Multi-lamp-bead synthesis type spectrum-based light-emitting lamp

Abstract

The utility model provides a multi-lamp-bead synthesis type spectrum light-emitting lamp, which is characterized in that lamp beads of which the emission peak difference is larger than or equal to 5nm in the wave band range of 300nm-500nm are different types of lamp beads, and the emission peak difference is larger than or equal to 5nm in the wave band range of 300nm-500nm. 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 four 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 utility model relates to the field of lighting, especially a multi-lamp pearl synthetic type spectrum emitting lamp. BACKGROUND

[0002] With the continuous development of LED lighting technology, people not only meet the traditional lighting needs, but also put forward higher requirements on the quality and comfort of lighting, especially in recent years, people realize that light and eye health, biological rhythm are closely related, and people's demand for healthy lighting is also increasing, so researchers are constantly pursuing lamp lighting effects comparable to sunlight, but in fact, it is not simple to achieve better sunlight spectrum lighting.

[0003] Specifically, in order to form the distribution effect of the wave peak and wave trough similar to the sunlight spectrum, the existing more common technology is to use a multi-quantum well chip to achieve, referring to Figure 1A and Figure 1B As shown, corresponding to Figure 1A is the light emitting spectrum of an existing three-quantum well chip under the driving of 30mA, Figure 1B is the light emitting spectrum of the existing three-quantum well chip under the driving of 150mA, as can be seen from the figure, the light emitting spectrum corresponding to the three-quantum well chip has at least three wave peaks, so as to realize the light emitting spectrum close to the sunlight spectrum. However, in actual application, the competition of carriers between multi-quantum wells will intensify, as can be seen from Figure 1A and Figure 1B , the peak value of multi-wavelength changes greatly under different driving currents, the spectrum peak value located in the longer wavelength band will decrease and the spectrum peak value located in the shorter wavelength band will relatively rise, resulting in that the actual light emitting spectrum of the three-quantum well chip deviates greatly from the sunlight spectrum, and the evaluation index of light quality also greatly decreases. And even if four quantum wells or even five quantum wells are set, there will still be problems of too long interval wavelength or missing of some wavelengths, and the final spectrum continuity is poor. At the same time, the production yield of the multi-quantum well chip is low, and the cost is high.

[0004] Therefore, researchers also put forward another technical solution, simulate sunlight through multiple blue light chips with different peak wavelengths, and get the light emitting spectrum of the sunlight spectrum close to the visible light band through exciting yellow-green fluorescent powder and red fluorescent powder, for example, the spectrum emitting method and spectrum emitting lamp disclosed in Chinese patent publication No. CN118129090A, which gets the light emitting spectrum comparable to the sunlight spectrum through reasonable matching of the wavelength and half-wave width of each light source, referring to Figure 2A and Figure 2B As shown, corresponding to Figure 2A is the light emitting spectrum of a blue light chip based on three different peak wavelengths under the driving of 30mA,Figure 2B The emission spectrum of blue light chips with three different peak wavelengths under 150mA driving is shown. This technical solution shows that the peak value changes relatively stably under different current driving conditions. However, using a single-peak blue light chip and encapsulating it with wavelength conversion material cannot achieve a emission spectrum close to that of sunlight. Only by using three or more blue light chips with different peak wavelengths and wavelength conversion material can a emission spectrum close to that of sunlight be achieved. Connecting multiple chips in parallel can ensure that the Vf (forward voltage) value of the corresponding LED is consistent with that of a single-chip LED. However, since the Vf characteristic curves of chips with different peak wavelengths are different, the current distributed to each chip will be significantly unbalanced when the driving current is different, resulting in changes in the spectrum. Therefore, only by connecting multiple chips in series can the stability of the spectrum under different current conditions be guaranteed. However, the Vf (forward voltage) value of an LED formed by encapsulating multiple chips in series will be a multiple of the number of chips in a single chip. For example, the Vf value of an LED formed by encapsulating three blue light chips with different peak wavelengths in series is about 9V, which is difficult to match with existing mainstream drivers, leading to increased cost and matching difficulty. Utility Model Content

[0005] One objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp and the multi-LED composite spectrum-based light-emitting method can form a light emission spectrum that is similar to the solar spectrum, and avoids the use of multiple quantum well chips to ensure a stable light emission spectrum when the driving current changes, thus avoiding significant deviations between the light emission spectrum and the solar spectrum due to changes in the driving current.

[0006] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp and the multi-LED composite spectrum-based light-emitting method, when using multiple chips to form a light emission spectrum similar to that of sunlight, can also avoid excessively high Vf values, which is beneficial for matching the driving circuit and achieving illumination comparable to sunlight.

[0007] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp and the multi-LED composite spectrum-based light-emitting method employ at least two types of LEDs with different emission peak wavelengths to synthesize light emission, thereby forming a light emission spectrum similar to that of sunlight. Based on the concept of multi-LED composite light emission, each emission peak of the target light emission spectrum is formed by at least two different types of LEDs, thereby reducing the number of chips in a single LED compared to the number of chips in existing LEDs that form the entire light emission spectrum using a single LED, thus avoiding excessively high Vf values.

