Double light sources and light source module thereof

Abstract

The invention discloses a dual light source which is composed of a light source A and a light source B. The light source A comprises a chip A1, a chip A2 and a wavelength, the size of the chip A1 corresponding to the chip A1 is 12 micrometers * 36 micrometers, the wavelength of the chip A1 is 435 nm to 440 nm, the size of the chip A2 corresponding to the chip A2 is 10 micrometers * 29 micrometers, the wavelength of the chip A2 is 452.5 nm to 455 nm, the light source B comprises a chip B1 and a chip B2 and a wavelength, the size of the chip B1 corresponding to the chip B1 is 15 micrometers * 30 micrometers, the wavelength of the chip B1 is 450 nm to 452.5 nm, and the size of the chip B2 corresponding to the chip B2 is 15 micrometers * 30 micrometers. The size of a chip corresponding to B2 is 15 [mu] m * 30 [mu] m, the wavelength of B2 is 465 nm to 472.5 nm, and A1, A2, B1 and B2 are blue light chips. The light source module with the double light sources comprises the light source A and the light source B, and further comprises a substrate. The light source module is reasonable in structural design, a full-spectrum effect is achieved by using a plurality of light sources with different spectrums according to a certain proportion based on the spectrum superposition principle, a certain price advantage is achieved under the conditions that the color rendering index and the current application range are improved, and the chip utilization rate is improved, the light source chip can be well protected by the light source module, and the service life of the light source module is prolonged. The service life is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting light sources, and in particular to a dual light source and a light source module thereof. Background Art

[0002] Full spectrum refers to the spectrum curve that includes ultraviolet light, visible light, and infrared light, and the ratio of red, green, and blue in the visible light part is similar to that of sunlight, and the color rendering index is close to 100. It can accurately present the color of objects, so that the color of objects seen under light is almost the same as that under natural light, reducing color distortion. And because the spectrum is close to natural light, it is less irritating to the eyes and can effectively relieve eye fatigue. It is not easy to experience dry eyes, soreness, and other discomfort symptoms when in a full-spectrum lighting environment for a long time.

[0003] With the advancement of science and technology and the improvement of people's quality of life, family health has also attracted everyone's attention. Light health is one of them, and children's myopia is of utmost importance. Traditional light sources have defects in color rendering index, spectrum, blue light, etc. Although the full spectrum of three blue lights and four blue lights has good spectral continuity, the chip utilization rate is extremely low, resulting in high prices. The dual blue light full spectrum has spectral imbalance, which may cause the color restoration of objects to be not realistic enough and reduce the color rendering index. For this reason, we proposed a dual light source and its light source module to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a dual light source and a light source module thereof, which utilizes the principle of spectral superposition to use multiple light sources with different spectra in a certain proportion to achieve a full spectrum effect, improve the display index and current application range, and improve the chip utilization rate while having certain price advantages. In addition, the light source module can provide good protection for the light source chip and ensure its service life.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A dual light source, the dual light source consists of an A light source and a B light source, the A light source includes two chips A1 and A2 and a wavelength, the chip size corresponding to A1 is 12μm*36μm, the wavelength is 435nm-440nm, the chip size corresponding to A2 is 10μm*29μm, the wavelength is 452.5nm-455nm, the B light source includes two chips B1 and B2 and a wavelength, the chip size corresponding to B1 is 15μm*30μm, the wavelength is 450nm-452.5nm, the chip size corresponding to B2 is 15μm*30μm, the wavelength is 465nm-472.5nm, and A1, A2, B1, and B2 are all blue light chips.

[0007] A light source module with dual light sources includes the above-mentioned A light source and B light source, and also includes a substrate, the surface of the substrate has electrode solder joints, a plurality of A light source lamp beads and B light source lamp beads formed by the A light source and B light source package are evenly arranged on the substrate, and the electrode solder joints on the surface of the substrate are connected by solid crystal solder paste, and a first electrode and a second electrode are provided on the substrate for connecting to an external power supply.

[0008] Preferably, the substrate includes a base layer, a thermally conductive insulation layer, a circuit copper layer and a pad layer, the thermally conductive insulation layer is arranged on the base layer, the circuit copper layer is arranged on the thermally conductive insulation layer, the pad layer is connected to the circuit copper layer, the A light source lamp beads and the B light source lamp beads are arranged on the pad layer, the first electrode and the second electrode are connected to the circuit copper layer, the four corners of the substrate are all provided with mounting holes, and the four side walls of the substrate are all provided with positioning recesses.

