To appropriately correct an error in the deflection angle of a reflection unit of an optical deflector.SOLUTION: An optical deflector comprises: a reflection unit; driving beams that drivably support the reflection unit; a support part that supports the driving beams; piezoelectric driving units that are provided on the driving beams and drive the reflection unit through displacement of piezoelectric elements according to the waveform of a driving voltage; and a driving voltage waveform output unit that outputs, to the piezoelectric driving units, a first driving voltage waveform 302a in which a period 351a of a waveform having a positive inclination included in one cycle has at least a waveform period 352a having a first inclination and a waveform period 353a having a second inclination different from the first inclination, and a second driving voltage waveform 302b in which a period 351b of a waveform having a negative inclination included in one cycle has at least a waveform period 352b having a third inclination and a waveform period 353b having a fourth inclination different from the third inclination. The waveforms having the second inclination and the fourth inclination are provided in periods according to a variation in piezoelectric constant of the piezoelectric elements.SELECTED DRAWING: Figure 22

    【課題】光偏向装置の反射部の振れ角誤差を適切に補正すること。【解決手段】光偏向装置は、反射部と、前記反射部を駆動可能に支持する駆動梁と、前記駆動梁を支持する支持部と、前記駆動梁に設けられ、駆動電圧の波形に応じた圧電素子の変位により前記反射部を駆動させる圧電駆動部と、1周期内に含まれる正の傾きの波形の期間351aが、少なくとも第1の傾きの波形期間352a、及び前記第1の傾きとは異なる第2の傾きの波形期間353aを有する第1の駆動電圧波形302aと、1周期内に含まれる負の傾きの波形の期間351bが、少なくとも第3の傾きの波形期間352b、及び前記第3の傾きとは異なる第4の傾きの波形期間353bを有する第2の駆動電圧波形302bを前記圧電駆動部に出力する駆動電圧波形出力部と、を有し、前記第2の傾き及び前記第4の傾きの波形は、前記圧電素子の圧電定数の変動に応じた期間に設けられる。【選択図】図22


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    Titel :

    OPTICAL DEFLECTOR, IMAGE PROJECTION DEVICE, LASER HEAD LAMP, AND MOVABLE BODY


    Weitere Titelangaben:

    光偏向装置、画像投影装置、レーザヘッドランプ及び移動体


    Beteiligte:

    Erscheinungsdatum :

    2020-07-02


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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 / G01S RADIO DIRECTION-FINDING , Funkpeilung / G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen



    OPTICAL DEFLECTOR, IMAGE PROJECTION DEVICE, AND MOVABLE BODY

    MOCHIDA AKITOSHI / KAMAYA TOMOHIKO | Europäisches Patentamt | 2020

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