Light-emitting module for flash

Abstract

A light-emitting module for a flash, according to the present invention, comprises: a circuit board; a light-emitting unit mounted on the upper surface of the circuit board; a lens module unit that is disposed above the light-emitting unit and diffuses light emitted from the light-emitting unit; and a housing coupled to the circuit board and the lens module unit and surrounding the light-emitting unit, wherein the the lens module unit and the housing are molded by a double injection method to be coupled to each other, and a side surface of the lens module unit is coupled to a portion of the housing by the double injection method.

Description

Light-emitting module for flash

[0001] The present invention relates to a light-emitting module for flash, and more specifically, to a light-emitting module for flash that can improve the optical performance and appearance quality of LEDs applied to various electronic devices such as smartphones, tablets, and wearable devices.

[0002] Recently, the importance of exterior design, as well as lighting quality, has been emphasized in the electronic device market. Accordingly, flash light-emitting modules are required to incorporate structural improvement technologies to enhance light diffusion efficiency, along with improved exterior quality.

[0003] In conventional technology, as the housing and lens module were manufactured as a single structure using an epoxy clear lens, dark areas formed on the inner surface of the housing, which became a factor degrading the quality of the product's appearance.

[0004] In particular, for electronic devices requiring a premium appearance, such visual defects are becoming a factor that weakens competitiveness.

[0005] The present invention aims to provide a light-emitting module for a flash that improves the diffusion and reflection efficiency of LED light and has an improved appearance.

[0006] The light-emitting module for a flash according to the present invention comprises a circuit board, a light-emitting part mounted on the upper surface of the circuit board, a lens module part disposed above the light-emitting part and diffusing light emitted from the light-emitting part, and a housing that is coupled to the circuit board and the lens module part and surrounds the light-emitting part, wherein the lens module part and the housing are formed by a double injection molding method and joined together, and the side of the lens module part is joined to a part of the housing by the double injection molding method.

[0007] In one embodiment of the present invention, the lens module may be formed of a transparent material, and the housing may be formed of an opaque material.

[0008] In one embodiment of the present invention, the housing may be formed from a material comprising at least one of white polyphthalamide (PPA), polyamide 9T (PA9T), polycyclohexylene dimethylene terephthalate (PCT), liquid crystal polymer (LCP), white silicone, and white epoxy.

[0009] In one embodiment of the present invention, the housing may include titanium dioxide (TiO2).

[0010] In one embodiment of the present invention, the housing includes an opening surrounding the light-emitting part, and the lens module may include a lens part disposed above the light-emitting part and refracting light emitted from the light-emitting part, and an inner coupling part extending downward from the lower surface of the lens part and coupled to the inner circumference of the opening.

[0011] In one embodiment of the present invention, the lens module may further include an outer coupling portion that is spaced apart from the inner coupling portion and coupled to the outer surface of the housing.

[0012] In one embodiment of the present invention, the lens portion and the outer coupling portion are spaced apart from each other, and the upper surface of the housing between the lens portion and the outer coupling portion may be exposed to the outside.

[0013] In one embodiment of the present invention, the housing further includes an opening that opens the opening to the side, and the outer coupling part includes a first outer coupling part connected through a connecting coupling part extending from the inner coupling part, and the connecting coupling part may be coupled to the inner surface of the opening part.

[0014] In one embodiment of the present invention, the outer coupling portion may further include a second outer coupling portion formed separately from the inner coupling portion.

[0015] In one embodiment of the present invention, the first outer coupling part and the second outer coupling part may be positioned facing each other.

[0016] In one embodiment of the present invention, the first outer coupling part and the second outer coupling part are spaced apart from each other, and the outer surface of the housing between the first outer coupling part and the second outer coupling part may be exposed without being coupled to the outer coupling part.

[0017] In one embodiment of the present invention, the inner surface of the opening comprises a first inner surface, a second inner surface formed to protrude laterally from the first inner surface and have a step, and a lower surface connecting the first inner surface and the second inner surface, and the connecting coupling portion comprises a first connecting coupling portion coupled to the first inner surface and a second connecting coupling portion spaced apart from the first connecting coupling portion and coupled to the second inner surface, but may not be coupled to the lower surface.

