Electronic device

Patent metadata

Field	Value
Publication number	US-12287458-B2
Application number	US-202117383184-A
Country	US
Kind code	B2
Filing date	Jul 22, 2021
Priority date	Sep 18, 2020
Publication date	Apr 29, 2025
Grant date	Apr 29, 2025

Abstract

An electronic device includes at least two image capturing units which face the same side. The at least two image capturing units include a first image capturing unit and a second image capturing unit. The first image capturing unit includes an optical image system and a first image sensor. The optical image system includes a first lens element and an image surface. The first image sensor is disposed on the image surface of the optical image system thereof and has a first resolution of at least 60 megapixels. The second image capturing unit includes an optical image system and a second image sensor. The optical image system includes a first lens element and an image surface. The second image sensor is disposed on the image surface of the optical image system thereof and has a second resolution of at least 40 megapixels.

First claim

What is claimed is:

1. An electronic device, comprising at least two image capturing units facing a same side, wherein the at least two image capturing units comprise:
a first image capturing unit, comprising an optical image system and a first image sensor, wherein the optical image system comprises, in order from an object side to an image side along an optical path, a first lens element, a second lens element, a third lens element, a fourth lens element, a last lens element and an image surface, a total number of lens elements of the optical image system of the first image capturing unit is five, and the optical image system further comprises an aperture stop; the first image sensor is disposed on the image surface of the optical image system of the first image capturing unit, and the first image sensor has a first resolution of at least 60 megapixels; and
a second image capturing unit, comprising an optical image system and a second image sensor, wherein the optical image system comprises, in order from an object side to an image side along an optical path, a first lens element and an image surface; the second image sensor is disposed on the image surface of the optical image system of the second image capturing unit, and the second image sensor has a second resolution of at least 40 megapixels;
wherein in the first image capturing unit, the first lens element has positive refractive power, the second lens element has negative refractive power and an image-side surface being concave in a paraxial region thereof, and the last lens element has an image-side surface being concave in a paraxial region thereof;
wherein an equivalent focal length of the optical image system of the first image capturing unit is fs_1, an equivalent focal length of the optical image system of the second image capturing unit is fs_2, a focal length of the optical image system of the first image capturing unit is f_1, a focal length of the optical image system of the second image capturing unit is f_2, a maximum field of view of the optical image system of the first image capturing unit is FOV_1, a maximum field of view of the optical image system of the second image capturing unit is FOV_2, and the electronic device satisfies the following conditions:
30.0 [mm]≤ fs _1≤150.0 [mm];

10.0 [mm]≤ fs _2≤30.0 [mm];

15.0 [mm]< f _1+ f _2<45.0 [mm]; and
20.0 [deg.]<FOV_2−FOV_1<80.0 [deg.];

wherein a focal length of the optical image system is f, half of a maximum field of view of the optical image system is HFOV, a distance along an optical axis between the aperture stop and the image-side surface of the last lens element of the optical image system is SD, a distance along the optical axis between the image-side surface of the last lens element and the image surface of the optical image system is BL, and the optical image system of the first image capturing unit satisfies the following conditions:
3.2 [mm]< f ×tan(HFOV)<8.0 [mm]; and

0.20< SD/BL< 1.40;

wherein an Abbe number of the first lens element of the optical image system is V1, an Abbe number of the second lens element of the optical image system is V2, an Abbe number of the third lens element of the optical image system is V3, an Abbe number of the fourth lens element of the optical image system is V4, an Abbe number of the last lens element of the optical image system is V5, an Abbe number of the i-th lens element of the optical image system is Vi, and at least two lens elements of the optical image system of the first image capturing unit satisfy the following condition:
Vi< 23.0, wherein i= 1, 2, 3, 4 or 5.

2. The electronic device of claim 1 , wherein a distance along an optical axis between an object-side surface of the first lens element and the image surface of the optical image system is TL, the focal length of the optical image system is f, and the optical image system of the first image capturing unit satisfies the following condition:
0.20< TL/f< 1.05.

3. The electronic device of claim 1 ,
wherein a minimum value among Abbe numbers of all lens elements of the optical image system is Vdmin, and the optical image system of the first image capturing unit satisfies the following condition:
9.0< Vd min<20.0.

4. The electronic device of claim 1 , wherein a total number of lens elements of the optical image system of the second image capturing unit is at least eight; in the second image capturing unit, the optical image system further comprises a last lens element disposed between the first lens element and the image surface along the optical path, the last lens element has an image-side surface being concave in a paraxial region thereof and having at least one convex critical point in an off-axis region thereof, and the second image sensor has a diagonal length larger than 9.0 millimeters;
wherein a minimum value among Abbe numbers of all lens elements of the optical image system is Vdmin, and the optical image system of the second image capturing unit satisfies the following condition:
9.0< Vd min<20.0.

5. The electronic device of claim 1 , wherein the first image capturing unit further comprises a reflective element, at least two lens elements of the optical image system of the first image capturing unit are made of plastic material, and the second resolution of the second image sensor is at least 60 megapixels;
wherein the focal length of the optical image system is f, an entrance pupil diameter of the optical image system is EPD, and the optical image system of the first image capturing unit satisfies the following condition:
3.0≤ f /EPD<4.5.

6. The electronic device of claim 1 , wherein the focal length of the optical image system is f, half of the maximum field of view of the optical image system is HFOV, the optical image system of the first image capturing unit satisfies the following condition: 4.20 [mm]<f×tan(HFOV)<8.0 [mm]; and the optical image system of the second image capturing unit satisfies the following condition: 5.0 [mm]<f×tan(HFOV)<9.0 [mm].

7. The electronic device of claim 1 , wherein the second resolution of the second image sensor is at least 50 megapixels;
wherein an f-number of the optical image system is Fno, an entrance pupil diameter of the optical image system is EPD, a maximum image height of the optical image system is ImgH, and the optical image system of the first image capturing unit satisfies the following conditions:
18.0 [mm]<Fno×EPD<40.0 [mm]; and

0.75<EPD/ImgH<2.20.

8. The electronic device of claim 1 , wherein at least one lens surface of lens elements of the optical image system of the first image capturing unit is aspheric, and the second resolution of the second image sensor is at least 60 megapixels;
wherein an Abbe number of a lens element having positive refractive power of the optical image system is Vp, and at least one lens element with positive refractive power of the optical image system of the first image capturing unit satisfies the following condition:
Vp< 21.0.

9. The electronic device of claim 1 , wherein the first image capturing unit achieves an image of an equivalent focal length between 200 mm and 500 mm with a portion of the first resolution of the first image sensor, which is at least 10 megapixels; and the second image capturing unit achieves an image of an equivalent focal length between 30 mm and 100 mm with a portion of the second resolution of the second image sensor, which is at least 10 megapixels;
wherein the maximum field of view of the optical image system is FOV, the optical image system of the first image capturing unit satisfies the following condition: 15 [deg.]<FOV<50 [deg.], and the optical image system of the second image capturing unit satisfies the follow

Assignees

• Largan Precision Co Ltd

Inventors

• Huang Hsin-Hsuan
• Yeh Kuan-Ting
• Wang Kuo-Jui
• Tseng Yu-Tai

Classifications

• G03B30/00 Primary

  Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles · CPC title

• G02B13/0065

  having a beam-folding prism or mirror · CPC title

• G02B9/64

  having more than six components · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/45

  for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images · CPC title