TWI394436B - Digital camera module and a method of assembling the same - Google Patents

Description

Digital camera module and assembly method thereof

The present invention relates to a digital camera module and an assembly method thereof, and more particularly to a digital camera module applied to a mobile phone and an assembly method thereof.

At present, mobile phones are moving toward a multi-functional trend, and mobile phones with digital camera modules are popular with consumers as soon as they are launched. The digital camera module used in mobile phones not only needs to have better imaging functions, but also needs its structure to cooperate with the structure of the mobile phone casing to save the space of the mobile phone to meet the consumer's thinning of the mobile phone. Need.

Referring to FIG. 1 , a conventional digital camera module 300 is mounted in a mobile phone 100. The digital camera module 300 includes a lens holder 301 and a lens barrel 302. The lens holder 301 and the lens barrel 302 are connected by screws. In one piece, the outer periphery of the lens holder 301 and the lens barrel 302 is at right angles to the top surface of each of the mirror holders 302. The mobile phone 100 includes a body 1001 having a curved portion 1004 and a planar portion 1005.

The digital camera module 300 has the disadvantage that when the digital camera module 300 is installed in the mobile phone 100, if the outer periphery of the lens barrel 302 intersects with the top surface, the surface of the mobile phone 100 is fixed to the surface of the mobile phone 100. The portion 1004 and the critical point 1002 of the plane portion 1005 or the critical point 1002 to the plane portion 1005 side will make a large space 1003 on the top of the mobile phone 100, thereby increasing the image sensing module 300 in the mobile phone. Take up space. If the sharp right-angled edge of the lens holder 301 and the lens barrel 302 directly abut against the curved surface portion 1004 of the mobile phone 100 body 1001, not only the internal body 1001 of the mobile phone 100 is easily damaged, but also the outer edge of the right angle will be Arrive The top curved surface portion 1004 causes a certain gap between the top surface of the lens barrel 302 and the planar portion 1005, thereby increasing the space occupied by the entire digital camera module 300 in the mobile phone 100, which is equivalent to adding the mobile phone 100 invisibly. The thickness is not conducive to the development of the mobile phone in the thinning direction, and the mounting stability of the digital camera module 300 in the mobile phone 100 is deteriorated because of the spacing between the top surface of the lens barrel 302 and the planar portion 1005. .

In view of this, the present invention provides a digital camera module that can reduce the space for intercommunication with a mobile phone.

In addition, the present invention also provides a method of assembling the digital camera module.

A digital camera module includes an image sensing module and a lens module connected thereto, and a peripheral surface of the lens module is a curved surface.

A method for assembling a digital camera module, comprising the steps of: providing an image sensing module; providing a lens holder having a top surface as a curved surface; providing a lens barrel having a top surface as a curved surface; The lens barrels are connected to form a lens module; the lens module and the image sensing module are connected.

Compared with the prior art, the digital camera module adopts a mirror base and a lens barrel with a curved outer shape, which can avoid the damage of the sharp edge to the mating shell and reduce the space occupied by the digital camera module.

The digital camera module has a simple assembly method, is easy to process, and is easy to achieve the purpose of reducing the volume of the mobile phone.

(known)

100‧‧‧Mobile Phone

1001‧‧‧ body

1002‧‧ ‧ critical point

1003‧‧‧ space

1104‧‧‧Surface part

1105‧‧‧ Planar section

300‧‧‧ digital camera

301‧‧‧ mirror base

302‧‧‧Mirror tube

(this invention)

200‧‧‧Digital Camera Module

400‧‧‧Mobile Phone

4001‧‧‧ body

4002‧‧‧ screen

4003‧‧‧ keyboard

50‧‧‧Image Sensing Module

52‧‧‧Substrate

520‧‧‧ top surface

522‧‧‧First pad

54‧‧‧Image sensing chip

540‧‧‧Sensing area

542‧‧‧Second pad

56‧‧‧welding line

58‧‧‧Transparent cover

60‧‧‧Lens module

62‧‧‧Mirror base

620‧‧‧first open end

621‧‧‧Ontology

622‧‧‧second open end

624‧‧‧ peripheral wall

626‧‧‧Boss

628‧‧‧ internal thread

64‧‧‧Mirror tube

640‧‧‧Top

642‧‧‧ bottom

644‧‧‧The wall

646‧‧‧Light hole

648‧‧‧ external thread

66‧‧‧ lenses

80‧‧‧Viscos

90‧‧ ‧ room

1 is a cross-sectional view of a conventional digital camera module mounted on a mobile phone; FIG. 2 is a block diagram of a digital camera module of the present invention; and FIG. 3 is a cross-sectional view of the digital camera module of the present invention mounted on a mobile phone.

Referring to FIG. 2 , the digital camera module 200 of the preferred embodiment of the present invention includes an image sensing module 50 and a lens module 60 . The image sensing module 50 includes a substrate 52 , an image sensing wafer 54 , a plurality of bonding wires 56 , and a transparent cover 58 . The lens module 60 includes a lens holder 62, a lens barrel 64 and a lens 66.

The substrate 52 is substantially flat and is typically made of a material such as ceramic or glass and has a top surface 520 on which a plurality of first pads 522 are disposed.