[0018] In one embodiment of the present invention, a blocking layer may be further included that is coupled to the outer surface of the housing and is formed in a color darker than that of the housing.

[0019] The light-emitting module for a flash according to the present invention includes PPA WHITE with high reflectivity on the inner surface of the housing manufactured by a double injection molding process. As a result, it has the advantage of maximizing luminous efficiency by realizing uniform diffusion of light and elegant reflected light.

[0020] In addition, the light-emitting module for a flash of the present invention has the advantage of providing improved visual quality due to the PPA white on the inner surface of the housing.

[0021] FIG. 1 is a perspective view of a light-emitting module for a flash according to one embodiment of the present invention.

[0022] FIG. 2 is an exploded perspective view of a light-emitting module for a flash according to one embodiment of the present invention.

[0023] FIG. 3 is a cross-sectional view of a light-emitting module for a flash according to one embodiment of the present invention.

[0024] FIG. 4 is a perspective view of a lens module and a housing according to one embodiment of the present invention.

[0025] FIG. 5 is a bottom perspective view of a lens module and a housing according to one embodiment of the present invention.

[0026] FIG. 6 is an exploded perspective view of a lens module and a housing according to one embodiment of the present invention.

[0027] FIG. 7 is a cross-sectional view of a light-emitting module for a flash according to another embodiment of the present invention.

[0028] FIG. 8 is a cross-sectional view of a light-emitting module for a flash according to another embodiment of the present invention.

[0029] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. In describing the present invention, if it is determined that adding specific descriptions of technologies or configurations already known in the field may obscure the essence of the present invention, such details will be partially omitted from the detailed description. Furthermore, the terms used in this specification are used to appropriately express the embodiments of the present invention, and these may vary depending on relevant persons or conventions in the field. Therefore, the definitions of these terms should be based on the content throughout this specification.

[0030] The technical terms used herein are for the reference of specific embodiments only and are not intended to limit the invention. The singular forms used herein include plural forms unless phrases clearly indicate otherwise. The meaning of "comprising" as used in the specification specifies a particular characteristic, area, integer, step, action, element, and / or component, and does not exclude the presence or addition of other particular characteristic, area, integer, step, action, element, component, and / or group.

[0031]

[0032] Hereinafter, a light-emitting module for a flash according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2.

[0033] FIG. 1 is a perspective view of a light-emitting module for a flash according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a light-emitting module for a flash according to one embodiment of the present invention.

[0034] A flash-emitting module of one embodiment can be applied to various electronic devices such as smartphones, tablets, and wearable devices. The flash-emitting module of the present invention is a high-output LED-based light source and can have the function of emitting strong light instantaneously or providing continuous illumination.

[0035] Referring to FIGS. 1 and 2, the light-emitting module for a flash of the present invention includes a circuit board (100), a light-emitting unit (200), a control unit (300), a lens module unit (400), and a housing (500).

[0036] The circuit board (100) constitutes the lower part of the light-emitting module for the flash. The circuit board (100) may be formed as a printed circuit board. The light-emitting part (200) and the control part (300), etc., may be mounted on the circuit board (100).

[0037] The light-emitting unit (200) can be mounted on the upper surface of the circuit board (100). Specifically, the light-emitting unit (200) is directly coupled to the circuit board (100) and driven by an electrical signal transmitted by the circuit board (100). As a result, the light-emitting unit (200) can emit light to perform a lighting or display function.

[0038] The light-emitting part (200) may include a light-emitting element and a phosphor located above the light-emitting element that converts the wavelength of light of the light-emitting element.

[0039] The control unit (300) may be located around the light-emitting unit (200). The control unit (300) may be coupled to the upper surface of the circuit board (100) for current control and signal processing. The control unit (300) is electrically connected to the light-emitting unit (200) and other components to support the operation of the light-emitting unit (200) and to control electrical characteristics.

[0040] The lens module (400) is positioned on the upper part of the light-emitting part (200) and can diffuse the light of the light-emitting part (200). Specifically, the lens module (400) includes a lens part (410), an inner coupling part (420), an outer coupling part (430), and a connecting coupling part (440). The lens module (400) can be inserted into the opening (530) of the housing (500) and coupled with the housing (500). The lens module (400) is made of clear epoxy and can pass light from the light-emitting part (200).

