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Lens controlling method and terminal of camera module

A technology of a camera module and a control method, which is applied to the parts of color TVs, the parts of TV systems, installation, etc., can solve the problems of abnormal noise of the camera module and damage to the lens structure.

Active Publication Date: 2014-12-17
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a camera module lens control method and terminal to solve the problems of abnormal noise and lens structure damage caused by sudden power failure of the camera module without changing the structure

Method used

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  • Lens controlling method and terminal of camera module
  • Lens controlling method and terminal of camera module
  • Lens controlling method and terminal of camera module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to figure 1 , shows a lens control method of a camera module according to Embodiment 1 of the present invention, including the following steps.

[0027] Step 101, receiving a power-off signal of the camera module.

[0028] The terminal involved in the present invention includes a mobile phone, a PAD, a notebook computer, etc. with a camera. The camera includes a camera module. When the camera program is entered, the power supply supplies power to the camera module to provide driving current to the motor. When the user enters other programs, or has a new incoming call, or the terminal automatically shuts down and needs to exit the camera program, a power-off signal of the camera module is generated. In the prior art, when the power-off signal of the camera module is received, the Correspondingly, the power supply of the camera module is cut off, but the driving current of the motor is also cut off immediately, causing the lens to lose the force of the motor and qu...

Embodiment 2

[0036] refer to figure 2 , shows a lens control method of a camera module according to Embodiment 2 of the present invention, including the following steps.

[0037] Step 201, receiving a camera module power-off signal.

[0038] Step 202, acquiring the current position of the lens.

[0039] In the embodiment of the present invention, the distance from the initial position of the lens to the farthest position from the CCD is decomposed into several distances of equal length, each distance is a unit distance, and the length value of the unit distance is a step value. Since the lens moves the lens by controlling the current of the drive motor when focusing, the current value can be read to obtain the step value of the lens from the starting position.

[0040] Step 203, determine whether the lens is at the initial position, if the lens is at the initial position, perform step 206, otherwise perform step 204.

[0041] Whether the lens is at the initial position can be judged b...

Embodiment 3

[0049] refer to image 3 , shows a lens control method of a camera module according to Embodiment 3 of the present invention, including the following steps.

[0050] Step 301, receiving a camera module power-off signal.

[0051] Step 302, acquiring the current position of the lens.

[0052] Step 303, determine whether the lens is at the initial position, if the lens is at the initial position, perform step 307, otherwise perform step 304.

[0053] Step 304, if the lens is not at the initial position, then judge whether the step value between the current position of the lens and the initial position is greater than the maximum threshold, if greater than the maximum threshold, then perform step 305; otherwise, perform step 307.

[0054] The maximum threshold in this embodiment is the preset maximum value for the lens to move back from the position represented by this value to the initial position at one time without abnormal noise and structural damage. For example, suppose the...

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Abstract

The invention provides a lens controlling method of a camera module and relates to the field of camera modules. The lens controlling method includes the following steps that a power failure signal of the camera module is received; when a lens is not located at an initial position, the lens is controlled to move stage by stage towards the initial position till the lens returns to the initial position; a power supply of the camera module is cut off. According to the lens controlling method of the camera module, the lens moves stage by stage towards the initial position in stead of suddenly returning under the action of elastic force of an elastic piece, and abnormal sound and structural damage caused by collision of the lens with other components can be avoided.

Description

technical field [0001] The present invention relates to the field of camera modules, in particular to a camera module lens control method and terminal. Background technique [0002] At present, the camera devices installed on the terminal generally have an auto-focus function. Focusing is a key step to ensure clear imaging. imaging surface. For example, cameras with voice coil motors commonly used on mobile phones include a suspension device wound with a coil, a magnet, a lens located in the suspension device, and a shrapnel used to maintain the suspension device. When the coil is energized, the magnet located outside the coil Interacting with the electric current makes the suspension device move against the elastic force of the shrapnel for automatic focusing. [0003] When actually using the camera function of terminals such as mobile phones or pads, when the user finishes taking pictures and exits the camera application, a crash sound will appear in the camera module. ...

Claims

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Application Information

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IPC IPC(8): H04N5/232
CPCG02B7/102G02B7/023
Inventor 邱绪东王洪成
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD