KR20160080082A - Flash lens for mobile device - Google Patents

Flash lens for mobile device Download PDF

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Publication number
KR20160080082A
KR20160080082A KR1020150186694A KR20150186694A KR20160080082A KR 20160080082 A KR20160080082 A KR 20160080082A KR 1020150186694 A KR1020150186694 A KR 1020150186694A KR 20150186694 A KR20150186694 A KR 20150186694A KR 20160080082 A KR20160080082 A KR 20160080082A
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KR
South Korea
Prior art keywords
lens body
lens
substrate
reflector
flash
Prior art date
Application number
KR1020150186694A
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Korean (ko)
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KR101826839B1 (en
Inventor
방연호
서유진
Original Assignee
주식회사 아모센스
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Application filed by 주식회사 아모센스 filed Critical 주식회사 아모센스
Publication of KR20160080082A publication Critical patent/KR20160080082A/en
Application granted granted Critical
Publication of KR101826839B1 publication Critical patent/KR101826839B1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2215/00—Special procedures for taking photographs; Apparatus therefor
    • G03B2215/05—Combinations of cameras with electronic flash units
    • G03B2215/0564—Combinations of cameras with electronic flash units characterised by the type of light source
    • G03B2215/0567—Solid-state light source, e.g. LED, laser

Abstract

The present invention relates to a flash lens capable of minimizing optical loss of light emitted from a light source included in a flash of a portable terminal and transmitting the light to the outside. A flash lens of the present invention for this purpose comprises a lens body which transmits light emitted from a light source coupled to a substrate and transmits the light to the outside; And a reflector part coupled to the outer peripheral part of the lens body and reflecting the light emitted from the light source to the space between the substrate and the case spaced apart from the substrate, to the lens body.

Description

FIELD LENS FOR MOBILE DEVICE

The present invention relates to a flash lens, and more particularly, to a flash lens capable of minimizing optical loss of light emitted from a light source included in a flash of a portable terminal and transmitting the light to the outside.

In recent years, as the use of portable terminals has increased and users' demands have diversified, portable terminal technology is being developed in a direction to miniaturize the portable terminal while mounting various functions.

In particular, the camera function of the portable terminal is now an essential function, not an add-on function. As the camera module has become smaller and smaller due to the recent breakthrough in camera technology, it is able to meet the needs of the user.

In the case of a camera module mounted on a portable terminal, a camera module including a lens module and an image pickup element is mounted on one surface of a portable terminal such as a cellular phone or a PDA. In the periphery of the camera module, a flash module for irradiating light forward is disposed.

Accordingly, it is possible to obtain a clear and high quality image by using the flash module when photographing at night or in a dark room, and it is also possible to use it as a light at night, thereby providing convenience to the user. In the case of such a flash module, various target specifications such as the uniformity of the central altitude value and the ambient illuminance, the chromaticity deviation, the CCT deviation, etc., are used to illuminate the light generated from the light source (for example, LED) Lt; / RTI > In order to meet such a target specification, as shown in Fig. 6, a lens 13 for transmitting light generated in the flash module 30 is separately designed and applied.

Here, the light source included in the flash module 30 may be a single LED module, an LED module, or the like. However, in the case of the light emitted from the flash module 30, there is a case where the light is directed to the surface of the case 12 without being transmitted to the lens 13, as indicated by an arrow in FIG. In this case, the light generated from the flash module 30 is directed to the case 12, so that all the lights emitted to the case 12 are not transmitted to the outside, which causes a problem of increasing optical loss.

Therefore, a demand for a new lens structure capable of minimizing the above-described optical loss is increasing.

Korean Registered Patent No. 2010-0082606 (name: camera flash lens and portable device including the same)

An object of the present invention is to provide a flash lens capable of minimizing light loss of light emitted from a light source of a flash module.

According to an aspect of the present invention, there is provided a flash lens comprising: a lens body that transmits light emitted from a light source coupled to a substrate and transmits the light to the outside; And a reflector part coupled to the outer peripheral part of the lens body and reflecting the light emitted from the light source to the space between the substrate and the case spaced apart from the substrate, to the lens body.

Further, the lens body may be fixedly coupled to the through hole formed in the case, and a step may be formed such that the lower portion of the through hole is wider than the upper portion of the through hole.

Further, the width of the upper portion of the lens body is narrower than the width of the lower portion of the lens body, and the upper portion of the lens body can contact the upper inner surface of the through hole.

