TWI355846B - Digital still camera module and a lens used therei - Google Patents

Description

1355846 October 19, 100 Nuclear Replacement Page 6 Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a digital camera module and a lens thereof, and more particularly to a compact digital camera module and lens. [Prior Art] _] With the advent of the digital era, portable electronic devices such as mobile phones with a number of (four) machine modules have become popular. Portable electronic devices such as mobile phones with digital camera modules are moving toward light, thin, short, and small,

Easy for users to carry. The digital camera module of a conventional mobile phone with a digital camera module is used to enhance the lens image of the lens, and usually includes a plurality of lenses. However, due to the large number of lenses, the assembly process is complicated, and the optical axis of each mirror # is difficult to align during assembly, which affects the imaging quality of the digital camera module. SUMMARY OF THE INVENTION [0003] In view of this, a record is provided. New ± eight small-sized digital camera modules that are more compact and easier to assemble are necessary. [0004] In addition, it is necessary to provide a lens suitable for the compact digital camera module.

L_5J 094134352 1 digital camera module, comprising: a lens barrel, a lens and an image sensing two package 13⁄4 lens barrel in a semi-closed cylinder shape, having a side wall with 2 light holes; the lens is received in The lens barrel includes a first surface, a second surface, and a third surface; the first surface is a curved surface corresponding to the two first holes, and receives light rays that are lightly emitted by the human light hole; the t surface Corresponding to and corresponding to the first surface, receiving and reflecting the light refracted by the crucible, the third surface is a curved surface, and the second table form number is 4 I/* 17 w, 1〇〇3382973- 1355846 100 years October 19th repair: the replacement page corresponds to and is connected to the first surface and the second surface, receiving and transmitting the light reflected by the second surface; wherein the lens barrel and the lens are fixed on the image The sensor package is mounted, and the image sensor package receives light emitted by the third surface.

[0006] A lens comprising a first surface that receives and converges incident light; a second surface coupled to the first surface and corresponding to receive and reflect light refracted by a first surface; a surface corresponding to the second surface and connected to both the first surface and the second surface to receive and transmit the light reflected by the second surface; wherein the optical design of the second surface and the third surface of the first surface The following optical matrix is satisfied: [0007] text j 0, η 1 /. -2 ο ι ο « Λ [0008] ^ΪΜΡ ^iMPxy

'ι1』ka3X 乂[0009] where n〇 is the refractive index of the air; the image height of the surface of the lens; the image height, 峨 = the image on the image surface of the south surface of the incident Angle; "3χ system: incident angle of incident light on the surface; angle of incidence of incident light on the imaging surface of the lens, radius of curvature of the first surface is the curvature of the second surface, and is the third surface The radius of curvature is the distance between the photons of the first surface and the optical center of the first surface, the distance between the photons of the second surface and the optical center of the second surface; and the d system 094134352 Form No. A0101 Page 5 / Total 17 pages 1003382973-0 1355846 On October 19, 100, the vertical distance between the optical center of the three surfaces of the replacement page and the imaging surface of the lens was corrected. [0010] Compared with the prior art, the digital camera module is used for imaging by the lens, and the optical lens is disposed in two vertical directions, which can reduce the height of the digital camera module in the same direction; Since the lens integrates the three optical surfaces on one lens, the number of optical components is reduced, thereby reducing the difficulty of the digital camera module during assembly and improving the imaging quality of the digital camera module. [Embodiment] Referring to the first embodiment, a preferred embodiment of the digital camera module of the present invention includes a lens barrel 10, a lens 20 and an image sensor package 30. [0012] The lens barrel 10 has a semi-closed cylindrical shape for housing the lens 20. The lens barrel 10 has a light entrance hole 12 formed in the side wall. The light-receiving hole 12 is embedded with a transparent plate 14 for closing the light-incident hole 12 to prevent impurities such as dust from entering the lens barrel 10 to contaminate the lens 20. [0013]

The lens 20 is a triangular prism having a first surface 22, a second surface 24 and a third surface 26. The three surfaces 22, 24, 26 may be spherical or aspherical, and the three surfaces 22, 24 26 is an asymmetrical surface. The optical center of the first surface 22 corresponds to the center of the light entrance hole 12, and receives and converges the light entering through the light entrance hole 12. The second surface 24 is coupled to and corresponds to the first surface 22, which has a high reflectivity, and the second surface 24 receives and reflects the light concentrated by the first surface 22. The third surface 26 is coupled to both the first surface 22 and the second surface 24 and corresponds to the second surface 24 that receives and emits light reflected by the second surface 24. The third surface 26 and the first surface 22 and the third surface 26 and the second surface 24 are joined to form a holding portion 261, the holding portion 094134352 Form No. A0101 Page 6 / 17 pages 1003382973-0 1355846 ~; The 100th. October 19th nuclear replacement page '261 is used to mate the lens 20 with the image sensor package 30. [0014] The lens 20 is processed by injection molding using an optical plastic material. Referring to the second figure, the optical design of the first surface 22, the second surface 24, and the third surface 26 of the lens 20 needs to satisfy the following optical matrix: [0015] (1 0 n-riQ n_ -nR3X n0 ^ (Λ 2 °Vl o 1