[0008] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein LEDs with an emission peak difference of ≥5nm within the 300nm-500nm wavelength range are defined as different types of LEDs. The multi-LED composite spectrum-based light-emitting lamp includes at least two types of LEDs, wherein each type of LED has at most four light-emitting chips, and the light-emitting chips in the same LED can form at least two different emission peaks. The LEDs emit light simultaneously, together forming a light emission spectrum that is similar to the solar spectrum.

[0009] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the LEDs in the multi-LED composite spectrum-based light-emitting lamp are selected to meet the following condition: among the emission peaks formed by all the LEDs 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 objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein up to four of the LED chips are connected in series in each LED to avoid excessively high Vf values ​​and to facilitate matching the driving circuit.

[0011] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein each of the LEDs has a different emission peak wavelength, and the light-emitting chip in each LED can form a different emission peak, thereby satisfying the peak setting of the corresponding spectrum, and using the LEDs to emit light together to form a light emission spectrum that approximates the solar spectrum.

[0012] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp includes four light-emitting chips with emission peak wavelengths of 433nm, 445nm, 457nm, and 470nm within an error range of ±2.5nm. Preferably, the four light-emitting chips are paired and belong to two different types of LEDs, with each type of LED having two light-emitting chips with different emission peak wavelengths, and there are exactly two light-emitting chips. The corresponding emission spectra of the two types of LEDs are different, wherein all the LEDs emit light together to synthesize an emission spectrum that is similar to the solar spectrum.

[0013] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein two light-emitting chips with emission peak wavelengths of 433nm and 457nm belong to the same LED, and two light-emitting chips with emission peak wavelengths of 445nm and 470nm belong to the same LED, so as to facilitate the excitation of the corresponding wavelength conversion material by each LED.

[0014] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein the light-emitting chip is a dual quantum well chip with two peaks in the corresponding emission spectrum, and each of the two types of LEDs has at most two of the dual quantum well chips, so as to reduce the number of chips in each LED while satisfying the corresponding spectral peak settings, which is beneficial to reduce the Vf value and can be universally matched with the driving circuit.

[0015] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein the peak interval between the two peaks of the dual quantum well chip is less than or equal to 20 nm, thereby ensuring the stability of the emission spectrum under different driving currents and ensuring the corresponding lighting effect.

[0016] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein the peak interval between the two peaks of the dual quantum well chip is greater than or equal to 8 nm, which helps to ensure the spectral continuity of each LED and effectively reduce gaps and spikes in the spectrum.

[0017] Another objective of this invention is to provide a multi-LED chip-based spectral emission lamp, wherein the two peaks of the dual quantum well chip are defined as the first peak and the second peak. In one type of LED chip, the emission peak wavelength of the first peak is 435nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak is 445nm within an error range of ±2.5nm. In another type of LED chip, the emission peak wavelength of the first peak is 457nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak is 470nm within an error range of ±2.5nm. This effectively ensures the continuity and stability of the emission spectrum synthesized when the two LED chips emit light simultaneously.

[0018] Another objective of this invention is to provide a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp further includes another LED with a different emission peak wavelength than the two types of LEDs mentioned above in the wavelength range of 300nm-500nm, thereby obtaining a light emission spectrum that is close to the solar spectrum based on the simultaneous emission of multiple LEDs.

[0019] Another objective of this invention is to provide a multi-LED chip-based spectral-based light-emitting lamp, wherein the other type of LED chip also uses a dual quantum well chip. Specifically, the dual quantum well chips of the three types of LED chips are: a dual quantum well chip with a first peak emission wavelength of 405nm and a second peak emission wavelength of 420nm within an error range of ±2.5nm; a dual quantum well chip with a first peak emission wavelength of 442nm and a second peak emission wavelength of 455nm within an error range of ±2.5nm; and a dual quantum well chip with a first peak emission wavelength of 468nm and a second peak emission wavelength of 480nm within an error range of ±2.5nm, to synthesize a light emission spectrum that more closely approximates the solar spectrum.

[0020] Another objective of this invention is to provide a multi-LED composite spectral light-emitting lamp, wherein wavelength conversion materials are used to perform wavelength conversion matching on each of the LEDs to further obtain a light emission spectrum that approximates the solar spectrum.

[0021] According to one aspect of the present invention, the present invention provides a multi-LED composite spectrum-based light-emitting lamp, wherein LEDs having an emission peak difference of ≥5nm within the 300nm-500nm wavelength range are defined as different types of LEDs. The multi-LED composite spectrum-based light-emitting lamp includes at least two types of LEDs, wherein each type of LED has at most four light-emitting chips, and the light-emitting chips in the same LED can form at least two different emission peaks, wherein the peak interval between two adjacent peaks in the emission peaks formed by the LEDs is greater than or equal to 5nm and less than or equal to 20nm, wherein the different types of LEDs are connected in series, and the corresponding emission spectrum synthesized by the simultaneous emission of the LEDs is the emission spectrum of the multi-LED composite spectrum-based light-emitting lamp.

