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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Yamada; Akira
Address:
Yokohama, JP
No. of patents:
46
Patents:












Patent Number Title Of Patent Date Issued
8165051 Radio terminal, radio communication system, and radio communication method April 24, 2012
A radio terminal includes a radio interface configured to allow radio communication with a radio base station, and a controller configured to control switching between a wake-up state in which the radio interface is turned on and a sleep state in which the radio interface is turned off.
8149864 Wireless communication terminal and wireless communication method April 3, 2012
A communication terminal used in a mobile communication system complying with a carrier sense multiple access scheme is disclosed. The communication terminal includes: a receiving unit configured to receive a wireless packet transmitted by another communication terminal or a base sta
8144677 Wireless communication device and wireless communication method March 27, 2012
An object of the present invention is to realize a distributed autonomous transmission scheduling by using a terminal without the need to observe packets in relation to communication of other wireless terminals in a cell, such as VoIP, in which a plurality of wireless terminals that
8130784 Wireless communication terminal and wireless communication method March 6, 2012
A communication terminal used in a mobile communication system complying with a carrier sense multiple access scheme is disclosed. The communication terminal includes: a receiving unit configured to receive a wireless packet transmitted by another communication terminal or a base sta
8054852 Wireless communication terminal and wireless communication method November 8, 2011
A communication terminal used in a mobile communication system complying with a carrier sense multiple access scheme is disclosed. The communication terminal includes: a receiving unit configured to receive a wireless packet transmitted by another communication terminal or a base sta
8009599 Wireless communication device and wireless communication method August 30, 2011
A wireless communication device that transmits packets, on the basis of a packet transmission scheme for allocating wireless bands with virtual carrier sensing, has: monitoring module for monitoring packets communicated between other wireless communication devices and base stations f
7940692 Wireless communication terminal and wireless communication method May 10, 2011
A wireless communication terminal comprises: a packet receiving unit for receiving a packet from a wireless base station; module for obtaining a transmission rate and a required transmission time from the received packet; module for calculating a time required to perform a packet tra
7843956 Wireless system, wireless communication apparatus and communication method November 30, 2010
A wireless communication system complying with a CSMA scheme includes one or more wireless communication apparatuses and a communication terminal that performs communication via the one or more wireless communication apparatuses. Each wireless communication apparatus includes: a tran
7813275 Wireless communication device, a wireless communication system and a wireless communication meth October 12, 2010
A wireless communication device, a wireless communication system and a wireless communication method for preventing buffer over flow in the wireless communication device acting as a relay node, and for improving throughput within the whole system are disclosed. The wireless communica
7756528 Area estimation system and area estimation method July 13, 2010
An area estimation system includes: a radio signal transmitting unit configured to transmit a radio signal to certain radio signal receiving terminal; a radio signal capturing unit configured to capture the radio signal transmitted from the radio signal transmitting unit, to obtain an
7738481 Wireless communication device and wireless communication method June 15, 2010
A wireless communication device that performs packet transmission in accordance with a packet transmission system that performs wireless bandwidth allocation by virtual carrier sensing has a time-point management section that manages the time-point and outputs current time-point info
7697457 Wireless communication apparatus and wireless communication method April 13, 2010
A wireless communication apparatus comprises a transmission buffer configured to store packets addressed to one or more communication nodes in the network until a transmission timing; a requesting interval determination unit configured to determine a listen interval for each of the c
7583651 Wireless communication apparatus and wireless communication system for adjusting the transmissio September 1, 2009
A wireless communication apparatus capable of constructing an ad-hoc wireless network is disclosed to include a transmitting/receiving unit configured to transmit and receive a common broadcast signal; and a transmission interval control unit configured to change transmission interva
5983029 Optical apparatus equipped with sight line detector November 9, 1999
An optical apparatus including a detecting unit for detecting sight line direction of a human eye, a correcting data forming unit, electrically connected to the detecting unit, for forming correcting data as to personal difference of a human eye, a visual mark presenting unit electri
5913080 Optical apparatus equipped with sight line detector June 15, 1999
An apparatus for using correction data to correct for personal differences, to provide sight line information. The apparatus includes an image sensor for photographing an eyeball, a pupil diameter determination device for determining a pupil diameter of the eyeball in accordance with an
