Keyboard Or Other Manual Switch Controlled Patents (Class 250/227.22)
  • Patent number: 10267987
    Abstract: Light emitters are made of one or more cladded flat optical fibers having opposite flat sides and disruptions along at least a portion of the length of the fibers to cause light entering at least one end to be emitted from at least one side. The ends of the flat optical fibers may have substantially the same thickness as a light source and a width substantially equal to or substantially greater than the width of the light source for ease of optically coupling one or more such light sources to the flat optical fiber ends.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: April 23, 2019
    Assignee: Lumitex, Inc.
    Inventors: David J. Page, Brian M. Spahnie
  • Patent number: 10234828
    Abstract: One embodiment of the present disclosure is directed to a wearable electronic device. The wearable electronic device includes an enclosure having a sidewall with a button aperture defined therethrough, a display connected to the enclosure, a processing element in communication with the display. The device also includes a sensing element in communication with the processing element and an input button at least partially received within the button aperture and in communication with the sensing element, the input button configured to receive two types of user inputs. During operation, the sensing element tracks movement of the input button to determine the two types of user inputs.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: March 19, 2019
    Assignee: APPLE INC.
    Inventors: Colin M. Ely, Fletcher Rothkopf, Christopher Matthew Werner, John B. Morrell, Camille Moussette, Duncan Kerr, Anna-Katrina Shedletsky
  • Patent number: 10007340
    Abstract: Systems and methods for interfaces featuring surface-based haptic effects are described. One described system includes a sensor configured to detect a touch in a touch area when an object contacts a touch surface. The touch surface may correspond to the display area or may correspond to a non-display surface of a computing device or peripheral interfaced to a computing device. The system can further include an actuator in communication with the processor and coupled to the touch surface, the actuator configured to output a haptic effect and a processor configured to select a haptic effect to generate. The haptic effect can be selected based on a position of the touch and recognizing an input gesture provided by the touch and/or content displayed in a graphical user interface at a location mapped to a position in the touch area at or near the touch. The haptic effect may provide a texture, simulate an obstacle, and/or adjust the coefficient of friction of the surface.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: June 26, 2018
    Assignee: Immersion Corporation
    Inventors: Juan Manuel Cruz-Hernandez, Danny A. Grant, Ali Modarres, Andrew Gosline
  • Patent number: 9961108
    Abstract: A system and method for the secure storage and transmission of data is provided. A data aggregate device can be configured to receive secure data from a data source, such as a sensor, and encrypt the secure data using a suitable encryption technique, such as a shared private key technique, a public key encryption technique, a Diffie-Hellman key exchange technique, or other suitable encryption technique. The encrypted secure data can be provided from the data aggregate device to different remote devices over a plurality of segregated or isolated data paths. Each of the isolated data paths can include an optoisolator that is configured to provide one-way transmission of the encrypted secure data from the data aggregate device over the isolated data path. External data can be received through a secure data filter which, by validating the external data, allows for key exchange and other various adjustments from an external source.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: May 1, 2018
    Assignee: Savannah River Nuclear Solutions, LLC
    Inventors: Jody Rustyn Coleman, Richard W. Poland
  • Patent number: 9344085
    Abstract: A keypad with optical sensors is provided. The keypad comprises keycaps, each keycap having a top surface. One or more optical sensors are located beneath top surfaces of adjacent keycaps. One or more light guides extend from a respective optical sensor towards the top surfaces.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: May 17, 2016
    Assignee: BLACKBERRY LIMITED
    Inventors: Hsin Chin Lee, Antanas Matthew Broda, Amit Pal Singh
  • Patent number: 9275618
    Abstract: The invention relates to a haptic controller comprising a base (2), at least one maneuvering body (8) which is movably mounted on the base such that it can be moved under the action of a user, mechanical connection means (4, 15) comprising at least one deformable abutment consisting of an elastomer material between the maneuvering body and the base, and suitable for exerting a monotonous, non-linear resistive effort against an actuating effort of the maneuvering body, at least one sensor (12) placed in the haptic controller in such a way as to generate a signal representative of said actuating effort, and associated built-in or remote means (18) for processing the signal generated by the sensor, in order to supply an output signal for controlling at least one characteristic of a sound.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: March 1, 2016
