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Control method used for camera module and camera module

A technology of camera module and control method, which is applied in the directions of image communication, camera focusing device, projector focusing device, etc., and can solve the problems of optical path eccentricity, easy shaking, and large structure

Active Publication Date: 2015-01-07
GALAXYCORE SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Digital cameras, especially ultra-thin digital cameras, use telescopic lens groups to solve this problem, such as mechanical transmission structures such as screw / nut structures, gear structures, or worm gear structures, but such structures are relatively large and cannot be placed on mobile phones. , laptops, Pads and other thinner devices
However, the lens barrel of the voice coil motor commonly used in existing thin and light equipment cannot extend out of the camera module, and can only be used for automatic focusing. It cannot realize the function of stretching and contracting the lens group during work, so it cannot solve the above-mentioned camera module height. Problems caused by getting lower and lower
In addition, in the existing camera module, in order to keep the lens barrel in a certain position, it is necessary to continuously supply current to the coil to balance the elastic force of the elastic body. When moving, due to the lack of guiding structure in the direction of the optical axis, it is easy to shake, resulting in the eccentricity of the optical path and affecting the image quality

Method used

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  • Control method used for camera module and camera module
  • Control method used for camera module and camera module
  • Control method used for camera module and camera module

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0067] figure 2 Is an exploded schematic view of the structure of the camera module according to the first embodiment of the present invention, image 3 Is a side cross-sectional view of the camera module along the optical axis according to the first embodiment of the present invention;

[0068] It can be seen from the figure that the camera module according to the present invention includes: an imaging module 12, a sleeve module 20, and a device arranged in the sleeve module 20 that can correspond to the movement of the sleeve module 20 relative to the optical axis. The lens module 30, at least one coil 7 (in this embodiment, one coil), at least one magnetic component 4 (in this embodiment, eight magnetic components that can be combined into a circle), the lens module 30 directly or indirectly Ground is pressed against the sleeve module 20; there is radial pressure between the lens module 30 and the sleeve module 20, and the friction force along the optical axis is generated bet...

no. 2 example

[0083] Please also refer to Figure 4 , Figure 5 , Picture 8 , Picture 9 , Picture 10 , Figure 4 Is a schematic structural decomposition diagram of a camera module according to a second embodiment of the present invention; Figure 5 Is a side cross-sectional view of the camera module along the optical axis direction according to the second embodiment of the present invention;

[0084] The driving unit is controlled by the power supply control device to make the current passed through the coil 7'pulse-like, so that the lens module 30' realizes discontinuous movement. The lens module 30' mainly includes a moving carrier 6', The ratio of the absolute value of the maximum value to the minimum value of the pulse current of the lens (not marked) inside the moving carrier 6'is at least 1.2, which is 2 times in this embodiment, and the single pulse width of the pulse current is less than 2s. In this embodiment, it is 1s. At the first moment, the drive unit passes the initial current...

no. 3 example

[0099] Please refer to Image 6 , Figure 7 . Image 6 Is a schematic structural decomposition diagram of a camera module according to a third embodiment of the present invention;

[0100] Figure 7 It is a top view of the camera module according to the third embodiment of the present invention along the optical axis; it can be seen from the figure that the camera module according to the present invention includes: imaging module 12", sleeve module 20", and In the sleeve module 20", the lens module 30" can correspond to the movement of the sleeve module 20 relative to the optical axis direction (this part can refer to the first embodiment, but the lens module 30" in this embodiment is not provided with friction Component), at least one coil 7" (in this embodiment, a coil), at least one magnetic component 4" (in this embodiment, two magnetic components that can be combined into vertically arranged, but not (Limited), the elastic component 9" arranged between the lens module 30" an...

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Abstract

The invention provides a control method for a camera module. The camera module comprises an imaging module, a sleeve module, a camera lens module, at least one coil and at least one magnetic component, wherein the camera lens module is arranged in the sleeve module and can move corresponding to the sleeve module relative to the optical axis direction. The control method includes the steps that the camera lens module is directly or indirectly pressed to the sleeve module in a leaning mod, radial pressure is formed between the camera lens module and the sleeve module, friction force in the optical axis direction is generated between the camera lens module and the sleeve module by the pressure, and the camera lens module is kept in the static state relative to the sleeve module in the optical axis direction due to the friction force; currents are directly provided for the coil by wires, the coil and the magnetic components are selectively matched with the camera lens module, and electromagnetic force in the optical axis direction is borne by the camera lens module and serves as the driving force for the camera lens module to do linear motion in the optical axis direction so as to drive the camera lens module to move.

Description

Technical field [0001] The present invention relates to a control method for a camera module and a camera module, wherein the camera module can control the movement direction and movement distance of the lens barrel to realize the telescopic and / or focusing functions of the lens barrel. Background technique [0002] The camera module consists of a photosensitive chip and an imaging lens group. The imaging lens group is placed in the lens barrel of the module. Only when the position of the lens barrel and the photosensitive chip are organically matched can high-quality images or videos be obtained. Modern handheld devices, on the one hand, are designed to be thinner and thinner for aesthetics, and the height of the camera module is also lower and lower, corresponding to the total height of the lens group. On the other hand, for the needs of image quality, the photosensitive chip The angular size of the photosensitive surface is getting larger and larger. How to ensure that the fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/04G03B13/34H04N5/232
CPCG02B7/04G03B13/34H04N23/54H04N23/65
Inventor 赵立新侯欣楠
Owner GALAXYCORE SHANGHAI