Light source device and light emitting apparatus

Abstract

The application discloses a light source device and a light-emitting device. The light source device comprises a first LED module and a second LED module. The first LED module comprises a circular first light-emitting chip and a wavelength conversion layer. The wavelength conversion layer is arranged on a light-emitting surface of the first light-emitting chip and generates red light by being excited by light of the first light-emitting chip. The light-emitting surface of the first light-emitting chip is circular. The second LED module comprises a second light-emitting chip. The light-emitting surface of the second light-emitting chip is circular. The second light-emitting chip is used for emitting a first light beam. A light combination module is arranged on the light paths of the red light and the first light beam and is used for combining and emitting the red light and the first light beam. The light-emitting device comprises a shell and the above light source device. The light source device is arranged in the shell. The light source device has a good uniform light effect on the combined red light and first light beam.

Description

Technical Field

[0001] This application relates to the field of optical lighting technology, and more specifically, to a light source device and a light-emitting device. Background Technology

[0002] With the development of semiconductor technology, LED (Light Emitting Diode) light sources are gradually replacing traditional incandescent lamps and energy-saving lamps, becoming a universal lighting source due to their many advantages such as high luminous flux, long lifespan, small structure, safety, high efficiency, and energy saving.

[0003] One method to achieve white light from LEDs is to use a combination of red, green, and blue primary color LED chips to form mixed light emission. This method combines red, green, and blue LED chips together, and mixes the light of each color in a certain proportion to form white light. Therefore, the color and brightness of the white light can be controlled according to requirements.

[0004] However, in this approach, due to limitations in the manufacturing process of LED chips in traditional technology, the conventional shape of red LED chips is square, while the conventional shape of blue and green LED chips is circular. This results in a mismatch between the divergence angle and spot shape of the red LED chip and the blue and green LED chips, leading to poor beam performance, color differences, and inconsistent light distribution. For example, the difference in the light emission angles of the three-color LEDs mentioned above causes "rainbow rings," and red, blue, or green spots appear in the illuminated area, resulting in uneven light mixing and poor white light illumination. Utility Model Content

[0005] This application provides a light source device and a light-emitting device.

[0006] According to a first aspect of this application, an embodiment of this application provides a light source device, including a first LED module, comprising a first light-emitting chip and a wavelength conversion layer, the wavelength conversion layer being disposed on the light-emitting surface of the first light-emitting chip and generating red light by being excited by the light from the first light-emitting chip, wherein the light-emitting surface of the first LED module is circular; a second LED module, comprising a second light-emitting chip, the light-emitting surface of the second light-emitting chip being circular, the second light-emitting chip being used to emit a first light beam; and a light combining module, disposed in the optical path of the red light and the first light beam, for combining the red light and the first light beam for emission.

[0007] In some optional embodiments, the light source device further includes a third LED module for emitting a second beam, the third LED module including a third light-emitting chip, the light-emitting surface of the third light-emitting chip being circular; a light-combining module is also disposed in the optical path of the second beam and is used to combine the red light, the first beam and the second beam to form the emitted light.

[0008] In some optional embodiments, the divergence angle of the red light is consistent with the divergence angle of the first beam and the divergence angle of the second beam.

[0009] In some optional embodiments, the first LED module includes a first light-emitting chip that is a circular LED wafer, and the wavelength conversion layer covers the entire surface of the first light-emitting chip.

[0010] In some optional embodiments, the first light-emitting chip included in the first LED module is a square LED chip. The light-emitting surface of the square LED chip includes a light-emitting area and a peripheral area located on the outer periphery of the light-emitting area. A wavelength conversion layer covers the light-emitting area, and a light-blocking element covers the peripheral area.

[0011] In some optional embodiments, the maximum outer diameter of the first light-emitting chip is greater than or equal to 38 mil. The first LED module includes multiple first light-emitting chips, each of which has a wavelength conversion layer. The multiple first light-emitting chips are arranged in an array at equal intervals.

[0012] In some optional embodiments, the first LED module further includes a wavelength selector, which is disposed in the optical path of the red light and is used to select light within a specified wavelength band for transmission.

[0013] In some optional embodiments, the light source device further includes a focusing lens, and a light combining module is used to guide the emitted light to the focusing lens; after the red light and the first beam pass through the light combining module, they respectively form a red emitted light and a first emitted light, and the light paths of the red emitted light and the first emitted light intersect to form an intersection point, which is located between the light combining module and the focusing lens.

[0014] In some optional embodiments, the light-emitting sides of the first LED module and the second LED module are arranged at a relative interval, and a light-combining module is disposed between the first LED module and the second LED module and is used to conduct red light and the first beam to propagate along a specified direction; the light-combining module includes a first light-combining mirror and a second light-combining mirror, the first light-combining mirror is at a 45-degree angle to the optical path of the red light and is used to reflect the red light and transmit the first beam; the second light-combining mirror is perpendicular to the first light-combining mirror and is used to reflect the first beam and transmit the red light.

[0015] According to a second aspect of this application, an embodiment of this application also provides a light-emitting device, which includes a housing and the aforementioned light source device, wherein the light source device is disposed within the housing.