    Assignees: UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Laurent Quartier, Eric Simon
  • Patent number: 8927919
    Abstract: A photoelectric switch includes a base having a tubular wall surrounding an axis, and a cover coupled to the base and including a rib unit that cooperates with the tubular wall to confine a rolling chamber. The rib unit has at least one portion overlapping the tubular wall. A light passage extends through the rolling chamber and two diametrically opposite sides of the tubular wall. A photoelectric unit is enclosed by the base and the cover, and includes a light emitter and a light receiver disposed respectively on two opposite ends of the light passage, and a rolling member disposed in the rolling chamber and movable between a blocking position to block the light passage and a non-blocking position to unblock the light passage.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: January 6, 2015
    Inventor: Tien-Ming Chou
  • Patent number: 8916814
    Abstract: A sensor switch includes a housing having a receiving chamber defined by top and bottom walls and a multi-sided chamber surrounding wall, and a light emitter and a light receiver disposed outwardly of the surrounding wall at two opposite positions. The surrounding wall is formed with two light passage holes which are aligned respectively with the light emitter and the light receiver to permit a light path to extend therethrough. The bottom wall has a bottom inclined wall face that forms an included angle of from ?80 degrees to 80 degrees with respect to a first axis. A rolling member is movable in the receiving chamber to alternately block and unblock the light path when moving to and fro on the bottom wall.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: December 23, 2014
    Inventor: Tien-Ming Chou
  • Patent number: 8805269
    Abstract: A sensor includes: a light emitting part that emits light; a light receiving part that receives reflected light, which is emitted from the light emitting part, is reflected, and returns; and plural arranged fiber bodies that are disposed on a front side of at least one of the light emitting part and the light receiving part and operate as a filter limiting an emission angle or a light receiving angle.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: August 12, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Keiichi Aoyagi
  • Patent number: 8748796
    Abstract: An interactive display panel includes scan lines, first data lines, sub-pixels, photo-sensors and second data lines. The scan lines and the first data lines are intersected to define sub-pixel regions. Each of the sub-pixels is located in one of the sub-pixel regions and has a display region, and each of the sub-pixels is electrically connected with one of the scan lines and one of the first data lines respectively. The photo-sensors are located outside the display regions of the sub-pixels. The scan lines and the second data lines are intersected and electrically connected with the photo-sensors.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: June 10, 2014
    Assignee: Integrated Digital Technologies, Inc.
    Inventors: Sen-Shyong Fann, Nae-Jye Hwang, Shen-Tai Liaw
  • Patent number: 8653438
    Abstract: A light source unit is disclosed for arranging on a plane and emitting a light beam oblique to the plane. The light source unit includes an illuminant element and a transparent encapsulator. The illuminant element has an upper surface and a lower surface both parallel to the plane. The transparent encapsulator physically contacts with the illuminant element and at least covers the upper surface of the illuminant element. The transparent encapsulator has an oblique surface above the upper surface and oblique to the upper surface. In addition, an optical inputting module having the light source unit mentioned above is disclosed.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 18, 2014
    Assignee: True Light Corporation
    Inventors: Chih-Cheng Chen, Jin-Shan Pan
  • Patent number: 8536472
    Abstract: A rotary switch mechanism includes a first rotatable member, a second rotatable member, a push button and a triggered switch. By rotating the first rotatable member, a first rotation command is executed. By rotating the second rotatable member, a second rotation command is executed. By moving a user's finger on the push button, a motion command is executed. By pressing down the push button to trigger the push switch, a pushing command is executed. In such way, the rotary switch mechanism may be used to input plural commands.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: September 17, 2013
    Assignee: Primax Electronics Ltd.