[0009] Preferably, the A light source lamp bead and the B light source lamp bead both include a bracket, two accommodating cavities are formed on the bracket, the two light source chips of the A light source or the B light source are respectively placed in the two accommodating cavities, the bottom of the bracket is provided with electrode pins for electrically connecting the light source chip and the outside, the electrode pins are connected to the electrode solder points of the pad layer through solid crystal solder paste, the accommodating cavities are filled with a packaging body, the packaging body is provided with a fluorescent body, a silicone cover is pressed on the outer side of the bracket, and the substrate is provided with protrusions that are respectively fitted with the four side walls of the silicone cover.

[0010] Preferably, the bracket is made of any one of PPA (plastic), PCT (ceramic), and EMC (ceramic).

[0011] Preferably, the packaging body is made of at least one of a silicon-based resin and an epoxy resin, and the packaging body fills the two accommodating cavities and covers the two light source chips of the corresponding A light source or B light source.

[0012] Preferably, the phosphor is a blue light excited phosphor, and the blue light excited phosphor is spread on the surface of the package by dispensing or hot pressing.

[0013] Preferably, in the light source module, the number of lamp bead strings is 10, 12, 14 and 16, and the corresponding ratios of A and B light sources are 6:4, 7:5, 8:6 and 9:7 respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This dual light source and its light source module use the principle of spectral superposition to use multiple light sources with different spectra in a certain proportion to achieve a full spectrum effect, improve the CRI, current application range, and improve chip utilization, with certain price advantages.

[0016] 2. In the dual light source and its light source module, the light source chip is placed in the bracket and filled with the packaging body. The packaging body can prevent the light source chip from being physically damaged by the outside world, and can achieve good electrical isolation between the light source chip and the external environment, reduce the impact of external electromagnetic interference on the operation of the light source chip, and also prevent the signal leakage inside the light source chip, interfere with other circuits, and help the light source chip to dissipate heat. The setting of the phosphor can achieve a full-spectrum effect and meet the needs of the lighting environment. The silicone cover shell cooperates with the protrusion to increase the irradiation range of the light and further protect the light source chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the top view of the structure of a light source module with dual light sources proposed by the present invention;

[0018] Figure 2 A schematic cross-sectional structure diagram of a light source module with dual light sources proposed by the present invention;

[0019] Figure 3 A schematic diagram of the light source arrangement of a dual-light source light source module proposed by the present invention;

[0020] Figure 4 A schematic diagram of the spectrum of a dual light source and a light source module thereof proposed by the present invention.

[0021] In the figure: 1. substrate; 101. base layer; 102. thermal conductive insulation layer; 103. circuit copper layer; 104. pad layer; 105. mounting hole; 106. notch; 2. A light source lamp bead; 3. B light source lamp bead; 4. first electrode; 5. second electrode; 6. bracket; 7. light source chip; 8. electrode pin; 9. package body; 10. phosphor; 11. silicone cover; 12. protrusion. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-Figure 4A dual light source, the dual light source consists of a light source A and a light source B, the light source A includes two chips A1 and A2 and wavelengths, the chip size corresponding to A1 is 12μm*36μm, the wavelength is 435nm-440nm, the chip size corresponding to A2 is 10μm*29μm, the wavelength is 452.5nm-455nm, the light source B includes two chips B1 and B2 and wavelengths, the chip size corresponding to B1 is 15μm*30μm, the wavelength is 450nm-452.5nm, the chip size corresponding to B2 is 15μm*30μm, the wavelength is 465nm-472.5nm, A1, A2, B1, B2 are all blue light chips, and the spectrum continuity is improved by using two light sources and 4 chips. Although the full spectrum of three blue lights and four blue lights has good spectral continuity, the chip utilization rate is extremely low, resulting in high prices. The dual blue light full spectrum also has shortcomings. The use of this technical solution can be compatible with the advantages of good spectral continuity of the full spectrum of three blue lights and four blue lights and the low price of the dual blue light full spectrum. While improving the chip utilization rate, the price is still the price of a dual blue light source, which is cost-effective.

[0024] A light source module for a dual light source comprises the above-mentioned A light source and B light source, and also comprises a substrate 1, wherein the substrate 1 comprises a base layer 101, a heat conductive insulation layer 102, a circuit copper layer 103 and a pad layer 104, wherein the heat conductive insulation layer 102 is arranged on the base layer 101, the circuit copper layer 103 is arranged on the heat conductive insulation layer 102, the pad layer 104 is connected to the circuit copper layer 103, the A light source lamp beads 2 and the B light source lamp beads 3 are arranged on the pad layer 104, the first electrode 4 and the second electrode 5 are connected to the circuit copper layer 103, the four corners of the substrate 1 are penetrated with mounting holes 105, the arrangement of the mounting holes 105 facilitates the installation of the substrate 1 in a lamp housing, and the four side walls of the substrate 1 are arranged with positioning recesses 106, the arrangement of the positioning recesses 106 facilitates the positioning when the substrate 1 is installed in the lamp housing, and the operation is simple.

