantum well chip is greater than or equal to 8 nm and less than or equal to 20 nm.

16. According to the multi-lamp bead synthetic spectral luminescence method according to claim 15, the two peak waves of the double quantum well chip are defined as the first peak wave and the second peak wave, wherein the emission peak wavelength of the first peak wave of the double quantum well chip of one type of lamp bead is 435nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 445nm within the error range of ±2.5nm, and the emission peak wavelength of the first peak wave of the double quantum well chip of another type of lamp bead is 457nm within the error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 470nm within the error range of ±2.5nm.

17. The method for synthesizing spectral light emission using multiple lamp beads according to claim 15, wherein said step A further comprises step a1: selecting another lamp bead having a different emission peak wavelength from the two lamp beads within a wavelength band of 300nm-500nm, said another lamp bead also selecting a double quantum well chip, and there is only one said double quantum well chip, wherein said double quantum well chips of three types of said lamp beads are respectively a double quantum well chip in which the emission peak wavelength of the first peak wave is 405nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 420nm within an error range of ±2.5nm, a double quantum well chip in which the emission peak wavelength of the first peak wave is 442nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 455nm within an error range of ±2.5nm, and a double quantum well chip in which the emission peak wavelength of the first peak wave is 468nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak wave is 480nm within an error range of ±2.5nm.

18. The method for synthesizing spectral light emission from multiple lamp beads according to claim 17, wherein the step A further comprises step a2: selecting a single-peak lamp bead having an emission peak wavelength different from the three lamp beads in the wavelength band of 300nm-500nm, wherein the single-peak lamp bead has only one light-emitting chip with an emission peak wavelength of 380nm within an error range of ±2.5nm.

19. The method for synthesizing spectral luminescence using multiple lamp beads according to any one of claims 16 to 18, wherein before step B, the method further comprises a step C: using wavelength conversion materials having emission peak wavelengths at 494nm±5nm, 535nm±5nm, 495nm±5nm, 655nm±5nm, 733nm±5nm, 795nm±5nm, 821nm±5nm, 605nm±5nm, and 525nm±5nm to perform wavelength conversion matching on each of the lamp beads.

20. The multi-lamp synthetic spectral luminescence method according to claim 19, wherein the wavelength conversion material selected in step C is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:535nm:495nm:655nm:733nm:795nm:821nm:605nm:525nm=0.29:2.9:0.11:0.504:0.03:0.1155:0.7:0.3:0.3:0.0665:0.136, wherein A and B are two-component silica gel or silicone resin.

21. The multi-lamp bead synthetic spectral luminescence method according to claim 14, wherein the lamp beads selected in step A are lamp beads each including two light-emitting chips, wherein the lamp beads selected in step A have a total of four light-emitting chips whose emission peak wavelengths are 433nm, 445nm, 457nm and 470nm within an error range of ±2.5nm, and the four light-emitting chips are divided into two lamp beads in pairs, and the corresponding two lamp beads each have two light-emitting chips with different emission peak wavelengths, and the two light-emitting chips of the same lamp bead are connected in series.

22. The multi-lamp bead synthetic spectral luminescence method according to claim 21, wherein among the lamp beads selected in step A, one type of lamp bead includes two light-emitting chips with emission peak wavelengths of 433nm and 457nm, and another type of lamp bead includes two light-emitting chips with emission peak wavelengths of 445nm and 470nm.

23. The method for synthesizing spectral light emission from multiple lamp beads according to claim 22, wherein before step B, the method further comprises a step C: using wavelength conversion materials having emission peak wavelengths at 494nm±5nm, 495nm±5nm, 535nm±5nm, and 655nm±5nm to perform wavelength conversion matching on each of the lamp beads.

24. According to the multi-lamp synthetic spectral luminescence method described in claim 23, the wavelength conversion material selected in step C is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:495nm:535nm:655nm=0.85:8.5:0.14:0.48:5.13:0.77, wherein A and B are two-component silica gel or silicone resin.

25. The method for synthesizing spectral light emission using multiple lamp beads according to claim 22, wherein before step B, the method further comprises a step C: using wavelength conversion materials having emission peak wavelengths at 494nm±5nm, 495nm±5nm, 535nm±5nm, 525nm±5nm and 655nm±5nm to perform wavelength conversion matching on each of the lamp beads.

26. According to the multi-lamp synthetic spectral luminescence method described in claim 25, the wavelength conversion material selected in step C is fluorescent powder, wherein the fluorescent powder is dispersed in transparent silica gel or silicone resin, and the ratio of the corresponding emission peak wavelength of the fluorescent powder in the transparent silica gel or silicone resin within the error range of ±15% is A:B:494nm:495nm:535nm:525nm:655nm=0.82:8.2:0.16:0.03:3.06:0.429:0.48, wherein A and B are two-component silica gel or silicone resin.

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