Abstract: A light emitting device provided with a plurality of types of light sources having different light emitting colors and with a light emission control means for allowing light to emit, during a specified period of monitoring a light emitting intensity, from at least one light source out of the plurality of types of light sources at a light emitting intensity different from that available outside the specified period. Accordingly, when a plurality of types of light sources are used, the light emitting intensities of a plurality of types of light sources can be monitored with light sensors of types fewer than the types of light sources to control while points and a brightness characteristics.

Abstract: A variable valve timing control apparatus of an internal combustion engine includes a phase change mechanism configured to control engine valve timing by changing a relative angular phase between a timing sprocket and a camshaft by braking torque application via an electromagnetic brake. A flow control valve is arranged downstream of an oil supply passage that supplies cooling oil into an inside of the phase change mechanism. The flow control valve includes a valve element configured to control a flow rate of the oil supplied into the inside of the phase change mechanism, by changing an opening area of a valve bore communicating the oil supply passage by way of an advancing/retreating motion of the valve element in the valve bore, and a temperature-sensitive member configured to create the advancing/retreating motion of the valve element responsively to a temperature of the oil.

Abstract: A variable valve timing control apparatus of an internal combustion engine, has a drive rotary member rotated by an engine crankshaft; a driven rotary member fixed to a camshaft that has a cam opening/closing an engine valve, the driven rotary member driven by the drive rotary member; a phase-change mechanism provided between the drive and driven rotary members and changing a relative rotational phase between the drive and driven rotary members; and a locking mechanism. The locking mechanism links any two of the drive rotary member, the driven rotary member and the phase-change mechanism or releases the link in accordance with temperature of the phase-change mechanism.

Abstract: A valve timing system for an internal combustion engine includes a phase alteration mechanism interposed between a driving rotator and a driven rotator and having a direction turning point at which the phase alteration direction is reversed when a movable portion of the mechanism travels from a beginning to a termination, and an operation control device for displacing the movable portion when undergoing an energization control, the movable portion being displaced toward the beginning when the energization control fails to be carried out. The rotation phase is set at a middle position between a maximum retard position and a maximum advance position when the movable portion is located at the beginning.

Abstract: A variable valve timing control apparatus of an internal combustion engine, has a drive rotary member rotated by an engine crankshaft; a driven rotary member fixed to a camshaft that has a cam opening/closing an engine valve, the driven rotary member driven by the drive rotary member; a phase-change mechanism provided between the drive and driven rotary members and changing a relative rotational phase between the drive and driven rotary members; and a locking mechanism. The locking mechanism links any two of the drive rotary member, the driven rotary member and the phase-change mechanism or releases the link in accordance with temperature of the phase-change mechanism.

Abstract: A variable valve timing control apparatus of an internal combustion engine includes a drive rotary member, a driven rotary member, and a phase-change mechanism disposed between the drive and driven rotary members. The phase-change mechanism changes a relative phase between the drive and driven rotary members by an operating force, and returns the relative phase to an engine start-up phase suitable for the engine start-up at the engine starting. The phase-change mechanism has a phase-change characteristic that a phase-change rate reduces near the engine start-up phase when the relative phase is returned to the engine start-up phase.

Abstract: A display device (1) of the present invention displays an image by using an organic layer (9) which emits light having such a wavelength that affects a biorhythm, and the display device (1) controls a luminous intensity of the organic layer (9).

Abstract: A valve timing system for an internal combustion engine includes a phase alteration mechanism interposed between a driving rotator and a driven rotator and having a direction turning point at which the phase alteration direction is reversed when a movable portion of the mechanism travels from a beginning to a termination, and an operation control device for displacing the movable portion when undergoing an energization control, the movable portion being displaced toward the beginning when the energization control fails to be carried out. The rotation phase is set at a middle position between a maximum retard position and a maximum advance position when the movable portion is located at the beginning.

Abstract: A valve timing system for an internal combustion engine includes a phase alteration mechanism interposed between a driving rotator and a driven rotator and having a direction turning point at which the phase alteration direction is reversed when a movable portion of the mechanism travels from a beginning to a termination, and an operation control device for displacing the movable portion when undergoing an energization control, the movable portion being displaced toward the beginning when the energization control fails to be carried out. The rotation phase is set at a middle position between a maximum retard position and a maximum advance position when the movable portion is located at the beginning.

Abstract: A variable valve timing control apparatus of an internal combustion engine includes a drive rotary member, a driven rotary member, and a phase-change mechanism disposed between the drive and driven rotary members. The phase-change mechanism changes a relative phase between the drive and driven rotary members by an operating force, and returns the relative phase to an engine start-up phase suitable for the engine start-up at the engine starting. The phase-change mechanism has a phase-change characteristic that a phase-change rate reduces near the engine start-up phase when the relative phase is returned to the engine start-up phase.

Abstract: In a rotational phase adjusting apparatus for adjusting a difference in rotational phase between a first element and a second element by controlling an engagement therebetween through a third element whose condition is set by a movement of a fourth element, an elastic member is arranged between the fourth element and the one of the first and second elements, and a brake generates a variable braking force to be applied to the fourth element so that a rotational positional relationship between the fourth element and the one of the first and second elements and a value of a force applicable from the fourth element to the third element are elastically variable in accordance with a value of the variable braking force.