[0016] This application provides a light source device and a light-emitting device. Since a wavelength conversion layer is used to cover the light-emitting surface of the circular first light-emitting chip, the red light beam emitted by the first LED module can form a circular light spot on the light-combining surface. Therefore, the red light beam can be easily matched with the light beams emitted by other circular chips. Furthermore, when the light source module or the first LED module of this application is matched and combined with other light beams, when the light spots corresponding to other light beams are also circular light spots, the divergence angle of the red light beam in this embodiment can easily be kept consistent with the divergence angle of other light beams, thereby ensuring that the light mixing after light combination is relatively uniform, and ultimately making the light spots of the combined light from the light source module have a high degree of overlap on the light-combining surface.

[0017] Compared to the square light spot corresponding to the beam of a traditional red LED chip, the wavelength conversion layer of the first LED module provided in this application embodiment is disposed on the circular light-emitting surface of the first LED module. After the red light emitted by the first light-emitting chip is mixed with the beam of the second LED module, the consistency of the divergence angle of the beam to be combined can be guaranteed, making the mixed light spot on the light-combining surface more uniform and ultimately achieving a better lighting effect. Based on this, in the solution of this application, there is no need to introduce an additional light homogenizing or mixing module into the light source module. Instead, the matching performance between the red light beam and the first beam is improved by adjusting the shape of the light spot, making it more convenient to achieve light homogenization of the entire light source module. The absence of additional light homogenizing hardware also makes the overall structure of the device simpler and the cost relatively lower, which is conducive to the miniaturization design of the light source device and the light-emitting equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a light-emitting device provided in an embodiment of this application.

[0020] Figure 2 yes Figure 1 A schematic diagram of a light source device in the light-emitting device shown.

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure of the first LED module of the light source device shown.

[0022] Figure 4 yes Figure 3 The diagram shows a three-dimensional exploded view of one structure of the first LED module.

[0023] Figure 5 yes Figure 2 A schematic diagram of the light source device shown.

[0024] Figure 6 yes Figure 1 Another schematic diagram of the light source device in the light-emitting device shown.

[0025] Figure 7 yes Figure 2 An exploded three-dimensional diagram showing another structure of the first LED module.

[0026] Figure 8 yes Figure 3 The diagram shows a frontal projection of the first LED module.

[0027] Figure 9 yes Figure 3 A schematic diagram showing the transmittance of the wavelength selector of the first LED module.

[0028] Figure 10 yes Figure 3 The diagram shows the spectral range of the first LED module.

[0029] Figure 11 This is a schematic diagram of two intersecting beams and their intersection point.

[0030] Figure 12 This is a schematic diagram of the structure of a light-emitting device provided in another embodiment of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0032] Please see Figure 1 This application provides a light source device 100 and a light-emitting device 200 configured with the light source device 100. In some possible embodiments, the light-emitting device 200 can be an illumination device, such as a stage light, flashlight, projector, etc. In other possible embodiments, the light-emitting device 200 can also be a projection device that uses the light source device 100 as an illumination source, etc.

[0033] The light-emitting device 200 may include a light source device 100 and a housing 201. The housing 201 provides an installation space for accommodating the light source device 100 and serves to fix and protect the light source device 100. The light source device 100 generates an illumination beam J, and the housing 201 may also be provided with a light outlet 2120 to allow the illumination beam J to be emitted to the outside through the light outlet 2120.

[0034] Please see Figure 2 The light source device 100 may include a light source module 10 and a light combining module 30. The light source module 10 includes at least a first LED module 12 and a second LED module 14, and the light combining module 30 is used to combine the light from the first LED module 12 and the second LED module 14.

[0035] Please see Figure 3 and Figure 4 In this embodiment, the first LED module 12 includes a first light-emitting chip 121 and a wavelength conversion layer 123. The light-emitting surface of the first light-emitting chip 121 is circular. The wavelength conversion layer 123 is disposed on the circular light-emitting surface of the first light-emitting chip and is excited by the light emitted by the first light-emitting chip 121 to generate red light. As an example, the wavelength conversion layer 123 can cover the entire surface of the light-emitting surface 1210, thereby efficiently utilizing the light emitted by the first light-emitting chip 121 to convert and generate red light. As another example, the light-emitting surface of the first light-emitting chip 121 may not be circular. In this case, the wavelength conversion layer 123 can be circular and cover part of the surface of the light-emitting surface 1210 to form a circular light-emitting surface. For example, the wavelength conversion layer 123 covers 90% or 80% of the area of ​​the light-emitting surface 1210 to adapt to the energy distribution or spot size of the beam of the second LED module 14, or to adapt to the shape of the first light-emitting chip 121 itself. In this example, the shape of the light-emitting surface 1210 is not limited; it can be square, circular, or other shapes.

[0036] In an embodiment of this application, the second LED module 14 includes a second light-emitting chip 141. The light-emitting surface of the second light-emitting chip 141 is circular. The second light-emitting chip 141 is used to emit a first light beam, and the light spot formed by the first light beam on the light-combining surface is circular. Please refer to [link / reference]. Figure 5The light combining module 30 is disposed in the optical path of the red light and the first beam to combine the red light and the first beam to form the emitted light L1. In the light source device 100 provided in this embodiment, since a circular first light-emitting chip 121 is used in conjunction with a wavelength conversion layer 123, the spot of the red light beam emitted by the first light-emitting chip 121 in the first LED module 12 through the wavelength conversion layer 123 is also approximately circular, and the divergence angle of the red light beam is matched with that of the first beam. Furthermore, when the light source module 10 or the first LED module 12 of this application is matched and combined with other beams, when the spot corresponding to the other beams is also a circular spot, the divergence angle of the red light beam in this embodiment is easy to keep in line with the divergence angle of the other beams, thereby ensuring that the light mixing after combining is relatively uniform, and ultimately making the spot overlap of the combined light of the light source module 10 on the light combining surface relatively high.

