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Drive device, image acquisition device, and electronic equipment

A technology of image acquisition device and drive device, which is applied in image communication, television, installation, etc., to achieve the effect of reducing resonance

Inactive Publication Date: 2013-11-13
MAXELL HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above problems have not been fundamentally solved

Method used

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  • Drive device, image acquisition device, and electronic equipment
  • Drive device, image acquisition device, and electronic equipment
  • Drive device, image acquisition device, and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0067] Below, refer to Figure 1 to Figure 18 , the first embodiment of the present invention will be described.

[0068] Such as Figure 1 to Figure 3 As shown, the camera assembly (image acquisition device) 150 has a flexible circuit board 10, a connector 11, an image sensor (camera section, camera mechanism) 12, a transparent substrate 13, a chassis (main body, casing) 20, a lens unit (lens Parts) 30, cover 50 and screws 55.

[0069] A connector 11 is arranged at one end of the flexible printed circuit 10 . The image sensor 12 mounted on the transparent substrate 1313 is arranged at the other end of the flexible circuit board 10 . These components are arranged on the image sensor 12 in the order of the square transparent substrate 13 , the case 20 , the lens unit 30 , the cover 50 , and the screws 55 . In addition, the lower end surface of the case 20 is fixed on the flexible circuit board 10 with a black adhesive. Thereby, it is possible to suppress the intrusion of e...

no. 2 approach

[0145] refer to Figure 19A and Figure 19B A second embodiment of the present invention will be described. Figure 19A The shown camera unit 150 corresponds to the camera unit of the first embodiment, and differs from the first embodiment in that the piezoelectric element 42 is provided on the object side. Figure 19B The shown camera module 150 corresponds to the camera module of this embodiment.

[0146] From Figure 19A and Figure 19B It can be clearly seen from the comparison that, in this embodiment, the piezoelectric element 42 is fixed on the lens holder 31 . Specifically, the piezoelectric element 42 is fixed on the support plate 32 of the lens holder 31 . Even in this case, the same effect as that of the first embodiment can be obtained. As long as the piezoelectric element 42 is fixed on the support plate 32, the camera module 150 can be easily assembled.

no. 3 approach

[0148] refer to Figure 20 to Figure 21B A third embodiment of the present invention will be described. In this embodiment, as a modified example of the first embodiment, an infrared cut filter 55 is provided on the opening OP2 formed in the partition wall portion 22 . By blocking invisible light rays such as near-infrared rays and infrared rays, superimposition of noise components on the image captured by the image sensor 12 can be effectively suppressed. In addition, the shaft holding portion 45 holds the propeller shaft 44 by the elastic force of the spring. Even in this case, the same effect as that of the first embodiment can be obtained.

[0149] Such as Figure 20 As shown, in this embodiment, the width Ta of the connecting body of the piezoelectric element 42 and the transmission shaft 44 along the y-axis is equal to or less than the width Tb of the lens holder 31 along the y-axis. In other words, Ta≦Tb is satisfied when Ta is the width of the connecting body forme...

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PUM

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Abstract

A drive device in which the frequency of a drive waveform applied to a piezoelectric element is easily settable with less obligation to consider resonance in a stationary member. The device includes a piezo element that expands and contracts according to a drive voltage, a transmission shaft that receives vibration produced by the element, a stationary member that holds the transmission shaft in a slidable state along the longitudinal direction of the transmission shaft, and a lens holder that is displaced together with the piezo element and transmission shaft relative to the stationary member according to drive of the piezo element. The piezo element and the transmission shaft move in the moving direction of the lens holder in synchronization with the lens holder according to drive of the piezo element in the state where the piezo element is spaced from the stationary member. By employing this structure, the frequency of the drive waveform applied to the piezo element can be set easily without considering resonance in the stationary member.

Description

technical field [0001] The invention relates to a drive device, an image acquisition device and electronic equipment. Background technique [0002] In recent years, imaging devices such as video cameras have been incorporated into various products. When a video camera is mounted on a small electronic device such as a mobile phone or a notebook computer, miniaturization of the video camera itself is strongly demanded. [0003] There are cases where an autofocus lens is incorporated into the camera. Under such circumstances, miniaturization of an actuator for lens displacement is strongly desired. As a small actuator, there is known a structure in which a moving object is displaced by driving a piezoelectric element (see Patent Document 1). In this actuator, a shaft connected to the piezoelectric element transmits vibrations accompanying application of a voltage waveform to the piezoelectric element to a lens barrel slidably fitted on the shaft. By appropriately setting th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/04G02B7/08H04N5/225H04N5/232
CPCH02N2/025H04N5/2254H04N1/00307G02B7/08H04N5/2257H04N23/57H04N23/55
Inventor 川村等谷学莲田大信太郁夫青木进田口圭佑
Owner MAXELL HLDG LTD