APPARATUS FOR CONTROLLING OPERATION OF VOICE COIL MOTOR AND METHOD THEREOF
The present invention relates to the control of an operation of a voice coil motor (hereinafter referred to as "VCM") for moving a lens of a camera module and, particularly, to a method for controlling an operation of a VCM, which can reduce noise and shorten a movement time of a lens duri...
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Zusammenfassung: | The present invention relates to the control of an operation of a voice coil motor (hereinafter referred to as "VCM") for moving a lens of a camera module and, particularly, to a method for controlling an operation of a VCM, which can reduce noise and shorten a movement time of a lens during the initial operation or landing of the lens. The method comprises the steps of: applying, to a VCM, a current which linearly increases with a first slope to a predetermined first inflection point in response to a camera operation command; and moving a lens to an infinite position by applying, to the VCM, a current which linearly increases with a second slope smaller than the first slope from the inflection point to the infinite position.
La présente invention concerne la commande d'un fonctionnement d'un moteur à bobine acoustique (appelé ci-après "VCM") permettant de déplacer une lentille d'un module de caméra, et l'invention concerne en particulier un procédé permettant de commander le fonctionnement d'un VCM, qui permet de réduire le bruit et de raccourcir un temps de déplacement d'une lentille pendant le fonctionnement initial ou l'atterrissage de la lentille. Le procédé comprend les étapes consistant à : appliquer, à un VCM, un courant qui augmente linéairement avec une première inclinaison jusqu'à un premier point d'inflexion prédéterminé en réponse à une instruction de fonctionnement de caméra ; et déplacer une lentille vers une position infinie en appliquant, au VCM, un courant qui augmente linéairement avec une seconde inclinaison inférieure à la première inclinaison du point d'inflexion à la position infinie.
본 발명은 카메라 모듈의 렌즈를 이동시키는 보이스 코일 모터(Voice Coil Motor:이하 VCM이라 함)의 구동제어에 관한 것으로, 특히 렌즈 초기 구동 혹은 랜딩(landing) 시에 소음을 저감시키고 이동시간을 단축시킬 수 있는 VCM 구동제어방법에 관한 것으로, 카메라 동작 명령에 응답하여 미리 설정된 제1변곡점까지 제1기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하는 단계와, 상기 변곡점에서 인피니트 포지션까지 상기 제1기울기보다 작은 제2기울기를 가지고 선형 증가하는 전류를 상기 VCM에 인가하여 렌즈를 인피니트 포지션으로 이동시키는 단계를 포함함을 특징으로 한다. |
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