[0025] The substrate 1 has electrode solder joints on its surface. Several A light source lamp beads 2 and B light source lamp beads 3 formed by the A light source and B light source packages are evenly arranged on the substrate 1 and connected to the electrode solder joints on the surface of the substrate 1 through solid crystal solder paste. The A light source lamp beads 2 and B light source lamp beads 3 both include a bracket 6. The bracket 6 is made of any one of PPA (plastic), PCT (ceramic), and EMC (ceramic). Two accommodating cavities are formed on the bracket 6. The two light source chips 7 of the A light source or B light source are placed in the two accommodating cavities respectively. The bottom of the bracket 6 is provided with electrode pins 8 for electrically connecting the light source chip 7 to the outside. The electrode pins 8 are connected to the electrode solder joints of the pad layer 104 through solid crystal solder paste. Solid crystal solder paste is a paste-like mixture containing metal powders such as tin and flux. When performing the welding operation, the electrode pins 8 of the light source chip 7 are placed at the corresponding position of the substrate 1 coated with solid crystal solder paste. The metal powder in the solder paste is melted by heating. During the melting process, the flux removes oxides on the welding surface, reduces surface tension, and enables the molten metal to better infiltrate the metal surfaces of the electrode pins 8 and the substrate 1, and forms a firm metal connection after cooling. It can provide a good electrical connection, ensure the stability and reliability of signal transmission between the light source chip 7 and the substrate 1, and has high precision.

[0026] The accommodating cavity is filled with a packaging body 9, and the packaging body 9 is made of at least one of a silicone-based resin and an epoxy resin. The packaging body 9 is filled into the two accommodating cavities and covers the two light source chips 7 of the corresponding A light source or B light source. The packaging body 9 can prevent the light source chip 7 from being physically damaged by the outside world, such as being damaged by collision, vibration, dust, moisture and other factors. For example, the light source chip 7 can be protected from damage when the device falls or is slightly bumped, and the packaging body 9 can achieve good electrical isolation between the light source chip 7 and the external environment, reduce the influence of external electromagnetic interference on the operation of the light source chip 7, and also prevent the signal leakage inside the light source chip 7 from interfering with other circuits. At the same time, it helps the light source chip 7 to dissipate heat, conduct away the heat generated when the light source chip 7 is working, and avoid the light source chip 7 from being degraded or even damaged due to overheating.

[0027] The package 9 is provided with a phosphor 10, which is a blue light-excited phosphor. The blue light-excited phosphor is spread on the surface of the package 9 by dispensing or hot pressing. Phosphor is a material that can absorb light of a specific wavelength and then emit light of a different wavelength. When blue light is used to excite the phosphor, the phosphor absorbs the energy of the blue light, and the electrons inside it will transition from the ground state to the excited state. Subsequently, in the process of returning to the ground state, the electrons will release excess energy in the form of light, emitting light with a longer wavelength than the blue light, usually green light, yellow light, etc. Since A1, A2, B1, and B2 are all blue light chips, the blue light emitted by the blue light chip excites the yellow phosphor, and the blue light and the yellow light emitted by the phosphor can be mixed to produce white light. In lighting applications, by reasonably selecting the intensity of the phosphor and the blue light, white light with different color temperatures can be produced to meet the needs of various lighting environments, such as warm white light for home lighting, cold white light for office lighting, etc. Since the light source is composed of two full-spectrum light sources, it has optimized the problem that the full spectrum of blue light excitation can only be applied under specified current. Its application range can be greatly increased. For example, a 3V0.5W150mA light source can be 3V0.2W60mA under this technology, and the spectrum is also within a stable range.

[0028] A silicone cover shell 11 is pressed on the outer side of the bracket 6, wherein colored or transparent fluorescent powder can also be added into the silicone cover shell 11, which has many light-emitting surfaces and high light efficiency, and can increase the irradiation range of light. The silicone cover shell 11 can also protect the bracket 6 and the light source chip 7 therein. The substrate 1 is provided with protrusions 12 which are respectively fitted with the four side walls of the silicone cover shell 11. The protrusions 12 can protect the silicone cover shell 11 on all sides to avoid shaking and ensure its stability, thereby ensuring the stability of the bracket 6, so that the light source chip 7 can be stably installed on the substrate 1, reducing the risk of shaking and falling off. When the two light source chips 7 of light source A or light source B are respectively placed in the corresponding accommodating cavities on the bracket 6, electrical connection is achieved with the outside through the electrode pins 8. The accommodating cavity is first filled with the packaging body 9 to fix the light source chip 7 in the accommodating cavity, and then the phosphor 10 is spread on the packaging body 9 by dispensing or hot pressing. The silicone cover shell 11 is then put on the bracket 6 to protect the bracket 6, and the protrusions 12 that fit the surrounding side walls of the silicone cover shell 11 are welded on the surface of the substrate 1 to further fix and protect the bracket 6, which can ensure the stability of the connection between the bracket 6 and the light source chip 7.