[0037] Therefore, compared to the square light spot corresponding to the beam of a red LED chip in traditional technology, the red light emitted by the first LED module provided in this application embodiment, after being mixed with the beam of the second LED module 14, can ensure the consistency of the divergence angle of the beam to be combined, making the mixed light spot on the light combining surface more uniform, and ultimately achieving a better lighting effect. Based on this, in the solution of this application, there is no need to introduce an additional light homogenizing or mixing module in the light source module 10. Instead, the matching performance between the red light beam and the first beam is improved by adjusting the shape of the light spot, making it more convenient for the light source module 10 to achieve light homogenization as a whole. The absence of additional light homogenizing hardware also makes the overall structure of the device simpler and the cost relatively lower, which is conducive to the miniaturization design of the light source device 100 and the light-emitting device 200.

[0038] In this embodiment, the first light beam emitted by the second LED module 14 can be blue or green light, which is used to mix with the red light beam of the first LED module 12 to obtain the light of the desired color. As an example, the first light beam is blue light.

[0039] Please see Figure 6 ,exist Figure 6In the illustrated embodiment, the light source module 10 may further include a second LED module 16, which emits a second light beam. The light combining module 30 combines the red light, the first light beam, and the second light beam to achieve the desired color of emitted light L1. In this embodiment, the light spot corresponding to the second light beam is circular, that is, the light spot formed by the second light beam on the light combining surface is circular. Therefore, the divergence angles of the second light beam, the first light beam, and the red light beam can remain basically consistent, thereby ensuring that the light mixing after combining is relatively uniform. The color of the second light beam can be the same as or different from the color of the first light beam. If the color of the second light beam is the same as the color of the first light beam, the brightness of the corresponding color in the combined light beam can be increased. In this embodiment, the colors of the red light beam, the first light beam, and the second light beam are all different so that the three beams can present the desired lighting color after mixing. For example, the color gamut of the lighting color achieved after mixing the beams at a set power is wider. In this embodiment, the color of the first light beam is blue, and the color of the second light beam is green, so that the red light beam, the first light beam, and the second light beam can produce high-quality white light after mixing.

[0040] It should be understood that in the embodiments of this application, the light spots formed by the first beam and / or the second beam on the light combining surface can both be circular light spots. Specifically, the light-emitting surfaces of the second LED module 14 or / and the third LED module 16 can be circular to achieve circular light spots. For example, using blue LED chips and green LED chips in conventional technology, when these chips are used as the second LED module 14 or / and the third LED module 16 in this embodiment of the application to cooperate with the first LED module 12 in the above embodiment, the divergence angles of the red, green and blue beams can be kept consistent to a large extent, thereby resulting in a better final light mixing effect.

[0041] The following will describe in detail the various components of the light source device 100 and the light-emitting device 200 provided in some embodiments of this application.

[0042] Please refer to it again. Figure 3In some embodiments of this application, the first LED module 12 may further include a first base 127, on which a first light-emitting chip 121 is disposed. The first base 127 may be a dielectric substrate, on which conductive traces for electrical connection with the first light-emitting chip 121 may be provided. The first light-emitting chip 121 may be a laser chip or an LED chip, which is packaged on the first base 127 to improve the convenience of optical path installation and debugging. As one implementation, the first light-emitting chip 121 may be mounted on the first base 127 using a surface mount device (SMD) process to improve the integration of the first LED module 12. In other possible embodiments, the first light-emitting chip 121 may also be fixed on the first base 127 using a transistor outline (TO) package, which is not limited in this embodiment.

[0043] The first LED module 12 may further include a first heat sink 129, which is disposed on the side of the first base 127 away from the first light-emitting chip 121, to dissipate heat from the first base 127 and the first light-emitting chip 121 to the outside. The first heat sink 129 may be made of a material with good thermal conductivity (e.g., a metal material), which can play a good heat dissipation role to ensure the working efficiency of the first light-emitting chip 121.

[0044] In some embodiments, depending on the type of the first light-emitting chip 121, the first light-emitting chip 121 can be a laser chip or an LED chip, capable of emitting short-wavelength excitation light to excite the wavelength conversion layer 123 to generate red light. As an example, the excitation light emitted by the first light-emitting chip 121 can be blue light with a wavelength greater than or equal to 450 nm and less than or equal to 500 nm; or, the excitation light emitted by the first light-emitting chip 121 can be violet laser with a wavelength greater than or equal to 400 nm and less than or equal to 450 nm; or, the excitation light emitted by the first light-emitting chip 121 can be ultraviolet laser with a wavelength less than or equal to 420 nm. In some specific examples, the first light-emitting chip 121 can be a blue laser chip or a blue LED chip.