^2X 1 0 n〇-n n〇_ -n^ix « [0016] IMP ·* ri ^¥;x3 •« ,[〇 l

Wherein % is the refractive index of the air; [0018] the refractive index of the η-based lens 20; [0019] Χι is the image height of the first surface 22; [0020] X3 is the image height of the third surface 26; 0021] the image height of the imaging surface of the XIMp lens 20; [0022] a 1 χ is the incident angle of incident light on the first surface 22; [0023] a 3 χ is the incident angle of incident light on the third surface 26; [0024] a ΙΜρχ incident angle of incident light on the imaging surface of the lens 20 [0025] Ri radius of curvature of the first surface 22 of the system; [0026] radius of curvature of the second surface 24 of the R system; L·X [0027] R3 χ The radius of curvature of the third surface 26; Form No. A0101 Page 7 of 17 094134352 1003382973-0 1355846 __ October 19, revised correction page [0028] \ is the optical center and second surface of the first surface 22 The distance from the optical center of 24; d2 is the distance between the optical center of the second surface 24 and the optical center of the third surface 26; and [0030] d3 is the optical center of the third surface 26 and the imaging surface of the lens 20. vertical distance. [0031] The image sensor package 30 includes a carrier 31 and an image sensing chip.

33 and a plurality of bonding wires 35. The carrier 31 includes a bottom portion 312 and a side wall 314 that protrudes from one side of the bottom portion 312 toward one side. A plurality of pads 315 are disposed on the top surface of the bottom portion 312 of the carrier 31. The side wall 314 has a flange 316 and a first top surface 317 extending upwardly from the periphery of the first top surface 317 such that the inner wall of the side wall 314 is stepped. The inner wall profile of the flange 316 is larger than the contour of the third surface 26 of the lens 20, and the inner edge profile of the first top surface 317 is smaller than the contour of the third surface 26 of the lens. The top surface of the bottom portion 312 and the inner wall of the side wall 314 enclose a stepped chamber 318. The image sensing wafer 33 is located within the chamber 318 and is secured to the top surface of the bottom 312 of the carrier 31. A sensing area 331 and a plurality of wafer pads 333 are disposed on the top surface of the image sensing wafer 33. One end of the plurality of bonding wires 35 is fixedly electrically connected to the plurality of die pads 333, and the other end thereof is electrically connected to the plurality of pads 31 5 of the top surface of the bottom portion 31 2 of the carrier 31. A bottom surface of the bottom portion 312 of the carrier 31 of the image sensor package 30 is provided with a plurality of pads (not shown) for electrically connecting with other circuit boards, and the plurality of pads and the top surface of the bottom portion 312 are solder pads 315. Phase electrical connection. [0032] The optical axis of the third surface 26 of the lens 20 and the image sensing wafer 33 sensing area 1003382973-0 094134352 Form No. A0101 Page 8 of 17 1355846 » -* "ϊ〇〇年10B 19 In the future, the center of the positive 31 is corresponding and the top surface of the image sensing wafer 3 3 is located on the image plane (IMP) of the lens 20. The holding portion 261 of the lens 20 is fixed to the first top surface 317 of the carrier 31 by an adhesive. The lens 20 encloses the image sensing wafer 33 in the chamber 318 to prevent impurities such as dust from entering the chamber 318 and contaminating the image sensing wafer 33. The lens barrel 10 is sleeved on the outside of the lens 20 and fixedly disposed on the flange 316 of the carrier 31. The center of the light entrance hole 12 corresponds to the optical center of the first surface 22 of the lens 20. [0033] It can be understood that The digital camera module may further include other lenses for imaging, in which case the lens 20 is imaged as a relay lens and other lenses as a whole. [0034] A preferred embodiment of the digital camera module of the present invention reduces the height of the digital camera module in the same direction by using a lens 2 for imaging 'the optical surface is disposed in two perpendicular directions; Since the lens integrates three optical surfaces on a lens, the number of optical components is reduced, thereby reducing the difficulty of the digital camera module during assembly and improving the imaging quality of the lens. In summary, the present invention complies with the requirements of the invention patent, and Newfa proposes a patent application π. However, the above-mentioned embodiments are merely preferred embodiments of the present invention, and those skilled in the art that are skilled in the art will be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a digital camera module 1 (four) (four) of the present invention. 094134352 Form No. 1010101 1003382973-0 1355846 October 19, 100 Revision Replacement Page [0037] The second figure is a digital camera of the present invention The optical design of the lens of the module is not intended. [Main component symbol description] [0038] Lens barrel: 10 [0039] Light entrance hole: 12 [0040] Transparent plate: 14 [0041] Lens: 20 [0042] First surface: 22 [0043] Second surface: 24 [0044] Third surface: 26 [0045] Holder: 261 [0046] Image sensor package: 30 [0047] Carrier: 31 [0048] Bottom: 312 [0049] Sidewall: 314 [0050] Bottom pad : 315 [0051] Flange: 316 [0052] First top surface: 317 [0053] Room: 318 [0054] Image sensing wafer: 33 Form No. A0101