The image sensing chip 54 is disposed on the top surface 520 of the substrate 52. The top surface of the image sensing chip 54 has a sensing area 540. A plurality of second pads 542 are disposed around the sensing area 540. The second pad 542 is configured to output an image signal generated by the image sensing chip 54.

One end of the plurality of bonding wires 56 is connected to the first pad 522 and the other end is connected to the second pad 542 respectively, thereby electrically connecting the substrate 52 and the image sensing chip 54.

The transparent cover 58 is disposed on the image sensing chip 54 and is made of a light transmissive glass or plastic material.

The lens holder 62 has a hollow cylindrical shape and has a body 621 having a first open end 620, a second open end 622 and an outer peripheral wall 624. The first open end 620 is fixedly connected to the substrate 52 in a manner of sealing against the top surface 520. The second open end 622 and the outer peripheral wall 624 of the body 621 intersect at a substantially curved surface, and the curved surface has a certain curvature. The curvature can be adjusted according to the housing to be fitted. This design not only helps to reduce the digital camera module 200 with curved or beveled surfaces. The space occupied by the shape of the mobile phone, thereby reducing the size of the mobile phone, is conducive to the development of mobile phones in the direction of thinning. In addition, the curved structure avoids the damage of the sharp edge to the mating shell and improves the reliability of the installation. An annular boss 626 extends inwardly from a central portion of the inner wall of the body 621. The diameter of the inner diameter of the boss 626 is greater than the length of the sensing region 540 of the image sensing chip 54. The boss 626 divides the interior of the lens holder 62 into two spaces. The space on the side of the first open end 620 is used to receive the image sensing wafer 54 therein, and is formed on the inner peripheral wall of the space on the side of the second open end 622. Internal thread 628. The transparent cover 58 is adhered to the lower surface of the boss 626 by the adhesive 80, and its size is larger than the inner diameter of the boss 626, so that the image sensing wafer 54 is enclosed by the substrate 52, the mirror 62 and the convex portion thereof. The table 626 and the transparent cover 58 enclose a sealed chamber 90 to prevent contamination of impurities such as dust.

The lens barrel 64 has a hollow cylindrical shape with a top end 640, a bottom end 642 and a peripheral wall 644. The top end 640 defines a light transmission hole 646 to ensure that external light enters the lens barrel 64. On the peripheral wall 644, an external thread 648 is formed between the middle portion and the bottom end portion 642 for cooperating with the internal thread 628 of the lens holder 62. The top end 640 and the peripheral wall 644 intersect at a curved surface, and the curved surface also has a certain degree of curvature and can be adjusted according to the required housing.

The lens 66 is fixed in the lens barrel 64 and is opposite to the sensing area 540 of the image sensing wafer 54 while being aligned with the center of the light transmission hole 646.

A method of assembling a digital camera module 200 according to a preferred embodiment of the present invention includes the following steps:

A substrate 52 is provided having a top surface 520 on which a plurality of first pads 522 are spaced apart.

An adhesive is applied to the top surface 520 of the substrate 52, and the image sensing wafer 54 is placed on the adhesive to connect the image sensing wafer 54 to the substrate 52. The image sensing wafer 54 has a center in the top surface. The sensing region 540 is provided with a plurality of second pads 542 at a peripheral portion of the sensing region 540.

The plurality of bonding wires 56 are driven by a wire bonding machine, and one end of each bonding wire 56 is electrically connected to the first pad 522 on the top surface 520 of the substrate 52, and the other end is electrically connected to the second electrode of the upper surface of the image sensing chip 54. The pad 542 is mounted to transmit the signal of the image sensing wafer 54 to the substrate 52. The material of the plurality of bonding wires 56 is made of a metal such as gold having good conductivity.

A hollow mirror holder 62 is manufactured by injection molding technology by injecting a heated softened molten plastic material into a cavity of a metal mold by an injection molding machine, and cooling to form a second open end 622 and a peripheral wall 624 at a time. The intersection is a curved mirror mount 62 and defines internal threads 628 on the inner peripheral wall.

A transparent cover 58 made of a light transmissive glass or plastic is adhered to the lower surface of the boss 626 of the lens holder 62 by an adhesive 80.

A hollow lens barrel 64 is manufactured by injection molding technique in the same manner as the lens holder 62, thereby forming a lens barrel 64 having a curved surface, and forming an external thread 648 on the peripheral wall 644 of the lens barrel 64.

The lens 66 is fixed in the lens barrel 64 by adhesive.

The internal thread 628 of the lens holder 62 is connected to the external thread 648 of the lens barrel 64. After the focal length is adjusted, the lens holder 62 and the lens barrel 64 are fixed by adhesive.

Finally, the first open end 620 of the lens holder 62 to which the lens barrel 64 is attached is sealed to the top surface 520 of the substrate 52 by adhesive, so that the image sensing wafer 54 is enclosed by the substrate 52 and the mirror holder 62. The boss 626 and the transparent cover 58 enclose the sealed chamber 90 to prevent contamination of impurities such as dust, thereby completing the assembly of the digital camera module 200.

