TWI882499B - Light source module - Google Patents

Abstract

A light source module, including a substrate; a light-emitting element disposed on the substrate, and the light-emitting element has a light-emitting surface; a cup shell disposed on the substrate and having a top surface, the cup shell disposed around the light-emitting element to form an accommodating space, wherein a vertical distance from a light-emitting surface of the light-emitting element to the substrate is greater than or equal to a vertical distance from a top surface of the cup shell to the substrate.

Description

Light source module

The present disclosure relates to a light emitting element, and more particularly to a light source module.

Light-emitting diodes (LEDs) have gradually replaced traditional light sources in recent years due to their small size, high brightness, and low energy consumption. LEDs are currently widely used in backlight modules as light-emitting components.

In the existing backlight module design, multiple light source modules with light-emitting elements, reflective cup shells and substrates are installed on the circuit board. The cup shell design with higher technology often limits the light output angle of the light source module, thereby limiting the spot size of the light source module on the light output plane. In addition, when the pitch between the light source modules is too large, dark areas will appear between the light source modules, resulting in poor uniformity and causing poor visual experience. Although the above problems can be improved by reducing the pitch between the light source modules, the number of light source modules must be increased when reducing the pitch, resulting in increased costs.

The present disclosure provides a light source module, including a substrate; a light-emitting element, which is arranged on the substrate and has a light-emitting surface; a cup shell, which is arranged on the substrate and has a top surface, and the cup shell is arranged around the light-emitting element to form a containing space, wherein the vertical distance from the light-emitting surface of the light-emitting element to the substrate is greater than or equal to the vertical distance from the top surface of the cup shell to the substrate.

The following disclosure provides many different embodiments or examples to show the different components of the disclosed embodiments. The following will disclose specific examples of the various components of this specification and their arrangement to simplify the disclosure. Of course, these specific examples are not intended to limit the disclosure. For example, if the following invention in this specification describes forming a first component on or above a second component, it means that it includes an embodiment in which the first and second components formed are in direct contact, and also includes an embodiment in which an additional component can be formed between the first and second components, and the first and second components are not in direct contact. In addition, the various examples in the disclosure may use repeated reference symbols and/or words. The purpose of these repeated symbols or words is to simplify and clarify, and is not intended to limit the relationship between the various embodiments and/or the configurations.

In addition, spatially related terms may be used, such as "under", "below", "down", "above", "above", "upper", and similar terms. These spatially related terms are used to facilitate the description of the relationship between one (or some) element or feature and another (or some) element or feature in the diagram. These spatially related terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. When the device is turned to a different orientation (for example, rotated 90 degrees or other orientations), the spatially related adjectives used therein will also be interpreted according to the orientation after the rotation.

Here, the terms "about", "approximately", and "generally" generally mean within 20% of a given value or range, preferably within 10%, and more preferably within 5%, or within 3%, or within 2%, or within 1%, or within 0.5%. It should be noted that the quantities provided in the specification are approximate quantities, that is, in the absence of specific description of "about", "approximately", and "generally", the meaning of "about", "approximately", and "generally" can still be implied.

In addition, in some embodiments of the present disclosure, terms such as "disposed", "connected" and similar terms, unless otherwise specifically defined, may refer to two components being in direct contact, or may refer to two components not being in direct contact, wherein an additional component is located between the two structures. Terms related to disposition and connection may also include situations where both structures are movable, or both structures are fixed.

Refer to FIG. 1, which is a centerline cross-sectional view of the existing light source module structure. As shown in FIG. 1, the existing light source module structure generally includes a substrate S, a light-emitting element L disposed on the substrate S, the light-emitting element L includes a light-emitting surface P, and a cup shell C disposed on the substrate S for reflection. However, due to the configuration that the light-emitting surface P of the existing light source module structure is lower than the cup shell C, the cup shell C blocks the light emitted by the light-emitting surface P (especially the light at a large angle), thereby limiting the light output angle of the light source module. In addition, as shown in FIG. 2, the limitation of the light output angle further limits the size of the light spot that can be generated by the light source module on the light output plane PS. When the pitch d1 (the distance between the centers of the two light source modules) between the light source modules increases, the insufficient size of each light spot leads to a dark area D between the light spots. Such uneven light spots cause problems such as poor visual experience.

