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Camera module autofocus actuator and control method thereof

A focal actuator and auto-focus technology, applied to instruments, viewfinders, focusing devices, etc., can solve problems such as component stacking and manufacturing

Active Publication Date: 2019-11-12
ACTUATOR SOLUTIONS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another disadvantage is associated with the manufacture of these mechanical structures, which cannot be manufactured by stacking elements on top of each other, but require the manufacture of subassemblies and the interconnection of subassemblies

Method used

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  • Camera module autofocus actuator and control method thereof
  • Camera module autofocus actuator and control method thereof
  • Camera module autofocus actuator and control method thereof

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Embodiment approach 60

[0049] exist Figure 6 A second embodiment 60 of an AF actuator according to the invention is shown in exploded view of , wherein elements corresponding to elements of the first embodiment are indicated by correspondingly numbered reference numerals. Specifically, the AF actuator 60 includes a shield 61, a housing 62, a return spring 63, two sets of rolling balls 64, a movable lens holder 65, a magnet 66, a shape memory alloy wire 67, two terminals 68, 68' , base plate 69 and flexible printed circuit board (FPC) 691 carrying Hall sensor 692 .

[0050] This embodiment is compared to figure 1 and figure 2 Some of the distinguishing features of the embodiment shown in are in particular the shape of the housing 62 and the lens holder 65, wherein the terminals 68, 68' are connected to two adjacent faces of the housing 62, the protrusion 70 Formed on the lens holder 65 so as to correspond to the corners of the housing 62 . Similarly, as in Figure 7 and Figure 8 As clearly s...

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Abstract

An autofocus actuator for a camera module and a control method thereof, the autofocus actuator comprising a shape memory alloy wire (17) as an actuating element and at least four spherical pieces (14) as sliding aids , and the autofocus actuator includes a reset elastic element (13), which is installed between the autofocus housing (12) and the lens holder and exerts force only in the direction of the optical axis.

Description

technical field [0001] The present invention relates to a novel and improved camera module autofocus (AF) actuator and method of controlling the same, wherein the camera module autofocus actuator includes a shape memory alloy (SMA) wire as an actuating element, and In particular it is relevant to camera modules of mobile phones. Background technique [0002] In general, the use of shape memory alloy wires as actuation elements offers various advantages in terms of weight, power consumption, cost over other actuation systems. [0003] Moreover, these advantages have been recognized in the field of camera modules and have been the subject of numerous patent applications, such as International Patent Applications WO 2007 / 113478, WO 2011 / 122438 and US Patent 8,159,762, all of which describe A camera module of an alloy wire, wherein the shape memory alloy wire is in contact with a lens holder (sometimes referred to in the art as a lens barrel) and secured to a camera module hous...

Claims

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Application Information

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IPC IPC(8): G03B13/36G02B7/09G03B17/02
CPCG02B7/09G03B13/36G03B17/02F03G7/065G02B7/08G03B3/00G03B2213/00G03B2217/002H04N23/671
Inventor 铃木祐亮马库斯·克普费尔罗马里科·佩里汤姆·尼古拉森艾利克斯·陈
Owner ACTUATOR SOLUTIONS