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Imaging device and portable terminal with this

A camera device and lens technology, applied in the field of portable terminal devices and camera devices, to achieve the effect of reducing manufacturing costs

Inactive Publication Date: 2008-09-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, autofocus is a mechanism that automatically moves the lens to adjust the focus according to the distance from the lens to the subject, but it cannot be adjusted at all distances. Possibility bounds exist on side and infinite side focus

Method used

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  • Imaging device and portable terminal with this
  • Imaging device and portable terminal with this
  • Imaging device and portable terminal with this

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0057] Hereinafter, an imaging device according to an embodiment of the present invention will be described with reference to the drawings.

[0058] First, the configuration of an imaging device according to an embodiment of the present invention will be described. FIG. 1 is a block diagram showing a schematic configuration of an imaging device according to this embodiment.

[0059]As shown in FIG. 1 , the imaging device 10 of the present embodiment includes: a lens 11 for condensing light from a subject; a magnet 12 fixed to the lens 11; a lens shifter for moving the lens 11 in the optical axis direction; Unit 13; Hall element 14 that captures the magnetic flux generated by magnet 12; constant current circuit 15 that drives Hall element 14; Hall amplifier 16 that amplifies the output voltage of Hall element 14; compares the output voltage of Hall amplifier 16 with the reference A Hall comparator 17 for voltage; a PWM signal unit 18 for generating a pulse width modulation (Pu...

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PUM

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Abstract

An imaging device produced at a lower cost than conventional and a portable terminal with the imaging device are disclosed. An imaging device (10) comprises a lens (11) for focusing the light from a subject, a magnet (12) fixed to the lens (11), lens moving means (13) for moving the lens (11) along the optical axis, a Hall element (14) for capturing the magnetic flux generated from the magnet (12), a constant current circuit (15) for driving the Hall element (14), a Hall amplifier (16) for amplifying the output voltage of the Hall element (14), a Hall comparator (17) for comparing the output voltage of the Hall amplifier (16) and a reference voltage, a PWM signal section (18) for generating a pulse width modulated signal, a lens drive control section (19) for outputting a control signal for controlling the drive of the lens moving means (13), and a lens driver (20) for driving the lens moving means (13).

Description

technical field [0001] The present invention relates to an imaging device and a portable terminal device having the same. Background technique [0002] In recent years, with the advancement of image compression technology and the evolution of image sensors, products with more than 2 million pixels have appeared in imaging devices mounted in mobile phone devices. Therefore, automatic adjustment mechanisms such as automatic focus, automatic white balance, and automatic iris have come to be required in such imaging devices. [0003] Among them, autofocus is a mechanism that automatically moves the lens to adjust the focus according to the distance from the lens to the subject, but it cannot be adjusted at all distances. There are possible limits on lateral and infinite lateral focus. Therefore, the imaging device needs to control the lens to automatically move within a range determined by the boundary between the macro side and the infinity side, and prevent the lens from col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/08G02B7/02H04N5/225
CPCG02B7/08G03B3/10G03B13/36G03B17/55H04M1/0264G03B2205/0069G03B2205/0023H04N23/55
Inventor 加藤昭彦菊池纪彦草刈高
Owner PANASONIC CORP