Further, the upper outer surface of the reflector portion can contact the lower inner surface of the through hole.

Further, when the lens body is coupled to the through-hole, the upper surface of the lens body and the upper surface of the case may be planar.

Further, the reflector portion may be coupled to the outer peripheral portion of the side surface of the lens body through double injection.

Further, the light source further includes a Fresnel pattern portion formed inside the lower surface of the lens body, and the light reflected through the reflector portion may be reflected to the Fresnel pattern portion.

Further, the lower portion of the reflector portion extends in the direction of the substrate, and the lower portion of the reflector portion can be separated from the upper portion of the substrate, or can contact the upper portion of the substrate.

According to the flash lens of the present invention, when a flash function is used in a portable terminal, light generated from a light source is transmitted to a lens body through a reflector portion, thereby minimizing optical loss.

Further, according to the flash lens of the present invention, since the reflector portion is fixed to the lens body through the double injection, a separate fixing member for fixing the lens body and the reflector portion is not required, thereby minimizing the volume of the flash lens There are advantages.

According to the flash lens of the present invention, since the upper surface of the flash lens and the upper surface of the case are flat, the upper portion of the flash lens does not protrude to the outside, and thus the situation where the flash lens is affected by external impact There is an advantage that it can be reduced.

1 is a perspective view of a portable terminal to which a flash lens according to an embodiment of the present invention is applied.
2 is a perspective sectional view of a flash lens according to an embodiment of the present invention;
3 is a conceptual view for explaining an example of coupling a flash lens to a case according to an embodiment of the present invention;
4 and 5 are conceptual diagrams illustrating an example in which a flash lens according to an embodiment of the present invention is coupled to a case;
6 is a conceptual diagram of a flash module according to the prior art;

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, the flash lens 100 according to the embodiment of the present invention will be described. The flash lens 100 according to an embodiment of the present invention can be applied to a portable terminal 10 including a camera 11 and a flash module, as shown in FIG. Also, as will be described below, the flash lens 100 according to an embodiment of the present invention can be coupled to the case 12 and transmit the light emitted from the flash module to the outside. Accordingly, a high-quality photographed image can be obtained even in a dark environment such as at night. The structure for the flash lens 100 according to an embodiment of the present invention is shown in Fig.

2 is a perspective sectional view of a flash lens 100 according to an embodiment of the present invention. 3 is a conceptual diagram for explaining an example of coupling the flash lens 100 to the case 12 according to an embodiment of the present invention.

2, the flash lens 100 according to an exemplary embodiment of the present invention includes a lens body 110, a reflector unit 130, and a fresnel pattern unit 150 formed on a lower surface of the lens body 110 And the like.

The lens body 110 is installed in the through hole 14 of the case 12 and condenses light emitted from a light source (not shown) coupled to the substrate and transmits the condensed light to the outside . For this, the lens body 110 may be made of a synthetic resin such as polycarbonate or PMMA (poly methyl methacrylate), and may be made of transparent or semitransparent material.

2 and 3, the lens body 110 has a shape in which the upper portion 120 protrudes, and the upper surface of the upper portion 120 of the lens body 110 and the upper surface of the lens body 110 A step 140 is formed between the upper surfaces of the lower portions of the first substrate 110. [ Specifically, the upper portion 120 of the lens body 110 may have a protruding shape with respect to the lens body 110, and the width of the upper portion 120 of the lens body 110 may be narrower than the width of the lower portion. have.

3, the step 14b may be formed in the through hole 14 of the case 12 such that the lower portion is wider than the upper portion. Here, the width of the upper portion of the through hole 14 and the width of the upper portion of the lens body 110 may be the same or substantially similar. The lens body 110 of the present invention can be fixed to the case 12 by fitting the upper portion of the lens body 110 to the upper portion of the through hole 14 upwardly in the downward direction as shown in FIG. have.

When the lens body 110 is coupled to the coupling hole 14 of the case 12, the upper surface of the lens body 110 is flush with the upper surface of the case 12. The reason why the upper surface of the lens body 110 and the upper surface of the case 12 are designed to be planar is that when the upper portion of the lens body 110 protrudes on the case 12, In addition, there is a high risk of damage to the upper surface of the lens body 110, such as gas, during actual use. Accordingly, the flash lens 100 according to the embodiment of the present invention can be designed so that the lens body 110 does not protrude out of the case 12 in consideration of the above-mentioned disadvantages.