    Inventors: Chun-Che Wu, Chun-Nan Su
  • Patent number: 8362413
    Abstract: A contact detection device includes a number of first bars and second bars. Each first bar includes a number of first sheets. Each second bar includes a number of second sheets. The first bars and the second bars intersect to form a grid with a number of nodes as a contact detection area, each node having exclusive coordinates. Each first sheet defines a light hole, and the light holes are arranged in the same column line in the grid. Opposite sides of each first sheet arranges one photosensitive member above the corresponding light hole, and position of each photosensitive member is determined according to the coordinates of the nearest node in a predetermined direction. Opposite ends of each two adjacent second bars respectively arrange one light emitter therebetween. When one point of the grid is pressed, the light emitted by the light emitter irradiates the photosensitive member.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: January 29, 2013
    Assignees: Fu Tai Hua Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Man-Tian Liu, Jin-Wei Xiao
  • Patent number: 8344313
    Abstract: A touch system including a touch panel and a readout circuit is disclosed. The touch panel is integrated with a plurality of photosensitive elements within pixel elements, and capable of displaying at least touch position by at least an optical inputting. The touch panel provides a signal data when the touch panel is touched. The readout circuit is configured to receive the signal data and includes a transformation unit and a processing unit. The transformation unit generates a signal value based on the signal data and a transformation parameter. The processing unit executes a specific action when the signal value is less than a preset value.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: January 1, 2013
    Assignee: Integrated Digital Technologies, Inc.
    Inventors: Chih-Ming Yuan, Shen-Tai Liaw, Naejye Hwang, Sen-Shyong Fann
  • Patent number: 8124926
    Abstract: The key device of the present invention is provided with: first light-emitting portions that emit light propagating in a first direction; second light-emitting portions that emit the light R propagating in a second direction; converters H that can convert a propagating direction of light from the first direction to the second direction, or from the second direction to the first direction; first light-receiving portions that receive light propagating in the first direction through the converters; second light-receiving portions that receive light propagating in the second direction through the converters; and a plurality of keys, which are provided correspondingly to the converters, and which determine whether the propagating direction of light is converted in the converters.
    Type: Grant
    Filed: March 20, 2009
    Date of Patent: February 28, 2012
    Assignee: Kyocera Corporation
    Inventor: Yuuji Ishida
  • Patent number: 7786428
    Abstract: An optical controlling circuit and an electrical controlled circuit such as a motor control circuit are interconnected by an electro-optic interface. A passive optical switch located in the optical circuit at a position remote from the electrical circuit is physically actuated to generate a change in optical transmission state of the optical circuit. At the electro-optic interface, the change in optical transmission state of the optical circuit is detected and triggers a change in the electrical transmission state of the electric circuit. Embodied as STOP and START pushbuttons, a pair of such passive optical switches at a position remote from the electric circuit reduces the risk that actuating motor control circuits and the like will cause arcing and, in hazardous environments, explosion.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: August 31, 2010
    Inventor: George Dinca
  • Patent number: 7786425
    Abstract: An optical sensor for a touch-sensitive push button of a control mechanism for an electronic household appliance has a transmitter, which emits electromagnetic radiation, and a receiver, which receives reflected electromagnetic radiation. A cover is at least partly transparent to the electromagnetic radiation and the transmitter and the receiver are arranged behind the cover. A radiation guide mechanism, for example a diaphragm frame, is provided between the transmitter and the receiver, on the one hand, and the cover, on the other hand, for guiding the radiation emitted from the transmitter towards the cover and to guide the reflected radiation penetrating the cover to the receiver. The diaphragm frame broadens the emission characteristic of the transmitter outward from the cover and/or the reception characteristic of the receiver inward into the cover.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: August 31, 2010
    Assignee: DIEHL AKO Stiftung & Co. KG
    Inventor: Georg Arnold
  • Patent number: 7655901
    Abstract: A mobile communication device having a keyboard with a set of keys representing alpha-numeric characters, the keyboard comprising a light source, located within said mobile communication device; for providing a light; a set of sensors, associated with said keys, for sensing an amount of said light in a vicinity of each of said set of sensors, to determine which of said set of keys has been selected; and a transparent flat cover, overlying said set of sensors, displaying said set of alpha-numeric characters, for associating said set of alpha-numeric characters with said set of sensors.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: February 2, 2010
    Assignee: Research in Motion Limited
    Inventors: Jacek S. Idzik, Robert J. Lowles
  • Patent number: 7645980
