Method for realizing minisize camera automatic focusing and minisize camera thereof

Abstract

A method for realizing automatic focusing of a miniature camera and the miniature camera thereof, the miniature camera includes a housing, a lens installed at the front end of the housing, a sensor including an imaging photosensitive device and a phase detection unit installed in the housing, and the adjustment distance is calculated according to the sensor detection signal and the direction controller and the focus adjustment mechanism for automatically aligning the photosensitive surface of the sensor with the focal plane, the focus adjustment mechanism is an electromagnetically driven position adjustment mechanism, its movable end is connected with the sensor, and the other end is fixed at the rear of the housing end, after receiving the control signal output by the controller to adjust the position and direction, drive its movable end to move, and drive the photosensitive surface of the sensor to move to the position of the focal plane. The invention adopts electromagnetic drive, which reduces the difficulty in the structural design and production process of the camera phone, further reduces the production cost of the phone, and is beneficial to the popularization and popularization of the camera phone with the auto-focus function.

Description

technical field [0001] The invention relates to a method and device for adjusting the focus of a miniature camera, which is applicable to various miniature cameras, including those used in mobile phones. Background technique [0002] No matter how complicated the structure of the camera lens is, it can actually be regarded as a convex lens. From the basic optical principles, we can see that light from any direction other than the axis of the convex lens will be refracted after passing through the convex lens and meet at the One point, the intersection point of these rays is called the focal point, and the plane composed of all points on the clear imaging position is usually called the focal plane. For those objects in the focal plane, the camera can clearly shoot them, and the front and back of the focal plane The farther away the scene, the blurrier the image. For objects with different distances from the lens, after passing through the lens, it is necessary to focus to ob...

AI Technical Summary

Problems solved by technology

If it is applied to the miniature camera of a camera phone, it will directly lead to a higher cost of the phone, which limits its application on the camera of a camera phone

This is also the reason why there are few types of camera phones with auto-focus function on the market, so that they cannot meet the needs of mass consumers for camera phones with auto-focus functions.

Images