[0045] From the structural design of the first light-emitting chip 121, the first light-emitting chip 121 can be a circular chip. Figure 4 In the embodiment shown, the first light-emitting chip 121 is a circular LED chip, and the light-emitting surface 1210 of the first light-emitting chip 121 is also circular. A circular wavelength conversion layer 123 covers the surface of the light-emitting surface 1210.

[0046] In other embodiments, the first light-emitting chip 121 can be a square chip, such as a square LED wafer or a square laser chip. Using a square chip allows for the use of conventional chip construction, thereby achieving relatively low manufacturing costs. Figure 4 In the illustrated embodiment, the first light-emitting chip 121 is a square LED chip, and the light-emitting surface 1210 of the first light-emitting chip 121 is also square. A circular wavelength conversion layer 123 covers a portion of the surface of the light-emitting surface 1210. Specifically, the light-emitting surface 1210 may have a light-emitting region 1211 and a peripheral region 1213 located around the light-emitting region 1211. The portion covered by the wavelength conversion layer 123 is defined as the light-emitting region 1211, and the peripheral region 1213 is adjacent to and surrounds the outer periphery of the light-emitting region 1211. The peripheral region 1213 and the light-emitting region 1211 together constitute the square light-emitting surface 1210, wherein the light-emitting region 1211 constitutes the light-emitting surface of the first light-emitting chip 121. It should be understood that the names “peripheral region 1213” and “light-emitting region 1211” mentioned above are only for the convenience of description. Although the peripheral region 1213 and the light-emitting region 1211 use different names to refer to different parts of the light-emitting surface 1210, these names should not be regarded as restrictions on the structure of the light-emitting surface 1210. These names are only for the convenience of description. For example, the light-emitting surface 1210 can be a continuous plane, and there may be no obvious dividing line between the peripheral region 1213 and the light-emitting region 1211.

[0047] To suppress stray light from other colors of light (such as blue or purple light emitted by the first light-emitting chip 121 itself), a light-shielding layer or a light-filtering layer may be applied to the peripheral area 1213 to improve the color purity of the emitted red light beam. Specifically, in other embodiments, the first LED module 12 may further include a light-blocking element 124, which substantially completely covers the peripheral area 1213 to block the light directly emitted from the first light-emitting chip 121. The light-blocking element 124 may include at least one of a reflective layer, a light-shielding layer, and a light-filtering layer.

[0048] As an example, the light-blocking member 124 may include a reflective layer, which may be coated or attached to the peripheral area 1213, with the reflective surface of the reflective layer facing the first light-emitting chip 121. When the first light-emitting chip 121 emits light, a portion of the light will shine through the light-emitting area 1211 onto the wavelength conversion layer 123 to excite red light, while another portion of the light will be emitted through the peripheral area 1213. The light emitted through the peripheral area 1213 will be reflected by the reflective layer and may undergo multiple reflections between the first light-emitting chip 121 and the reflective layer until it propagates into the light-emitting area 1211, thereby exciting red light. In this way, the utilization rate of the light from the first light-emitting chip 121 can be improved, light loss can be minimized, and the power of the red light can be increased.

[0049] As another example, the light-blocking component 124 may include a light-shielding layer, which may be an ink coating layer or an ink light-absorbing layer coated or attached to the peripheral area 1213. It can be used to absorb the light emitted by the non-light-emitting area 1211 emitted by the first light-emitting chip 121, thereby ensuring that the light emitted from the first LED module 12 is all excited red light and basically does not contain other light, and the color purity of the red light is relatively high.

[0050] As another example, the light-blocking element 124 may include a filter layer, which may be a filter sheet, filter film, etc., coated or attached to the peripheral area 1213. This filter layer can allow light of a specific wavelength to pass through, for example, allowing red light while blocking other colors of light, thereby ensuring that the color purity of the red light emitted from the first LED module 12 is relatively high. In some specific examples, the wavelength range through which the filter layer of the light-blocking element 124 passes may be greater than or equal to 580nm and less than or equal to 700nm. It should be understood that in other embodiments, the light-blocking element 124 on the light-emitting surface 1210 may be omitted, and a corresponding filter or wavelength selector may be provided in the light path of the red light to achieve the function of filtering stray light.

[0051] Please see Figure 7From the structural configuration of the first light-emitting chip 121, in some other embodiments, the first light-emitting chip 121 can also be a circular chip, such as a circular LED wafer, like a circular blue LED wafer. In this case, the wavelength conversion layer 123 can cover the entire surface of the light-emitting surface 1210, thereby enabling the wavelength conversion layer 123 to be excited by almost all the light from the first light-emitting chip 121. As an example, the circular structure of the first light-emitting chip 121 can be formed by a cutting process, such as obtaining a circular LED wafer that meets the requirements by laser cutting on a square wafer. The edges of the cut circular LED wafer can be further rounded to reduce stress concentration, prevent chip breakage, and reduce potential contamination in subsequent packaging processes. In this example, the square wafer used as the basis for cutting can adopt a vertical structure, for example, the two electrodes of the square wafer are respectively on both sides of the epitaxial layer, and the current flows vertically, which can reduce lateral current and thus achieve better light emission uniformity and thermal performance. Furthermore, a circular mesa or ring electrode can be provided inside the square wafer to optimize the current distribution and light emission angle from a physical structure perspective, which is beneficial for subsequent cutting to form a circular LED wafer. In this embodiment, the circular light-emitting surface of the first light-emitting chip 121 allows light to enter the encapsulation lens of the first LED module 12 uniformly, which can avoid astigmatism and chromatic aberration caused by large-angle refraction at the edge of the square chip, and the surface distribution of the light spot formed by the light beam on the light combining surface is relatively uniform.