In order to solve at least the above-mentioned technical problems, the present disclosure provides a light source module, wherein the light source module has a configuration in which the light emitting surface of the light emitting element is higher than the cup shell. Since the light emitting surface of the light source module of the present disclosure is higher than or equal to the cup shell, the light emitting angle of the light source module can be increased, and a larger light spot can be formed on the light emitting plane, thereby increasing the light spot uniformity of the light source module. The light source module of the present disclosure has a larger light emitting angle and excellent uniformity, which can reduce the number of light emitting diodes in the light source module, thereby reducing the manufacturing cost.

Please refer to FIG. 3A. FIG. 3A is a centerline cross-sectional view of a light source module 100 according to some embodiments of the present disclosure. As shown in FIG. 3A, the light source module 100 may include a substrate 101, a light emitting element 102, a cup 103, and a wire structure 104. The above elements will be described in detail as follows.

In some embodiments, the substrate 101 can be any suitable substrate. For example, the substrate 101 can be a transparent substrate or an opaque substrate. In some embodiments, the substrate 101 is a soft substrate. In some embodiments, the substrate 101 is a rigid substrate. For example, the material of the substrate 101 can be resin, sapphire, silicon, glass, metal, ceramic, or other suitable materials. In some embodiments, the substrate 101 further includes a conductive line layer (not shown) located on the substrate 101. In this way, the substrate 101 can be electrically connected to the light-emitting element 102 through the conductive line layer.

Referring to FIG. 3A , the light emitting element 102 is disposed above the substrate 101. The light emitting element 102 includes a light emitting surface 102t, which has a vertical distance h1 (hereinafter referred to as the light emitting surface height h1) from the top surface 101t of the substrate 101. In some embodiments, the light emitting element 102 includes a light emitting diode chip capable of emitting a specific wavelength. For example, the light emitting element 102 may include a light emitting diode chip that emits blue light or a light emitting diode chip that emits ultraviolet light.

Referring to FIG. 3A , the cup shell 103 is disposed around the light-emitting element 102 to form a containing space. In some embodiments, the cup shell 103 may be any suitable reflective material. For example, the material of the cup shell 103 may include thermosetting materials, such as epoxy molding compound (EMC), silicone molding compound (SMC); thermoplastic materials, such as polyphthalamide (PPA), poly(1,4-cyclohexylene dimethylene terephthalate), PCT, and other suitable materials. In some embodiments, the light transmittance of the material of the cup shell 103 may be between 15% and 50%, for example, 10% to 45%. In some embodiments, the cup shell 103 is made of semi-transparent material.

Continuing to refer to FIG. 3A , there is a vertical distance h2 (i.e., the height h2 of the shell) between the top surface 103t of the shell 103 and the top surface 101t of the substrate 101. In some embodiments, the height h1 of the light-emitting surface is greater than the height h2 of the shell. Similarly, compared with the configuration of the shell being higher than the light-emitting surface in the structure of FIG. 1 (as shown in FIG. 1 ), the configuration of the light-emitting surface being higher than the shell in some embodiments of the present disclosure can reduce the absorption of light (especially large-angle light) by the shell, allowing the light to be emitted at a larger angle, increasing the light spot of the light source module on the light-emitting plane, and improving the light-emitting uniformity of the light source module. Specifically, in some embodiments, the ratio of the luminous surface height h1 to the cup shell height h2 is between 1 and 1.66, such as 1 and 1.33. For example, in some embodiments, the luminous surface height h1 may be between 0.15 mm and 0.25 mm, and the cup shell height h2 may be between 0.15 mm and 0.18 mm.

Continuing with FIG. 3A , the cup shell 103 has a thickness t1 on the substrate. In some embodiments, the thickness t1 of the cup shell 103 may be between 0.15 mm and 0.20 mm, such as 0.16 mm and 0.19 mm. When the thickness t1 of the cup shell 103 is too large, it may cause increased reflection and shrink the light spot; when the thickness t1 of the cup shell 103 is too small, it may cause abnormal light leakage due to the damage of the cup shell.

Referring to FIG. 3A , the wire structure 104 is disposed on the substrate 101 to connect the light-emitting element 102 to the conductive line layer (not shown) on the substrate 101 to connect the substrate 101 and the light-emitting element 102. In some embodiments, the wire structure 104 includes one or more wires. In some embodiments, the material of the wire may include aluminum (Al), copper (Cu), tungsten (W), their respective alloys, other appropriate conductive materials, or a combination thereof. In some embodiments, the vertical distance between at least a portion of the wire structure 104 and the upper surface 101t of the substrate is greater than the height h2 of the cup 103, that is, the wire structure 104 has a portion that is farther from the substrate 101 than the cup top surface 103t. Specifically, in some embodiments, the metal wire included in the conductive wire structure 104 has an arc structure. The arc structure has a highest point P1 on the substrate 101 . A vertical distance h3 from the highest point P1 to the substrate upper surface 101 t is greater than a height h2 of the cup 103 .

