Abstract: A display apparatus includes a plurality of adjustment units for performing diopter adjustment, base length adjustment, and vergence angle adjustment in accordance with the characteristics of users, and a storage unit for storing pieces of operation condition information of the users of the display apparatus. With this arrangement, when the display apparatus is to be used, the respective adjustment units can be adjusted in accordance with the operation condition information stored in the storage unit, thereby reducing troubles with adjusting operations and simplifying the adjusting operations of the respective adjustment units. In addition, the operability of the apparatus in consideration of a plurality of users is greatly improved.

Abstract: A signal processing apparatus is provided with processing units capable of reducing the number of signal processing means and the number of adjustments of a delay time between reversal and non-reversal of video-signal polarity in each of two signal paths in an arrangement in which two liquid-crystal displays (LCDs) are provided in a head-mounted display worn by an observer and each of the two displays is used to display video information viewed by the observer. The signal processing apparatus includes first and second signal sources (1 and 2 each of which generates a video signal, reversing unit 7 for reversing the polarity of one of the two video signals, first selector selectively supplying one of the video signals to the reversing unit, first and second display units (3 and 4 for converting the video signals to respective ones of optical signals, and second selector for selectively supplying a video signal whose polarity is or is not reversed by the reversing unit to the first and second display units.

Abstract: A signal processing apparatus is provided with processing units capable of reducing the number of signal processing means and the number of adjustments of a delay time between reversal and non-reversal of video-signal polarity in each of two signal paths in an arrangement in which two liquid-crystal displays (LCDs) are provided in a head-mounted display worn by an observer and each of the two displays is used to display video information viewed by the observer. The signal processing apparatus includes first and second signal sources (1 and 2) each of which generates a video signal, reversing unit 7 for reversing the polarity of one of the two video signals, first selector selectively supplying one of the video signals to the reversing unit, first and second display units (3 and 4) for converting the video signals to respective ones of optical signals, and second selector for selectively supplying a video signal whose polarity is or is not reversed by the reversing unit to the first and second display units.

Abstract: An image display apparatus for displaying an image represented by an image signal corresponding to an object and a reproduced image represented by an image signal reproduced from a storage medium includes a display device provided with a first display mode that permits binary image displays at a low-brightness level and at a high-brightness level and a second display mode that permits multi-level image displays at the low-brightness level, the high-brightness level and at an intermediate level. The brightness level in the display device is set to be lower when the display device displays in the first display mode than when the display device displays in the second display mode. Thus, a low power consumption, easy-to-use and long battery life image display apparatus is provided.

Abstract: A signal processing apparatus is provided with processing units capable of reducing the number of signal processors and the number of adjustments of a delay time between reversal and non-reversal of video-signal polarity in each of two signal paths in an arrangement in which two liquid-crystal displays (LCDS) are provided in a head-mounted display worn by an observer and each of the two displays is used to display video information viewed by the observer. The signal processing apparatus includes first and second signal sources (1 and 2) each of which generates a video signal, reversing unit 7 for reversing the polarity of one of the two video signals, first selector selectively supplying one of the video signals to the reversing unit, first and second display units (3 and 4) for converting the video signals to respective ones of optical signals, and second selector for selectively supplying a video signal whose polarity is or is not reversed by the reversing unit to the first and second display units.

Abstract: An electronic video camera which picks up an object image and records on a recording medium an image signal corresponding to the object image picked up is arranged to record an information signal indicative of an image pickup sensitivity along with the image signal when the latter is recorded, to reproduce the image signal and the information signal recorded on the recording medium and to control the characteristic of a signal processing action on the reproduced image signal according to the reproduced information signal. The arrangement enables the electronic video camera to effectively prevents image quality deterioration, so that the image signal can be reproduced with a high image quality.

Abstract: The present invention concerns a display apparatus, which comprises a display device for displaying image information for the both eyes of an observer, a use-state detecting device for detecting a use state and a non-use state about whether or not the observer is observing the display device, a power supply device for supplying power to each element in the display apparatus, and a device for controlling the power supply device, based on a signal from the use-state detecting device.