# US 12,001,077 B2 · Imaging lens assembly module, camera module and electronic device

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- Number: US 12,001,077 B2
- Document ID: US12001077B2
- Status: Granted
- Kind: B2
- Application number: 17/203,926
- Filed: 2021-03-17
- Published: 2021-11-25
- Granted: 2024-06-04
- Earliest claimed: 2020-05-20
- Assignees: Largan Precision Co., Ltd.
- Applicants: Largan Precision Co., Ltd.
- Inventors: Lin-An Chang; Ming-Ta Chou; Shu-Yun Yang; Cheng-Feng Lin; Hsiang-Chi Tang
- Web page: https://patentgrep.com/patent/US12001077B2

## CPC

- G02B 7/09: adapted for automatic focusing or varying magnification
- G02B 1/04: made of organic materials, e.g. plastics (G02B1/08 takes precedence)
- G02B 13/0065: {having a beam-folding prism or mirror}
- G03B 11/04: Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B 17/17: with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
- G02B 5/003: {Light absorbing elements}
- G02B 7/021: {for more than one lens}
- G02B 7/022: {lens and mount having complementary engagement means, e.g. screw/thread}
- G02B 13/0035: {having three lenses}
- G02B 27/646: {compensating for small deviations, e.g. due to vibration or shake (movement of one or more optical elements for control of motion blur in cameras, projectors or printers G03B2205/0007; image stabilisation in cameras peculiar to the presence or use of an electronic image sensor H04N23/68)}
- G03B 30/00: Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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 (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

An imaging lens assembly module includes an imaging lens element set, a lens carrier and a light blocking structure. The imaging lens element set has an optical axis. At least one lens element of the lens elements is disposed in the lens carrier. The light blocking structure includes a light blocking opening. The optical axis passes through the light blocking opening, and the light blocking opening includes at least two arc portions and a shrinking portion. Each of the arc portions has a first curvature radius for defining a maximum diameter of the light blocking opening. The shrinking portion is connected to the arc portions for forming the light blocking opening into a non-circular shape. The shrinking portion includes at least one protruding arc which extends and shrinks gradually from the shrinking portion to the optical axis, and the protruding arc has a second curvature radius.

## Claims

### Claim 1

An imaging lens assembly module, comprising:
an imaging lens element set comprising a plurality of lens elements, and having an optical axis;
a lens carrier, wherein at least one lens element of the lens elements is disposed in the lens carrier; and
a light blocking structure being a light blocking sheet mounted on the lens carrier, located on an image side of the at least one lens element, and comprising:
a light blocking opening, the optical axis passing through the light blocking opening, and the light blocking opening comprising:
at least two arc portions, wherein each of the at least two arc portions has a first curvature radius, and the first curvature radius is for defining a maximum diameter of the light blocking opening; and
a shrinking portion connected to the at least two arc portions, wherein the shrinking portion comprises at least one protruding arc extending and shrinking gradually from the shrinking portion to the optical axis, and the at least one protruding arc has a second curvature radius;
wherein the light blocking structure is an aperture stop of the imaging lens assembly module for controlling an amount of an incident light of the imaging lens assembly module;
wherein the maximum diameter of the light blocking opening is D, the second curvature radius of the protruding arc is R, and the following condition is satisfied:
0.01<R/D<3.

### Claim 2 (depends on 1)

The imaging lens assembly module of claim 1, wherein the maximum diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.20<dmin/D<0.45.

### Claim 3 (depends on 1)

The imaging lens assembly module of claim 1, wherein the maximum diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.25<dmin/D<0.40.

### Claim 4 (depends on 1)

The imaging lens assembly module of claim 1, wherein a number of the lens elements of the imaging lens element set is N, and the following condition is satisfied:
3≤N≤8.

### Claim 5 (depends on 1)

The imaging lens assembly module of claim 1, wherein a maximum field of view of the imaging lens assembly module is FOV, and the following condition is satisfied:
3 degrees≤FOV≤40 degrees.

### Claim 6

An imaging lens assembly module, comprising:
an imaging lens element set comprising a plurality of lens elements, and having an optical axis;
a lens carrier, wherein at least one lens element of the lens elements is disposed in the lens carrier;
a light blocking structure being a light blocking sheet mounted on the lens carrier, located on an image side of the at least one lens element, and comprising:
a light blocking opening, the optical axis passing through light blocking opening, and the light blocking opening comprising:
at least two arc portions, wherein each of the at least two arc portions has a first curvature radius, and the first curvature radius is for defining a maximum diameter of the light blocking opening; and
a shrinking portion connected to the at least two arc portions, wherein the shrinking portion comprises at least one protruding arc extending and shrinking gradually from the shrinking portion to the optical axis, and the at least one protruding arc has a second curvature radius; and
a driving device for driving the imaging lens element set and the light blocking structure to move simultaneously along at least one direction;
wherein the maximum diameter of the light blocking opening is D, a cross-sectional area of the light blocking opening is A, and the following condition is satisfied:
0.30<A/[π×(D/2)2]<0.95, wherein π is a ratio of a circumference of a circle to a diameter of the circle.

### Claim 7 (depends on 6)

The imaging lens assembly module of claim 6, wherein the maximum diameter of the light blocking opening is D, the cross-sectional area of the light blocking opening is A, and the following condition is satisfied:
0.50<A/[π×(D/2)2]<0.90, wherein π is the ratio of the circumference of the circle to the diameter of the circle.