    Abstract: A photoelectric switch is disclosed. An illustrative embodiment of the photoelectric switch includes at least one light source, a reflective surface provided in light-receiving relationship with respect to the at least one light source, a release button engaging the reflective surface and positional between first and second positions, a photocell provided in light-receiving relationship with respect to the reflective surface when the release button is disposed in the first position, a latch control circuit connected to the photocell and a latch connected to the latch control circuit. The light path incorporates a collimator to restrict operation of the system to the relationship of the light source and the retroreflector.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: January 12, 2010
    Assignee: The Boeing Company
    Inventors: William C. Sanford, Henry V. Fletcher, Trevor M. Laib
  • Patent number: 7619206
    Abstract: A switch for a domestic appliance, such as a cooking range, that includes a radiation emitter, an auxiliary radiation emitter and a radiation receiver, the radiation receiver adapted to receive at least part of the radiation emitted from the radiation emitter and auxiliary radiation emitter and to generate one or more reception signals whose values depend on the radiation received. A controller associated with the switch generates a periodic control pulse (Pc) at a first time interval to cause the radiation emitter to emit radiation for a duration of time and a periodic test pulse (Pt) at a second time interval different than the first time interval to cause the auxiliary radiation emitter to emit radiation for a duration of time. The controller configured to evaluate the one or more reception signals to determine if an error or malfunction exists in the switch.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: November 17, 2009
    Assignee: Eika, S. Coop
    Inventors: Jose Miguel Amoriza Berasaluce, Gonzalo Fernández Llona, Eider Landa Oñate, Eneko Muguerza Murgizu
  • Publication number: 20090152451
    Abstract: A touch-sensitive momentary-contact switch includes an infrared-radiation-emitting transmitter, an infrared-radiation-receiving receiver and at least one visible-light-emitting signal element. The transmitter, receiver and signal element radiate into a single light-guiding element. Due to optical beam guidance, a separation of a transmission channel and a reception channel in the light-guiding element is effected in such a way that at a top-side area of the light-guiding element remote from the transmitter and the receiver, a superimposition of a region that can be irradiated by the transmitter and a region that can be detected by the receiver is produced only on a small portion of the area. An operating device for a domestic appliance including at least one touch-sensitive momentary-contact switch, is also provided.
    Type: Application
    Filed: December 12, 2008
    Publication date: June 18, 2009
    Applicant: DIEHL AKO STIFTUNG & CO. KG
    Inventors: Georg Arnold, Johann Wolf
  • Patent number: 7525084
    Abstract: An input device includes an input detection portion which enables detection of position inputs according to change of capacitance; a position detection portion which reads detection signals from the input detection portion and detects positions thereof; a light emitting portion placed near the input detecting portion; driving portion which drives the light emitting portion; a monitoring portion which monitors a driving voltage applied from the driving portion to the light emitting portion; and a control portion which controls a generation of pulse signals at times when the position detection portion reads the position inputs from the input detection portion, the generation of the times being based on the driving voltage monitored by the monitoring portion.
    Type: Grant
    Filed: April 6, 2007
    Date of Patent: April 28, 2009
    Assignee: Panasonic Corporation
    Inventors: Norifumi Sata, Naoki Tatehata
  • Patent number: 7498560
    Abstract: A keypad is provided. The keypad includes an optical waveguide on the top surface of which at least one prism pattern is formed, a light source for generating light and causing the light to be incident to a side surface of the optical waveguide, and at least one optical detector located below the optical waveguide to correspond to the at least one prism pattern.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: March 3, 2009
    Assignee: Samsung Electronics Co. Ltd
    Inventors: Sun-Lyeong Hwang, Ki-Chan Kim
  • Patent number: 7485846
    Abstract: A scanning microscope with a first and at least one other detection channel is disclosed. The first detection channel comprises at least one first detector and the other detection channel comprises at least one other detector to detect the detection light given off by a sample. A switching mechanism is provided that selectively directs the detection light into the first or into the other detection channel.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: February 3, 2009
    Assignee: Leica Microsystems CMS GmbH
    Inventor: Frank Schreiber
  • Patent number: 7485843
    Abstract: The disclosure is directed to a touch proximity sensing system detecting the presence or absence of a triggering object. The system includes a reflective optical sensor, an active surface, and a light pipe in combination. The reflective optical sensor has an emitter for creating a light and a receiver for detecting a reflected light of the emitter. The active surface is suitable for receiving the triggering object, such as a stylus or finger, or the like. The light pipe is disposed between the reflective optical sensor and the active surface. The length of the light pipe is such that the reflective optical sensor and the active surface are spaced-apart from each other. The light pipe transports the light from the emitter to the active surface. In the presence of the triggering object, light from the emitter is reflected and the light pipe transports the reflected light to the receiver.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: February 3, 2009
    Assignee: Masstech Group Inc.