The reflector 130 may be coupled to the outer periphery of the lens body 110. The reflector 130 reflects the light emitted from the light source toward the case 12, that is, the light emitted to the space between the case 12 and the substrate, to the lens body 110. 2 and 3, the reflector unit 130 may be coupled to the outer peripheral portion of the side surface of the lens body 110 and extend in the direction of the substrate. Also, the reflector unit 130 may be made of a highly reflective material to perform the above-described reflection function.

In the case of the conventional flash lens, as described with reference to FIG. 6, the light generated from the light source is emitted between the case 12 and the substrate 20, resulting in a large optical loss. On the other hand, the flash lens 100 according to the embodiment of the present invention minimizes such light loss through the reflector part 130 and forms the reflector part 130 so as to cover all the emission range of the light source, As shown in FIG.

Further, the reflector portion 130 and the substrate may be configured to be in contact with each other, or spaced apart from each other. For example, when the lower surface of the reflector part 130 contacts the upper surface of the substrate, the reflector part 130 can serve as a support between the case 12 and the substrate, This is possible.

On the other hand, when the case 12 is made of a material having low strength such as plastic or the like, pressing or the like may occur in the portable terminal in actual use. For example, in a structure in which the lower surface of the reflector portion 130 is in contact with the upper surface of the substrate, when the portable terminal is pressed or the like due to an external force, a situation may occur in which the reflector portion 130 is broken due to external force . Accordingly, a method in which the lower surface of the reflector portion 130 and the upper surface of the substrate are spaced apart by a predetermined interval may be considered. However, if the distance between the lower surface of the reflector unit 130 and the upper surface of the substrate is too far, the reflectance of light emitted from the light source may be lowered. Therefore, both the range of light emitted from the light source and the degree of pressing It is desirable to set the interval by considering the above-mentioned interval. Therefore, it is desirable to design the reflector unit 130 and the substrate so that the reflector unit 130 and the substrate are in contact with or spaced apart from each other in consideration of the material of the case, that is, the degree of pressing of the case due to external force.

When the flash lens 100 is coupled to the case 12, the reflector portion 130 contacts the lower inner surface of the through hole 14 with the upper outer surface, 12). That is, since the flash lens 100 according to the embodiment of the present invention is fitted to the inner surface of the reflector part 130 as well as the upper part of the lens body 110, the reflector part 130 is fixed to the case 12 . The bottom width of the case 12 may be equal to the sum of the width of the lower portion of the lens body 110 and the width of the reflector portion 130 for the fixing function described above.

Here, the flash lens 100 according to an embodiment of the present invention may form the lens body 110 and the reflector unit 120 through double injection. That is, the flash lens 100 according to an embodiment of the present invention can be manufactured in a state where the lens body 110 and the reflector unit 120 are combined by simultaneously injecting a transparent material and a highly reflective material. Accordingly, the flash lens 100 according to an embodiment of the present invention has an advantage of not requiring an additional adhesive layer or a coupling member for fixing the lens body 110 and the reflector part 120 have. In addition, since the flash lens 100 according to the embodiment of the present invention does not require additional configuration for coupling through double injection, it is possible to reduce the volume increase due to the flash lens when applied to a portable terminal in a recent miniaturization trend There is an advantage not to cause. Of course, the flash lens 100 according to an embodiment of the present invention may be manufactured by injecting the lens body 110 and the reflector part 130, respectively, and bonding them. However, It is more preferable to perform the double injection because of the excellent durability as compared with a system in which adhesion is separately performed after separate injection.

A Fresnel pattern portion 150 formed on the lower surface of the lens body 110 and formed inside may be formed. Accordingly, the light generated from the light source can be condensed to the outside through the Fresnel pattern unit 150 and transmitted. As described above, the flash lens 100 according to an embodiment of the present invention prevents light from being emitted to the case 12 through the reflector unit 130. [ In other words, the light emitted into the space between the case 12 and the substrate can be reflected through the reflector unit 130 and transmitted to the outside through the Fresnel pattern unit 150 described above. Accordingly, the flash lens 100 according to an embodiment of the present invention has an advantage of minimizing light loss.