[0022] In one embodiment, the lamp bead is selected as a dual quantum well chip with two peaks in the corresponding emission spectrum, and each lamp bead has at most two dual quantum well chips, wherein the peak interval between the two peaks of each dual 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 of the dual quantum well chip are defined as a first peak wave and a second peak wave. In one type of LED chip, the emission peak wavelength of the first peak wave of the dual quantum well chip 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. In another type of LED chip, the emission peak wavelength of the first peak wave of the dual quantum well chip 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.

[0024] In one embodiment, the multi-LED composite spectral luminaire further includes another LED with a different emission peak wavelength than the two types of LEDs in the wavelength range of 300nm-500nm. This other LED also uses a dual quantum well chip, and there is one and only one dual quantum well chip. The dual quantum well chips of the three types of LEDs are: a dual quantum well chip with an emission peak wavelength of 405nm within an error range of ±2.5nm for the first peak wavelength and 420nm within an error range of ±2.5nm for the second peak wavelength; a dual quantum well chip with an emission peak wavelength of 442nm within an error range of ±2.5nm for the first peak wavelength and 455nm within an error range of ±2.5nm for the second peak wavelength; and a dual quantum well chip with an emission peak wavelength of 468nm within an error range of ±2.5nm for the first peak wavelength and 480nm within an error range of ±2.5nm for the second peak wavelength.

[0025] In one embodiment, the multi-LED composite spectrum-based light-emitting lamp further includes a single-peak LED with a different emission peak wavelength than the three types of LEDs in the wavelength range of 300nm-500nm. The single-peak LED has only one light-emitting chip with an emission peak wavelength of 380nm within an error range of ±2.5nm.

[0026] In one embodiment, wavelength conversion materials with emission peak wavelengths of 494nm±5nm, 535nm±5nm, 495nm±5nm, 655nm±5nm, 733nm±5nm, 795nm±5nm, 821nm±5nm, 605nm±5nm, and 525nm±5nm are used to perform wavelength conversion matching on each of the lamp beads.

[0027] In one embodiment, the multi-LED composite spectrum-based light-emitting lamp includes four light-emitting chips with emission peak wavelengths of 433nm, 445nm, 457nm, and 470nm within an error range of ±2.5nm. The four light-emitting chips are paired and belong to two different types of LEDs. Each type of LED has two light-emitting chips with different emission peak wavelengths, and the two light-emitting chips of the same LED are connected in series.

[0028] In one embodiment, two light-emitting chips with emission peak wavelengths of 433nm and 457nm belong to the same lamp bead, and two light-emitting chips with emission peak wavelengths of 445nm and 470nm belong to the same lamp bead.

[0029] In one embodiment, wavelength conversion materials with emission peak wavelengths of 494nm±5nm, 495nm±5nm, 535nm±5nm, and 655nm±5nm are used to perform wavelength conversion matching on each of the lamp beads.

[0030] In one embodiment, wavelength conversion materials with emission peak wavelengths of 494nm±5nm, 495nm±5nm, 535nm±5nm, 525nm±5nm, and 655nm±5nm are used to perform wavelength conversion matching on each of the lamp beads.

[0031] The further objectives and advantages of this invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0032] Figure 1A The emission spectrum of an existing three-quantum-well chip under 30mA driving is shown.

[0033] Figure 1B The emission spectrum of an existing triple quantum well chip under 150mA drive is shown.

[0034] Figure 2A The emission spectrum of a blue light chip with three different peak wavelengths under 30mA drive is shown.

[0035] Figure 2B The emission spectrum of blue light chips with three different peak wavelengths under 150mA drive is shown.

[0036] Figures 3A to 3C This is a schematic diagram showing the corresponding emission spectrum and color rendering index of a lamp in a multi-LED composite spectral luminous lamp according to a first embodiment of the present invention.

[0037] Figures 4A to 4CThis is a schematic diagram showing the corresponding emission spectrum and color rendering index of another LED in the multi-LED composite spectral luminous lamp according to the first embodiment of the present invention.

[0038] Figures 5A to 5C This is a schematic diagram comparing the emission spectrum of the multi-LED composite spectral luminous lamp according to the first embodiment of the present invention with the solar spectrum and its color rendering index.

[0039] Figures 6A to 6C This is a schematic diagram showing the corresponding emission spectrum and color rendering index of a lamp bead in a multi-bead composite spectral luminous lamp according to a second embodiment of the present invention.

[0040] Figures 7A to 7C This is a schematic diagram showing the corresponding emission spectrum and color rendering index of another LED in the multi-LED composite spectral luminous lamp according to the second embodiment of the present invention.

[0041] Figures 8A to 8C This is a schematic diagram comparing the emission spectrum of the multi-LED composite spectral luminous lamp according to the second embodiment of the present invention with the solar spectrum and its color rendering index.

[0042] Figures 9A to 9C This is a schematic diagram showing the corresponding emission spectrum and color rendering index of a single LED in a multi-LED composite spectral luminous lamp according to a third embodiment of the present invention.

[0043] Figures 10A to 10C This is a schematic diagram showing the corresponding emission spectrum and color rendering index of another LED in the multi-LED composite spectral luminous lamp according to the third embodiment of the present invention.

