KR20110037623A - Preform structure, and apparatus for manufacturing the same - Google Patents

Abstract

PURPOSE: A pre-form structure and an apparatus for manufacturing the same are provided to effectively process a gas between a mold and a pre-form and increase the precision of the array lens manufacturing process. CONSTITUTION: A pre-form structure(100) includes a lens forming part, a scribe part(120), and a gas processing part. The lens forming part corresponds to the lens forming side of the mold for manufacturing an array lens. The scribe part is an area around the lens forming part. The gas processing part induces gas between the lens forming part and the lens forming side to the scribe part.

Description

Preform structure and apparatus for manufacturing thereof {PREFORM STRUCTURE, AND APPARATUS FOR MANUFACTURING THE SAME}

The present invention relates to a preform structure, and more particularly, to a preform structure and an apparatus for manufacturing the same to improve the manufacturing efficiency of the array lens.

In general, an array lens applied to a camera module is manufactured by processing a preform structure. Normally, the preform structure is manufactured by an injection molding method called hot-forming, and the preform structure is processed into a predetermined mold to manufacture an array lens. However, in the method of manufacturing the array lens as described above, it is difficult to effectively discharge gas generated between the mold and the preform structure in the process of processing the preform structure into the mold. When gas is left between the mold and the preform structure when the array lens is manufactured, voids may be generated inside the manufactured array lens or the shape of the array lens may be deformed.

The problem to be solved by the present invention is to provide a preform structure for manufacturing an array lens having a high precision.

SUMMARY OF THE INVENTION An object of the present invention is to provide a preform structure for manufacturing an array lens, which effectively processes a gas between a mold and a preform when manufacturing an array lens, thereby improving the manufacturing efficiency of the array lens.

An object of the present invention is to provide a preform structure manufacturing apparatus for manufacturing an array lens having a high precision.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for manufacturing a preform structure in which the gas between a mold and a preform is effectively processed during array lens manufacturing, thereby improving the manufacturing efficiency of the array lens.

The preform structure according to the present invention includes a lens forming portion corresponding to a lens forming surface of a mold for manufacturing an array lens, a scribe portion which is an area other than the lens forming portion, and a gas between the lens forming surface and the lens forming portion. And a gas processing unit for guiding the lens forming unit to the scribe unit.

According to an embodiment of the present invention, the gas processing unit may include a depression formed in the scribe unit adjacent to the lens forming unit.

According to the exemplary embodiment of the present invention, the gas processing part may include at least one hole formed in the scribe part adjacent to the lens forming part.

According to an embodiment of the present invention, the gas processing part is provided with a depression provided along an area adjacent to the lens forming part and a depression provided with any one of the lens forming part and the depression provided with the other lens forming part. It may include a connecting portion for connecting the portion.

According to an embodiment of the present invention, the lens forming surface may be any one of a spherical surface and an aspherical surface.

According to an embodiment of the present invention, the lens forming portion has a curved surface convex toward the mold, the curvature of the lens forming portion may be smaller than the lens forming surface of the mold.

According to an embodiment of the present invention, the lens forming portion has a concave curved surface toward the mold, the curvature of the lens forming portion may be larger than the lens forming surface of the mold.

The apparatus for manufacturing a preform structure according to the present invention includes a lens forming portion corresponding to a lens forming surface of a mold for manufacturing an array lens, a scribe portion which is an area other than the lens forming portion, and a gas between the lens forming surface and the lens forming portion. It includes a mold having a cavity of a shape corresponding to the preform structure including a gas treatment unit to guide from the lens forming portion to the scribing portion.

The preform structure according to the present invention includes a gas treatment part for inducing a gas between the preform structure and the mold from the lens forming region to the scribe region in the process of being processed into a mold, thereby preventing deformation and contamination of the lens forming region by the gas. can do. Accordingly, the preform structure according to the present invention can improve the manufacturing efficiency of the array lens.

