Apparatus for controlling position of camera module
US-2018146124-A1 · May 24, 2018 · US
Auto-focusing apparatus having asymmetric supporting structure
US10156773B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10156773-B2 |
| Application number | US-201715832364-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 5, 2017 |
| Priority date | Dec 20, 2016 |
| Publication date | Dec 18, 2018 |
| Grant date | Dec 18, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Disclosed is an auto-focusing apparatus having an asymmetric supporting structure, which includes a first frame having a magnet; a second frame having an AF coil for moving the first frame in an optical axis direction; a first ball group located between the first frame and the second frame and having a number of balls arranged along the optical axis direction; and a second ball group located between the first frame and the second frame at a position different from the first ball group and having a number of balls arranged along the optical axis direction. The first ball group include two first support balls having a greater size than the other balls in the first ball group, and the second ball group includes two second support balls having a greater size than the other balls in the second ball group.
First claim
Opening claim text (preview).
What is claimed is: 1. An auto-focusing apparatus having an asymmetric supporting structure, comprising: a first frame having a magnet; a second frame having an AF coil for moving the first frame in an optical axis direction; a first ball group located between the first frame and the second frame and having a n (n is a natural number of 4 or above) number of balls arranged along the optical axis direction; and a second ball group located between the first frame and the second frame at a position different from the first ball group and having a m (m is a natural number of 4 or above) number of balls arranged along the optical axis direction, wherein the first ball group includes two first support balls having a greater size than the other balls in the first ball group, and the second ball group includes two second support balls having a greater size than the other balls in the second ball group; wherein the first support balls are located at both ends of the first ball group, and wherein the second support balls are located at a center of the second ball group and adjacent to each other. 2. The auto-focusing apparatus having an asymmetric supporting structure according to claim 1 , wherein the first support balls and the second support balls have the same size. 3. The auto-focusing apparatus having an asymmetric supporting structure according to claim 1 , wherein the n and the m are 4, and wherein the first support balls are located at first and fourth positions in the first ball group based on the optical axis direction, and the second support balls are located at second and third positions in the second ball group based on the optical axis direction. 4. The auto-focusing apparatus having an asymmetric supporting structure according to claim 1 , wherein the first frame has first and second guiding grooves extending along the optical axis direction, wherein the second frame has first and second accommodating grooves respectively facing the first and second guiding grooves, and wherein the first ball group is located between the first guiding groove and the first accommodating groove, and the second ball group is located between the second guiding groove and the second accommodating groove. 5. The auto-focusing apparatus having an asymmetric supporting structure according to claim 4 , wherein at least one of the first guiding groove and the first accommodating groove has a V-shaped cross section.
Assignees
Inventors
Classifications
- G03B13/36Primary
Autofocus systems · CPC title
adapted for automatic focusing or varying magnification · CPC title
using electromagnetic actuators, e.g. voice coils · CPC title
- G02B7/08Primary
adapted to co-operate with a remote control mechanism · CPC title
- G03B3/10Primary
Power-operated focusing · CPC title
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- What does patent US10156773B2 cover?
- Disclosed is an auto-focusing apparatus having an asymmetric supporting structure, which includes a first frame having a magnet; a second frame having an AF coil for moving the first frame in an optical axis direction; a first ball group located between the first frame and the second frame and having a number of balls arranged along the optical axis direction; and a second ball group located be…
- Who is the assignee on this patent?
- Jahwa Electronics Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G03B13/36. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 18 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).