Referring to FIG. 3A , the lens structure 105 is disposed on the substrate 101 to cover the light-emitting element 102, the cup shell 103, and the wire structure 104. In some embodiments, a dispensing process may be used to dispense glue on the substrate 101 to cover the light-emitting element 102 to form the lens structure 105. In some embodiments, the material of the lens structure 105 may include an organic compound composed of silicon, carbon, and oxygen or other suitable transparent packaging materials, but the present disclosure is not limited thereto. In some embodiments, the material of the lens structure 105 may be silicone, but the present disclosure is not limited thereto. In some embodiments, the material of the lens structure 105 may be silicone, but the present disclosure is not limited thereto. In some embodiments, trisiloxane may be added to the lens structure 105, and the concentration of trisiloxane is between 16% and 23%. In some embodiments, the concentration of trisiloxane may be 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%. In some embodiments, the lens structure 105 may be a convex lens, but the disclosure is not limited thereto. In some embodiments, the lens structure 105 may be in a shape having an arc-shaped surface. In some embodiments, the lens structure 105 may be in a shape having a semi-sphere or a semi-elliptical sphere. In some embodiments, when observed from the centerline cross-sectional view, the bottom of the lens structure 105 has a groove around it. In some embodiments, when viewed from the top, the bottom of the lens structure 105 has an annular groove around it. In some embodiments, the cup 103 is accommodated in the groove around the bottom of the lens structure 105. In some embodiments, when viewed from the top, the cup 103 is annularly surrounding the substrate 101. In such an embodiment, when viewed from the centerline cross-sectional view, the cup 103 has a trapezoidal shape in the cross-sectional view, as shown in FIG. 3A.

As shown in FIG. 3A , in some embodiments, the portion of the lens structure 105 that is higher than the top surface 103t of the shell has a thickness t2. In some embodiments, the ratio of the shell height h2 to the thickness t2 (h2/t2) is between 1:3 and 1:5. In some embodiments, the ratio of the shell height h2 to the thickness t2 (h2/t2) is between 1:4 and 1:4.5. When the ratio of the shell height h2 to the thickness t2 of the lens structure 105 (h2/t2) is too large (e.g., greater than 1:2), the light spot of the light source module on the light emitting plane will not be able to diverge; when h2/t2 is too small (e.g., less than 1:6), the pattern of the light spot on the light emitting plane will be deformed (e.g., from a circle to a square). Specifically, in some embodiments, the height h2 of the cup shell 103 may be between 0.13 mm and 0.15 mm and the thickness t2 of the lens structure 105 may be between 0.68 mm and 0.88 mm. From the centerline cross-sectional view of the light source module 100 in FIG. 3A , the side surface of the cup shell 103 and the side surface of the lens structure 105 are discontinuous and have a tilt angle (not shown).

FIG. 3B is a centerline cross-sectional view of the light source module 200 according to other embodiments of the present disclosure. In the embodiment of FIG. 3B, except that the height of the light-emitting surface 102t is the same as the height of the top surface 103t of the shell, the rest is the same as that shown in FIG. 3A, and its description is omitted here for the sake of brevity. Compared with the configuration in the known structure where the shell is higher than the light-emitting surface (for example, as shown in FIG. 1), in some embodiments of the present disclosure as shown in FIG. 3B, by setting the height of the light-emitting surface 102t to be the same as the height of the top surface 103t of the shell, the absorption or reflection of light by the shell can still be reduced and the light output angle of the light source module can be increased. In some embodiments, the refractive index (n value) of the shell 103 can be between 1.53 and 1.56. In some embodiments, the refractive index of the shell 103 may be 1.53, 1.54, 1.55, or 1.56. In some embodiments, the refractive index of the lens structure 105 may be between 1.45 and 1.56. In some embodiments, the refractive index of the lens structure 105 may be 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, or 1.56.

