Abstract: A color separating-combining optical system is configured to separate illumination light into a plurality of color spectrums, guiding these color spectrums to respective image display elements, and combining the color spectrums modulated by the image display elements. The system includes a first polarization separating optical system that reflects the first color spectrum from the separating optical system to a first image display element and transmits the first color spectrum from the first image display element to the combining optical system. Similarly, a second polarization separating optical system is provided that reflects and transmits the second color spectrum. The degree of linear polarization of a reflected color can be maintained higher than that of another, and/or an antireflection element can be included in the path of reflected light.

Abstract: There is disclosed a display apparatus including a polarizing beam splitter for splitting light from a light source, a reflective liquid crystal display element illuminated by light of a predetermined polarizing direction through the polarizing beam splitter, and a double refractive phase compensation element arranged between the polarizing beam splitter and the reflective liquid crystal display element.

Abstract: A color combining optical system which can suppress occurrence of a thermal problem and increase in size is disclosed. The color combining optical system comprises a first optical element which has a first optical film reflecting light having a first polarizing direction and transmitting light in a second polarizing direction and combines the first and second color lights by the first optical film. In addition, the optical system comprises a polarizing plate which analyzes a third color light. Furthermore, the optical system comprises a second optical element which combines, by a second optical film, the third color light transmitted through the polarizing plate with the first and second color lights combined by the first optical element.

Abstract: A mobile-type electronic apparatus is arranged to input an image picked up by a camera to a display circuit through an image pickup circuit and a communication circuit and to display the image on an LCD panel in a state of being enlarged by an enlargement display optical system. In the mobile-type electronic apparatus, a control circuit is arranged to switch the power supply for the display circuit from one state over to another, according to an operation performed on a switch portion, in such a way as to supply electric power only when the use of the LCD panel and a back light is necessary.

Abstract: A color combining optical system which can suppress occurrence of a thermal problem and increase in size is disclosed. The color combining optical system comprises a first optical element which has a first optical film reflecting light having a first polarizing direction and transmitting light in a second polarizing direction and combines the first and second color lights by the first optical film. In addition, the optical system comprises a polarizing plate which analyzes a third color light. Furthermore, the optical system comprises a second optical element which combines, by a second optical film, the third color light transmitted through the polarizing plate with the first and second color lights combined by the first optical element.

Abstract: A head-mounted display apparatus includes a front frame on which a display part is mounted and right and left side frames which are connected to the two end parts of the front frame by hinge parts in a foldable manner. An earphone-and-cable fixing part and an earphone fixing part are provided respectively on the lower sides of the right and left side frames. The earphone-and-cable fixing part has its end surface formed in a “3” like shape to allow a cable and the stem part of an earphone to be lightly inserted there. The earphone fixing part has its end surface formed in a “C” like shape to allow an earphone to be lightly inserted there. Elastic members provided at the right and left side frames are arranged to have their fore ends not touching right and left observation windows provided in the body of the display part in a state obtained with the side frames folded on the inner side of the front frame.

Abstract: There is disclosed a display apparatus including a polarizing beam splitter for splitting light from a light source, a reflective liquid crystal display element illuminated by light of a predetermined polarizing direction through the polarizing beam splitter, and a double refractive phase compensation element arranged between the polarizing beam splitter and the reflective liquid crystal display element.

Abstract: There is provided a color separating-combining optical system having:

Abstract: An image display apparatus includes a display element for displaying a video image, a backlight source for illuminating the display element, and a sculptured surface prism for guiding light from the display element. The sculptured surface prism enlarges the video image on the display element and presents the video image to an observer. The display element and the sculptured surface prism are supported by a holding member. An electrical circuit board is provided to drive the display element. The electrical circuit board and the display element are electrically connected. The electrical circuit board is arranged behind the display element, behind the sculptured surface prism when viewed from the observer, or on one side of the sculptured surface prism when viewed by the observer.

Abstract: An image display apparatus includes a light source for supplying illumination light, a reflective display element for reflecting and modulating the illumination light into image light, a first optical system for guiding the illumination light to the reflective display element, and a second optical system for guiding the image light to an observer. Particularly, the first optical system has an optical element including a first surface on which the illumination light is incident, a second surface for totally reflecting the light incident on the first surface, and a third surface from which the light totally reflected by the second surface emerges toward the reflective display element. The first optical system is arranged so that the image light is again incident through the third surface on the optical element and emerges from the second surface toward the second optical system.