The apparatus for manufacturing a preform structure according to the present invention includes a gas processing unit for guiding a gas between the preform structure and the mold from the lens forming region to the scribe region in the process of being processed into a mold, and deforming and contaminating the lens forming region by the gas. It is possible to manufacture a preform structure that can prevent. Accordingly, the preform structure manufacturing apparatus according to the present invention can manufacture a preform structure that can improve the manufacturing efficiency of the array lens.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The embodiments may be provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is to be understood that the terms 'comprise', and / or 'comprising' as used herein may be used to refer to the presence or absence of one or more other components, steps, operations, and / Or additions.

Hereinafter, a preform structure and an apparatus for manufacturing the preform structure according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view showing a preform structure according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II 'shown in FIG. And, Figure 3 is a view showing a preform structure manufacturing apparatus according to an embodiment of the present invention.

1 and 2, the preform structure 100 according to the embodiment of the present invention may be divided into a lens region A and a scribe region B. FIG. The preform structure 100 may include a lens forming unit 110 provided in the lens region A, a scribe unit 120 provided in the scribe region B, and the scribe generally adjacent to the lens forming unit 110. It may include a gas processing unit 130 provided in the region (B).

The lens forming unit 110 may be a part of the preform structure 100 in which one unit lens is formed. For example, the lens forming unit 110 may include a convex lens forming unit 112 and a concave lens forming unit 114 provided on the opposite side of the convex lens forming unit 112. The convex lens forming part 112 may have a first curved surface 112a, and the concave lens forming part 114 may have a second curved surface 114a. Here, although the preform structure 100 having the convex lens forming unit 112 and the concave lens forming unit 114 has been described as an example, the structure of the lens forming unit 110 may be variously changed. For example, as another example, a preform structure in which convex lens forming parts 112 or concave lens forming parts 114 are formed may be provided.

The scribe part 120 may be an area other than the lens forming part 110. The scribing unit 120 may include a scribing region for cutting unit lenses of an array lens manufactured by processing the preform structure 100. In addition, the scribing unit 120 may be an area in which a lens support unit is disposed along the periphery of each of the unit lenses. The lens support part may be used as a support for mounting the unit lens to a lens module structure (not shown).

The gas processor 130 may be provided to effectively process a gas between the preform structure 100 and the mold during an array lens manufacturing process using the preform structure 100 and a predetermined mold (not shown). . For example, the gas processor 130 may be formed by providing a groove in an area of the preform structure 100 adjacent to the lens forming unit 110. As an example, the gas processor 130 may include a first groove 132 and a second groove 134. The first groove 132 is provided in an area of the preform structure 100 adjacent to the convex lens forming part 112, and the second groove 134 is the preform adjacent to the concave lens forming part 114. It may be provided in the area of the structure (100). Accordingly, the first and second grooves 132 and 134 may have a ring shape. On the other hand, the gas processing unit 130 controls the curvature of the first and second curved surfaces 112a, 114a, so that the gas between the preform structure 100 and the mold during the array lens manufacturing process, the lens It may further include a structure leading to the scribe area (B) from the formation region (A). Accordingly, the discharge of gas during the array lens manufacturing process is performed by the first and second grooves 132 and 134 and the first and second grooves formed in the portion of the preform structure 100 adjacent to the lens forming unit 110. It may be achieved by providing a structure for inducing the gas by adjusting the curvature of the curved surfaces (112a, 114a). A detailed gas treatment process of the gas processor 130 will be described later.

Referring to FIG. 3, the preform structure manufacturing apparatus 200 according to the embodiment of the present invention may manufacture the preform structure 100 described above by the injection molding method. For example, the preform structure manufacturing apparatus 200 may include a first mold 210 and a second mold 220 that generally provide a cavity having a shape corresponding to that of the preform structure 100. Therefore, the first mold 210 is provided with a lens forming surface 212 having a shape corresponding to the convex lens forming portion 112 of the lens forming unit 110, and the lens forming portion is provided in the second mold 220. A lens forming surface 214 having a shape corresponding to the concave lens forming unit 114 of 110 may be provided. The lens forming surfaces 212 and 214 may be any one of a spherical surface and an aspherical surface. In addition, the first and second molds 210 and 220 may include a gas processing unit forming unit 230 having a shape corresponding to the gas processing unit 130 of the preform structure 100. In the present embodiment, the preform structure manufacturing apparatus 200 having a mold 210 for manufacturing the preform structure 100 by injection molding has been described as an example, but the preform structure described above with reference to FIGS. 1 and 2 ( Various kinds of devices for manufacturing 100 may be used.