[0041] The housing (500) is combined with the circuit board (100) and the lens module (400) to form an internal space where the light-emitting part (200) is located. Specifically, the housing (500) can surround the light-emitting part (200). Specifically, the housing (500) may be in the form of a case to protect the light-emitting module for the flash. As a result, internal components can be protected from external shocks, dust, and moisture, and the overall structure of the device can be maintained.

[0042] The housing (500) may include an inner surface (510), an outer surface (520), an opening (530), and an opening (540). The housing (500) has an opening (530) formed on its upper surface that surrounds the light-emitting part (200), so that a lens module part (400) can be coupled to the opening (530). The housing (500) is formed of an opaque material so as to block light from the light-emitting part (200) without allowing it to pass through.

[0043] The housing (500) may be formed from a white plastic resin material. Specifically, the housing (500) may be formed from a material comprising at least one of white polyphthalamide (PPA), polyamide 9T (PA9T), polycyclohexylene dimethylene terephthalate (PCT), liquid crystal polymer (LCP), white silicone, and white epoxy. More specifically, the housing (500) may be formed from polyphthalamide to which a white pigment or a high-reflection additive (e.g., TiO2, BaSO₄) has been added. Such white polyphthalamide has a smooth appearance and high reflectivity, which can enhance aesthetic appeal.

[0044] In some cases, a nanoparticle coating layer based on titanium dioxide (TiO2) or barium sulfate (BaSO4) may be additionally applied to the surface of the housing (500). The coating layer may be formed with a thickness of, for example, 5 to 50 μm. This can improve the whiteness and high reflectivity properties.

[0045] In some cases, the housing (500) may be formed from two or more different materials. Even in such cases, the inner surface (510) of the housing (500) may be formed from the aforementioned white plastic resin material. Since the inner surface (510) of the housing (500) is a part that reflects light from the light-emitting part (200) and can be observed from the outside through the lens part (410), it is preferable that it be formed from the aforementioned white plastic resin material.

[0046]

[0047] Hereinafter, a light-emitting module for a flash according to an embodiment of the present invention will be described with reference to FIG. 3.

[0048] FIG. 3 is a cross-sectional view of a light-emitting module for a flash according to one embodiment of the present invention. FIG. 4 is a cross-sectional view of a light-emitting module for a flash according to one embodiment of the present invention.

[0049] Referring to FIG. 3, the lens module (400) and the housing (500) can be injected through a double injection process. Specifically, the housing (500) can be injected first through a first process, and the lens module (400) combined with the housing (500) can be injected through a second process. More specifically, in the second process, the housing (500) can be positioned inside the mold, and a resin material forming the lens module (400) can be injected. Through this, the lens module (400) can be injection molded in a combined state with the housing (500).

[0050] The combined structure of the lens module (400) and the housing (500) will be explained in more detail below.

[0051]

[0052] Hereinafter, a light-emitting module for a flash according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6.

[0053] FIG. 4 is a perspective view of a lens module and a housing according to an embodiment of the present invention. FIG. 5 is a bottom perspective view of a lens module and a housing according to an embodiment of the present invention. FIG. 6 is an exploded perspective view of a lens module and a housing according to an embodiment of the present invention.

[0054] Referring to FIGS. 4 and 5, the lens module part (400) includes a lens part (410), an inner coupling part (420), an outer coupling part (430), and a connecting coupling part (440).

[0055] The lens portion (410) refracts light emitted from the light-emitting portion (200). Specifically, the lens portion (410) may be a Fresnel lens. The lens portion (410), which is a Fresnel lens, can maintain a thin and light structure while having a focusing function similar to a convex lens.