By adjusting the refractive index of the shell 103 and the refractive index of the lens structure 105, the light output angle of the light source module can be further adjusted. In some embodiments, the shell 103 is a semi-transparent material, and the refractive index of the lens structure 105 can be designed to be less than the refractive index of the shell 103, which can further increase the light output angle of the light source module, for example, the refractive index of the lens structure 105 is 1.50 and the refractive index of the shell 103 is 1.53. For example, the refractive index of the lens structure 105 is 1.53 and the refractive index of the shell 103 is 1.56.

FIG. 4 is a schematic diagram of the projection of the light source module of some embodiments of the present disclosure on the light-emitting plane. As shown in FIG. 4, due to the configuration of the light-emitting surface being higher than or flush with the cup shell in some embodiments of the present disclosure, the absorption or reflection of light by the cup shell is reduced, thereby increasing the light-emitting angle of the light source module, and a larger light spot can be generated on the light-emitting plane PS than the existing light source module (adopting the configuration of the light-emitting surface being lower than the cup shell). In this way, the larger light spot of the light source module of the present disclosure can improve the dark area caused by the inability to overlap on the light-emitting plane due to insufficient light spot size in the existing structure (as shown in a in FIG. 4). In addition, the light source module disclosed herein can be configured with a larger pitch (eg, d ₂ > d ₁ ) than existing light source modules without generating dark areas on the light emitting plane, thereby reducing the usage of light source modules and lowering production costs.

Now, the effect of reducing the cup shell height on the spot size is explained by the optical simulation results in Tables 1 and 2 below. Table 1 shows the given conditions of Experimental Examples 1 and 2. Table 2 shows the simulation results of the areas of different spot brightness on the light-emitting plane in Experimental Examples 1 and 2. The "cup height" referred to here is the cup shell height based on the upper surface of the substrate (i.e., the height h2 of the cup shell 103 as shown in FIG. 3A), and the "glue height" is the height of the lens structure exceeding the cup shell (i.e., the thickness t2 of the lens structure 105 as shown in FIG. 3A). Here, the brightness of the brightest point (center point) of the light spot on the light-emitting plane is set as 100% brightness, and the brightness of the rest is based on the brightness of the brightest point in the center as a comparison standard.

As shown in Table 2, compared with the light source module with a higher cup size (0.4 mm), the light source module with a lower cup size (0.2 mm) can increase the area at different brightness levels.

Table 1 Experimental Example 1 Experimental Example 2 Cup height (mm) 0.4 0.2 Rubber height(mm) 0.7 0.9

Table 2 Brightness Area(mm ² ) Experimental Example 1 Experimental Example 2 90% 4.60 5.00 50% 12.3 12.7 10% 28.5 30.0

Now, the following Tables 3 and 4 illustrate the actual observation results of the spot brightness distribution on the light-emitting plane of the light source module with different cup shell heights using a CCD (Charge Coupled Device) image sensor. Table 3 is the given conditions of Experimental Examples 3 to 7. Table 4 is the observation result of the area of different spot brightness on the light-emitting plane in Experimental Examples 3 to 7. The definitions of "cup height" and "glue height" referred to here are the same as those used in the above simulation and will not be elaborated here. Here, the brightness of the brightest spot (center point) on the light-emitting plane is set as 100% brightness, and the brightness of the rest is compared with the brightness of the brightest point.

As shown in the results in Table 4, compared with the group with the luminous surface lower than the shell, the group with the luminous surface higher than the shell can improve all the brightness areas under the same light intensity. In addition, under the same light intensity, the unit area brightness of the group with the luminous surface higher than the shell is also significantly lower than that of the group with the luminous surface lower than the shell, indicating that the configuration with the luminous surface higher than the shell can more effectively disperse light to a larger area, and therefore has a lower unit area brightness under the same light intensity.

Table 3 Experimental Example 3 Experimental Example 4 Experimental Example 5 Experimental Example 6 Experimental Example 7 Cup height (mm) 0.45 0.45 0.15 0.15 0.15 Rubber height(mm) 0.68 0.67 0.76 0.82 0.87 Light emitting surface height (mm) 0.16 0.16 0.16 0.16 0.16

Table 4 Brightness Area(mm ² ) Experimental Example 3 Experimental Example 4 Experimental Example 5 Experimental Example 6 Experimental Example 7 90% 11.93 14.14 14.49 15.83 16.83 60% 24.37 26.04 27.19 29.43 30.03 50% 28.52 30.03 31.17 33.51 34.11 40% 32.79 34.61 35.85 38.09 38.89 10% 60.83 62.40 65.73 67.97 68.72 Brightness per unit area (cd/m ² ) 424.45 416.60 340.73 318.50 317.84

FIG. 5 is a schematic diagram of a light source module according to an embodiment of the present disclosure being applied to a backlight module. As shown in FIG. 5, in some embodiments, the backlight module may include a light source module (e.g., light source module 100), a carrier substrate 201, a diffusion plate 202, and a light color conversion structure 203. FIG. 5 is only an example, and the light source module of the present disclosure may also be applied to various backlight modules that are well known to a person of ordinary skill in the art.