[0044] Figures 11A to 11C This is a schematic diagram comparing the emission spectrum of the multi-LED composite spectral luminous lamp according to the third embodiment of the present invention with the solar spectrum and its color rendering index.

[0045] Figure 12A This is a schematic diagram of the corresponding emission spectrum of a lamp bead in a multi-bead composite spectral light-emitting lamp according to a fourth embodiment of the present invention.

[0046] Figure 12B This is a schematic diagram of the corresponding emission spectrum of another LED in the multi-LED composite spectral luminous lamp according to the fourth embodiment of the present invention.

[0047] Figure 12C This is a schematic diagram of the corresponding emission spectrum of another lamp in the multi-lamp chip composite spectral luminous lamp according to the fourth embodiment of the present invention.

[0048] Figure 12DThis is a schematic diagram comparing the emission spectrum of the multi-LED composite spectral light-emitting lamp according to the fourth embodiment of the present invention with the solar spectrum.

[0049] Figure 12E This is a schematic diagram of the emission spectrum of a single-peak lamp bead in a modified embodiment of the multi-LED composite type spectrum-emitting lamp according to the fourth embodiment of the present invention.

[0050] Figure 12F This is a schematic diagram comparing the emission spectrum of the multi-LED composite type spectrum-based luminous lamp according to the fourth embodiment of the present invention with the solar spectrum. Detailed Implementation

[0051] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0052] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0053] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0054] This invention provides a multi-LED composite spectrum-based light-emitting lamp, wherein the multi-LED composite spectrum-based light-emitting lamp synthesizes the corresponding emission spectrum by emitting light from multiple LEDs simultaneously, and avoids the use of multiple quantum well chips to ensure a stable emission spectrum when the driving current changes. This avoids significant deviations between the emission spectrum and the solar spectrum caused by changes in the driving current, and also avoids packaging too many chips in a single LED to avoid excessively high Vf values. This is beneficial for matching the driving circuit and achieving lighting comparable to sunlight.

[0055] Specifically, the lamp beads with a ≥5nm emission peak difference in the 300nm-500nm wavelength range are defined as different types of lamp beads. The multi-lamp bead synthesis type spectrum-based light-emitting lamp uses at least two types of lamp beads to synthesize light emission, and the at least two types of lamp beads can form at least two different emission peaks to form a light emission spectrum similar to the solar spectrum. Based on the idea of ​​multi-lamp bead synthesis light emission, this invention forms each emission peak of the target light emission spectrum by at least two different types of lamp beads, so that the number of chips in a single lamp bead is reduced compared to the number of chips in existing lamp beads that form the entire light emission spectrum using a single lamp bead. For example, when 6 emission peaks are required, the existing technology uses a solution of encapsulating 6 chips with different emission peak wavelengths in the same lamp bead. In this invention, one lamp bead forms three of the emission peaks, and the number of chips in that lamp bead can be controlled to a maximum of three. Another lamp bead forms the other three emission peaks, thereby reducing the number of chips compared to existing lamp beads, corresponding to a reduced Vf value, which is beneficial for matching the corresponding driver.

[0056] Preferably, in this invention, each type of LED bead has at most four chips to control the number of chips while satisfying the corresponding emission peak settings. That is, the LED bead of this invention does not include cases where the number of packaged chips is greater than or equal to 5, which can control the Vf value and is beneficial for matching the corresponding driver.

[0057] Specifically, the multi-LED composite spectral light-emitting lamp includes at least two types of LEDs, each of which has at most four light-emitting chips, and the light-emitting chips in the same LED can form at least two different emission peaks, wherein each LED emits light simultaneously to form a light emission spectrum that is similar to the solar spectrum.

[0058] It is worth mentioning that the selection of lamps in the multi-lamp composite type spectrum-emitting lamps satisfies the following: in each emission peak formed by all the lamps emitting light simultaneously, the peak interval between two adjacent peaks is greater than or equal to 5nm and less than or equal to 20nm, that is, the peak interval between two adjacent peaks in each emission peak formed by all the lamps is greater than or equal to 5nm and less than or equal to 20nm, so as to ensure the continuity of the spectrum.

[0059] It is understood that each of the aforementioned LED beads emits light together to jointly form the emission spectrum of the multi-LED composite spectrum-based light-emitting lamp. In different modes of the multi-LED composite spectrum-based light-emitting lamp, each of the aforementioned LED beads needs to emit light together to produce an emission spectrum that is close to the solar spectrum.

[0060] It is worth mentioning that, preferably, at most two light-emitting chips are connected in series in each of the lamp beads, so that the Vf value is maintained below 9V, so as to avoid the Vf value being too high, which is beneficial to matching the driving circuit. While reducing the number of chips in the lamp beads, the multi-lamp bead composite spectral light-emitting lamp utilizes the fact that each of the lamp beads has a different emission peak wavelength, and the light-emitting chips in each of the lamp beads have different emission peak wavelengths, to meet the corresponding spectral peak settings. The lamp beads emit light together to form a light emission spectrum that approximates the solar spectrum, thus avoiding the use of multiple quantum well chips and ensuring the stability of the light emission spectrum.