Abstract: A light guide plate includes (i) a first light guide layer made of a material having a refractive index n1, and (ii) a scattering light guide layer having a function of scattering light. A reflection means for irradiating the scattering light guide layer with the light having propagated in the first light guide layer is provided on a surface opposite to a light guide surface of the first light guide layer, the light guide surface on which the light is incident. The scattering light guide layer includes at least (i) a second light guide layer made of a material having a refractive index n2 (n2<n1), and (ii) a scattering layer for scattering the light propagating in the second light guide layer.

Abstract: In a rotational phase adjusting apparatus for adjusting a difference in rotational phase between a first element and a second element by controlling an engagement therebetween through a third element whose condition is set by a movement of a fourth element, an elastic member is arranged between the fourth element and the one of the first and second elements, and a brake generates a variable braking force to be applied to the fourth element so that a rotational positional relationship between the fourth element and the one of the first and second elements and a value of a force applicable from the fourth element to the third element are elastically variable in accordance with a value of the variable braking force.

Abstract: A valve timing system for an internal combustion engine includes a phase alteration mechanism interposed between a driving rotator and a driven rotator and having a direction turning point at which the phase alteration direction is reversed when a movable portion of the mechanism travels from a beginning to a termination, and an operation control device for displacing the movable portion when undergoing an energization control, the movable portion being displaced toward the beginning when the energization control fails to be carried out. The rotation phase is set at a middle position between a maximum retard position and a maximum advance position when the movable portion is located at the beginning.

Abstract: A light emitting device provided with a plurality of types of light sources having different light emitting colors and with a light emission control means for allowing light to emit, during a specified period of monitoring a light emitting intensity, from at least one light source out of the plurality of types of light sources at a light emitting intensity different from that available outside the specified period. Accordingly, when a plurality of types of light sources are used, the light emitting intensities of a plurality of types of light sources can be monitored with light sensors of types fewer than the types of light sources to control while points and a brightness characteristics.

Abstract: The present invention is directed to provide a thin and light optical device for observing visual information with a large angle of visual field and a head-mount display (HMD) using said optical device. An optical device according to the present invention comprises a refracting means consisting of a refracting element with half-mirror coating and a circularly polarized light selecting semitransparent mirror, which are disposed in the described order from the incident side. The circularly polarized light selecting semitransparent mirror consists of a quarter-wave plate, a half-mirror and a polarizer or cholesteric liquid crystal, which are disposed in the described order from the incident side. A thin and high-magnification optical system is obtained by using the circularly polarized light selecting semitransparent mirror that first reflects incident light in a clockwise circularly polarized fashion and allows the counterclockwise circularly polarized light having made 1.

Abstract: A throwing good for use in sky diving, including a thin-gage, synthetic resin-made back body, a roughly circular opening window, a needle, a front body, and ballast water. The back body has a bottom and a cylindrical shape. The bottom has a small hole which can be opened and closed at will by means of a plug. The opening window is provided on the wall close to the front opening of the back body. The needle is directed toward the opening window protruded from the inner wall confronting the opening window. The front body has the same diameter as that of the back body of which back opening has a tip shaped into a hemisphere. The back opening of the front body is joined to the front opening of the back body and the joining portion is integrated by covering it with a rubber band of broad width capable of covering even the opening window. The ballast water fills the front body.

Abstract: The present invention provides a thin and light optical device for observing visual information with a large angle of visual field and a head-mount display (HMD) using the optical device. The optical device includes a refractor consisting of a refracting element with half-mirror coating and a circularly polarized light selecting semitransparent mirror, which are disposed in order from the incident side. The circularly polarized light selecting semitransparent mirror consists of a quarter-wave plate, a half-mirror and a polarizer or cholesteric liquid crystal, which are disposed in order from the incident side. A thin and high-magnification optical system is obtained by using the circularly polarized light selecting semitransparent mirror that first reflects incident light in a clockwise circularly polarized fashion and allows the counterclockwise circularly polarized light having made 1.5 round trips to pass therethrough without being reflected.

Abstract: This invention is directed to provide a head-mounted display device (HMD) which is capable of providing a high-quality and impressive image with an improved S/N ratio through a super-wide-field-angle short-focus lens for obtaining wide-field-angle visual information.

Abstract: A small and light liquid-crystal projector, a projector making a combination with a head-mounted display and a small-and-light projector device for projecting an image or three-dimensional image from the HMD onto a common screen: the HMD has, in its casing, an optical device for enlarging an image of a liquid-crystal panel illuminated by a back light, which device comprising a reflection type refracting element with a half-mirror coat and a cholesteric liquid crystal element acting as circularly-polarized-light selecting semitransparent mirror; a base unit with which the HMD is connected to form a projector device has, in its housing, an optical correcting portion, a projector back-light, a light-source changing portion and a mechanism for inserting the optical correcting portion for correcting the curvature of a projectable image; when assembling the HMD with the base unit, the light-source changing portion acts so as to illuminate the liquid crystal panel with intensive back-light though a parabolic mirror