Abstract:
To provide a piezoelectric transformer which can reduce the capacity of an input unit and realize a impedance matching with a drive circuit of an input side. A piezoelectric transformer includes: a piezoelectric substrate (11) having both main surfaces of a rectangular shape; and input side electrodes (12, 13, 15, 16) and output side electrodes (14, 17) formed on the both main surfaces of the piezoelectric substrate (11). A pair of opposing input side electrodes (12, 13, 15, 16) are arranged on the both surfaces of the piezoelectric substrate (11) in the first input unit (A1) and the second input unit (A2). At least one of the pair of input side electrodes (12, 13, 15, 16) is a partial electrode arranged at the center portion of the main surface of the piezoelectric substrate (11) in the first input unit (A1) and the second input unit (A2).
Abstract:
A liquid-ejection head unit includes a head, an electric-circuit board, electronic components, and a storage tank. The head includes a frame member and ejects droplets of liquid. The electronic components are mounted on the electric-circuit board and connected to the head. The storage tank stores liquid supplied to the head. The electric-circuit board is disposed between the frame member of the head and the storage tank to form a single multi-layered structure. The electronic components of the electric-circuit board are accommodated in at least one of a first internal space defined by the frame member of the head and the electric-circuit board and a second internal space defined by the electric-circuit board and the storage tank.
Abstract:
A disclosed optical scanning device includes: a plurality of light beam irradiation devices irradiating a light beam; a deflector deflecting the plural light beams irradiated from the light beam irradiation devices into substantially opposite directions; scanning optical systems disposed substantially in an opposing manner relative to the deflector as a center, the scanning optical systems each scanning a scanning surface using the light beam deflected by the deflector; and at least one light screening material screening a flare light emitted from a first scanning lens in the scanning optical system so as to prevent the flare light from being projected onto a second scanning lens in the substantially opposite scanning optical system. The light screening material screening the flare light emitted from the first scanning lens is disposed more closely to the second scanning lens than to the first scanning lens.
Abstract:
A semiconductor light-emitting device that is high in luminous efficiency and that emits light which is high in color rendering property includes a semiconductor light-emitting element that emits blue light; a green fluorescent substance that absorbs the blue light and emits green light; and an orange fluorescent substance that absorbs the blue light and emits orange light, fluorescence emitted by the green fluorescent substance and the orange fluorescent substance having an emission spectrum that has a peak wavelength of not less than 540 nm and not more than 565 nm and that satisfies the relation of 0.70>PI(90)/PI(MAX)>0.55, where PI(MAX) represents an emission intensity at the peak wavelength, and PI(90) represents an emission intensity at a wavelength 90 nm longer than the peak wavelength.
Abstract:
A light emitting apparatus includes a light emitting device emitting primary light and a wavelength conversion unit absorbing a part of the primary light to emit secondary light. The wavelength conversion unit includes a first wavelength conversion unit containing at least a nanocrystalline phosphor and a second wavelength conversion unit containing a rare-earth-activated phosphor or a transition-metal-element-activated phosphor. In the light emitting device, the first wavelength conversion unit and the second wavelength conversion unit are closely stacked in order.
Abstract:
An imaging apparatus includes: a lens barrel which holds at least one optical element; an image sensor which converts an image of a photographic subject obtained by the optical element into an electrical signal; a circuit board on which the image sensor is mounted; and a fixing wall body which is a different body from the lens barrel, and where the lens barrel is mounted to an end part of the fixing wall body on a photographic subject side, and the circuit board is mounted to an end part of the fixing wall body on a side opposite to the photographic subject side by a bond structure by an adhesive agent.
Abstract:
Imaging-system bookbinding apparatus avoids cutting any folded sheets mixed into booklets it trims. Furnished with: an imaging unit; a sheet-folding unit that folds imaging-unit sheets; a stacking unit that stacks sheets from the sheet-folding or image-forming units; a cover-sheet binding unit that encases stacking-unit sheet bundles with, and binds them into, cover sheets; a trimming unit that trims true the bundle fore-edge; and a fold-position computing unit that determines where a sheet is pleated by the sheet-folding unit. The sheet-folding unit has a sheet conveyance path along which folded sheets are transported elsewhere than the stacking unit, while the fold-position computing unit in a first control mode transports to the stacking unit sheets folded over by the sheet-folding unit, and in a second control mode transports them from the sheet conveyance path elsewhere than the stacking unit.
Abstract:
A semiconductor light emitting apparatus including a semiconductor light emitting device, a green phosphor emitting green light and a red phosphor emitting red light is provided. The green phosphor is a rare earth activated inorganic phosphor, and the red phosphor is a semiconductor particle phosphor. The minimum among respective differences between respective wavelengths at local minima of an absorption spectrum of the red phosphor and the peak wavelength of an emission spectrum of the green phosphor is not more than 25 nm. An image display including the semiconductor light emitting apparatus is also provided.
Abstract:
In an actuator drive control device for an active vibration isolation support system, accumulated time of eight time intervals tn of crank pulses which are outputted at every 15 degrees of a crank angle in a vibration period corresponding to 120 degrees of the crank angle, and average accumulated time shown by a straight line connecting a start point and an end point of the line of the accumulated time are calculated. Eight deviations Δtn are calculated by subtracting the average accumulated time from the accumulated time. A variation waveform of the deviations Δtn corresponds to a variation waveform of the time interval tn of the crank pulses attributable only to the engine vibration with the influence of a variation in the engine rotational speed Ne being eliminated. Therefore, the vibration isolation function of an active vibration isolation support system can be effectively executed by controlling an actuator of the active vibration isolation support system based on the engine vibration which is estimated from the variation waveform of the time interval tn. Thus, the active vibration isolation support system is precisely controlled by accurately estimating a vibration state of the engine when the engine rotational speed increases and decreases.
Abstract:
An electromagnetic absorber formed of conductive fiber or the like, such as carbon fiber having an overall length corresponding to the wavelength of electromagnetic waves to be absorbed, is mixed into a base material to form an electromagnetic wave-absorbing pavement material. The electromagnetic wave-absorbing pavement material is used to form a pavement having an electromagnetic wave absorbing course. Further, an electromagnetic wave reflecting course is disposed under the electromagnetic wave absorbing course, and the electric length of the electromagnetic wave reflecting course is set to a predetermined value in relation to the dielectric constant so that electromagnetic waves reflecting off the surface of the electromagnetic wave absorbing course and electromagnetic waves reflecting off the electromagnetic wave reflecting course have opposite phases and thereby cancel each other out, whereby the electromagnetic waves are absorbed well. Moreover, the pavement having the electromagnetic wave absorbing course is formed such that the average dielectric constant along a plane orthogonal to a direction of thickness of the electromagnetic wave absorbing course increases from the top surface to the bottom surface thereof. With this structure, the electromagnetic waves easily enter the top surface of a surface course formed of the electromagnetic wave-absorbing pavement material. Thus, the electromagnetic waves directly reflecting off the top surface of the surface course formed of the electromagnetic wave-absorbing pavement material (i.e., directly reflected waves) are reduced, such that the proportion of the electromagnetic waves entering the surface course formed of the electromagnetic wave-absorbing pavement material is increased. As a result, the electromagnetic waves are efficiently absorbed by the electromagnetic wave absorbing course.