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Electrostatic actuator, shutter device, imaging module, and camera

A shutter and brake technology, applied in the field of cameras, can solve the problem of camera body thinning

Inactive Publication Date: 2009-02-11
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of these two techniques is to make the camera body thinner by protruding the glass cover of the imaging unit including the imaging element into the shutter unit (see Japanese Patent Laid-Open No. 11-218838)

Method used

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  • Electrostatic actuator, shutter device, imaging module, and camera
  • Electrostatic actuator, shutter device, imaging module, and camera
  • Electrostatic actuator, shutter device, imaging module, and camera

Examples

Experimental program
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Effect test

no. 1 example

[0176] The first embodiment of the camera module is the same as the camera module described in connection with the first embodiment of the shutter device. Therefore, it will not be described in detail.

[0177] [Second embodiment of camera module]

[0178] Figure 18 is a cross-sectional view of a second embodiment of the camera module according to the present invention.

[0179] The second embodiment of the camera module differs from the first embodiment in that the fixing part 1 a also serves as the glass cover 29 . The same components as those of the first embodiment are denoted by the same reference numerals and will not be described in detail in terms of structure or operation.

[0180] In the second embodiment, the glass cover 29 is not required. Therefore, the camera module can be thinner. This is an advantage that the second embodiment has in addition to the advantages of the first embodiment.

no. 3 example

[0182] Figure 19 is a sectional view showing the structure of the shutter unit provided in the third embodiment of the camera module according to the present invention.

[0183] The third embodiment differs from the first embodiment in that a light transmission control film 31 is provided on the protective member 25 . Thus, the same components as those of the first embodiment are denoted by the same reference numerals and will not be described in detail in terms of structure or operation. Since the camera unit 22 is the same as that of the second embodiment, it is not Figure 19 shown in the example.

[0184] The light transmission control film 31 is a filter that adjusts the amount of incoming light in order to perform appropriate imaging and obtain an image containing desired information. The light transmission control film 31 may be an ND filter, a light quantity control film 31a such as an electrochromic element, an infrared filter 31b that passes a light beam having a...

no. 4 example

[0188] Figure 20 is a sectional view showing the structure of the shutter unit provided in the fourth embodiment of the camera module according to the present invention.

[0189] The fourth embodiment differs from the third embodiment in that light transmission control films 31 ( 31 a , 31 b and 31 c ) are provided on the protective member 25 , the fixing member 1 a and the fixing member 1 b respectively. The same components as those of the third embodiment are denoted by the same reference numerals and will not be described in detail in terms of structure or operation. The camera unit 22 has the same structure as the camera unit of the second embodiment, so there is no Figure 20 shown in .

[0190] In the fourth embodiment, a plurality of light transmission control films 31 (31a, 31b, and 31c) are provided on the protective member 25, the fixing member 1a, and the fixing member 1b, respectively. Therefore, they overlap each other without increasing the thickness of the c...

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PUM

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Abstract

A shutter device comprising a fixed member (1) which has a plurality of electrodes (4) arranged on a surface, a light-transmitting region which is provided in the fixed member, a light-shielding member (2) which is able to move between two positions where the light-transmitting region is closed and opened, respectively, and which have a plurality of electret parts (5), and a drive circuit (10) which periodically applies a voltage to the electrodes provided on the fixed member, thereby to generate an electrostatic force acting on the electret parts of the light-shielding member and to drive the light-shielding member.

Description

technical field [0001] The present invention relates to an electrostatic actuator using an electret as a movable member, a shutter device having the electrostatic actuator, a camera module having the shutter device, and a video camera having the shutter device. Background technique [0002] In recent years, digital video cameras having solid-state image pickup elements that convert optical images of objects into electronic data have been widely used in various devices such as mobile phones, portable terminal devices, watches, peripheral terminals of data processing devices, digital home appliances, and the like. Under this trend, it is required that the digital video camera should perform various functions. [0003] First of all, it is required that the camera body should be light and thin. [0004] The following two techniques for thinning the camera body are known. [0005] One of these techniques is to make the camera body thinner by protruding the cover glass of the im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B9/08G03B9/36H04N5/225H04N5/238H04N101/00H02N1/00G03B30/00H04N23/75
Inventor 松木薰金子新二外川刚川合澄夫
Owner OLYMPUS CORP