Patent application number | Description | Published |
20100194475 | AMPLIFYING CIRCUIT WITH BYPASS CIRCUIT, AND ELECTRONIC DEVICE USING THE SAME - An amplifying circuit with a bypassing function includes an input terminal to which a signal is input from an antenna, an amplifier connected to the input terminal, a first inductor connected between the input port and a ground, and a bypass circuit connected between the input terminal and the output port of the amplifier. The bypass circuit includes a first port connected to the input terminal, a second port connected to the output port of the amplifier, a switch, a capacitor, and a second inductor. The switch is connected in series between the first and second ports. The capacitor is connected in series to the switch between the first and second ports. The second inductor is connected in series to the switch and the capacitor between the first and second ports. The amplifying circuit does not reduce power of a signal drastically even when the signal passes through the bypass circuit, as compared to passing through the amplifier, thus maintaining a profile of a propagation property unchanged and provide preferable transmission quality. | 08-05-2010 |
20110038429 | SIGNAL BRANCHING FILTER, ELECTRONIC DEVICE USING THE SAME, ANTENNA APPARATUS, AND SIGNAL TRANSMISSION SYSTEM USED IN ALL OF THE ABOVE - A signal branching filter according to the invention is a signal branching filter connected to a network having at least four terminals. The signal branching filter includes a first line one end of which is connected to a first terminal of the network, a second line one end of which is connected to a second terminal of the network, a third line one end of which is connected to a third terminal of network, and a fourth line one end of which is connected to a fourth terminal of the network. The other end of the first line and the other end of the second line are connected to each other at a first node, and the other end of the third line and the other end of the fourth line are connected to each other at a second node. When a signal is received from the first node, a phase difference between a phase of a signal appearing on a second node side of the third line and a phase of a signal appearing on a second node side of the fourth line is almost 180°±360°*n is an integer equal to or larger than 0). | 02-17-2011 |
20120113492 | OPTICAL REFLECTION ELEMENT - An optical reflecting element includes a mirror, and a pair of high-frequency vibrators and a pair of low-frequency vibrators for vibrating the mirror. The high-frequency vibrators include a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer, and a drive electrode and a first monitor electrode as the top electrode layer. One end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, and a second monitor electrode as the top electrode layer. The other end of the low-frequency vibrator has the substrate shared with the high-frequency vibrator, a bottom electrode layer, a piezoelectric layer, a drive electrode, a first monitor electrode, and an insulator layer as a dead zone for preventing a piezoelectric effect due to the piezoelectric layer from reaching the first monitor electrode. The first monitor electrode provided on the low-frequency vibrator is connected from the top of the vibrator to an extraction electrode. | 05-10-2012 |
20120293850 | OPTICAL SCANNING APPARATUS AND OPTICAL REFLECTION DEVICE USED THEREFOR - An optical scanning apparatus is configured to include a light source that emits a beam of light, and a scanning device that scans the beam of light in two axial directions that are mutually substantially perpendicular at a first frequency f | 11-22-2012 |
20120320439 | OPTICAL REFLECTION ELEMENT - An optical reflection element has a frame, a pair of meandering-shaped vibration elements, a mirror having a reflection surface, and a pair of protective beams. The vibration elements have their respective outer ends supported by confronting portions of an inside of the frame. The vibration elements support the mirror with respective inner ends thereof. The protective beams extend from the respective confronting portions of the inside of the frame toward the mirror with a predetermined space from the vibration elements and in parallel with a vibration axis of the vibration elements. | 12-20-2012 |
20130050791 | OPTICAL REFLECTION ELEMENT - An optical reflection element includes a frame, a meandrous vibrating part having an outer end connected with an inside of the frame, and a mirror part supported by an inner end of the meandrous vibrating part. The meandrous vibrating part has a meandrous shape that includes curved portions and vibrating beams alternately connected with the curved portions. A curvature of respective one of the curved portions is smaller than a curvature of at least one of the curved portions which is located closer to the inner end than the respective one of the curved portions. This optical reflection element has a large deflection angle of the mirror part. | 02-28-2013 |
20130107339 | OPTICAL REFLECTION ELEMENT | 05-02-2013 |
20130271804 | VIBRATING ELEMENT HAVING MEANDERING SHAPE, AND OPTICAL REFLECTION ELEMENT - A vibrating element having a meandering shape includes a vibrating beam and a piezoelectric actuator provided on the vibrating beam. The vibrating beam has a meandering-shape substantially formed into the plurality of continuous turned-down shapes. The vibrating beam includes the plurality of turned-down units and the plurality of coupling units coupled to the turned-down units, and the coupling units and the turned-down units are alternately disposed. The piezoelectric actuator includes a lower electrode provided on the vibrating beam, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. A non-existence region where the piezoelectric film does not exist is provided in at least one of a neighborhood of a midpoint of an inner circumference of each of the turned-down units and a neighborhood of a curvature changing point in which a curvature of the inner circumference of each of the turned-down shapes changes. | 10-17-2013 |
20140159620 | ACTUATOR DRIVE DEVICE - An actuator drive device is configured to drive an actuator. The actuator drive device includes a storage section for storing a drive condition of the actuator, a processor for calculating and outputting drive signal D(t) based on a drive base signal V(t) calculated based on the drive condition with respect to time t, and a generator for outputting, based on the drive signal D(t) calculated, a driving signal for driving the actuator. The drive base signal V(t) is a sum of a fundamental wave and at least one harmonic wave of the fundamental wave. The processor is operable to determine the coefficient a | 06-12-2014 |
20140368896 | OPTICAL REFLECTING ELEMENT AND ACTUATOR - An optical reflecting device includes a movable plate having a reflecting surface, a first support portion, a first drive part, a first frame, and a monitor part for detecting the rotation of the movable plate. The first support portion is connected to the movable plate. The first drive part is formed in the first support portion and rotates the movable plate about a first axis. The first frame contains the movable plate and the first support portion, and is connected to the first support portion. The monitor part extends from that portion of the outer periphery of the movable plate which is most distant from the first axis. | 12-18-2014 |
20140375898 | SCANNING MIRROR AND SCANNING IMAGE DISPLAY DEVICE - A scanning mirror includes a mirror unit configured to reflect a laser beam, a supporter configured to cause the mirror unit to rotate and oscillate, and an oscillation sensor configured to output a monitor signal indicating oscillation of the mirror unit. A photodetector detects an intensity of the laser beam. When a value of the monitor signal falls out of a predetermined range of a normal operation and a value of the intensity detected by the photodetector fails to decrease, a breaking signal for causing the supporter to oscillate more than a breaking limit angle of the supporter is input. This scanning mirror and an image projection device using this scanning mirror can display an image at sufficient brightness safely. | 12-25-2014 |