[0052] In some embodiments, the first light-emitting chip 121 can be a large-size chip. For example, the maximum outer diameter of the first light-emitting chip 121 is greater than or equal to 38 mil. When the first light-emitting chip 121 is circular, its diameter can be 38 mil, 40 mil, 45 mil, 50 mil, 55 mil, etc.; when the first light-emitting chip 121 is square, its side length can be 38 mil, 40 mil, 45 mil, 50 mil, 55 mil, etc. As an example of a range, the maximum outer diameter of the first light-emitting chip 121 can range from 38 mil to 50 mil (including the endpoints). By using a larger-size first light-emitting chip 121, its heat dissipation area is larger, which is beneficial for handling higher power. Furthermore, the effective light-emitting area of ​​the larger-size first light-emitting chip 121 is relatively larger, and the light beam formed is also larger, which is beneficial for matching and combining with the blue and green light in the second LED module 14 and the third LED module 16.

[0053] Please see Figure 8In some embodiments, the first LED module 12 may include multiple first light-emitting chips 121, each of which is a circular chip and has a wavelength conversion layer 123. The multiple first light-emitting chips 121 can be arranged in an array with equal spacing. For example, the multiple first light-emitting chips 121 can be arranged in an N*M array, where N≥1, M≥1, and N and M are positive integers. In this embodiment, the multiple first light-emitting chips 121 are arranged in a 4*4 array on the first base 127. In this embodiment, the emitted light L1 formed by the arrayed multiple first light-emitting chips 121 forms a light spot on a designated light-combining surface. Because the total area of ​​the multiple first light-emitting chips 121 is relatively large, the void area between the beams corresponding to the multiple first light-emitting chips 121 is very small, thus making the beam of the first LED module 12 fuller and the color distribution more uniform.

[0054] Through simulation comparison experiments of first light-emitting chips of various sizes, it can be seen that in the embodiments of this application, each first light-emitting chip 121 adopts a larger size (e.g., the maximum outer diameter is greater than or equal to 38mil) circular LED wafer, so that the beams of multiple first light-emitting chips 121 are arranged more compactly. While increasing the light-emitting area of ​​the first LED module 12, it can effectively reduce the void area between beams caused by the arrangement. The beam of the first LED module 12 is fuller and the color distribution is more uniform. Ultimately, it is beneficial to achieve a more uniform light combination of red light and the beams of the second LED module 14 and the third LED module 16.

[0055] In some embodiments of this application, the wavelength conversion layer 123 can be a transmissive wavelength conversion device, which can be attached to the light-emitting region 1211 or coated on the light-emitting region 1211 to form a film. The wavelength conversion layer 123 contains fluorescent material, and the wavelength conversion layer emits red light when excited by short-wavelength light (violet or blue light). As an example, the wavelength conversion layer 123 can be a multilayer thin film structure, for example, it can include a transparent substrate and a fluorescent material film layer attached to the transparent substrate, wherein the transparent substrate can be a sapphire substrate or yttrium oxide ceramic, etc., which have high thermal conductivity and light transmittance. Further, the wavelength conversion layer 123 can also include an optical dielectric film, which can cover the surface of the fluorescent material film layer. For example, the optical dielectric film can be an antireflective film to improve light transmittance, or the optical dielectric film can be a filter film disposed on the light-emitting side of the wavelength conversion layer 123 to filter light other than red light, thereby improving the color purity of the excited red light. As another example, the wavelength conversion layer 123 can be a single-layer structure, such as a single fluorescent material film directly coated or attached to the light-emitting region 1211.

[0056] Please refer to it again. Figure 2 and Figure 3In some embodiments of this application, the first LED module 12 may further include a first encapsulated lens 128. The first encapsulated lens 128 is disposed on the light-emitting side of the wavelength conversion layer 123 to collect and collimate the red light generated by the wavelength conversion layer 123, so that the red light can be transmitted to the light combining module 30. The first encapsulated lens 128 may include one lens or a collection of multiple lenses. As an example, the first encapsulated lens 128 includes a collecting lens 1281 and a collimating lens 1283. The collecting lens 1281 covers the wavelength conversion layer 123 to collect the red light generated by the wavelength conversion layer 123 when excited, thereby ensuring a high light utilization rate. The collecting lens 1281 can be directly encapsulated or bonded to the LED chip bracket, such as the first base 127, so as to effectively converge the light emitted by the first light-emitting chip 121 and achieve the required light emission angle, such as different light emission angles of 120 degrees, 90 degrees, and 60 degrees, so as to facilitate the collimating lens 1283 to further converge and collimate the light. The collimating lens 1283 and the first packaged lens 128 are coaxially arranged. The collimating lens can be an aspherical lens, resulting in high collimation of the beam and a small divergence angle (e.g., less than 2 degrees or even less than 0.5 degrees). As another example, the first packaged lens 128 may include a total internal reflection (TIR) ​​lens, which combines the functions of collecting and collimating lenses, facilitating the packaging and integration of the first LED module 12.

