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Focusing compensation device for camera module and method thereof, and photographing terminal

A camera module and compensation device technology, which is applied in focusing devices, image communication, color TV components, etc., can solve the problems affecting the focusing speed and accuracy of the camera module, so as to improve the photographing experience and effect, and improve the speed and accuracy. The effect of precision

Inactive Publication Date: 2018-03-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The focus compensation device of the camera module, its method, and the camera terminal provided by the embodiments of the present invention are used to solve the technical problem that the focusing speed and precision of the camera module will be affected when the motor of the camera module has unrecoverable deformation.

Method used

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  • Focusing compensation device for camera module and method thereof, and photographing terminal
  • Focusing compensation device for camera module and method thereof, and photographing terminal
  • Focusing compensation device for camera module and method thereof, and photographing terminal

Examples

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no. 1 example

[0026] In order to solve the problem that the reed of the voice coil motor is damaged when the camera module in the mobile camera is used for a long time or receives an external impact, the original focus parameters are still used in the case of irreversible permanent deformation of the reed Taking pictures and focusing will reduce the speed and accuracy of focusing, which will affect the effect of taking pictures and the user experience. The present invention provides a focus compensation device. The device detects whether the reed has permanent deformation, and if so, obtains the camera The original focus parameters, and the theoretical drive current before the deformation and the actual drive current after the deformation are calculated, and the focus compensation parameters of the camera module are determined according to the actual and theoretical drive currents, and the focus is compensated when taking pictures according to the compensation parameters.

[0027] See figur...

no. 2 example

[0044] Please refer to figure 2 It is a flow chart of the focus compensation method of the camera module provided by the second embodiment of the present invention. The focus compensation method provided in this embodiment specifically includes the following processing steps:

[0045] S201. Acquire the original focus parameters of the camera module, the original focus parameters are specifically obtained from the memory in the camera module, and the original focus parameters include a near-focus original focus parameter group and a far-focus original focus parameter group , each group of original focus parameters specifically includes the description K related to the magnetic field strength of the voice coil motor in the camera module, the coil length of the voice coil motor, and the reed, and the image distance b in the original state; the original state here refers to It is the state where the reed in the voice coil motor has no irreversible permanent deformation; the imag...

no. 3 example

[0081] Please refer to Figure 4 , Figure 4 It is a structural diagram of the camera terminal provided by the third embodiment of the present invention. The camera terminal 2 provided in this embodiment includes: a camera module 21, a controller 22, and a focus compensation device 1 of the camera module, wherein:

[0082] The focus compensation device 1 acquires the original focus parameters of the camera module, and measures the object distance between the sensor and the object to be photographed under the shooting state of completing autofocus, and determines the actual driving current value under the object distance; according to the object distance Calculate the theoretical drive current value with the original focus parameters, determine the focus compensation parameters according to the actual drive current value and the theoretical drive current value, and perform focus compensation on the camera module.

[0083] The controller 22 performs focus compensation on the c...

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Abstract

The embodiment of the invention provides a focusing compensation device for a camera module and a method thereof, and a photographing terminal. Original focusing parameters of the camera module are obtained by an obtaining module; under a photographing state in which the automatic focusing is finished, a measurement module measures an object distance of a photographed object and determines an actual driving current value under the object distance; a calculation module calculates a theoretical driving current value according to the object distance and the original focusing parameters; and at last, focusing compensation parameters are determined according to the actual driving current and the theoretical driving current and focusing compensation is performed on the camera module. The focusing compensation parameters after deformation are determined according to the actual driving current and the theoretical driving current, so the effect that the focusing compensation is performed according to real-time parameters is implemented, and the focusing accuracy, precision and efficiency of the camera module in the automatic focusing are guaranteed; and meanwhile, the photographing qualityof the camera module and the experience degree of a user are also improved.

Description

technical field [0001] The present invention relates to the technical field of camera modules, in particular to a focus compensation device for a camera module, a method thereof, and a camera terminal. Background technique [0002] At present, the autofocus camera module is generally equipped with a memory inside, which can burn some parameter information related to taking pictures and focusing. In the prior art, for the focus of the camera module, when the camera module leaves the factory, the motor parameters of the near focus and the far focus will be burned in the memory, and the camera module can be quickly adjusted by using this parameter when taking pictures. focus. [0003] However, the camera module of each terminal mountain has a limited service life, especially the motor in the camera module. When used for a long time or subjected to external force impact, it may cause irreversible permanent damage to the reed connected to the motor. At this time, if the focus i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
CPCH04N23/67G03B13/36
Inventor 高谦者王秋
Owner ZTE CORP
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