When the digital camera module 200 is installed in the mobile phone 400, please refer to FIG. 3, wherein the mobile phone 400 includes a body 4001 having a curved or beveled shape, a screen 4002, a keyboard 4003, and is installed in the mobile phone 400. The digital camera module 200 includes a mirror mount 62 having a curved outer shape and a lens barrel 64. Mounting the digital camera module 200 with a curved surface In the mobile phone 400 of the beveled shape, the curved surface of the lens holder 62 and the lens barrel 64 cooperate with the edge of the mobile phone 400 to reduce the volume occupied by the digital camera module 200 in the mobile phone 400.

It can be understood that the lens barrel can be omitted, and at least one lens can be fixed in the lens holder by snapping or bonding to meet the needs of imaging.

It can be understood that the lens holder and the lens barrel respectively comprise a top surface and a side surface, the top surface intersecting the side surface, the curved surface being located at the intersection of the top surface and the side surface thereof.

It can be understood that when manufacturing the mirror base and the lens barrel, the mirror base and the lens barrel with no curved surface on the top surface of the top surface can be formed, and after the cutting process, the lens holder and the lens barrel with the curved top surface of the top surface can be obtained.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in accordance with the spirit of the present invention are It should be covered by the following patent application.

200‧‧‧Digital Camera Module

50‧‧‧Image Sensing Module

52‧‧‧Substrate

520‧‧‧ top surface

522‧‧‧First pad

54‧‧‧Image sensing chip

540‧‧‧Sensing area

542‧‧‧Second pad

56‧‧‧welding line

58‧‧‧Transparent cover

60‧‧‧Lens module

62‧‧‧Mirror base

620‧‧‧first open end

621‧‧‧Ontology

622‧‧‧second open end

624‧‧‧ peripheral wall

626‧‧‧Boss

628‧‧‧ internal thread

64‧‧‧Mirror tube

640‧‧‧Top

642‧‧‧ bottom

644‧‧‧The wall

646‧‧‧Light hole

648‧‧‧ external thread

66‧‧‧ lenses

80‧‧‧Viscos

90‧‧ ‧ room

Claims (12)

A digital camera module installed in a mobile phone, the mobile phone comprising a body having a curved or beveled shape, the digital camera module comprising: an image sensing module; and a lens module having a top surface including a periphery The curved surface is connected to the image sensing module, and the curved surface is matched with a body having a curved or beveled shape. The digital camera module of claim 1, wherein the lens module comprises a lens barrel, the lens barrel includes a top surface and a side surface, and the curved surface is disposed on a top surface and a side surface of the lens barrel. Intersection. The digital camera module of claim 1, wherein the lens module comprises a lens holder, the lens holder comprises a top surface and a side surface, wherein the curved surface is disposed on the top surface and the side surface of the lens holder. Intersection. The digital camera module of claim 1, wherein the lens module comprises a lens barrel and a lens holder, the lens barrel includes a top surface and a side surface, and the curved surface is disposed on the top of the lens barrel. The intersection of the face and the side; the mirror base also includes a top surface and a side surface, and the intersection of the top surface and the side surface of the mirror holder is provided with another curved surface. The digital camera module of any one of the preceding claims, wherein the image sensing module comprises a substrate, an image sensing chip and a plurality of bonding wires; and the image sensing module The group is fixed to the lens holder; the substrate has a top surface; the image sensing wafer is disposed on the top surface of the substrate; and the plurality of bonding wires electrically connect the substrate and the image sensing wafer. The digital camera module of claim 5, wherein the inner peripheral wall of the middle portion of the lens holder extends inwardly, and the image sensing module comprises a transparent cover body, and the transparent cover body It is disposed on the lower surface of the boss to cover the image sensing wafer. The digital camera module of claim 6, wherein the transparent cover, the mirror holder and the boss thereof and the substrate seal the image sensing wafer. A method for assembling a digital camera module, comprising the steps of: providing an image sensing module; providing a mirror base with a top surface as a curved surface; providing a lens barrel with a top surface as a curved surface; providing a curved or beveled shape a mobile phone of the body; connecting the lens holder and the lens barrel to form a lens module; connecting the lens module and the image sensing module; and connecting the lens to the image sensing module The module is mounted in the mobile phone such that the curved surface of the periphery of the lens module matches the body having a curved or beveled shape. The method of assembling a digital camera module according to claim 8, wherein the mirror base and the lens barrel are manufactured by injection molding technology; the lens barrel is screwed to the lens holder. The method for assembling a digital camera module according to claim 8, wherein the lens holder and the lens barrel are fixed by a glue after adjusting the focal length. The method of assembling a digital camera module according to claim 8, wherein the image sensing module comprises a substrate, an image sensing chip, a plurality of bonding wires and a transparent cover; the image sensing module The group is fixed to the lens holder; the substrate has a top surface; the image sensing wafer is disposed on the top surface of the substrate; and the plurality of bonding wires are electrically connected to the substrate and the image sensing wafer. The method of assembling a digital camera module according to claim 11, wherein a central portion of the inner peripheral wall of the lens holder extends inwardly, and the transparent cover is fixed in the lens holder by an adhesive.