[0057] In some embodiments of this application, the first LED module 12 may further include a wavelength selector 125. The wavelength selector 125 is disposed in the optical path of the red light and is used to select light within a specified wavelength band for transmission. The specified wavelength band can be greater than or equal to 580nm and less than or equal to 700nm. Therefore, the wavelength selector 125 can selectively transmit light in the red light band while blocking other wavelength bands, allowing the red light beam to pass through while avoiding stray light of other colors, resulting in higher color purity and relatively higher color stability of the beam. Please refer to [link to relevant documentation]. Figure 9 , Figure 9 A schematic diagram illustrating the transmittance of a wavelength selector 125 in one example of this application is shown. In this example, the wavelength selector 125 is used to transmit light above 580 nm. Please refer to... Figure 10 , Figure 10 This diagram illustrates the spectral range of the first LED module 12 provided in this embodiment. Figure 10 (A) shows the spectral range when the wavelength selector 125 is not provided in the first LED module 12. Figure 10(B) shows the spectral range when the wavelength selector 125 is provided in the first LED module 12. As can be seen from the figure, in the example where the wavelength selector 125 is provided, the color purity of the emitted red light beam is significantly improved. Through experiments on the color coordinate shift of the first LED module 12 conducted by the inventors, it was found that when the operating temperature of the first LED module 12 increases from 25°C to 85°C, the color coordinate shift of the first LED module 12 with the wavelength selector 125 is smaller than the color coordinate shift without the wavelength selector 125.

[0058] Furthermore, the wavelength selection element 125 in this embodiment may include at least one of a filter element and a filter film. As an example, the wavelength selection element 125 may be a filter film, which may be a film layer structure and attached to the light-emitting side of the first encapsulation lens 128 or the wavelength conversion layer; the filter film may also be integrated into the light combining module 30, for example, it may be attached to the reflector or beam splitter / combiner of the light combining module 30. As another example, the wavelength selection element 125 may be a separate filter element, which may be disposed on either side of the first LED module 12 or the first encapsulation lens 128 (e.g., ...). Figure 2 and Figure 3 (As shown).

[0059] In some embodiments of this application, the second LED module 14 includes a second light-emitting chip 141, and the third LED module 16 includes a third light-emitting chip 161. For example, the second LED module 14 is used to emit blue LED light, and the third LED module 16 is used to emit green LED light. Since the color purity and uniformity of LED light are both high, mixing blue LED light, green LED light, and the red light from the first LED module 12 can improve the illumination quality of the emitted light L1. The emitted light-emitting surface of the third light-emitting chip 161 is circular. Further, both the second light-emitting chip 141 and the third light-emitting chip 161 can be circular LED chips, and the divergence angle of the red light is consistent with the divergence angle of the first beam (blue light) and the divergence angle of the second beam (green light). Since the red light beam corresponds to a circular spot, it has already eliminated the geometric asymmetry of the light distribution to a certain extent. In this embodiment, a first beam (e.g., blue light) and a second beam (e.g., green light) with equally circular spots are further used, so that the intensity distribution of the blue, green, and red light beams can be basically rotationally symmetrical (Lambertian characteristics). The beam characteristics of the three beams are highly matched. Therefore, the three-color light spots formed after being combined by the light combining module 30 almost completely overlap in space, and there is no red edge or color spot phenomenon after light mixing. Compared with the cross-shaped light spot caused by the use of square chips in the traditional technology, the light source module 10 in this embodiment has a better light mixing and uniformity effect, and the divergence angle of the mixed light spot is also more uniform. Furthermore, the circular light-emitting surfaces of the second light-emitting chip 141 and the third light-emitting chip 161 can make the light uniformly incident on their respective encapsulation lenses, which can avoid astigmatism and chromatic aberration caused by large-angle refraction at the edge of the square chip, further ensuring a better light mixing effect.

[0060] In some embodiments of this application, the second LED module 14 may further include a second base, a second encapsulation lens, and a second heat sink (not shown in the figures). The second light-emitting chip 141 is disposed on the second base, the second encapsulation lens is disposed on the light-emitting side of the second light-emitting chip 141, and the second heat sink is disposed on the side of the second base away from the second light-emitting chip 141. The third LED module 16 may further include a third base, a third encapsulation lens, and a third heat sink (not shown in the figures). The third light-emitting chip 161 is disposed on the third base, the third encapsulation lens is disposed on the light-emitting side of the third light-emitting chip 161, and the third heat sink is disposed on the side of the third base away from the third light-emitting chip 161.

[0061] In the embodiment of the present application, the light combining module 30 is disposed on the optical paths of red light, the first light beam and the second light beam, and is configured to combine the three light beams. In this embodiment, the first LED module 12 and the second LED module 14 are arranged at an interval, and their light-emitting surfaces are opposite to each other, so the optical paths (the red light and the first light beam) of the two modules are substantially parallel or coincident, and the light combining module 30 is disposed between the first LED module 12 and the second LED module 14. Further, the third LED module 16 can be disposed on one side of the light combining module 30, and the third LED module 16 and the light combining module 30 are arranged side by side along the specified direction X.

