Abstract: An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

Abstract: The present invention discloses an image-projecting apparatus which employs an AF (auto-focusing) system suitable for use conditions of the image-projecting apparatus and is capable of securing satisfactory AF accuracy under bright conditions. The image-projecting apparatus comprises a projection optical system which projects light from an image-forming element onto a projection surface, and a detecting system which performs a detecting operation of a distance to the projection surface or a detecting operation of a focusing state of the projection optical system with respect to the projection surface. The detecting system determines a condition of the detecting operation on the basis of the light-receiving intensity level of the light-receiving element which receives reflected light from the projection surface of light projected and performs the detecting operation in accordance with the condition.

Abstract: An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

Abstract: An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

Abstract: The present invention discloses an image-projecting apparatus which employs an AF (auto-focusing) system suitable for use conditions of the image-projecting apparatus and is capable of securing satisfactory AF accuracy under bright conditions. The image-projecting apparatus comprises a projection optical system which projects light from an image-forming element onto a projection surface, and a detecting system which performs a detecting operation of a distance to the projection surface or a detecting operation of a focusing state of the projection optical system with respect to the projection surface. The detecting system determines a condition of the detecting operation on the basis of the light-receiving intensity level of the light-receiving element which receives reflected light from the projection surface of light projected and performs the detecting operation in accordance with the condition.

Abstract: A projection type image display apparatus capable of achieving accurate focusing of a projection optical system using an output from a photoreception sensor, is disclosed. The projection type image display apparatus includes a projection optical system and performs focusing control of the projection optical system based on an output signal from an photoreception sensor. The photoreception sensor receives light from the projection surface. The optical axis of the projection optical system is shifted with respect to a reference axis. The reference axis leads from the center of an original image formed on an image forming element to the center of the projected image. The photoreception sensor receives light from a detection area which is proximate to and includes the position of the optical axis of the projection optical system on the projection surface.

Abstract: An image projection apparatus is disclosed with which problems, caused by performing focusing control in a state in which the light amount of a light source is insufficient, can be avoided. The image projection apparatus comprises a controller, performing focusing control of a projection optical system, and a brightness detector which detects at least one of a brightness of the light source and a brightness of a reflected light on a projection surface. After turning the light source on, the controller restricts the focusing control until the brightness detected by the brightness detector reaches a predetermined value.

Abstract: A projection type image display apparatus capable of achieving accurate focusing of a projection optical system using an output from a photoreception sensor, is disclosed. The projection type image display apparatus includes a projection optical system and performs focusing control of the projection optical system based on an output signal from an photoreception sensor. The photoreception sensor receives light from the projection surface. The optical axis of the projection optical system is shifted with respect to a reference axis. The reference axis leads from the center of an original image formed on an image forming element to the center of the projected image. The photoreception sensor receives light from a detection area which is proximate to and includes the position of the optical axis of the projection optical system on the projection surface.

Abstract: A PC card camera has a structure in which a universal joint to which a video camera is attached is mounted on a PC card body. The video camera comprises an optical lens unit and a solid-state area sensor of the photoelectric transducer type. The universal joint holds the video camera in such a manner that the angular position thereof can be adjusted freely with respect to the PC card. The PC card body is provided with a guide for guiding the card into a slot provided in a personal computer, a connector for connecting the PC card to the personal computer, and a cut-out which prevents the PC card from being inserted incorrectly. With the PC card connected to the personal computer, the angular position of the video camera can be adjusted via the universal joint.

Abstract: A PC card camera has a structure in which a universal joint to which a video camera is attached is mounted on a PC card body. The video camera comprises an optical lens unit and a solid-state area sensor of the photoelectric transducer type. The universal joint holds the video camera in such a manner that the angular position thereof can be adjusted freely with respect to the PC card. The PC card body is provided with a guide for guiding the card into a slot provided in a personal computer, a connector for connecting the PC card to the personal computer, and a cut-out which prevents the PC card from being inserted incorrectly. With the PC card connected to the personal computer, the angular position of the video camera can be adjusted via the universal joint.

Abstract: The object of the present invention is to miniaturize an optical unit and an image display device. The optical unit of the present invention keeps an optical system so as to form an optical path inside a housing. The optical unit has at least one reflecting optical element, and the at least one reflecting optical element is formed in one body with the housing.

Abstract: The object of the present invention is to miniaturize an optical unit and an image display device. The optical unit of the present invention keeps an optical system so as to form an optical path inside a housing. The optical unit has at least one reflecting optical element, and the at least one reflecting optical element is formed in one body with the housing.

Abstract: Disclosed is an image projection apparatus including a display device which has a plurality of pixel apertures and displays image information, an illumination optical unit for illuminating the display device, a projection optical unit for projecting the image information displayed on the display device on a predetermined surface, and a blower for blowing air to the atmosphere in the display device. Dust affecting a projected image is prevented from attaching near the display device.

Abstract: A PC card camera has a structure in which a universal joint to which a video camera is attached is mounted on a PC card body. The video camera comprises an optical lens unit and a solid-state area sensor of the photoelectric transducer type. The universal joint holds the video camera in such a manner that the angular position thereof can be adjusted freely with respect to the PC card. The PC card body is provided with a guide for guiding the card into a slot provided in a personal computer, a connector for connecting the PC card to the personal computer, and a cut-out which prevents the PC card from being inserted incorrectly. With the PC card connected to the personal computer, the angular position of the video camera can be adjusted via the universal joint.

Abstract: A PC card camera has a structure in which a universal joint to which a video camera is attached is mounted on a PC card body. The video camera comprises an optical lens unit and a solid-state area sensor of the photoelectric transducer type. The universal joint holds the video camera in such a manner that the angular position thereof can be adjusted freely with respect to the PC card. The PC card body is provided with a guide for guiding the card into a slot provided in a personal computer, a connector for connecting the PC card to the personal computer, and a cut-out which prevents the PC card from being inserted incorrectly. With the PC card connected to the personal computer, the angular position of the video camera can be adjusted via the universal joint.

Abstract: A driving device includes a movable object, a driving part for moving the object, a manual operation member, a pulse generator for generating a plurality of pulses successively according to an operation of the operation member with pulse intervals varying depending on its operation speed, a data forming part for forming a plurality of data on the basis of the plurality of pulses successively according to the pulse intervals, a storage part for storing successively the plurality of data and a reading part for reading out the stored plurality of data successively and determining a drive parameter for each of the read out data corresponding to the speed for moving the object by the driving part by using the data value. The timing for reading out subsequent data is set after completion of the movement of the object on the basis of a prior data value.

Abstract: A device includes a zoom lens having a focusing lens the position of which varies according to a zooming operation, a first moving part arranged to mechanically move the focusing lens according to the zooming operation, and a second moving part arranged to move the focusing lens in such a way as to electrically correct any shift of focus that results from the movement of the focusing lens caused by the first moving part.

Abstract: A driving device utilizes first and second driving units which drive an object when the operating speed of a manual operation member detected by a pulse signal are less than and not less than, respectively, a predetermined speed. The first driving unit drives the object based on the pulse signal and the second driving unit drives the object to a predetermined position. The second driving unit, when shifted to driving from the first driving unit, retains driving even if the operating speed falls below the predetermined speed.