Position detection device

A technology for detection devices and detection parts, which is applied in printing devices, focusing devices, projection devices, etc., can solve problems such as poor image quality, high power consumption, and long imaging time, so as to shorten the time spent and reduce power consumption volume effect

Active Publication Date: 2014-10-01
ASAHI KASEI ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned software method, compared with the optical method, there is a problem of poorer image quality, and since the imaging time also includes the processing time of the software, there is a disadvantage of longer imaging time
[0007] In addition, the above-mentioned device of Patent Document 1 includes an autofocus mechanism and a shake correction mechanism, and the use of a permanent magnet for the autofocus mechanism and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0071] Embodiment 1

[0072] figure 1 It is a figure for demonstrating an example of Embodiment 1 of the position detection apparatus of this invention. In the figure, reference numeral 1 represents a lens, reference numeral 2 represents a permanent magnet (X-axis OIS magnet and AF magnet), reference numeral 3 represents an autofocus (AF) coil, and reference numeral 4 represents an AF position Sensor (Hall element), reference numeral 5 represents a coil for X-axis OIS, reference numeral 6 represents a position sensor (Hall element) for X-axis OIS, reference numeral 111 represents the optical axis of the lens, and reference numeral 113 represents The axis direction of the autofocus (AF) coil, and reference numeral 115 denotes the axis direction of the X-axis OIS coil.

[0073] The position detection device of the present invention is a position detection device that detects the position of the lens 1 in a plane perpendicular to the optical axis direction of the lens 1 to detect t...

Example Embodiment

[0132] Embodiment 2

[0133] Picture 10 (a), Picture 10 (b) is a configuration diagram for explaining the second embodiment of the position detection device of the present invention, Picture 10 (a) is a top view, Picture 10 (b) is a bottom view. The reference numeral 31 in the figure denotes an elastic member (spring (Japanese: Baba or Sprinkle)), and the reference numeral 32 denotes a post (power supply terminal). In addition, the pair has and figure 2 with image 3 The same reference numerals are attached to the components with the same functions in the above.

[0134] Such as Picture 10 (a), Picture 10 As shown in (b), it includes: a driving body 11b which holds the lens 11a; four pillars 32 which are provided at the four corners of the housing 21 as power supply terminals for supplying drive current; and four power supply terminals Two spring members (springs (Japanese: バネ or Sprinkle)) connected to the driving body 11b each of the support 32. In addition, the driving...

Example Embodiment

[0167] Embodiment 3

[0168] Figure 22 Is a perspective view for explaining Embodiment 3 of the position detection device of the present invention, Figure 23 Yes Figure 22 The top view of the position detection device shown is a view of the position detection device from the direction of the optical axis a of the lens. Reference numeral 12A in the figure denotes a permanent magnet (a magnet for A-axis OIS and a magnet for AF), reference numeral 12B denotes a magnet for B-axis OIS, reference numeral 13 denotes an autofocus (AF) coil, and reference numeral 14 Reference numeral 15A represents a Hall element for AF, reference numeral 15A represents a coil for A-axis OIS (shake correction), reference numeral 15B represents a coil for B-axis OIS, reference numeral 16A represents a Hall element for A-axis OIS, reference numeral 16B Indicates a Hall element for B-axis OIS, reference numeral 17 represents a yoke, reference numeral 18 represents an AF drive shaft, reference numeral 19A...

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Abstract

The present invention relates to a position detection device in which an autofocus mechanism and an optical image stabilizer mechanism using a closed loop control have been achieved. The device is configured so that a shared magnet is used for autofocus and for optical image stabilization, so as to decrease the size. The autofocus mechanism is for moving a lens (1) along the optical axis (Z axis) of the lens, and the optical image stabilizer mechanism is for moving the lens in the direction orthogonal to the optical axis. The permanent magnet (2) is fixed to the lens (1) and follows the movement of the lens (1), and position sensors (4, 6) detect the amount of the movement thereof. The shared magnet (2), which serves as the permanent magnet (2) for autofocusing by the autofocus mechanism and the permanent magnet (2) for optical image stabilization by the optical image stabilizer mechanism, is provided close to the lens.

Description

technical field [0001] The present invention relates to a position detection device, and more specifically, to such a position detection device, which includes: a position sensor for auto focus (AF), which detects the position of the lens in the direction of the optical axis; An image-shake correction (OIS) position sensor that detects the position of the lens in a plane perpendicular to the optical axis direction; and a position detection device that uses magnets for both AF and OIS, and achieves miniaturization by sharing the magnets for AF and OIS. Background technique [0002] In recent years, opportunities to capture still images using compact cameras for mobile phones have continued to increase. Along with this, various optical image stabilization (OIS; Optical Image Stabilizer / hereinafter referred to as "Optical Image Stabilizer" / hereinafter referred to as "OIS") have been proposed, which can prevent image blurring on the imaging surface and enable clear shooting even...

Claims

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Application Information

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IPC IPC(8): G03B5/00G02B7/04G02B7/08
CPCG02B7/08G03B3/10H04N5/23287G03B2205/0007G03B2205/0053G02B27/646G03B5/00G03B2217/005H04N23/57H04N23/55H04N23/67H04N23/6812H04N23/687G03B5/04H04N23/54
Inventor 笠松新
Owner ASAHI KASEI ELECTRONICS CO LTD
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