PROBLEM TO BE SOLVED: To improve uniformity of movable speed of a reflection surface.SOLUTION: A drive device of an optical deflector moving a reflection surface by deformation generated when voltage is applied to a first piezoelectric part and a second piezoelectric part, which are adjacent to each other, comprises: first application means for applying first drive voltage having a predetermined wave form to the first piezoelectric part; second application means for applying second drive voltage having a different wave form from that of the first drive voltage to the second piezoelectric part; and control means for controlling drive of the first application means and the second application means. The control means performs control to make first start time at which the first application means starts applying the first drive voltage different from second start time at which the second application means starts applying the second drive voltage.SELECTED DRAWING: Figure 20
【課題】反射面の可動速度の均一性を向上する。【解決手段】隣り合う第1圧電部と第2圧電部がそれぞれ電圧印加されて生じる変形により、反射面を可動させる光偏向器の駆動装置であって、前記第1圧電部に所定の波形の第1駆動電圧を印加する第1印加手段と、前記第2圧電部に第1駆動電圧の波形とは異なる第2駆動電圧を印加する第2印加手段と、前記第1印加手段と前記第2印加手段の駆動を制御する制御手段と、を備え、前記制御手段は、前記第1印加手段が前記第1駆動電圧の印加を開始する第1開始時間と、前記第2印加手段が前記第2駆動電圧の印加を開始する第2開始時間とが異なるように制御する。【選択図】図20
DRIVE DEVICE, OPTICAL DEFLECTION SYSTEM, OPTICAL SCANNING SYSTEM, IMAGE PROJECTION DEVICE, OBJECT RECOGNITION DEVICE AND DRIVE METHOD
駆動装置、光偏向システム、光走査システム、画像投影装置、物体認識装置、及び駆動方法
2018-01-11
Patent
Elektronische Ressource
Japanisch
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B81B Mikrostrukturbauelemente oder -systeme, z.B. mikromechanische Bauelemente , MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |
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