Piezoelectric elastic sheet type driving device of miniature camera

Abstract

The invention provides a piezoelectric elastic sheet type driving device of a miniature camera, which is characterized in that an upper cover and a base form a shell, and anti-hand vibration driving coils are arranged on three side surfaces of the base; an automatic focusing movable part is arranged in the base, and a power transmission piece is embedded on one side wall of the automatic focusing movable part; a hand vibration prevention movable part is arranged in the automatic focusing movable part and is suspended and supported by the upper elastic sheet and the lower elastic sheet; the piezoelectric ultrasonic motor driving unit is arranged in front of the power transmission piece of the automatic focusing movable part, and the contact end of the power transmission piece is just in contact with the vibration claw of the tuning fork structure; when the piezoelectric ultrasonic motor driving unit is started, large thrust can be generated to stir the power transmission piece, and the automatic focusing movable part is easily pushed to a required position.

Description

technical field [0001] The invention relates to a piezoelectric shrapnel type driving device for a miniature camera, in particular to a driving device providing a large thrust anti-hand vibration motor, which is a camera device suitable for current low cost and high process maturity. Background technique [0002] In the case of miniaturization of smartphone camera modules, their small lens apertures and low light-transmitting plastic materials allow significantly less light to enter the image sensor than a digital camera would otherwise receive; this requires longer exposure times, This shortcoming has also contributed to a noticeable increase in the impact of hand shake; for many years, anti-shake technology for optical images has been the most effective way to remove blur caused by unintentional hand movement or camera shake, and it is also the Quality Image quality indispensable technology. [0003] Image stabilization in smartphones can make image and video quality comp...

AI Technical Summary

Problems solved by technology

[0003] Image stabilization in smartphones enables image and video quality comparable to that of digital cameras under many operating conditions; therefore, anti-shake technology is increasingly favored by manufacturers of high-end handheld devices, and motor manufacturers have been working hard Because of its image stabilization technology and method, it can significantly increase the camera shutter speed and provide precise camera vibration suppression; on the other hand, the camera module is developing towards higher resolution and higher pixel. One of the major disadvantages is that the lens (prism) is getting bigger and bigger, relatively speaking, the weight is getting heavier and heavier, but the existing drive motor mechanism has no room for corresponding improvement, so the real problem is that because of the advanced lens The weight is increased, but the thrust of the electromagnetic drive device is not upgraded at the same time. Therefore, when using a better lens assembly, the lack of drive force is caused in the anti-shake and auto-focus system, which also seriously affects the anti- Hand shake and auto focus function

[0004] Furthermore, in the existing three-axis electromagnetic drive device for miniature cameras, for the control of the three axes, that is, the X-Y-Z axis, the upper shrapnel, the lower shrapnel and 4 suspension wires are used as the suspension system. Especially there is the defect of insufficient magnetic thrust. The general improvement method is to increase the thrust magnet in order to increase the thrust, but because of this, the volume is thicker and the cost is relatively high. These are the existing designs applied to high-pixel large The bottleneck of the high thrust of the lens that needs to be broken through

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