As shown in FIG. 5 , a plurality of light source modules 100 may be arranged on a carrier substrate 201 to form a light-emitting board to provide backlight. In some embodiments, the carrier substrate 201 may be a printed circuit board (PCB) or a substrate made of glass, ceramic, polymer (such as polyimide, polymethyl methacrylate) or the like with wiring, but the present disclosure is not limited thereto. In some embodiments, the light source module 100 is a monochromatic light source. The light source module 100 may adopt a blue or other color (for example, red, green) light source module according to design requirements, and the number of light source modules may also be adjusted according to actual product requirements.

As shown in FIG. 5 , a light diffusion structure 202 may be further disposed above the light emitting plate. The light diffusion structure 202 may improve the uniformity of light distribution by refracting and reflecting the light emitted by the light emitting plate. In some embodiments, the light diffusion structure 202 may be a single-layer or multi-layer structure according to design requirements. For example, the light diffusion structure 202 may include a particle diffusion plate and/or a diffusion film with a microstructure (not shown), but the present disclosure is not limited thereto.

As shown in FIG. 5 , a light color conversion structure 203 may be further provided above the light emitting plate. The light color conversion structure 203 includes light conversion materials of different colors to convert the light emitted by the light source module 100 into different colors. For example, in some embodiments where the light source module 100 is a blue light source, the light color conversion structure 203 may include a red light conversion material and a green light conversion material, wherein the red light conversion material and the green light conversion material may absorb part of the blue light emitted by the light source module 100 and convert it into red light and green light respectively, and the converted red light, green light and part of the blue light are mixed into white light. In some embodiments, the light color conversion structure 203 may be a quantum dot film. In some embodiments, the light color conversion structure 203 may be a yellow quantum dot film. In some embodiments, the light color conversion structure 203 may be a red and green quantum dot film. In some embodiments, the light color conversion structure 203 may include red quantum dots and green quantum dots.

In some embodiments, the yellow light conversion material may include yellow quantum dots or yellow fluorescent powder. For example, the yellow light conversion material may include yttrium aluminum garnet (YAG) fluorescent powder. In some embodiments, the red light conversion material may be red quantum dots or red fluorescent powder, such as (Sr,Ca)AlSiN ₃ :Eu ²⁺ , Ca ₂ Si ₅ N ₈ :Eu ²⁺ , Sr(LiAl ₃ N ₄ ):Eu ²⁺ , manganese-doped red fluoride fluorescent powder (e.g., K ₂ GeF ₆ :Mn ⁴⁺ , K ₂ SiF ₆ :Mn ⁴⁺ , K ₂ TiF ₆ :Mn ⁴⁺ ), etc., but the present disclosure is not limited thereto. In some embodiments, the green light conversion material may be green quantum dots or green fluorescent powder, such as LuAG fluorescent powder, YAG fluorescent powder, β-SiAlON fluorescent powder, silicate fluorescent powder, but the present disclosure is not limited thereto. In some embodiments, the light color conversion structure 203 may be yellow fluorescent powder. For example, the yellow fluorescent powder may be YAG fluorescent powder. In some embodiments, the light color conversion structure 203 may include green fluorescent powder and red fluorescent powder. For example, the light color conversion structure 203 may include green SiAlON fluorescent powder and red K ₂ SiF ₆ :Mn ⁴⁺ . In some embodiments, the light color conversion structure 203 may include a green phosphor and a combination of two red phosphors. For example, the light color conversion structure 203 may include green SiAlON phosphor, red K ₂ SiF ₆ :Mn ⁴⁺ and red (Sr,Ca)AlSiN ₃ :Eu ²⁺ .