[0056] The inner coupling portion (420) extends downward from the lower surface of the lens portion (410) and is coupled to the inner surface of the opening (530) of the housing (500). The inner surface of the opening (530) may coincide with the inner surface (510) of the housing (500). Thus, the inner coupling portion (420) can be coupled to the inner surface (510) of the housing (500). The inner surface (510) may contain a white polyphthalamide, and the lens module portion (400) may be made of transparent epoxy and be transparent. Therefore, even when the inner surface (510) and the inner coupling portion (420) are coupled, light can pass through the inner coupling portion (420) made of transparent epoxy material and be effectively reflected through the white polyphthalamide of the inner surface (510). In addition, when viewing the flash light-emitting module from the outside, it can be visually evenly visible without dark areas due to the white polyphthalamide.

[0057] The outer coupling portion (430) is spaced apart from the inner coupling portion (420) and can be coupled to the outer surface (520) of the housing (500). The outer coupling portion (430) may include a first outer coupling portion (431) and a second outer coupling portion (432). The first outer coupling portion (431) and the second outer coupling portion (432) may be positioned facing each other. Additionally, the first outer coupling portion (431) and the second outer coupling portion (432) are positioned spaced apart from each other, and the outer surface (520) of the housing (500) between the first outer coupling portion (431) and the second outer coupling portion (432) is exposed and not coupled to the outer coupling portion (430). The outer joint (430) can improve the bonding strength when the lens module (400) and the housing (500) are combined and injected by a double injection method.

[0058] The first outer coupling part (431) is connected through a connecting coupling part (440) extending from the inner coupling part (420). The lens part (410) and the outer coupling part (430) are spaced apart from each other, and the upper surface of the housing (500) between the lens part (410) and the outer coupling part (430) can be exposed to the outside.

[0059] The second outer coupling portion (432) may be formed separately from the inner coupling portion (420). The space between the second outer coupling portion (432) and the inner coupling portion (420) may be located on the side wall of the housing (500).

[0060] The connecting member (440) may be connected to the inner surface of the opening (540). The connecting member (440) includes a first connecting member (441) and a second connecting member (442). The first connecting member (441) is connected to the first inner surface (551). The second connecting member (442) is spaced apart from the first connecting member (441) and is connected to the second inner surface (552). The connecting member (400) is not connected to the lower surface (553).

[0061] When the lens module part (400) is injection molded, the housing (500) may be positioned inside the mold of the lens module part (400). The lens module part (400) may be molded by injecting a resin material into the space surrounding the housing (500) inside the mold. When the housing (500) is positioned inside the mold, some parts of the mold may be in close contact with the outside of the housing (500), while other parts may form a space spaced apart from the housing (500). The lens module part (400) may be injection molded by injecting a resin material into this spaced-apart space.

[0062] Specifically, when the housing (500) is positioned inside the mold, a spaced-apart space is formed on both sides where the first outer coupling part (431) and the second outer coupling part (432) are formed, and the mold is in close contact with the part between the first outer coupling part (431) and the second outer coupling part (432), so that the lens module part (400) may not be formed.

[0063] In a similar manner, the upper and lower surfaces of the housing (500) may also be in close contact with the mold, so that the lens module part (400) covering the upper and lower surfaces of the housing (500) is not formed.

[0064]

[0065] The housing (500) includes an inner surface (510), an outer surface (520), an opening (530), an opening (540), and an inner surface (550).

[0066] The inner surface (510) is joined to the inner joint (420) and may coincide with the inner surface of the opening (530).

[0067] The outer surface (520) may be an outer surface of the housing (500). The outer surface (520) may include a barrier layer (600) formed in a color darker than that of the housing (500). Specifically, the second and fourth surfaces of the outer surface (520) of the housing (500) may be connected to an outer connecting part (430). The first and third surfaces of the outer surface (520) may not be connected to the outer connecting part (430), and the outer surface (520) may be exposed as is.

[0068] The opening (540) opens the opening to the side. It may be formed on at least one of the outer surfaces (520) of the housing (500). For example, it may be the fourth surface.

[0069] The inner surface (550) includes a first inner surface (551), a second inner surface (552), and a bottom surface (553). The first inner surface (551) may be located at the bottom of the housing (500). The second inner surface (552) may be formed to protrude laterally from the first inner surface (551) and be stepped. The bottom surface (553) connects the first inner surface (551) and the second inner surface (552).

