Patent application number | Description | Published |
20140292313 | MAGNETIC SENSOR SYSTEM INCLUDING THREE DETECTION CIRCUITS - A magnetic sensor system includes a scale and a magnetic sensor arranged in a relative positional relationship variable in a first direction, and a computing unit. The magnetic sensor includes a first detection circuit, a second detection circuit and a third detection circuit that are disposed at a first position, a second position and a third position, respectively. Each of the first to third detection circuits includes a spin-valve MR element. A difference between two of the first to third positions that are the most distant from each other in a first direction falls within a one-pitch amount of change in the relative positional relationship between the scale and the magnetic sensor. The computing unit generates first and second post-computation signals having mutually different phases by computation using detection signals from the first to third detection circuits. | 10-02-2014 |
20140292314 | MAGNETIC SENSOR SYSTEM INCLUDING TWO DETECTION CIRCUITS - A magnetic sensor system includes a scale and a magnetic sensor arranged in a relative positional relationship variable in a first direction, and a computing unit. The magnetic sensor includes a first detection circuit disposed at a first position and a second detection circuit disposed at a second position. Each of the first and second detection circuits includes a spin-valve magnetoresistive element. The difference between the first position and the second position in the first direction is smaller than or equal to 1.25% of a one-pitch amount of change in the relative positional relationship between the scale and the magnetic sensor. The computing unit generates an abnormal-event determination signal indicative of the presence of an abnormal event in the magnetic sensor by computation using detection signals from the first and second detection circuits. | 10-02-2014 |
20140292321 | MAGNETIC SENSOR WITH REDUCED EFFECT OF INTERLAYER COUPLING MAGNETIC FIELD - A magnetic sensor includes an MR element and a pair of magnets. The MR element includes a magnetization pinned layer having a magnetization pinned in a direction parallel to an X direction, a free layer having a magnetization that varies depending on an X-direction component of an external magnetic field, and a nonmagnetic layer interposed between the magnetization pinned layer and the free layer. The magnetization pinned layer, the nonmagnetic layer and the free layer are stacked to be adjacent in a Y direction. The free layer receives an interlayer coupling magnetic field in a direction parallel to the X direction resulting from the magnetization pinned layer. The pair of magnets applies a bias magnetic field to the free layer. The bias magnetic field includes a first component in a direction opposite to that of the interlayer coupling magnetic field and a second component in a Z direction. | 10-02-2014 |
20140292322 | MAGNETIC SENSOR WITH REDUCED EFFECT OF INTERLAYER COUPLING MAGNETIC FIELD - A magnetic sensor includes an MR element and a bias field generation unit. The MR element includes a magnetization pinned layer having a magnetization pinned in a direction parallel to an X direction, a free layer having a magnetization that varies depending on an X-direction component of an external magnetic field, and a nonmagnetic layer interposed between the magnetization pinned layer and the free layer. The magnetization pinned layer, the nonmagnetic layer and the free layer are stacked to be adjacent in a Y direction. The free layer receives an interlayer coupling magnetic field in a direction parallel to the X direction resulting from the magnetization pinned layer. The bias field generation unit applies a bias magnetic field to the free layer. The bias magnetic field includes a first component in a direction opposite to that of the interlayer coupling magnetic field and a second component in a Z direction. | 10-02-2014 |
20150066426 | ROTATING FIELD SENSOR - A first, a second, and a third computing circuit respectively generate a first post-computation signal with a second harmonic component reduced as compared with first and second signals, a second post-computation signal with the second harmonic component reduced as compared with third and fourth signals, and a third post-computation signal with the second harmonic component reduced as compared with fifth and sixth signals. A fourth and a fifth computing circuit respectively generate a fourth post-computation signal with a third harmonic component reduced as compared with the first and second post-computation signals, and a fifth post-computation signal with the third harmonic component reduced as compared with the second and third post-computation signals. A sixth computing circuit determines a detected angle value based on the fourth and fifth post-computation signals. | 03-05-2015 |
Patent application number | Description | Published |
20100020563 | AUTOMOTIVE LAMP HAVING FAN - An automotive lamp is provided with: a lamp chamber formed so as to include a lamp body having a front end opening portion and a translucent cover provided on the lamp body so as to cover the front end opening portion; a lamp unit that is housed inside the lamp chamber and includes a semiconductor light emitting device as a light source; a bracket that includes a light source mounting portion having a mounting surface for the semiconductor light emitting device and a plurality of radiating fins, thermally in contact with the light source mounting portion and arranged such that ventilation passages extend from the lamp body side toward the translucent cover, are formed, and that supports the lamp unit; and a fan that blows air such that air flows through the ventilation passages from the lamp body side toward the translucent cover. | 01-28-2010 |
20100315829 | LIGHT EMITTING MODULE AND AUTOMOTIVE HEADLAMP - A light emitting module includes: a semiconductor light emitting element; a plate-shaped light wavelength conversion ceramic that is provided so as to face the light emitting surface of the semiconductor light emitting element and that is configured to convert the wavelength of the light, which has been emitted by the semiconductor light emitting element; and a reflective film that is formed on the surface of the light wavelength conversion ceramic and that is configured to shield part of the light, which has been transmitted through the light wavelength conversion ceramic. The light wavelength conversion ceramic is composed on an inorganic material. | 12-16-2010 |
20110002137 | LIGHT EMITTING MODULE AND AUTOMOTIVE LAMP - A light emitting module includes a light emitting element, and a phosphor configured to emit visible light after being excited by the light emitted by the light emitting element. The light emitting element is structured such that the peak wavelength of the light, emitted by the light emitting element immediately after the start of an operation of the light emitting element, is shorter than that of an excitation spectrum for the phosphor, and the peak wavelength of the light emitted by the light emitting element is shifted toward that of the excitation spectrum for the phosphor with an increase in the temperature of the element due to its operation. | 01-06-2011 |
20110222303 | VEHICLE HEADLAMP - A vehicle headlamp is provided with a light emitting module. The light emitting module is provided with a light emitting portion and a frame member. The frame member surrounds the light emitting portion to define a light emitting surface. The frame member includes a first surface and a second surface in which a part of an internal diffusing/reflection light reflected on the first surface is to be projected upwardly of a cutoff line of a low-beam light distribution pattern, and a part of the internal diffusing/reflection light reflected on the second surface is to be projected downwardly of the cutoff line. A reflectance of the first surface is lower than a reflectance of the second surface. | 09-15-2011 |
20140003076 | VEHICULAR LAMP AND WINDOW UNIT | 01-02-2014 |