    Inventors: Sudy Shen, Dan Praisler
  • Patent number: 7439484
    Abstract: In an optical input device based on movement of an object (15) and the device relative to each other and which comprising at least one optical sensor unit including a laser (3) having a laser cavity for generating a measuring beam (13), converging means (50) for converging the measuring beam in an action plane and for converging measuring beam radiation reflected by the object in the laser cavity to generate a self-mixing effect in the laser and measuring means for measuring the result of the self-mixing effect, which effect is determined by said movement, the converging means (50) is adapted to provide a self-mixing effect that is smaller than a possible maximum but larger than a detection threshold for an extended range of distances (?Z) between the object and the device. This allows obtaining the required self-mixing effect in an extended range of distances between the object and the device.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: October 21, 2008
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Martin Dieter Liess, Aldegonda Lucia Weijers
  • Patent number: 7355164
    Abstract: An infrared momentary-contact switch for a control device of a domestic appliance, has a transmitter which emits infrared radiation and a receiver which receives infrared radiation. The transmitter and receiver are disposed behind a cover through which at least some of the infrared radiation passes. In order to achieve a good ratio of useful signal to interference signal for the momentary-contact switch, the transmitter has an associated first optical fiber element and the receiver has an associated second optical fiber element. The ends of these optical fiber elements which respectively face away from the transmitter and receiver are adjacent one another and adjoin the cover. A control device is also provided.
    Type: Grant
    Filed: May 5, 2005
    Date of Patent: April 8, 2008
    Assignee: Diehl AKO Stiftung & Co. KG
    Inventor: Georg Arnold
  • Patent number: 7161137
    Abstract: Keys, which are incorporated in an automatic player piano, are monitored with an optical transducer system. The optical transducer system includes sensor heads provided on both sides of the key trajectories, LEDs connected to predetermined sensor heads through optical fibers, LDDs connected to the other sensor heads through optical fibers and a controlling unit. A luminescence controller is connected to the LEDs for optimizing the luminescence, and bias controllers are respectively connected to the LDDs. The luminescence controller and bias controllers optimize the luminescence of emitted light and the bias level of electric signals so that the optical transducer system is free from the individuality of component parts and the deterioration.