[0062] The light combining module 30 may include a first light combining mirror 32 and a second light combining mirror 34. The first light combining mirror 32 can be disposed on the optical path of the red light, and is arranged at an angle of 45 degrees relative to the optical path of the red light. Further, the first light combining mirror 32 is configured to reflect the red light to propagate along the specified direction X, so a red light reflection film for reflecting the red light can be disposed on the first light combining mirror 32. Since the second LED module 14 and the first LED module 12 are arranged opposite to each other and located on one side of the first light combining mirror 32, and the third LED module 16 and the light combining module 30 are arranged side by side along the specified direction X, in order to ensure that the first light beam (blue light) and the second light beam (green light) can also propagate along the specified direction X, a film layer allowing blue light and green light to transmit can also be disposed on the first light combining mirror 32. As an example, the first light combining mirror 32 may be a dichroic sheet, specifically an interference filter that transmits blue and green light and reflects red light.

[0063] The second light combining mirror 34 can be disposed on the optical path of the first light beam, and is arranged at an angle of 45 degrees relative to the optical path of the first light beam. Specifically, the second light combining mirror 34 can be substantially perpendicular to the first light combining mirror 32, and the two can be inserted into each other, so that the volume of the light combining module 30 is relatively small. Further, the second light combining mirror 34 is configured to reflect the first light beam (blue light) to propagate along the specified direction X, so a blue light reflection film for reflecting blue light can be disposed on the second light combining mirror 34. Since the second LED module 14 and the first LED module 12 are arranged opposite to each other and located on one side of the first light combining mirror 32, and the third LED module 16 and the light combining module 30 are arranged side by side along the specified direction X, in order to ensure that the red light and the second light beam (green light) can also propagate along the specified direction X, a film layer allowing red light and green light to transmit can also be disposed on the second light combining mirror 34. As an example, the second light combining mirror 34 may be a dichroic sheet, specifically an interference filter that transmits red and green light and reflects blue light. In this embodiment, the second LED module 14, the third LED module 16 and the first LED module 12 are arranged in a roughly "triangular" spatial arrangement, and the light combining module 30 is disposed between the three. Therefore, the optical paths of red light, the first light beam (blue light) are respectively perpendicular to the optical path of the second light beam (green light), which can reduce the overall space occupied by the light source device 100, facilitate the miniaturization of the light-emitting device 200, and thus enable it to adapt to the requirements of application places with various requirements.

[0064] In some embodiments, please refer again Figure 6 The light source device 100 may also include an aperture 40, which is disposed on the light-emitting side of the light combining module 30 and located in the optical path of the emitted light L1. By controlling the aperture through which the light passes, the aperture 40 can ensure that the light spot on the light combining surface has a clear and sharp boundary.

[0065] In some embodiments, the light source device 100 may further include a condenser lens 50, and a beam combining module 30 is used to guide the emitted light L1 to the condenser lens 50. Red light, a first beam (e.g., blue light), and a second beam (e.g., green light) pass through the beam combining module 30 to form red emitted light, a first emitted light (e.g., blue emitted light), and a second emitted light (e.g., green emitted light), respectively. In some embodiments, the red emitted light, the first beam (e.g., blue light), and the second beam (e.g., green light) do not strictly propagate coaxially, or are not necessarily completely parallel to the specified direction X. Therefore, the optical paths of the red emitted light, the first beam (e.g., blue light), and the second beam (e.g., green light) intersect each other to form at least one intersection point. Figure 11 As shown. In this embodiment, the condensing lens 50 is disposed outside the aforementioned at least one intersection point; in other words, the at least one intersection point is located between the beam combining module 30 and the condensing lens 50. Since the aforementioned at least one intersection point is formed by the intersection of at least two of the three outgoing beams, and these outgoing beams propagate in space with a certain diffusion angle, the two intersecting beams will have spatially non-overlapping portions before the intersection point, while after the intersection point, the corresponding light spots of the two beams can achieve a large area of ​​overlap (e.g., ...). Figure 11 As shown), the beams of different colors have been fully mixed. By placing the condenser lens 50 after the intersection, the overlapping and fully mixed beams can be converged, which can improve the spatial distribution uniformity of the emitted light L1 after convergence, thereby obtaining a more uniform and consistent "white light" spot.

[0066] As a specific example, taking red light and the first beam as an example, after the red light and the first beam pass through the light combining module 30, they form red emitted light and first emitted light respectively. The light paths of the red emitted light and the first emitted light intersect to form an intersection point, which is located between the light combining module 30 and the condensing lens 50. Figure 11 A schematic diagram showing two intersecting beams of light (illustrated in red and green respectively) and their intersection point is shown. Figure 11If the condenser lens 50 is positioned at the front of the intersection point, such as at position ①, the two light beams are not fully mixed, resulting in inconsistent colors in the focused spot and the edges of the beam. If the condenser lens 50 is positioned at position ②, the two light beams, after intersecting at the intersection point, have a certain spatial expansion angle, thus fully mixing. The light propagating to the condenser lens 50 is the fully mixed beam. Even if the edges of the two light beams after the intersection point are not fully mixed due to the intersection, they will not propagate to the condenser lens 50. Therefore, the light received at any point in space on the condenser lens 50 is highly likely to be light from both of the aforementioned light beams simultaneously. The non-uniformity of the light sources corresponding to the two light beams (such as bright center and dark edge) is greatly weakened by the diffusion effect after the intersection, becoming relatively smooth. Furthermore, the proportion of the two light beams received at different positions on the condenser lens 50 tends to be consistent, and the spot distribution of the mixed beam is more uniform, which can effectively improve the beam uniformity and color temperature consistency of the final illumination beam J, thereby reducing the color difference of the spot in the illumination beam J and improving color consistency.