[0061] Preferably, the chip in each of the lamp beads has at most two peaks in its emission spectrum. That is, the light-emitting chip in the same lamp bead can and can only form two different emission peaks. The multi-lamp bead composite spectrum-based light-emitting lamp avoids the use of multi-quantum-well chips to prevent changes in the emission spectrum when the driving current changes. At the same time, the multi-lamp bead composite spectrum-based light-emitting lamp has an emission spectrum that is close to the solar spectrum based on the composite emission of multiple lamp beads.

[0062] For details, please refer to the accompanying drawings in the specification of this utility model. Figures 3A to 5C The first embodiment of this utility model illustrates the emission spectra of the selected LEDs in the multi-LED composite spectrum-based light-emitting lamp and the comparison between the emission spectrum of the multi-LED composite spectrum-based light-emitting lamp and the solar spectrum. In the first embodiment, the multi-LED composite spectrum-based light-emitting lamp uses four light-emitting chips with emission peak wavelengths of 433nm, 445nm, 457nm, and 470nm within an error range of ±2.5nm. The four light-emitting chips are paired up and belong to two different types of LEDs. Each type of LED has two light-emitting chips with different emission peak wavelengths, and the corresponding emission spectra of the two types of LEDs are different. The two types of LEDs emit light together to synthesize an emission spectrum similar to the solar spectrum, thus reducing the number of LEDs while avoiding an excessive number of chips in a single LED.

[0063] It is worth mentioning that the limitation that the peak interval between two adjacent peaks in the emission peaks formed by all the lamp beads is greater than or equal to 5nm and less than or equal to 20nm is not limited to the peak interval between two adjacent peaks in the emission peaks of a single lamp bead being less than or equal to 20nm. That is to say, in the four light-emitting chips selected in the first embodiment, it is not limited that two light-emitting chips with similar wavelengths must be packaged in the same lamp bead. The light-emitting chips can also be packaged in pairs in an alternating manner. For example, the light-emitting chips with emission peak wavelengths of 433nm and 457nm are packaged in the same lamp bead, and the light-emitting chips with emission peak wavelengths of 445nm and 470nm are packaged in the same lamp bead. When the two lamp beads emit light at the same time, the emission peaks formed together also satisfy the condition that the peak interval between two adjacent peaks is greater than or equal to 5nm and less than or equal to 20nm. In other words, in the same LED, the emission peaks formed must satisfy that the peak interval between two adjacent peaks is greater than or equal to 5 nm. In particular, the emission peaks formed in the same LED are further restricted to satisfy that the peak interval between two adjacent peaks is less than or equal to 80 nm, which helps to ensure the spectral continuity of the simultaneous emission of each LED.

[0064] Preferably, in the first embodiment of this utility model, two light-emitting chips with emission peak wavelengths of 433nm and 457nm are connected in series and encapsulated in the same type of lamp bead, respectively labeled as lamp bead A; two light-emitting chips with emission peak wavelengths of 445nm and 470nm are connected in series and encapsulated in the same type of lamp bead, respectively labeled as lamp bead B, to facilitate the excitation of the corresponding wavelength conversion material by each lamp bead. The light-emitting chips in the same lamp bead are connected in series to ensure spectral stability.

[0065] It is worth mentioning that each of the lamp beads A and B contains two light-emitting chips, and the Vf value of the lamp beads A and B is approximately 6V, which is beneficial for matching the corresponding driving circuit.

[0066] Furthermore, the multi-LED composite spectral light-emitting lamp further uses a wavelength conversion material to perform wavelength conversion matching on LED A and LED B respectively, so as to obtain a light emission spectrum that approximates the solar spectrum. The wavelength conversion material can be phosphor, quantum dot, quantum rod or nonlinear crystal conversion material. Specifically, in this invention, the wavelength conversion material is phosphor, and the phosphor is encapsulated in LED A and LED B to perform wavelength conversion matching on LED A and LED B respectively.

[0067] Specifically, this invention uses phosphors with emission peak wavelengths of 494nm, 495nm, 535nm, and 655nm to perform wavelength conversion matching on LED bead A and LED bead B, respectively.

[0068] The ratio of phosphor to encapsulating silicone at the corresponding emission peak wavelength is shown in the table below:

[0069]

[0070] A and B are two-component silicone or silicone resin.

[0071] The emission peak wavelength of the phosphor is allowed to fluctuate within a range of ±5nm, and the phosphor ratio is allowed to fluctuate within a range of ±15% based on the values ​​exemplified in the table above. This invention does not limit these aspects.

[0072] Corresponding to Figures 3A to 3C The emission spectrum and color rendering index of the lamp bead A are illustrated, corresponding to... Figures 4A to 4C The emission spectrum and color rendering index of the lamp bead B are illustrated, corresponding to the reference. Figures 5A to 5C The simultaneous emission of LED bead A and LED bead B, synthesizing the emission spectrum and color rendering index of the multi-LED composite spectral luminaire, is illustrated. Figure 5A It can be seen that the emission spectrum of the multi-LED composite spectral-based light-emitting lamp, synthesized by LED A and LED B connected in series, is quite close to the solar spectrum, thus achieving a good full-spectrum lighting effect. Furthermore, compared to… Figure 3C , 4C As can be seen from 5C, 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 95 or above, reflecting high color fidelity.