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: January 9, 2007
    Assignee: Yamaha Corporation
    Inventors: Tomoyuki Ura, Tsutomu Sasaki, Yasuhiko Ohba, Masahisa Hashimoto
  • Patent number: 7132643
    Abstract: An optical transducer includes a photo-electric converter supported by a shank flange rail and optical modulators respectively attached to hammers of an automatic player piano; since a neck portion makes a photo-modulating pattern closer to the rotational axis of each hammer than a boss portion adhered to the side surface of the hammer shank, the photo-modulating pattern is rotated in a narrow space in the vicinity of the rotational axis so as to permit the photo-electric converter to monitor the hammer motion between the rest position and the end position without any interference with other component parts, and the boss portion is easily adhered to the side surface under the condition that a worker lifts the hammer over the adjacent hammers.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: November 7, 2006
    Assignee: Yamaha Corporation
    Inventor: Tadaharu Kato
  • Patent number: 7053360
    Abstract: The member comprises: a support structure presenting a control zone, said control zone having a through hole; a non-conductive elastic covering covering a control face of the control zone, at least in register with the through hole; and a touch-sensitive detector at least partially in register with the through hole and mounted on or in the vicinity of the face of the control zone that is opposite from its control face; the elastic covering having a rest position in which the finger of an operator contacting the free surface of the elastic covering lies outside the touch detection space of the detector, and a deformed position in which the finger of the operator in contact with the free surface of the elastic covering lies within the touch detection space of the detector. According to the invention, in the rest position, the elastic covering is spaced apart from the touch-sensitive detector, and in the deformed position, the elastic covering is in contact with the touch-sensitive detector.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: May 30, 2006
    Assignee: Faurecia Industries
    Inventors: Lionel Balp, Denis Bocquet, Christian Henigue, Jean-Luc Roudot
  • Patent number: 7049576
    Abstract: An optical position transducer is provided for each of the black/white keys incorporated in a composite keyboard musical instrument; the optical position transducer includes a photo-coupler radiating a light beam, an optical filter moved across the light beam, a recess formed in the black/white key at a proper position where the optical filter is aligned with a target trajectory crossing the light beam and an elastic coupler pressed to an inner surface defining the recess and secured to the optical filter so that a worker assembles the optical filter with the key by inserting the elastic coupler into the recess.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: May 23, 2006
    Assignee: Yamaha Corporation
    Inventors: Tadaharu Kato, Shigeru Muramatsu, Shigeaki Sato
  • Patent number: 7015458
    Abstract: A fiber optic control system for controlling remotely located devices. The control system includes an illumination source for producing a light beam and a plurality of optical fibers. Each fiber is arranged to receive a respective portion of a light beam at a coupling end. A planar light switch, including a plurality of light attenuating pixels, is positioned between the illumination source and the optical fiber coupling ends. Each of the pixels of the planar light switch is electronically controllable for selectively coupling portions of the light beam to respective coupling ends of the optical fibers. A plurality of light activated circuits are optically coupled to a respective illumination ends of the optical fiber. The light activated circuits are responsive to the respective portion of the light beam radiated from the respective illumination ends for providing a control signal to a remotely located device.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: March 21, 2006
    Assignee: Emerging Manufacturing Technology, Inc.
    Inventor: Eric Endicott
  • Patent number: 6975783
    Abstract: An array of micro electromechanical switches (MEMs) (21–35) is actuated by a source of one or more light beams, such as a laser (60). A positioning unit (70) is arranged to direct the one or more light beams onto the MEMs, thereby actuating them without the need for control lines. The positioning unit may include a scanning unit (80) which positions a rotatable mirror (72).
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: December 13, 2005
    Assignee: Northrop Grumman Corporation
    Inventor: Marshall Y. Huang
  • Patent number: 6946980
    Abstract: An input device comprising a fixed light source, a plurality of light detectors surrounding the light source, and a member comprising reflective surface portions slidably mounted above the light source. When the member is slid from a neutral position to one of a plurality of activating position, light from the light source is reflected by one of the reflective surface portions directly from the light source to an associated light detector.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: September 20, 2005
    Assignee: Agilent Technologies, Inc.
    Inventors: Kok Hing Fo, Yee Loong Chin, Hoo Chong Wong
  • Patent number: 6933435
    Abstract: An optical position transducer is provided for each of the black/white keys incorporated in a composite keyboard musical instrument; the optical position transducer includes a photo-coupler radiating a light beam, an optical filter moved across the light beam, a recess formed in the black/white key at a proper position where the optical filter is aligned with a target trajectory crossing the light beam and an elastic coupler pressed to an inner surface defining the recess and secured to the optical filter so that a worker assembles the optical filter with the key by inserting the elastic coupler into the recess.
    Type: Grant
    Filed: June 16, 2004
    Date of Patent: August 23, 2005
    Assignee: Yamaha Corporation
    Inventors: Tadaharu Kato, Shigeru Muramatsu, Shigeaki Sato
  • Patent number: 6876482
    Abstract: MEMS Device Having Contact and Standoff Bumps and Related Methods. According to one embodiment, a movable MEMS component suspended over a substrate is provided. The component can include a structural layer having a movable electrode separated from a substrate by a gap. The component can also include at least one standoff bump attached to the structural layer and extending into the gap for preventing contact of the movable electrode with conductive material when the component moves.