[0029] The substrate 1 is provided with a first electrode 4 and a second electrode 5 for connecting to an external power source. The substrate electrodes play a key role in electronic devices. They are mainly used to achieve circuit connection and signal transmission. They can connect each light source chip 7 to a driving power source to ensure that current can flow between different components, so that the entire circuit can work normally and the light source chip 7 can emit light. The first electrode 4 and the second electrode 5 are respectively the positive electrode and the negative electrode, and are made of metal materials.

[0030] Since there are two types of light sources and the chip bands are different, there is a problem of different voltages. This application solves this problem through a series circuit. Because the voltage of each parallel is stable under the series constant current condition, the output voltage of household lamps is generally 24V / 36V / 48V, so this technology matches the following number of strings and ratios. The number of lamp beads in the string is 10 strings, 12 strings, 14 strings and 16 strings, and the corresponding ratios of A and B light sources are 6:4, 7:5, 8:6 and 9:7 respectively. At these ratios, the spectrum tends to be stable.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dual light source, characterized in that: The dual light source consists of a light source A and a light source B. The light source A includes two chips A1 and A2 and wavelengths. The chip size corresponding to A1 is 12μm*36μm, and the wavelength is 435nm-440nm. The chip size corresponding to A2 is 10μm*29μm, and the wavelength is 452.5nm-455nm. The light source B includes two chips B1 and B2 and wavelengths. The chip size corresponding to B1 is 15μm*30μm, and the wavelength is 450nm-452.5nm. The chip size corresponding to B2 is 15μm*30μm and the wavelength is 465nm-472.5nm. A1, A2, B1, and B2 are all blue light chips.

2. A dual-light source light source module, comprising the light source A and the light source B as claimed in claim 1, characterized in that: It also comprises a substrate (1), the surface of the substrate (1) having electrode solder joints, a plurality of A light source lamp beads (2) and B light source lamp beads (3) formed by the A light source and B light source packaging are evenly arranged on the substrate (1), and the electrode solder joints on the surface of the substrate (1) are connected by solid crystal solder paste, and a first electrode (4) and a second electrode (5) are arranged on the substrate (1) for connecting to an external power supply.

3. A dual-light source light source module according to claim 2, characterized in that: The substrate (1) comprises a base layer (101), a heat-conducting insulating layer (102), a circuit copper layer (103) and a pad layer (104); the heat-conducting insulating layer (102) is arranged on the base layer (101); the circuit copper layer (103) is arranged on the heat-conducting insulating layer (102); the pad layer (104) is connected to the circuit copper layer (103); the A light source lamp bead (2) and the B light source lamp bead (3) are arranged on the pad layer (104); the first electrode (4) and the second electrode (5) are connected to the circuit copper layer (103); the four corners of the substrate (1) are all provided with mounting holes (105); and the four side walls of the substrate (1) are all provided with positioning notches (106).

4. The light source module with dual light sources according to claim 2, characterized in that: The A light source lamp bead (2) and the B light source lamp bead (3) both include a bracket (6), the bracket (6) is formed with two accommodating cavities, the two light source chips (7) of the A light source or the B light source are respectively placed in the two accommodating cavities, the bottom of the bracket (6) is provided with an electrode pin (8) for electrically connecting the light source chip (7) and the outside, the electrode pin (8) is connected to the electrode solder point of the pad layer (104) through a solid crystal solder paste, the accommodating cavity is filled with a packaging body (9), the packaging body (9) is provided with a fluorescent body (10), the outer side of the bracket (6) is pressed with a silicone cover shell (11), and the substrate (1) is provided with protrusions (12) respectively fitted with the four side walls of the silicone cover shell (11).

5. The dual-light source light source module according to claim 2, characterized in that: The support (6) is made of any one of PPA, PCT and EMC.

6. The dual-light source light source module according to claim 2, characterized in that: The packaging body (9) is made of at least one of a silicon-based resin and an epoxy resin, and the packaging body (9) fills the two accommodating cavities and covers the two light source chips (7) of the corresponding A light source or B light source.

7. The dual-light source light source module according to claim 2, characterized in that: The phosphor (10) is a blue light excited phosphor powder, which is spread on the surface of the package (9) by dispensing or hot pressing.

8. The dual-light source light source module according to claim 2, characterized in that: In the light source module, the number of lamp bead strings is 10, 12, 14 and 16, and the corresponding ratios of A and B light sources are 6:4, 7:5, 8:6 and 9:7 respectively.

Images