[0073] Furthermore, referring to the accompanying drawings in the specification of this utility model... Figures 6A to 8C The following illustrations illustrate the emission spectra of the selected LEDs in the multi-LED composite spectrum-based luminous lamp of the second embodiment of this invention, and a comparison between the emission spectrum of the multi-LED composite spectrum-based luminous lamp and the solar spectrum. The adjustment of the emission peak wavelength and / or ratio of the wavelength conversion material allows for adjustments to the luminous effect, such as color temperature. In the second embodiment of this invention, different color temperature luminous effects are obtained by adjusting the emission peak wavelength and ratio of the wavelength conversion material in the first embodiment; the first embodiment corresponds to a color temperature of 3000K, and the second embodiment corresponds to a color temperature of 4000K.

[0074] In the second embodiment, the multi-LED composite spectral luminaire also uses four light-emitting chips with emission peak wavelengths of 433nm, 445nm, 457nm, and 470nm within an error range of ±2.5nm. The four light-emitting chips are also arranged in a structure where they are connected in pairs within the LED beads.

[0075] Among them, the two light-emitting chips with emission peak wavelengths of 433nm and 457nm are connected in series and sealed in the same lamp bead, which is marked as lamp bead A, and the two light-emitting chips with emission peak wavelengths of 445nm and 470nm are connected in series and sealed in the same lamp bead, which is marked as lamp bead B.

[0076] Specifically, in the second embodiment, phosphors with emission peak wavelengths of 494nm, 495nm, 535nm, 525nm and 655nm are selected to perform wavelength conversion matching on the lamp bead A and the lamp bead B respectively.

[0077] The ratio of phosphor to encapsulating silicone at the corresponding emission peak wavelength is shown in the table below:

[0078]

[0079] A and B are two-component silicone or silicone resin.

[0080] The emission peak wavelength of the phosphor is allowed to fluctuate within a range of ±5nm, and the phosphor ratio is allowed to fluctuate within a range of ±15% based on the values ​​exemplified in the table above. This invention does not limit these aspects.

[0081] Corresponding to Figures 6A to 6C The emission spectrum and color rendering index of the lamp bead A are illustrated, corresponding to... Figures 7A to 7C The emission spectrum and color rendering index of the lamp bead B are illustrated, corresponding to the reference. Figures 8A to 8C The emission spectrum and color rendering index of the multi-LED composite spectral luminaire are illustrated by the simultaneous emission of LED beads A and B connected in series, which together synthesize the light emission spectrum and color rendering index of the multi-LED composite spectral luminaire. Figure 8A It can be seen that the emission spectrum of the multi-LED composite spectral-based luminous lamp, synthesized by LED A and LED B, is quite close to the solar spectrum, thus achieving a good full-spectrum lighting effect. Furthermore, compared to… Figure 6C , 7C As can be seen from 8C, 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 95 or above, reflecting high color fidelity.

[0082] Further reference is made to the accompanying drawings in the specification of this utility model. Figures 9A to 12FIn the third and fourth embodiments of this utility model, the light-emitting chip is selected as a dual quantum well chip with two peaks in the corresponding emission spectrum. Each of the two types of lamp beads has at most two dual quantum well chips, so as to reduce the number of chips in each lamp bead while satisfying the corresponding spectral peak settings, so that the Vf value of the lamp bead is controlled at 6V or below, which is beneficial to reduce the Vf value and facilitates matching the driving circuit.

[0083] Preferably, in the third and fourth embodiments of this invention, each of the two types of LED beads has one and only one dual quantum well chip, so that the Vf value of the LED bead is maintained at around 3V, which helps to reduce the Vf value and can be matched with a common driving circuit.

[0084] It is worth mentioning that the peak interval between the two peaks of the dual quantum well chip selected in this invention is less than or equal to 20nm, which can ensure the stability of the emission spectrum under different driving currents and ensure the corresponding lighting effect.

[0085] In particular, the peak interval between the two peaks of the dual quantum well chip selected in this invention is greater than or equal to 8nm, which helps to ensure the spectral continuity of each lamp bead and effectively reduce gaps and spikes in the spectrum.

[0086] Specifically, the two peaks of the dual quantum well chip are defined as the first peak and the second peak. Corresponding to the third embodiment of this utility model, in one type of lamp bead, the emission peak wavelength of the first peak of the dual quantum well chip is 435nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak is 445nm within an error range of ±2.5nm. This is labeled as lamp bead A. In another type of lamp bead, the emission peak wavelength of the first peak of the dual quantum well chip is 457nm within an error range of ±2.5nm, and the emission peak wavelength of the second peak is 470nm within an error range of ±2.5nm. This is labeled as lamp bead B. This effectively ensures the continuity and stability of the emission spectrum synthesized when the two lamp beads emit light simultaneously.

[0087] Furthermore, the multi-LED composite spectral luminaire is further encapsulated with wavelength conversion materials in LED A and LED B respectively, so as to perform wavelength conversion matching on LED A and LED B respectively, so as to obtain a luminous spectrum that approximates the solar spectrum.