Hereinafter, a process of manufacturing an array lens using the preform structure 100 according to the embodiment of the present invention described above with reference to FIGS. 1 and 2 will be described in detail. Here, overlapping contents of the preform structure 100 described above may be omitted or simplified.

4A to 4C are diagrams for describing a process of manufacturing an array lens using a preform structure according to an embodiment of the present invention.

4A to 4C, an array lens manufacturing apparatus 300 may be prepared. For example, the array lens manufacturing apparatus 300 may include a first mold 310 and a second mold 320 facing each other. The first mold 310 may form a convex lens in the preform structure 100, and the second mold 320 may form a concave lens in the preform structure 100. To this end, the convex lens forming surface 312 may be provided on the first mold 310, and the concave lens forming surface 322 may be provided on the second mold 320. The convex lens forming surface 312 may have a concave curved surface toward the second mold 320, and the concave lens forming surface 322 may have a convex curved surface toward the first mold 210.

The preform structure 100 described with reference to FIGS. 1 and 2 may be disposed between the first mold 310 and the second mold 320. Here, the concave lens of the preform structure 100 so that the center of the convex lens forming portion 112 of the preform structure 100 is aligned with the center of the convex lens surface 312 of the first mold 310. The preform structure 100 and the array lens manufacturing apparatus 300 may be disposed such that the center of the forming unit 114 is aligned with the center of the concave lens forming surface 322 of the mold 300. Meanwhile, curvatures of the first curved surface 112a and the second curved surface 114a of the preform structure 100 may be adjusted according to the curvatures of the convex lens forming surface 312 and the concave lens forming surface 314. . For example, the first curved surface 112a of the preform structure 100 has a smaller curvature than the convex lens forming surface 312, and the second curved surface 114a is larger than the concave lens forming surface 322. Can have curvature.

In addition, the first mold 310 and the second mold 320 of the mold 300 may be in close contact with the preform structure 100 to pressurize the preform structure 100. Accordingly, the preform structure 100 may be processed and manufactured as an array lens 101 having a shape corresponding to the cavity of the mold 300.

In the manufacturing process of the array lens 101 as described above, the gas g between the lens forming unit 110 and the mold 200 of the preform structure 100 is scribed region (B) from the lens forming region (A) ) May be induced. For example, as described above, the first curved surface 112a of the preform structure 100 may have a smaller curvature than the convex lens forming surface 312 of the first mold 310. In this case, when the first mold 310 presses the preform structure 100, as shown in FIG. 4B, the first curved surface 112a of the convex lens forming unit 112 is the convex lens forming curved surface ( May be first contacted in the center of 312). Thereafter, when the first mold 310 further presses the preform structure 100, as shown in FIG. 3B, the lens forming unit 110 of the preform structure 100 is gradually pressed and spreads. In the process, the first curved surface 112a may be processed while gradually contacting the edge of the convex lens forming surface 212. Accordingly, the gas g between the convex lens forming unit 112 and the convex lens forming surface 312 may be guided from the lens forming region A to the scribe region B. In a similar manner, the second curved surface 114a of the concave lens forming part 114 first contacts the center of the concave lens forming surface 322 of the second mold 320, and then gradually forms the concave lens. It may be processed while contacting the edge of the face 322. Accordingly, the gas g between the concave lens forming part 114 and the concave lens forming surface 322 may be induced from the lens forming area A of the preform structure 100 to the scribe area 130. have.

