KR100691245B1 - 휴대단말의 렌즈 위치오차 보정방법 - Google Patents
휴대단말의 렌즈 위치오차 보정방법 Download PDFInfo
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- KR100691245B1 KR100691245B1 KR1020060042691A KR20060042691A KR100691245B1 KR 100691245 B1 KR100691245 B1 KR 100691245B1 KR 1020060042691 A KR1020060042691 A KR 1020060042691A KR 20060042691 A KR20060042691 A KR 20060042691A KR 100691245 B1 KR100691245 B1 KR 100691245B1
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- lens
- focus value
- mobile terminal
- focus
- lens position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/958—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging
- H04N23/959—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging by adjusting depth of field during image capture, e.g. maximising or setting range based on scene characteristics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
- G02B7/38—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals measured at different points on the optical axis, e.g. focussing on two or more planes and comparing image data
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
- H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/673—Focus control based on electronic image sensor signals based on contrast or high frequency components of image signals, e.g. hill climbing method
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Optics & Photonics (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Studio Devices (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
Description
Claims (12)
- 렌즈와 피사체 사이의 거리를 조절하여 피사체의 초점을 설정하는 휴대단말의 렌즈 위치오차 보정방법에 있어서,휴대단말의 촬영모드에서 소정의 피사체를 감지하는 과정;상기 렌즈를 이동시키면서 상기 감지된 피사체에 대한 포커스 값을 검출하여 저장하는 과정;현재 검출된 포커스 값과 상기 저장된 직전 포커스 값을 비교하는 과정;상기 포커스 값의 기울기의 부호가 변경되는 경우 상기 직전 포커스 값에 대응하는 렌즈위치를 최적 초점위치로 설정하는 과정;상기 최적 초점위치로 휴대단말 렌즈를 이동시키는 과정을 포함하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 최적 초점위치로 휴대단말 렌즈를 이동시키는 과정은,휴대단말 렌즈의 스텝길이를 설정하는 단계와;휴대단말 렌즈의 이동방향을 결정하는 단계와;피사체에 대한 포커스 값을 계산하는 단계와;최대 포커스 값을 검출하여 그에 대응하는 렌즈위치를 설정하는 단계와;히스테리시스 에러를 보정하는 단계와;최적 초점위치를 결정하는 단계를 포함하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 포커스 값의 기울기는 상기 현재 검출된 포커스 값 및 상기 저장된 직전 포커스 값을 이용하여 산출하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 포커스 값의 기울기의 부호가 변경되는 경우, 상기 직전 포커스 값에 대응하는 렌즈위치로 휴대단말 렌즈를 이동시킨 후, 상기 각 과정을 소정의 회수만큼 반복하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 포커스 값의 기울기의 부호가 변경되기 전에는, 렌즈 스텝길이를 일정하게 유지하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 포커스 값의 기울기의 부호가 변경된 후에는, 렌즈 스텝길이를 가변시키는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 4항에 있어서,상기 각 과정으로 구성되는 렌즈 위치오차 보정과정이 소정의 회수만큼 반복될 때마다, 상기 포커스 값의 기울기의 부호가 변경되기 전까지의 렌즈 스텝길이는 직전의 렌즈 위치오차 보정과정에서의 렌즈 스텝길이에 비하여 소정의 비율로 축소되는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 2항에 있어서,상기 렌즈 스텝길이는 휴대단말 렌즈의 1회 이동거리인 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 휴대단말은 소정의 렌즈이동수단을 구비하고,상기 렌즈이동수단은 휴대단말 렌즈의 움직임을 제어하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 9항에 있어서,상기 소정의 렌즈이동수단은 보이스 코일모터 및 판 스프링을 포함하여 구성되는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 1항에 있어서,상기 휴대단말의 렌즈 위치오차는 휴대단말의 히스테리시스 특성으로 인하여 발생하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
- 제 11항에 있어서,상기 휴대단말의 렌즈 위치오차는 휴대단말의 렌즈이동수단에 공급하는 전류량을 제어하여 보정하는 것을 특징으로 하는 휴대단말의 렌즈 위치오차 보정방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020060042691A KR100691245B1 (ko) | 2006-05-11 | 2006-05-11 | 휴대단말의 렌즈 위치오차 보정방법 |
DE602007013138T DE602007013138D1 (de) | 2006-05-11 | 2007-04-25 | Mobiles Gerät und Autofokus Verfahren |
EP07106936A EP1855135B1 (en) | 2006-05-11 | 2007-04-25 | Mobile Terminal and Auto-Focusing Method Using a Lens Position Error Compensation |
US11/801,672 US7693411B2 (en) | 2006-05-11 | 2007-05-10 | Mobile terminal and auto-focusing method using a lens position error compensation |
Applications Claiming Priority (1)
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KR1020060042691A KR100691245B1 (ko) | 2006-05-11 | 2006-05-11 | 휴대단말의 렌즈 위치오차 보정방법 |
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KR100691245B1 true KR100691245B1 (ko) | 2007-03-12 |
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US (1) | US7693411B2 (ko) |
EP (1) | EP1855135B1 (ko) |
KR (1) | KR100691245B1 (ko) |
DE (1) | DE602007013138D1 (ko) |
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KR101114046B1 (ko) | 2007-09-07 | 2012-04-12 | 콸콤 인코포레이티드 | 렌즈 진동을 감쇠시키기 위한 방법 및 장치 |
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CN101785297B (zh) * | 2007-09-07 | 2013-02-13 | 高通股份有限公司 | 用于阻尼透镜振动的方法及装置 |
US8190015B2 (en) | 2007-09-07 | 2012-05-29 | Qualcomm Incorporated | Method and device for damping lens vibration |
WO2009045680A3 (en) * | 2007-10-01 | 2010-05-27 | Allegro Microsystems, Inc. | Hall-effect based linear motor controller |
US8084969B2 (en) | 2007-10-01 | 2011-12-27 | Allegro Microsystems, Inc. | Hall-effect based linear motor controller |
US8716959B2 (en) | 2007-10-01 | 2014-05-06 | Allegro Microsystems, Llc | Hall-effect based linear motor controller |
WO2009045680A2 (en) * | 2007-10-01 | 2009-04-09 | Allegro Microsystems, Inc. | Hall-effect based linear motor controller |
US9784594B2 (en) | 2007-10-01 | 2017-10-10 | Allegro Microsystems, Llc | Hall-effect based linear motor controller |
US7936144B2 (en) | 2008-03-06 | 2011-05-03 | Allegro Microsystems, Inc. | Self-calibration algorithms in a small motor driver IC with an integrated position sensor |
CN112585518A (zh) * | 2020-03-27 | 2021-03-30 | 深圳市大疆创新科技有限公司 | 对焦点的确定方法、装置、镜头、成像装置和可移动平台 |
Also Published As
Publication number | Publication date |
---|---|
US20080124068A1 (en) | 2008-05-29 |
DE602007013138D1 (de) | 2011-04-28 |
US7693411B2 (en) | 2010-04-06 |
EP1855135B1 (en) | 2011-03-16 |
EP1855135A1 (en) | 2007-11-14 |
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