Abstract:
A sliding bearing is constructed by an upper split bearing half and a lower split bearing half. The upper split bearing half has a sliding surface, in which an oil groove which allows a lubricating oil to flow therein is formed over the entire circumferential extent of the sliding surfaced. The oil groove extends through a crush relief to be open to a junction area, and the oil groove has a bottom which is formed so that a portion disposed toward the junction area as considered in the circumferential direction of the crush relief is located closer to the center of the upper split bearing half in comparison to a central portion. An ingress in large quantities of foreign particles within the oil groove onto the sliding surface of the sliding bearing and into a connecting rod bearing after passing through a lubricating oil feed passage is suppressed, and an oil leakage through the crush relief is reduced, allowing a lubricating oil pressure to be secured and augmented.
Abstract:
A planar light-emitting device has a plurality of light-emitting units each having a lightguide plate having an upper surface as a light-exiting surface, a lower surface opposite to the light-exiting surface, a peripheral side surface extending between the respective peripheral edges of the upper surface and the lower surface, and a light entrance surface defined by a part of the peripheral side surface. Each light-emitting unit further has a light-emitting set adjacent to the light entrance surface to emit light into the lightguide plate through the light entrance surface, and a support member that fixedly supports the light source and the lightguide plate. The light-emitting units are arranged side by side so that the light-exiting or upper surfaces of their respective lightguide plates are substantially flush with each other.
Abstract:
A modulation error measurement device according to the present invention receives a demodulated signal containing a demodulated I signal and a demodulated Q signal from a quadrature demodulator receiving an RF signal output by a quadrature modulator and applying the quadrature demodulation to the received RF signal, and measures a quadrature error corresponding to a phase difference between an I component and a Q component of the modulated signal. The quadrature modulator applies quadrature modulation to an original I signal (ω1) and an original Q signal (ω2) having frequencies different from each other. The modulation error measurement device includes an I-frequency-phase deriving unit 14I which derives the phase of a component of an I frequency (ω1) of the demodulated signal, an opposite-sign I-frequency-phase deriving unit which derives the phase of a component of an opposite-sign I frequency (−ω1) of the demodulated signal, a Q-frequency-phase deriving unit which derives the phase of a component of a Q frequency (ω2) of the demodulated signal, and an opposite-sign Q-frequency-phase deriving unit which derives a phase of a component of an opposite-sign Q frequency (−ω2) of the demodulated signal.
Abstract:
A planar light-emitting device allowing for high luminance uniformity has a plurality of light-emitting units (4), each including a lightguide plate (3) having a light-exiting surface, an opposite surface opposite to the light-exiting surface, a peripheral side surface extending between the respective peripheral edges of the light-exiting surface and the opposite surface, and a light-entrance surface (3a) defined by a part of the peripheral side surface. Each light-emitting unit further includes a light source (2) adjacently disposed to face the light-entrance surface to emit light into the lightguide plate through the light-entrance surface. The light-emitting units are arranged in a plurality of mutually adjacent rows with the light-exiting surfaces (3a) of their respective lightguide plates being substantially flush with each other. Adjacent rows of the light-emitting units are displaced relative to each other in the direction of the rows.
Abstract:
A lens comprising a transparent member having at least two surfaces, and a Fresnel lens surface provided on each of the two surfaces of the transparent member, the transparent member including a generally plate-like shape having a first surface and a second surface opposing the first surface, the Fresnel lens surface being provided on each of the first and second surfaces of the transparent member.
Abstract:
A backlight unit includes a planar light source member that has a light-emitting surface and that emits light having directivity in a perpendicular direction to the light-emitting surface. An optical member has a light-receiving surface opposed to the light-emitting surface of the planar light source member and a light-emitting surface opposite to the light-receiving surface. The light-receiving surface has a multiplicity of prisms. By the prism action, the optical member emits the light having directivity in the perpendicular direction from the planar light source member as light having directivity in at least two directions on opposite sides of the perpendicular direction. The directions of light directivity are changed by varying the apex angle of the prisms.
Abstract:
A lens comprising a transparent member having at least two surfaces, and a Fresnel lens surface provided on each of the two surfaces of the transparent member, the transparent member including a generally plate-like shape having a first surface and a second surface opposing the first surface, the Fresnel lens surface being provided on each of the first and second surfaces of the transparent member.
Abstract:
A case is provided for mounting an electronic equipment such as a potable telephone. The case has a first display panel and a second display panel provided on both sides thereof and disposed back to back. A light guide plate is provided in the case, the light guide plate has light emitting surfaces on both sides thereof, and light sources are provided at one of sides of light guide plate. The light sources are divided into a first light source for the first display panel and a second light source for the second display panel. An electric current supply circuit is provided for independently supplying electric current to the first light source and to the second light source.
Abstract:
A method for correcting an amplitude error between an I signal and a Q signal which are outputted from a quadrature detector including a first multiplier for multiplying a reference signal and a measured signal, a first integrator for smoothing the output of the first multiplier to generate the I signal, a 90-degree phase shifter for generating an auxiliary reference signal from the reference signal, a second multiplier for multiplying the auxiliary reference signal and the measured signal, and a second integrator for smoothing the output of the second multiplier to generate the Q signal. The method includes the step of inputting the auxiliary reference signal, instead of the reference signal, to the first multiplier to obtain a first output signal and inputting the reference signal, instead of the auxiliary reference signal, to the second integrator to obtain a second output signal. Then a correction coefficient for amplitude error correction is calculated from at least one of a ratio between the Q signal and the first output signal and a ratio between the I signal and the second output signal.
Abstract:
A terminal for a piezoelectric device has a first electrode portion, a second electrode portion folded on the first electrode portion, projections on the first and second electrode portions, and further a vibration absorber between the first and second electrode portions. As the vibration absorber, oil, a non-volatile component of oil, silicone grease, polyamide resin, paper, an anticorrosive, a coating agent, silicone rubber, etc. may be used. Another terminal for a piezoelectric device has a sealant between the first electrode portion and the second electrode portion.