Digital camera module

• US 20070097218A1
• Filed: 06/23/2006
• Published: 05/03/2007
• Est. Priority Date: 10/28/2005
• Status: Active Grant

• Current Assignee: Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Chen, Ga-Lane
• Granted Patent: US 7,701,507 B2
• Time in Patent Office: Days
• US Class Current: 348/208.7
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/57 Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices

Abstract

A digital camera module (100) includes a lens module (110), an image sensor (120) and a linear voice coil actuator (130). The lens module further includes a lens set (111), an infrared cut filter (112), a spacer set (113) and a barrel (114). The image sensor is a CCD or a CMOS. The linear voice coil actuator includes an elongated soft magnetic core (131), a tubular permanent magnet (132) positioned parallel to the axis of the core, a sliding holder (133) and a coil (134) attached to the sliding holder and positioned to interact with the permanent magnet along the axis of the core. The digital camera module further includes a servo-controller (140) for controlling the movement of the linear voice coil actuator.

Claims

1. A digital camera module comprising:

a lens module configured for transmitting an image;

an image sensor configured for receiving the image transmitted from the lens module and converting the image from a light signal form into an electronic signal form; and

a linear voice coil actuator configured for driving the image sensor to move so as to properly receive the image transmitted from the lens module.

2. The digital camera module as claimed in claim 1, wherein the lens module further comprises a lens set, an infrared cut filter, a spacer set and a barrel receiving the lens set and the infrared cut filter therein.

3. The digital camera module as claimed in claim 2, wherein the lens set comprises at least a glass aspheric lens and at least a plastic aspheric lens.

4. The digital camera module as claimed in claim 3, wherein the aspheric lens has an anti-reflective film formed on at least one surface thereof

5. The digital camera module as claimed in claim 1, wherein the image sensor is a CCD.

6. The digital camera module as claimed in claim 1, wherein the image sensor is a CMOS.

7. The digital camera module as claimed in claim 1, wherein the linear voice coil actuator comprises:

an elongated soft magnetic core;

a tubular permanent magnet receiving the elongated soft magnetic core therein;

a coil surrounding and moveable relative to the elongated soft magnetic core; and

a sliding holder having

a fixing portion received in the tubular permanent magnet and fixedly coupled to the coil,

a driving portion configured for driving the image sensor to move, and

a connecting portion interconnecting the fixing portion with the driving portion.

8. The digital camera module as claimed in claim 7, wherein the tubular permanent magnet has a slit configured for allowing the connecting portion to extend therethrough and to be slidable therein.

9. The digital camera module as claimed in claim 7, wherein the digital camera module further includes a servo-controller for controlling movement of the coil of the linear voice coil actuator.

10. The digital camera module as claimed in claim 7, wherein the image sensor is attached to the driving portion of the sliding holder of the linear voice coil actuator and is arranged in the tubular permanent magnet.

11. The digital camera module as claimed in claim 7, wherein the image sensor is attached to the driving portion of the sliding holder of the linear voice coil actuator and is arranged outside the tubular permanent magnet.

12. The digital camera module as claimed in claim 1, wherein a step resolution of the linear voice coil actuator is in a range of 0.01 micrometers to 0.02 micrometers.