5913079 Optical apparatus having a line of sight detection device June 15, 1999
An apparatus having a line of sight detection device, comprises a viewfinder for observing a target object, a line of sight detection means for detecting a position of line of sight in the viewfinder of a user, focus detection means being possible to select a first operation mode for
5797046 Visual axis controllable optical apparatus including a visual axis detecting device for detectin August 18, 1998
A visual axis controllable optical apparatus, which is used in different postures. The optical apparatus includes a light detecting device for receiving light reflected by an eye, and detecting the intensity distribution of the received light, a storage device for storing personal da
5771402 Optical apparatus equipped with sight line detector June 23, 1998
An optical apparatus for detecting rotation of an eyeball of an observer to provide sight line information, including an optical unit for imaging light flux from the eye of the observer, an image sensor for receiving light flux from the optical unit, and a control unit for designating a
5761543 Apparatus for measuring anterior eye portion June 2, 1998
There is disclosed an apparatus including an illuminating unit for illuminating an eyeball, a light-receiving unit for receiving light reflected by the eyeball to measure the state of an anterior eye portion, and a holding unit for holding the illuminating unit and the light-receivin
5752090 Optical device having a line of sight detection apparatus May 12, 1998
An optical device having a line of sight detection circuit, includes a line of sight detection circuit for detecting the line of sight of a user, a display member for displaying the position of the line of sight detected by the line of sight detection circuit, an operation unit which can
5696998 Optical apparatus equipped with sight line detector December 9, 1997
A sight line detecting device includes a controller operable in a sight line information using mode for controlling an optical apparatus for use in accordance with sight line information, and usable in a sight line information prohibiting mode for controlling the apparatus without using
5692222 Camera having focus detection device November 25, 1997
A focus adjusting apparatus which includes a focus detection device for independently detecting focus states of N different regions in a scene. The apparatus includes a selection circuit and a focus adjustment circuit. The selection circuit simultaneously selects, among the N regions, an
5634141 Visual axis detection device capable of reducing detection errors due to variations of eyes amon May 27, 1997
A visual axis detection apparatus including a correction data storage section to store the correction data to correct errors in the detected visual information; an individual variation correction data detection system to detect the individual variation data related to the visual axis
5610681 Optical eye-control apparatus March 11, 1997
An apparatus having an irradiation device for irradiating the eye of an observer; a sensor having a number of pixels with a set pitch; an image forming optical unit for imaging light reflected by the eye onto the sensor; and an electronic circuit for making a signal denoting the dire
5600399 Optical apparatus and camera for controlling a plurality of functions by using a visual axis February 4, 1997
This invention relates to an optical apparatus with a visual axis detection function. The apparatus having finder means for observing an object, and visual axis detection means for detecting a visual axis position of an observer who looks into a field of view of a finder comprises a visu
5579080 Camera including an apparatus for detecting a line of sight November 26, 1996
A camera is provided having a line-of-sight detecting device for detecting a line of sight of an observer, photometric means for detecting luminances of subareas into which a luminance detection area is partitioned, a selecting means for selecting a specific subarea from the plurality of
5579079 Optical apparatus equipped with sight line detector November 26, 1996
An apparatus for detecting information of an eye of a person includes a light illuminating unit for illuminating the eye of the person with light from a plurality of different positions, a photoelectrical changing device for detecting light reflected from the eye, and a controlling devic
5561289 Device for detecting line of sight October 1, 1996
In a device for detecting the line of sight of the observer, when the detection of the line of sight is identified as having failed, the detection is effected again with a variation in the output signal of the eyeball image or in the detection threshold value for detecting the featur
5541400 Accumulation control apparatus for photoelectric conversion element and visual axis detection ap July 30, 1996
An apparatus includes a photoelectric conversion device having a plurality of photoelectric conversion elements for converting light to photoelectric conversion signals and for transferring the photoelectric conversion signals to adjacent photoelectric conversion elements. The apparatus
5485241 Optical equipment with device for detecting direction of visual axis January 16, 1996
An optical apparatus with a visual axis detecting device for converting the light reflected from the eyeball into an electrical signal and calculating the direction of visual axis from the electrical signal.Plural pairs of illuminating light sources are provided around the view finder, a
5473403 Camera having a multi-point focus detecting device December 5, 1995
