[in Japanese]

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This paper describes the development of a new digital VTR system for home-use which provides both wide-band precision DTF (Dynamic Track Following) over a band of several hundred hertz, and noiseless high-speed search at speeds several tens of times faster than normal without picture quality deterioration.
This new system also ensures good control of recording and playback with a precision wide-band tension control, which maintains optimum contact between the head and the tape.
To provide these abilities, the system uses a pair of movable tape guide pins inserted in the tape path at both the entrance and the exit of a rotary drum with moving magnetic heads.

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Although originally developed for aircraft use, head-up displays (HUDs) have recently been applied to automobiles. As these devices are adapted to other applications such as navigation, route guidance, and obstacle avoidance systems, they will require more complex display patterns and wider display areas.
It is critical that these HUD images do not affect a driver's ability to recognize objects in the outside environment under any condition because recognizing these objects is always a primary driver task.
In driving a vehicle equipped with a HUD, the most difficult condition for recognizing the outside environment seems to be when the displayed image is superimposed on objects in the road and more than 50 percent of oncoming vehicles have their headlights turned on.
In this paper, we investigate a driver's ability to recognize the outside environment, under these conditions in both the central and the peripheral field of vision, using tachistoscopic exposure of test targets.
It is determined that the level of displayed image luminance affects a driver's ability to recognize outside objects. However, objects recognition in the forward view is found to be much improved, not only in the central field of vision, but also in the peripheral field of vision if the velocity of the vehicle is increased slgihtly.

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A 40-inch liquid-crystal (LCD) rear-projection stereoscopic color TV display that requires no special glasses is described. The resulting 3-D TV image was of high resolution, exceptionally bright, and vividly three-dimensional. The key technologies that support this 3-D TV display are a three-dimensional image-projection method, a high-resolution (345, 600×3 pixels) LCD video projector, and a new type of lenticular screen. Images from left- and right-hand TV cameras are multiplexed, pixel by pixel, to form a vertical stripe image and projected by a single LCD color video projector from behind the lenticular screen. Using this image-projection method, optical alignment between the vertical stripe image and the lenticular screen is both accurate and easily attained. A specially designed lenticular screen with a “hollow structure” reduces total screen weight and thickness, and increases light transmittance. This 3-D TV display has widespread application in a broad range of fields, inculding home 3-D TV, amusement, medicine, education, and various industrial sectors.

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