Lens driving apparatus, camera module, and camera-mounted apparatus
US-2023016060-A1 · Jan 19, 2023 · US
Optical element driving device with voltage boosted piezoelectric element, camera module, and camera-mounted device
US12571981B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12571981-B2 |
| Application number | US-202218685550-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 19, 2022 |
| Priority date | Aug 26, 2021 |
| Publication date | Mar 10, 2026 |
| Grant date | Mar 10, 2026 |
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- Title
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Abstract
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An optical element driving device according to the present invention comprises a moving part which is capable of holding an optical element, a driving part which drives the moving part by vibrating a piezoelectric element, and a voltage-raising part which raises input voltage that is input into the piezoelectric element, wherein the voltage-raising part has an inductor connected in series to the piezoelectric element and a capacitor connected in parallel to the piezoelectric element. A camera module according to the present invention comprises an optical element driving device and an imaging part which captures a subject image formed by an optical element. A camera-mounted device according to the present invention comprises a camera module and an image processing part which processes image information acquired by the camera module.
First claim
Opening claim text (preview).
The invention claimed is: 1 . An optical element driving device comprising: a movable part configured to hold an optical element; a driving part configured to drive the movable part by vibrating a piezoelectric element; and a boost part configured to boost an input voltage input to the piezoelectric element, wherein the boost part includes an inductor connected in series to the piezoelectric element, and a capacitor connected in parallel to the piezoelectric element the movable part includes a magnet; and the boost part is disposed at a substrate including a position detection part disposed to face the magnet and configured to magnetically detect a position of the movable part. 2 . The optical element driving device according to claim 1 , wherein the inductor is disposed at a position not facing the magnet in the substrate. 3 . The optical element driving device according to claim 1 , wherein the position detection part is disposed at a surface of the substrate on a side facing the magnet, and the inductor and the capacitor are disposed at a surface of the substrate on a side not facing the magnet. 4 . A camera module comprising: the optical element driving device according to claim 1 ; and an image capturing part configured to capture a subject image formed by the optical element. 5 . A camera-mounted device that is an information device or a transport device, the camera-mounted device comprising: the camera module according to claim 4 ; and an image processing part configured to process image information obtained by the camera module.
Assignees
Inventors
Classifications
using retaining rings or springs (G02B7/027 takes precedence) · CPC title
Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title
using piezoelectric actuators · CPC title
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
with mechanism for focusing or varying magnification · CPC title
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- What does patent US12571981B2 cover?
- An optical element driving device according to the present invention comprises a moving part which is capable of holding an optical element, a driving part which drives the moving part by vibrating a piezoelectric element, and a voltage-raising part which raises input voltage that is input into the piezoelectric element, wherein the voltage-raising part has an inductor connected in series to th…
- Who is the assignee on this patent?
- Ishikawa Masahiro, Osaka Tomohiko, Mitsumi Electric Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G02B7/09. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 10 2026 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).