The present invention relates to a multi-point distance measuring camera. The present invention provides a camera in which target marks representative of distance measuring points are indicated in an image field in a finder to thereby indicate for which object focus detection can be
5367153 Apparatus for detecting the focus adjusting state of an objective lens by performing filter proc November 22, 1994
A focus detection apparatus includes an optical system for forming first and second optical distributions associated with object images whose relative positional relationship is changed in accordance with an imaging state of an imaging optical system subjected to focus detection, a p
5337865 Viscoelastic substance and objective lens driving apparatus with the same August 16, 1994
A viscoelastic substance which is useful in an objective lens driving apparatus has magnetic particles dispersed therein for generating a force for restoring deformation of the viscoelastic substance when an external force acts upon the viscoelastic substance in the presence of an extern
5296888 Sight axis detection apparatus March 22, 1994
An apparatus comprising a sight axis detection means for detecting a sight axis direction of a photographer who looks into a finder field, a focus detection means for detecting focus adjustment states in a plurality of areas in the finder field, and a photometry means for measuring lumin
5280312 Visual axis detection apparatus January 18, 1994
A visual axis detection apparatus in which an eye of an observer is illuminated by a light source, and the corneal reflection image of the eye and the reflected image of the iris are detected by a light sensor. By the utilization of the position information of each reflected image from t
5245371 Camera provided with a visual axis direction detecting portion September 14, 1993
A camera is provided with observation means for observing a scene therethrough, a visual axis detecting device for detecting the visual axis direction of the eye of an operator looking into the observation means, an information receiving device for receiving the information of an objecti
5237557 Optical head having improved reflecting assembly August 17, 1993
In an optical head, a light beam emitted from a semiconductor laser is guided to a carrier through a collimator lens and a beam splitter. An objective lens movable along an optical axis and a mirror having a oval reflecting surface are mounted on a carrier which is movable along a ra
5214466 Camera having visual axis detecting apparatus May 25, 1993
A camera having a line of sight detecting apparatus to detect a line of sight of an eyeball of an observer comprises: a lens device having a movable lens; a detector to detect a moving state of the movable lens in the lens device; and a controller for making the line of sight detecting
5206762 Viscoelastic substance and objective lens driving apparatus with the same April 27, 1993
An objective lens driving apparatus includes an objective lens held by a movable member. The movable member is supported on a base by a support mechanism to be movable in a predetermined direction. Magnetic field forming unit is fixed to the base so as to apply a magnetic field to the
4948230 Objective lens driving apparatus August 14, 1990
An objective lens driving apparatus is provided which can restrain hysteresis phenomena in the relationship between semi-static displacements and forces in a focusing direction of the objective lens. The apparatus can also maintain the balance of force even when the objective lens is
4853734 Disposition of a flexible printed circuit board in a camera August 1, 1989
A camera has a flexible printed circuit board provided with a storage device, such as an EEPROM, which is capable of electrically effecting the writing and erasing of information. The flexible printed circuit board is disposed along a front surface portion and along another surface porti
4788569 Display device for use in a photographic camera November 29, 1988
A display device for use in a photographic camera has a light receiving type display arrangement including a negative type, electro-optically photosensitive panel having a plurality of first segments and a second segment. The first segments comprise groups of display segments each di
4679903 Objective lens driving device July 14, 1987
In an objective lens driving device, a movable member shiftable along and rotatable around a vertical shaft is provided for supporting the objective lens to be movable therewith vertically and horizontally. An electromagnetic driving means is provided for driving the movable member a
4568143 Optical fiber crossover switching apparatus February 4, 1986
An optical switching apparatus comprises a stationary block and a movable block. The stationary block abuts on one face of the movable block. The stationary block holds a first and a second input optical fiber and a first and a second output optical fiber. The movable block holds four
4553227 Optical pickup November 12, 1985
An optical pickup assembly has a lens assembly movably supported in a magnetic gap of a yoke by flexible supporting members. Magnetic interaction between elements of the lens assembly and the yoke help center the lens assembly in the magnetic gap. Electromagnets move the lens assembl
4139791 Damping structure for elastic surface wave device February 13, 1979
An elastic surface wave device comprises a piezoelectric substrate; input and output interdigital transducers provided on one surface of the piezoelectric substrate and mutually spaced apart from each other to define a surface wave propagation path therebetween; and a surface wave ab










 
 
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