An example in which the flash lens 100 according to an embodiment of the present invention is applied to a portable terminal is shown in Figs. 4 and 5. Fig. As described above, the flash lens 100 according to an embodiment of the present invention is configured such that the upper portion 120 of the lens body 110 and the outer upper surface of the reflector portion 130 are fitted into the engagement holes of the case 12 As shown in Fig. 4 and 5, the Fresnel pattern portion 150 of the lens body 110 and the flash module 30 may be arranged to face each other, and the Fresnel pattern portion 150 of the lens body 110, The light is condensed through the Fresnel pattern portion 150 and can be emitted to the outside through the lens body 110. 4, the lower portion of the reflector portion 130 and the upper portion of the substrate 20 are shown as being in contact with each other. However, as shown in FIG. 5, It is also possible that the upper portion of the upper portion is spaced apart.

According to the flash lens 100 according to the embodiment of the present invention, as shown by the arrows in FIGS. 4 and 5, the light emitted from the flash module 30 is directly directed to the Fresnel pattern portion 150 Or reflected from the reflector unit 130 coupled to the lens body 110, and is then transmitted to the Fresnel pattern unit 150. This is in contrast to the prior art in which light is emitted toward the substrate 20, and accordingly, the flash lens 100 according to an embodiment of the present invention has an advantage that the optical loss can be greatly reduced as compared with the prior art . According to the flash lens 100 according to the embodiment of the present invention, the light loss is greatly reduced, and the light can be emitted to the outside with higher illuminance and uniformity than the prior art.

As described above, an optimal embodiment has been disclosed in the drawings and specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: flash lens 110: lens body
130: Reflector unit 150: Fresnel pattern

Claims (10)

A lens body that transmits light emitted from a light source coupled to the substrate and transmits the light to the outside; And
And a reflector part coupled to the outer circumferential part of the lens body and reflecting light emitted from the light source to a space between the substrate and the case spaced apart from the substrate by the lens body. . The method according to claim 1,
Wherein the lens body is fixedly coupled to the through hole formed in the case. 3. The method of claim 2,
And a lower portion of the through hole is formed to have a width larger than an upper portion of the through hole. 3. The method of claim 2,
Wherein a width of an upper portion of the lens body is narrower than a width of a lower portion of the lens body, and an upper portion of the lens body is in contact with an upper inner surface of the through hole. 3. The method of claim 2,
And the upper outer surface of the reflector portion is in contact with the lower inner surface of the through hole. 3. The method of claim 2,
Wherein the upper surface of the lens body and the upper surface of the case are flat when the lens body is coupled to the through hole. The method according to claim 1,
Wherein the reflector portion is coupled to a side outer periphery of the lens body through a double injection. The method according to claim 1,
Further comprising a Fresnel pattern portion formed inwardly from a lower surface of the lens body, wherein light reflected through the reflector portion is reflected to the Fresnel pattern portion. The method according to claim 1,
Wherein the lower portion of the reflector portion extends in the direction of the substrate and contacts the upper portion of the substrate. The method according to claim 1,
Wherein a lower portion of the reflector portion extends in the direction of the substrate, and a lower portion of the reflector portion and an upper portion of the substrate are spaced apart from each other.
KR1020150186694A 2014-12-29 2015-12-24 Flash lens for mobile device KR101826839B1 (en)

Applications Claiming Priority (2)

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KR1020140192268 2014-12-29
KR20140192268 2014-12-29

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KR101826839B1 KR101826839B1 (en) 2018-03-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020103507A1 (en) * 2018-11-20 2020-05-28 南昌欧菲生物识别技术有限公司 Projection module, imaging device, and electronic apparatus
US11460893B2 (en) 2018-09-18 2022-10-04 Samsung Electronics Co., Ltd. Electronic device including nonmetallic light guide structure
WO2022225205A1 (en) * 2021-04-21 2022-10-27 삼성전자주식회사 Electronic device comprising flash module and lens assembly molding method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100082606A (en) 2009-01-09 2010-07-19 삼성엘이디 주식회사 Camera flash lens and portable device including the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100082606A (en) 2009-01-09 2010-07-19 삼성엘이디 주식회사 Camera flash lens and portable device including the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11460893B2 (en) 2018-09-18 2022-10-04 Samsung Electronics Co., Ltd. Electronic device including nonmetallic light guide structure
WO2020103507A1 (en) * 2018-11-20 2020-05-28 南昌欧菲生物识别技术有限公司 Projection module, imaging device, and electronic apparatus
WO2022225205A1 (en) * 2021-04-21 2022-10-27 삼성전자주식회사 Electronic device comprising flash module and lens assembly molding method

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