Abstract: This vibrating mirror element includes a mirror portion reflecting light, a torsionally deformable beam portion connected to the mirror portion for supporting the mirror portion in a vibratile manner, and a driving portion having a connecting portion connected with the beam portion for driving the mirror portion through the torsionally deformable beam portion. The width of the connecting portion of the driving portion is rendered smaller than the width of a portion of the driving portion other than the connecting portion in plan view.

Abstract: This vibrating mirror element includes a pair of first beam portions supporting a mirror portion in a vibratile manner, a pair of second beam portions connected with the pair of first beam portions respectively, and a pair of driving portions connected with the pair of second beam portions respectively. The mirror portion is arranged in a region surrounded by the pair of second beam portions and the pair of driving portions. The width of the pair of first beam portions and the width of the pair of second beam portions are rendered smaller than the width of the pair of driving portions.

Abstract: A vibrating mirror element includes a base member, a substrate made of metal, integrally formed with a mirror portion, a movable portion swingably supporting the mirror portion from both sides and functioning as a lower electrode, and a mounting portion supporting the movable portion and mounted on the base member, a piezoelectric film provided on the movable portion of the substrate and vibrating the mirror portion by application of a periodic voltage, and an upper electrode provided on the piezoelectric film.

Abstract: A detection surface of an optical detector is divided into regions C, E, F, G, and H. The optical detector outputs detection signals corresponding to the amounts of light incident on the respective regions. A position detection controller calculates an image projection position based on timing at which a laser beam is incident on region C. A laser control circuit adjusts the intensity of the laser beam emitted by a laser based on laser beam intensities detected in regions E to H arranged around region C.

Abstract: In a piezoelectric element having a substrate, a lower electrode layered on the substrate, a piezoelectric body made of ceramic layered on top of the lower electrode and an upper electrode layered on the piezoelectric body, wherein a first metal layer is provided between the substrate and the lower electrode, a second metal layer is provided between the lower electrode and the piezoelectric body, and the first metal layer and the second metal layer are made of a metal selected from among metals of which the ionization tendency is not less than that of Cu, oxides of metals of which the ionization tendency is not less than that of Cu, and alloys of metals of which the ionization tendency is not less than that of Cu.

Abstract: A scanning position of laser light applied to a projection plane is detected, and based on the detected scanning position, a synchronization signal is generated to designate a scan timing. A correction region detection portion detects whether or not a part corresponding to a prescribe region of an image on the projection plane is scanned by laser light, based on the generated synchronization signal. When the part corresponding to the prescribed region is scanned, a correction amount derivation portion corrects a gradation signal based on the difference between the detected quantity of laser light and a prescribed quantity of light to be output from the laser for displaying the image in the prescribed region.

Abstract: This vibrating element includes a movable portion driven to vibrate at a prescribed resonance frequency, a driving portion vibrating the movable portion by cyclically supplying a pulse signal and a detecting portion detecting the vibrational state of the movable portion, while the driving portion is so formed as to supply the pulse signal at a first frequency substantially identical to the resonance frequency of the movable portion at least in starting and to cyclically supply the pulse signal at a second frequency smaller than the first frequency in detection of the vibrational state of the movable portion.

Abstract: A first light output unit integrally has a first light source and a first prism, a second light output unit integrally has a second light source and a second prism, and a third light output unit integrally has a third light source and a third prism. A first surface of the first prism and a second surface of the second prism are adhered together by an adhesive with a first film located therebetween, and first film passes green laser light and reflects blue laser light. A third surface of the second prism and a fourth surface of the third prism are adhered together by an adhesive with a second film located therebetween, and second film passes the green laser light and the blue laser light, and reflects red laser light.

Abstract: In a piezoelectric element having a substrate, a lower electrode layered on the substrate, a piezoelectric body made of ceramic layered on top of the lower electrode and an upper electrode layered on the piezoelectric body, wherein a first metal layer is provided between the substrate and the lower electrode, a second metal layer is provided between the lower electrode and the piezoelectric body, and the first metal layer and the second metal layer are made of a metal selected from among metals of which the ionization tendency is not less than that of Cu, oxides of metals of which the ionization tendency is not less than that of Cu, and alloys of metals of which the ionization tendency is not less than that of Cu.