[0070] Referring to FIG. 6, the lens module part (400) may further include a protrusion (450). Additionally, the housing (500) may further include a groove (560). Specifically, the protrusion (450) may be located around the opening (530) of the housing (500), and the groove (560) may be formed between the upper surface and the outer surface (520) of the housing (500). The protrusion (450) of the lens module part (400) may engage with the groove (560) of the housing (500) to improve precision and bonding strength during the double injection molding process.

[0071] Hereinafter, a light-emitting module for a flash according to another embodiment of the present invention will be described with reference to FIG. 7.

[0072] Referring to FIG. 4, the blocking layer (600) is bonded to the outer surface (520) of the housing (500) and is formed in a color darker than that of the housing (500). For example, it may be made in black. This prevents light reflected from inside the housing (500) from leaking out and can increase the optical efficiency of the light-emitting module for the flash.

[0073] Specifically, if the inner surface (510) of the housing (500) is formed of a highly reflective material, it effectively reflects light from the light-emitting part (200), but the light shielding ability is relatively reduced, so some of the light from the light-emitting part (200) can pass through the housing (500). Therefore, depending on the case, it is necessary to improve the light shielding ability of the housing (500).

[0074] The blocking layer (600) may be formed in a color darker than the body of the housing (500) so as to absorb light from the light-emitting part (200). Specifically, the blocking layer (600) may be formed from a black resin material. For example, a black coating containing fine particles such as carbon black or iron oxide (Fe2O3) may be applied. The material of such a blocking layer provides a high light absorption rate, which can prevent unnecessary light leakage.

[0075] This blocking layer (600) is bonded to the outer surface (520) of the housing (500). Since the outer surface (520) of the housing (500) is not a part that is observed from the outside through the lens portion (410), unlike the inner surface (510) of the housing (500), there may be less need for it to be formed in a white color.

[0076]

[0077] Hereinafter, a light-emitting module for a flash according to another embodiment of the present invention will be described with reference to FIG. 8.

[0078] FIG. 8 is a cross-sectional view of a light-emitting module for a flash according to another embodiment of the present invention.

[0079] Referring to FIG. 8, the flash light-emitting module of the present invention includes a circuit board (100), a light-emitting unit (200), a control unit (300), a lens module unit (400), a housing (500), and a film unit (700).

[0080] The film portion (700) may be composed of silicon + SiO2. The ratio of silicon to SiO2 in the film portion (700) may be 50 to 200%. By using silicon as the base material and adhesive component, stable and consistent performance can be maintained even in high-temperature environments. Additionally, the thickness of the film portion (700) can be optimized to 100 to 300 μm to minimize light transmission loss.

[0081] The film portion (700) can be located on the upper surface of the light-emitting portion (00) and the control portion (300). Conventional LED devices have a limitation in that the yellow light of the phosphor material inside the light-emitting portion (200) is exposed to the outside. To compensate for this, films (710, 720) can be attached to the upper surface of the light-emitting portion (200) and the control portion (300). As a result, when viewing the light-emitting module for a flash from the outside, a light-emitting module for a flash adjusted to a white tone can be provided.

[0082] Specifically, the silicon + SiO2 white film (710) attached to the upper surface of the light-emitting part (200) may be positioned to wrap around the light-emitting part (200) to provide improved visual quality. Additionally, the silicon + SiO2 white film (710) attached to the upper surface of the light-emitting part (200) may have a length of L2. The length (L2) of the film (710) may be longer than the length of the light-emitting part (200). A lens module (400) may be positioned on the upper surface of the film (710). The center point (C) of the lens module (400) may coincide with the center point of the film (710) and the light-emitting part (200). A groove (not shown) may be formed on the inner surface of the lens module (400) located opposite the film (710). The length of the groove (not shown) on the inner surface of the lens module (400) may be L1. The length (L2) of the light-emitting film (710) may be longer than the length (L1) of the inner surface groove (not shown) of the lens module (400).

[0083] The film (70) can be combined in a structure that covers the upper surface of the control unit (300). Specifically, the control unit (300) located around the light-emitting unit (200) may have a visual defect that appears as a dark area. Therefore, by attaching the film (720) to the upper surface of the control unit (300), the LED device can be uniformly adjusted to a white tone.