Meanwhile, when the preform structure 100 is processed into the mold 300 to manufacture the array lens 101, the gas processing unit 130 of the preform structure 100 is adjacent to the gas processing unit 130. Filled by portions of the preform structure 100, it may be completely embedded. Accordingly, the recessed portion such as the gas processor 130 may not remain in the finally manufactured array lens 101. To this end, when manufacturing the preform structure 100, the depression volume of the gas processing unit 130 is adjusted in consideration of the shape of the array lens 101 and the cavity of the mold 300, which are finally manufactured. Can be.

As described above, the gas g is guided to the scribe region 130 from the lens forming region A, and the gas g guided to the scribe region B is inside the scribe region B. Or may be discharged to the outside of the mold 300. The gas g remaining in the scribe portion region B does not substantially affect the function and shape of the lens. In addition, since the gas g remaining in the scribe area B may be removed during the subsequent scribing process, the gas g may not affect the function and shape of the lens of the unit lens. Accordingly, in the present invention, the gas g between the preform structure 100 and the mold 300 is guided from the lens forming region A of the array lens 101 to the scribe region B, thereby providing the gas. Deformation of the lens spherical surface and shape of the array lens 101 by (g) can be prevented.

Hereinafter, various modifications of the preform structure according to the embodiment of the present invention will be described in detail. Here, the overlapping contents for the preform structure 100 according to the embodiment of the present invention described above may be omitted or simplified. Since the apparatus for manufacturing preform structures according to various modifications to be described below is modified to have a cavity corresponding to the formation of the preform structures to be described below, the description thereof will be omitted. In addition, the preform structures according to various modifications to be described below may be formed of the array lens through the same process as the above-described array lens manufacturing process, a description thereof will be omitted.

FIG. 5A is a view illustrating a modified example of the preform structure according to the embodiment of the present invention, and FIG. 5B is a cross-sectional view taken along the line II-II ′ of FIG. 5A.

5A and 5B, the preform structure 100a according to a modification of the present invention includes a lens forming area A and a scribe area B, and the lens forming part is formed in the scribe area B. FIG. A gas processor 130a may be provided including a hole 132a provided in an area adjacent to the area A. The holes 132a may be disposed at equal intervals along the scribe area B adjacent to the lens formation area A. FIG.

In the process of performing the array lens manufacturing process described above with reference to FIGS. 4A to 4C, the gas processing unit 130a may process the gas between the preform structure 100a and the mold 300. It can guide and process from the formation area A to the scribe area B. FIG. The gas induced into the scribe area B may be introduced into the hole 132a and trapped in the scribe area B while the hole 132a is filled. Alternatively, the gas may be discharged to the outside of the mold 300. Accordingly, the preform structure 100a according to the modified example of the present invention can prevent the lens curvature precision degradation and deformation of the lens forming region A by the gas g.

6A is a view illustrating another modified example of the preform structure according to the embodiment of the present invention, and FIG. 6B is a cross-sectional view taken along the line III-III ′ of FIG. 6A.

6A and 6B, the preform structure 100b according to another modification of the present invention includes a lens forming area A and a scribe area B, and the scribe area B has a depression 135. And a gas processing unit 130b including a hole 136 penetrating the recess. The depression 135 may be formed along the scribe area B adjacent to the lens formation area A to have a ring shape. The hole 136 may be provided to penetrate the recess 135, and at least one hole may be provided in the recess 135.

In the process of performing the array lens manufacturing process described above with reference to FIGS. 4A to 4C, the gas processing unit 130b may perform a gas g between the preform structure 100b and the mold 300. ) Is guided and processed from the lens forming region A to the scribe region B, whereby the degradation of lens curvature accuracy, deformation, etc. of the lens forming region A can be prevented by the gas g.

Figure 7a is a view showing another modified example of the preform structure manufacturing apparatus according to an embodiment of the present invention, Figure 7b is a cross-sectional view taken along the line IV-IV 'shown in Figure 7a.