### Claim 8 (depends on 6)

The imaging lens assembly module of claim 6, wherein the maximum diameter of the light blocking opening is D, the second curvature radius of the protruding arc is R, and the following condition is satisfied:
0.01<R/D<3.

### Claim 9 (depends on 6)

The imaging lens assembly module of claim 6, wherein the maximum diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.20<dmin/D<0.45.

### Claim 10 (depends on 9)

The imaging lens assembly module of claim 9, wherein the diameter of the light blocking opening is D, the minimum distance between the protruding arc and the center of the light blocking opening is dmin, and the following condition is satisfied:
0.25<dmin/D<0.40.

### Claim 11 (depends on 6)

The imaging lens assembly module of claim 6, further comprising:
at least one reflecting element located on at least one side of an object side and an image side of the imaging lens element set.

### Claim 12 (depends on 6)

The imaging lens assembly module of claim 6, wherein the lens carrier is a plastic injection-molded member, and the driving device is disposed on the lens carrier.

### Claim 13 (depends on 6)

A camera module, comprising:
the imaging lens assembly module of claim 6; and
an image sensor disposed on an image surface of the imaging lens assembly module.

### Claim 14 (depends on 13)

An electronic device, comprising:
the camera module of claim 13.

### Claim 15

An imaging lens assembly module, comprising:
an imaging lens element set comprising a plurality of lens elements, and having an optical axis;
a lens carrier, wherein at least one lens element of the lens elements is disposed in the lens carrier;
a light blocking structure being a light blocking sheet mounted on the lens carrier, located on an image side of the at least one lens element, and comprising:
a light blocking opening, the optical axis passing through light blocking opening, and the light blocking opening comprising:
at least two arc portions, wherein each of the at least two arc portions has a first curvature radius, and the first curvature radius is for defining a maximum diameter of the light blocking opening; and
a shrinking portion connected to the at least two arc portions, wherein the shrinking portion comprises at least one protruding arc extending and shrinking gradually from the shrinking portion to the optical axis, and the at least one protruding arc has a second curvature radius; and
a driving device for driving the imaging lens element set and the light blocking structure to move simultaneously along at least one direction;
wherein the maximum diameter of the light blocking opening is D, the second curvature radius of the protruding arc is R, and the following condition is satisfied:
0.01<R/D<3.

### Claim 16 (depends on 15)

The imaging lens assembly module of claim 15, wherein the maximum diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.20<dmin/D<0.45.

### Claim 17 (depends on 15)

The imaging lens assembly module of claim 15, wherein the diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.25<dmin/D<0.40.

### Claim 18 (depends on 15)

The imaging lens assembly module of claim 15, wherein a number of the lens elements of the imaging lens element set is N, and the following condition is satisfied:
3≤N≤8.

### Claim 19 (depends on 15)

The imaging lens assembly module of claim 15, wherein a maximum field of view of the imaging lens assembly module is FOV, and the following condition is satisfied:
3 degrees≤FOV≤40 degrees.

### Claim 20

An imaging lens assembly module, comprising:
an imaging lens element set comprising a plurality of lens elements, and having an optical axis;
a lens carrier, wherein at least one lens element of the lens elements is disposed in the lens carrier; and
a light blocking structure being a light blocking sheet mounted on the lens carrier, located on an image side of the at least one lens element, and comprising:
a light blocking opening, the optical axis passing through light blocking opening, and the light blocking opening comprising:
at least two arc portions, wherein each of the at least two arc portions has a first curvature radius, and the first curvature radius is for defining a maximum diameter of the light blocking opening; and
a shrinking portion connected to the at least two arc portions, wherein the shrinking portion comprises at least one protruding arc extending and shrinking gradually from the shrinking portion to the optical axis, and the at least one protruding arc has a second curvature radius;
wherein the light blocking structure is an aperture stop of the imaging lens assembly module for controlling an amount of an incident light of the imaging lens assembly module;
wherein the maximum diameter of the light blocking opening is D, a cross-sectional area of the light blocking opening is A, and the following condition is satisfied:
0.30<A/[π×(D/2)2]<0.95, wherein π is a ratio of a circumference of a circle to a diameter of the circle.

### Claim 21 (depends on 20)

The imaging lens assembly module of claim 20, wherein the maximum diameter of the light blocking opening is D, the cross-sectional area of the light blocking opening is A, and the following condition is satisfied:
0.50<A/[π×(D/2)2]<0.90, wherein π is the ratio of the circumference of the circle to the diameter of the circle.

### Claim 22 (depends on 20)

The imaging lens assembly module of claim 20, wherein the maximum diameter of the light blocking opening is D, the second curvature radius of the protruding arc is R, and the following condition is satisfied:
0.01<R/D<3.

### Claim 23 (depends on 20)

The imaging lens assembly module of claim 20, wherein the maximum diameter of the light blocking opening is D, a minimum distance between the protruding arc and a center of the light blocking opening is dmin, and the following condition is satisfied:
0.20<dmin/D<0.45.

### Claim 24 (depends on 23)

The imaging lens assembly module of claim 23, wherein the diameter of the light blocking opening is D, the minimum distance between the protruding arc and the center of the light blocking opening is dmin, and the following condition is satisfied:
0.25<dmin/D<0.40.

### Claim 25 (depends on 20)

The imaging lens assembly module of claim 20, further comprising:
at least one reflecting element located on at least one side of an object side and an image side of the imaging lens element set.

### Claim 26 (depends on 20)

The imaging lens assembly module of claim 20, further comprising:
a driving device, wherein the lens carrier is a plastic injection-molded member, and the driving device is disposed on the lens carrier.