094134352 Page 10 of 17 1003382973-0 100 years. October 19th revised replacement page 1355846 '[0055] Sensing area: 331 ' [0056] Wafer pad: 333 [0057] Wire bond: 35

094134352 Form No. A0101 Page 11 of 17 1003382973-0

Claims (1)

1355846 ι_ October 19, 100 nuclear replacement page VII, the scope of patent application: A digital camera module, comprising: a lens barrel, which is semi-closed cylindrical, has a side wall, the side wall is provided with a light hole a lens, which is received in the lens barrel, comprising: a first surface, which is a curved surface corresponding to the light entrance hole, receives and condenses light incident by the light entrance hole; a second surface, and the first surface The surface is connected and correspondingly, receiving and reflecting the light refracted by a first surface; a third surface being a curved surface corresponding to the second surface and connected to the first surface and the second surface, receiving and Transmitting the light reflected by the second surface, and an image sensor package; wherein the lens barrel and the lens are fixed on the image sensor package, and the image sensor package is located on the imaging surface of the lens The optical design of the first surface, the second surface, and the third surface of the lens satisfies the following optical matrix: ^IMP ά3 χ3 Va3X/ ^ 1 0, η-η0 η ή2, (1 o') l ί1 Μ r 1 0, π0 - η η0 \a3jrj 1° ι) l〇lj , -nRlx η ) where, air Refractive index; refractive index of η-based lens; image height of first surface of Xi system; 094134352 Form No. A0101 Page 12 of 17 1003382973-0 135.5846 Correction of replacement page X series third surface on October 19, 100 Image height; 像xIMP system image height on the imaging surface; αιχ is the incident angle of incident light on the first surface; α3χ incident angle of incident light on the third surface; incident light on the imaging surface of the α ΐΜΡΧ lens Incident angle; R, the radius of curvature of the first surface; 1 X r2x is the radius of curvature of the second surface; RQ is the radius of curvature of the third surface; 3x \ is the distance between the optical center of the first surface and the optical center of the second surface; d2 is the distance between the optical center of the second surface and the optical center of the third surface; and the optical center of the third surface of the d3 system and the imaging surface of the lens The vertical distance. 2. The digital camera module of claim 1, wherein a transparent plate is embedded in the light entrance of the lens barrel. 3. The digital camera module of claim 1, wherein the third surface forms a holding portion at the junction with the second surface and the first surface. 4. The digital camera module of claim 3, wherein the image is The image sensing package includes a carrier and an image sensing wafer mounted in the carrier. 5. The digital camera module of claim 4, wherein the carrier comprises a bottom and a side wall projecting from the bottom to the side, and the bottom top surface and the inner wall of the side wall enclose a cavity. 6. The digital camera module of claim 5, wherein the top surface of the bottom portion is provided with a plurality of pads. 7. The digital camera module of claim 6, wherein the image sensing wafer is located in a chamber and is fixed to a top surface of the bottom of the carrier. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The mask has a sensing area, and the top surface of the image sensing wafer is provided with a plurality of wafer pads. 9. The digital camera module of claim 8, wherein the image sensor package further comprises a plurality of bonding wires, the one end of the plurality of bonding wires is fixedly connected to the wafer pad of the image sensing crystal moon, and One end is fixedly connected to the top surface of the bottom of the carrier. 10. The digital camera module of claim 5, wherein the side is The wall has a flange and a first top surface that extends upwardly from the periphery of the first top surface. 11. The digital camera module of claim 10, wherein the retaining portion of the third surface is secured to the first top surface of the carrier and encloses the chamber of the carrier. The digital camera module of claim 11, wherein the lens barrel is fixed to the & edge of the carrier. 13. A lens, including: a first surface that receives and converges incident light; a second surface that is coupled to the first surface and that receives and reflects light refracted by a first surface; a third surface that is opposite the second surface Corresponding to and connected to the first surface and the second surface, receiving and transmitting the light reflected by the second surface; wherein the optical design of the first surface, the second surface and the third surface meets the following optical matrix: 094134352 1 0 η-η0 η —nR^x tiQ Form No. A0101 2 °Vl 0 Page 14 of 17 0 1 0 £〇_ \a\X/ 1003382973-0 1355846 100 years. October 19. Correction replacement Page f γ Λ fl ΔΛ '·V \^ΪΜΡΧ> \·α3Χν where, n折射率 is the refractive index of the air; the refractive index of the η-based lens; \ is the image height of the first surface; 像3 is the image height of the third surface像ιμρ The image height on the imaging surface of the lens; α1χ is the incident angle of the incident light on the surface of the lens; the incident angle of the incident light on the third surface; the incident angle of the incident light on the imaging surface of the α-lanthanide lens; Rlx Radius of curvature of the first surface; The radius of curvature of the second surface; the radius of curvature of the third surface of the RSx system; the distance between the optical center of the first surface and the optical center of the second surface The distance between the optical center of the second surface of the V-system and the optical center of the third surface and the vertical distance between the optical center of the third surface of the d3 system and the imaging surface of the lens. 094134352 Form bat number A0101 Page 15 of 17 1003382973-0