[0084] A film (720) attached to the upper surface of a control unit (300) may be positioned to wrap around the control unit (300) to provide improved visual quality. Specifically, the film (720) attached to the upper surface of the control unit (300) may have a length of L3. The length (L3) of the film (720) may be longer than the length of the control unit (300). Additionally, the length (L2) of the light-emitting unit film (710) may be longer than the length (L3) of the control unit film (720).

[0085] The film portion (700) can be closely attached along the shape of the light-emitting portion (200) and the control portion (300). As a result, the surface of the light-emitting portion (200) and the control portion (300) can be adjusted to a white tone to provide improved visual quality.

[0086]

[0087] The technical features disclosed in each embodiment of the present invention are not limited to that embodiment only, and as long as they are not mutually incompatible, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

[0088] Therefore, in each embodiment, the technical features are described primarily, but as long as the technical features are not mutually incompatible, they may be combined and applied together.

[0089] The present invention is not limited to the embodiments described above and the attached drawings, and various modifications and variations may be possible from the perspective of those skilled in the art to which the present invention belongs. Accordingly, the scope of the present invention should be defined not only by the claims of this specification but also by equivalents thereof.

Claims

1. Circuit board; A light-emitting part mounted on the upper surface of the above circuit board; A lens module portion disposed above the light-emitting portion and diffusing light emitted from the light-emitting portion; and It includes a housing that is coupled to the circuit board and the lens module and surrounds the light-emitting part, and The lens module and the housing are formed by double injection molding and joined together, wherein the side of the lens module is joined to a part of the housing by the double injection molding. Light-emitting module for flash.

2. In Paragraph 1, The above lens module is formed of a transparent material, and The above housing is formed of an opaque material. Light-emitting module for flash.

3. In Paragraph 2, The above housing is formed of a material comprising at least one of white polyphthalamide (PPA), polyamide 9T (PA9T), polycyclohexylene dimethylene terephthalate (PCT), liquid crystal polymer (LCP), white silicone, and white epoxy. Light-emitting module for flash.

4. In Paragraph 3, The above housing comprises titanium dioxide (TiO2). Light-emitting module for flash.

5. In Paragraph 1, The above housing includes an opening surrounding the light-emitting part, and The above lens module is, A lens portion disposed above the light-emitting portion and refracting light emitted from the light-emitting portion; and Includes an inner coupling portion extending downward from the lower surface of the lens portion and coupled to the inner circumference of the opening. Light-emitting module for flash.

6. In Paragraph 5, The above lens module is, It further includes an outer coupling part that is spaced apart from the inner coupling part and coupled to the outer surface of the housing. Light-emitting module for flash.

7. In Paragraph 6, The lens portion and the outer coupling portion are spaced apart from each other, The upper surface of the housing between the lens portion and the outer coupling portion is exposed to the outside. Light-emitting module for flash.

8. In Paragraph 7, The above housing further includes an opening that opens the above opening to the side, and The above outer coupling part includes a first outer coupling part connected through a connecting coupling part extended from the inner coupling part, and The above connecting joint is coupled to the inner surface of the above opening Light-emitting module for flash.

9. In Paragraph 8, The above outer coupling part further includes a second outer coupling part formed separately from the inner coupling part. Light-emitting module for flash.

10. In Paragraph 9, The first outer coupling part and the second outer coupling part are positioned facing each other. Light-emitting module for flash.

11. In Paragraph 10, The first outer coupling part and the second outer coupling part are spaced apart from each other, and The outer surface of the housing between the first outer coupling part and the second outer coupling part is exposed and not coupled to the outer coupling part. Light-emitting module for flash.

12. In Paragraph 7, The inner surface of the above-mentioned opening is, First inner surface; A second inner surface formed with a step, protruding laterally from the first inner surface; and It includes a lower surface connecting the first inner surface and the second inner surface, and The above connecting joint is, A first connecting member coupled to the first inner surface; and A second connecting member spaced apart from the first connecting member and coupled to the second inner surface, but not coupled to the lower surface Light-emitting module for flash.

13. In Paragraph 1, A blocking layer further comprising a layer coupled to the outer surface of the housing and formed in a color darker than that of the housing. Light-emitting module for flash.

Images