    Type: Grant
    Filed: November 8, 2002
    Date of Patent: April 5, 2005
    Assignees: Turnstone Systems, Inc., Wispry, Inc.
    Inventor: Dana Richard DeReus
  • Patent number: 6870151
    Abstract: A shutter holder has a frame-like base portion and a tie plate inwardly projecting from a side portion of the base portion in a cantilever fashion, and the tie plate has a rectangular cross section smaller in thickness and/or width, i.e., second moment of inertia than the cross section of the base plate at the boundary; even if a staple is deeply driven into a moving object such as a wooden key, the tie plate is widely deflected so as to absorb the deformation of the wooden key, and permits a shutter plate to keep itself perpendicular to the lower surface of the wooden key.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: March 22, 2005
    Assignee: Yamaha Corporation
    Inventor: Tadaharu Kato
  • Patent number: 6803559
    Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: October 12, 2004
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
  • Patent number: 6804427
    Abstract: Piezoelectric members are arranged in a rectangular array of 32 columns and 32 rows and a polyimide film is sandwiched at front and back sides thereof by spacers having through-holes formed only around cross-points of optical waveguides therebetween. An end of a piezoelectric member in the shape of a plate is fixed to the polyimide film with the spacer interposing therebetween. As an opening/closing operation mechanism for a cut section for change-over between propagation directions of light, there is used piezoelectric member constituted of a piezoelectric element capable of pressing a region around a cross-point point of optical waveguides from one side to the other side. With such a construction adopted, there can be obtained an optical switch capable of not only reducing an optical loss, but also preventing a change-over abnormality and burning from occurring and in addition, capable of further downsizing.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: October 12, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Seiichiro Tabata
  • Patent number: 6765193
    Abstract: Optical touch switches are implemented based on the use of light total internal reflection and light scattering concepts. The optical touch switch basically consists of a light source, a light guide, a photodetector, and an electronic controller. The fingertip touching on the touching surface of the optical touch switch leads to the change in electrical current produced by the photodetector. As a result, the electronic control box senses this change of electrical current and allows the electrical load to stay at the desired state. Key advantages include ease of implementation, prevention of the light beam incident directly on the user's eyes, and ability to accept both strong and weak mechanical forces from users.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: July 20, 2004
    Assignee: National Science and Technology Development Agency
    Inventor: Sarun Sumriddetchkajorn
  • Patent number: 6747402
    Abstract: An EL element includes plural light transmitting front-electrodes forming plural lines by wiring and plural back-electrodes forming plural lines by further wiring. The front-electrodes are angled relative to the back-electrodes and a light-emitting layer is disposed between the front-electrodes and the back-electrodes. The EL element combined with a controller works as a lighting unit, which controls light emission at any place, so that a variety of lighting is realized by the lighting unit.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: June 8, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Minoru Hato, Yoshiharu Abe
  • Patent number: 6740864
    Abstract: A method and apparatus for monitoring MEMS-based optical switches and cross-connects. A plurality of partial reflectors are introduced into optical paths of the switch for reflecting light transmitted along the optical paths through a transparent substrate of the switch, without disturbing transmission of the light along the optical paths. The reflected light is transmitted through the substrate, which is preferably made of silicon and transparent to wavelengths of light used in DWDM systems. A photodetector array bonded to the underside of the substrate detects the light reflected by the plurality of partial reflectors through the substrate. The light detected by the photodetector array indicates the switching states and functionality of the switch, and can be processed by circuitry associated with the array.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: May 25, 2004
    Assignee: Finisar Corporation
    Inventor: J. Christopher Dries
  • Patent number: 6741189
    Abstract: A keypad includes a light emitting source, a light detector and waveguide assembly adapted to receive light from the light emitting source and having a plurality of waveguide branches adapted to conduct light to the light detector. A plurality of user actuated keys is provided. Each key includes a moveable engaging member disposed proximate a waveguide branch to engage the waveguide branch as a function of key operation.