Abstract: A user changes the shapes of the side frames from the shapes at the positions indicated by dashed lines at which no external force is applied to those at the positions indicated by dashed lines, and mounts the side frames on the head. As a result, the side frames and rear mount pads perfectly fit on the head, as indicated by solid lines. The user therefore can see video on a main body of a display unit in a natural state without any strain.

Abstract: An image display apparatus includes a display element for displaying a video image, a backlight source for illuminating the display element, a sculptured surface prism for guiding light from the display element. The sculptured surface prism enlarges the video image on the display element and presents the video image to an observer. The display element and the sculptured surface prism are supported by a holding member. An electrical circuit board is provided to drive the display element. The electrical circuit board and the display element are electrically connected. The electrical circuit board is arranged behind the display element, behind the sculptured surface prism when viewed from the observer, or on one side of the sculptured surface prism when viewed from the observer.

Abstract: An image display apparatus includes a light source for supplying illumination light, a reflective display element for reflecting and modulating the illumination light into image light, a first optical system for guiding the illumination light to the reflective display element, and a second optical system for guiding the image light to an observer. Particularly, the first optical system has an optical element including a first surface on which the illumination light is incident, a second surface for totally reflecting the light incident on the first surface, and a third surface from which the light totally reflected by the second surface emerges toward the reflective display element, and the first optical system is arranged so that the image light is again incident through the third surface on the optical element and emerges from the second surface toward the second optical system.

Abstract: A sensor includes a plurality of weight portions which swivel, support parts each of which supports at one end a corresponding one of the plurality of weight portions in the same direction, and a driving part which supplies driving power to the support parts to swivel the plurality of weight portions. The driving part swivels at least one weight portion of the plurality of weight portions in a first direction and a remaining weight portion in a second direction opposite to the first direction so that the angular velocity about an axis parallel to a predetermined swivel locus of the at least one weight portion, excluding an acceleration component in the direction of the axis, can be detected from the difference between a deviation of a swivel locus of the at least one weight portion from the predetermined swivel locus and a deviation of a swivel locus of the remaining weight portion from a predetermined swivel locus thereof.

Abstract: A mobile-type electronic apparatus is arranged to input an image picked up by a camera to a display circuit through an image pickup circuit and a communication circuit and to display the image on an LCD panel in a state of being enlarged by an enlargement display optical system. In the mobile-type electronic apparatus, a control circuit is arranged to switch the power supply for the display circuit from one state over to another, according to an operation performed on a switch portion, in such a way as to supply electric power only when the use of the LCD panel and a back light is necessary.

Abstract: A vibration device has a vibration member for exciting vibration by supplying power to the vibration device. A signal supply member for sandwiching the vibration member such that the vibration member can be elastically deformed supplies a driving electric signal to the vibration member.

Abstract: A video camera of the kind performing a power varying action on a zoom lens while keeping its variator lens and its focus lens in a predetermined relation comprises a memory for storing information on driving speeds at which the variator lens is to be driven at respective moving positions thereof, a position detecting circuit for detecting the positions of the variator lens and the focus lens, and a control circuit for driving the variator lens and the focus lens, on the basis of information on a driving speed of the variator lens read out from the memory according to the result of detection made by the position detecting circuit, in such a manner that a driving speed of the focus lens remains nearly constant in the neighborhood of a telephoto end position of the zoom lens. The video camera is thus arranged to be capable of uniformalizing the driving speed of the focus lens even in the neighborhood of the telephoto end position where the follow speed of the focus lens tends to suddenly increase.

Abstract: A driving apparatus includes a permanent magnet magnetized so as to have a plurality of poles, a coil for making a magnetic field by the application of a voltage thereto, and creating a force between itself and the permanent magnet, the force created between the coil and the permanent magnet driving an object to be driven, a position detecting means for detecting the position of the object to be driven by using a magnetic flux of the permanent magnet, and a feedback circuit for feeding back information corresponding to the voltage applied to the coil to the position information of the object to be driven obtained by the position detector. The driving apparatus may be used in an optical apparatus.

Abstract: A lens driving device includes a stator, a rotor magnetized to have a plurality of poles, an arm fixed to the rotor in such a manner as to be rotatable together with the rotor, a moving member for rectilinearly moving a lens in response to a rotation of the arm and a coil for causing the stator to generate a magnetic flux to rotate the rotor.

Abstract: An image-blur prevention apparatus includes a vibration detection unit for detecting a vibration state, an image-blur correction unit for correcting an image blur, an open-loop controllable driving unit for driving the image-blur correction unit, and a control unit for open-loop controlling the driving unit in accordance with an output from the vibration detection unit.