Digital camera device with self-focusing system and method thereof

Abstract

A digital camera shooting device consists of a main controller unit an image transducer, an image processing unit, a storage unit, a keyboard unit and output interface, a lens unit and automatic focusing circuit and a microprocessor. In addition, the present invention discloses also an automatic focusing method by using electric voltage to regulate focal length.

Description

field of invention [0001] The invention relates to a digital camera device, in particular to a digital camera device with an automatic focus system and an automatic focus method. Background technique [0002] In the existing camera technology, an automatic focus system is usually used. During the shooting process of the image, the distance between the camera device and the object is often changed, so the image is often blurred due to exceeding the depth of field range. In order to keep the image clear, it is necessary to change the focus position of the lens during the viewfinder process to keep the image clear. This process of adjusting the focus position is called focusing or focusing. [0003] Autofocus technology has been widely used in imaging fields such as cameras, video cameras, and image scanning. It enables the imaging system to automatically adjust the position of the focusing lens group in the lens according to the distance of the objec...

AI Technical Summary

Problems solved by technology

Its feature is that it has the advantages of correct long-distance focus and no parallax in focus. The disadvantage is that it cannot work normally when the light is too dark and the contrast of the object is low.

[0006] However, the method of changing the focus position of the imaging device by changing the position of the focusing lens through a mechanical transmission device has a defect in that due to the limitation of the precision of the mechanical transmission device during work, the loss of function will occur during the shooting process, making the work The efficiency is reduced, and the ability of quick response is insufficient; at the same time, the mechanical structure inside the camera device is too complicated. For today's rapid development of science and technology, under the modern consumption concept that every product strives for exquisiteness, this is obviously a big deficiency.

Since the traditional autofocus device needs to give enough space to the lens and the transmission device to adjust the movement forward and backward when using the mechanical transmission device, the size of the camera device will be increased in space, and the camera device will increase its volume. question

[0007] Finally, in the traditional camera device, there is the problem of unclear imaging caused by the errors of the mechanical transmission mechanism and the lens during the process of processing and installation.

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