    Type: Grant
    Filed: October 6, 1999
    Date of Patent: May 25, 2004
    Assignee: Microsoft Corporation
    Inventors: R. Thomas Gibbons, II, John M. Lutian, Kennard E. Nielsen
  • Patent number: 6639205
    Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: October 28, 2003
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
  • Patent number: 6610974
    Abstract: A method for positioning a movable reflector in an optical switch. A set of optical power values are generated by measuring optical power related to optical reflections from the movable reflection for a plurality of positions of the movable reflector. A processor is used to generate a mathematical approximation of a relationship of optical power versus reflector position based on the set of optical power values. A position of the movable reflector is chosen based on a point in the mathematical approximation of the relationship of optical power versus reflector position.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: August 26, 2003
    Assignee: Calient Networks, Inc.
    Inventors: Peter Hunt, Kevin White
  • Patent number: 6556149
    Abstract: Switches and joysticks comprise user-moveable two position and multi position switches, including simple on/off and variable switches such as dimmers. The switches operate on the principle of detecting the position of a user-grippable switch arm, a portion of which bears on a pressure-sensitive pad. The pad is a deformable material which detects and localizes pressure against the pad, by transmitting into the pad matrix a wave energy such as light, and detecting the intensity of same. As the pad is locally compressed, intensity of the wave energy increases in the region around the compression. The position of a switch arm may thus be detected, and the information transmitted to a central processing unit, for further processing.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: April 29, 2003
    Assignee: Canpolar East Inc.
    Inventors: Ernest M. Reimer, Robert Inkster
  • Publication number: 20030057361
    Abstract: A tilt switch includes an optoelectronic sensor member with light emitting and receiving units disposed in an insulating housing. A ball member is received rollably in an accommodating chamber of the housing. When the housing is tilted, the ball member can move between a first position, where a light beam emitting from the emitting unit is permitted to be received by the receiving unit so as to enable the receiving unit to make an electrical connection between two terminals, and a second position, where the light beam is prevented from being received by the receiving unit so as to break the electrical connection.
    Type: Application
    Filed: September 21, 2001
    Publication date: March 27, 2003
    Inventor: Tien-Ming Chou
  • Patent number: 6519381
    Abstract: An optical switch includes a polymer optical waveguide that is a plate material basically made of polymer and a drive element. The plate material has optical waveguides that extend linearly within the plate material and a cut provided such that it traverses the optical waveguides. The drive element selects a path of light by reducing and increasing a gap of the cut.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: February 11, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tatsuo Hatta, Atsushi Sugitatsu, Takeshi Saito, Aritomo Uemura, Jun Fujita
  • Patent number: 6420642
    Abstract: An automatic player is combined with an acoustic piano for selectively moving black/white keys with plungers of solenoid-operated key actuators, and plunger sensors detect current positions of the plungers on trajectories for supplying feedback signals to a controller for exactly controlling the solenoid-operated key actuators, wherein each of the plunger sensors has a reflecting plate fixed to the bottom surface of the plunger and a photo-coupler radiating a light beam to the reflecting plate for producing the feedback signal from the reflection so that the plunger sensor is compact and free from noise and aged-deterioration.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: July 16, 2002
    Assignee: Yamaha Corporation
    Inventors: Shigeru Muramatsu, Tadaharu Kato
  • Patent number: 6331704
    Abstract: The presence of particulate debris flowing in a hydraulic fluid flow system includes a source of infra-red light passing through a window of the fluid flow line while fluid is flowing therethrough. A portion of the light is directed to a monitoring photodiode prior to reaching the fluid flow line. A detector photodiode is positioned to receive light passing through the flow line, the hydraulic fluid flowing therethrough and out of a second window. A trap is positioned between the hydraulic fluid flow line and the detector photodiode to prevent the direct rays of light from reaching the detector photodiode while permitting scattered light to reach the detector photodiode. A reduction in the amount of light reaching the detector photodiode results in an alarm being activated.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: December 18, 2001
    Assignee: Vickers, Incorporated
    Inventor: Allan B. Owen