Abstract:
Provided are an illumination optical system having superior color rendering properties while ensuring sufficient illuminance, an image display apparatus comprising the illumination optical system and a spatial modulation device illuminated by the illumination optical system, and a method of illuminating the spatial modulation device. A first light source (11), a second light source (21) having a different emission spectrum from an emission spectrum of the first light source (11), and a replacement optical system replacing light in a specific waveband in a luminous flux (L1) from the first light source (11) with a luminous flux (L2) from the second light source (21) are comprised, and the light in the specific waveband with weak light intensity in the luminous flux (L1) from the first light source (11) is replaced with the luminous flux (L2) with sufficient intensity from the second light source (21). Thereby, a white balance can be kept without reducing the illuminance more than necessary, and superior color rendering properties can be exhibited.
Abstract:
A liquid crystal display apparatus wherein the visual angle of the panel relative to a viewer is detected to control a voltage impressed on the liquid crystal electrodes, so that the quality of the image displayed by the panel is not degraded even if the screen visual angle is changed.
Abstract:
A liquid crystal display panel (7) for mounting on a reclinable seat back (6), wherein the visual angle of the panel (7) relative to a viewer is detected (VR3) to control a voltage impressed on the liquid crystal electrodes to maintain the quality of the image even if the viewing angle of the panel (7) is changed.
Abstract:
A multi-beam projector is disclosed which includes a first cathode ray tube having first and second cathodes, control grids and a fluorescent screen, a circuit for applying a first video signal to the first cathode such that the first cathode emanates a first electron beam in response to the first video signal, a circuit for applying a second video signal to the second cathode such that the second cathode emanates a second electron beam in response to the second video signal, a second cathode ray tube having first and second cathodes, control grids and a fluorescent screen, a circuit for applying the first video signal to the first cathode of the second cathode ray tube such that the first cathode of the second cathode ray tube emanates a first electron beam in response to the first video signal, a circuit for applying the second video signal to the second cathode of the second cathode ray tube such that the second cathode of the second cathode ray tube emanates a second electron beam in response to the second video signal and the interval between the first and second electron beams of the second cathode ray tube is wider than the interval between the first and second electron beams of the first cathode ray tube, a circuit for delaying the second video signal applied to the second cathode of the second cathode ray tube and a deflection device for horizontally and vertically deflecting the first and second electron beams of the first and second cathode ray tubes simultaneously.
Abstract:
An illuminating optical system excellent in color rendering with a sufficient illuminance ensured, an image display unit provided with such an illuminating optical system and a space modulation element illuminated by this, and a method of illuminating such a space modulation element. The system comprises a first light source (11), a second light source (21) having an emission spectrum different from that of the first light source (11), and a replacing optical system for replacing a light beam in a specific wavelength band out of a light flux (L1) from the first light source (11) with a light flux (L2) from the second light source (21), a weak-light-intensity light beam in a specific wavelength band in a light flux (L1) from the first light source (11) being replace by a light flux (L2) from the second light source (21) having a sufficient intensity. Accordingly, white balance can be ensured without lowering in illuminance more than necessary to deliver an excellent color rendering performance.
Abstract:
An information transmission system for transmitting signals from a transmitting side through a single transmission line to a plurality of terminal units. When the terminal units are interrupted by a command signal from the transmitting side, transmission of ordinary information signals to the terminal units is inhibited. When the terminal units are released from the interrupt mode, transmission of ordinary information signals automatically resumes, so that the ordinary information signals are reproduced from the point in time point at which they were interrupted. Normal operation of the terminal units is partially or totally inhibited during the interrupt mode. The system may be embodied in a passenger vehicle, in which a terminal unit is provided at each of a plurality of passenger seats.
Abstract:
A multi-beam projector incorporates a cathode ray tube for each of the primary colors red, green and blue, with each cathode ray tube having two electron beams, with all of said electron beams being horizontally and vertically deflected in synchronism with each other. Primary color video signals are supplied to one cathode of each cathode ray tube for generating a first beam, and a delayed primary color video signal is supplied to the second cathode of each cathode ray tube for generating a second beam spaced from the first beam by a predetermined interval. The interval spacing between the beam of the cathode ray tube for the blue primary color is wider than the interval between the electron beams for the other cathode ray tubes.
Abstract:
A message delivery system for transmitting signals from a transmitting side through a single transmission line (21) to a plurality of terminal units (30). When the terminal units (30) are interrupted by a command signal from the transmitting side, transmission of ordinary information signals, such as video signals from video tape recorders (1b-1d), to the terminal units (30) is inhibited. When the terminal units (30) are released from the interrupt mode, transmission of ordinary information signals automatically resumes, so that the ordinary information signals are reproduced from the point in time at which they were interrupted. Normal operation of the terminal units (30) is partially or totally inhibited during the interrupt mode, thereby allowing an announcement or the like to be made. The system may be embodied in a passenger vehicle, in which a terminal unit (30) is provided at each of a plurality of passenger seats.
Abstract:
A multi-beam projector incorporates a cathode ray tube for each of the primary colors red, green and blue, with each cathode ray tube having two electron beams, with all of said electron beams being horizontally and vertically deflected in synchronism with each other. Primary color video signals are supplied to one cathode of each cathode ray tube for generating a first beam, and a delayed primary color video signal is supplied to the second cathode of each cathode ray tube for generating a second beam spaced from the first beam by a predetermined interval. The interval spacing between the beam of the cathode ray tube for the blue primary color is wider than the interval between the electron beams for the other cathode ray tubes.