[0088] Specifically, this invention uses phosphors with emission peak wavelengths of 494nm, 535nm, 495nm, 655nm, 733nm, 795nm, 821nm, 605nm, and 525nm to perform wavelength conversion matching on the chip.

[0089] The ratio of phosphor to encapsulating silicone at the corresponding emission peak wavelength is shown in the table below:

[0090]

[0091] A and B are two-component silicone or silicone resin.

[0092] The emission peak wavelength of the phosphor is allowed to fluctuate within a range of ±5nm, and the phosphor ratio is allowed to fluctuate within a range of ±15% based on the values ​​exemplified in the table above. This invention does not limit these aspects.

[0093] Corresponding to Figures 9A to 9C The emission spectrum and color rendering index of the lamp bead A are illustrated, corresponding to... Figures 10A to 10C The emission spectrum and color rendering index of the lamp bead B are illustrated, corresponding to the reference. Figures 11A to 11C The simultaneous emission of LED bead A and LED bead B, synthesizing the emission spectrum and color rendering index of the multi-LED composite spectral luminaire, is illustrated. Figure 11A It can be seen that the emission spectrum of the multi-LED composite spectral luminaire, synthesized by LED A and LED B connected in series, is quite close to the solar spectrum, thus achieving a good full-spectrum lighting effect. Furthermore, compared to… Figure 9C , 10C As can be seen from 11C, 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 high level, reflecting high color fidelity.

[0094] It is worth mentioning that, based on the use of two aforementioned LED chips, further LED chips can be selected to make the corresponding synthetic emission spectrum even closer to the solar spectrum. Specifically, refer to... Figures 12A to 12D As shown, the multi-LED composite spectral luminaire further includes another LED with a different emission peak wavelength than the two LEDs in the wavelength range of 300nm-500nm, thereby obtaining a luminescence spectrum that approaches the solar spectrum based on the simultaneous emission of multiple LEDs.

[0095] In the fourth embodiment of this utility model, all three types of LED beads use dual quantum well chips, and there is one and only one dual quantum well chip. The two peaks of the dual quantum well chip are defined as the first peak and the second peak. Corresponding to the fourth embodiment of this utility model, the dual quantum well chips of the three types of LED beads are dual quantum well chips with a first peak emission wavelength of 405nm within an error range of ±2.5nm and a second peak emission wavelength of 420nm within an error range of ±2.5nm. The LED bead containing this dual quantum well chip is denoted as LED bead A. A dual quantum well chip with a peak emission wavelength of 442nm within an error range of ±2.5nm and a peak emission wavelength of 455nm within an error range of ±2.5nm is designated as LED chip B; a dual quantum well chip with a peak emission wavelength of 468nm within an error range of ±2.5nm and a peak emission wavelength of 480nm within an error range of ±2.5nm is designated as LED chip C, is used to synthesize a light emission spectrum that is closer to the solar spectrum.

[0096] Corresponding to Figure 12A The emission spectrum of the lamp bead A is illustrated, corresponding to... Figure 12B The emission spectrum of the lamp bead B is illustrated, corresponding to... Figure 12C The corresponding emission spectrum of the lamp bead C is illustrated.

[0097] Furthermore, the multi-LED composite spectral light-emitting lamp is further encapsulated with wavelength conversion materials in LED A, LED B, and LED C respectively, so as to perform wavelength conversion matching on LED A, LED B, and LED C respectively, so as to obtain a light emission spectrum that approximates the solar spectrum.

[0098] Specifically, this invention uses phosphors with emission peak wavelengths of 494nm, 535nm, 495nm, 655nm, 733nm, 795nm, 821nm, 605nm, and 525nm to perform wavelength conversion matching on the chip.

[0099] The ratio of phosphor to encapsulating silicone at the corresponding emission peak wavelength is shown in the table below:

[0100]

[0101] A and B are two-component silicone or silicone resin.

[0102] The emission peak wavelength of the phosphor is allowed to fluctuate within a range of ±5nm, and the phosphor ratio is allowed to fluctuate within a range of ±15% based on the values ​​exemplified in the table above. This invention does not limit these aspects.

[0103] Corresponding reference Figure 12D After being encapsulated with the wavelength conversion material, LED beads A, B, and C emit light simultaneously to synthesize the emission spectrum of the multi-LED composite spectral luminaire. Figure 12D It can be seen that the emission spectrum of the multi-LED composite spectral luminous lamp, which is synthesized by LED A, LED B and LED C, is very close to the solar spectrum, and can form a good full-spectrum lighting effect.

[0104] Specifically, to further match the solar spectrum in the 380nm-400nm band, based on the fourth embodiment, the multi-LED composite spectral-based light-emitting lamp further includes a single-peak LED with a different emission peak wavelength than the three types of LEDs mentioned above in the 300nm-500nm band. This single-peak LED has only one light-emitting chip with an emission peak wavelength of 380nm within an error range of ±2.5nm. In some embodiments, an LED with only one dual-quantum-well chip can also be selected. The peak spacing of the dual-quantum-well chips in this LED is greater than or equal to 5nm and less than or equal to 10nm, and the emission peak wavelength is in the 380nm to 431nm band.

[0105] For details, please refer to the following: Figure 12E The corresponding emission spectrum of the single-peak lamp bead is illustrated.