In summary, the present disclosure provides a light source module that can be applied to the backlight of a display, a variety of light-emitting devices, etc. Compared with the configuration of the existing structure in which the light-emitting surface is lower than the cup shell, the light source module provided by the present disclosure adopts a configuration in which the light-emitting surface is higher than the cup shell, which reduces the reflection or absorption of the light emitted by the light source by the packaging material layer or the cup shell and effectively increases the light output angle of the light source module. In this way, the light spot generated by the light source module on the light output plane is enlarged, and when the pitch between the light source modules is larger, the uneven brightness of the continuous light spots on the light output plane is reduced. In addition, the light source module provided by the present disclosure can also reduce the use of light-emitting diodes, thereby reducing the manufacturing cost.

Although the present disclosure has been disclosed as above with specific preferred embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the scope defined by the attached patent application.

100: light source module 101: substrate 101t: upper surface of substrate 102: light emitting element 102t: light emitting surface 103: cup shell 103t: upper surface of cup shell 104: wire structure 105: lens structure 200: light source module 201: carrier substrate 202: diffusion plate 203: light color conversion structure h1: distance h2: distance h3: distance t1: thickness t2: thickness P1: highest point S: substrate L: light emitting element P: light emitting surface C: cup shell d1: pitch d2: pitch PS: light emitting plane D: area a: area

The following will be described in detail with the accompanying drawings. It should be noted that, according to standard practices in the industry, various features are not drawn to scale and are only used for illustration. In fact, the size of the components can be arbitrarily enlarged or reduced to clearly show the features of the embodiments of the present invention. Figure 1 is a centerline cross-sectional view of the existing light source module structure. Figure 2 is a schematic diagram of the projection of the existing light source module structure on the light output plane. Figure 3A is a centerline cross-sectional view of the light source module 100 according to some embodiments of the present disclosure. Figure 3B is a centerline cross-sectional view of the light source module 200 according to other embodiments of the present disclosure. Figure 4 is a schematic diagram of the projection of the light source module on the light output plane according to some embodiments of the present disclosure. Figure 5 is a schematic diagram illustrating some embodiments of the light source module being applied to the backlight module according to an embodiment of the present disclosure.

100: Light source module 101: Substrate 101t: Substrate upper surface 102: Light-emitting element 102t: Light-emitting surface 103: Shell 103t: Shell upper surface 104: Wire structure 105: Lens structure h1: Distance h2: Distance h3: Distance t1: Thickness t2: Thickness P1: Highest point

Claims (10)

A light source module comprises: a substrate; a light-emitting element disposed on the substrate and having a light-emitting surface; a cup shell disposed on the substrate and having a top surface, the cup shell being disposed around the light-emitting element to form a containing space, wherein the vertical distance from the light-emitting surface of the light-emitting element to the substrate is greater than or equal to the vertical distance from the top surface of the cup shell to the substrate; and A lens structure is disposed on the substrate and covers the light-emitting element and the cup shell, wherein the refractive index of the lens structure is less than the refractive index of the cup shell, and in a cross-sectional view, the cup shell has a trapezoidal shape, and wherein the side surface of the cup shell is discontinuous with the side surface of the lens structure and has a tilt angle. The light source module of claim 1 further includes a wire structure disposed on the substrate, the wire structure connecting the substrate and the light-emitting element, wherein at least a portion of the wire structure is farther away from the substrate than the top surface of the cup shell. A light source module as claimed in claim 2, wherein the wire structure includes at least one metal wire, the metal wire has an arc structure, wherein the vertical distance from a highest point of the arc structure on the substrate to the substrate is greater than the vertical distance from the top surface of the cup shell to the substrate. A light source module as claimed in claim 1, wherein the refractive index of the cup shell is between 1.53 and 1.56 and the refractive index of the lens structure is between 1.45 and 1.56. A light source module as claimed in claim 1, wherein the lens structure comprises a convex lens, and the ratio of the thickness of the convex lens on the substrate to the height of the cup shell on the substrate is between 1:3 and 1:5. A light source module as claimed in claim 5, wherein the ratio of the thickness of the convex lens on the substrate to the height of the cup shell on the substrate is between 1:4 and 1:4.5. As in claim 1, the light source module, wherein the thickness of the lens structure is between 0.68 mm and 0.88 mm. As in claim 1, the light source module, wherein the height of the cup shell is between 0.13 mm and 0.15 mm. As in claim 1, the light source module, wherein the light transmittance of the material of the cup shell is between 15% and 50%. As in claim 1, the light source module, wherein the thickness of the cup shell is between 0.15 mm and 0.20 mm.

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