[0067] It should be understood that the above example only describes the intersection of two light beams. In some specific examples, the intersection of three light beams can form two intersection points, and the condenser lens 50 can be positioned after at least one of these two intersection points. That is, at least one of these two intersection points is located between the light combining module 30 and the condenser lens 50, which can also achieve a better light mixing uniformity effect. The condenser lens 50 in this embodiment can be a cylindrical lens or an aspherical lens, etc.

[0068] Please refer again to some embodiments of this application. Figure 6 The light source device 100 may further include a light-mixing module 60, which is disposed in the optical path of the emitted light L1 and located between the light-combining module 30 and the condenser lens 50. The light-mixing module 60 is used to mix the emitted light L1, ensuring that the emitted light L1 is sufficiently mixed before entering the condenser lens 50, which helps to improve the uniformity of the final illumination beam J. In this embodiment, the light-mixing module 60 may include at least one of a diffuser, a light-mixing plate, a light-mixing rod, a compound eye lens, etc. In some examples, the distance between the condenser lens 50 and the light-mixing module 60 is as large as possible to ensure that the emitted light L1 is sufficiently mixed before reaching the condenser lens 50.

[0069] Please see Figure 12In some embodiments, the light-emitting device 200 may further include a lens assembly 300, which is disposed in the optical path of the condenser lens 50 and is used to focus the emitted light L1 and direct it to the outside. The lens assembly 300 may include two condenser lenses, which are sequentially disposed in the optical path of the emitted light L1 to focus and converge the emitted light L1. The aforementioned condenser lenses may be cylindrical lenses, such as biconcave cylindrical lenses, plano-convex cylindrical lenses, etc., and this embodiment does not limit this.

[0070] In this application specification, certain terms are used to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem within a certain margin of error and basically achieve the technical effect.

[0071] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inside", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application 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, they should not be construed as limitations on this application.

[0072] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A light source device, characterized in that, include: The first LED module includes a first light-emitting chip and a wavelength conversion layer. The wavelength conversion layer is disposed on the light-emitting surface of the first light-emitting chip and generates red light by being excited by the light from the first light-emitting chip. The light-emitting surface of the first light-emitting chip is circular. The second LED module includes a second light-emitting chip, the light-emitting surface of the second light-emitting chip is circular, and the second light-emitting chip is used to emit a first light beam; as well as A beam combining module is disposed in the optical path of the red light and the first beam to combine the red light and the first beam for emission.

2. The light source device according to claim 1, characterized in that, The light source device further includes a third LED module for emitting a second beam, the third LED module containing a third light-emitting chip, the light-emitting surface of the third light-emitting chip being circular; the light combining module is also disposed in the optical path of the second beam and is used to combine the red light, the first beam, and the second beam to form the emitted light.

3. The light source device according to claim 2, characterized in that, The divergence angle of the red light is the same as that of the first beam and the second beam.

4. The light source device according to claim 1, characterized in that, The first LED module includes a first light-emitting chip that is a circular LED wafer, and the wavelength conversion layer covers the entire surface of the first light-emitting chip.

5. The light source device according to claim 1, characterized in that, The first LED module includes a first light-emitting chip that is a square LED chip. The light-emitting surface of the square LED chip includes a light-emitting area and a peripheral area located on the outer periphery of the light-emitting area. The wavelength conversion layer covers the light-emitting area, and a light-blocking element is covered on the peripheral area.

6. The light source device according to claim 1, characterized in that, The maximum outer diameter of the first light-emitting chip is greater than or equal to 38 mil. The first LED module includes multiple first light-emitting chips, each of which has a wavelength conversion layer. The multiple first light-emitting chips are arranged in an array at equal intervals.

7. The light source device according to claim 1, characterized in that, The first LED module further includes a wavelength selector, which is disposed in the optical path of the red light and is used to select light within a specified wavelength band for transmission.

8. The light source device according to any one of claims 1 to 7, characterized in that, The light source device further includes a focusing lens, and the light combining module is used to guide the emitted light to the focusing lens; the red light and the first light beam, after passing through the light combining module, respectively form red emitted light and first emitted light, and the light paths of the red emitted light and the first emitted light intersect to form an intersection point, which is located between the light combining module and the focusing lens.

9. The light source device according to any one of claims 1 to 7, characterized in that, The light-emitting sides of the first LED module and the second LED module are arranged at a distance from each other, and the light-combining module is disposed between the first LED module and the second LED module, and is used to conduct the red light and the first light beam to propagate along a specified direction; The light combining module includes a first light combining mirror and a second light combining mirror. The first light combining mirror is at a 45-degree angle to the optical path of the red light and is used to reflect the red light and transmit the first beam. The second light combining mirror is perpendicular to the first light combining mirror and is used to reflect the first beam and transmit the red light.

10. A light-emitting device, characterized in that, include: case; as well as The light source device as described in any one of claims 1 to 9, wherein the light source device is disposed within the housing.

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