Unlock instant, AI-driven research and patent intelligence for your innovation.

Camera module

A camera module and lens technology, applied in the field of cameras, can solve the problems of Hall sensor measurement interference, Hall sensor small displacement detection error, etc., and achieve the effect of accurate displacement compensation and clear shooting pictures

Pending Publication Date: 2018-12-25
惠州市桑莱士智能科技股份有限公司
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the voice coil motor drives the lens through the interaction of the magnetic field generated by the coil and the magnet. The magnet is fixed and the coil is movable. When the coil is energized, the magnetic field of the magnet forms a force on the coil, thereby realizing the The drive of the lens, and the Hall sensor is to measure the lens according to the magnetic field change of the magnet, and assist the feedback operation to make the compensation displacement as accurate as possible, while the Hall sensor in the prior art is only a single one, which is set on the magnet The single side of the magnet is used to detect the change of the magnetic field of the magnet. When the lens moves slightly, the change of the magnetic field is very small. The current flow in other electronic components in the camera module will generate a small magnetic field, and these magnetic fields will affect the Hall sensor. The measurement causes interference, which in turn leads to an error in the detection of the small displacement of a single Hall sensor. For example, the patents related to the anti-shake camera disclosed in the two patents of application number CN201420820058.6 and CN201420536455.0 have not considered this problem.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Camera module
  • Camera module
  • Camera module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] refer to figure 1 with figure 2 , figure 1 It is a schematic structural diagram of the camera module in this embodiment, figure 2 It is a structural schematic diagram of the voice coil motor, the Hall sensor and the micro magnet in this embodiment. The camera module in this embodiment includes an RFPC board 1, a gyroscope 2, an OIS control driver 3, a voice coil motor part 4, a lens 5, and a Hall sensor 6, wherein the number of the Hall sensors 6 is two.

[0024] RFPC board 1, which is a combination of soft and hard circuit boards, is a new type of circuit board. The hard board part is the same as the PCB board, has a certain thickness and strength, can install electronic components and withstand certain mechanical forces, and the soft board part makes the circuit Part of the board can be bent to achieve three-dimensional installation; the camera module in this embodiment uses a combination of soft and hard boards just to consider that the camera module will have a...

Embodiment 2

[0029] refer to figure 1 with image 3 , image 3It is a structural schematic diagram of a voice coil motor, a Hall sensor and a micro magnet in another embodiment. The difference between the camera module in this embodiment and the previous embodiment is that the two Hall sensors 6 are respectively located on two adjacent sides of the voice coil motor 4 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a camera module, which comprises an RFPC board, a gyroscope, an OIS control driver and a voice coil motor device arranged on an RFPC board. The voice coil motor device comprises a voice coil motor and a housing sleeved outside the voice coil motor. The gyroscope and the voice coil motor are respectively connected with the OIS control driver. A lens arranged in the voice coil motor, the lens leaking out of the housing; and two Hall sensors arranged in the housing; two Hall sensors are located on both sides of the voice coil motor. Both hall sensors are connected to the OIS control driver. The invention provides two mutually verifiable displacement parameters for the OIS control driver through the setting of the Hall sensor, and compares the two displacement parameters with the tiny displacement amount measured by the gyroscope, so that the displacement compensation caused by the lens dithering is more accurate, and the shooting picture is clear.

Description

technical field [0001] The present invention relates to the technical field of cameras, in particular to a camera module. Background technique [0002] OIS (Optical image stabilization), the principle of anti-shake when shooting the lens is that the lens is magnetically wrapped and in a suspended state. When the photo is shaken, the gyroscope detects a small movement, and then converts the shake information into The electrical signal is sent to the OIS control driver, and the driver immediately calculates the amount of displacement that needs to be compensated, and then drives the voice coil motor to control the movement of the lens through the driver IC to compensate the image generated by the shake, so as to ensure that the shake will not affect the image shooting effect, while the Hall sensor The position information of the lens is fed back to the OIS control driver to form a closed-loop control. Among them, the voice coil motor drives the lens through the interaction of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/225G03B5/00
CPCG03B5/00H04N23/50H04N23/55H04N23/54
Inventor 段炎徐平
Owner 惠州市桑莱士智能科技股份有限公司