7A and 7B, the preform structure 100c according to another modified embodiment of the present invention includes a lens forming region A and a scribe region B, and the scribe region B includes a gas processing unit ( 130c) may be provided. The gas processor 130c may include a first gas processor 137 provided adjacent to the convex lens forming unit 112 and a second gas processor 138 provided adjacent to the concave lens forming unit 114. The first gas processing unit 137 has a gas having a depression 137a and a connection part 137b connected to the depression 137a having substantially the same configuration as the depression 132 described above with reference to FIGS. 1 and 2. It may include a processor 130c. The connection part 137b may connect the depression 132 provided in one convex lens forming part of the convex lens forming part 112 and the depression 132 provided in the other convex lens forming part to each other. have. Since the second gas processor 138 has a structure and a function substantially the same as those of the first gas processor 137, a detailed description thereof will be omitted.

In the process of performing the array lens manufacturing process described above with reference to FIGS. 4A to 4C, the gas processing unit 130c having the above-described structure includes a gas between the preform structure 100c and the mold 300. By processing the liquid by flowing from the lens forming region A to the scribe region B, it is possible to prevent the lens curvature precision degradation, deformation, etc. of the lens forming region A by the gas g. In particular, the gas processor 130c may effectively discharge the gas g to the outside of the mold 300 through the connection part 137b during the array lens manufacturing process, thereby manufacturing efficiency of the array lens 101. Can improve.

The foregoing detailed description illustrates the present invention. It is also to be understood that the foregoing is illustrative and explanatory of preferred embodiments of the invention only, and that the invention may be used in various other combinations, modifications and environments. That is, changes or modifications may be made within the scope of the concept of the invention disclosed in this specification, the scope equivalent to the disclosed contents, and / or the skill or knowledge in the art. The foregoing embodiments are intended to illustrate the best mode contemplated for carrying out the invention and are not intended to limit the scope of the present invention to other modes of operation known in the art for utilizing other inventions such as the present invention, Various changes are possible. Accordingly, the detailed description of the invention is not intended to limit the invention to the disclosed embodiments. In addition, the appended claims should be construed as including steps in other embodiments.

1 is a view showing a preform structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3 is a view showing a preform structure manufacturing apparatus according to an embodiment of the present invention.

4A to 4C are diagrams for describing a process of manufacturing an array lens using a preform structure according to an embodiment of the present invention.

5A is a view showing a modification of the preform structure according to the embodiment of the present invention.

FIG. 5B is a cross-sectional view taken along the line II-II 'of FIG. 5A.

6A is a view showing another modified example of the preform structure according to the embodiment of the present invention.

FIG. 6B is a cross-sectional view taken along the line III-III ′ of FIG. 6A.

Figure 7a is a view showing another modification of the preform structure manufacturing apparatus according to an embodiment of the present invention.

FIG. 7B is a cross-sectional view taken along the line IV-IV 'of FIG. 7A.

Description of the Related Art [0002]

100: preform structure

110: lens forming unit

112: convex lens forming portion

114: concave lens forming portion

120: scribe part

130: gas processing unit

200: preform structure manufacturing apparatus

300: array lens manufacturing apparatus

Claims (8)

A lens forming unit corresponding to the lens forming surface of the mold for manufacturing the array lens; A scribe portion that is an area other than the lens forming portion; And And a gas processing part for guiding gas between the lens forming surface and the lens forming part from the lens forming part to the scribe part. The method of claim 1, And the gas processing part includes a depression formed in the scribe part adjacent to the lens forming part. The method of claim 1, And the gas processing part includes at least one hole formed in the scribe part adjacent to the lens forming part. The method of claim 1, The gas processing part includes a depression provided along an area adjacent to the lens forming part; And A preform structure comprising a connecting portion for connecting the depression provided in one of the lens forming portion and the depression provided in the other lens forming portion. The method of claim 1, The lens forming surface is any one of a spherical surface and an aspherical surface. 6. The method according to any one of claims 1 to 5, The lens forming portion has a convex curved surface toward the mold, The curvature of the lens forming portion is smaller than the lens forming surface of the mold. 6. The method according to any one of claims 1 to 5, The lens forming portion has a concave curved toward the mold, The curvature of the lens forming portion is larger than the lens forming surface of the mold. An apparatus for manufacturing the preform structure of claim 1, Preform structure manufacturing apparatus comprising a mold having a cavity of a shape corresponding to the preform structure.

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