Abstract: A lighting apparatus includes a plane light-emitter 1 and a lighting device body 5 for distributing and guiding light. The above-mentioned lighting device body 5 is provided with a lighting device attachment member 6 mounted to the plane light-emitter so as to surround a luminescence side of the plane light-emitter 1, a first light guidance member 7 which is constituted by a window hole adjoining the above-mentioned lighting device attachment member and passes the above-mentioned emitted light in a direction which does not intersect perpendicularly with the luminescence side of the above-mentioned plane light-emitter, and a second light guidance member 8 which is formed in the shape of a cylinder adjoining the above-mentioned first light guidance member and passes the above-mentioned emitted light directed toward the inside of a cylinder in a direction which intersects perpendicularly with the luminescence side of the above-mentioned plane light-emitter.

Abstract: It is provided with a light emitting panel 2 in which a light emitting part 5 formed of an organic EL element (for example) is mounted at one surface, a panel support member 3 for swivelingly supporting the above-mentioned light emitting panel through a first connection part (hinge member) 6 at a lower end of the above-mentioned light emitting panel, and a seat 4 for swivelingly supporting the above-mentioned panel support member through a second connection part (pivot mechanism) 7 at a lower end of the above-mentioned panel support member. The light emitting part 5 in the above-mentioned light emitting panel is arranged such that a depression angle and an elevation angle can be adjusted by the above-mentioned first connection part 6 and a horizontal orientation can be adjusted by the above-mentioned second connection part 7.

Abstract: A game or play facilities which change contents of progress of the game or play based on physiological information of a player, thereby being capable of providing contents suitable for the player. The game or play facilities is controlled by physiological information and includes physiological signal measuring device for measuring a physiological signal of a player, mental state determination means for determining mental state of the player by comparing the physiological signal subsequently to appropriate conversion thereof with reference values, and control means with reference values, and a control device determination by the mental state determination device.

Abstract: Disclosed is a transparent piezoelectric transducer comprising, at least, a transparent vibrator and at least one plate of a piezoelectric ceramic material sandwiched between a pair of transparent electrodes, said transparent vibrator being disposed so as to be vibrated by the piezoelectric ceramic material plate, said piezoelectric ceramic material being a ceramic material which is represented by a formula:Pb.sub.1-x La.sub.x (Zr.sub.y Ti.sub.z).sub.1-x/4 0.sub.3where x and y/z are set within a region enclosed with lines successively coupling points a-b-c-d-e-a in a phase diagram (FIG. 2 of the accompanying drawings) in which a ratio (y/z) between PbZrO.sub.3 and PbTiO.sub.3 is taken on an axis of abscissas, while an La concentration (x) is taken on an axis of ordinates (where x=8.4 and y/z=65/35 at a, x=6 and y/z=55.5/44.5 at b, x=6 and y/z=50/50 at c, x=12 and y/z=50/50 at d, and x=9 and y/z=65/35 at e). The transparent transducer is excellent in both the transparency and the electroacoustic response.