[0106] Corresponding reference Figure 12F The single-peak lamp bead, lamp bead A, lamp bead B, and lamp bead C are connected in series after being encapsulated with the wavelength conversion material, emitting light simultaneously to synthesize the emission spectrum of the multi-lamp bead composite type spectrum-based luminous lamp. Figure 12F It can be seen that, by comparing the emission spectrum of the multi-LED composite spectral light-emitting lamp synthesized by the simultaneous emission of the single-peak LED, LED A, LED B, and LED C with the solar spectrum, the emission spectrum of the multi-LED composite spectral light-emitting lamp is closer to that of the solar spectrum.

[0107] It is worth mentioning that, in the various embodiments of this utility model, specific comparisons are made. Figure 3C , 4C And 5C, Figure 6C , 7C And 8C, Figure 9C , 10CAnd 11C, the light quality evaluation index when all the said lamps emit light together is better than that of a single said lamp, the evaluation index includes but is not limited to CRI Ra, the average value of CRI R1-R15 and Rf, etc.

[0108] To further understand this utility model, it also provides a multi-LED composite spectral emission method, wherein LEDs with an emission peak difference of ≥5nm within the 300nm-500nm wavelength range are defined as different types of LEDs. The multi-LED composite spectral emission method includes the following steps:

[0109] A. At least two types of LED beads are selected, wherein each type of LED bead has at most four light-emitting chips, and the light-emitting chips in the same LED bead can form at least two different emission peaks;

[0110] B. All the lamp beads are lit together, 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, and the corresponding emission spectrum synthesized by the simultaneous emission of the lamp beads is the emission spectrum formed by the multi-lamp bead synthesis type spectrum emission method.

[0111] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0112] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

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

2. The multi-LED composite spectral light-emitting lamp according to claim 1, wherein the LEDs are selected from dual quantum well chips with two peaks in the corresponding emission spectrum, each LED has at most two dual quantum well chips, wherein the peak interval between the two peaks of each dual quantum well chip is greater than or equal to 8nm and less than or equal to 20nm.

3. The multi-LED composite spectral luminaire according to claim 2, wherein the two peaks of the dual quantum well chip are defined as the first peak and the second peak, wherein the emission peak wavelength of the first peak of the dual 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 is 445nm within an error range of ±2.5nm; and the emission peak wavelength of the first peak of the dual 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 is 470nm within an error range of ±2.5nm.

4. The multi-LED composite spectrum-based light-emitting lamp according to claim 2, wherein the multi-LED composite spectrum-based light-emitting lamp further includes another LED with a different emission peak wavelength than the two types of LEDs in the wavelength range of 300nm-500nm, the other LED also using a dual quantum well chip, and having only one dual quantum well chip, wherein the dual quantum well chips of the three types of LEDs are respectively a dual quantum well chip with an emission peak wavelength of 405nm within an error range of ±2.5nm for the first peak wavelength and 420nm within an error range of ±2.5nm for the second peak wavelength, a dual quantum well chip with an emission peak wavelength of 442nm within an error range of ±2.5nm for the first peak wavelength and 455nm within an error range of ±2.5nm for the second peak wavelength, and a dual quantum well chip with an emission peak wavelength of 468nm within an error range of ±2.5nm for the first peak wavelength and 480nm within an error range of ±2.5nm for the second peak wavelength.

5. The multi-LED composite spectrum-based light-emitting lamp according to claim 4, wherein the multi-LED composite spectrum-based light-emitting lamp further includes a single-peak LED with a different emission peak wavelength than the three types of LEDs in the wavelength range of 300nm-500nm, and the single-peak LED has only one light-emitting chip with an emission peak wavelength of 380nm within an error range of ±2.5nm.

6. The multi-LED composite spectral luminaire according to any one of claims 3 to 5, wherein 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 perform wavelength conversion matching on each of the LEDs.

7. The multi-LED composite spectrum-based light-emitting lamp according to claim 1, wherein the multi-LED composite spectrum-based light-emitting lamp comprises four light-emitting chips with emission peak wavelengths of 433nm, 445nm, 457nm and 470nm within an error range of ±2.5nm, the four light-emitting chips being assigned to two different types of LEDs, each type of LED having two light-emitting chips with different emission peak wavelengths, wherein the two light-emitting chips of the same LED are connected in series.

8. The multi-LED composite spectral light-emitting lamp according to claim 7, wherein the two light-emitting chips with emission peak wavelengths of 433nm and 457nm belong to the same LED, and the two light-emitting chips with emission peak wavelengths of 445nm and 470nm belong to the same LED.

9. The multi-LED composite spectral luminaire according to claim 8, wherein wavelength conversion materials with emission peak wavelengths of 494nm±5nm, 495nm±5nm, 535nm±5nm, and 655nm±5nm are used to perform wavelength conversion matching on each of the LEDs.

10. The multi-LED composite spectral luminaire according to claim 8, wherein wavelength conversion materials with emission peak wavelengths of 494nm±5nm, 495nm±5nm, 535nm±5nm, 525nm±5nm and 655nm±5nm are used to perform wavelength conversion matching on each of the LEDs.

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